Insecticidal effects of different doses of the dust and methanol extracts of Garcinia kolae on Callosobruchus maculatus and Sitophilus zeamais were tested. The dust had no significant effect on the two insects, none o...Insecticidal effects of different doses of the dust and methanol extracts of Garcinia kolae on Callosobruchus maculatus and Sitophilus zeamais were tested. The dust had no significant effect on the two insects, none of them died even at 3 d after treatment. The methanol extracts, however, had rapid lethal effects on both C. maculatus and S. zeamais. The mortality of C. maculatus by the lowest concentration of methanol extracts ranged from 95%-100% whereas in S. zeamais, the mortality ranged from 87.5%-100% and 70%-100% in concentrations of 1 g extract＋3 ml methanol and 1 g extract＋5 ml methanol, respectively, from 24 to 48 h. The least concentration of 1 g extract＋l 5 ml methanol had no significant lethal effect on Sitophilus zeamais.展开更多
We present here for the first time,the Raman and infrared spectroscopic investigation of amphiboles from the World's deepest borehole,the Kola super-deep borehole,at the depth of 11.66 km.The Kola Super-deep boreh...We present here for the first time,the Raman and infrared spectroscopic investigation of amphiboles from the World's deepest borehole,the Kola super-deep borehole,at the depth of 11.66 km.The Kola Super-deep borehole(SG-3)(henceforth referred as KSDB)is located in the northwest of the Kola Peninsula in the northern frame of the Pechenga structure,Russia.It was drilled in the north-eastern part of the Baltic Shield(69о5’N,30о44’E)and reached a depth of 12.262 km.It has been drilled in the northern limb of the Pechenga geosyncline composed of rhythmically inter-bedded volcanogenic and tuffaceous-sedimentary strata extending to the NW at 300°–310°and dipping to SW at angles of 30°–50°.The SG-3 geological section is represented by two complexes–Proterozoic and Archaean.Amphibolite facies is dominant in the depth region from 6000 m to 12,000m to the deepest.The Raman spectra of the sample reveal abundant presence of plagioclase and amphiboles.The most distinct Raman peak in this study indicates the tremolite-ferro-actinolite rich enrichment of the borehole samples at this depth corroborating earlier conventional petrographic studies.展开更多
Objective:To investigate three tropical plant materials - clove seeds[Syzygium aromalicum(S. aromaticum)],bitter kola fruits[Garcinia kola(G.kola)]and tobacco leaves(Nicotiana species) as potential targeted killers of...Objective:To investigate three tropical plant materials - clove seeds[Syzygium aromalicum(S. aromaticum)],bitter kola fruits[Garcinia kola(G.kola)]and tobacco leaves(Nicotiana species) as potential targeted killers of Streptococcus mutans(S.mutatis),a cavity-causing bacterium(gram-positive, facultative anaerobe) that resides in a multispecies microbial community(dental plaque) for the treatment of dental caries(tooth decay).Methods:Thirty one(31) teeth samples were collected from patients with obvious signs of tooth decay(swollen gum,weak or fallen tooth,etc.) using sterile swab sticks.These samples were collected from two major denial clinics in Nsukka, Enugu State,Nigeria and investigated by spread inoculation onto sterile blood agar and Mueller Hinton agar(MHA) respectively and incubated at 37℃for 24 h.The discrete colonies obtained were further re-inoculated onto sterile Mitis salivarius agar(MSA) plates and incubated as above. The isolates were characterized by gram staining and calalase lesl.Tobacco leaves,clove seeds and bitter kola fruits were ground into powder,extracted with three different solvents(n-hexane, hot water and ethanol),filtered,dried and stored in clean containers,corked and kept until used. The plant extracts were investigated for phytochemistry,minimum inhibitory concentration(MIC), minimum cidal concentration(MCC)and compared with some conventional antibiotics commonly used against tooth decay.Antibiotic sensitivity test was also carried out.The results were statistically analyzed.Results:The extracts showed varied phytochemical composition but most abundantly the flavonoids.Our result also shows that females(16) have more tooth decay than males(15) and that 16 samples were very bloody while 15 were slightly bloody.The microbial characterization showed that 18 samples were catalase-positive indicating the presence of S. mutans while 13 were catalase-negative suspected to be Staphylococcus spp.The Gram reaction confirmed 13 Gram-negative and 18 Gram-positive organisms.The n-hexane extract had the best antimicrobial activity followed by the ethanol and lastly hot water.MIC showed that n-hexane clove extract had the largest inhibition zone diameter,followed by bitter kola extract and lastly tobacco extract.The antibiotic sensitivity test credited ciprofloxacin the best because it exhibited broad spectrum of action.Conclusions:Since the n-hexane extract of clove seeds demonstrated preferential growth-inhibitory activity against the causal cariogenic pathogens(S.mutans) in dental caries,we therefore,report here that clove extract be henceforth considered as a potential ingredient in toothpaste preparation.展开更多
Objective:To assess the neuroprotective effects of aqueous extract of Garcinia kola on neurotoxin administered malnourished mice adopting histological procedure.Methods:The study was carried out using thirty-two adult...Objective:To assess the neuroprotective effects of aqueous extract of Garcinia kola on neurotoxin administered malnourished mice adopting histological procedure.Methods:The study was carried out using thirty-two adult malnourished mice which were randomly assigned into four groups(n=8):A,B,C and D.Group A served as control,while the other groups served as the experimental groups.Animals in group A were fed malnourished diet ad libitum and given water liberally.Animals in group B were administered with 3-Nitropropionic acid(3-NP)(neurotoxin)only at 20 rag/kg body weight,group C were given only Garcinia kola extracts,and group D were pre-treated with Garcinia kola extracts at 200 mg/kg for seven days prior to administration of neurotoxin at 20 mg/kg body weight.After three days of neurotoxins administration in the relevant groups,the brains were excised and fixed in formal calcium for histological processing.Results:The study showed that hippocampal and cerebellar neurons of animals in group B exhibited some cellular degeneration and blood vessel blockage,which were not seen in groups A,C and D.Cresyl violet staining was least intense in group B than in groups A,C and D.Despite the fact that animals in group D has equal administration of 3-Nitropropionic acid concentration,there were no traces of neural degeneration as it was evidenced in group B.Conclusions:It is concluded that Garcinia kola has protective effects on the neurons of the hippocampus and cerebellum of malnourished mice.展开更多
Kola (Cola nitida) is an important economic cash crop for many West and Central African countries. It has several medicinal uses in the pharmaceutical industries and also plays a major role in traditional marriages am...Kola (Cola nitida) is an important economic cash crop for many West and Central African countries. It has several medicinal uses in the pharmaceutical industries and also plays a major role in traditional marriages among Islamic communities across West and Central Africa. The crop is extensively cultivated in Nigeria and Ghana. However, it exhibit signs of total and partial sterility as well as self incompatibility when propagated from seeds in most cases. Therefore, grafting is seen as a method of choice in addressing the problem stated above. Though grafting accounts for some degree of success, there is the need to assess genotypic and physiological factors that account for high or low grafting success. Genetic and physiological factors (such as rootstock age) affecting grafting success and growth in kola (C. nitida) were investigated in two separate experiments. In experiment I720 kola seedlings were raised from unselected kola nuts and sown at two monthly intervals. Four groups of seedlings (180/group) i.e. 6, 8, 10 and 12 months old were thus produced. Three different scions (A1, A12 and JB1) measuring (5-10 cm) were grafted onto the four age groups of rootstocks, namely, 6, 8, 10 and 12 months. Experiment II consisted of 540 seedlings raised from three main crosses (JX1/9 × JX1/11 * B1/142 × B1/151, JX1/9 × JX1/11 * B2/177 × B2/156 and JX1/9 × JX1/11 * GX1/46 × GX1/53). Grafting was done after six months using the same set of scions as described in experiment I. Experimental design used was 3 × 4 and 3 × 3 factorial designs in completely randomised design with three replicates for experiment I and II respectively. The fixed effects were the different genotype and age of rootstock at grafting whilst the response variable was the percentage of successful grafting two months as well as growth at six monthly intervals. Results from the study showed that grafting onto 6 months old stocks gave the highest percentage success and growth of grafts followed by 8, 10 and 12 months old rootstock in that order in both trial years. The study revealed also a significant rootstock and scion interaction (P < 0.05). We conclude that successful grafting in kola depends on rootstock genotype such as JX1/9 × JX1/11 * GX1/46 × GX1/53 and has been proven suitable for use in future kola propagation studies. Nonetheless, suitable rootstock with high grafting success does not translate into vigorous scion growth.展开更多
Objectives: Garcinia kola seeds (EAgk) (Clusiaceae) contain coagulant components use to pretreat aquaculture wastewater in Nigeria. This work was undertaken to assess the effects of EAgk on blood coagulation because o...Objectives: Garcinia kola seeds (EAgk) (Clusiaceae) contain coagulant components use to pretreat aquaculture wastewater in Nigeria. This work was undertaken to assess the effects of EAgk on blood coagulation because of its contents. Methods: Five groups of four rats of both sexes (200 ± 5 g) received orally distilled water, phytomenadione (15 mg/kg b.w.) and garcinia kola seeds extract (250, 500 and 1000 mg/kg b.w.) for four days and after this period, bleeding time was measured by tail hemorrhage model. Activated partial thromboplastin time (aPTT) and platelet count were determined by coagulometer and hematological analyzer respectively. Blood red cells protection of EAgk was measured by the methods of 2,2’-Azobis(2-methylpropionamidine) dihydrochloride (AAPH)-induced hemolysis and inhibition of 2,2-Diphenyl-1-picryl hydrazyl (DPPH) radical and hydrogen peroxide. Results: EAgk at 1000 mg/kg b.w. induced a significant decrease in bleeding time from 420 ± 27.3 s to 157.5 ± 18.9 s. The platelet count of group of rat treated with EAgk (1000 mg/kg b.w.) increased significantly (p 0.05, n = 4). EAgk inhibited hemolysis, DPPH radical and hydrogen peroxide with IC50 values of 1.02 ± 0.2;3.2 × 10?2 ± 0.12 and 1.01 ± 0.5 mg/mg respectively. Conclusions: EAgk exhibits hemostatic effects, which could justify the presence of coagulant components in the extract. Erythrocytes’ protective activity of Garcinia kola seeds may be due to free radicals and hydrogen peroxide inhibition.展开更多
Tropical forests contain many tree species that have supplied edible fruits for centuries.These fruits have contributed to human diets due to their richness in nutrients,vitamins,minerals,antioxidants and their low an...Tropical forests contain many tree species that have supplied edible fruits for centuries.These fruits have contributed to human diets due to their richness in nutrients,vitamins,minerals,antioxidants and their low antinutrients content.We investigated the antioxidant,nutritional and anti-nutritional composition of Garcinia kola and Chrysophyllum albidum fruit parts.The nutritional,anti-nutritional and antioxidant compositions differed depending on the fruit part.Irrespective of fruit part,moisture content was high（72–93 %）.While the edible part（fruit pulp） of C.albidum proved a better source of protein（4）,fibre（17 %） and fat（2 %）,the seed kernel was a better source of ash（2 %） and carbohydrate（15 %）.Carbohydrate（22 %）,protein（2 %）,fat（1 %） and fibre（3 %） were higher in G.kola seed kernel（edible part） than in the pulp and pod.Anti-nutrient content in G.kola and C.albidum fruits was low,indicating that their consumption would not pose nutritional or health problems.The antioxidant compositions（especially phenolic content（10–21 mg g-1） and DPPH（1,1-diphenyl–2 picrylhydrazyl）（26–55 %）） of C.albidum fruit pulp and G.kola seed kernel were high,implying that they could be good sources of natural antioxidants and could be used as supplements in food manufacturing.展开更多
The Early Paleoproterozoic Monchegorsk Complex is exposed over an area of 550 km;and comprises two layered mafite–ultramafite intrusions:the Monchepluton of ultramafic and mafic rocks and the predominantly gabbroid
Kola nut is a native stimulant which is commonly chewed in many West African cultures, individually or in a group setting. It is often used ceremonially and to honour vip. Phytochemical analysis and antibacterial sc...Kola nut is a native stimulant which is commonly chewed in many West African cultures, individually or in a group setting. It is often used ceremonially and to honour vip. Phytochemical analysis and antibacterial screening of red and white Cola nitida (kola nut) extracts were evaluated using qualitative and quantitative method. Thin layer chromatography (TLC) was used to evaluate the phenolic content. Antibacterial screening was done using agar well diffusion method against odontopathogens;(Lactobacillus sp., Corynebacterium haemolyticum, Proteus vulgans, Bacillus lentus, Streptococcus anginosus and Pseudomonas aeruginosa) obtained from stock cultures. Phytochemical screening revealed the presence of alkaloids, flavonoids, saponin, tannins, glycoside, steroids, volatile oil and balsams. Higher content of alkaloids, saponin and glycoside was obtained in the aqueous extract than the methanol for both red and white kola nut. The results of TLC analysis revealed the presence of quercetin and coumarin in red kola and keamferol and coumarin in white kola respectively. The result of antibacterial activity of red C. nitida showed a zone of inhibition of 18 mm and 23 mm at 60 mg/ml for aqueous extract on Proteus vulgans and Streptococcus anginosus. Similarly white kola inhibited the growth of S. anginosus at 90 mg/ml with a zone of 18 mm. Methanol extract of red kola inhibited the growth of P. vulgans and S. anginosus at 60 mg/ml with a zone of 16 mm and 20 mm respectively. Acetone and ethyl acetate extracts of both red and white kola nut did not show any activity against the tested organism at all concentrations. The results obtained indicate that C. nitida which posses promising chemotherapeutic and antibacterial potentials respectively that could be useful against odontopathogens. The study may serve as baseline for further studies.展开更多
The purpose of this study is to determine the morphological diversity and distribution of Garcinia kola Heckel (Clusiaceae) in two preferential agro-ecological growth areas in Cote d’Ivoire, for the sustainable manag...The purpose of this study is to determine the morphological diversity and distribution of Garcinia kola Heckel (Clusiaceae) in two preferential agro-ecological growth areas in Cote d’Ivoire, for the sustainable management of the species. Ninety-four (94) trees of G. kola were sampled in Affery (south) and Biankouma (west) and characterized on the basis of 13 quantitative characteristics of the fruit, the general appearance of a plant, leaves and seeds. This study revealed the existence of very significant variability and differences within the trees sampled for most characteristics. Very strong correlations were found among the characteristics of the fruits. On the basis of these characteristics, it emerged that the fruits of the Biankouma area are larger than those of Affery. Multivariate analyses show that diversity is structured with tree distribution into four distinct groups based on the following discriminating characteristics: fruit height (Hfr), leaf width (largF), seed mass (Mgr) and trunk diameter (Dm). These parameters can be used as a basis for selecting and maintaining the high variability of G. kola. Analysis of the geographical distribution of trees, based on the nearest neighbour model, revealed an aggregate distribution in both areas.展开更多
The treatment and management of diabetes mellitus has been a challenge to achieve a total cure using conventional drugs. Hypoglycemic and hypolipidemic effects of bitter kola (<em>Garcinia kola</em>) seed ...The treatment and management of diabetes mellitus has been a challenge to achieve a total cure using conventional drugs. Hypoglycemic and hypolipidemic effects of bitter kola (<em>Garcinia kola</em>) seed extract on alloxan-induced diabetic rats were studied as a local product. Albino rats weighing about 200 g were investigated in groups using 200 - 800 mg/kg weight of bitter kola seed extract and the sample examined for glucose and lipid profiles using enzymatic methods and statistically analyzed using statistical package for social science (SPSS) windows, version 20.0. The results were expressed as the Mean ± SD. The results for the serum glucose and low density lipoprotein cholesterols (LDL-C) concentrations of untreated diabetic rats, and treated rats showed a significant (P < 0.05) progressive decrease from 200 - 800 mg/kg when compared to the control rats. Total cholesterol (TC) and triglycerides (TG) concentrations for untreated diabetic rats, and treated rats showed increase in concentration which was not significant (P > 0.05) from 200 - 800 mg/kg weight when compared with the controls. High density lipoproteins (HDL-C) concentrations for untreated diabetic rats, and treated rats showed increase in concentration which was significant (P < 0.05) from 200 - 800 mg/kg weight when compared with the controls. This study confirms the hypoglycemic and hypolipidemic effects of bitter kola (<em>Garcinia kola</em>) seed extract.展开更多
This paper discusses the vein rocks located in the central part of Khibina Mts.. These rocks are located on the border of two zones： ore and external. In the ore, zone is present titanite-nepheline bodies whilst in t...This paper discusses the vein rocks located in the central part of Khibina Mts.. These rocks are located on the border of two zones： ore and external. In the ore, zone is present titanite-nepheline bodies whilst in the outer zone are massive-syenites ＂khibinites＂. The veins can be divided into： mikrosyenites, melteigites and other rock types （e.g., tinguaites）. The results of LA-ICP MS （laser ablation of inductively coupled plasma mass spectrometry） indicate that these rocks are associated with deep zones which formed as a result of injection of primary magma and contamination of fluids during migration, where there have hydrothermal processes. Rock-forming minerals, their corrosion and accessory minerals indicate these processes, too.展开更多
Crude extracts of neem and bitter kola seeds were evaluated for inhibition of the growth of aflatoxin-producing fungi (Aspergillus flavus and A. parasiticus) in Zea mays L. Different concentrations of the methanolic a...Crude extracts of neem and bitter kola seeds were evaluated for inhibition of the growth of aflatoxin-producing fungi (Aspergillus flavus and A. parasiticus) in Zea mays L. Different concentrations of the methanolic and ethanolic extracts of the test plants were tested individually and in combination against A. flavus and A. parasiticus. Inhibition of A. flavus using methanolic extracts of G. kola, neem and combination of (G. kola and neem) seeds revealed that inhibition was highest in G. kola (77.5) at 10% concentration, and lowest in neem (35.1) at 2.5% concentration. Statistical analysis showed a significant difference at 5%. Inhibition of A. flavus using ethanolic extracts of G. kola, neem and combination of G. kola and neem seeds revealed that inhibition was highest in the combination of (80.4) at 10% concentration and lowest in G. kola (31.4) at 2.5% concentration. Using methanolic extracts of G. kola, neem and combination against A. parasiticus showed that inhibition was highest in G. kola and combination of seeds (54.8) at 10% concentration and lowest in neem seeds (30.5) at 5.0% concentration. The percentage inhibition of A. parasiticus using ethanolic extracts of G. kola, neem and combination revealed that inhibition was highest in G. kola (79.5) at 10% concentration and lowest in the combination of G. kola and neem seeds (26.6) at 2.5% concentration. These results will be important in planning a management strategy against A. flavus and A. parasiticus and other fungi associated with spoilage of stored products.展开更多
This paper deals with the effect of blended cement and natural latex copolymer to static and dynamic properties of polymer modified concrete. The polymer was used copolymer of natural latex methacrylate (KOLAM) and co...This paper deals with the effect of blended cement and natural latex copolymer to static and dynamic properties of polymer modified concrete. The polymer was used copolymer of natural latex methacrylate (KOLAM) and copolymer of natural latex styrene (KOLAS) with composition of 1%, 5%, and 10% w/w of weight of blended cement in concrete mixture. They are tested for compressive strength, flexural strength, splitting tensile strength, and modulus elasticity for static analysis, and impact load and energy dissipation profile for dynamic analysis. The result shows that KOLAM with concentration 1% give better performance in static and dynamic properties. The KOLAM 1% gives improvement in flexural strength, splitting tensile strength and modulus elasticity about 4%, 13% and 3% compared to normal concrete. And for dynamic properties, KOLAM 1% could reduce impact load up to 35% and improve energy dissipation capacity about 45% compared to normal concrete. The concentration of KOLAM higher than 1% resulting negative effect to static and dynamic properties, except modulus of elasticity. For KOLAS, there were no positive trends of static and dynamic properties.展开更多
Bisphenol A (BPA), a toxicant which can leach into food from plastic containers, is reported to induce neurotoxicity among others via oxidative mechanisms. However, antioxidant compounds have been suggested to mitigat...Bisphenol A (BPA), a toxicant which can leach into food from plastic containers, is reported to induce neurotoxicity among others via oxidative mechanisms. However, antioxidant compounds have been suggested to mitigate BPA-induced toxicities. Garcinia kola (GK) and its bioactive compound, kolaviron, are well-established natural antioxidants, which can exert protective effects against BPA-induced toxicities. This study was designed to investigate the likely mitigating effect of GK and kolaviron on BPA-induced memory impairment and hippocampal neuroinflammation in male Wistar rats. Thirty-five rats were equally grouped and treated as follows: I and II received distilled water and corn oil, respectively at 0.2 mL, while III - VII received BPA (50 mg/kg), BPA + GK (200 mg/kg), BPA + kolaviron (200 mg/kg), GK and kolaviron, respectively for 28 days p.o. Thereafter, behavioral studies were done using the Novel Object Recognition and Y maze tests. Subsequently under anaesthesia, the hippocampus in each animal was dissected out, homogenized and analysed for malondialdehyde, superoxide dismutase, catalase, reduced glutathione, glutathione transferase, nitrites, interleukin-6, tumour necrosis factor-α, acetylcholinesterase, glutamate acid decarboxylase, and arginase activity. Data were analyzed by ANOVA and Tukey Post-hoc test at p p Garcinia kola and Kolaviron mitigate bisphenol A-induced memory impairment and neuroinflammation via antioxidant potentiation and neurotransmitter balance.展开更多
This study was carried out in 2022 at the Itato agriculture community estate of fish hatchery in eastern Senegal with the aim of finding an alternative method to 17-α-methyl testosterone (MT) by using Garcinia kola ...This study was carried out in 2022 at the Itato agriculture community estate of fish hatchery in eastern Senegal with the aim of finding an alternative method to 17-α-methyl testosterone (MT) by using Garcinia kola “Bitter kola” powder to obtain Oreochromis niloticus male sex populations. 1800 fry of average size between 0.01 and 0.02 g were distributed in 12 aboveground tanks of 1 m3 each at a rate of 150 individuals/tank, following 6 duplicate treatments. The negative (B1 and B2) and positive (B3 and B4) control diets, to which between 0 and 60 mg/kg of 17alpha-methyl testosterone had been added respectively, were mixed with industrial feed containing 40% protein;the tank diets (B5 and B6), (B7 and B8), (B9 and B10) and (B11 and B12) contained 10 g, 20 g, 30 g and 40 g of Garcinia kola powder respectively for 1 kg of industrial feed con-taining 40% protein. These different treatments resulted in high proportions of males in the order of 97.03%;98.09% for the hormone and proportions of 94.03%;93.26% for 20 g of Garcinia kola extracts. In terms of weight growth, the best average weights for the hormone and Garcinia kola were 0.896 g and 0.980 g respectively. With regard to fish survival, the following results were recorded: 95.53% and 94.56% respectively for additions of 20 g and 30 g of Garcinia kola extracts to the feed supplied to the fish. On the other hand, a significant difference in the mortality rate of 35% and 5% respectively for the conventional hormone and 20 g of Garcinia kola extracts was observed. To conclude the study, it is recommended that further studies be carried out to determine the quality of the flesh, their life stages and the profile of the amino acids present in their proteins.展开更多
Kola nuts were regularly chewed by West Africans and Beninese in particularly. The aim of this study was to investigate nutritional and anti-nutrient content of three Benin’s kola nuts (Cola nitida, Cola acuminata an...Kola nuts were regularly chewed by West Africans and Beninese in particularly. The aim of this study was to investigate nutritional and anti-nutrient content of three Benin’s kola nuts (Cola nitida, Cola acuminata and Garcinia kola). Proximate composition of the three species of kola nuts was assessed using standard analytical AOAC methods. Phenolics and flavonoids contents were determined by Folin-Ciocalteu and aluminum trichloride methods, respectively. Mineral composition was determined by Atomic Absorption Spectrometry method. Free and total amino acids were separated and quantified by HPLC. Protein content of the three kola nuts ranges from 4.95% (G. kola) to 10.64% (C. acuminata) whereas fat content ranges from 0.2 ± 0.00 (C. nitida) to 2.5 ± 0.42 (G. kola). Total phenolics abounded (2444.96 ± 81.56 μg Eq AG/100g) in C. acuminata, while flavonoids predominated (561.69 ± 22.10 μgEqQ/100g) in G. kola. The three species are a good source of magnesium and a copper provider was lowest in C. nitida (0.59 ± 0.08 mg/g) and in C. acuminata (0.65 ± 0.02 mg/g). The dominant total essential amino acids were threonine (C. acuminata) and methionine (C. acuminata and G. kola), while the predominant non-essential total amino acids according to species were arginine (C. nitida and G. kola), proline (C. acuminata) and cysteine (G. kola). For the anti-nutrients factors, saponins were in great proportion (8.33% ± 0.25%), while the oxalates were in small proportion (0.44% ± 0.04%). The three species have an interesting nutritional composition, but these seeds have the relatively lowest amino acids content.展开更多
Inland fishing predominates in the Kedougou region, which has no coastline. This type of fishing does not yet meet the local population’s demand for fish products. In response to this concern, a Community Agricultura...Inland fishing predominates in the Kedougou region, which has no coastline. This type of fishing does not yet meet the local population’s demand for fish products. In response to this concern, a Community Agricultural Estate housing an integrated fish farm was set up in the commune of Bandafassi, in the village of Itato. Since its creation, this production unit has been faced with the problem of sourcing high-quality, low-cost, monosex male Oreochromis niloticus fry. In order to overcome this constraint, the present research focuses on the contribution of Garcinia kola to the productivity and economic profitability of the Itato farm. The aim of the research is to assess fish production in the experimental set-up and the production costs of tilapia in a controlled environment. The comparative study of the various production factors shows disparities only in the input factor, where scenarios 2 and 3 use additional products. These are 17-α-methytestosterone for scenario 2 and Garcinia kola for scenario 3. These products significantly interfere with fish production, with a fairly high mortality rate for scenario 2 (25% for two production cycles/ cohort2 (B5, B6, B7 and B8) treated with 17-α-methytestosterone). As for scenarios 1 and 3, mortalities are 5% with or without recourse to additional products (G. kola). In addition, average fish production for the three (03) scenarios is estimated at 28687.5 kg/2 cycles. It varies from one scenario to another, i.e. 30937.5 kg/2 cycles for scenarios 1 and 3 and 24187.5 kg/2 cycles for scenario 2. It is therefore higher in scenarios 1 and 3 than in scenario 2. This difference is due to the fairly large losses of individuals in scenario 2. Furthermore, the analysis of the profit and loss accounts for tilapia production varies from one scenario to another depending on the type of farm: 476 Franc CFA for scenario 1, 610 Franc CFA for scenario 2 and 472 Franc CFA for scenario 3 (F CFA = franc of the French Colonies of Africa). The Average operating income for all the fish farming units is 34,726,142 Franc CFA. The highest (41,638,075 Franc CFA) and lowest (29,281,075 Franc CFA) ERs were observed in scenarios 3 and 2 respectively. It was 33,259,275 Franc CFA for scenario 1. The difference between the NERs of the three scenarios is more or less significant in terms of results. The operating result (OR) is positive in all 3 scenarios in our study. However, the scenario 3 system generates a higher rate of return (the ratio between an income and the capital employed to obtain that income) (74%) than that generated by the scenario 1 system (69%). As for the scenario 2 system, it generates a lower financial return than the two previous systems (67%). Above all, this work made it possible to construct an approach that would make it possible to answer such a question by relying successively on various methods: a typology, according to the production factors involved in the operation of the Community Agricultural Estate fish farm.展开更多
Eurogranites Arctic 2009 followed up a series of Eurogranites annual meetings,carried out in the Phanerozoic granite terrains of central and southern Europe since 1971.In 1996 the study turned to the Precambrian grani...Eurogranites Arctic 2009 followed up a series of Eurogranites annual meetings,carried out in the Phanerozoic granite terrains of central and southern Europe since 1971.In 1996 the study turned to the Precambrian granitoids of the Fennoscandian Shield at the Eurogranites conference in Norway and was continued at the Eurogranites 2005 in Finland.Eurogranites 2009 extended the area of investigation all the more,having overlapped alkaline massifs of the Russian Kola Peninsula.The excursion was jointly convened by specialists of the University of Helsinki,Finnish Museum of Natural History(Finland)and Geological Institute of the Kola Science Centre of the Russian Academy of Sciences(Russia).Participants,21 in total,were predominantly from Europe(Italy,Germany,Great Britain,Ireland,Belgium,Portugal),but there were also attendees from USA,Estonia,Slovakia,Finland,Norway.展开更多
Background:Garcinia kola is an indigenous multipurpose tree species commonly found in the tropical rain forest zone of West and Central Africa.Providing economic,ecological,and socio-cultural benefits for people,they ...Background:Garcinia kola is an indigenous multipurpose tree species commonly found in the tropical rain forest zone of West and Central Africa.Providing economic,ecological,and socio-cultural benefits for people,they have potentials to improve the regional and local income generation to the farmers but the cultivation of the species is very limited in Nigeria.Methods:The study investigated cultivation and farmers’perceptions on the impacts of climate change on goods and services provided by G.kola in Nigeria.Structured questioners and interviews were used.The data obtained was analyzed using descriptive and inferential statistic such as frequency,percentage,chi-square,and multinomial logit regressions with SPSS Version 20 and R software Version 3.1.0.Results:The results show that farmers are presently not cultivating G.kola,and most of the available stands were inherited from grandparents.The farmers still believe it is only God that can make G.kola to germinate;however,information about the new improved methods of raising G.kola was not spread across farmers’communities.Over 93%of these farmers were not aware of these new methods,and the only means they raise the species is by picking the wildlings that regenerate naturally close to mother tree and are rarely found.The finding also shows that farmers are well aware of climate change and its impact on crop productivity is not clear to them.The result shows that five explanatory variables(age,gender,marital status,education level,household size and primary occupation)are the main factors significantly influencing farmers’perception of climate change and the cultivation of the G.kola.During interview section,the farmers reported variability of Harmattan season influences fruit production of the species;according to them,increase in Harmattan season usually leads to increase in fruiting of G.kola.Conclusions:Based on our findings,all the 215 respondent interviewed agree that climatic variability influences the availability of G.kola which will in turn have significant effects on the goods and services provided to the people.Efforts should be made at educating the rural farmers on propagation possibilities,potential ecosystem services,and the impact of climate change on multiple-purpose agroforestry species.展开更多
文摘Insecticidal effects of different doses of the dust and methanol extracts of Garcinia kolae on Callosobruchus maculatus and Sitophilus zeamais were tested. The dust had no significant effect on the two insects, none of them died even at 3 d after treatment. The methanol extracts, however, had rapid lethal effects on both C. maculatus and S. zeamais. The mortality of C. maculatus by the lowest concentration of methanol extracts ranged from 95%-100% whereas in S. zeamais, the mortality ranged from 87.5%-100% and 70%-100% in concentrations of 1 g extract＋3 ml methanol and 1 g extract＋5 ml methanol, respectively, from 24 to 48 h. The least concentration of 1 g extract＋l 5 ml methanol had no significant lethal effect on Sitophilus zeamais.
基金National Institute of advanced Studies (NIAS)Indian National Science Academy (INSA) for the support in under the INSA senior Scientist scheme.
文摘We present here for the first time,the Raman and infrared spectroscopic investigation of amphiboles from the World's deepest borehole,the Kola super-deep borehole,at the depth of 11.66 km.The Kola Super-deep borehole(SG-3)(henceforth referred as KSDB)is located in the northwest of the Kola Peninsula in the northern frame of the Pechenga structure,Russia.It was drilled in the north-eastern part of the Baltic Shield(69о5’N,30о44’E)and reached a depth of 12.262 km.It has been drilled in the northern limb of the Pechenga geosyncline composed of rhythmically inter-bedded volcanogenic and tuffaceous-sedimentary strata extending to the NW at 300°–310°and dipping to SW at angles of 30°–50°.The SG-3 geological section is represented by two complexes–Proterozoic and Archaean.Amphibolite facies is dominant in the depth region from 6000 m to 12,000m to the deepest.The Raman spectra of the sample reveal abundant presence of plagioclase and amphiboles.The most distinct Raman peak in this study indicates the tremolite-ferro-actinolite rich enrichment of the borehole samples at this depth corroborating earlier conventional petrographic studies.
文摘Objective:To investigate three tropical plant materials - clove seeds[Syzygium aromalicum(S. aromaticum)],bitter kola fruits[Garcinia kola(G.kola)]and tobacco leaves(Nicotiana species) as potential targeted killers of Streptococcus mutans(S.mutatis),a cavity-causing bacterium(gram-positive, facultative anaerobe) that resides in a multispecies microbial community(dental plaque) for the treatment of dental caries(tooth decay).Methods:Thirty one(31) teeth samples were collected from patients with obvious signs of tooth decay(swollen gum,weak or fallen tooth,etc.) using sterile swab sticks.These samples were collected from two major denial clinics in Nsukka, Enugu State,Nigeria and investigated by spread inoculation onto sterile blood agar and Mueller Hinton agar(MHA) respectively and incubated at 37℃for 24 h.The discrete colonies obtained were further re-inoculated onto sterile Mitis salivarius agar(MSA) plates and incubated as above. The isolates were characterized by gram staining and calalase lesl.Tobacco leaves,clove seeds and bitter kola fruits were ground into powder,extracted with three different solvents(n-hexane, hot water and ethanol),filtered,dried and stored in clean containers,corked and kept until used. The plant extracts were investigated for phytochemistry,minimum inhibitory concentration(MIC), minimum cidal concentration(MCC)and compared with some conventional antibiotics commonly used against tooth decay.Antibiotic sensitivity test was also carried out.The results were statistically analyzed.Results:The extracts showed varied phytochemical composition but most abundantly the flavonoids.Our result also shows that females(16) have more tooth decay than males(15) and that 16 samples were very bloody while 15 were slightly bloody.The microbial characterization showed that 18 samples were catalase-positive indicating the presence of S. mutans while 13 were catalase-negative suspected to be Staphylococcus spp.The Gram reaction confirmed 13 Gram-negative and 18 Gram-positive organisms.The n-hexane extract had the best antimicrobial activity followed by the ethanol and lastly hot water.MIC showed that n-hexane clove extract had the largest inhibition zone diameter,followed by bitter kola extract and lastly tobacco extract.The antibiotic sensitivity test credited ciprofloxacin the best because it exhibited broad spectrum of action.Conclusions:Since the n-hexane extract of clove seeds demonstrated preferential growth-inhibitory activity against the causal cariogenic pathogens(S.mutans) in dental caries,we therefore,report here that clove extract be henceforth considered as a potential ingredient in toothpaste preparation.
文摘Objective:To assess the neuroprotective effects of aqueous extract of Garcinia kola on neurotoxin administered malnourished mice adopting histological procedure.Methods:The study was carried out using thirty-two adult malnourished mice which were randomly assigned into four groups(n=8):A,B,C and D.Group A served as control,while the other groups served as the experimental groups.Animals in group A were fed malnourished diet ad libitum and given water liberally.Animals in group B were administered with 3-Nitropropionic acid(3-NP)(neurotoxin)only at 20 rag/kg body weight,group C were given only Garcinia kola extracts,and group D were pre-treated with Garcinia kola extracts at 200 mg/kg for seven days prior to administration of neurotoxin at 20 mg/kg body weight.After three days of neurotoxins administration in the relevant groups,the brains were excised and fixed in formal calcium for histological processing.Results:The study showed that hippocampal and cerebellar neurons of animals in group B exhibited some cellular degeneration and blood vessel blockage,which were not seen in groups A,C and D.Cresyl violet staining was least intense in group B than in groups A,C and D.Despite the fact that animals in group D has equal administration of 3-Nitropropionic acid concentration,there were no traces of neural degeneration as it was evidenced in group B.Conclusions:It is concluded that Garcinia kola has protective effects on the neurons of the hippocampus and cerebellum of malnourished mice.
文摘Kola (Cola nitida) is an important economic cash crop for many West and Central African countries. It has several medicinal uses in the pharmaceutical industries and also plays a major role in traditional marriages among Islamic communities across West and Central Africa. The crop is extensively cultivated in Nigeria and Ghana. However, it exhibit signs of total and partial sterility as well as self incompatibility when propagated from seeds in most cases. Therefore, grafting is seen as a method of choice in addressing the problem stated above. Though grafting accounts for some degree of success, there is the need to assess genotypic and physiological factors that account for high or low grafting success. Genetic and physiological factors (such as rootstock age) affecting grafting success and growth in kola (C. nitida) were investigated in two separate experiments. In experiment I720 kola seedlings were raised from unselected kola nuts and sown at two monthly intervals. Four groups of seedlings (180/group) i.e. 6, 8, 10 and 12 months old were thus produced. Three different scions (A1, A12 and JB1) measuring (5-10 cm) were grafted onto the four age groups of rootstocks, namely, 6, 8, 10 and 12 months. Experiment II consisted of 540 seedlings raised from three main crosses (JX1/9 × JX1/11 * B1/142 × B1/151, JX1/9 × JX1/11 * B2/177 × B2/156 and JX1/9 × JX1/11 * GX1/46 × GX1/53). Grafting was done after six months using the same set of scions as described in experiment I. Experimental design used was 3 × 4 and 3 × 3 factorial designs in completely randomised design with three replicates for experiment I and II respectively. The fixed effects were the different genotype and age of rootstock at grafting whilst the response variable was the percentage of successful grafting two months as well as growth at six monthly intervals. Results from the study showed that grafting onto 6 months old stocks gave the highest percentage success and growth of grafts followed by 8, 10 and 12 months old rootstock in that order in both trial years. The study revealed also a significant rootstock and scion interaction (P < 0.05). We conclude that successful grafting in kola depends on rootstock genotype such as JX1/9 × JX1/11 * GX1/46 × GX1/53 and has been proven suitable for use in future kola propagation studies. Nonetheless, suitable rootstock with high grafting success does not translate into vigorous scion growth.
文摘Objectives: Garcinia kola seeds (EAgk) (Clusiaceae) contain coagulant components use to pretreat aquaculture wastewater in Nigeria. This work was undertaken to assess the effects of EAgk on blood coagulation because of its contents. Methods: Five groups of four rats of both sexes (200 ± 5 g) received orally distilled water, phytomenadione (15 mg/kg b.w.) and garcinia kola seeds extract (250, 500 and 1000 mg/kg b.w.) for four days and after this period, bleeding time was measured by tail hemorrhage model. Activated partial thromboplastin time (aPTT) and platelet count were determined by coagulometer and hematological analyzer respectively. Blood red cells protection of EAgk was measured by the methods of 2,2’-Azobis(2-methylpropionamidine) dihydrochloride (AAPH)-induced hemolysis and inhibition of 2,2-Diphenyl-1-picryl hydrazyl (DPPH) radical and hydrogen peroxide. Results: EAgk at 1000 mg/kg b.w. induced a significant decrease in bleeding time from 420 ± 27.3 s to 157.5 ± 18.9 s. The platelet count of group of rat treated with EAgk (1000 mg/kg b.w.) increased significantly (p 0.05, n = 4). EAgk inhibited hemolysis, DPPH radical and hydrogen peroxide with IC50 values of 1.02 ± 0.2;3.2 × 10?2 ± 0.12 and 1.01 ± 0.5 mg/mg respectively. Conclusions: EAgk exhibits hemostatic effects, which could justify the presence of coagulant components in the extract. Erythrocytes’ protective activity of Garcinia kola seeds may be due to free radicals and hydrogen peroxide inhibition.
基金supported by Alexander von Humboldt Foundation(Av H),Bonn,Germany
文摘Tropical forests contain many tree species that have supplied edible fruits for centuries.These fruits have contributed to human diets due to their richness in nutrients,vitamins,minerals,antioxidants and their low antinutrients content.We investigated the antioxidant,nutritional and anti-nutritional composition of Garcinia kola and Chrysophyllum albidum fruit parts.The nutritional,anti-nutritional and antioxidant compositions differed depending on the fruit part.Irrespective of fruit part,moisture content was high（72–93 %）.While the edible part（fruit pulp） of C.albidum proved a better source of protein（4）,fibre（17 %） and fat（2 %）,the seed kernel was a better source of ash（2 %） and carbohydrate（15 %）.Carbohydrate（22 %）,protein（2 %）,fat（1 %） and fibre（3 %） were higher in G.kola seed kernel（edible part） than in the pulp and pod.Anti-nutrient content in G.kola and C.albidum fruits was low,indicating that their consumption would not pose nutritional or health problems.The antioxidant compositions（especially phenolic content（10–21 mg g-1） and DPPH（1,1-diphenyl–2 picrylhydrazyl）（26–55 %）） of C.albidum fruit pulp and G.kola seed kernel were high,implying that they could be good sources of natural antioxidants and could be used as supplements in food manufacturing.
文摘The Early Paleoproterozoic Monchegorsk Complex is exposed over an area of 550 km;and comprises two layered mafite–ultramafite intrusions:the Monchepluton of ultramafic and mafic rocks and the predominantly gabbroid
文摘Kola nut is a native stimulant which is commonly chewed in many West African cultures, individually or in a group setting. It is often used ceremonially and to honour vip. Phytochemical analysis and antibacterial screening of red and white Cola nitida (kola nut) extracts were evaluated using qualitative and quantitative method. Thin layer chromatography (TLC) was used to evaluate the phenolic content. Antibacterial screening was done using agar well diffusion method against odontopathogens;(Lactobacillus sp., Corynebacterium haemolyticum, Proteus vulgans, Bacillus lentus, Streptococcus anginosus and Pseudomonas aeruginosa) obtained from stock cultures. Phytochemical screening revealed the presence of alkaloids, flavonoids, saponin, tannins, glycoside, steroids, volatile oil and balsams. Higher content of alkaloids, saponin and glycoside was obtained in the aqueous extract than the methanol for both red and white kola nut. The results of TLC analysis revealed the presence of quercetin and coumarin in red kola and keamferol and coumarin in white kola respectively. The result of antibacterial activity of red C. nitida showed a zone of inhibition of 18 mm and 23 mm at 60 mg/ml for aqueous extract on Proteus vulgans and Streptococcus anginosus. Similarly white kola inhibited the growth of S. anginosus at 90 mg/ml with a zone of 18 mm. Methanol extract of red kola inhibited the growth of P. vulgans and S. anginosus at 60 mg/ml with a zone of 16 mm and 20 mm respectively. Acetone and ethyl acetate extracts of both red and white kola nut did not show any activity against the tested organism at all concentrations. The results obtained indicate that C. nitida which posses promising chemotherapeutic and antibacterial potentials respectively that could be useful against odontopathogens. The study may serve as baseline for further studies.
文摘The purpose of this study is to determine the morphological diversity and distribution of Garcinia kola Heckel (Clusiaceae) in two preferential agro-ecological growth areas in Cote d’Ivoire, for the sustainable management of the species. Ninety-four (94) trees of G. kola were sampled in Affery (south) and Biankouma (west) and characterized on the basis of 13 quantitative characteristics of the fruit, the general appearance of a plant, leaves and seeds. This study revealed the existence of very significant variability and differences within the trees sampled for most characteristics. Very strong correlations were found among the characteristics of the fruits. On the basis of these characteristics, it emerged that the fruits of the Biankouma area are larger than those of Affery. Multivariate analyses show that diversity is structured with tree distribution into four distinct groups based on the following discriminating characteristics: fruit height (Hfr), leaf width (largF), seed mass (Mgr) and trunk diameter (Dm). These parameters can be used as a basis for selecting and maintaining the high variability of G. kola. Analysis of the geographical distribution of trees, based on the nearest neighbour model, revealed an aggregate distribution in both areas.
文摘The treatment and management of diabetes mellitus has been a challenge to achieve a total cure using conventional drugs. Hypoglycemic and hypolipidemic effects of bitter kola (<em>Garcinia kola</em>) seed extract on alloxan-induced diabetic rats were studied as a local product. Albino rats weighing about 200 g were investigated in groups using 200 - 800 mg/kg weight of bitter kola seed extract and the sample examined for glucose and lipid profiles using enzymatic methods and statistically analyzed using statistical package for social science (SPSS) windows, version 20.0. The results were expressed as the Mean ± SD. The results for the serum glucose and low density lipoprotein cholesterols (LDL-C) concentrations of untreated diabetic rats, and treated rats showed a significant (P < 0.05) progressive decrease from 200 - 800 mg/kg when compared to the control rats. Total cholesterol (TC) and triglycerides (TG) concentrations for untreated diabetic rats, and treated rats showed increase in concentration which was not significant (P > 0.05) from 200 - 800 mg/kg weight when compared with the controls. High density lipoproteins (HDL-C) concentrations for untreated diabetic rats, and treated rats showed increase in concentration which was significant (P < 0.05) from 200 - 800 mg/kg weight when compared with the controls. This study confirms the hypoglycemic and hypolipidemic effects of bitter kola (<em>Garcinia kola</em>) seed extract.
文摘This paper discusses the vein rocks located in the central part of Khibina Mts.. These rocks are located on the border of two zones： ore and external. In the ore, zone is present titanite-nepheline bodies whilst in the outer zone are massive-syenites ＂khibinites＂. The veins can be divided into： mikrosyenites, melteigites and other rock types （e.g., tinguaites）. The results of LA-ICP MS （laser ablation of inductively coupled plasma mass spectrometry） indicate that these rocks are associated with deep zones which formed as a result of injection of primary magma and contamination of fluids during migration, where there have hydrothermal processes. Rock-forming minerals, their corrosion and accessory minerals indicate these processes, too.
文摘Crude extracts of neem and bitter kola seeds were evaluated for inhibition of the growth of aflatoxin-producing fungi (Aspergillus flavus and A. parasiticus) in Zea mays L. Different concentrations of the methanolic and ethanolic extracts of the test plants were tested individually and in combination against A. flavus and A. parasiticus. Inhibition of A. flavus using methanolic extracts of G. kola, neem and combination of (G. kola and neem) seeds revealed that inhibition was highest in G. kola (77.5) at 10% concentration, and lowest in neem (35.1) at 2.5% concentration. Statistical analysis showed a significant difference at 5%. Inhibition of A. flavus using ethanolic extracts of G. kola, neem and combination of G. kola and neem seeds revealed that inhibition was highest in the combination of (80.4) at 10% concentration and lowest in G. kola (31.4) at 2.5% concentration. Using methanolic extracts of G. kola, neem and combination against A. parasiticus showed that inhibition was highest in G. kola and combination of seeds (54.8) at 10% concentration and lowest in neem seeds (30.5) at 5.0% concentration. The percentage inhibition of A. parasiticus using ethanolic extracts of G. kola, neem and combination revealed that inhibition was highest in G. kola (79.5) at 10% concentration and lowest in the combination of G. kola and neem seeds (26.6) at 2.5% concentration. These results will be important in planning a management strategy against A. flavus and A. parasiticus and other fungi associated with spoilage of stored products.
文摘This paper deals with the effect of blended cement and natural latex copolymer to static and dynamic properties of polymer modified concrete. The polymer was used copolymer of natural latex methacrylate (KOLAM) and copolymer of natural latex styrene (KOLAS) with composition of 1%, 5%, and 10% w/w of weight of blended cement in concrete mixture. They are tested for compressive strength, flexural strength, splitting tensile strength, and modulus elasticity for static analysis, and impact load and energy dissipation profile for dynamic analysis. The result shows that KOLAM with concentration 1% give better performance in static and dynamic properties. The KOLAM 1% gives improvement in flexural strength, splitting tensile strength and modulus elasticity about 4%, 13% and 3% compared to normal concrete. And for dynamic properties, KOLAM 1% could reduce impact load up to 35% and improve energy dissipation capacity about 45% compared to normal concrete. The concentration of KOLAM higher than 1% resulting negative effect to static and dynamic properties, except modulus of elasticity. For KOLAS, there were no positive trends of static and dynamic properties.
文摘Bisphenol A (BPA), a toxicant which can leach into food from plastic containers, is reported to induce neurotoxicity among others via oxidative mechanisms. However, antioxidant compounds have been suggested to mitigate BPA-induced toxicities. Garcinia kola (GK) and its bioactive compound, kolaviron, are well-established natural antioxidants, which can exert protective effects against BPA-induced toxicities. This study was designed to investigate the likely mitigating effect of GK and kolaviron on BPA-induced memory impairment and hippocampal neuroinflammation in male Wistar rats. Thirty-five rats were equally grouped and treated as follows: I and II received distilled water and corn oil, respectively at 0.2 mL, while III - VII received BPA (50 mg/kg), BPA + GK (200 mg/kg), BPA + kolaviron (200 mg/kg), GK and kolaviron, respectively for 28 days p.o. Thereafter, behavioral studies were done using the Novel Object Recognition and Y maze tests. Subsequently under anaesthesia, the hippocampus in each animal was dissected out, homogenized and analysed for malondialdehyde, superoxide dismutase, catalase, reduced glutathione, glutathione transferase, nitrites, interleukin-6, tumour necrosis factor-α, acetylcholinesterase, glutamate acid decarboxylase, and arginase activity. Data were analyzed by ANOVA and Tukey Post-hoc test at p p Garcinia kola and Kolaviron mitigate bisphenol A-induced memory impairment and neuroinflammation via antioxidant potentiation and neurotransmitter balance.
文摘This study was carried out in 2022 at the Itato agriculture community estate of fish hatchery in eastern Senegal with the aim of finding an alternative method to 17-α-methyl testosterone (MT) by using Garcinia kola “Bitter kola” powder to obtain Oreochromis niloticus male sex populations. 1800 fry of average size between 0.01 and 0.02 g were distributed in 12 aboveground tanks of 1 m3 each at a rate of 150 individuals/tank, following 6 duplicate treatments. The negative (B1 and B2) and positive (B3 and B4) control diets, to which between 0 and 60 mg/kg of 17alpha-methyl testosterone had been added respectively, were mixed with industrial feed containing 40% protein;the tank diets (B5 and B6), (B7 and B8), (B9 and B10) and (B11 and B12) contained 10 g, 20 g, 30 g and 40 g of Garcinia kola powder respectively for 1 kg of industrial feed con-taining 40% protein. These different treatments resulted in high proportions of males in the order of 97.03%;98.09% for the hormone and proportions of 94.03%;93.26% for 20 g of Garcinia kola extracts. In terms of weight growth, the best average weights for the hormone and Garcinia kola were 0.896 g and 0.980 g respectively. With regard to fish survival, the following results were recorded: 95.53% and 94.56% respectively for additions of 20 g and 30 g of Garcinia kola extracts to the feed supplied to the fish. On the other hand, a significant difference in the mortality rate of 35% and 5% respectively for the conventional hormone and 20 g of Garcinia kola extracts was observed. To conclude the study, it is recommended that further studies be carried out to determine the quality of the flesh, their life stages and the profile of the amino acids present in their proteins.
基金thank UEMOA for the financial support through the project LBTMM-PAES-UEMOA-2012.
文摘Kola nuts were regularly chewed by West Africans and Beninese in particularly. The aim of this study was to investigate nutritional and anti-nutrient content of three Benin’s kola nuts (Cola nitida, Cola acuminata and Garcinia kola). Proximate composition of the three species of kola nuts was assessed using standard analytical AOAC methods. Phenolics and flavonoids contents were determined by Folin-Ciocalteu and aluminum trichloride methods, respectively. Mineral composition was determined by Atomic Absorption Spectrometry method. Free and total amino acids were separated and quantified by HPLC. Protein content of the three kola nuts ranges from 4.95% (G. kola) to 10.64% (C. acuminata) whereas fat content ranges from 0.2 ± 0.00 (C. nitida) to 2.5 ± 0.42 (G. kola). Total phenolics abounded (2444.96 ± 81.56 μg Eq AG/100g) in C. acuminata, while flavonoids predominated (561.69 ± 22.10 μgEqQ/100g) in G. kola. The three species are a good source of magnesium and a copper provider was lowest in C. nitida (0.59 ± 0.08 mg/g) and in C. acuminata (0.65 ± 0.02 mg/g). The dominant total essential amino acids were threonine (C. acuminata) and methionine (C. acuminata and G. kola), while the predominant non-essential total amino acids according to species were arginine (C. nitida and G. kola), proline (C. acuminata) and cysteine (G. kola). For the anti-nutrients factors, saponins were in great proportion (8.33% ± 0.25%), while the oxalates were in small proportion (0.44% ± 0.04%). The three species have an interesting nutritional composition, but these seeds have the relatively lowest amino acids content.
文摘Inland fishing predominates in the Kedougou region, which has no coastline. This type of fishing does not yet meet the local population’s demand for fish products. In response to this concern, a Community Agricultural Estate housing an integrated fish farm was set up in the commune of Bandafassi, in the village of Itato. Since its creation, this production unit has been faced with the problem of sourcing high-quality, low-cost, monosex male Oreochromis niloticus fry. In order to overcome this constraint, the present research focuses on the contribution of Garcinia kola to the productivity and economic profitability of the Itato farm. The aim of the research is to assess fish production in the experimental set-up and the production costs of tilapia in a controlled environment. The comparative study of the various production factors shows disparities only in the input factor, where scenarios 2 and 3 use additional products. These are 17-α-methytestosterone for scenario 2 and Garcinia kola for scenario 3. These products significantly interfere with fish production, with a fairly high mortality rate for scenario 2 (25% for two production cycles/ cohort2 (B5, B6, B7 and B8) treated with 17-α-methytestosterone). As for scenarios 1 and 3, mortalities are 5% with or without recourse to additional products (G. kola). In addition, average fish production for the three (03) scenarios is estimated at 28687.5 kg/2 cycles. It varies from one scenario to another, i.e. 30937.5 kg/2 cycles for scenarios 1 and 3 and 24187.5 kg/2 cycles for scenario 2. It is therefore higher in scenarios 1 and 3 than in scenario 2. This difference is due to the fairly large losses of individuals in scenario 2. Furthermore, the analysis of the profit and loss accounts for tilapia production varies from one scenario to another depending on the type of farm: 476 Franc CFA for scenario 1, 610 Franc CFA for scenario 2 and 472 Franc CFA for scenario 3 (F CFA = franc of the French Colonies of Africa). The Average operating income for all the fish farming units is 34,726,142 Franc CFA. The highest (41,638,075 Franc CFA) and lowest (29,281,075 Franc CFA) ERs were observed in scenarios 3 and 2 respectively. It was 33,259,275 Franc CFA for scenario 1. The difference between the NERs of the three scenarios is more or less significant in terms of results. The operating result (OR) is positive in all 3 scenarios in our study. However, the scenario 3 system generates a higher rate of return (the ratio between an income and the capital employed to obtain that income) (74%) than that generated by the scenario 1 system (69%). As for the scenario 2 system, it generates a lower financial return than the two previous systems (67%). Above all, this work made it possible to construct an approach that would make it possible to answer such a question by relying successively on various methods: a typology, according to the production factors involved in the operation of the Community Agricultural Estate fish farm.
基金Yury L.Voytekhovsky,Professor,Director of Geological Institute of Kola Science Centre,Russian Academy of Sciences 14 Fersman Street,184209 Apatity,Murmansk region,Russia,E-mail:woyt@geoksc.apatity.ru。
文摘Eurogranites Arctic 2009 followed up a series of Eurogranites annual meetings,carried out in the Phanerozoic granite terrains of central and southern Europe since 1971.In 1996 the study turned to the Precambrian granitoids of the Fennoscandian Shield at the Eurogranites conference in Norway and was continued at the Eurogranites 2005 in Finland.Eurogranites 2009 extended the area of investigation all the more,having overlapped alkaline massifs of the Russian Kola Peninsula.The excursion was jointly convened by specialists of the University of Helsinki,Finnish Museum of Natural History(Finland)and Geological Institute of the Kola Science Centre of the Russian Academy of Sciences(Russia).Participants,21 in total,were predominantly from Europe(Italy,Germany,Great Britain,Ireland,Belgium,Portugal),but there were also attendees from USA,Estonia,Slovakia,Finland,Norway.
基金The study was funded by West African Climate Change and Adapted Land use programme through the German Federal Ministry for Education and Research.
文摘Background:Garcinia kola is an indigenous multipurpose tree species commonly found in the tropical rain forest zone of West and Central Africa.Providing economic,ecological,and socio-cultural benefits for people,they have potentials to improve the regional and local income generation to the farmers but the cultivation of the species is very limited in Nigeria.Methods:The study investigated cultivation and farmers’perceptions on the impacts of climate change on goods and services provided by G.kola in Nigeria.Structured questioners and interviews were used.The data obtained was analyzed using descriptive and inferential statistic such as frequency,percentage,chi-square,and multinomial logit regressions with SPSS Version 20 and R software Version 3.1.0.Results:The results show that farmers are presently not cultivating G.kola,and most of the available stands were inherited from grandparents.The farmers still believe it is only God that can make G.kola to germinate;however,information about the new improved methods of raising G.kola was not spread across farmers’communities.Over 93%of these farmers were not aware of these new methods,and the only means they raise the species is by picking the wildlings that regenerate naturally close to mother tree and are rarely found.The finding also shows that farmers are well aware of climate change and its impact on crop productivity is not clear to them.The result shows that five explanatory variables(age,gender,marital status,education level,household size and primary occupation)are the main factors significantly influencing farmers’perception of climate change and the cultivation of the G.kola.During interview section,the farmers reported variability of Harmattan season influences fruit production of the species;according to them,increase in Harmattan season usually leads to increase in fruiting of G.kola.Conclusions:Based on our findings,all the 215 respondent interviewed agree that climatic variability influences the availability of G.kola which will in turn have significant effects on the goods and services provided to the people.Efforts should be made at educating the rural farmers on propagation possibilities,potential ecosystem services,and the impact of climate change on multiple-purpose agroforestry species.
