全文获取类型
收费全文 | 2682篇 |
免费 | 17篇 |
国内免费 | 33篇 |
专业分类
安全科学 | 76篇 |
废物处理 | 137篇 |
环保管理 | 268篇 |
综合类 | 480篇 |
基础理论 | 546篇 |
环境理论 | 2篇 |
污染及防治 | 784篇 |
评价与监测 | 239篇 |
社会与环境 | 180篇 |
灾害及防治 | 20篇 |
出版年
2023年 | 30篇 |
2022年 | 85篇 |
2021年 | 103篇 |
2020年 | 51篇 |
2019年 | 41篇 |
2018年 | 97篇 |
2017年 | 100篇 |
2016年 | 120篇 |
2015年 | 70篇 |
2014年 | 113篇 |
2013年 | 165篇 |
2012年 | 126篇 |
2011年 | 161篇 |
2010年 | 113篇 |
2009年 | 104篇 |
2008年 | 116篇 |
2007年 | 109篇 |
2006年 | 75篇 |
2005年 | 115篇 |
2004年 | 155篇 |
2003年 | 149篇 |
2002年 | 96篇 |
2001年 | 76篇 |
2000年 | 33篇 |
1999年 | 35篇 |
1998年 | 14篇 |
1997年 | 26篇 |
1996年 | 18篇 |
1995年 | 23篇 |
1994年 | 18篇 |
1993年 | 8篇 |
1992年 | 12篇 |
1991年 | 16篇 |
1990年 | 9篇 |
1989年 | 11篇 |
1988年 | 5篇 |
1987年 | 10篇 |
1986年 | 8篇 |
1985年 | 10篇 |
1984年 | 10篇 |
1983年 | 11篇 |
1982年 | 5篇 |
1981年 | 7篇 |
1979年 | 8篇 |
1977年 | 3篇 |
1975年 | 3篇 |
1970年 | 3篇 |
1966年 | 3篇 |
1964年 | 4篇 |
1961年 | 3篇 |
排序方式: 共有2732条查询结果,搜索用时 0 毫秒
21.
Sustainable product development is closely related to sustainable consumption. The understanding of consumers' purchase, use and discard behaviours may facilitate the identification of requirements to guide manufacturers in the development of sustainable goods and services. The aim of this paper is to investigate consumers' perception about factors that motivate or discourage the consumption of sustainable products to identify demands and convert them into requirements. South Brazilian green and traditional consumers were asked to complete an exploratory qualitative questionnaire. Their answers were organized and compared to identify differences and similarities between the demands of these two groups. Furthermore, demands were converted into requirements for packages, products, manufactures, stores planning and discard systems. The interpretation of factors that motivate or discourage the purchase of sustainable products given by interviewees led to the creation of a list of possible public policies or programmes, aiming to support sustainable consumption. The results demonstrate the necessity of further quantitative investigation between consumer groups, for validation purposes. 相似文献
22.
Germano L. D. Leite Paula D. de Paulo José C. Zanuncio Anarelly C. Alvarenga Luan R. Dourado 《Journal of environmental science and health. Part. B》2017,52(1):70-76
Selective agrochemicals including herbicides that do not affect non-target organisms such as natural enemies are important in the integrated pest management (IPM) programs. The aim of this study was to evaluate the herbicide toxicity, selectivity and hormesis of nicosulfuron, recommended for the corn Zea mays L. (Poaceae) crop, on 10 Trichogrammatidae (Hymenoptera) species. A female of each Trichogramma spp. or Trichogrammatoidea annulata De Santis, 1972 was individually placed in plastic test tubes (no choice) with a cardboard containing 45 flour moth Anagasta ( = Ephestia) kuehniella Zeller, 1879 (Lepidoptera: Pyralidae) eggs. Parasitism by these natural enemies was allowed for 48 h and the cardboards were sprayed with the herbicide nicosulfuron at 1.50 L.ha?1, along with the control (only distilled water). Nicosulfuron reduced the emergence rate of Trichogramma bruni Nagaraja, 1983 females, but increased that of Trichogramma pretiosum Riley, 1879, Trichogramma acacioi Brun, Moraes and Smith, 1984 and T. annulata females. Conversely, this herbicide increased the emergence rate of Trichogramma brasiliensis Ashmead, 1904, T. bruni, Trichogramma galloi Zucchi, 1988 and Trichogramma soaresi Nagaraja, 1983 males and decreased those of T. acacioi, Trichogramma atopovilia Oatman and Platner, 1983 and T. pretiosum males. In addition, nicosulfuron reduced the sex ratio of T. galloi, Trichogramma bennetti Nagaraja and Nagarkatti, 1973 and T. pretiosum and increased that of T. acacioi, T. bruni, T. annulata, Trichogramma demoraesi Nagaraja, 1983, T. soaresi and T. brasiliensis. The herbicide nicosulfuron was “harmless” (class 1, <30% reduction) for females and the sex ratio of all Trichogrammatidae species based on the International Organization for Biological Control (IOBC) classification. The possible hormesis effect of nicosulfuron on Trichogrammatidae species and on the bacterium Wolbachia sp. (Rickettsiales: Rickettsiaceae) was also discussed. 相似文献
23.
Victor E. Balderas-Hernández José T. Ornelas-Salas Ana P. Barba de la Rosa 《Journal of environmental science and health. Part. B》2020,55(2):148-154
AbstractThe presence of diethyl-phthalate (DEP), dibutyl-phthalate (DBP), butylbenzyl-phthalate (BBP), diethylhexyl-phthalate (DEHP) and diisononyl-phthalate (DINP) was determined in 295 tequila samples. They were grouped by age of maturation (white, aged, extra aged or ultra aged) and year of production (between 2013 and 2018). Gas Chromatography coupled with Mass Spectrometry was used for identification and quantification. The results showed that 65 samples (22% of the total) were phthalate free. DEP (0.13-0.27?mg/kg), BBP (0.05–2.91?mg/kg) and DINP (1.64–3.43?mg/kg) were detected in 11 (3.73%), 37 (12.54%) and 5 (1.69%) samples, respectively. But, these concentrations did not exceed the maximum permitted limits (MPL) of phthalates for alcoholic beverages. DBP (0.01–2.20?mg/kg) and DEHP (0.03–4.64?mg/kg) were detected in 96 (32.54%) and 224 (75.93%) samples, from them only 10 (3.39%) and 15 (5.08%) samples, respectively, exceeded the MPL for alcoholic beverages and they were few tequilas produced in the year 2014 or before. DEHP was the most frequent phthalate found in tequila and observed DEHP concentrations were 2-times higher in ultra aged tequilas compared to those in white tequilas. We concluded that all tequilas produced in 2015 and after, satisfied the international standards for these compounds. 相似文献
24.
Ilton Curty Leal Junior Márcio de Almeida D'Agosto 《Journal of Cleaner Production》2011,19(2-3):229-240
Performance evaluation is important in managing freight transport. The transport of certain products, especially those that are hazardous, can have significant financial and socio-environmental impacts. This article presents an application of the modal choice method (MCM) to establish an order of priority among the alternatives considered to carry a determined hazardous product. After a research of the literature on the concepts and development of the proposed method, we consulted experts about their experiences and knowledge, to determine a set of relevant attributes for the evaluation process. We then applied this method to the specific case of the Brazilian bio-ethanol industry, to demonstrate the potential of using the MCM as a tool to support make decisions. We can conclude that highway transport, though the most often used, is not the best compared to trains or pipelines (or combinations of any of the three) from a socio-environmental standpoint. Alternatives with longer pipeline segments are the most suitable to replace the current practice in environmental terms. 相似文献
25.
26.
de la Flor María Patricia Camarillo Rafael Martínez Fabiola Jiménez Carlos Quiles Rafael Rincón Jesusa 《Environmental science and pollution research international》2021,28(19):23720-23730
Environmental Science and Pollution Research - For the photocatalytic degradation of antioxidant 2,6-di-tert-butyl-hydroxytoluene (BHT), several TiO2-based composites have been prepared in MWCNT... 相似文献
27.
Alves Helton José Gasparrini Lázaro José Silva Felipe Eduardo Bueno Caciano Laressa de Muniz Graciela Ines Bolzon Ballester Eduardo Luis Cupertino Cremonez Paulo André Arantes Mabel Karina 《Environmental science and pollution research international》2021,28(9):10977-10987
Environmental Science and Pollution Research - This work describes the production/characterization of low molar mass chitosan nanoparticles derived from waste shrimp shells (SSC), as well as from a... 相似文献
28.
Pereira Andressa Rezende Paranhos Aline Gomes de Oliveira de Aquino Sérgio Francisco Silva Silvana de Queiroz 《Environmental science and pollution research international》2021,28(21):26380-26403
Environmental Science and Pollution Research - Animal breeding for meat production based on swine, cattle, poultry, and aquaculture is an activity that generates several impacts on the environment,... 相似文献
29.
Carvalho Geila S. Oliveira Jakeline R. Vasques Isabela C. F. Santana Monna Lysa T. Justi Marina Job Marcel T. P. de Lima Francielle R. D. Marques João José 《Environmental science and pollution research international》2021,28(35):48427-48437
Environmental Science and Pollution Research - Potentially toxic elements (PTEs) are of great concern in steel mill wastes. Therefore, in order to use them as potential fertilizers in soil, risk... 相似文献
30.
Host selection and infection strategies of parasitoids often correlate with high parental investment and low numbers of progeny.
In this study, we investigate how additional internal mechanisms might shape brood size and fitness of the offspring. Emblemasoma auditrix is a parasitoid fly in which about 38 larvae hatch simultaneously in utero. After host location, a single larva is deposited
into the host, where it rapidly develops and pupates after about 5 days. The search for hosts can take several weeks, and
during that time, the larvae arrest their development and remain in the first larval instar. Nevertheless, the larvae increase
in weight within the uterus, and this growth correlates to a decrease in the number of larvae, although no larvae are deposited.
Thus, our data indicate a first case of prenatal cannibalism in an invertebrate with larvae feeding on each other within the
uterus of the adult. 相似文献