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排序方式: 共有2062条查询结果,搜索用时 984 毫秒
971.
972.
Theresa M. Marteau Irma Nippert Sue Hall Caroline Limbert Margaret Reid Martin Bobrow Alan Cameron Martina Cornel Mariet van Diem Bernd Eiben Sixto García-Miñaur Janine Goujard Donna Kirwan Karen McIntosh Peter Soothill Corien Verschuuren-Bemelmans Catherine de Vigan Stephen Walkinshaw Lenore Abramsky Frank Louwen Peter Miny Jürgen Horst 《黑龙江环境通报》2002,22(7):562-566
973.
J. L. Rodriguez F. J. Sedano L. O. García-Martín A. Pérez-Camacho J. L. Sánchez 《Marine Biology》1990,106(1):109-111
An energy budget for metamorphosis in oyster spatOstrea edulis L., collected in the Instituto Español de Oceanografía during March–April 1988, was determined. The energy cost of metamorphosis was calculated from measurements of biochemical components which form the principal reserves of energy and which are used significantly during metamorphosis. The results indicated that protein supplied most of the energy inO. edulis spat. The idea that neutral lipids were used selectively as an energy reserve during the metamorphosis of this bivalve marine larvae was questioned. 相似文献
974.
Toan Nguyen Solveig Heide Lucie Guilbaud Stéphanie Valence Saskia Vande Perre Eléonore Blondiaux Boris Keren Geneviève Quenum-Miraillet Jean-Marie Jouannic Laurent Mandelbrot Olivier Picone Agnès Guet Vassilis Tsatsaris Mathieu Milh Nadine Girard Marie Vincent Mathilde Nizon Céline Poirsier Alexandre Vivanti Alexandra Benachi Vincent des Portes Laurent Guibaud Olivier Patat Myrtille Spentchian Lisa Frugère Delphine Héron Catherine Garel 《黑龙江环境通报》2023,43(6):746-755
975.
Jordi Honey-Rosés Daniel W. Schneider Nicholas Brozović 《Environmental management》2014,53(6):1146-1157
Research on ecosystem services has focused mostly on natural areas or remote places, with less attention given to urban ecosystem services and their relationship with technological change. However, recent work by urban ecologists and urban designers has more closely examined and appreciated the opportunities associated with integrating natural and built infrastructures. Nevertheless, a perception remains in the literature on ecosystem services that technology may easily and irreversibly substitute for services previously obtained from ecosystems, especially when the superiority of the engineered system motivated replacement in the first place. We emphasize that the expected tradeoff between natural and manufactured capital is false. Rather, as argued in other contexts, the adoption of new technologies is complementary to ecosystem management. The complementarity of ecosystem services and technology is illustrated with a case study in Barcelona, Spain where the installation of sophisticated water treatment technology increased the value of the ecosystem services found there. Interestingly, the complementarity between natural and built infrastructures may remain even for the very ecosystems that are affected by the technological change. This finding suggests that we can expect the value of ecosystem services to co-evolve with new technologies. Technological innovation can generate new opportunities to harness value from ecosystems, and the engineered structures found in cities may generate more reliance on ecosystem processes, not less. 相似文献
976.
Espinosa-Barrera Paula Andrea Delgado-Vargas Carlos Andrés Martínez-Pachón Diana Moncayo-Lasso Alejandro 《Environmental science and pollution research international》2021,28(19):23984-23994
Environmental Science and Pollution Research - This work deals with the theoretical approach of biodegradability, lipophilicity, and physiological activity of VAL and four degradation products... 相似文献
977.
Toxic wastes, usually found as byproducts of industrial processes originate a constant degradation of the Environment and a complex scientific and technical problem. A Solidification/Inertization technique has been applied to the control of the landfill disposal of steel foundry dust. Based on lixiviation test results are given on possibilities to reduce lead, chromium and cadmium emission to the Environment. 相似文献
978.
Rabassa Mariano J. Conte Grand Mariana García-Witulski Christian M. 《Environmental Economics and Policy Studies》2021,23(1):1-28
Environmental Economics and Policy Studies - Governments throughout the globe usually implement early warning systems to prevent health-related costs from exposure to extreme heat. In a warming... 相似文献
979.
Cristina Gutiérrez Maria T. García Ignacio Gracia Antonio de Lucas Juan F. Rodríguez 《Journal of Material Cycles and Waste Management》2012,14(4):308-316
Polystyrene (PS) is currently used as packaging, insulating and storing material in various industrial or domestic fields. As a result, a large quantity of PS wastes is produced. Plastic wastes are not usually biodegradable, so it is necessary to suggest a technology to recycle them. Landfills and incineration are reasonably cheap methods but are not environmentally acceptable, therefore, alternative methods for polymer recycling are required. The general purpose of PS foam recycling is to recover a more compact polymeric material without degradation. Dissolution with terpenic solvents is presented here as an efficient and cheap alternative that is developed at room temperature; among the oils studied, limonene was selected because of its intermediate solubility and its abundance. The solvent removal is possible thanks to supercritical technology that provides a high solubility in limonene and almost a complete PS insolubility at moderated pressures (77?bar) and low temperatures (30?°C). Thus, based on the results of thermogravimetric and chromatographic analysis, we propose that.supercritical antisolvent precipitation is an ideal technique for carrying out the separation of PS and limonene, providing a recycled polymer with a reduced volume, almost completely free of solvent and without degradation of the polymeric chains. 相似文献
980.
Marta Doval Mi?arro Isabel María Morales Terrés Jose A. Egea Enrique González Ferradás Agustín Mi?ana Aznar 《Environmental monitoring and assessment》2012,184(12):7353-7364
Diffusive samplers were used to measure the vertical concentrations of benzene, toluene, n-hexane, cyclohexane, ethylbenzene and o-, m- and p-xylenes on both sides of two NS-oriented street canyons in Murcia (Spain) during a 5-day period. Non-dimensional relationships of concentration and height were calculated in order to study the behaviour of their concentration vertical profiles. The results show that the vertical profiles of benzene, toluene, n-hexane and cyclohexane concentrations were similar in both streets and on both sides of each street. Some differences were found in vertical profiles between streets and sides for ethylbenzene and xylenes, probably due to their higher affinity for adsorption into building materials. The similarities found for the first set of VOCs suggest that the dynamics of the dispersion was the same for both streets and was mainly influenced by microscale thermal effects. Finally, the concentration measurements of benzene, toluene, n-hexane, cyclohexane, and ethylbenzene were adjusted to expressions in the form c?=?c 0(h/h 0) A , and a regression coefficient R 2?=?0.962 (p?=?0.0000) was obtained. The decreasing concentration of these compounds with height should be taken into account when assessing population exposure to these pollutants. 相似文献