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901.
Sponges of warm- and temperate- but also cold-waters are known to synthesize structurally diverse primary and secondary metabolites.
These compounds fulfill a variety of functions including adaptations of the cell membranes to environmental conditions. We
show here that boreal sponges of the order Halichondrida are rich sources of brominated lipid fatty acids. The comparison
of lipid compositions of halichondrid Demospongiae from boreal and warmer waters indicates an accumulation of brominated fatty
acids in sponges from colder settings. Moreover, the spatial distribution of brominated fatty acids in the sponge tissue of
one widely distributed sponge of the North-East Atlantic (Phakellia ventilabrum) hints to a function related to membrane fluidity and permeability rather than to defense against predation. However, brominated
fatty acids are diagnostic for the presence of bromoperoxidases in sponges and may therefore be potentially useful as markers
in a chemical screening for secondary metabolites of pharmacological interest. 相似文献
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Envirowise — formerly the Environmental Technology Best Practice Programme — is an UK Government Programme designed to help businesses to improve environmental performance and reduce costs. It works closely with industry bodies to prepare a strategic approach to producing and promoting tools that help companies take action to reduce waste at source. By September 2000, the Programme had helped UK companies to save £125 million per year by reducing the use of raw materials and the production of waste. The Programme produces practical advice based on existing practices in industry. As well as producing published information, Envirowise runs a free telephone helpline for UK companies. Envirowise undertakes a considerable amount of marketing to help companies overcome the barriers to action. The Government has set the objectives for the Programme's managing contractors; these are based on the impact of its activities in terms of reduced waste production. 相似文献
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In this paper we argue that organizational identification is predictive of employee interests and concerns during periods of organizational change. More specifically, we assert that organizational identification may largely determine whether employees may be focused upon the change related outcomes (e.g., salary, expenses, etc.), or on the change processes (e.g., procedures, voice and participation options, etc.). Data of both a scenario experiment and a survey are presented indicating that high and low identifiers indeed are differentially interested in process and outcome information. The results suggest that people who identify less with the organization are more likely to be focused upon the change outcomes then on the change process, while people who identify highly (i.e., deep structure) with the organization are more likely to be focused upon the change processes then on the change outcomes. The benefits of awareness of organizational members' level of identification for organizational change management are discussed. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
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The Science of Nature - Kodymirus vagans Chlupá? and Havlí?ek in Sb Geol Ved Paleontol 6:7–20, 1965 is redescribed as an aglaspidid-like arthropod bearing a single pair of... 相似文献
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