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11.
Sven Scheil Guido Baumgarten Bernhard Reiter Stefan Schwartz Jan Oliver Wagner Stefan Trapp Michael Matthies 《Environmental science and pollution research international》1995,2(4):238-241
The model system CemoS1 (Chemical Exposure Model System) was developed for the exposure prediction of hazardous chemicals released to the environment.
Eight different models were implemented involving chemicals fate simulation in air, water, soil and plants after continuous
or single emissions from point and diffuse sources. Scenario studies are supported by a substance and an environmental data
base. All input data are checked on their plausibility. Substance and environmental process estimation functions facilitate
generic model calculations. CemoS is implemented in a modular structure using object-oriented programming.
e-mail: cemos@aphrodite.mathematik.uni-osnabrueck.de 相似文献
12.
Response patterns in adult forest trees to chronic ozone stress: identification of variations and consistencies 总被引:1,自引:0,他引:1
Nunn AJ Reiter IM Häberle KH Langebartels C Bahnweg G Pretzsch H Sandermann H Matyssek R 《Environmental pollution (Barking, Essex : 1987)》2005,136(3):365-369
The responsiveness of adult beech and spruce trees to chronic O(3) stress was studied at a free-air O(3) exposure experiment in Freising/Germany. Over three growing seasons, gas exchange characteristics, biochemical parameters, macroscopic O(3) injury and the phenology of leaf organs were investigated, along with assessments of branch and stem growth as indications of tree performance. To assess response pattern to chronic O(3) stress in adult forest trees, we introduce a new evaluation approach, which provides a comprehensive, readily accomplishable overview across several tree-internal scaling levels, different canopy regions and growing seasons. This new approach, based on a three-grade colour coding, combines statistical analysis and the proficient ability of the "human eye" in pattern recognition. 相似文献
13.
Light,timing of biological rhythms,and chronodisruption in man 总被引:3,自引:2,他引:3
This paper reviews abundant evidence suggesting that causes and course of aging and cancers can be considered as being both light- and rhythm-related. We define chronodisruption as a relevant disturbance of orderly biological rhythms over days and seasons and years in man. Light is the primary external mediator and melatonin a primary internal intermediary of such disturbances, which can result in earlier deaths via premature aging and cancers. We conclude that experimental and epidemiological research can provide further insights into common denominators of these chronic processes and may offer novel and uniform targets for prevention. 相似文献
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The dilemma of chromosomal mosaicism in chorionic villus sampling—‘direct’ versus long-term cultures
R. Nisani Dr J. Chemke R. Voss Z. Appelman B. Caspi A. Lewin H. Dar A. Reiter 《黑龙江环境通报》1989,9(4):223-226
Chromosomal mosaicism is one of several unanswered dilemmas in first-trimester prenatal diagnosis. We report the course of a pregnancy in which a normal karyotype was detected on direct CVS preparation and fetal blood, 100 per cent trisomy 21 in one long-term CVS culture, and low-rate trisomy 21 mosaicism in a second long-term CVS culture and amniocentesis. The phenotypically normal infant had a 6 per cent mosaicism of trisomy 21. It appears that a persistent low-rate mosaicism in different tissues may be indicative of the true status of the fetus. 相似文献
19.
<Emphasis Type="Bold">Chronodisruption and cancer</Emphasis> 总被引:1,自引:0,他引:1
Research into health effects of chronodisruption (CD), a relevant disturbance of the circadian organization of physiology, endocrinology, metabolism and behaviour, is evolving at a rapid pace. With regard to malignancies, our synthesis of key experiments indicates that CD can play a causal role for cancer growth and tumor progression in animals. Moreover, our meta-analyses of 30 epidemiological studies evince that flight personnel and shift workers exposed to chronodisruption may have increased breast and prostate cancer risks: summary relative risks (RRs) for investigations of flight personnel and of shift workers suggested a 70 and 40% increase in the risk of breast cancer, respectively, and excess relative risks of prostate cancer in nine studies in flight personnel (40%) and in two studies in male shift workers. There was a remarkable indication of homogeneity of results from the individual studies that contribute to the average statistics. However, in view of doubts about whether the differing assessments of CD can really be regarded as valid reflections of the same causative phenomenon and the lack of control of covariates in the majority of studies, it is premature to conclude that the risk observations reflect a real, rather than spurious, association with CD. The challenge for future epidemiological investigations of the biologically plausible links between chronodisruption and human cancers is to conduct studies which appreciate details of transmeridian travelling, of shift work and of covariates for the development of the diseases. 相似文献
20.
Harald G. Zechmeister Stefan Dullinger Gunda Koellensperger Siegrun Ertl Christian Lettner Karl Reiter 《Environmental science and pollution research international》2011,18(1):91-98