排序方式: 共有81条查询结果,搜索用时 31 毫秒
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A. Sen Y. Nazeer Ahammed B. C. Arya Tirthankar Banerjee G. Reshma Begam B. P. Baruah A. Chatterjee Anil K. Choudhuri Amit Dhir Trupti Das Pitamber Prasad Dhyani N. C. Deb Ranu Gadi Mangesh Gauns Sanjay Kumar Ghosh Abhishek Gupta K. C. Sharma A. H. Khan K. Maharaj Kumari Manish Kumar Arun Kumar Jagdish Chandra Kuniyal Anita Lakhani R. K. Meena P. S. Mahapatra S. W. A. Naqvi Dharam Pal Singh S. Pal Sipra Panda Rohtash J. Saikia P. Saikia A. Sharma Priyanka Sharma M. Saxena D. M. Shenoy C. Viswanatha Vachaspati S. K. Sharma T. K. Mandal 《Mapan》2014,29(4):273-284
In this paper, we present mass concentrations of particulate matter [PM2.5, PM10 size fractions and total suspended particulates (TSP)] measured simultaneously over land stations (Kullu, Patiala, Delhi, Ajmer, Agra, Lucknow, Varanasi, Giridih, Kolkata, Darjeeling, Jorhat, Itanagar, Imphal, Bhubaneswar, and Kadapa), mostly distributed across the Indo-Gangetic plain (IGP) of India as well as in the marine atmosphere over Bay of Bengal (BoB) in the period from 20 January to 3 February, 2014. The main objective of this study was to quantify the continental outflow of particulates (PM2.5, PM10 and TSP) from IGP and associated regions into the BoB along with low level north-east wind flow during winter monsoon period. The present study provides a glimpse of the aerosol loading over the IGP region. During this campaign, the highest average PM2.5 (187.8 ± 36.5 µg m?3, range 125.6–256.2 µg m?3), PM10 (272.6 ± 102.9 µg m?3, range 147.6–520.1 µg m?3) and TSP (325.0 ± 71.5 µg m?3, range 220.4–536.6 µg m?3) mass concentrations were recorded at Varanasi, Kolkata and Lucknow over middle and lower IGP regions. The PM2.5 (average 41.3 ± 11.9 µg m?3; range 15.0–54.4 µg m?3), PM10 (average 53.9 ± 18.9 µg m?3; range 30.1–82.1 µg m?3) and TSP (average 78.8 ± 29.7 µg m?3; range 49.1–184.5 µg m?3) loading over BoB were found to be comparable to land stations and suggests possible continental outflow. Over the continental region, the highest PM2.5/PM10 ratio was recorded at Delhi (0.87). The PM2.5/PM10 ratio over BoB (0.77) was found to be quite high and comparable to Varanasi (0.80) and Agra (0.79). 相似文献
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Tejinder Kaur Marwaha Ashwini Madgulkar Mangesh Bhalekar Kalyani Asgaonkar 《应用聚合物科学杂志》2020,137(47):49551
Chitosan is a hydrophilic polymer with prominent mucoadhesive properties. However, it forms weak hydrogen bonds with mucin thus limiting its mucoadhesion and exhibit reduced bioavailability due to its short retention time in the body. The aim of the present study was to synthesize and characterize novel thiolated chitosan with improved functional property. A unique approach of using molecular docking to select ligand to chemically modify chitosan has been employed in the present research. A set of ligands were screened virtually using docking analysis and 2-mercapto benzoic acid showed the lowest glide score of −4.31 Kcal/Mol thus displayed better binding interaction with chitosan. Based on the docking results, the best-fit ligand was selected for wet lab synthesis. 2-Mercapto benzoic acid was covalently attached to chitosan via formation of an amide bond and the reaction was mediated by carbodiimide and N-hydroxysuccinimide. The synthesized polymer was in turn evaluated for zeta potential, Fourier transformed infrared, differential scanning calorimetry, molecular weight that confirmed conjugation of chitosan with the thiol ligand. The prepared thiomer was further subjected to mucoadhesion studies and displayed better mucoadhesion properties as compared to unmodified chitosan. Thus, the potential of the novel thiomer can be further explored as an excipient for drug delivery system with an emphasis on mucoadhesion. 相似文献
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Murlidhar Bhatawdekar Ramesh Ahmed Munir Mavaluru Dinesh Siddiqi Ahmed Faisal Mohamad Edy Tonnizam 《Engineering with Computers》2019,35(4):1419-1430
Engineering with Computers - Rock shear strength parameters (interlocking and internal friction angel) are considered as significant factors in the designing stage of various geotechnical... 相似文献
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As mosquito-borne diseases are increasing continuously throughout the world, mosquito repellent textiles are in demand as a preventive measure for mosquito bites to avoid diseases. In this study, mosquito repellent chemical was prepared by modification of N, N-Diethyl-3-methylbenzamide (DEET) and applied on to cotton textiles. As DEET is a well-known mosquito repellent, it is a main ingredient in this modified DEET (MD). Mosquito repellent textiles were prepared by padding cotton fabrics with MD using a conventional pad-dry-cure method. Mosquito repellent activity was evaluated by cage test method wherein a human arm covered with the treated textiles to Aedes aegypti mosquitoes was exposed. Fabrics treated with MD presented a higher and longer lasting protection from mosquitoes assuring over 90% mosquito repellency for unwashed treated fabrics and between70 and 80% for 10 times washed treated fabrics. 相似文献
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The effect of electron beam irradiation on microbiological quality and safety of fresh-cut tomatoes was studied. Fresh tomatoes were obtained from a local supplier and then cut into cubes that were separated from the stem scars. Both cubes and stem scars were inoculated with a rifampin-resistant strain of either Salmonella Montevideo or Salmonella Agona, separated into treatment groups, and treated by electron beam irradiation at 0.0 (control), 0.7, or 0.95 kGy. The effect of electron beam irradiation on Salmonella, lactic acid bacteria, yeast, and mold counts and pH of tomato cubes and stem scars was determined over a 15-day storage period at 4 degrees C. Results indicated that although irradiation treatment significantly reduced most microbial populations on tomato samples, there were no differences in the reduction of microbial populations between treatments of 0.7 and 0.95 kGy. Irradiation at either dose resulted in a significant reduction in Salmonella when compared with the control (P < 0.05). Lactic acid bacteria, yeasts, and molds were more resistant to irradiation than were Salmonella. No differences were detected between the two Salmonella serotypes in response to irradiation treatment. These results indicate that irradiation at doses of at least 0.7 kGy can be used for pathogen reduction in fresh-cut tomatoes. If the use of doses greater than 1 kGy were approved, this technology might be very effective for use in fresh-cut tomatoes to eliminate significant populations of pathogens and to ensure the microbial quality of the product. 相似文献
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Particle density plays an important role in the design and operation of thermoconversion reactors fed with bed of particles such as softwood bark (SB). Little information is available on the single particle density of SB and charcoal derived. As SB and softwood char (SC) particles are highly irregular in shape and size, conventional methods of particle density measurement cannot be applied. A method known as the water soaking and kerosene immersion procedure, used for density measurement of sugarcane bagasse, has been tested and adapted to the density measurement of individual particles of softwood (SW), SB and SC. The particle density has been determined to be 360, 482 and 299 kg m−3 for SW, SB and SC, respectively. The average particle density of a typical SB feedstock sample comprised of ca. 30% SW and 70% SB was calculated to be 438 kg m−3. 相似文献
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Mangesh G. Kulkarni Sudhirprakash B. Sawant 《European Journal of Lipid Science and Technology》2002,104(7):387-393
Symmetrical wax esters were prepared directly from the C14–C22 alcohols using HBr and H2O2. Conversion of alcohol up to 98% was obtained. Physical properties such as melting point, refractive index, viscosity and specific gravity were determined for these wax esters at different temperatures. The physical properties of the synthetic wax esters were compared with those of some commercial samples of wax esters. The physical properties of the wax esters can be manipulated by starting with commercially available mixtures of alcohols. 相似文献
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Shirale DJ Bangar MA Park M Yates MV Chen W Myung NV Mulchandani A 《Environmental science & technology》2010,44(23):9030-9035
We report development, characterization, and testing of chemiresistive immunosensors based on single polypyrrole (Ppy) nanowire for highly sensitive, specific, label free, and direct detection of viruses. Bacteriophages T7 and MS2 were used as safe models for viruses for demonstration. Ppy nanowires were electrochemically polymerized into alumina template, and single nanowire based devices were assembled on a pair of gold electrodes by ac dielectrophoretic alignment and anchored using maskless electrodeposition. Anti-T7 or anti-MS2 antibodies were immobilized on single Ppy nanowire using EDC-NHS chemistry to fabricate nanobiosensor for the detection of corresponding bacteriophage. The biosensors showed excellent sensitivity with a lower detection limit of 10(-3) plaque forming unit (PFU) in 10 mM phosphate buffer, wide dynamic range and excellent selectivity. The immunosensors were successfully applied for the detection of phages in spiked untreated urban runoff water samples. The results show the potential of these sensors in health care, environmental monitoring, food safety and homeland security for sensitive, specific, rapid, and affordable detection of bioagents/pathogens. 相似文献