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    Wyświetlanie 1-8 z 8
    Tytuł:
    Groundwater arsenic contamination in West Bengal: current scenario, effects and probable ways of mitigation
    Autorzy:
    Dey, T.K.
    Banerjee, P.
    Bakshi, M.
    Kar, A.
    Ghosh, S,
    Powiązania:
    https://bibliotekanauki.pl/articles/11026.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    ground water
    arsenic
    water contamination
    West Bengal
    mitigation
    human health
    Opis:
    During the past two decades, Arsenic (As) contamination via groundwater has become a serious issue worldwide and is now a major concern in the Indo-Bangladesh Gangetic delta. Arsenic enters human body through contaminated groundwater consumed as drinking water. Food safety in this region is also facing severe consequences as bio-accumulation of Arsenic is occurring in food crops irrigated with As-contaminated water. Chronic exposure to Arsenic can cause not only cancerous and non-cancer health effects. Reports suggest that about 20 % population in West Bengal is highly affected. Various techniques are being introduced to provide arsenic-free drinking water at an affordable cost. But a rigorous change in habit and mind set for procuring safe drinking water in those surviving in As-contaminated zones is the most essential step towards curbing the fatal consequences of As exposure. Harvesting rain water and utilization of proper purification techniques can be considered a possible alternative of safe drinking water.
    Źródło:
    International Letters of Natural Sciences; 2014, 08, 1
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Socio-environmental survey of an ecologically important hamlet of Darjeeling district, West Bengal, India
    Autorzy:
    Bhattacharya, S.
    Ghosh, G.
    Banerjee, T.
    Goswami, S.
    Das, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/11842.pdf
    Data publikacji:
    2015
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    socio-environmental survey
    ecologically important hamlet
    management
    biodiversity
    environment
    Darjeeling district
    West Bengal
    India
    Opis:
    Forest cover in hills is essential to maintain environmental, economic and ecological balances. North Bengal accounts for 3,086 sq km (26 %) of the 11,876 sq km area of classified forests in the state, and for nearly 5,000 sq km (40 %) of all land under tree cover. Upper Chatakpur is one of the emerging ecotourism spots of north Bengal, located at an altitude of 7887 feet in Darjeeling district. It is a 180 years old ethnic village with 19 houses and a population of about 89, and at an altitude of 7887 ft. It is about 8 km. from Sonada (26° 57' N, 88° 16' E), 22 km. from Darjeeling (26° 2' N, 88° 15' E) and 72 km. from Siliguri (26° 42' N, 88° 25' E). Upper Chatakpur Village situated within Senchal Wildlife Sanctuary, Darjeeling. The sanctuary with an area of 38.88 sq. km has an elevation of 1500-2600 m. The survey work was done in December, 2014 by visiting upper Chatakpur village and the primary data were gathered through field survey and direct contact with common people and authorized centers of the region. Surveys on the topography, demography, agriculture, livestock, water management, education, culture, health, waste management, transport, biodiversity, human animal conflict were done in this area. Medicinal plant diversity was studied in the village area and information was gathered from the local forest department centre. Information regarding the transport system was collected from the local transport office and syndicate. Census report was collected from the Sonada Panchayat Office. Health and education information was collected from the local primary school and the local sub health centre. Information on sustainable agricultural practices and waste management policies is collected through surveys in the village houses and agricultural fields. Biodiversity of Senchal Wildlife Sanctuary was documented by visiting the forest areas. Pictorial documentation was done in every phase of study. In spite of getting so much attention in the recent time, the village is not adequately developed. There is an urgent need for implementing sustainable management systems in the areas for the betterment of the socio-environmental structures. Some of the possible management strategies have been suggested for maintaining the social, environmental, economic and ecological balance of the region.
    Źródło:
    International Letters of Natural Sciences; 2015, 06
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microplankton size structure induced by a warm-core eddy in the Western Bay of Bengal: Role of Trichodesmium abundance
    Autorzy:
    Chinnadurai, K.
    Retnamma, J.
    Nagarathinam, A.
    Subramanian, P.R.
    Singaram, P.
    Shoba, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078908.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    microplankton
    size structure
    biomass
    Trichodesmium
    sea surface temperature
    wind
    sea level
    geostrophic current circulation
    chlorophyll a
    Bengal Bay
    Opis:
    Mesoscale warm-core eddies are common in the Bay of Bengal (BoB), and this study in the western BoB during Pre-Southwest Monsoon (April 2015) presents how a prolonged warmcore core eddy could modify the microplankton biomass and size structure. To investigate this, field sampling and laboratory analyses were augmented with satellite data sets of sea surface temperature (SST), winds, mean sea level anomaly (MSLA), geostrophic currents and chlorophyll-a. High SST with positive MSLA (≥ 20 cm) and a clockwise circulation, represented the occurrence of a large warm-core eddy in the western BoB. Time series data evidenced that it was originated in the mid of March and persistent there till early June, which in turn caused a decrease in the surface nutrients and chlorophyll-a. The abundance and biomass of microplankton were negligible in the warm-core eddy region. FlowCAM data showed a significant decrease in the autotrophic microplankton parameters in the warm-core eddy (av. 13 ± 9 ind. L−1 and 0.1 ± 0.04 μgC L−1, respectively) as compared to the surrounding locations (av. 227 ± 143 ind. L−1 and 0.8 ± 0.5 μgC L−1, respectively). Low nutrients level in the warm core eddy region favoured high abundance of needle-shaped phytoplankton cells dominated by Trichodesmium cells. As a result, the size of micro-autotrophs in the warm-core eddy was larger (av. 91,760 ± 12,902 μm3 ind.−1) than its outside (av. 50,115 ± 21,578 μm3 ind.−1). This is a deviation from our belief that the oligotrophy decreases the phytoplankton size. We showed here that the above understanding might not be infallible in warm-core eddies in the northern Indian Ocean due to its inducing effect on the Trichodesmium abundance.
    Źródło:
    Oceanologia; 2021, 63, 3; 283-300
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocean fronts detection over the Bay of Bengal using changepoint algorithms - A non-parametric approach
    Autorzy:
    Reddem, V.S.
    Muthalagu, R.
    Bekkam, V.R.
    Eluri, P.R.R.
    Jampana, V.
    Nimit, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078823.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    ocean front
    detection
    satellite image
    change point analysis
    algorithm
    advanced very high resolution radiometer
    Bengal Bay
    Opis:
    Oceanic fronts are regions over the oceans where a significant change in the characteristics of the water masses is observed. Advanced Very High Resolution Radiometer (AVHRR) satellite imagery over the Bay of Bengal shows regions that are populated by frontal structures. Over the Bay of Bengal, some of the strongest gradients in temperature and salinity are observed. In recent years, there has been a tremendous growth in the availability of satellite imagery and the necessity of automated fast detection of the frontal features is needed for services like potential fishing zones over open oceans. In this article, an algorithm to infer oceanic fronts over the Bay of Bengal is described using changepoint analysis. The changepoint algorithm is combined in a novel way with a contextual median filter to detect frontal features in AVHRR imagery. The changepoint analysis is a non-parametric technique that does not put thresholds on the gradients of brightness temperatures of the satellite imagery. In the open oceans, the gradients of temperature and salinity are not sharp and changepoint analysis is found to be a useful complementary technique to the existing front detecting methods when combined with contextual median filters.
    Źródło:
    Oceanologia; 2021, 63, 4; 438-477
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Haematological changes among construction workers exposed to cement dust in West Bengal, India
    Autorzy:
    Mandal(Majee), A.
    Suva, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1916443.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    construction workers
    haemoglobin
    PCV
    platelet count
    WBC count
    RBC indices
    Opis:
    Purpose: This study measured haematological parameters in construction workers exposed to cement dust, silica and other hazardous materials. This was done in order to identify a simple, readily available, and cost effective screening test that could help to identify the presence of disease and its severity in workers potentially related to their work space. Materials and methods: The study was composed of 150 construction workers and 52 participants in an unexposed control group, with ages ranging from 15-60 years. Blood samples were collected from each participant and percentage of haemoglobin, total RBC count, WBC count, platelet count, and different RBC indices were analyzed. Results: The haemoglobin concentration, PCV, and MCV decreased significantly, but the MCHC and eosinophil counts increased significantly in comparison to the control group, though the increase in the monocyte count was not significant. No significant changes in haematological parameters with a year of exposure have been found. However, the percentage of prevalence of anaemia on the basis of haemoglobin concentration and PCV value were higher in construction workers in comparison to members of the control group. Conclusion: This study recommends that construction workers working in hazardous environments must support health education and should regularly use protective devices in their workplace. They must also have regular medical checkups, which might help detect disease in early stages.
    Źródło:
    Progress in Health Sciences; 2014, 4, 1; 88-94
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Erythrocyte functional status and lipid profile of coal mine workers of West Bengal, India
    Autorzy:
    Prasad, S.K.
    Bhattacharjee, A.
    Bandyopadhyay, P.
    Pal, S.
    Syamal, A.K.
    Mukherjee, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1916566.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    Coal miners
    antioxidant insufficiency
    blood lipid profiles
    erythrocyte osmotic fragility
    oxidative stress
    Opis:
    Purpose: Despite people suffering from several forms of ill health, constant exposure to toxic wastes and chronic diseases as a result of mining, there is a tragic gap in the availability of ‘scientific’ studies and data on the health hazards of mining in India. This study was proposed to understand better the relationship between occupational exposure to coal, blood lipid profiles and red blood cell (RBC) functional status of coal workers. Materials and methods: Blood samples were obtained from coal miners (n=32) of an underground mine in West Bengal. Blood lipid profiles and RBC functional status were determined. Students’ t-test and Pearson correlation analyses were completed to analyze the data. Results: Compared to the control subjects, significantly higher levels of cholesterol (p<0.01), triglycerides (p<0.01), LDL (p<0.001), and VLDL (p<0.001) were observed in coal miners. HDL, Hb, Na+-K+ATPase and SOD activity were significantly (p<0.001) lower in coal miners, whereas MDA levels (p<0.001) and osmotic fragility in coal miners were increased significantly (p<0.01). Conclusions: Our study indicates that elevated MDA and antioxidant insufficiency caused disruption in the structural integrity of erythrocyte, which may be a pathophysiological mechanism in the progression of disease in coal miners. Also, cardiovascular disease risk factors were more prevalent in the coal miners.
    Źródło:
    Progress in Health Sciences; 2014, 4, 2; 14-21
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two New Species of Myxobolus Bütschli, 1882 (Myxozoa: Myxosporea: Bivalvulida) from Food Fishes of West Bengal, India – a Light and Scanning Electron Microscopy Study
    Autorzy:
    Basu, Saugata
    Modak, Biplob Kr.
    Haldar, Durga P.
    Powiązania:
    https://bibliotekanauki.pl/articles/763742.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
    Tematy:
    Myxobolus analfinus sp. n., Myxobolus debsantus sp. n., Myxozoa, India
    Opis:
    Two new myxozoan species – Myxobolus analfinus sp. n. and Myxobolus debsantus sp. n. are described from Heteropneustes fossilis (Bloch) and Catla-Rohu hybrid carp [Male parent fish Catla catla (Hamilton Buchanan) × Female parent fish Labeo rohita (Hamilton- Buchanan)], respectively. Spores of Myxobolus analfinus are oval with slightly acuminate anterior end and large prominent intercapsular notch. On the other hand, in Myxobolus debsantus spores are spherical to oval with intercapsular notch and posterior sutural markings. In both the myxobolid species polar capsules are unequal. The detailed light microscopic and SEM structures and measurements of these two myxozoans are given.
    Źródło:
    Acta Protozoologica; 2009, 48, 1
    1689-0027
    Pojawia się w:
    Acta Protozoologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cardiovascular Load During Summer Work of Two Age Groups of Van-Rickshaw Pullers in West Bengal, India
    Autorzy:
    Sahu, S.
    Maity, S. G.
    Moitra, S.
    Sett, M.
    Haldar, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/90511.pdf
    Data publikacji:
    2013
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    van-rickshaw puller
    age
    hot environment
    cardiovascular load
    cardiac cost
    wiek
    gorące środowisko pracy
    układ krążenia
    serce
    Opis:
    Van-rickshaw is a popular mode of transport of people and merchandise in developing countries. The purposeof this study was to assess the effect of age on cardiovascular load of van-rickshaw pullers in the summer season (March–June) in real situations. In 142 participants, divided into 2 age groups (25–40 and 41–55 years), cardiovascular load was assessed on the basis of working and partial recovery heart rate (HR), predicted maximal HR, working maximal HR, average working HR, percentage of reserved HR, sum of recovery heart beats, percentage of recovery, relative and net cardiac cost, etc. Except for percentage of recovery, all parameters differed significantly between the groups and were significantly correlated with age. As this activity is very stressful, it places a heavy demand on the cardiovascular system. Therefore, age is an important factor for sustainability of the work, especially in a hot environment. Some ergonomic interventions are necessary to reduce cardiovascular load.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2013, 19, 4; 657-665
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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