Nettle plants widely exist in China, but up to now there is no research regarding Chinese nettle fiber properties, especially about its spinnability. This paper has studied the properties of Chinese nettle fiber and i...Nettle plants widely exist in China, but up to now there is no research regarding Chinese nettle fiber properties, especially about its spinnability. This paper has studied the properties of Chinese nettle fiber and its spinnability. The research results show that the average length of nettle fiber is about 34 mm, the nettle fiber fineness ranging from 0.589 to 0.769 tex. Nettle fiber has high breaking strength, low breaking extension and high initial modulus. Both the biochemical method and chemical method can meet the requirement of nettle degumming, with the residual being less than 4%. Nettle fiber can be utilised as textile material and can be spun in rotor-spinning machines after well degummed.展开更多
Nootka rose (</span><i><span style="font-family:Verdana;">Rosa nutkana </span></i><span style="font-family:Verdana;">C. Presl) and stinging nettle (</span>...Nootka rose (</span><i><span style="font-family:Verdana;">Rosa nutkana </span></i><span style="font-family:Verdana;">C. Presl) and stinging nettle (</span></span><i><span style="font-family:Verdana;">Urtica dioica </span></i><span style="font-family:Verdana;">L.</span><span style="font-family:""><span style="font-family:Verdana;">) have been traditionally used in the treatment of skin infection by Indigenous peoples of Vancouver Island, British Columbia, Canada. The main objective of this study was to examine the antibacterial efficacy of extracts of Nootka </span><span style="font-family:Verdana;">rose and stinging nettle against the common pathogenic skin bacteria</span> </span><i><span style="font-family:Verdana;">Staphylococcus aureus</span></i><span style="font-family:""><span style="font-family:Verdana;">,</span><i><span style="font-family:Verdana;"> Micrococcus luteus</span></i><span style="font-family:Verdana;">, and </span><i><span style="font-family:Verdana;">Pseudomonas aeruginosa</span></i> </span><span style="font-family:Verdana;">using </span><span style="font-family:Verdana;">Indigenous science and standard methods of analysis. The Indigenous science method of plant extraction by steeping as advised by the Traditional Knowledge keeper</span><span style="font-family:Verdana;"> was performed to examine minimum inhibitory concentration </span><span style="font-family:Verdana;">(MIC) </span><span style="font-family:Verdana;">values and minimum bactericidal concentrations </span><span style="font-family:Verdana;">(MBC) by serial dilution and bacterial population counts. </span><span style="font-family:Verdana;">Soxhlet extractions and Kirby Bauer disc sensitivity testing showed that Nootka rose </span><span style="font-family:Verdana;">extracts possessed antibacterial effectiveness against all three bacterial species while stinging nettle extracts were effective against </span><i><span style="font-family:Verdana;">M. luteus</span></i><span style="font-family:""><span style="font-family:Verdana;">. Results for MIC and MBC indicated antibacterial activity against </span><i><span style="font-family:Verdana;">M. luteus</span></i><span style="font-family:Verdana;"> and </span><i><span style="font-family:Verdana;">S. aureus</span></i><span style="font-family:Verdana;"> for the </span></span><span style="font-family:Verdana;">Nootka rose when using </span><span style="font-family:""><span style="font-family:Verdana;">full-strength solutions;all three bacterial species exhibited growth when undiluted stinging nettle treatments were used. When considering bacterial population counts for</span><b> </b><i><span style="font-family:Verdana;">S. aureus,</span></i><span style="font-family:Verdana;"> results indicated</span><b> </b><span style="font-family:Verdana;">that only the Nootka rose treatment offered effective inhibition. Chemical analysis showed that alkaloid percentage was greater in the stinging nettle (0.17%) than </span></span><span style="font-family:Verdana;">Nootka rose </span><span style="font-family:Verdana;">(0.07%), while saponin percentage was greater in the </span><span style="font-family:Verdana;">Nootka rose </span><span style="font-family:Verdana;">(0.87%) than stinging nettle (0.17%). Overall, </span><span style="font-family:""><span style="font-family:Verdana;">Nootka rose showed a greater level of</span><b> </b><span style="font-family:Verdana;">antibacterial effectiveness than </span></span><span style="font-family:Verdana;">stinging nettle by Indigenous and Western scientific methods of plant extract preparation.展开更多
Objective:To investigate the antioxidant ef ect of an orally administered ethanol extract of nettle(Urtica dioica) and its protective role in preventing or ameliorating oxidative stress as a major factor in gentamicin...Objective:To investigate the antioxidant ef ect of an orally administered ethanol extract of nettle(Urtica dioica) and its protective role in preventing or ameliorating oxidative stress as a major factor in gentamicin-induced nephrotoxicity in male rabbits. Methods: Twenty rabbits were divided into 4 equal groups:(G1) control group,(G2) gentamicin treated group(100 mg/kg),(G3) nettle treated group(100 mg/kg),(G4) combination treated group with both gentamicin(100 mg/kg) and nettle(100 mg/kg) for 10 days. The antioxidant properties of nettle were evaluated using dif erent antioxidant tests, such as determination of glutathione and malondialdehyde levels and total phenolic content analysis. Results: Biochemical and histopathological study revealed that gentamicin caused nephrotoxicity observed clearly in the histopathological section of the kidney in the gentamicin treated group. Serum creatinine and blood urea nitrogen were biochemical indicators for nephrotoxicity which increased signii cantly in gentamicin treated group; other groups have no signii cant change in these two parameters. Nettle extract protected the rabbits from alteration in the level of blood urea nitrogen and serum creatinine when given after inducing of gentamicin nephrotoxicity. The nettle treated group showed a great ef ect as an antioxidant factor by increasing the glutathione level and reducing malondialdehyde level. No signii cant changes in biochemical parameters and no renal histopathological changes observed in the groups treated with nettle extract, which meant nettle had powerful antioxidant activity. Conclusions: Therefore, it can be assumed that the nephroprotective ef ect shown by nettle in gentamicin-induced nephrotoxicity can reserve intracellular levels of biological pathways and supportively enhance excretion of toxic levels of gentamicin.展开更多
Organic farming has an important place in agricultural economy.However few studies talk about biological control of many enemies groups.This study aims to illustrate nettle efficiency as preventive fight towards both ...Organic farming has an important place in agricultural economy.However few studies talk about biological control of many enemies groups.This study aims to illustrate nettle efficiency as preventive fight towards both insect’s outbreaks and disease infestation.It consists of verifying if nettle extract has curative properties towards gummosis citrus or stops development disease and we evaluated its efficiency on main insects’pests of bean.Moreover nettle field of insects was tested if it can protect bean.Investigational device was realized during season crop 2017-2019 and took place in market gardens around the city Antananarivo(Madagascar).Nettle field of insects’efficiency was compared with witness plots and field of insects which composed with various companions’plants(maize,nettle,crucifers).Each companions’specie grows on 1 m width and the length depends on plot size which needs protection.And nettle extract modalities were compared with witness untreated and reference treatment such as garlic extract for insecticides plants and Bordeaux mixture for mineral fungicide.Each bean plot has a surface of 20 m2spaced out at least 0.5 cm.Three repetitions were realized for each modality.For citrus disease evaluation was realized on 10 observed plants that each plant constitutes one modality.Evolution of pest number for bean and symptoms of gummosis(yellow leaf importance and phytosanitary situation after treatment)was observed as parameters.As results,nettle extract has a better efficiency to control bean aphids as reference treatment and restores citrus gumminess as much as treated with mineral fungicide.Similarly,nettle field of insects presented the same efficiency to allow diversifying pest as diversification field insects’.In sum use of nettle extract needs tracking on gummosis citrus if there was reverse disease.Nevertheless,nettle has appreciable protection properties on crops which can help farmers to produce in a sustainable and environmentally-friendly way.展开更多
Pesticides were economically important chemicals in agriculture. Their use has permitted agricultural progress, through the eradication of harmful insect and the fight against vectors of disease. However, several stud...Pesticides were economically important chemicals in agriculture. Their use has permitted agricultural progress, through the eradication of harmful insect and the fight against vectors of disease. However, several studies question the beneficial effects of organophosphorus compounds, showing that their deregulated use causes various problems of environmental pollution and human health. The present study shows that chronic exposure to a subtoxic dose of dimethoate is likely to affect cognitive and behavioral functions of rats (both males and females). Our results show that exposure to dimethoate affects both short and long-term memory capacities. The short-term memory results are more pronounced. Treatment with nettle extract allowed a significant improvement in cognitive and behavioral performance of the rats after their exposure to dimethoate.展开更多
Nettle is not only a nutrient-rich forage but also possesses the potential to act as a nutritional and physiological regulator.This study investigated the effects of supplementing nettle hay into the total mixed ratio...Nettle is not only a nutrient-rich forage but also possesses the potential to act as a nutritional and physiological regulator.This study investigated the effects of supplementing nettle hay into the total mixed rations(TMR)on milk yield,milk composition,antioxidant capacity,immune function,and plasma metabolome in dairy cows.Twenty multiparous Holstein cows with similar days in milk(102±8 d),milk production(39±3 kg/d),milk fat(3.78±0.55%),and milk protein(3.24±0.28%)were randomly assigned to two dietary treatments:a control group(AH group,n=10)receiving a TMR with 10.5%alfalfa hay and a nettle group(NH group,n=10)receiving a TMR with 10.5%nettle hay.The experiment lasted for 80 d,including a 20 d pre-feeding period.Milk yield and overall composition remained consistent across the groups.However,the NH group exhibited a significant decrease in milk aspartic acid(P=0.025)and a concomitant increase in arginine(P=0.031).Nettle supplementation significantly reduced blood aspartate aminotransferase levels(P=0.005)and improved antioxidant status,as evidenced by a higher total antioxidant capacity(P=0.039)and total superoxide dismutase activity(P=0.016),along with lower malondialdehyde(P=0.018).The metabolome analysis identified 1143 differential metabolites using the positive ionization mode and 1253 differential metabolites using the negative ionization mode.KEGG analysis revealed significant enrichment of differential metabolites in arachidonic acid,linoleic acid,and amino acid metabolism pathways.Lysophosphatidylcholines and enterolactone displayed a significant negative correlation with blood aspartate aminotransferase levels(r<−0.5,P<0.05)and interleukin-6 levels(r<−0.5,P<0.05).In conclusion,nettle supplementation significantly influenced the immune and antioxidant capacities of dairy cows by altering the blood metabolome profile.Lysophosphatidylcholines and enterolactone are proposed as potential biomarkers for evaluating the physiological and immune effects of nettle supplementation.Further research is warranted to elucidate the specific mechanisms underlying these effects and optimize the feeding regimen for optimal outcomes.展开更多
Background:This study investigated the phenolic profile,antioxidant capacity,antibacterial effect,and antihemolytic activity of nettle leaves from two understudied Algerian species,Urtica pilulifera and Urtica urens.M...Background:This study investigated the phenolic profile,antioxidant capacity,antibacterial effect,and antihemolytic activity of nettle leaves from two understudied Algerian species,Urtica pilulifera and Urtica urens.Methods:Urtica pilulifera and Urtica urens leaves extracts were prepared by maceration using methanol and distilled water respectively.Their phytochemical analysis(total phenolic content,flavonoids,hydrolysable and condensed tannins)was determined.The chemical profle of these extracts was performed using ultra-high-performance liquid chromatography diode array detection tandem mass spectrometry.Antioxidant activity(using the 2,2-diphenyl-1-picrylhydrazyl free radical scavenging method),antibacterial activity(using disk diffusion method),and antihemolytic activity were carried out.Results:Results reveal high levels of flavonoids,tannins,alkaloids,and terpenoids.Several classes of compounds were identified in the extracts.Phenolic acid and other acids and their derivatives and flavonoids were detected in the extracts,with 4-O-caffeoyl-quinic acid and 5-O-caffeoyl-quinic acid being the main constituents in both extracts.Caffeic acid was also the main constituent present only in U.urens extract.For antioxidant activity of the methanolic extract of U.pilulifera and the aqueous extract of U.urens,the percentage inhibition value(82.76%and 59.06%)and the half-maximum inhibitory concentration(IC_(50))value(302 and 423μg/mL),respectively,were obtained.Antibacterial activity of nettle extracts(10 mg/mL)demonstrated the sensitivity of pathogenic strain susceptibility.The strongest antibacterial effect on tested strains was found in the aqueous extract of U.urens against Staphylococcus aureus(21±0.41 mm)compared to the methanolic extract of U.pilulifera(16±0.40 mm).The antihemolytic activity in the methanolic and aqueous extracts was 76.26%and 60.67%,respectively.The methanolic extract exhibited exceptional antihemolytic effect,with an IC_(50)value of 327μg/mL,whereas the aqueous extract had an IC_(50)value of 412μg/mL.Conclusions:The study confirms the presence of bioactive substances in the nettle species,including flavonoids and tannins,which possess antioxidant,antibacterial,and antihemolytic properties,and can be processed into food and pharmaceutical products.展开更多
The common nettle （Urtica dioica L.） is a perennial and cosmopolitan plant species and is known to be the source of food for a great diversity of insects. To understand the importance of the nettle in agro-ecosystem...The common nettle （Urtica dioica L.） is a perennial and cosmopolitan plant species and is known to be the source of food for a great diversity of insects. To understand the importance of the nettle in agro-ecosystems, a field experiment was carried out in an experimental farm at Gembloux （Belgium） to study the effect of nettle margin strips on aphid and aphidophagous populations in close field crops, namely wheat （Triticum aestivum L.）, green pea （Pisum sativum L.） and rape （Brassicae napus L.）. The aphids and related beneficial populations were weekly assessed, from March to August 2005, by visual observations in two plots per field crop. A higher abundance of aphidophagous beneficials was collected in nettle strips when compared to the field crops. Particularly, the presence of predatory anthocorids, mirids and green lacewings was observed on nettle only. Nevertheless, the most abundant aphid predatory family, the Coccinellidae, was distributed in both environments, in nettle strips and in crop fields. The field margin supported a significantly higher density ofHarmonia axyridis than the field crops. In contrast, the field crops, green pea particularly, supported a higher density of Coccinella septempunctata. The distribution of the aphidophagous species, mainly the ladybirds, was discussed in relation to the host plant and related aphid species and their potential effect on integrated pest management.展开更多
The aim of this experiment was to evaluate the effects of dietary supplementation of stinging nettle powder(SNP) on laying performance,egg quality,and some selected serum biochemical parameters of quails.One hundred a...The aim of this experiment was to evaluate the effects of dietary supplementation of stinging nettle powder(SNP) on laying performance,egg quality,and some selected serum biochemical parameters of quails.One hundred and forty-four 10-wk-old Japanese quails(initial body weight=199±18 g) were divided into 3 dietary treatment groups(basic diet without SNP [SNPO],SNPO with 3% SNP [SNP3],SNPO with 6% SNP [SNP6]) with 4 replicates of 12 quails for a rearing period of 12 wk.At 22 wk of age,the final body weights of the SNP3 and SNP6 groups were significantly(P=0.001) reduced compared to that of the SNPO group.Daily feed intake was not statistically different among the groups.The mean number of eggs laid ranged from 65 to 69 with laying rates from 76.8% to 82.1%.The percentage of cracked eggs was not significantly different among the groups and ranged from 1.6% to 1.9%.The egg weight was similar and the feed conversion ratio was closer among the groups.The egg yolk cholesterol,serum cholesterol and serum triglyceride levels in the SNP6 group were significantly reduced(P <0.001) compared to those of the SNPO group.Serum Ca,P and Mg were not significantly influenced by the supplementation.In conclusion,the results demonstrated that the supplementation of SNP to the quail diet at the level of 6%reduced quail egg yolk cholesterol,serum total cholesterol and serum triglyceride levels and did not negatively influence quail performance.展开更多
The aim of the present study was to evaluate the bioactive properties of plant tea and Kombucha samples produced using Anatolian hawthorn(KH),nettle leaves(KN)and black tea(KC,as control)during storage at 4℃ for 120 ...The aim of the present study was to evaluate the bioactive properties of plant tea and Kombucha samples produced using Anatolian hawthorn(KH),nettle leaves(KN)and black tea(KC,as control)during storage at 4℃ for 120 days.The total phenolic and flavonoid contents of Kombucha samples were found in the range of 995.33 mg GAE/L-2456.83 mg GAE/L and 75.21 mg CE/L-193.68 mg CE/L,respectively,where the values were higher than plant tea samples.During storage period,total phenolic contents of KC were generally higher than other samples,while higher total flavonoid content,total acidity and ash contents were found in KN.When antioxidant activity was detected by ABTS method,no significant differences was observed between Kombucha samples(89.68%-94.84%),while DPPH method gave higher results in KC than KH and KN.Although antioxidant activity of the samples showed a fluctuation during storage period,higher levels(80.48%-90.36%by ABTS method and 65.60%-70.76%by DPPH method)were observed in KC at the end of the storage(P<0.05),which is compatible with the total phenolic content results.Antimicrobial activities of the samples were examined by detecting minimum inhibitory concentration(MIC)and minimum bactericidal concentration(MBC).MIC values were in the range of 15.63μg/mL-125.00μg/mL.Besides,antimicrobial effect of KN was found higher than KH and KC.However,inhibition effects of Kombucha samples were decreased at the end of the storage time.The results make Anatolian hawthorn and nettle leaves interesting for the production of Kombucha beverages,which have distinct bioactive properties.展开更多
Medicinal plants are widely employed for healing reasons in many native systems of medicine and are becoming increasingly popular in modern culture as alternatives to manufactured medications.The current study is a de...Medicinal plants are widely employed for healing reasons in many native systems of medicine and are becoming increasingly popular in modern culture as alternatives to manufactured medications.The current study is a descriptive review in which papers were searched from several databases such as Springer,Wiley,Taylor and Francis,Elsevier,etc.It is time to rethink the way we improve our immune systems and seek evidence-based treatments that best use plant-based medicines to benefit patients.Bioactive principles are responsible for medicinal plants’therapeutic actions and give limitless chances for novel drug leads because of their exceptional availability of chemical variety.The chemical characteristics of the included bioactive components determine whether standardized plant extracts are beneficial or poisonous.A summary of research papers on plants such as garlic,aloe vera,stinging nettle,saffron,clove,holy basil,turmeric,cinnamon,giloe,liquorice,and aloe vera having bioactive molecules and cures for several diseases such as influenza virus,gastrointestinal cancer neurodegenerative disorder,cardiovascular diseases,urinary disorder,diabetes,skin disease,obesity,and respiratory disorder is included in this overview.展开更多
Urticaceae includes about 1300 species in 47 genera which largely spread in wet tropical regions,and 341 species in 25 genera are in China.Some species are used in Chinese folk medicine.So far,studies on chemistry and...Urticaceae includes about 1300 species in 47 genera which largely spread in wet tropical regions,and 341 species in 25 genera are in China.Some species are used in Chinese folk medicine.So far,studies on chemistry and pharmacology of Urticaceous plants are mainly focused on nettle of Urtica L.In this review,the chemical researches on 35 new compounds and related pharmacological effects of the plants in Urticaceae reported during 2000-2010 are described.The 35 new compounds belong to the classes of lignan,secolignan,norlignan,flavonoid,alkaloid,sesquiterpenoid,triterpenoid,sterol,and sphingolipid.The main bioactivities include cytotoxic,antitumor,antimicrobial,antifungal,anti-BPH,anti-HIV,antidiabetic,hypolipidemic,5α-reductase inhibitory,hair regrowth promotion,and anti-oxidative activities.展开更多
基金The preparation and publication of this paper is supported by the Doctorate Foundation of Xi an University of Engineering Science andTechnology
文摘Nettle plants widely exist in China, but up to now there is no research regarding Chinese nettle fiber properties, especially about its spinnability. This paper has studied the properties of Chinese nettle fiber and its spinnability. The research results show that the average length of nettle fiber is about 34 mm, the nettle fiber fineness ranging from 0.589 to 0.769 tex. Nettle fiber has high breaking strength, low breaking extension and high initial modulus. Both the biochemical method and chemical method can meet the requirement of nettle degumming, with the residual being less than 4%. Nettle fiber can be utilised as textile material and can be spun in rotor-spinning machines after well degummed.
文摘Nootka rose (</span><i><span style="font-family:Verdana;">Rosa nutkana </span></i><span style="font-family:Verdana;">C. Presl) and stinging nettle (</span></span><i><span style="font-family:Verdana;">Urtica dioica </span></i><span style="font-family:Verdana;">L.</span><span style="font-family:""><span style="font-family:Verdana;">) have been traditionally used in the treatment of skin infection by Indigenous peoples of Vancouver Island, British Columbia, Canada. The main objective of this study was to examine the antibacterial efficacy of extracts of Nootka </span><span style="font-family:Verdana;">rose and stinging nettle against the common pathogenic skin bacteria</span> </span><i><span style="font-family:Verdana;">Staphylococcus aureus</span></i><span style="font-family:""><span style="font-family:Verdana;">,</span><i><span style="font-family:Verdana;"> Micrococcus luteus</span></i><span style="font-family:Verdana;">, and </span><i><span style="font-family:Verdana;">Pseudomonas aeruginosa</span></i> </span><span style="font-family:Verdana;">using </span><span style="font-family:Verdana;">Indigenous science and standard methods of analysis. The Indigenous science method of plant extraction by steeping as advised by the Traditional Knowledge keeper</span><span style="font-family:Verdana;"> was performed to examine minimum inhibitory concentration </span><span style="font-family:Verdana;">(MIC) </span><span style="font-family:Verdana;">values and minimum bactericidal concentrations </span><span style="font-family:Verdana;">(MBC) by serial dilution and bacterial population counts. </span><span style="font-family:Verdana;">Soxhlet extractions and Kirby Bauer disc sensitivity testing showed that Nootka rose </span><span style="font-family:Verdana;">extracts possessed antibacterial effectiveness against all three bacterial species while stinging nettle extracts were effective against </span><i><span style="font-family:Verdana;">M. luteus</span></i><span style="font-family:""><span style="font-family:Verdana;">. Results for MIC and MBC indicated antibacterial activity against </span><i><span style="font-family:Verdana;">M. luteus</span></i><span style="font-family:Verdana;"> and </span><i><span style="font-family:Verdana;">S. aureus</span></i><span style="font-family:Verdana;"> for the </span></span><span style="font-family:Verdana;">Nootka rose when using </span><span style="font-family:""><span style="font-family:Verdana;">full-strength solutions;all three bacterial species exhibited growth when undiluted stinging nettle treatments were used. When considering bacterial population counts for</span><b> </b><i><span style="font-family:Verdana;">S. aureus,</span></i><span style="font-family:Verdana;"> results indicated</span><b> </b><span style="font-family:Verdana;">that only the Nootka rose treatment offered effective inhibition. Chemical analysis showed that alkaloid percentage was greater in the stinging nettle (0.17%) than </span></span><span style="font-family:Verdana;">Nootka rose </span><span style="font-family:Verdana;">(0.07%), while saponin percentage was greater in the </span><span style="font-family:Verdana;">Nootka rose </span><span style="font-family:Verdana;">(0.87%) than stinging nettle (0.17%). Overall, </span><span style="font-family:""><span style="font-family:Verdana;">Nootka rose showed a greater level of</span><b> </b><span style="font-family:Verdana;">antibacterial effectiveness than </span></span><span style="font-family:Verdana;">stinging nettle by Indigenous and Western scientific methods of plant extract preparation.
文摘Objective:To investigate the antioxidant ef ect of an orally administered ethanol extract of nettle(Urtica dioica) and its protective role in preventing or ameliorating oxidative stress as a major factor in gentamicin-induced nephrotoxicity in male rabbits. Methods: Twenty rabbits were divided into 4 equal groups:(G1) control group,(G2) gentamicin treated group(100 mg/kg),(G3) nettle treated group(100 mg/kg),(G4) combination treated group with both gentamicin(100 mg/kg) and nettle(100 mg/kg) for 10 days. The antioxidant properties of nettle were evaluated using dif erent antioxidant tests, such as determination of glutathione and malondialdehyde levels and total phenolic content analysis. Results: Biochemical and histopathological study revealed that gentamicin caused nephrotoxicity observed clearly in the histopathological section of the kidney in the gentamicin treated group. Serum creatinine and blood urea nitrogen were biochemical indicators for nephrotoxicity which increased signii cantly in gentamicin treated group; other groups have no signii cant change in these two parameters. Nettle extract protected the rabbits from alteration in the level of blood urea nitrogen and serum creatinine when given after inducing of gentamicin nephrotoxicity. The nettle treated group showed a great ef ect as an antioxidant factor by increasing the glutathione level and reducing malondialdehyde level. No signii cant changes in biochemical parameters and no renal histopathological changes observed in the groups treated with nettle extract, which meant nettle had powerful antioxidant activity. Conclusions: Therefore, it can be assumed that the nephroprotective ef ect shown by nettle in gentamicin-induced nephrotoxicity can reserve intracellular levels of biological pathways and supportively enhance excretion of toxic levels of gentamicin.
文摘Organic farming has an important place in agricultural economy.However few studies talk about biological control of many enemies groups.This study aims to illustrate nettle efficiency as preventive fight towards both insect’s outbreaks and disease infestation.It consists of verifying if nettle extract has curative properties towards gummosis citrus or stops development disease and we evaluated its efficiency on main insects’pests of bean.Moreover nettle field of insects was tested if it can protect bean.Investigational device was realized during season crop 2017-2019 and took place in market gardens around the city Antananarivo(Madagascar).Nettle field of insects’efficiency was compared with witness plots and field of insects which composed with various companions’plants(maize,nettle,crucifers).Each companions’specie grows on 1 m width and the length depends on plot size which needs protection.And nettle extract modalities were compared with witness untreated and reference treatment such as garlic extract for insecticides plants and Bordeaux mixture for mineral fungicide.Each bean plot has a surface of 20 m2spaced out at least 0.5 cm.Three repetitions were realized for each modality.For citrus disease evaluation was realized on 10 observed plants that each plant constitutes one modality.Evolution of pest number for bean and symptoms of gummosis(yellow leaf importance and phytosanitary situation after treatment)was observed as parameters.As results,nettle extract has a better efficiency to control bean aphids as reference treatment and restores citrus gumminess as much as treated with mineral fungicide.Similarly,nettle field of insects presented the same efficiency to allow diversifying pest as diversification field insects’.In sum use of nettle extract needs tracking on gummosis citrus if there was reverse disease.Nevertheless,nettle has appreciable protection properties on crops which can help farmers to produce in a sustainable and environmentally-friendly way.
文摘Pesticides were economically important chemicals in agriculture. Their use has permitted agricultural progress, through the eradication of harmful insect and the fight against vectors of disease. However, several studies question the beneficial effects of organophosphorus compounds, showing that their deregulated use causes various problems of environmental pollution and human health. The present study shows that chronic exposure to a subtoxic dose of dimethoate is likely to affect cognitive and behavioral functions of rats (both males and females). Our results show that exposure to dimethoate affects both short and long-term memory capacities. The short-term memory results are more pronounced. Treatment with nettle extract allowed a significant improvement in cognitive and behavioral performance of the rats after their exposure to dimethoate.
基金Funding for this study was provided by the Joint Project of Inner Mongolia Natural Science Foundation(No.2024LHMS03044)the Central Public-interest Scientific Institution Basal Research Fund,Hohhot,China(No.1610332022002).
文摘Nettle is not only a nutrient-rich forage but also possesses the potential to act as a nutritional and physiological regulator.This study investigated the effects of supplementing nettle hay into the total mixed rations(TMR)on milk yield,milk composition,antioxidant capacity,immune function,and plasma metabolome in dairy cows.Twenty multiparous Holstein cows with similar days in milk(102±8 d),milk production(39±3 kg/d),milk fat(3.78±0.55%),and milk protein(3.24±0.28%)were randomly assigned to two dietary treatments:a control group(AH group,n=10)receiving a TMR with 10.5%alfalfa hay and a nettle group(NH group,n=10)receiving a TMR with 10.5%nettle hay.The experiment lasted for 80 d,including a 20 d pre-feeding period.Milk yield and overall composition remained consistent across the groups.However,the NH group exhibited a significant decrease in milk aspartic acid(P=0.025)and a concomitant increase in arginine(P=0.031).Nettle supplementation significantly reduced blood aspartate aminotransferase levels(P=0.005)and improved antioxidant status,as evidenced by a higher total antioxidant capacity(P=0.039)and total superoxide dismutase activity(P=0.016),along with lower malondialdehyde(P=0.018).The metabolome analysis identified 1143 differential metabolites using the positive ionization mode and 1253 differential metabolites using the negative ionization mode.KEGG analysis revealed significant enrichment of differential metabolites in arachidonic acid,linoleic acid,and amino acid metabolism pathways.Lysophosphatidylcholines and enterolactone displayed a significant negative correlation with blood aspartate aminotransferase levels(r<−0.5,P<0.05)and interleukin-6 levels(r<−0.5,P<0.05).In conclusion,nettle supplementation significantly influenced the immune and antioxidant capacities of dairy cows by altering the blood metabolome profile.Lysophosphatidylcholines and enterolactone are proposed as potential biomarkers for evaluating the physiological and immune effects of nettle supplementation.Further research is warranted to elucidate the specific mechanisms underlying these effects and optimize the feeding regimen for optimal outcomes.
基金Ministry of Science,Technological Development and Innovations of the Republic of Serbia,Grant/Award Number:451-03-137/2025-03/200133。
文摘Background:This study investigated the phenolic profile,antioxidant capacity,antibacterial effect,and antihemolytic activity of nettle leaves from two understudied Algerian species,Urtica pilulifera and Urtica urens.Methods:Urtica pilulifera and Urtica urens leaves extracts were prepared by maceration using methanol and distilled water respectively.Their phytochemical analysis(total phenolic content,flavonoids,hydrolysable and condensed tannins)was determined.The chemical profle of these extracts was performed using ultra-high-performance liquid chromatography diode array detection tandem mass spectrometry.Antioxidant activity(using the 2,2-diphenyl-1-picrylhydrazyl free radical scavenging method),antibacterial activity(using disk diffusion method),and antihemolytic activity were carried out.Results:Results reveal high levels of flavonoids,tannins,alkaloids,and terpenoids.Several classes of compounds were identified in the extracts.Phenolic acid and other acids and their derivatives and flavonoids were detected in the extracts,with 4-O-caffeoyl-quinic acid and 5-O-caffeoyl-quinic acid being the main constituents in both extracts.Caffeic acid was also the main constituent present only in U.urens extract.For antioxidant activity of the methanolic extract of U.pilulifera and the aqueous extract of U.urens,the percentage inhibition value(82.76%and 59.06%)and the half-maximum inhibitory concentration(IC_(50))value(302 and 423μg/mL),respectively,were obtained.Antibacterial activity of nettle extracts(10 mg/mL)demonstrated the sensitivity of pathogenic strain susceptibility.The strongest antibacterial effect on tested strains was found in the aqueous extract of U.urens against Staphylococcus aureus(21±0.41 mm)compared to the methanolic extract of U.pilulifera(16±0.40 mm).The antihemolytic activity in the methanolic and aqueous extracts was 76.26%and 60.67%,respectively.The methanolic extract exhibited exceptional antihemolytic effect,with an IC_(50)value of 327μg/mL,whereas the aqueous extract had an IC_(50)value of 412μg/mL.Conclusions:The study confirms the presence of bioactive substances in the nettle species,including flavonoids and tannins,which possess antioxidant,antibacterial,and antihemolytic properties,and can be processed into food and pharmaceutical products.
文摘The common nettle （Urtica dioica L.） is a perennial and cosmopolitan plant species and is known to be the source of food for a great diversity of insects. To understand the importance of the nettle in agro-ecosystems, a field experiment was carried out in an experimental farm at Gembloux （Belgium） to study the effect of nettle margin strips on aphid and aphidophagous populations in close field crops, namely wheat （Triticum aestivum L.）, green pea （Pisum sativum L.） and rape （Brassicae napus L.）. The aphids and related beneficial populations were weekly assessed, from March to August 2005, by visual observations in two plots per field crop. A higher abundance of aphidophagous beneficials was collected in nettle strips when compared to the field crops. Particularly, the presence of predatory anthocorids, mirids and green lacewings was observed on nettle only. Nevertheless, the most abundant aphid predatory family, the Coccinellidae, was distributed in both environments, in nettle strips and in crop fields. The field margin supported a significantly higher density ofHarmonia axyridis than the field crops. In contrast, the field crops, green pea particularly, supported a higher density of Coccinella septempunctata. The distribution of the aphidophagous species, mainly the ladybirds, was discussed in relation to the host plant and related aphid species and their potential effect on integrated pest management.
文摘The aim of this experiment was to evaluate the effects of dietary supplementation of stinging nettle powder(SNP) on laying performance,egg quality,and some selected serum biochemical parameters of quails.One hundred and forty-four 10-wk-old Japanese quails(initial body weight=199±18 g) were divided into 3 dietary treatment groups(basic diet without SNP [SNPO],SNPO with 3% SNP [SNP3],SNPO with 6% SNP [SNP6]) with 4 replicates of 12 quails for a rearing period of 12 wk.At 22 wk of age,the final body weights of the SNP3 and SNP6 groups were significantly(P=0.001) reduced compared to that of the SNPO group.Daily feed intake was not statistically different among the groups.The mean number of eggs laid ranged from 65 to 69 with laying rates from 76.8% to 82.1%.The percentage of cracked eggs was not significantly different among the groups and ranged from 1.6% to 1.9%.The egg weight was similar and the feed conversion ratio was closer among the groups.The egg yolk cholesterol,serum cholesterol and serum triglyceride levels in the SNP6 group were significantly reduced(P <0.001) compared to those of the SNPO group.Serum Ca,P and Mg were not significantly influenced by the supplementation.In conclusion,the results demonstrated that the supplementation of SNP to the quail diet at the level of 6%reduced quail egg yolk cholesterol,serum total cholesterol and serum triglyceride levels and did not negatively influence quail performance.
基金supported by Ege University Scientific Research Project Commission for the project entitled“Determination of microbi-ological properties of Kombucha produced from different plant sources and identification of probiotic microorganisms found in the product”(Project No:FDK-2021-22943)supported by YÖK(Council of Higher Education)100/2000 Ph.D.Scholarship Program.
文摘The aim of the present study was to evaluate the bioactive properties of plant tea and Kombucha samples produced using Anatolian hawthorn(KH),nettle leaves(KN)and black tea(KC,as control)during storage at 4℃ for 120 days.The total phenolic and flavonoid contents of Kombucha samples were found in the range of 995.33 mg GAE/L-2456.83 mg GAE/L and 75.21 mg CE/L-193.68 mg CE/L,respectively,where the values were higher than plant tea samples.During storage period,total phenolic contents of KC were generally higher than other samples,while higher total flavonoid content,total acidity and ash contents were found in KN.When antioxidant activity was detected by ABTS method,no significant differences was observed between Kombucha samples(89.68%-94.84%),while DPPH method gave higher results in KC than KH and KN.Although antioxidant activity of the samples showed a fluctuation during storage period,higher levels(80.48%-90.36%by ABTS method and 65.60%-70.76%by DPPH method)were observed in KC at the end of the storage(P<0.05),which is compatible with the total phenolic content results.Antimicrobial activities of the samples were examined by detecting minimum inhibitory concentration(MIC)and minimum bactericidal concentration(MBC).MIC values were in the range of 15.63μg/mL-125.00μg/mL.Besides,antimicrobial effect of KN was found higher than KH and KC.However,inhibition effects of Kombucha samples were decreased at the end of the storage time.The results make Anatolian hawthorn and nettle leaves interesting for the production of Kombucha beverages,which have distinct bioactive properties.
文摘Medicinal plants are widely employed for healing reasons in many native systems of medicine and are becoming increasingly popular in modern culture as alternatives to manufactured medications.The current study is a descriptive review in which papers were searched from several databases such as Springer,Wiley,Taylor and Francis,Elsevier,etc.It is time to rethink the way we improve our immune systems and seek evidence-based treatments that best use plant-based medicines to benefit patients.Bioactive principles are responsible for medicinal plants’therapeutic actions and give limitless chances for novel drug leads because of their exceptional availability of chemical variety.The chemical characteristics of the included bioactive components determine whether standardized plant extracts are beneficial or poisonous.A summary of research papers on plants such as garlic,aloe vera,stinging nettle,saffron,clove,holy basil,turmeric,cinnamon,giloe,liquorice,and aloe vera having bioactive molecules and cures for several diseases such as influenza virus,gastrointestinal cancer neurodegenerative disorder,cardiovascular diseases,urinary disorder,diabetes,skin disease,obesity,and respiratory disorder is included in this overview.
文摘Urticaceae includes about 1300 species in 47 genera which largely spread in wet tropical regions,and 341 species in 25 genera are in China.Some species are used in Chinese folk medicine.So far,studies on chemistry and pharmacology of Urticaceous plants are mainly focused on nettle of Urtica L.In this review,the chemical researches on 35 new compounds and related pharmacological effects of the plants in Urticaceae reported during 2000-2010 are described.The 35 new compounds belong to the classes of lignan,secolignan,norlignan,flavonoid,alkaloid,sesquiterpenoid,triterpenoid,sterol,and sphingolipid.The main bioactivities include cytotoxic,antitumor,antimicrobial,antifungal,anti-BPH,anti-HIV,antidiabetic,hypolipidemic,5α-reductase inhibitory,hair regrowth promotion,and anti-oxidative activities.
