Chitosan is derived from exoskeleton of crustaceans (such as crabs and shrimp) and cell walls of fungi has a number of commercial and possible biomedical uses is produced commercially by deacetylation of chitin is a linear polysaccharide composed of randomly distributed β-(1-4)-linked D-glucosamine (deacetylated unit) and N-acetyl-Dglucosamine (acetylated unit). The structural element This study was conducted to compare the antibacterial activity of chitosan with the combination of chitosan and vancomycin against gram negative Escherichia coli and gram positive Staphylococcus aureus. Optical density (OD) value measurement technique was undertaken to measure antibacterial activity. After incubation, turbidimetric measurements of bacterial growth of sets of test tubes were taken after every 4 hours, for 48 hours and then compared. For S. aureus and chitosan the average absorbance were found as 0.448, 0.457, 0.492, 0.532, 0.582, 0.645, 0.683, 0.724, 0.751, 0.793, 0.840, and 0.896, while for S. aureus with both chitosan and vancomycin, absorbance were 0.267, 0.286, 0.321, 0.346, 0.386, 0.431, 0.467, 0.475, 0.509, 0.541, 0.565, and 0.629. Again for E. coli and chitosan the average absorbance were found as 0. 407, 0.429, 0.464, 0.506, 0.564, 0.6, 0.645, 0.703, 0.756, 0.815, 0.850, and 0.901, while E. coli with both chitosan and vancomycin, absorbance were 0. 213, 0.233, 0.322, 0.347, 0.409, 0.446, 0.475, 0.511, 0.545, 0.582, 0.628, and 0.647. Both of these revealed that chitosan and vancomycin together possess higher antibacterial activity against gram positive and gram-negative bacteria than chitosan solitarily used. Statistical analysis of the both study also represented in Mean±3SD. Comparison of the antibacterial activity against E. coli and S. aureus revealed that chitosan and vancomycin posses similar antibacterial activity against gram positive and gram negative bacteria.
In the present study we formulated a low cost complementary baby food and investigated its role to improve the nutritional status of the malnourished baby. One hundred gm of complementary baby food was prepared by blending of 40 gm cereal powder, 16 gm green gram powder, 14 gm sesame powder, 14 gm banana powder, 10 gm pumpkin powder and 6 gm sugar powder according to the proportion of balanced diet. The formulated complementary baby food contained 336.
The modern trend of consuming mustard oil in raw, fried and cooked forms is increasing day by day in the general people irrespective of economic status in Bangladesh. But unfortunately they are not aware of the adverse effects of this oil. Because, mustard oils have been evidenced to have high level of erucic acid and erucic acid has been evidenced to be a causative agent for cardiovascular diseases. It is therefore very important to know the erucic acid level both in traditional and commercially available mustard oils in Bangladesh. The aim of the study was to investigate the fatty acid profile of the commercial mustard oil (Industrially manufactured) and ghani (traditional method of oil processing) mustard oil. After preparation of the purified fatty acid methyl esters of the above oils, Gas-Liquid Chromatographic (GLC) analysis was carried out. Results showed that the percentage of erucic acid (22:1) in the commercial and ghani mustard oils were 41.80% and 51.98% respectively. In context to percentage of erucic acid, the commercial mustard oil seemed better compared to ghani. The reasons behind this discrepancy still remains unclear but the possibility of mixed oil effects in the commercial mustard oil could be investigated in the near future. The author also established a method to partially eliminate erucic acid from mustard oil. After partially eliminate erucic acid from commercial mustard oil erucic acid reduces from 41.80% to 20.14%.
Malnutrition is the main nutritional problem in the developing countries like Bangladesh. The most vulnerable groups are under-5 children, adolescent girls, pregnant and lactating mothers. This study investigated the nutritional status of children aged 2-5 years of urban and rural areas of three different districts (Kushtia, Jhenidah and Jessore) of Bangladesh. The study was conducted on 200 children among those 100 were from Kushtia, 50 from Jhenidah and 50 from Jessore district. Among the children of Kushtia 55 were male & 45 were female. Among the children of Jhenidah 27 were male & 33 were female. Among the children of Jessore 32 were male & 28 were female. Analyzing anthropometric data we found that the mean height, weight and MUAC of males were 90.47 cm, 13.31 kg and 14.88 cm respectively while 88.51 cm, 12.58 kg and 14.70 cm respectively in case of female. Among the children 57% were under weight, 60% were stunted and 24.5% were found wasted. According to MUAC 35% children were normal and 12.5% children were severely malnourished in those three districts of Bangladesh.
A simple, precise and sensitive reversed-phase HPLC method using Photo-diode array detector for simultaneous determination of dextromethorphan (DXM) and chlorpheniramine (CLP) in various matrices had been developed and validated. The separation was achieved within 8 minutes on a C-18 column (15 cm x 4.6 mm x 5 μm) using methanol/ pH 3.0 potassium dihydrogen phosphate buffer (60:40, v/v) mobile phase in an isocratic elution mode with flow rate 0.8 mL/min and UV-detection at 230 nm. External standard was employed for quantification. The current method demonstrated good linearity ranged 1-200 µg/mL for CLP (retention time 3.83 ± 0.10 min) with r2 of 0.9994 and 2-1000 µg/mL for DXM (retention time 5.02 ± 0.10 min) with R2 of 0.9993. The limits of detection and quantification were 0.25 µg/mL and 1.0 µg/mL for CLP and 0.50 µg/mL and 1.5 µg/mL for DXM. No interference from matrices was observed and samples remained stable in the HPLC injector for 12 h. The developed method was accurate that employed a simple liquid/liquid extraction procedure with recovery ranged 90.0%-101.9% for both analytes. Intra and inter-day precision were less than 2.5%. The method was proved robust and reproducible that is applicable to pharmaceutical (active raw materials, syrups) and biological (blood) matrices.
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