Posted by admin on Oct 31, 2020 in |
Starch is a natural polymer and is a group of polysaccharides composed of glucopyranose units joined together by glycosidic linkages. Starch is an important polysaccharide extensively used in many industries like food, cosmetics, paper, textile, pharmaceutical, etc. It is found to be present in appreciable quantity in stem, roots, leaves, seeds, fruits, and tubers. Hence this study was conducted to isolate and characterize starch from the tuber of Antigonon leptopus species. In this work, starch from Antigonon leptopus tubers was extracted, and % starch yield was calculated as well as evaluated for its macroscopic characters, Preliminary phytochemical screening of aqueous extract for the presence of carbohydrate, tannins, saponins, and flavonoids. The result showed that there was a sufficient amount of starch yield. The compound microscope showed the presence of round and oval-shaped small and large starch particles, single as well as in groups. The diamond and prism-shaped calcium oxalate crystals were also seen. Thus, starch of tuber Antigonon leptopus species shows good properties and could serve as alternatives for...
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Posted by admin on Sep 30, 2020 in |
Bay leaf is an aromatic leaf commonly used in cooking for its distinctive flavor and fragrance. The bay leaf sold in Nigerian markets being Laurus nobilis (L. nobilis) is imported. The leaf of Syzygium guineense (S. guineense) and Syzygium eucalyptoides (S. eucalyptoides) have a long history of use as vegetables and spices in Nigeria. In this study, leaf of S. guineense, S. eucalyptoides, and a commercial sample of L. nobilis being the gold standard for bay leaf, were evaluated for comparative essential oil composition in search of Nigerian bay leaf. The essential oil was obtained by hydrodistillation using a Clevenger-type apparatus. The essential oils were analyzed by gas chromatography-mass spectrometry (GC-MS). The major chemical constituents of the essential oil of L. nobilis were eucalyptol (9.33%), α- pinene (8.31%), and camphene (3.17%). S. guineensec contained β-myrcene (12.29%), globulol (7.60%), phytol (6.63%) and trans-ocimene (6.08%). S. eucalyptoides leaf essential oil contained 6-octadecanoic acid (16.37%), phytol (8.46%), 6-octadenanoic acid (9%), pentadenanoic acid (7.26%), caryophyllenyl alcohol (6.17%). L. nobilis leaf essential oil contained 75...
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Posted by admin on Aug 31, 2020 in |
The purpose of the present research work was to formulate and evaluate vanishing herbal cream. Herbal creams offer several advantages over other creams. The majority of existing creams which has prepared from drugs of synthetic origin and give extras fairness to face, but it has several side effects such as itching or several allergic reactions. Herbal creams do not have any of these side effects; without side effects, it gives the fairness look to the skin. The method carried out to prepare herbal cream was very simple. Firstly, the oil phase was prepared, the mixture of stearic acid (17%), potassium hydroxide (0.5%), sodium carbonate (0.5%) were melted at 70 ºC. Secondly, the aqueous phase was prepared, a mixture of alcoholic extract of crude drugs, including C. officinalis and A. indica, Turmeric, Nutmeg, Cinnamon, are commercially available as extracts and in the different formulation to be used either for cosmetic purposes or for medical use. Glycerin (6%), perfume (0.5%), water (71%) heated at 70 ºC. Then aqueous phase was added...
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Posted by admin on Aug 31, 2020 in |
A field study was conducted at the Vegetable Research Farm, Banaras Hindu University, Varanasi, during rabi season 2016-2017 for the evaluation of newer insecticides (Imidacloprid 600 FS and Thiamethoxam 30 % FS) on plant growth characters of a garden pea. The two insecticides were applied as a seed treatment in different doses. The result of bio-efficiency revealed that the seed treatment with T₃ gaucho (Imidacloprid 600 FS) @ 2 ml/kg was found effective in promoting plant growth and increased germination % (93.84%) and maximum plant stand per meter square(m²) (30.40%). Less number of days to 50% flowering (43.33 days) and maximum plant height at last harvesting stage (91.07 cm) were also recorded in seed treatment with T₃ gaucho (Imidacloprid 600 FS), while there was no significant difference in plant height at 30 DAS and 45 DAS. However, all the seed treatment was found superior over untreated...
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Posted by admin on Aug 31, 2020 in |
The present study, carried out on Cymbopogon citratus was interested in volatile and no-volatile extracts of the plant. It focused on the effect of two types of extracts on eleven strains of bacteria. Chemical analysis of the volatile extract obtained with a yield of 2.28% revealed the presence of 72.91% of citral and other minority compounds. The extraction yield of the ethanolic extract (no-volatile) is 10.8%. Chemical groups such as reducing compounds, alkaloids, flavonoids, phenolic compounds, leuco-anthocyanins, saponosides, coumarins, and finally, terpenoids have been identified in this extract. The Minimum Inhibitory Concentration (MIC) and Bactericidal (CMB) were determined by macro dilution method. The volatile extract showed the best inhibitory activities on more than 90% of the strains of bacteria studied. The lowest minimum inhibitory concentrations were obtained against Micrococcus luteus (0.3125 mg/ml), Staphylococcus epidermidis T22695 (0.625 mg/ml) and Proteus vulgaris A25015 (0.625 mg/ml). This extract also had the best inhibition diameters against most bacteria. The bactericidal activity of this extract was only obtained against Enterococcus faecalis (1.25 mg/ml). The...
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