Bangladesh’s thriving okra cultivation sector annually yields substantial harvests, yet a significant portion of the plant remains underutilized after harvesting, posing as agricultural waste. This oversight neglects...Bangladesh’s thriving okra cultivation sector annually yields substantial harvests, yet a significant portion of the plant remains underutilized after harvesting, posing as agricultural waste. This oversight neglects the economic potential of okra fiber, which is versatile and valuable across various industries. This paper explores this untapped potential by investigating the physico-mechanical properties, chemical treatments, and fabrication techniques of okra fiber, drawing from a wealth of research. Comparative analyses with established natural fibers like jute and sisal shed light on okra fiber’s transformative role in Bangladesh’s economic landscape. Along with the applications in the fashion world, meticulous investigation into its mechanical, thermal, and morphological characteristics uncovers inherent strengths and integration pathways into industrial applications. Strategies for optimizing yield and quality, including novel approaches like photo-grafting and protein extraction, are explored. Considerations for cytotoxicity and environmental sustainability ensure its viability as a green resource. This research aims to unlock okra fiber’s full potential, positioning Bangladesh for sustainable economic development and innovation.展开更多
[Objective] The aim of the study was to investigate extraction optimization and antioxidant activity of polyphenol in okra flower in order to enhance extraction efficiency and developing value of okra flower. [Method]...[Objective] The aim of the study was to investigate extraction optimization and antioxidant activity of polyphenol in okra flower in order to enhance extraction efficiency and developing value of okra flower. [Method] Optimization of supersonic assisted extraction of phenolic compound in okra flower was investigated using uniform design methodology, and its antioxidant activity was analyzed including reducing power and the capacity of scavenging superoxide anion radicals（O-2·）. [Result]The optimal process parameters of supersonic assisted extraction were as follows：ratio of sample to solvent of 1：35, ethanol concentration of 55%, supersonic time of22 min, and in the extraction condition the experimental yield of phenolic compound was 4.28%. Moreover, phenolic compound in okra flower exhibited stronger antioxidant activities, reducing power of 0.2 mg/ml extraction fluid reached 0.672 and the rate of scavenging O-2· was 13.13%. [Conclusion] The optimization of extraction technology of phenolic compound in okra flower is simple and reliable, the result contributes to the development of phenolic compound in okra flower.展开更多
Objective:To explore the effect of okra extract on gestational diabetes mellitus(GDM) rats and its probable molecular mechanism.Methods:A total of 30 female SD rats were caged with male rats for pregnancy,27 pregnant ...Objective:To explore the effect of okra extract on gestational diabetes mellitus(GDM) rats and its probable molecular mechanism.Methods:A total of 30 female SD rats were caged with male rats for pregnancy,27 pregnant rats were obtained and weighed.The pregnant rats were equally randomized into the control group,GDM group and intervention group.Once the pregnancy was verified,GDM group and intervention group were given 45 mg/kg streptozotocin by peritoneal injection for inducing GDM,control group was given equal volume of citrate buffer.Once the model was established successfully,intervention group was administered orally the solution containing 200 mg/kg/d okra extract,the other groups were given the diet and water only.On the 19 th day of pregnancy,the blood samples and fetal rats of all groups were collected,fetal rats weight and placental weight was recorded and the serum glucose,lipids,serum insulin and C-peptide of pregnant rats before the delivery were determined.Results:The pregnant rats weight before the delivery,fetal rats weight and placental weight of GDM group were lower than control group and intervention group(P<0.05).After the treatment of okra extract,serum glucose and lipids levels of intervention group were both improved significantly(P<0.05),especially,the FBG,HDL,FINS,serum m insulin and hepatic glycogen levels were equivalent to control group(P>0.05).Antioxidant enzymes levels of GDM group in liver and pancreas tissues were lower than the other groups,and after treatment of okra extract,antioxidant enzymes levels in liver and pancreas tissues were equivalent to control group(P>0.05).Conclusions:Okra extract,rich in antioxidant substances,could avoid the excessive consuming of antioxidant enzymes,then,suppresses the oxidative stress and insulin resistance,thereby improving blood glucose level of GDM rats.展开更多
The okra germplasm was screened for salinity tolerance at the seedling stage and during plant ontogeny. Substantial variation existed in okra for salinity tolerance at the seedling stage. An 80 mmol/L NaCI concentrati...The okra germplasm was screened for salinity tolerance at the seedling stage and during plant ontogeny. Substantial variation existed in okra for salinity tolerance at the seedling stage. An 80 mmol/L NaCI concentration was suitable for discriminating tolerant and non-tolerant okra genotypes. The pooled ranking of the genotypes, based on individual rankings for each trait （root and shoot length, germination percentage, and relative Na^＋ and K%＋） in individual NaCI concentrations, was effective for selecting tolerant genotypes. Genotypes selected at the seedling stage maintained their tolerance to NaCI during plant ontogeny, suggesting that screening of the germplasm entries and advanced breeding materials for salt tolerance at the seedling stage is effective. Among 39 okra genotypes, five were identified as the most tolerant genotypes and showed potential for use in breeding programs that focus on the development of salt-tolerant, high-yield okra cultivars.展开更多
The effect of diazotrophs and chemical fertilizers on yield attributing characters and economics of okra cultivation was evaluated. Application of highest dose of NPK @100% in combination with vermicompost (5 t ha-1) ...The effect of diazotrophs and chemical fertilizers on yield attributing characters and economics of okra cultivation was evaluated. Application of highest dose of NPK @100% in combination with vermicompost (5 t ha-1) and biofertilizers with FYM increased the fruit yield of okra (cultivar Mahyco-10) considerably with yield varying between 80.00 q ha-1 to 227.13 q ha-1 and 80.49 q ha-1 to 229.62 q ha-1 during 2010 and 2011 respectively. In okra cv. Utkal Gaurav the fruit yield varied from 47.68 q ha-1 to 129.84 q ha-1 in 2010 and 47.27 q ha-1 to 131.35 q ha-1 in 2011. As regards the net return, highest net profit of Rs 87,630 and Rs. 89,370 ha-1 from the okra was realized over an investment of Rs. 71,360 ha-1 during both the years with a benefit cost ratio of 2.23 and 2.25 when 100% NPK integrated with vermicompost @5t ha-1 and biofertilizers with FYM applied in okra cv.Mahyco-10. The highest net return of Rs. 14,350 in 2010 and Rs. 15,260 in 2011 with an investment of Rs. 63,550 each year was found in cultivar Utkal Gaurav under highest level of nutrient application.展开更多
[Objectives] To establish Qu ECh ERS based extraction method for determining multiple pesticide residues in okra combined with programmed temperature vaporizer-gas chromatography-triple quadrupole mass spectrometry( P...[Objectives] To establish Qu ECh ERS based extraction method for determining multiple pesticide residues in okra combined with programmed temperature vaporizer-gas chromatography-triple quadrupole mass spectrometry( PTV-GC-MS/MS) and ultra high performance liquid chromatography-mass spectrometry( UPLC-MS/MS). [Methods] In this experiment,124 pesticide residues in okra were determined by an optimized Qu ECh ERS method combined with PTV-GC-MS/MS and UPLC-MS/MS. The pesticides in okra were extracted and purified by the optimized Qu ECh ERS pretreatment method and determined by PTV-GC-MS/MS and UPLC-MS/MS. [Results] In this experiment,124 kinds of pesticides had a good linearity with a limit of detection( LOD) of 0. 000 5-0. 008 0 mg/kg; the average recovery rate at three levels was 65. 5%-128. 1% with relative standard deviation of 2. 2%-9. 7%. [Conclusions] This method is simple,rapid,accurate and sensitive,and can provide reliable and valid data support for the determination of multiple pesticide residues in okra by GC-MS/MS and UPLC-MS/MS.展开更多
In this study, the material is okra, a cucurbitaceous largely consumed in West Africa and South Asia. The influence of the external air parameters on food drying with different size, maturity, shape of the material is...In this study, the material is okra, a cucurbitaceous largely consumed in West Africa and South Asia. The influence of the external air parameters on food drying with different size, maturity, shape of the material is considered by convective drying. So, the okra was cut in several parts according to its three characteristic zones, the basis, the middle of the okra and the extremity because the three parts of the vegetable have not the same resistances in transfers by convective drying. The maturity of the okra also has an influence. The okra dries faster in its younger or older age. Okra dries slowly when its maturity is convenient to be consumed. The drying duration of okra with the age of 1, 2, 3, 4 and 5 days is respectively 580, 780, 990, 1200 and 850 min. When we consider the three (matters) constituent of the okra: the skin, the seeds and the central material, the central matter dries faster. The diffusion coefficient was identified in all cases in order to compare the influence of those intrinsic properties of that food.展开更多
A phytobezoar is one of the intraluminal causes of gastric outlet obstruction,especially in patients with previous gastric surgery and/or gastric motility disorders.Before the proton pump inhibitor era,vagotomy,pyloro...A phytobezoar is one of the intraluminal causes of gastric outlet obstruction,especially in patients with previous gastric surgery and/or gastric motility disorders.Before the proton pump inhibitor era,vagotomy,pyloroplasty,gastrectomy and gastrojejunostomy were commonly performed procedures in peptic ulcer patients.One of the sequelae of gastrojejunostomy is phytobezoar formation.However,a bezoar causing gastric outlet obstruction is rare even with giant gastric bezoars.We report a rare case of gastric outlet obstruction due to a phytobezoar obstructing the efferent limb of the gastrojejunostomy site.This phytobezoar which consisted of a whole piece of okra(lady finger vegetable) was successfully removed by endoscopic snare.To the best of our knowledge,this is the first case of okra bezoar-related gastrojejunostomy efferent limb obstruction reported in the literature.展开更多
The insecticidal efficacy of aqueous extracts of R. communis L. and Z. officinales L. was tested in a field study for the control of two important leaf defoliators （Podagrica uniformis and Nisotra sjostedti of okra）...The insecticidal efficacy of aqueous extracts of R. communis L. and Z. officinales L. was tested in a field study for the control of two important leaf defoliators （Podagrica uniformis and Nisotra sjostedti of okra）. The extracts were applied at 10% （w/v） and sprayed every week for five consecutive weeks. R. communis significantly reduced （P〈0.05） abundance of the pests on the 2nd day after spraying and increased the yield of okra. Numbers of fruits and weight yields were significantly higher in plots treated with R. communis compared to plots treated with Z. officinales and the untreated control. R. communis had the same weight yield with Karate （synthetic insecticides）. The results indicated that R. communis could be used to control Podagrica uniformis and Nisotra sjostedti of okra.展开更多
Field trials were conducted to evaluate the epidemiological factors of okra yellow vein mosaic virus (OYVMV). Four varieties of okra were subjected to screening and evaluation of the chemicals. The variety Saloni F1 w...Field trials were conducted to evaluate the epidemiological factors of okra yellow vein mosaic virus (OYVMV). Four varieties of okra were subjected to screening and evaluation of the chemicals. The variety Saloni F1 was highly resistant while Subz Pari was moderately resistant. Diksha was the tolerant variety while Lush Green was moderately susceptible. The chemical Imidacloprid was most effective to control whitefly population and okra yellow vein mosaic virus (OYVMV). Correlation of environmental factors (maximum and minimum temperature, relative humidity and rainfall) with percent plant infection of okra yellow vein mosaic virus (OYVMV) was also determined. There was a significant correlation between environment and disease severity.展开更多
Okra is one of the most popular vegetables in C<span style="white-space:nowrap;"><span style="white-space:nowrap;">ô</span></span>te d’Ivoire which is produced by ...Okra is one of the most popular vegetables in C<span style="white-space:nowrap;"><span style="white-space:nowrap;">ô</span></span>te d’Ivoire which is produced by heavy use of inorganic fertilizers. Vermicompost can be an alternative to inorganic fertilizers. This field study investigated the effect of vermicompost on growth and productivity of okra as compared to inorganic fertilizers. The respective treatments were arranged in a complete randomized block design, each at three replications, during three-season cycles on a ferralitic soil. Results showed that the highest rate of germination was obtained with the vermicompost. The tallest plants of <em>Abelmoschus esculentus</em> (1.88 m) and <em>Abelmoschus caillei</em> (1.78 m) were observed with inorganic fertilizer. The number of leaves per plant registered when using vermicompost was 34.5 and 30.74 with <em>Abelmoschus esculentus </em>and <em>Abelmoschus cailli</em>, respectively. With inorganic fertilizer, the number of leaves per plant was 34.21 (<em>Abelmoschus esculentus</em>) and 32.32 (<em>Abelmoschus cailli</em>). Plants took about 60 days to flower in the control plots and about 46 days in the plots fertilized with the vermicompost and the inorganic fertilizer. The highest pod yields of <em>Abelmoschus esculentus</em> and<em> Abelmoschus cailli</em> were 8.7 t<span style="white-space:nowrap;"><span style="white-space:nowrap;">⋅</span></span>ha<sup><span style="white-space:nowrap;"><span style="color:#222222;font-family:"font-size:14px;white-space:normal;background-color:#FFFFFF;">−</span></span>1</sup> and 10.58 t<span style="white-space:nowrap;"><span style="white-space:nowrap;">⋅</span></span>ha<sup><span style="white-space:nowrap;"><span style="white-space:nowrap;">−</span></span>1</sup> with vermicompost and 8.85 t<span style="white-space:nowrap;"><span style="white-space:nowrap;">⋅</span></span>ha<sup><span style="white-space:nowrap;"><span style="white-space:nowrap;">−</span></span>1</sup> and 10.7 t<span style="white-space:nowrap;"><span style="white-space:nowrap;">⋅</span></span>ha<sup><span style="white-space:nowrap;"><span style="white-space:nowrap;">−</span></span>1</sup> with inorganic fertilizer, respectively. Vermicompost could be recommended as an alternative to inorganic fertilizer to produce okra on ferralitic soil in C<span style="white-space:nowrap;">ô</span>te d’Ivoire.展开更多
To counteract the effects of drought stress,scientists have adopted several approaches including the use of different chemicals both inorganic and organic,which is contemplated as a highly efficient and cost-effective...To counteract the effects of drought stress,scientists have adopted several approaches including the use of different chemicals both inorganic and organic,which is contemplated as a highly efficient and cost-effective shot-gun approach.Ascorbic acid(AsA)is a potential organic substance,which widely occurs in plants,and is considered to be an effective antioxidant to counteract reactive oxygen species(ROS).Thus,a pot experiment was performed to assess the relative mitigating impacts of synthetic AsA and naturally occurring AsA in the form of lemon juice(LJ)and orange juice(OJ)on two cultivars of okra(Abelmoschus esculentus L.)namely Sabz Pari and Bhindi Sanwali under varying water deficit conditions.After 30 days of seed germination,okra seedlings were subjected to different irrigation regimes,i.e.,water deficit stress[(65%and 50%F.C.)and control conditions(100%F.C.)].Different levels of AsA[control(no spray),14 mg L^(−1)LJ,24 mg L^(−1)OJ and 150 mg L^(−1)AsA]obtained from different sources were applied as a foliar spray to control and water-stressed plants.Drought stress prominently reduced plant growth and yield attributes of the okra cultivars.Water-deficit conditions(65%and 50%F.C.)substantially decreased the fruit chlorophyll(a,b)pigments and the activity of superoxide dismutase(SOD)enzyme,while an increase was observed in the contents of fruit’s hydrogen peroxide(H_(2)O_(2)),malondialdehyde(MDA),total phenolics,total soluble sugars,AsA,and total soluble proteins.Drought stress also increased the activities of antioxidant enzymes like peroxidase(POD)and catalase(CAT).However,plant growth and yield attributes,fruit chlorophyll pigments,total phenolics,total soluble sugars,total free amino acids,total soluble proteins,AsA,GB,H_(2)O_(2),and the activities of antioxidant enzymes(POD and CAT)were increased by the AsA exogenous treatment in both okra cultivars under water deficit and control conditions.Overall,LJ and OJ were more effective than the synthetic AsA in upregulating the physiological and metabolic processes of okra plants.So,cost-effective as well as multi-nutrient natural sources of AsA could be suggested for alleviating the harmful effects of water deficit stress on plants.展开更多
The objective of this work was to investigate the effect of okra pectin from two genotypes (</span><span style="font-family:Verdana;"><i></span><i><span style="font-fami...The objective of this work was to investigate the effect of okra pectin from two genotypes (</span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">asha</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> and </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">agbagoma</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;">) on the physicochemical, sensory and microbial quality of yoghurt. Okra pectin concentration</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;"> (w/w pectin to milk powder ratios) of 0.2%, 0.4% and 0.6% were used in the yoghurt preparation and its water holding capacity, titratable acidity and pH were analyzed against a control (0.0% pectin) weekly for a month. Consumer acceptability tests for the yoghurt samples were carried out using 50 untrained panellists on a 7-point hedonic scale. Total aerobic microorganisms present in the most preferred samples were enumerated over a four-week period. Results indicated that samples containing 0.2% </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">asha</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> pectin were most preferred by panelists. Water holding capacity varied significantly with those containing </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">asha</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> pectin higher than </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">agbagoma</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> counterparts and the control. There was a decline in pH with increasing pectin concentration and over the storage period. Samples containing </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">agbagoma</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> pectin had lower pH (3.60</span><span style="font-family:""> </span><span style="font-family:Verdana;">-</span><span style="font-family:""> </span><span style="font-family:Verdana;">4.32) compared to samples containing </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">asha</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> pectin (4.22</span><span style="font-family:""> </span><span style="font-family:Verdana;">-</span><span style="font-family:""> </span><span style="font-family:Verdana;">4.45). Titratable acidity increased during the storage period and with increasing pectin concentration. After four weeks of storage at 4</span><span style="font-family:Verdana;">°</span><span style="font-family:Verdana;">C sample containing 0.2% </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">agbagoma</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> pectin had the least microbial count (7.6</span><span style="font-family:""> </span><span style="font-family:Verdana;">×</span><span style="font-family:""> </span><span style="font-family:""><span style="font-family:Verdana;">10</span><sup><span style="font-family:Verdana;">5</span></sup><span style="font-family:Verdana;"> ± 4.51 cfu/g), followed by the sample containing 0.2% </span></span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">asha</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> pectin (2.4</span><span style="font-family:""> </span><span style="font-family:Verdana;">×</span><span style="font-family:""> </span><span style="font-family:""><span style="font-family:Verdana;">10</span><sup><span style="font-family:Verdana;">7</span></sup><span style="font-family:Verdana;"> ± 11.14 cfu/g) and the control (8.6</span></span><span style="font-family:""> </span><span style="font-family:Verdana;">×</span><span style="font-family:""> </span><span style="font-family:""><span style="font-family:Verdana;">10</span><sup><span style="font-family:Verdana;">7</span></sup><span style="font-family:Verdana;"> ± 5.57</span></span><span style="font-family:""> </span><span style="font-family:Verdana;">cfu/g). The study revealed that addition of okra pectin at 0.2% improved the consumer acceptability of yoghurt and 0.2% </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">agbagoma</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> pectin inhibits the proliferation of aerobic microbes. Addition of okra pectin also improved the water holding capacity and reduced whey exudation.展开更多
In this paper, we propose an optimized process for farm product convective drying. Above and beyond the influence of the air parameters on foodstuff convective drying, this work shows that product internal parameters ...In this paper, we propose an optimized process for farm product convective drying. Above and beyond the influence of the air parameters on foodstuff convective drying, this work shows that product internal parameters and drying proceedings must be taken into account during the evaluation of their convective drying. Results indicate that okra maturity influences its convective drying. It dries faster when it is too young or when it is advanced age. Drying time of okra of 1, 2, 3, 4 and 5 days old is respectively 580 min, 780 min, 990 min, 1200 min and 850 min. Also, one observes that considering okra on its three zones according it length, i.e. its base, middle and extremity parts have not the same resistance to transfers during convective drying. These three zones have respectively 400 min, 520 min and 600 min of drying time. Okra cut reveals a major importance on its convective drying evaluation. The longitudinal cut di-viding okra on four parts, sliced with 5 mm and 10 mm of thickness and the whole okra put respectively 150 min, 200 min, 280 min and 400 min for their drying. At last, three (03) different constituents of okra, namely, the skin, the seeds and central material behave differently during convective drying. The drying time of the central material, the seeds and the skin is about 70 min, 150 min and 190 min respectively, against 400 min for the whole okra.展开更多
The present study demonstrates the sorptive efficiency of okra leaves for the Cr(III) and Cr(VI) in aqueous system. The batch dynamic sorption method was carried out as the function of the pH of the solution, sorbent ...The present study demonstrates the sorptive efficiency of okra leaves for the Cr(III) and Cr(VI) in aqueous system. The batch dynamic sorption method was carried out as the function of the pH of the solution, sorbent doze, initial bulk concentration, shaking speed and contact time. The experimental data were examined by Langmuir and Freundlich isotherms. Cr(III) at pH-4.0 and Cr(VI) pH-2.0 showed a maximum sorption capacities 221.17 mg/g and 81.94 mg/g respectively. Kinetically experimental data of both chromium species were well fitted to pseudo second order rate, Elovich, Morris-Weber and Richenberg equations. Positive values of enthalpy change and negative values of Gibbs free energy indicated the endothermic and spontaneous nature of sorption reaction respectively. The developed method was applied to real ground water samples (affected by industrial wastewater). Up to 92.15% of chromium metal was removed from the real water samples.展开更多
The use of new food grade polysaccharides (mucilage) obtained from Hibiscus esculentus and Trigonella foenum graceum,commonly called Okra and Fenugreek,respectively,as flocculants was described.These polysaccharides w...The use of new food grade polysaccharides (mucilage) obtained from Hibiscus esculentus and Trigonella foenum graceum,commonly called Okra and Fenugreek,respectively,as flocculants was described.These polysaccharides were used for removal of solids (suspended solids (SS) and total dissolved solids (TDS)) and dyes from real textile effluents and aqueous solutions of different class of synthetic dyes.Influences of varying polysaccharide concentration,contact time and pH on removal of pollutant from the textile...展开更多
An experimental study for the drying kinetics of whole okra was carried out. In the study, different ages were considered by taking into account influence of okra maturity on its convective drying. The 2D moisture evo...An experimental study for the drying kinetics of whole okra was carried out. In the study, different ages were considered by taking into account influence of okra maturity on its convective drying. The 2D moisture evolution inside the product and its maturity were evaluated by fitting experimental data versus drying time. The water effective diffusion coefficient of okra at different maturity states was gotten by the experimental model using Fick’s second law. A parametric study was carried out in the ranging of okra age from 2 to 7 days at 60℃, both fruits gathered on the same plant to avoid divergences due to okra varieties that can induce difference on physical structure and the chemical composition. It was found from the experimental results that okra maturity has important influence on its behaviour during convective drying. At 2, 3, 4, 5 and 7 days old, the drying effective time was respectively 780, 1000, 1155, 850 and 750 min. Effective diffusivity of the okra in this order of age was 1.38 × 10-10, 6.09 × 10-11, 1.23 × 10-11, 8.98 × 10-11, and 1.05 × 10-10 m2/s in the present study, while the average initial moisture content was respectively 12.27, 9.00, 7.53, 5.97 and 4.92 Kgw/Kgdm.展开更多
Convolvulus arvensis is a toxic allelopathic weed that suppresses germination and growth of crops. The prime object of present study was to investigate effect of Convolvulus arvensis water extract on germination and p...Convolvulus arvensis is a toxic allelopathic weed that suppresses germination and growth of crops. The prime object of present study was to investigate effect of Convolvulus arvensis water extract on germination and performance of okra with different seed sizes. The seeds of okra variety pusa green were separated into three different sizes, viz large size （4.00-5.00 mm）, medium size （3.00-3.50 mm） and small size （2.00-3.50 mm）, and then soaked in allelopathic plant bindweed water extract and kept in patrisdishes for germination into the germinator at 15℃. The experiment was laid out using Complete Randomized Design （CRD） with three replications. The results showed that after sowing of 12 days the highest germination was observed in non-treated seeds as compared to seeds treated in Convolvulus arvensis water extract for 1 h, further non-treated large seeds produced maximum plants as compared to treated small seeds after sowing of 24 days. Meanwhile, root length, shoot length, root fresh and dry weight, shoot fresh and dry weight were recorded higher in non-treated large seeds as compared to small seeds soaked for 1 h in Convolvulus arvensis allelopthic water extract. It could be found that Convolvulus arvensis affected germination, seed growth and overall performance of okra, further presence Convolvulus arvensis in crops could cause negative impact on germination and integrity of okra crops.展开更多
As a representative of chronic wounds,the long-term high levels of oxidative stress and blood sugar in chronic diabetic wounds lead to serious complications,making them the biggest challenge in the research on wound h...As a representative of chronic wounds,the long-term high levels of oxidative stress and blood sugar in chronic diabetic wounds lead to serious complications,making them the biggest challenge in the research on wound healing.Many edible natural biomaterials rich in terpenes,phenols,and flavonoids can act as efficient antioxidants.In this study,okra extract was selected as the main component of a wound dressing.The okra extracts obtained via different methods comprehensively maintained the bioactivity of multiple molecules.The robust antioxidant properties of okra significantly reduced intracellular reactive oxygen species production,thereby accelerating the wound healing process.The results showed that okra extracts and their hydrogel dressings increased cell migration,angiogenesis,and re-epithelization of the chronic wound area,considerably promoting wound remodeling in diabetic rats.Therefore,okra-based hydrogels are promising candidates for skin regeneration and wider tissue engineering applications.展开更多
Three different proteolytic enzymes (pepsin, trypsin and papain) were used to prepare okra seed protein concentrate and okra seed protein isolate hydrolysates. The hydrolysates were assayed for antioxidant properties ...Three different proteolytic enzymes (pepsin, trypsin and papain) were used to prepare okra seed protein concentrate and okra seed protein isolate hydrolysates. The hydrolysates were assayed for antioxidant properties using radical scavenging, reducing power and metal chelating assays. The highest degree of hydrolysis (after 360 min) for okra protein isolates was 35.20%, 35.21% and 10.53% for pepsin, papain and trypsin respectively. The highest degree of hydrolysis (after 360 min) for okra protein concentrates was 26.8%, 28.59% and 6.47% for pepsin, papain and trypsin respectively. Pepsin hydrolysates showed higher metal chelating activity and radical scavenging activity than trypsin and papain hydrolysates. Trypsin hydrolysates showed the lowest antioxidant activities, which may be due to the low degree of hydrolysis. In general, for antioxidant activity, there was an increase in activity with an increase in the degree of hydrolysis. Similar antioxidant activity was found in both the okra protein isolate and concentrate hydrolysates except for metal chelating activity which was higher in okra protein isolate hydrolysates. This may be due to the higher ash concentration in the concentrates (9.4% in concentrates vs. 2.6% in isolates). In this study, pepsin hydrolysates with a final DH of 35.2% showed higher reducing power and metal chelating activity than trypsin and papain hydrolysates. Okra protein hydrolysates were found to have varying levels of antioxidant activity, which was dependent on the specificity of the protease and proportional to the degree of hydrolysis achieved.展开更多
文摘Bangladesh’s thriving okra cultivation sector annually yields substantial harvests, yet a significant portion of the plant remains underutilized after harvesting, posing as agricultural waste. This oversight neglects the economic potential of okra fiber, which is versatile and valuable across various industries. This paper explores this untapped potential by investigating the physico-mechanical properties, chemical treatments, and fabrication techniques of okra fiber, drawing from a wealth of research. Comparative analyses with established natural fibers like jute and sisal shed light on okra fiber’s transformative role in Bangladesh’s economic landscape. Along with the applications in the fashion world, meticulous investigation into its mechanical, thermal, and morphological characteristics uncovers inherent strengths and integration pathways into industrial applications. Strategies for optimizing yield and quality, including novel approaches like photo-grafting and protein extraction, are explored. Considerations for cytotoxicity and environmental sustainability ensure its viability as a green resource. This research aims to unlock okra fiber’s full potential, positioning Bangladesh for sustainable economic development and innovation.
基金Supported by Science and Technology Project of Guangdong Province(No.2014B040404027)Science and Technology Project of Gaozhou City(No.2014005)~~
文摘[Objective] The aim of the study was to investigate extraction optimization and antioxidant activity of polyphenol in okra flower in order to enhance extraction efficiency and developing value of okra flower. [Method] Optimization of supersonic assisted extraction of phenolic compound in okra flower was investigated using uniform design methodology, and its antioxidant activity was analyzed including reducing power and the capacity of scavenging superoxide anion radicals（O-2·）. [Result]The optimal process parameters of supersonic assisted extraction were as follows：ratio of sample to solvent of 1：35, ethanol concentration of 55%, supersonic time of22 min, and in the extraction condition the experimental yield of phenolic compound was 4.28%. Moreover, phenolic compound in okra flower exhibited stronger antioxidant activities, reducing power of 0.2 mg/ml extraction fluid reached 0.672 and the rate of scavenging O-2· was 13.13%. [Conclusion] The optimization of extraction technology of phenolic compound in okra flower is simple and reliable, the result contributes to the development of phenolic compound in okra flower.
文摘Objective:To explore the effect of okra extract on gestational diabetes mellitus(GDM) rats and its probable molecular mechanism.Methods:A total of 30 female SD rats were caged with male rats for pregnancy,27 pregnant rats were obtained and weighed.The pregnant rats were equally randomized into the control group,GDM group and intervention group.Once the pregnancy was verified,GDM group and intervention group were given 45 mg/kg streptozotocin by peritoneal injection for inducing GDM,control group was given equal volume of citrate buffer.Once the model was established successfully,intervention group was administered orally the solution containing 200 mg/kg/d okra extract,the other groups were given the diet and water only.On the 19 th day of pregnancy,the blood samples and fetal rats of all groups were collected,fetal rats weight and placental weight was recorded and the serum glucose,lipids,serum insulin and C-peptide of pregnant rats before the delivery were determined.Results:The pregnant rats weight before the delivery,fetal rats weight and placental weight of GDM group were lower than control group and intervention group(P<0.05).After the treatment of okra extract,serum glucose and lipids levels of intervention group were both improved significantly(P<0.05),especially,the FBG,HDL,FINS,serum m insulin and hepatic glycogen levels were equivalent to control group(P>0.05).Antioxidant enzymes levels of GDM group in liver and pancreas tissues were lower than the other groups,and after treatment of okra extract,antioxidant enzymes levels in liver and pancreas tissues were equivalent to control group(P>0.05).Conclusions:Okra extract,rich in antioxidant substances,could avoid the excessive consuming of antioxidant enzymes,then,suppresses the oxidative stress and insulin resistance,thereby improving blood glucose level of GDM rats.
基金Project supported by the Indigenous 5000 Fellowship Program(Batch II)of the Higher Education Commission,Pakistan
文摘The okra germplasm was screened for salinity tolerance at the seedling stage and during plant ontogeny. Substantial variation existed in okra for salinity tolerance at the seedling stage. An 80 mmol/L NaCI concentration was suitable for discriminating tolerant and non-tolerant okra genotypes. The pooled ranking of the genotypes, based on individual rankings for each trait （root and shoot length, germination percentage, and relative Na^＋ and K%＋） in individual NaCI concentrations, was effective for selecting tolerant genotypes. Genotypes selected at the seedling stage maintained their tolerance to NaCI during plant ontogeny, suggesting that screening of the germplasm entries and advanced breeding materials for salt tolerance at the seedling stage is effective. Among 39 okra genotypes, five were identified as the most tolerant genotypes and showed potential for use in breeding programs that focus on the development of salt-tolerant, high-yield okra cultivars.
文摘The effect of diazotrophs and chemical fertilizers on yield attributing characters and economics of okra cultivation was evaluated. Application of highest dose of NPK @100% in combination with vermicompost (5 t ha-1) and biofertilizers with FYM increased the fruit yield of okra (cultivar Mahyco-10) considerably with yield varying between 80.00 q ha-1 to 227.13 q ha-1 and 80.49 q ha-1 to 229.62 q ha-1 during 2010 and 2011 respectively. In okra cv. Utkal Gaurav the fruit yield varied from 47.68 q ha-1 to 129.84 q ha-1 in 2010 and 47.27 q ha-1 to 131.35 q ha-1 in 2011. As regards the net return, highest net profit of Rs 87,630 and Rs. 89,370 ha-1 from the okra was realized over an investment of Rs. 71,360 ha-1 during both the years with a benefit cost ratio of 2.23 and 2.25 when 100% NPK integrated with vermicompost @5t ha-1 and biofertilizers with FYM applied in okra cv.Mahyco-10. The highest net return of Rs. 14,350 in 2010 and Rs. 15,260 in 2011 with an investment of Rs. 63,550 each year was found in cultivar Utkal Gaurav under highest level of nutrient application.
基金Supported by Science and Technology Planning Project of Guangdong Province(2014A040401008)
文摘[Objectives] To establish Qu ECh ERS based extraction method for determining multiple pesticide residues in okra combined with programmed temperature vaporizer-gas chromatography-triple quadrupole mass spectrometry( PTV-GC-MS/MS) and ultra high performance liquid chromatography-mass spectrometry( UPLC-MS/MS). [Methods] In this experiment,124 pesticide residues in okra were determined by an optimized Qu ECh ERS method combined with PTV-GC-MS/MS and UPLC-MS/MS. The pesticides in okra were extracted and purified by the optimized Qu ECh ERS pretreatment method and determined by PTV-GC-MS/MS and UPLC-MS/MS. [Results] In this experiment,124 kinds of pesticides had a good linearity with a limit of detection( LOD) of 0. 000 5-0. 008 0 mg/kg; the average recovery rate at three levels was 65. 5%-128. 1% with relative standard deviation of 2. 2%-9. 7%. [Conclusions] This method is simple,rapid,accurate and sensitive,and can provide reliable and valid data support for the determination of multiple pesticide residues in okra by GC-MS/MS and UPLC-MS/MS.
文摘In this study, the material is okra, a cucurbitaceous largely consumed in West Africa and South Asia. The influence of the external air parameters on food drying with different size, maturity, shape of the material is considered by convective drying. So, the okra was cut in several parts according to its three characteristic zones, the basis, the middle of the okra and the extremity because the three parts of the vegetable have not the same resistances in transfers by convective drying. The maturity of the okra also has an influence. The okra dries faster in its younger or older age. Okra dries slowly when its maturity is convenient to be consumed. The drying duration of okra with the age of 1, 2, 3, 4 and 5 days is respectively 580, 780, 990, 1200 and 850 min. When we consider the three (matters) constituent of the okra: the skin, the seeds and the central material, the central matter dries faster. The diffusion coefficient was identified in all cases in order to compare the influence of those intrinsic properties of that food.
文摘A phytobezoar is one of the intraluminal causes of gastric outlet obstruction,especially in patients with previous gastric surgery and/or gastric motility disorders.Before the proton pump inhibitor era,vagotomy,pyloroplasty,gastrectomy and gastrojejunostomy were commonly performed procedures in peptic ulcer patients.One of the sequelae of gastrojejunostomy is phytobezoar formation.However,a bezoar causing gastric outlet obstruction is rare even with giant gastric bezoars.We report a rare case of gastric outlet obstruction due to a phytobezoar obstructing the efferent limb of the gastrojejunostomy site.This phytobezoar which consisted of a whole piece of okra(lady finger vegetable) was successfully removed by endoscopic snare.To the best of our knowledge,this is the first case of okra bezoar-related gastrojejunostomy efferent limb obstruction reported in the literature.
文摘The insecticidal efficacy of aqueous extracts of R. communis L. and Z. officinales L. was tested in a field study for the control of two important leaf defoliators （Podagrica uniformis and Nisotra sjostedti of okra）. The extracts were applied at 10% （w/v） and sprayed every week for five consecutive weeks. R. communis significantly reduced （P〈0.05） abundance of the pests on the 2nd day after spraying and increased the yield of okra. Numbers of fruits and weight yields were significantly higher in plots treated with R. communis compared to plots treated with Z. officinales and the untreated control. R. communis had the same weight yield with Karate （synthetic insecticides）. The results indicated that R. communis could be used to control Podagrica uniformis and Nisotra sjostedti of okra.
文摘Field trials were conducted to evaluate the epidemiological factors of okra yellow vein mosaic virus (OYVMV). Four varieties of okra were subjected to screening and evaluation of the chemicals. The variety Saloni F1 was highly resistant while Subz Pari was moderately resistant. Diksha was the tolerant variety while Lush Green was moderately susceptible. The chemical Imidacloprid was most effective to control whitefly population and okra yellow vein mosaic virus (OYVMV). Correlation of environmental factors (maximum and minimum temperature, relative humidity and rainfall) with percent plant infection of okra yellow vein mosaic virus (OYVMV) was also determined. There was a significant correlation between environment and disease severity.
文摘Okra is one of the most popular vegetables in C<span style="white-space:nowrap;"><span style="white-space:nowrap;">ô</span></span>te d’Ivoire which is produced by heavy use of inorganic fertilizers. Vermicompost can be an alternative to inorganic fertilizers. This field study investigated the effect of vermicompost on growth and productivity of okra as compared to inorganic fertilizers. The respective treatments were arranged in a complete randomized block design, each at three replications, during three-season cycles on a ferralitic soil. Results showed that the highest rate of germination was obtained with the vermicompost. The tallest plants of <em>Abelmoschus esculentus</em> (1.88 m) and <em>Abelmoschus caillei</em> (1.78 m) were observed with inorganic fertilizer. The number of leaves per plant registered when using vermicompost was 34.5 and 30.74 with <em>Abelmoschus esculentus </em>and <em>Abelmoschus cailli</em>, respectively. With inorganic fertilizer, the number of leaves per plant was 34.21 (<em>Abelmoschus esculentus</em>) and 32.32 (<em>Abelmoschus cailli</em>). Plants took about 60 days to flower in the control plots and about 46 days in the plots fertilized with the vermicompost and the inorganic fertilizer. The highest pod yields of <em>Abelmoschus esculentus</em> and<em> Abelmoschus cailli</em> were 8.7 t<span style="white-space:nowrap;"><span style="white-space:nowrap;">⋅</span></span>ha<sup><span style="white-space:nowrap;"><span style="color:#222222;font-family:"font-size:14px;white-space:normal;background-color:#FFFFFF;">−</span></span>1</sup> and 10.58 t<span style="white-space:nowrap;"><span style="white-space:nowrap;">⋅</span></span>ha<sup><span style="white-space:nowrap;"><span style="white-space:nowrap;">−</span></span>1</sup> with vermicompost and 8.85 t<span style="white-space:nowrap;"><span style="white-space:nowrap;">⋅</span></span>ha<sup><span style="white-space:nowrap;"><span style="white-space:nowrap;">−</span></span>1</sup> and 10.7 t<span style="white-space:nowrap;"><span style="white-space:nowrap;">⋅</span></span>ha<sup><span style="white-space:nowrap;"><span style="white-space:nowrap;">−</span></span>1</sup> with inorganic fertilizer, respectively. Vermicompost could be recommended as an alternative to inorganic fertilizer to produce okra on ferralitic soil in C<span style="white-space:nowrap;">ô</span>te d’Ivoire.
文摘To counteract the effects of drought stress,scientists have adopted several approaches including the use of different chemicals both inorganic and organic,which is contemplated as a highly efficient and cost-effective shot-gun approach.Ascorbic acid(AsA)is a potential organic substance,which widely occurs in plants,and is considered to be an effective antioxidant to counteract reactive oxygen species(ROS).Thus,a pot experiment was performed to assess the relative mitigating impacts of synthetic AsA and naturally occurring AsA in the form of lemon juice(LJ)and orange juice(OJ)on two cultivars of okra(Abelmoschus esculentus L.)namely Sabz Pari and Bhindi Sanwali under varying water deficit conditions.After 30 days of seed germination,okra seedlings were subjected to different irrigation regimes,i.e.,water deficit stress[(65%and 50%F.C.)and control conditions(100%F.C.)].Different levels of AsA[control(no spray),14 mg L^(−1)LJ,24 mg L^(−1)OJ and 150 mg L^(−1)AsA]obtained from different sources were applied as a foliar spray to control and water-stressed plants.Drought stress prominently reduced plant growth and yield attributes of the okra cultivars.Water-deficit conditions(65%and 50%F.C.)substantially decreased the fruit chlorophyll(a,b)pigments and the activity of superoxide dismutase(SOD)enzyme,while an increase was observed in the contents of fruit’s hydrogen peroxide(H_(2)O_(2)),malondialdehyde(MDA),total phenolics,total soluble sugars,AsA,and total soluble proteins.Drought stress also increased the activities of antioxidant enzymes like peroxidase(POD)and catalase(CAT).However,plant growth and yield attributes,fruit chlorophyll pigments,total phenolics,total soluble sugars,total free amino acids,total soluble proteins,AsA,GB,H_(2)O_(2),and the activities of antioxidant enzymes(POD and CAT)were increased by the AsA exogenous treatment in both okra cultivars under water deficit and control conditions.Overall,LJ and OJ were more effective than the synthetic AsA in upregulating the physiological and metabolic processes of okra plants.So,cost-effective as well as multi-nutrient natural sources of AsA could be suggested for alleviating the harmful effects of water deficit stress on plants.
文摘The objective of this work was to investigate the effect of okra pectin from two genotypes (</span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">asha</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> and </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">agbagoma</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;">) on the physicochemical, sensory and microbial quality of yoghurt. Okra pectin concentration</span><span style="font-family:Verdana;">s</span><span style="font-family:Verdana;"> (w/w pectin to milk powder ratios) of 0.2%, 0.4% and 0.6% were used in the yoghurt preparation and its water holding capacity, titratable acidity and pH were analyzed against a control (0.0% pectin) weekly for a month. Consumer acceptability tests for the yoghurt samples were carried out using 50 untrained panellists on a 7-point hedonic scale. Total aerobic microorganisms present in the most preferred samples were enumerated over a four-week period. Results indicated that samples containing 0.2% </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">asha</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> pectin were most preferred by panelists. Water holding capacity varied significantly with those containing </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">asha</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> pectin higher than </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">agbagoma</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> counterparts and the control. There was a decline in pH with increasing pectin concentration and over the storage period. Samples containing </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">agbagoma</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> pectin had lower pH (3.60</span><span style="font-family:""> </span><span style="font-family:Verdana;">-</span><span style="font-family:""> </span><span style="font-family:Verdana;">4.32) compared to samples containing </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">asha</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> pectin (4.22</span><span style="font-family:""> </span><span style="font-family:Verdana;">-</span><span style="font-family:""> </span><span style="font-family:Verdana;">4.45). Titratable acidity increased during the storage period and with increasing pectin concentration. After four weeks of storage at 4</span><span style="font-family:Verdana;">°</span><span style="font-family:Verdana;">C sample containing 0.2% </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">agbagoma</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> pectin had the least microbial count (7.6</span><span style="font-family:""> </span><span style="font-family:Verdana;">×</span><span style="font-family:""> </span><span style="font-family:""><span style="font-family:Verdana;">10</span><sup><span style="font-family:Verdana;">5</span></sup><span style="font-family:Verdana;"> ± 4.51 cfu/g), followed by the sample containing 0.2% </span></span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">asha</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> pectin (2.4</span><span style="font-family:""> </span><span style="font-family:Verdana;">×</span><span style="font-family:""> </span><span style="font-family:""><span style="font-family:Verdana;">10</span><sup><span style="font-family:Verdana;">7</span></sup><span style="font-family:Verdana;"> ± 11.14 cfu/g) and the control (8.6</span></span><span style="font-family:""> </span><span style="font-family:Verdana;">×</span><span style="font-family:""> </span><span style="font-family:""><span style="font-family:Verdana;">10</span><sup><span style="font-family:Verdana;">7</span></sup><span style="font-family:Verdana;"> ± 5.57</span></span><span style="font-family:""> </span><span style="font-family:Verdana;">cfu/g). The study revealed that addition of okra pectin at 0.2% improved the consumer acceptability of yoghurt and 0.2% </span><span style="font-family:Verdana;"><i></span><i><span style="font-family:Verdana;">agbagoma</span></i><i><span style="font-family:Verdana;"></i></span></i><span style="font-family:Verdana;"> pectin inhibits the proliferation of aerobic microbes. Addition of okra pectin also improved the water holding capacity and reduced whey exudation.
文摘In this paper, we propose an optimized process for farm product convective drying. Above and beyond the influence of the air parameters on foodstuff convective drying, this work shows that product internal parameters and drying proceedings must be taken into account during the evaluation of their convective drying. Results indicate that okra maturity influences its convective drying. It dries faster when it is too young or when it is advanced age. Drying time of okra of 1, 2, 3, 4 and 5 days old is respectively 580 min, 780 min, 990 min, 1200 min and 850 min. Also, one observes that considering okra on its three zones according it length, i.e. its base, middle and extremity parts have not the same resistance to transfers during convective drying. These three zones have respectively 400 min, 520 min and 600 min of drying time. Okra cut reveals a major importance on its convective drying evaluation. The longitudinal cut di-viding okra on four parts, sliced with 5 mm and 10 mm of thickness and the whole okra put respectively 150 min, 200 min, 280 min and 400 min for their drying. At last, three (03) different constituents of okra, namely, the skin, the seeds and central material behave differently during convective drying. The drying time of the central material, the seeds and the skin is about 70 min, 150 min and 190 min respectively, against 400 min for the whole okra.
文摘The present study demonstrates the sorptive efficiency of okra leaves for the Cr(III) and Cr(VI) in aqueous system. The batch dynamic sorption method was carried out as the function of the pH of the solution, sorbent doze, initial bulk concentration, shaking speed and contact time. The experimental data were examined by Langmuir and Freundlich isotherms. Cr(III) at pH-4.0 and Cr(VI) pH-2.0 showed a maximum sorption capacities 221.17 mg/g and 81.94 mg/g respectively. Kinetically experimental data of both chromium species were well fitted to pseudo second order rate, Elovich, Morris-Weber and Richenberg equations. Positive values of enthalpy change and negative values of Gibbs free energy indicated the endothermic and spontaneous nature of sorption reaction respectively. The developed method was applied to real ground water samples (affected by industrial wastewater). Up to 92.15% of chromium metal was removed from the real water samples.
文摘The use of new food grade polysaccharides (mucilage) obtained from Hibiscus esculentus and Trigonella foenum graceum,commonly called Okra and Fenugreek,respectively,as flocculants was described.These polysaccharides were used for removal of solids (suspended solids (SS) and total dissolved solids (TDS)) and dyes from real textile effluents and aqueous solutions of different class of synthetic dyes.Influences of varying polysaccharide concentration,contact time and pH on removal of pollutant from the textile...
文摘An experimental study for the drying kinetics of whole okra was carried out. In the study, different ages were considered by taking into account influence of okra maturity on its convective drying. The 2D moisture evolution inside the product and its maturity were evaluated by fitting experimental data versus drying time. The water effective diffusion coefficient of okra at different maturity states was gotten by the experimental model using Fick’s second law. A parametric study was carried out in the ranging of okra age from 2 to 7 days at 60℃, both fruits gathered on the same plant to avoid divergences due to okra varieties that can induce difference on physical structure and the chemical composition. It was found from the experimental results that okra maturity has important influence on its behaviour during convective drying. At 2, 3, 4, 5 and 7 days old, the drying effective time was respectively 780, 1000, 1155, 850 and 750 min. Effective diffusivity of the okra in this order of age was 1.38 × 10-10, 6.09 × 10-11, 1.23 × 10-11, 8.98 × 10-11, and 1.05 × 10-10 m2/s in the present study, while the average initial moisture content was respectively 12.27, 9.00, 7.53, 5.97 and 4.92 Kgw/Kgdm.
文摘Convolvulus arvensis is a toxic allelopathic weed that suppresses germination and growth of crops. The prime object of present study was to investigate effect of Convolvulus arvensis water extract on germination and performance of okra with different seed sizes. The seeds of okra variety pusa green were separated into three different sizes, viz large size （4.00-5.00 mm）, medium size （3.00-3.50 mm） and small size （2.00-3.50 mm）, and then soaked in allelopathic plant bindweed water extract and kept in patrisdishes for germination into the germinator at 15℃. The experiment was laid out using Complete Randomized Design （CRD） with three replications. The results showed that after sowing of 12 days the highest germination was observed in non-treated seeds as compared to seeds treated in Convolvulus arvensis water extract for 1 h, further non-treated large seeds produced maximum plants as compared to treated small seeds after sowing of 24 days. Meanwhile, root length, shoot length, root fresh and dry weight, shoot fresh and dry weight were recorded higher in non-treated large seeds as compared to small seeds soaked for 1 h in Convolvulus arvensis allelopthic water extract. It could be found that Convolvulus arvensis affected germination, seed growth and overall performance of okra, further presence Convolvulus arvensis in crops could cause negative impact on germination and integrity of okra crops.
基金Thanks to the following fund projects for their support to this work:National Natural Science Foundation of China(Nos.51973243 and 52173150)International Cooperation and Exchange of the National Natural Science Foundation of China(No.51820105004)Shenzhen Basic Research Project(No.JCYJ20190807155801657).
文摘As a representative of chronic wounds,the long-term high levels of oxidative stress and blood sugar in chronic diabetic wounds lead to serious complications,making them the biggest challenge in the research on wound healing.Many edible natural biomaterials rich in terpenes,phenols,and flavonoids can act as efficient antioxidants.In this study,okra extract was selected as the main component of a wound dressing.The okra extracts obtained via different methods comprehensively maintained the bioactivity of multiple molecules.The robust antioxidant properties of okra significantly reduced intracellular reactive oxygen species production,thereby accelerating the wound healing process.The results showed that okra extracts and their hydrogel dressings increased cell migration,angiogenesis,and re-epithelization of the chronic wound area,considerably promoting wound remodeling in diabetic rats.Therefore,okra-based hydrogels are promising candidates for skin regeneration and wider tissue engineering applications.
文摘Three different proteolytic enzymes (pepsin, trypsin and papain) were used to prepare okra seed protein concentrate and okra seed protein isolate hydrolysates. The hydrolysates were assayed for antioxidant properties using radical scavenging, reducing power and metal chelating assays. The highest degree of hydrolysis (after 360 min) for okra protein isolates was 35.20%, 35.21% and 10.53% for pepsin, papain and trypsin respectively. The highest degree of hydrolysis (after 360 min) for okra protein concentrates was 26.8%, 28.59% and 6.47% for pepsin, papain and trypsin respectively. Pepsin hydrolysates showed higher metal chelating activity and radical scavenging activity than trypsin and papain hydrolysates. Trypsin hydrolysates showed the lowest antioxidant activities, which may be due to the low degree of hydrolysis. In general, for antioxidant activity, there was an increase in activity with an increase in the degree of hydrolysis. Similar antioxidant activity was found in both the okra protein isolate and concentrate hydrolysates except for metal chelating activity which was higher in okra protein isolate hydrolysates. This may be due to the higher ash concentration in the concentrates (9.4% in concentrates vs. 2.6% in isolates). In this study, pepsin hydrolysates with a final DH of 35.2% showed higher reducing power and metal chelating activity than trypsin and papain hydrolysates. Okra protein hydrolysates were found to have varying levels of antioxidant activity, which was dependent on the specificity of the protease and proportional to the degree of hydrolysis achieved.
