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Production of fermented tea petal decoction with insights into in vitrobiochemical tests,antioxidant assay and GC-Ms analysis

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Food Production, Processing and Nutrition 2021年第1期3卷 406-415页

作者： soumya Majumder sumedha saha Arindam Ghosh sukanya Acharyya sahadeb sarkar sourav Chakraborty Malay Bhattacharya Molecular Biology and Tissue Culture Laboratory Department of Tea ScienceUniversity of North BengalSiliguriDarjeelingWest Bengal Pin-734013India

This research work was designed to attempt and propose the first report on production and biochemical characterization of fermented tea flower petal decoction or simply tea petal *** tea petal decoction and brewer’s yeast or saccharomyces cerevisiae were co-cultured for *** activity and chromatographic separation of potential candidates were *** investigations for qualitative characters on this fermented broth revealed the presence of steroids,tannin,flavonoids,phenol,cardiac glycosides,coumarin,caffeine *** manufactured fermented broth showed high free radical scavenging activity after 2 months of *** DPPH scavenging activities were also observed in solvent fractions of acetone,ethanol and *** antioxidant activity,alcohol percentage and other qualities were seen to be gradually increased during *** chromatography-mass spectrometry analysis revealed the presence of 44 compounds including many potential antioxidant molecules and other bioactive ***,presence of alcohol with medicinally active compounds and antioxidant activity will make it as acceptable as a good wine and tea flower as economically functional.

关键词： Tea petal Antioxidant GC-Ms Fermentation brewer’s yeast

Acute Toxicity and Antipyretic Activities of a Methanolic Extract of Alchornea cordifolia Leaves

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Pharmacology & Pharmacy 2013年第7期4卷 1-6页

作者： K. E. Effo G. Kouakou-siransy G. Irie-Nguessan R. W. sawadogo I. L. Dally A. B. Kamenan L. s. Kouakou J. Kablan-Brou Laboratoire de Pharmacologie et de Physiologie UFR des Sciences Pharmaceutiques et BiologiquesUniversiteFelix Houphouet BoignyAbidjanCote d’Ivoire Laboratoire de Pharmacologie et de Toxicologie Institut de Recherche en Sciences de la Sante(IRSS/CNRST)OuagadougouBurkina Faso Laboratoire de Galenique UFR des Sciences Pharmaceutiques et BiologiquesUniversiteFelix Houphouet BoignyAbidjanCote d’Ivoire.

Alchornea cordifolia (Euphorbiaceae) is a very prized plant among traditional healers in Africa. Its leaves are used for its antipyretic properties in traditional areas. The aim of our study is to determine the acute toxicity and the antipyretic activity of a methanolic extract of Alchornea cordifolia leaves. Acute toxicity was assessed by measuring mortality, changes in body weight, spontaneous movements, and normal rectal temperature in mice. Antipyretic activity was evaluated by brewer’s yeast-induced hyperpyrexia in rats according to Teotino method (1963). The antipyretic effect of methanolicextract of Alchornea cordifolia leaves was compared with paracetamol (100 mg/kg bw) orally. Groups of mice treated with doses of 6500;3250;1625 and 812.5mg/kg of the extract did not show any mortality, nor significant alteration of body weight, nor alteration of spontaneous movements. However, incomplete reversed dose-dependent hypothermic activity was observed with doses of 50.78;101.56;203.12;406.25;and 812.5 mg/kg p.o. of the extract, showing acute toxicity of this plant. In the antipyretic assay, the extract with doses of 50.78;101.56;203.12;406.25;and 812.5 mg/kg p.o. exhibited a significant dose-dependent antipyretic activity similar to paracetamol (100 mg/kg bw) in rats. Thus Alchornea cordifolia may inhibit prostaglandins-biosynthesis from hypothalamus. Our results support claims on its traditional uses in management of fever. However Alchornea cordifolia may affect hypothalamus not only during fever but also when body temperature is normal.

关键词： Alchornea cordifolia Acute Toxicity brewer’s yeast Hypothermia

stresses Imposed on yeast During Brewing Fermentations and Their Effect on Cellular Activity

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中外酒业 2021年第5期 48-57页

作者： Graham G.stewart International Centre for Brewing and Distilling Heriot-Watt UniversityRiccartonEdinburghEH144ASScotland(Retired)

brewer’s yeast strains are exposed to a spectrum of threats and“in-sults”thatcultures encounter during wort *** storage(including acid washing)andtheir propagation can also stress yeast *** are a plethora of parameters that ayeast culture toler-ates during its propagation,stprage,and throughout and between *** can result in a number of effects on a yeast *** includedecreases in yeast viability and vitality,depletion of intracellular glycogen,increases intrehalose,and excretion of intra-cellular proteinase A and other proteinases,with effects onbeer foam *** of cell wall components will also *** addition,modification ofa culture’s flocculation characteristics can result,to-gether with the formation of unfilterablemannan-protein beer hazes,Finally,increases in respiratory deficient(petite)and other yeastmu-tants have been reported.

关键词： acid washing brewer’s yeast centrifuges glycogen propa-gation storage stress trehalose

Effect of Fish Meal Replacement by Unconventional Meal in the Post-Larval Diet of Clarias Gariepinus in Benin (West Africa)

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Agricultural sciences 2022年第10期13卷 1091-1102页

作者： Edmond sossoukpe Isidore N. Odjo Théophile Godome Emile D. Fiogbe Laboratory of Wetland Research Department of Zoology Faculty of Sciences and Techniques University of Abomey-Calavi Abomey-Calavi Benin

To reduce the pressure on aquatic resources due to the use of fishmeal in fish feed, the mastery and use of alternative sources of fishmeal in all stages of fish development are essential. Five diets including 4 experimental and one control diet were considered. Experimental diets of post-larvae were developed from unconventional ingredients in which fishmeal was completely replaced by a mixture of brewer’s yeast, chicken viscera and maggots. These foods were tested on Clarias gariepinus post-larvae with an initial average weight of 80 ± 1 mg. 1500 fish individuals were equally distributed in 15 concrete basins with a volume of 500 L forming five treatments in triplicate. Fish individuals were fed, manually at a ration rate of 20%, four times per day. The specific growth rates were 8.38%/day in imported food and 6.35%/day in the experimental food receiving 45.5% of protein from unconventional meal. similar results were obtained with the feed consumption index. These encouraging results show that it is possible to partially or completely replace fishmeal in catfish feed and obtain an economically profitable production. The recovery of waste such as chicken viscera, brewer’s yeast and soybean meal in fish food formulation as tested in this study is a good contribution to environmental sanitation.

关键词： Maggot Meal brewer’s yeast Diet Post-Larvae Fish Meal Replacement Benin