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Mitra, A. K.
- Effect of Heavy Metal Contaminated Maize on Mammalian System
Abstract Views :126 |
PDF Views:3
Authors
Saurov Sett
1,
Debarati Bhattacharjee
1,
Ronita Mookerji
1,
Tasfia Rakib
1,
K. Sarkar
1,
A. K. Mitra
1
Affiliations
1 Department of Microbiology and Environmental Studies, St. Xaviers’s College, 30 Park Street, Kolkata-700 016, W.B., IN
1 Department of Microbiology and Environmental Studies, St. Xaviers’s College, 30 Park Street, Kolkata-700 016, W.B., IN
Source
Nature Environment and Pollution Technology, Vol 7, No 2 (2008), Pagination: 345-350Abstract
The result of anthropogenic activity has resulted in the entry of toxic heavy metals into the environment at any stage from mining to final use. During recycling and use it contaminates soil, crops, water, air, dust and food crops. The East Kolkata Wetland has high environmental concentrations of toxic pollutants including heavy metals in the soil because it receives the untreated sewage of Kolkata; different crops and vegetables including maize are grown here in this place. In the present investigation, the plant and animal models selected were maize and rats. The maize collected from the contaminated soil of East Kolkata wetlands was found to contain 12.5μg/mg dry-weight of lead. Cadmium was also tested but it was not present. Sixteen albino rats were divided into four groups: Group I served as control and was fed with normal diet; group II was fed with normal diet mixed with normal maize; group III was given contaminated maize from the East Kolkata wetlands mixed with normal diet and group IV was fed with a combination of 12.5μg/mg of lead chloride and normal diet. After 6 weeks, the rats were anaesthized with chloroform and then dissected. Changes in organ weight, body weight, haemoglobin percentage and lead content in various organs were determined. Short-term lead exposure showed enlargement of the kidney. In the liver, accumulation of fatty acids and lesions present were pronounced. Spleen mass had visibly increased and, in general, white patches or globules were observed. The SGPT count did not show any major changes. The body weight was found to reduce in the groups administered with lead salts and contaminated maize. But the one fed with lead contaminated maize showed partial increase. Analysis of lead in the organ samples showed the expected dose-dependent accumulation of the metal even when fed with a low concentration. There was a decrease in the weight of the liver from 2.5g to 1.9g, and increase in the weight of the spleen from 0.75g to 1g, and of kidney from 0.1g to 0.6g. There was also a notable decrease in the haemoglobin percentage of the third and fourth groups. The rats belonging to the first and second group were fed with normal food and they showed a haemoglobin percentage of 13.8% and 14.4% respectively. The third and fourth groups of rats showed a considerable fall in the haemoglobin percentage of 12.2% and 11.8% respectively.Full Text
- Economics of Irrigation In Water-Scare Regions : Study of Maharashtra
Abstract Views :411 |
PDF Views:0
Authors
Source
Artha Vijnana: Journal of The Gokhale Institute of Politics and Economics, Vol 31, No 1 (1989), Pagination: 1-129Abstract
Irrigation is crucial to the development of agriculture in India. It is necessary in order to ensure stability in crop production and fuller exploitation of cultivable land in all seasons. It is also necessary in order to derive and sustain benefits from biological improvements in crops, and technological improvements in cropping.
- From the Editor's Desk
Abstract Views :251 |
PDF Views:203
Authors
Source
Indian Welding Journal, Vol 26, No 1 (1993), Pagination: 1-1Abstract
At the outset I regret the delay in publishing "The Indian Welding Journal" arising out very' many reasons. My apologies for the same. This is a combined issue for October-December 1992 and January-March 1993.Full Text
- From the Editor's Desk
Abstract Views :225 |
PDF Views:195
Authors
Source
Indian Welding Journal, Vol 23, No 2 (1991), Pagination: 58-58Abstract
The Indian Institute of Welding completes its journey through 25 years for which all associated with it, directly or indirectly, can justifiably be proud of. The Institute has now grown adult and turned itself into one of the centres of assimilation and dissemination of informations on Welding Technology in this country. We must thank the founding fathers for their foresight and their pioneering efforts to make this happen.Full Text
- From the Editor's Desk
Abstract Views :224 |
PDF Views:209
Authors
Source
Indian Welding Journal, Vol 25, No 3 (1992), Pagination: 129-129Abstract
The process of Indian Economic reforms appears to have considerably slowed down - thanks to the stock scam. On top of this monsoon which has been hesitant so far this year has added uncertainty so far as growth prospects are concerned.Full Text
- From the Editor's Desk
Abstract Views :224 |
PDF Views:199
Authors
Source
Indian Welding Journal, Vol 25, No 2 (1992), Pagination: 64-64Abstract
One would perhaps accord a guarded welcome to the new economic policies being persued by the Government, which has culminated in the 'Watershed' central budget and the new Exim policy. This has undoubtedly freed the economy from the inefficiencies of licence-permit raj and exposed the Indian industry to international competition.Full Text
- From the Editor's Desk
Abstract Views :234 |
PDF Views:188
Authors
Source
Indian Welding Journal, Vol 23, No 3 (1991), Pagination: 124-124Abstract
The completion of the general elections to the tenth Lok Sabha and formation of a Govt, under the leadership of Shri PV Narashimha Rao has set at rest, at least for the time being, the uncertainties- political, social and economic - tint had engulfed the country for more than a year or so. One only hopes that the tensions caused first by temple - masjid fiasco and then by tragic assassination of former Prime Minister Mr. Rajiv Gandhi would soon be replaced by sober socio-political tolerance by all cross-section of people.Full Text
- From the Editor's Desk
Abstract Views :220 |
PDF Views:198
Authors
Source
Indian Welding Journal, Vol 24, No 4 (1991), Pagination: 184-184Abstract
The Silver Jubilee year 1991 would end with two very important events for Indian Welding Industry. One is the Annual event of the Institute - The NATIONAL WELDING SEMINAR and the other SOJOM - organised by Trichy Branch. Both the seminars will cover wide ranging subjects in the field of Welding Technology e.g. Welding Metallurgy, process and allied equipment&consumables, Weld quality assurance and testing, Safety, Welding education and training.Full Text
- From the Editor's Desk
Abstract Views :224 |
PDF Views:188
Authors
Source
Indian Welding Journal, Vol 25, No 1 (1992), Pagination: 1-1Abstract
Happy New Year! Let 1992 bring all-round prosperity to all. Reflecting back, 1991 had been a momentous year-One of those years when history is made or unmade and will be long remembered in mankind's modern civilisation.Full Text
- From the Editor's Desk
Abstract Views :217 |
PDF Views:198
Authors
Source
Indian Welding Journal, Vol 23, No 1 (1991), Pagination: 2-2Abstract
The National Welding Seminar 1990 held in Bombay last November evoked tremendous response from all those who matter in the welding industry in India. The seminar can stand out as one of the finest in recent memory in respect of the richness of the subjects covered when one considers the depth and span of the knowledge and the interactions that have emerged.Full Text
- Economics of Irrigation in Water-Scarce Regions:Study of Maharashtra
Abstract Views :168 |
PDF Views:0
Authors
Source
Journal of Indian School of Political Economy, Vol 24, No 1-4 (2012), Pagination: 315-348Abstract
* Chapter I: The Problem.
* Appendix-A: Present Systems of Distribution of Water.
* Chapter II: Pattern of Use of Water Under Canal Irrigation.
* Appendix Tables.
* Chapter III: Economics of the Use of Irrigation Water.
* Chapter IV: Returns to Irrigation Water Under Uncertainties.
- Energy Conservation in Welding
Abstract Views :208 |
PDF Views:4
Authors
Affiliations
1 ESAB India Ltd, IN
1 ESAB India Ltd, IN
Source
Indian Welding Journal, Vol 33, No 1 (2000), Pagination: 39-42Abstract
Energy costs have often been disregarded as being a minor part of the total welding co st.lt is discussed here that an inefficient power source consumes unnecessary extra energy which can be avoided by the right design and choice of the equipment.
There are also big differences in energy consumption between the welding methods & processes. Besides the energy costs, heat input also plays a major role with great significance for the metallurgical effects and thermal distortion.
On the macro level, one has to also consider the enormous savings in installation of new power stations apart from the adverse environmental effects of unnecessary power consumption. The problems with electromagnetic compatibility and the possible harmful effects from the electromagnetic fields on human beings is another issue.
- Identification of Weather Events from INSAT-3D RGB Scheme using RAPID Tool
Abstract Views :197 |
PDF Views:83
Authors
Affiliations
1 National Satellite Meteorological Centre, India Meteorological Department, New Delhi 110 003, IN
2 Banaras Hindu University, Varanasi 221 005, IN
1 National Satellite Meteorological Centre, India Meteorological Department, New Delhi 110 003, IN
2 Banaras Hindu University, Varanasi 221 005, IN
Source
Current Science, Vol 115, No 7 (2018), Pagination: 1358-1366Abstract
Real-time analysis of products and information dissemination (RAPID), a web-based quick visualization and analysis tool for INSAT satellite data has been presented for identification of weather events. The combination of channels using red-green-blue (RGB) composites of INSAT-3D satellite and its physical significant value content is presented. The solar reflectance and brightness temperatures are the major components of this scheme. The shortwave thermal infrared (1.6 μm), visible (0.5 μm) and thermal IR channels (10.8 μm) representing cloud microstructure is known as Day Microphysics (DMP) and the brightness temperature (BT) differences between 10.8, 12.0 and 3.9 μm is referred to as Night Microphysics (NMP). The thresholds technique have been developed separately for both the RGB products of two years (2015-17 of December to February) of data for the identification of fog, snow and low clouds. The validation of these thresholds has been carried out against in situ visibility data from IMD observatories. The RGBs, i.e. DMP and NMP have a reasonable good agreement with ground-based observations and Moderate Resolution Imaging Spectroradiometer (MODIS) data. This threshold technique yields a very good probability of fog detection more than 94% and 85% with acceptable false alarm conditions less than 8% and 10% for DMP and NMP respectively. The technique has significantly minimized the misclassification between low clouds, snow, and fog and found useful for day-to-day weather forecast.Keywords
INSAT-3D, RAPID, DMP, NMP, RGB.Full Text
References
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- Mitra, A. K., Sankar Nath and Sharma, A. K., Fog forecasting using rule-based fuzzy inference system. J. Indian Soc. Remote Sensing, 2008, 36(3), 243.
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- INSAT-3DR-Rapid Scan Operations for Weather Monitoring Over India
Abstract Views :272 |
PDF Views:100
Authors
M. Mohapatra
1,
A. K. Mitra
1,
Virendra Singh
1,
S. K. Mukherjee
1,
Kavita Navria
2,
Vikram Prashar
1,
Ashish Tyagi
1,
Atul Kumar Verma
1,
Sunitha Devi
1,
V. S. Prasad
3,
Mudumba Ramesh
4,
Raj Kumar
5
Affiliations
1 National Meteorological Satellite Centre, India Meteorological Department, New Delhi 110 003, IN
2 National Meteorological Satellite Centre, India Meteorological Department, New Delhi 110 003ii
3 National Centre for Medium Range Weather Forecasting, Noida 201 309, IN
4 Master Control Facility, Indian Space Research Organisation, Hassan 573 201, IN
5 Space Applications Centre, Indian Space Research Organisation, Ahmedabad 380 015, IN
1 National Meteorological Satellite Centre, India Meteorological Department, New Delhi 110 003, IN
2 National Meteorological Satellite Centre, India Meteorological Department, New Delhi 110 003ii
3 National Centre for Medium Range Weather Forecasting, Noida 201 309, IN
4 Master Control Facility, Indian Space Research Organisation, Hassan 573 201, IN
5 Space Applications Centre, Indian Space Research Organisation, Ahmedabad 380 015, IN
Source
Current Science, Vol 120, No 6 (2021), Pagination: 1026-1034Abstract
In order to observe severe weather conditions during cyclones, thunderstorms, etc., IMAGER instruments on-board INSAT3D/3DR have been built with a flexible scanning feature known as ‘rapid scan mode’. Using this feature, the number of scan lines over a given coverage region and the number of repetitions of the selected region can be programmed for scanning. Therefore, to understand the physical processes involved in convective clouds associated with severe weather phenomena, rapid scan of INSAT3DR mode is attempted. It has very high temporal resolution of approximately 4 min and 30 sec. The present study will help in better understanding of the physical processes of severe weather phenomena and in nowcasting. It will also help to improve the accuracy in the NWP model forecast through assimilation of radiances and atmospheric motion wind determined using rapid scan mode.Keywords
Nowcasting, Physical Processes, Rapid Scan Operations, Severe Weather Conditions, Weather Monitoring.Full Text
References
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- EUMETSAT, Meteosat-9 takes over rapid scanning service, 9 April 2013; http://www.eumetsat.int/Home/Main/News/Press_ Releases/831419?l=en
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- Sawada, Y., Okamoto, K., Kunii, M. and Miyoshi, T., Assimilating every-10-minute Himawari‐8 infrared radiances to improve convective predictability. J. Geophys. Res.: Atmos., 2019, 124, 2546–2561; https://doi.org/10.1029/2018JD029643.
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