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11.
Neha Badola Ashish Bahuguna Yoel Sasson Jaspal Singh Chauhan 《Frontiers of Environmental Science & Engineering》2022,16(1):7
12.
Impact of industrial air pollutants on some biochemical parameters and yield in wheat and mustard plants 总被引:1,自引:0,他引:1
The present study was carried out to determine the impacts of SO2, NO
x
, SPM and RSPM, the most common air pollutants, generated mainly due to industries and vehicles, on some biochemical parameters
and yield in wheat and mustard plants during 2006. The concentration of SO2, NO
x
, SPM and RSPM was determined at the polluted sites across the seasons, which ranged between 14.29–18.10, 20.81–22.43, 483.65–500.85
and 160.67–171.18 μg m−3, respectively. The wheat and mustard plants grown at polluted sites showed significant reduction in chlorophyll ‘a’, chlorophyll ‘b’, total chlorophyll, carotenoid, ascorbic acid, pH, relative water content and yield. The data were further analyzed using
a two way ANOVA. It is concluded that the ambient air pollutants have a potential adverse impact on biochemical parameters,
which further leads to a reduction in the yield of wheat and mustard crops. 相似文献
13.
The lacewing Chrysopa septempunctata Wesmael is an important, common predator of several insects in China, Japan, Russia, and many parts of Europe. Our field trapping experiments in northeast China showed that males of this green lacewing are strongly attracted to the lacewing pheromone of Chrysopa oculata Say, (1R,2S,5R,8R)-iridodial. The induced plant volatile, methyl salicylate, was unattractive to C. septempunctata by itself at the concentration tested, but synergistic when combined with iridodial where the lacewing population was high. (1R,4aS,7S,7aR)-Nepetalactol and (4aS,7S,7aR)-nepetalactone (aphid sex pheromone components) caught significantly more males of C. septempunctata than did blank control traps, but were inferior to iridodial dispensers, which remained strongly attractive to C. septempunctata males for at least 2.5 months. These results indicate that (1R,2S,5R,8R)-iridodial is a powerful attractant for C. septempunctata, and may have great potential for enhanced biological control of garden, agricultural, and forest insect pests. 相似文献
14.
Salman Mohammad Chauhan Ranchan Singh Tej Prabakaran Rajendran Kim Sung Chul 《Environmental science and pollution research international》2023,30(13):36259-36275
Environmental Science and Pollution Research - The effect of the flow and geometric parameters of a dimple-roughened absorber plate on the enactment of solar air collectors (SACs) with air-impinged... 相似文献
15.
Chauhan RS Gopinath S Razdan P Delattre C Nirmala GS Natarajan R 《Waste management (New York, N.Y.)》2008,28(11):2140-2145
Expanded polystyrene is one of the polymers produced in large quantities due to its versatile application in different fields. This polymer is one of the most intractable components in municipal solid waste. Disposal of polymeric material by pyrolysis or catalytic cracking yields valuable hydrocarbon fuels or monomers. Literature reports different types of reactors and arrangements that have uniform temperatures during pyrolysis and catalytic cracking. The present study focuses on reducing the temperature to maximize the quantity of styrene monomer in the liquid product. A bench scale reactor has been developed to recover the styrene monomer and other valuable chemicals. Experiments were carried under partial oxidation and vacuum conditions in the temperature range of 300-500 degrees C. In the pyrolysis optimization studies, the best atmospheric condition was determined to be vacuum, the pyrolysis temperature should be 500 degrees C, yield of liquid product obtained was 91.7% and yield of styrene obtained was 85.5%. In the characterization studies, distillation and IR spectroscopy experiments were carried out. The remaining of the liquid product comprises of benzene, ethyl benzene, and styrene dimers and trimers. 相似文献
16.
ABSTRACT: The non-steady drawdown distribution near a cavity well discharging from an infinite non-leaky artesian aquifer is presented. The variation of drawdown with time and distance caused by a cavity well of constant discharge in a confined aquifer of uniform thickness and uniform permeability is obtained. The solution is expressed in a series form which converges rapidly so that only two terms of the series are needed to obtain an accuracy of more than 95 percent. A simplified approach has been suggested to find the aquifer characteristics. 相似文献
17.
Chauhan SV Chaurasia B Rana A 《Journal of environmental biology / Academy of Environmental Biology, India》2004,25(3):291-297
Cassia siamea plants growing at two different sites (polluted and non-polluted) on two important roads of Agra city exhibited significant differences in their flowering phenology and floral morphology. The flowering in plants growing at polluted site is delayed and there was a marked reduction in flowering density, flowering period, size of floral parts, pollen fertility, fruit and seed-set. SEM observations revealed the presence of well developed glandular structures and reduction in the number and size of large stomata on the anther surface at polluted site. These changes were found to be closely associated with the extent of air pollution caused mainly by significant in the number of automobiles. 相似文献
18.
Energy is a vital and growing need for human activities such as transport, agriculture and industry. The transport and agriculture
sectors are major consumers of fossil fuel. However, availability of fossil fuels is limited. The use of fossil fuels is of
increasing environmental concerns because it produces toxic airborne particulates and greenhouse gases such as CO2. The increasing industrialization and motorization of the world led to a steep rise for the demand of petroleum-based fuels.
Hence, it is necessary to seek alternative fuels, which can be produced from resources available locally within the country
such as alcohol, biodiesel and vegetable oils. Biodiesel is defined as the mono alkyl esters of vegetable oils or animal fats.
Biodiesel is the best candidate for diesel fuels in the diesel engines. The advantage of biodiesel over gasoline and petroleum/diesel
is its eco-friendly nature. This article reviews the production, characterization and current status of biofuels mainly biodiesel
along with the environmental impacts of particulate matter, greenhouse gas emissions originated from biodiesel. 相似文献
19.
Reena Sharma Susheel Kalia Balbir S. Kaith Amit Kumar Pankaj Thakur D. Pathania Manoj K. Srivastava 《Journal of Polymers and the Environment》2017,25(2):176-191
Ggum-based conducting hydrogels possessing dye removal and antibacterial property were developed by two-step free-radical aqueous polymerization method. Conductivity was introduced with polyaniline (PANI) chains incorporated within the crosslinked network of Ggum-poly(itaconic acid) superabsorbent. The material properties of the synthesized samples were characterized using FTIR spectroscopy, thermal analysis and scanning electron microscopy techniques. Results showed that synthesized samples exhibited the best antibacterial activity against Gram-positive bacteria. Synthesized samples were found to be effective in removal of toxic methylene blue (MB) dye from the waste water. The adsorption kinetics of superabsorbents has been described by using pseudo first and pseudo second order kinetics models. Furthermore, application of hydrogels to improve the water retention properties of different soils was also studied for agricultural purpose. 相似文献
20.
Sippy K. Chauhan Sangita Sharma Anuradha Shukla S. Gangopadhyay 《Environmental science and pollution research international》2010,17(9):1493-1501
Bitumen is a black, thermoplastic, hydrocarbon material derived from the processing of crude oil. At ambient temperature,
bitumen is solid and does not present any health/environmental risks. This is one of the main reasons that bitumen is widely
used for road construction all over the world. But during manufacturing/modification according to its application, storage,
transportation, and use of bitumen is heated giving off various hydrocarbons emissions. In recent years, there has been increasing
interest in investigating the potential of bitumen emissions to cause health effects. This is mainly because of the reason
that bitumen has small amount of poly-aromatic hydrocarbons, along with some other volatiles like benzene, toluene, etc.,
which are known to be carcinogenic in nature. Thus, assessment of the emission characteristics and health hazards of bitumen
fumes may have far reaching industrial economic and public health implications. In this review, we will discuss about the
emission characteristics from bitumen, asphalts, or road construction, which is mainly contributed by bitumen fumes. Sampling
strategies and analytical methods employed are also described briefly. 相似文献