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311.
312.
Daniel L. Leedy Carl D. Monk J. G. Warren Viessman Jr. Harold D. Foster EL James R. Brindell John B. Williams Paul E. Miller Harley J. Speir Richard McLean James Uphoff Worrall R. Carter Mark M. Bundy R. Steven Early SCW Eugene Meyer Y. J. Kim Charles Grigalauski Laurence Steinman Mohan K. Wali 《Environmental management》1982,6(1):73-86
313.
Deborah Ulinski Potter Judy L. Meyer 《Journal of the American Water Resources Association》1982,18(4):635-642
ABSTRACT: Zooplankton colonization was followed for 16 months in Lake Oconee, Georgia, a new pumped storage reservoir. Data were interpreted to identify differences among stations and seasons, as a function of the reservoir's early stage of development and of pumped storage operations. Colonization was rapid, and the zooplankton community was characterized by a high species diversity; approximately 40 rotifer species and 14 cladoceran genera were recorded. Zooplankton density varied along an environmental gradient from riverine to lentic conditions. Rotifer abundance varied from 104-106 individuals/m3, with maxima in the summers Copepod and cladoceran densities ranged from 103 to nearly 105 individuals/m3; maxima for stations other than the dam were observed in the summer and early fall, but high values at the dam station occurred throughout winter 1980. When pumped storage operations began in December 1979, zooplankton densities increased at the dam station. Pumpback decreased the intensity of the environmental gradient from riverine to lentic conditions, and led to a more similar zooplankton community structure throughout the reservoir. 相似文献
314.
Pesticides are synthetic chemicals used not only for improving food and feed production but also for the protection of materials and of human health and well-being. Some of these substances are suspected for adverse effects attributable to an interaction with the endocrine system of vertebrates by mimicking or inhibiting endogenous hormones. One of the biological targets important in this relation is the androgen receptor (AR). To be able to screen environmental samples for the presence of compounds which might interfere with androgen action, we aimed to develop a receptor assay based on recombinant human AR (rhAR). We herein describe an rhAR assay in which the receptor is immobilized in microtiter plates via a specific antibody. The assay can be used for high throughput screening of chemicals spread into the environment. 29 of the most recommended pesticides of the Federal Country Hessen, Germany, were tested for their ability to displace [3H]-DHT bound to the rhAR. This evaluation included the major part of the most common herbicides, insecticides and fungicides and covered three potential groups of endocrine disrupting chemicals. For 28 of the substances evaluated, the relative binding affinity to the rhAR was below 0.1% when compared to dihydrotestosterone (DHT) (100%), only fentinacetate exhibited an affinity of 1.42%. An exchange assay indicated that the binding inhibition was reversible. In consequence, fentinacetate seems to be a hormonally active substance which may be present in vegetables or fish, but also on clothing. We conclude that further investigations on this compound and its metabolites are necessary. 相似文献
315.
Meyer MA 《Disasters》1984,8(4):302-306
This paper examines the various legal constraints upon action by relief workers when faced with violations of human rights or of humanitarian law. The unique status of the International Committee of the Red Cross (ICRC) and its delegates is explained and contrasted with the position of relief organizations and their personnel under the Geneva Conventions 1949 and their Additional Protocol I 1977. Proposals are made for the establishment of guidelines for action by relief workers when confronted with atrocities and for the training of relief workers in the relevant laws and procedures. 相似文献
316.
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318.
The Science of Nature - 相似文献
319.
B. Eiben M. Unger G. Stoltenberg G. Rutt R. Goebel A. Meyer U. Gamerdinger W. Hammans S. Hansen H. Hauss M. Vogel G. Schwanitz 《黑龙江环境通报》1992,12(11):945-950
The case of monosomy 18/ring chromosome 18 mosaicism which was detected prenatally by amniocentesis is presented. The pregnancy was terminated in week 18. Autopsy showed complex malformation of the fetus consisting of cebocephaly, hypotelorism, microphthalmia, severe defects of brain development, and arrest of placental maturation. 相似文献
320.
This work has been supported by a NATO Research Grant and by the Fonds der Chemischen Industrie. 相似文献