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RISS 인기검색어
- 검색키워드
- 저자 : Amit Dutta (검색결과 5 건)
- 무료
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- 유료
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A Comprehensive Study on Solid Waste Vehicle Routing and Tracking – a Case Study on Kolkata City
Koushik Paul,Amit Dutta,Akhouri Pramod Krishna 대한토목학회 2016 KSCE JOURNAL OF CIVIL ENGINEERING Vol.20 No.1
Kolkata city generates about 3500 Metric Ton (MT) of solid waste per day. Waste collected at storage vats/containers is transported to disposal ground at Dhapa by Kolkata Municipal Corporation (KMC) departmental vehicles and hired vehicles. Collection, segregation and transportation of municipal solid waste in KMC area is unplanned and chaotic; there is no uniformity in the size of containers/open vats and the size and haulage capacity of transport vehicles. The operational efficiency of KMC transport system is about 50%, with a fleet composed of 30-35% old vehicles. KMC spends 70-75% of its budget on collection of solid wastes, 20-25% on transportation and less than 5% on disposal. KMC allocates different types of collection vehicles to different types of containers/ open vats depending on waste generation at a location and compatibility of the vehicles with the storage receptacles. It was, thus, a challenge to present an acceptable, realistic solution optimising the waste vehicle routes, thus cutting down on the transportation costs and increasing overall efficiency. ArcGIS Desktop has been used to determine least cost paths for collection and transportation of wastes; while low-cost tracking methods has been attempted using ArcGIS and Garmin 72H GPS set.
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Characterization and Antioxidant Potential of a Carotenoid from a Newly Isolated Yeast
Nirlipta Saha,Amit Kumar Samanta,Surabhi Chaudhuri,Debjani Dutta 한국식품과학회 2015 Food Science and Biotechnology Vol.24 No.1
A newly isolated yeast strain was identified and explored for characteristic growth and pigment production in batch cultures. Based on nucleotide homology and phylogenetic analysis, the strain was identified as Sporidiobolus pararoseus DAGIII (Accession ID-KF724150). Pigment production was carried out using 1% (v/v) of an inoculum at 25ºC and 120 rpm after incubation for 5 days. By HPLC, Elemental, and FTIR analysis, the produced pigment was identified as β-carotene. The antiradical activity was measured and the half maximal inhibitory concentration (IC50) value was 449.11 μg/mL. Optimization of β-carotene production was achieved using a Plackett-Burman design and response surface methodology. A maximum concentration of 15.2614 mg/L of β-carotene was obtained for cultures in a medium containing 21.77 gm/L of dextrose, 20 gm/L of peptone, and 10 gm/L of yeast extract with incubation at 26ºC, an initial pH of 5.3, a shaker speed of 120 rpm, and a percentage inoculum=1.5%.
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A comprehensive optimization model for integrated solid waste management system: A case study
Koushik Paul,Subhasish Chattopadhyay,Amit Dutta,Akhouri P. Krishna,Subhabrata Ray 대한환경공학회 2019 Environmental Engineering Research Vol.24 No.2
Solid waste management (SWM) is one of the poorly rendered services in developing countries – limited resources, increasing population, rapid urbanization and application of outdated systems leads to inefficiency. Lack of proper planning and inadequate data regarding solid waste generation and collection compound the SWM problem. Decision makers need to formulate solutions that consider multiple goals and strategies. Given the large number of available options for SWM and the inter-relationships among these options, identifying SWM strategies that satisfy economic or environmental objectives is a complex task. The paper develops a mathematical model for a municipal Integrated SWM system, taking into account waste generation rates, composition, transportation modes, processing techniques, revenues from waste processing, simulating waste management as closely as possible. The constraints include those linking waste flows and mass balance, processing plants capacity, landfill capacity, transport vehicle capacity and number of trips. The linear programming model integrating different functional elements was solved by LINGO optimization software and various possible waste management options were considered during analysis. The model thus serves as decision support tool to evaluate various waste management alternatives and obtain the least-cost combination of technologies for handling, treatment and disposal of solid waste.
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Use of thiopurines in inflammatory bowel disease: an update
( Arshdeep Singh ),( Ramit Mahajan ),( Saurabh Kedia ),( Amit Kumar Dutta ),( Abhinav Anand ),( Charles N. Bernstein ),( Devendra Desai ),( C. Ganesh Pai ),( Govind Makharia ),( Harsh Vardhan Tevethia 대한장연구학회 2022 Intestinal Research Vol.20 No.1
Inflammatory bowel disease (IBD), once considered a disease of the Western hemisphere, has emerged as a global disease. As the disease prevalence is on a steady rise, management of IBD has come under the spotlight. 5-Aminosalicylates, corticoste roids, immunosuppressive agents and biologics are the backbone of treatment of IBD. With the advent of biologics and small molecules, the need for surgery and hospitalization has decreased. However, economic viability and acceptability is an im portant determinant of local prescription patterns. Nearly one-third of the patients in West receive biologics as the first/initial therapy. The scenario is different in developing countries where biologics are used only in a small proportion of patients with IBD. Increased risk of reactivation of tuberculosis and high cost of the therapy are limitations to their use. Thiopurines hence become critical for optimal management of patients with IBD in these regions. However, approximately one-third of patients are intolerant or develop adverse effects with their use. This has led to suboptimal use of thiopurines in clinical practice. This review article discusses the clinical aspects of thiopurine use in patients with IBD with the aim of optimizing their use to full therapeutic potential. (Intest Res 2022;20:11-30)
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Clinical spectrum of elderly-onset inflammatory bowel disease in India
Yogesh Kumar Gupta,Arshdeep Singh,Vikram Narang,Vandana Midha,Ramit Mahajan,Varun Mehta,Dharmatma Singh,Namita Bansal,Madeline Vithya Barnaba Durairaj,Amit Kumar Dutta,Ajit Sood 대한장연구학회 2023 Intestinal Research Vol.21 No.2
Background/Aims: Inflammatory bowel disease (IBD) is increasingly being recognized in elderly patients. Data on clinical spectrum of elderly-onset IBD patients is lacking from India. Methods: A cross-sectional retrospective analysis of a prospectively maintained database of patients diagnosed with IBD was conducted at 2 centers in India. The clinical spectrum of elderly-onset IBD including demographic profile (age and sex), clinical presentation, disease characteristics (disease behavior and severity, extent of disease), and treatment were recorded and compared with adult-onset IBD. Results: During the study period, 3,922 (3,172 ulcerative colitis [UC] and 750 Crohn’s disease [CD]) patients with IBD were recorded in the database. A total of 186 patients (4.74%; 116 males [62.36%]) had elderly-onset IBD (69.35% UC and 30.64% CD). Diarrhea, blood in stools, nocturnal frequency and pain abdomen were the commonest presentations for UC, whereas pain abdomen, weight loss and diarrhea were the most frequent symptoms in CD. For both elderly onset UC and CD, majority of the patients had moderately severe disease. Left-sided colitis was the commonest disease location in UC. Isolated ileal disease and inflammatory behavior were the most common disease location and behavior, respectively in CD. 5-Aminosalicylates were the commonest prescribed drug for both elderly onset UC and CD. Thiopurines and biologics were used infrequently. Prevalence of colorectal cancer was higher in elderly onset IBD. Conclusions: Elderly onset IBD is not uncommon in India. Both the elderly onset UC and CD were milder, with no significant differences in disease characteristics (disease extent, location and behavior) when compared to adult-onset IBD. Colorectal cancer was more common in elderly onset IBD.
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