Posted by admin on Jul 31, 2019 in |
In the present study the 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-chromen-4-one isolated from the methanolic extract of leaves of Andrographis echioides was studied for alpha-amylase and alpha-glucosidase inhibition using an in-vitro model. The isolation was done using column chromatography using gradient elution with different mobile phase. Structural elucidation was carried out on the basis of spectral analysis. The study revealed that the 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-chromen-4-one exhibited significant α-amylase and α-glucosidase inhibitory activities with an IC50 value of 36.2 ± 0.42 and 41.4 ± 0.34% respectively and well compared with standard acarbose drug. The infra-red spectrum specific absorption bands for 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-chromen-4-one viz. 3401.71 (O-H stretching vibration of phenol), 1666.95 (C=O Aryl ketonic stretch), 1612.42 (C-C Aromatic ring stretch), 1519.96 (C=O aromatic stretch), 1463.09 (C=C aromatic stretch), 1380.89 (O-H bending of phenols), 1318.98 (C-H bond in Aromatic hydrocarbon), 1246.04 (C-O stretch of Aryl ether), 1213.26 (C-O stretch of phenol), 1169.06 (C-CO-C stretch and bending in ketone), 932.62, 807.89, 702.92, 638.65 (C-H bending of aromatic hydrocarbons). Structural elucidation of 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-chromen-4-one was done by spectrum analysis such as 13C and...
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Posted by admin on Jul 31, 2019 in |
Introduction: Thymus vulgaris (za’atar) is one of the most famous and traditional spices of Arab countries. Extracts of Thymus vulgaris (zatar) found to be useful as traditional medicine. The current studies are aiming to further explore the phytoconstituents of Thymus vulgaris and its biological activity. Methodology: The present study investigated the phytochemical constituent of za’atar and fractionated with organic solvents using the classical method. Biological activity was done as an immunomodulatory activity, anti-bacterial, cytotoxic and anti-cancer activity in-vitro. Results: Hundred gram of ethanolic crude extract was prepared from za’atar leaves using classical method and fractionated with organic solvents (n-hexane, chloroform, ethyl acetate, and n-butanol) yielding 20 g, 16 g, 8 g and 18 g of each fraction respectively, phytochemical studies showed positive results for alkaloids, carbohydrates/glycosides, tannins, flavonoids, and triterpenes/sterols. All fractions except butanol showed potential immunomodulatory activity. Mild, significant antibacterial activity was found in chloroform fraction. Whereas, ethyl acetate and n-butanol samples exhibited significant activity against E. coli. Our results demonstrated that ethanolic extract of za’atar possesses significant...
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Posted by admin on Jul 31, 2019 in |
Platelet or thrombosis is one of the most important factors in blood clots formation. However, activation of platelet aggregation plays a significant role in homeostasis process, but in excess, it causes different cardiovascular diseases such as myocardial infarction, atherothrombosis disease, and coronary artery disease. To reduce the occurrence of these diseases, anti-platelet agents can be used to prevent blood clots formation. Therefore, this study was conducted to test the antiplatelet activity of crude Fucoidan from the brown seaweed (Sargassum polycystum) on mice. The measurement parameters used included bleeding time, coagulation time and decrease in plasma uptake by the addition of ADP as a platelet aggregation agent. The mice used were divided into 5 groups: normal control group (0.1% Na-CMC suspension), positive control group (clopidogrel 75 mg/kg), and the crude Fucoidan doses of 50 mg, 100 mg, and 200 mg. The results showed that positive control and crude Fucoidan with doses of 50 mg, 100 mg, and 200 mg groups could prolong coagulation time and bleeding time and also increase...
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Posted by admin on Jul 31, 2019 in |
Objective: To evaluate the antimicrobial potential of Nocardiopsis flavescens isolated from the marine environment. Methods: Attempts were made to isolate actinomycete strains from marine coastal regions of Andhra Pradesh, India. The soil samples collected were pre-treated with calcium carbonate, diluted and plated on three different media to isolate actinomycetes. All the isolates were screened for antimicrobial activity by using the Kirby-Bauer disc diffusion method. Among the fifty isolates screened, one potent strain designated as VJMS-18 exhibited high antimicrobial activity. The isolate was identified by using micro-morphological, cultural, biochemical, physiological and molecular approaches. Results: The Potent strain was identified as Nocardiopsis flavescens VJMS-18. It showed good growth on YMD agar amended with 3% NaCl. Growth pattern of the isolate was studied by culturing it in YMD broth. The culture broth was extracted with ethyl acetate and tested for antimicrobial activity. It exhibited high antimicrobial activity against gram positive and gram negative bacteria as well as fungi. Conclusion: The present investigation reveals that Nocardiopsis flavescens VJMS-18 isolated from the coastal environment...
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Posted by admin on Jul 31, 2019 in |
The aim of current study was to compare the total phenolic content (TPC), total flavonoid content (TFC) and antioxidant activity of roots of seven Asparagus species from North-West India. Total phenolic content measured by Folin-Ciocalteu method ranged from 3.85 ± 0.25 (A. racemosus) to 7.74 ± 0.03 (A. falcatus), 3.42 ± 0.14 (A. racemosus) to 7.22 ± 0.12 (A. falcatus) and 1.12 ± 0.13 (A. officinalis) to 3.93 ± 0.54 mg/g of dry weight of root powder (A. retrofractus) in methanolic, ethanolic and aqueous extracts, respectively, expressed as gallic acid equivalents. The total flavonoid content determined by Aluminium chloride method ranged from 0.61 ± 0.03 (A. officinalis) to 1.86 ± 0.0303 (A. densiflorus), 0.39 ± 0.01 (A. adscendens) to 1.63 ± 0.0403 (A. densiflorus) and 0.31 ± 0.00 (A. adscendens) to 1.51 ± 0.02mg/gDW (A. densiflorus) in methanolic, ethanolic and aqueous extracts, respectively expressed as rutin equivalents. The results showed that TPC and TFC values were highest in methanolic extracts followed by ethanolic and lowest in aqueous extracts. The...
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