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71.
Heavy metals, lead (Pb) and mercury (Hg) are non-essential elements. Plants absorb these metals from soil, water and air through their roots and leaves. Heavy metals are the major environmental pollutants, which spread to soil through the use of pesticides, herbicides and micronutrient fertilizers, industrial effluents, decay of junk materials and sewage sludge, vehicular emissions, re-suspended road dust, diesel generator sets and coal-based thermal power plants. Sewage and sludge have contributed to heavy metal contamination of peri-urban lands and vegetable crops. The present review focuses on the effects of various concentrations of Hg on growth of young and mature seedlings as well as on nitrate reductase activity and nitrate assimilation in intact and excised seedling, especially the mechanism underlying nitrate reductase regulation by this heavy metal. Evidence indicates that mercury exerts significant adverse effects on the physiological activity of plants. 相似文献
72.
Ashutosh Mittal Tarun Kataria Gautam K. Das 《International Journal of Green Energy》2013,10(4):347-368
Evaporative cooling of water in a small porous clay vessel was studied under controlled humidity conditions. In steady-state experiments performed at an ambient temperature of 23 °C, the cooling effect increased from 4.7 to 8.3 °C as the ambient relative humidity decreased from 60 to 15%. External heat and mass transfer coefficients, estimated from the steady-state measurements, were used in mathematical models to predict the experimentally observed transient temperature variation of the water under ramp changes of the ambient relative humidity. With a prototypical cool chamber containing water tested in Kolkata, India under an ambient temperature of 34.5–35 °C, the cooling effect reached a maximum of 7 °C between 3 and 3:30 PM and then declined to 4.5 °C around 6 PM. 相似文献
73.
Zhang Nan Lai Hui Ying Gautam Archana De Kwek Darien Yu Dong Yibing Wang Qiang Ng Kee Woei 《Journal of Polymers and the Environment》2022,30(3):1045-1054
Journal of Polymers and the Environment - Hair contains about 80% keratins and 1–3% melanin packaged in melanosomes. Both of these are high-value and functional raw materials that have... 相似文献
74.
Islam Zubairul Ranganathan Muthukumarasamy Bagyaraj Murugesan Singh Sudhir Kumar Gautam Sandeep Kumar 《Environment, Development and Sustainability》2022,24(3):3146-3164
Environment, Development and Sustainability - The general aim of the present study was to understand the groundwater level change of period 2001–2020 using geostatistical analysis at village... 相似文献
75.
Environment, Development and Sustainability - 相似文献