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排序方式: 共有211条查询结果,搜索用时 31 毫秒
121.
Y. Raja Sekhar K. V. Sharma Subhash Kamal 《Environmental science and pollution research international》2016,23(10):9411-9417
The solar flat plate collector operating under different convective modes has low efficiency for energy conversion. The energy absorbed by the working fluid in the collector system and its heat transfer characteristics vary with solar insolation and mass flow rate. The performance of the system is improved by reducing the losses from the collector. Various passive methods have been devised to aid energy absorption by the working fluid. Also, working fluids are modified using nanoparticles to improve the thermal properties of the fluid. In the present work, simulation and experimental studies are undertaken for pipe flow at constant heat flux boundary condition in the mixed convection mode. The working fluid at low Reynolds number in the mixed laminar flow range is undertaken with water in thermosyphon mode for different inclination angles of the tube. Local and average coefficients are determined experimentally and compared with theoretical values for water-based Al2O3 nanofluids. The results show an enhancement in heat transfer in the experimental range with Rayleigh number at higher inclinations of the collector tube for water and nanofluids. 相似文献
122.
123.
M. Shah Nawaz Chowdhury M. Shahadat Hossain Nani Gopal Das Prabal Barua 《Journal of Coastal Conservation》2011,15(1):163-180
The Naaf River estuary is one of the large estuaries in the Bangladesh coastal region not to have been affected by extensive
human disturbance. This research provides information about the fisheries diversity status by Estuarine Set Bag Net (ESBN)
sampling relation to physicochemical variables in both spatio-temporal scales. About 25 km of the lower estuary was divided
into six zones for sample collection by considering the accessibility and availability of the ESBN operation, fish landing
centers and location of the fishing villages. In total 48 samples have been analyzed which were taken throughout March to
October 2006. To quantify the species diversity, all fisheries data were analyzed by using EstimateS and EcoSim software which
accounts the different diversity indices viz., species richness, Shannon–Wiener diversity Index, Dominance and Evenness index.
The research results demonstrate that the Naaf River estuary is a habitat of 161 (species richness, Sobs = 161, Choa 1 = 162 ± 2.34,
ACE = 161.73) different species which belong to 98 fin fishes, 23 shrimps and prawns, 13 crabs, 11 molluscs, 3 echinoderms,
4 other crustaceans; while 9 remain unidentified. Results on the aquatic environment, mainly salinity and turbidity were found
to have a major influence on their occurrence and distribution. All the findings indicated that the Naaf River estuary is
a highly productive system and provides a favourable environment for large variety of estuarine species assemblages. 相似文献
124.
Paudel Keshav R. Mehta Meenu Yin Geena Hew Suet Yen Lee Li Malyla Vamshikrishna Patel Vyoma K. Panneerselvam Jithendra Madheswaran Thiagarajan MacLoughlin Ronan Jha Niraj Kumar Gupta Piyush Kumar Singh Sachin Kumar Gupta Gaurav Kumar Pradeep Oliver Brian G. Hansbro Philip M. Chellappan Dinesh Kumar Dua Kamal 《Environmental science and pollution research international》2022,29(31):46830-46847
Environmental Science and Pollution Research - Non-small cell lung cancer (NSCLC) is reported to have a high incidence rate and is one of the most prevalent types of cancer contributing towards 85%... 相似文献
125.
Almutairi Mubarak Harb Kamal Marey Omar Almutairi Khalid 《Environmental science and pollution research international》2022,29(59):88587-88605
Environmental Science and Pollution Research - Currently, Saudi Arabia has very limited renewable energy generation capacity, as most of the country’s electricity sector is dependent on cheap... 相似文献
126.
Autoantibodies and autoimmune disorders in SARS-CoV-2 infection: pathogenicity and immune regulation
Darmarajan Thiviya Paudel Keshav Raj Candasamy Mayuren Chellian Jestin Madheswaran Thiagarajan Sakthivel Lakshmana Prabu Goh Bey Hing Gupta Piyush Kumar Jha Niraj Kumar Devkota Hari Prasad Gupta Gaurav Gulati Monica Singh Sachin Kumar Hansbro Philip Michael Oliver Brian Gregory George Dua Kamal Chellappan Dinesh Kumar 《Environmental science and pollution research international》2022,29(36):54072-54087
Environmental Science and Pollution Research - Coronavirus disease 2019 (COVID-19) is an infectious disease associated with the respiratory system caused by the SARS-CoV-2 virus. The aim of this... 相似文献
127.
Abdullah Al Mamun Akhtar Aysha Barua Hillol Kamal Abu Hena Mustafa Islam Md. Shafiqul AftabUddin Sheikh Idris Mohd Hanafi Abualreesh Muyassar H. Modeo Letizia 《Environmental science and pollution research international》2022,29(44):66389-66404
Environmental Science and Pollution Research - Macroinvertebrate community in the intertidal setup plays an important role in coastal ecosystem functions and biogeochemical cycle. However,... 相似文献
128.
Atalanta Narayan Chowdhury S.K. Manna A.P. Sharma C. Bandopadhyay K. Pramanik 《毒物与环境化学》2015,97(5):538-551
The study aimed to examine the contamination status of arsenic (As) in excavated small water bodies, commonly known as ponds – the integral part of daily life in the arsenic-affected rural areas of West Bengal, India in comparison to the unaffected areas. The ponds of the contaminated area had higher levels of As: water 2–174 µg L?1 (mean 31 ± 2 µg L?1) and sediment 1.3–37.3 mg kg?1 (mean 10.3 ± 0.4 mg kg?1), than those from the unaffected area: water 1–8 µg L?1 (mean 4 ± 0 µg L?1) and sediment 1.4–5.3 mg kg?1 (mean 3.0 ± 0.1 mg kg?1). A moderate positive correlation was observed between the water and sediment arsenic content of the ponds of the arsenic-affected region (r = 0.688, n = 277, p < 0.0001). Contaminated ground water, either as direct input or through agricultural washings, was found to be the major contributor of arsenic pollution to these ecosystems. Seasonal variations were not prominent. This study emphasized the beneficial role of using the studied ecosystems over the highly contaminated ground water for various livelihood activities in the Gangetic delta region. 相似文献
129.
With parks and protected areas insufficient to sustain global biodiversity, the role of private land in biodiversity conservation is becoming increasingly significant. This paper reviews global voluntary and involuntary strategies for private land conservation. Involuntary strategies can achieve effective conservation outcomes, but often lack social acceptability. In contrast, voluntary strategies enjoy greater social acceptance but may not achieve sufficient uptake to have meaningful conservation objectives. Based on the review, we propose a classification system for private land conservation as a complement to the International Union for Conservation of Nature's (IUCN's) classification of global protected areas. The classification system provides a framework for identifying and describing conservation strategies on private land on the dimension of tenure and security. It also identifies opportunities and vulnerabilities in achieving conservation on private land while emphasising the need for systematic data collection similar to IUCN's efforts for protected areas. 相似文献
130.