全文获取类型
收费全文 | 530篇 |
免费 | 4篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 43篇 |
废物处理 | 27篇 |
环保管理 | 11篇 |
综合类 | 40篇 |
基础理论 | 64篇 |
污染及防治 | 233篇 |
评价与监测 | 87篇 |
社会与环境 | 30篇 |
出版年
2023年 | 7篇 |
2022年 | 15篇 |
2021年 | 19篇 |
2020年 | 6篇 |
2019年 | 26篇 |
2018年 | 20篇 |
2017年 | 34篇 |
2016年 | 47篇 |
2015年 | 12篇 |
2014年 | 41篇 |
2013年 | 102篇 |
2012年 | 17篇 |
2011年 | 34篇 |
2010年 | 12篇 |
2009年 | 13篇 |
2008年 | 21篇 |
2007年 | 17篇 |
2006年 | 11篇 |
2005年 | 14篇 |
2004年 | 15篇 |
2003年 | 20篇 |
2002年 | 9篇 |
2001年 | 4篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1995年 | 3篇 |
1993年 | 2篇 |
1985年 | 1篇 |
1982年 | 1篇 |
1973年 | 1篇 |
1963年 | 1篇 |
1962年 | 1篇 |
1961年 | 2篇 |
1938年 | 1篇 |
排序方式: 共有535条查询结果,搜索用时 437 毫秒
351.
Krystyna Zużewicz Bogusław Biernat Grzegorz Kempa Krzysztof Kwarecki 《International journal of occupational safety and ergonomics》2013,19(3):337-346
AbstractThe objective of the study is to attempt an evaluation of heart rate (HR) and heart rate variability (HRV) regulatory mechanisms in the presence of autonomous nervous system (ANS) components in transient exposure to high altitude hypoxia.During 24 hrs including a stay in hypobaria, the participants had their HR continuously recorded using the Holter method. The following parameters were calculated at rest and during the stay in a thermobarochamber: spectral power in low frequency bands (LF) 0.04-0.15 Hz and high frequency bands (HF) 0.15-0.5 Hz, and the sympathetic-parasympathetic balance index LF/HF.Under hypobaric conditions, a decrease in mean spectral power of R-R intervals was noted within both frequency ranges, compared with the study performed in normobaria. The observed differences were larger at daytime. 相似文献
352.
Zbigniew Witold Engel Maciej Kłaczyński Wiesław Wszołek 《International journal of occupational safety and ergonomics》2013,19(4):367-379
With the present development of digital registration and methods for processing speech it is possible to make effective objective acoustic diagnostics for medical purposes. These methods are useful as all pathologies and diseases of the human vocal tract influence the quality of a patient’s speech signal. Diagnostics of the voice organ can be defined as an unambiguous recognition of the current condition of a specific voice source. Such recognition is based on an evaluation of essential acoustic parameters of the speech signal. This requires creating a vibroacoustic model of selected deformations of Polish speech in relation to specific human larynx diseases. An analysis of speech and parameter mapping in 29-dimensional space is reviewed in this study. Speech parameters were extracted in time, frequency and cepstral (quefrency) domains resulting in diagrams that qualified symptoms and conditions of selected human larynx diseases. The paper presents graphically selected human larynx diseases. 相似文献
353.
Małgorzata Milczarek Andrzej Najmiec 《International journal of occupational safety and ergonomics》2013,19(1):25-33
One of the dimensions treated as part of a company’s safety culture or climate is workers’ attitudes towards risk and safety. In the present study these personal aspects are defined as workers’ safety culture, which is understood as a way of acting focused on life and taking care of one’s health. A questionnaire on safety culture was filled out by 200 employees of a metallurgical enterprise. Factor analysis was used to determine empirical scales of the questionnaire, whereas variance analysis was used to test hypotheses. The results confirmed the hypotheses that people who experienced accidents, dangerous situations, and—to a lesser extent—health problems had a lower level of safety culture. Nevertheless not all of the scales determined during factor analysis turned out to be significant as far as all kinds of those undesirable situations are concerned. Proposals for future studies are formulated in the conclusion. 相似文献
354.
Zofia Pawłowska 《International journal of occupational safety and ergonomics》2013,19(3):284-290
Improvement of occupational safety and health (OSH) management is closely related to the development of OSH performance measurement, which should include OSH outcomes (e.g., occupational accidents), OSH inputs (including working conditions) and OSH-related activities. The indicators used to measure the OSH outcomes are often called lagging indicators, and the indicators of inputs and OSH activities are leading indicators. A study was conducted in 60 companies in order to determine what kinds of indicators were used for OSH performance measurement by companies with different levels of OSH performance. The results reveal that the indicators most commonly used in all of the companies are those related to ensuring compliance with the statutory requirements. At the same time, the leading indicators are much more often adopted in companies with a higher performance level. These companies also much more often monitor on a regular basis the indicators adopted for the evaluation of their OSH performance. 相似文献
355.
Urban air particulate matter (APM) was collected at two sampling sites in the city of Lodz, Poland in March, May and July 2001. The concentrations of several trace elements (TEs) as well as heavy metals were determined by neutron activation analysis (NAA). It was found that for many elements, the contribution of the blank values arising from the filtering material is very high, especially for glass fiber filters. The results obtained for Lodz were compared to those obtained for Milan, Italy. The data of Lodz are, in general, lower than those found in Milan downtown in the winter season. The influence of three coal-fired power plants located within the city of Lodz on the concentration of trace elements in APM was also considered. 相似文献
356.
This report presents the results of PAH, phenol, and selected trace element (Cd, Cu, Hg, Pb, S, and Zn) determinations on detailed soil profiles and associated plant bioindicators (including lichen Hypogymnia physodes, moss Hylocomium splendens, pine Pinus sylvetris) from the three most representative habitats in the Holy Cross Mts, south-central Poland. This study is only part of a larger ongoing environmental study that includes complex sulfur isotope and element determinations in three national parks in N, central and S parts of Poland. The highest concentrations of PAHs (1887 ppb) and numerous trace elements are found in the organic horizon-O and humic horizon-A of each soil type. Different plant species and their individual tissues reveal considerable variability in the concentration of PAHs, phenols and elements examined. Most of the H. physodes thalli also reveal higher concentrations of individual hydrocarbons and some elements (including S and Zn) than their host bark. The highest concentration levels of phenols (1217 ppb) are noted in the 1-year pine needles. Most of the PAHs and elements examined seem to be of anthropogenic origin. The only exception is the distribution pattern of elements in southwestern part of the study area, which is linked to the local bedrock geochemical anomaly. The results of this study indicate that the content of PAHs, Cd, Cu, Hg, Pb, S and Zn in the soils and plant bioindicators examined has not changed considerably since 1998. 相似文献
357.
358.
359.
Anna Parus Małgorzata Gaj Bożena Karbowska Joanna Zembrzuska 《Chemistry and Ecology》2020,36(7):705-725
ABSTRACT Pharmaceutical compounds are considered emerging environmental pollutants that have a potential harmful impact on environment and human health. In this study, the spiky green horse-chestnut shell was used for the biosorption and removal of acetaminophen from aqueous solution. It was analysed how the parameters, like contact time, pH, mass of biosorbent and temperature, influence the effectiveness of acetaminophen removal from aqueous solutions. The equilibrium was quickly achieved after 10?min (~60%). The amount of acetaminophen adsorption slightly increased with the increase of the mass of biosorbent, and for example for an aqueous solution containing 10?mg/L of acetaminophen adsorption was increased from 62% to 81%. The promising results obtained at pH ranged between 2 and 9, which shows that the adsorption of acetaminophen did not depend on the pH and it may be a consequence of the predominant microporous sorbent and its surface charge. The result is better correlated to a pseudo-second-order kinetic model of type 2 (r 2?=?0.9992) than pseudo-first-order. A sorption mechanism of acetaminophen on biosorbent was also proposed. The sorption of acetaminophen over biosorbent is mainly preceded by hydrophilic interactions between hydroxyl and carbonyl groups in pharmaceutical molecules and hydroxyl and carboxyl groups on the surface of biosorbent. 相似文献
360.
The occurrence of zooplankton species, indicating a salinewater influx from the North Sea into the Baltic Sea in 1972, is described. Particular attention is paid to 8 species so far unknown in this region (Ectopleura dumortieri, Rosacea plicata, Tomopteris kefersteini, Aetideus armatus, Centropages typicus, Eucalanus elongatus, Metridia lucens, Electra pilosa). The appearance of these zooplankters in the Southern Baltic Sea is discussed in relation to the hhdrographic changes taking place in this area in 1972. Based on these data, assessments are made regarding the intensity of dynamic exchange processes in the Baltic and North Atlantic waters in 1972. 相似文献