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Moonjit Das Ashaparna Mondal Kaustuvmani Patowary Himaja Malipeddi 《IET nanobiotechnology / IET》2017,11(3):225
Silver nanoparticles (AgNPs) were synthesised from aqueous Ag nitrate through a simple, competent and eco‐friendly method using the leaf extract of Ipomoea eriocarpa as reducing as well as capping agent. Ultraviolet–visible absorption spectroscopy was used to confirm the formation of AgNPs which displayed the substantiation of surface plasmon bands at 425 nm. The NPs were also characterised using Fourier transformer infrared spectroscopy, X‐ray diffraction method, transmission electron microscope and zeta potential. The characterisation study confirmed the formation of AgNPs, their spherical shape and average diameter of 12.85 ± 8.65 nm. Zeta potential value of −20.5 mV suggested that the AgNPs are stable in the suspension. The aqueous extract and the AgNPs were further screened for in vivo anti‐inflammatory activity using carrageenan‐induced paw edema in male Wistar rats. The study demonstrated that the AgNPs (1 ml kg−1) had a significant (p < 0.05) anti‐edemic effect and inhibition was observed from the first hour (21.31 ± 1.34) until the sixth hour (52.67 ± 1.41), when the inhibitory effect was greatest and superior to the aqueous extract and the standard, diclofenac.Inspec keywords: silver, nanoparticles, nanofabrication, ultraviolet spectra, visible spectra, absorption coefficients, surface plasmons, Fourier transform infrared spectra, X‐ray diffraction, transmission electron microscopy, suspensions, drugs, nanomedicineOther keywords: biosynthesis, aqueous leaf extract, ipomoea eriocarpa, antiinflammatory effect, carrageenan‐induced paw edema, male Wistar rats, silver nanoparticles, aqueous nitrate, capping agent, ultraviolet‐visible absorption spectroscopy, surface plasmon band, Fourier transformer infrared spectroscopy, X‐ray diffraction, transmission electron microscopy, zeta potential, spherical shape, suspension, aqueous extract, in vivo antiinflammatory activity, antiedemic effect, inhibitory effect, diclofenac, wavelength 425 nm, size 12.85 nm to 8.65 nm, Ag 相似文献
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Analysis of Fatty Acid and Lignan Composition of Indian Germplasm of Sesame to Evaluate Their Nutritional Merits
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Rupam Kumar Bhunia Anirban Chakraborty Ranjeet Kaur T. Gayatri K. V. Bhat Asitava Basu Mrinal K. Maiti Soumitra Kumar Sen 《Journal of the American Oil Chemists' Society》2015,92(1):65-76
An attempt was made to individually analyze a germplasm collection of 54 indigenous Indian sesame cultivars for fatty acid and lignan composition of their seed oil by gas chromatography and high performance liquid chromatography, respectively. The entries varied in their fatty acid and lignan composition. The mean percentage contents of palmitic, stearic, oleic, linoleic and α‐linolenic acids ranged between 10–22, 5–10, 38–50, 18–43 and less than 1 whereas sesamol, sesamin and sesamolin scored between 3–37, 27–67, 20–59 of the total percentage of lignan, respectively. The highest percentage of α‐linolenic acid (ALA) was obtained in Var‐9 (1.3 % of the total fatty acids). Among the lignans, high sesamin content is considered to be significant, particularly in terms of long shelf life and nutraceutical value of sesame seed oil. The study has broadened our understanding related to differential biochemical composition of the rich sesame germplasms, thereby providing us with a useful groundwork for identifying potential targets and suitable cultivars for genetic engineering approaches to be undertaken in order to improve the nutritional quality of sesame oil, which in turn would be beneficial towards human health. 相似文献
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Moonjit Das Kaustuvmani Patowary Radhakrishnan Vidya Himaja Malipeddi 《IET nanobiotechnology / IET》2016,10(6):411
In the present study, an efficient biosurfactant producing bacterial strain Pseudomonas aeruginosa MKVIT3 was isolated from an oil logging area in Vellore district of Tamil Nadu, India. Liquid chromatography–mass spectrometry (LC‐MS/MS) analysis was performed for the identification of different congeners present in the extracted biosurfactant. The column purified biosurfactant was used to stabilise the formation of silver nanoparticles (NP) using borohydrate reduction in reverse micelles. The silver NP were characterised using UV‐vis absorption spectroscopy, Powder‐XRD TEM analysis and zeta potential. A comparative study of the antimicrobial activity and cytotoxic efficacy was done for the extracted purified biosurfactant and the silver NP. The LC‐MS/MS analysis of the biosurfactant revealed the presence of five rhamnolipid congeners. The synthesised silver NP showed the characteristic absorption peak in UV‐vis at 440 nm. Powder‐XRD and TEM analysis revealed the average particle size of the NP as 17.89 ± 8.74 nm as well as their cubic structure. Zeta potential value of −30.9 mV suggested that the silver NPs are stable in the suspension. Comparative study of the antimicrobial activity revealed that the silver NP are more potent than the biosurfactant in inhibiting the growth of microbes. Cytotoxic activity revealed that the biosurfactant are more effective than the synthesised silver NP.Inspec keywords: microemulsions, silver, nanoparticles, nanomedicine, cellular biophysics, surfactants, microorganisms, chromatography, mass spectroscopic chemical analysis, ultraviolet spectra, visible spectra, antibacterial activityOther keywords: Ag, microemulsion synthesis, silver nanoparticles, Pseudomonas aeruginosa, MKVIT3 strain, antimicrobial activities, cytotoxic activities, biosurfactant producing bacterial strain, oil logging area, Vellore district, Tamil Nadu, India, liquid chromatography–mass spectrometry, LC‐MS/MS analysis, extracted biosurfactant, column purified biosurfactant, borohydrate reduction, reverse micelles, UV‐vis absorption spectroscopy, powder‐XRD TEM analysis, zeta potential, antimicrobial activity, cytotoxic efficacy, extracted purified biosurfactant, rhamnolipid congeners 相似文献
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Nilotpal Barooah Anirban Karmakar Rupam J. Sarma Jubaraj B. Baruah 《Inorganic chemistry communications》2006,9(12):1251-1254
The complex [Ni(L1)2(py)2]. toluene (L1 is N-phthaloylglycinato and py is pyridine) was prepared from solid state reaction whereas co-crystals having composition 2[Ni(L1)2(py)3(H2O)] · [Ni(L1)2(py)2(H2O)2] · 2py · 2H2O was obtained from solution state reaction. 相似文献
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Dipjyoti Kalita Rupam Sarma Jubaraj B. Baruah 《Inorganic chemistry communications》2009,12(6):569-571
The role of different oxidation states of manganese in manganese(II) acetate promoted methanolysis reaction of p-nitrobenzoic acid quinolin-8-yl ester is presented. 相似文献
6.
Kaustuvmani Patowary Moonjit Das Rupshikha Patowary Mohan Chandra Kalita Suresh Deka 《Journal of surfactants and detergents》2019,22(2):373-384
Production of a rhamnolipid biosurfactant (RBS) using discarded mixed bakery waste (BW) employing bacterial strain Pseudomonas aeruginosa strain PG1 (identified by 16 s rDNA sequencing) was investigated for bioconversion of the food waste. Dry and powder form BW was supplemented with mineral salt media (MSM) as a sole carbon source for production of RBS. RBS production was measured based on the drop collapse assay and surface tension (ST) reduction of the culture media. Production of RBS in the culture media was enhanced by optimizing the carbon source (BW) concentration and the proper nitrogen source along with the pH of the MSM. Under optimized culture conditions, 11.56 g L−1 day−1 crude biosurfactant (BS) was achieved. The RBS had the ability to reduce the ST of the optimized MSM from 72.0 to 25.8 mN m−1 during culture, where the critical micelle concentration (CMC) of the biosurfactant was found to be 100 mg L−1. Liquid Chromatography Mass Spectroscopy (LC-MS), Fourier Transform Infrared spectroscopy (FTIR), and scanning electron microscopy (SEM)–energy dispersive X-ray spectroscopy (EDS) analyses of the purified BS confirmed that it is of rhamnolipid in nature and it is made up of both monorhamnolipid and dirhamnolipid congeners. Furthermore, the RBS did not express any cytotoxic effect on the cell line of mouse L292 fibroblastic cell indicating the biosafety nature of the high-value biomolecule. 相似文献
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Maurya Atul Kumar Gogoi Rupam Sethi Sushanta K. Manik Gaurav 《Journal of Materials Science》2021,56(30):16976-16998
Journal of Materials Science - Fly ash (FA) particles were surface modified with cetyltrimethylammonium bromide (Ctab) and hybridized with graphene oxide (GO) and carboxymethyl cellulose (CMC)... 相似文献
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Abstract
Two lanthanide-based three dimensional metal–organic frameworks (MOF) viz. [Nd(HCOO)3]n (1) and [Pr(HCOO)3]n (2) have been synthesized and characterized. Both the compounds have similar structure. In this study we have demonstrated that the compounds are highly efficient in catalyzing epoxidation of various cyclic and linear olefinic substrates. MOF compounds are stable and recyclable under the reaction conditions. Notably, MOF systems are remarkably more active and selective than the corresponding lanthanide oxide in epoxidation reaction of olefins. 相似文献10.
Silicon - This paper presents a method-based investigation on the application of low dimensional materials like graphene, carbon nanotube (CNT), transition metal dichalcogenides (TMDCs) in tunnel... 相似文献