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121.
P. O. Warner L. Stevens 《Journal of the Air & Waste Management Association (1995)》2013,63(9):769-771
Data have been collected to indicate the presence of a number of biologically antagonistic air contaminants in ambient air in the immediate vicinity of Chattanooga, Tenn., as a result of the operation of the Volunteer Army Ammunition Plant, Tyner, Tenn. It follows, therefore, from these data that adverse health effects observed in the course of the Chattanooga School Children Study may be accounted for either totally or in part by the presence of epidemiologically interfering compounds such as sulfuric and nitric acid vapors which were not measured in air at the time of the health effects study. It is suggested that the presence of these interferences be considered detrimental to the formulation of a valid air quality standard for nitrogen dioxide. 相似文献
122.
Fall-related traumatic brain injury deaths and hospitalizations among older adults--United States, 2005 总被引:1,自引:0,他引:1
PROBLEM: Among older adults, both unintentional falls and traumatic brain injuries (TBI) result in significant morbidity and mortality; however, only limited national data on fall-related TBI are available. METHOD: To examine the relationship between older adult falls and TBI deaths and hospitalizations, CDC analyzed 2005 data from the National Center for Health Statistics' National Vital Statistics System and the Agency for Healthcare Research and Quality's Nationwide Inpatient Sample. RESULTS: In 2005, among adults>or=65 years, there were 7946 fall-related TBI deaths and an estimated 56,423 hospitalizations for nonfatal fall-related TBI in the United States. Fall-related TBI accounted for 50.3% of unintentional fall deaths and 8.0% of nonfatal fall-related hospitalizations. SUMMARY: These findings underscore the need for greater dissemination and implementation of evidence-based fall prevention interventions. 相似文献
123.
Koski Tuuli-Marjaana Lindstedt Carita Klemola Tero Troscianko Jolyon Mäntylä Elina Tyystjärvi Esa Stevens Martin Helander Marjo Laaksonen Toni 《Behavioral ecology and sociobiology》2017,71(6):1-11
Behavioral Ecology and Sociobiology - An individual’s metabolic competence is important when escalating to costly behaviours in agonistic encounters. The use of broken shells in the wild... 相似文献
124.
No apparent genetic basis to demographic differences in scarid fishes across continental shelf of the Great Barrier Reef 总被引:5,自引:2,他引:3
Two species of parrot fish, Scarus frenatus and Chlorurus sordidus, are known to exhibit demographic and life-history differences across the continental shelf of the northern Great Barrier
Reef (GBR). DNA sequences from the mitochondrial (mt) control region were analysed to determine whether there were genetic
differences between the populations from the mid- and outer-shelf reefs. Analysis of molecular variance (AMOVA) indicated
high levels of gene exchange for both species at a local scale between reefs on mid- and outer continental shelf positions
(20 km apart) and at a broader scale along the length of the GBR province (>1000 km apart). There was no evidence to suggest
that local differences in scarid life-history characteristics on the northern GBR have a genetic basis. Rather it appears
more likely that phenotypically plastic responses to prevailing social and environmental conditions explain differences in
the life-history characteristics of both taxa. However, analysis of genetic variation and historical demography revealed striking
differences between the two species. S. frenatus haplotypes differed from one another at relatively few nucleotide sites (mean = 3.30), and the pairwise mismatch distribution
suggested this species has undergone a population expansion within the limit of the resolution of the marker. C. sordidus haplotypes, however, differed from one another at a number of sites (mean = 7.67). Mismatch distribution analysis suggested
that the population size of this species has remained at equilibrium over time. These patterns could also reflect differences
in the metapopulation sizes or generation times between taxa. Some of the implications for fisheries management are discussed.
Received: 28 January 2000 / Accepted: 9 July 2000 相似文献
125.
Tomás Escudero Michael Lee John Stevens Mireia Sandalinas Santiago Munné 《黑龙江环境通报》2001,21(9):760-766
Inversions are structural chromosome abnormalities that may be associated with infertility, multiple miscarriage and chromosomally unbalanced offspring. Preimplantation genetic diagnosis (PGD) with subtelomeric probes was used to select for transfer only those embryos that were normal or balanced for three pericentric inversions. In contrast to previous protocols the present procedure allows the detection of unbalanced embryos that might arise from U-recombination in the inverted region. Additionally, aneuploidy screening was carried out in two cases by a second round of fluorescent in situ hybridization (FISH) with centromeric probes. Of the three couples that underwent the procedure one became pregnant twice. The first pregnancy delivered a healthy and chromosomally normal baby and the second pregnancy is ongoing with triplets. Copyright © 2001 John Wiley & Sons, Ltd. 相似文献
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Two organic compounds, diethylstilboestrol a synthetic oestrogen substitute, and cyproheptadine which acts as an appetite stimulant in some mammals, were added separately at 3 different concentrations to diets fed to plaice (Pleuronectes platessa), and their effect on growth examined. Over a 10 week period, low orally-administered diethylstilboestrol (600 g/kg moist diet) gave rise to increased weight gain, food consumption and food conversion. Higher dietary concentrations of diethylstilboestrol (up to 2400 g/kg diet) were without effect on these parameters. Cyproheptadine did not stimulate appetite, weight gain or food conversion at any of the levels tested.With an Appendix on Statistics by J. A. Pope and A. M. Shanks 相似文献
129.
The coastal zone between Guilderton and Kalbarri, north of Perth, Western Australia, is a highly dynamic area of high landscape
and conservation values under increasing development pressures. Intensification of terrestrial and coastal impacts has highlighted
the need to develop a georeferenced data base for land management. The Coastal Assessment and Restoration project aimed to
document the natural resources and coastal developments to the region and to identify & assess threats to the coastal strip
through the creation of GIS datasets. GIS datasets provide a key source of reference information which can be accessed by
a number of stakeholders for future coastal planning and management and provide a basis for developing a risk management assessment
of the coastal zone and a strategy for coastal managers in our climate change future. 相似文献
130.
Angela DiDomenico Raymond W. McGorry Yueng-Hsiang Huang Michael F. Blair 《Safety Science》2010,48(2):166-172
Falls are a leading cause of fatal and nonfatal injuries in the construction trades. This study explored construction workers’ self-reports of postural stability upon standing after working in different postures. One hundred and eighty-nine workers in 10 construction trades provided stability ratings by completing a written questionnaire. Additional data collected included age, gender, years of experience, and rating of overall balance. Construction workers rated their overall balance as high, furthermore, no difference was found between trades or age groups. Significant differences in stability ratings were provided for the various postures. The most commonly used non-erect postures (bent over at waist, squatting, and forward kneeling) resulted in the largest self-reports of instability. Sitting on elevated surface and sitting on level surface resulted in the highest levels of self-reported stability and are recommended when maintaining balance is a concern. Differences associated with construction trade and age were also found, but were thought to be attributed to differences in tasks performed since no differences were found when each posture was analyzed separately. The results suggest that the working posture used to complete a task affects the postural stability upon standing regardless of construction trade and age of worker. Findings may lead to recommendations for redesign of tasks or tools to reduce the use of certain working postures, particularly in high-risk environments such as construction. 相似文献