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Maitreya Anuja Pal Smita Qureshi Asifa Reyed Reyed M. Purohit Hemant J. 《Environmental science and pollution research international》2022,29(4):4911-4929
Environmental Science and Pollution Research - Membrane biofouling in water purification plants is a serious issue of worldwide concern. Various chemical, physical, and biochemical processes are... 相似文献
63.
Nickel-resistant bacteria isolated from underneath Ni-hyperaccumulators growing on serpentine soils were screened for production
of polyhydroxyalkanoates. These rhizobacteria accumulated poly-3-hydroxybutyric acid [P(3HB)] accounting 3.9–67.7% of cell
dry weight during growth in gluconate and/or glucose. Cupriavidus pauculus KPS 201 utilized only gluconate and accumulated about 67.7% P(3HB) while, Bacillus firmus AND 408 utilized both carbon sources for polymer synthesis. The isolates being resistant to Ni also accumulated substantial
amount of P(3HB) when grown in presence of the heavy metal and this was revealed by transmission electron microscopic studies.
Although B. firmus AND 408 produced only P(3HB) at higher concentrations of gluconate, C. pauculus KPS 201 synthesized copolymer of 3-hydroxybutyric acid (3HB) and 3-hydroxyvaleric acid (3HV) [P(3HB-co-3HV)]. In presence
of 0.8% gluconate and 4 mM Ni, KPS 201 cells produced PHA amounting 81% CDW, which contained 76 and 24 mol% 3HB and 3HV monomers,
respectively. 相似文献
64.
Anant Yadav Piyush Choudhary Neelam Atri Sebastian Teir Srikanth Mutnuri 《Environmental science and pollution research international》2016,23(22):22284-22291
The objective of the present study was to set up a small-scale pilot reactor at ONGC Hazira, Surat, for capturing CO2 from vent gas. The studies were carried out for CO2 capture by either using microalgae Chlorella sp. or a consortium of microalgae (Scenedesmus quadricauda, Chlorella vulgaris and Chlorococcum humicola). The biomass harvested was used for anaerobic digestion to produce biogas. The carbonation column was able to decrease the average 34 vol.% of CO2 in vent gas to 15 vol.% of CO2 in the outlet gas of the carbonation column. The yield of Chlorella sp. was found to be 18 g/m2/day. The methane yield was 386 l CH4/kg VSfed of Chlorella sp. whereas 228 l CH4/kg VSfed of the consortium of algae. 相似文献
65.
Malay Kumar Pramanik Sumantra Sarathi Biswas Biswajit Mondal Raghunath Pal 《Environment, Development and Sustainability》2016,18(6):1635-1655
The Krishna–Godavari coastal region in east coast of India has a 525.15-km-long coastline with low-lying tidal mudflats, beaches, mangrove swamp, creek and tidal channels. Recently, the increasing frequency of tropical cyclones in the Bay of Bengal, i.e., Phylin and Hudhud in Andhra Pradesh coast, and the devastating impact of the 2004 tsunami in India increased the significance in assessing the vulnerability of the coastal lands to inundation and flooding, notably in the context of climate change-induced sea level rise. This study aims to estimate a coastal vulnerability index (CVI) for the coastal subregion of Krishna–Godavari delta and to use the calculated index to evaluate the vulnerability of 14 coastal talukas of the Krishna–Godavari delta region. This CVI is calculated by using four geological and three physical parameters characterizing the vulnerability of the study coastal region, including regional slope, coastal elevation, geomorphology, significant wave height, mean tidal range and relative sea level using different conventional and remotely sensed data. Using a composite coastal vulnerability index based on the relative risk rating of those parameters, each of the 14 coastal talukas was classified according to their vulnerability. The CVI results depict that coasts are least and most vulnerable to inundation, flooding and erosion of coastal lands where geological parameters are more efficient to CVI. The paper alerts to decision makers and planners to mitigate the natural disaster and manage the coastal zone and is a primary step toward prioritizing coastal lands for climate change adaptation strategies in the view of increased storminess and projected sea level rise. 相似文献
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Mating behaviour and mating patterns are affected to a large extent by body size in both hermaphrodites and gonochorists.
Detailed research on mating patterns, mate choice, pre- and post-copulatory sexual selection in marine pulmonates is wanting,
thus warranting more attention as a study system in the future. The simultaneous hermaphroditic limpet Siphonaria capensis (Pulmonata: Basommatophora) shows size-dependent fecundity, and acts as a suitable organism to test the effects of body size
on mating patterns, mating success, gender expression and reciprocity in hermaphroditic marine gastropods. We mainly used
bootstrap resampling techniques to estimate the effects of different factors on mating patterns. In the populations studied,
a strong size-assortative mating pattern was observed, where small-scale spatial distribution of potential mating partners
(the mate availability hypothesis) could explain 65% of this pattern, while mate choice and mating constraints explaining
the rest. No significant difference in mating success between limpets with different body size was found, even though in one
population, the sperm recipients were larger than the non-copulating limpets. Interestingly, we found that intromission was
non-reciprocal during copulations. This may mean that this species does not conform to the common rule of reciprocity predicted
for hermaphrodites, unless there is sex-role alternation between individuals in a mating pair. The mating partners consisted
of similar sized, acting males and females, thus without any indication of the body size determining the gender expression.
The matings took place in early mornings only at spring tides and the animals were observed laying egg masses only during
neap tides. Since siphonariid limpets possess both a spermatheca and a seminal vesicle, which may have either a sperm storing
and/or digestive function, post-copulatory sexual selection (e.g., sperm competition) cannot be dismissed. 相似文献
69.
Fission track technique has been used for uranium estimation in drinking water samples collected from some areas of Amritsar District, Punjab, India. The uranium concentration in water samples is found to vary from 3.19 to 45.59 microg l(-1). Some of the physico-chemical properties such as pH, conductance and hardness and the content of calcium, magnesium, total dissolved solids (TDS), sodium, potassium, chloride, nitrate and heavy metals viz. zinc, cadmium, lead and copper have been determined in water samples. An attempt has been made to correlate uranium concentration with these water quality parameters. A positive correlation of conductance, nitrate, chloride, sodium, potassium, magnesium, TDS, calcium and hardness with uranium concentration has been observed. However, no correlation has been observed between the concentration of uranium and the heavy metals analysed. 相似文献
70.
Payel Maity Sujaya De Amitava Pal 《International journal of occupational safety and ergonomics》2016,22(2):257-266
This study aimed to evaluate musculoskeletal disorders (MSDs) and postural stress among female craftworkers. The study was carried out on 75 adult female craftworkers in different districts of West Bengal. The prevalence of MSDs, body part discomfort (BPD) rating and body joint angles of the workers were evaluated with standard methods. Electromyography (EMG) of the shoulder and back muscles was recorded with the BIOPAC system. The prevalence of MSDs, BPD rating and deviation of joint angle were comparatively lower in the case of sitting on the floor with folded legs than squatting and sitting on the floor with stretched legs postures. The EMG and rms values of the shoulder and back muscles were comparatively lower in this posture. Therefore, it was concluded that sitting on the floor with folded legs was less hazardous and it imposed less postural stress in comparison to other sitting postures. 相似文献