摘要:

AbstractThe increasing of chemical products and chemical processes in the last years required new concepts for chemical safety. This new laws and governmental regulations based on the knowledge of the chemical, physical and toxicological properties of substances. In the field of safetycodes the chemical toxicology takes a leading part. The risk assessment includes knowledge about chemical reactivity, biotransformation, decomposition and accumulation in the biosphere and the migration of chemicals in water, air and/or soils. Knowledge about the behaviour of chemicals in the biosphere are necessarily for the replacement of toxic chemicals by nontoxic substances demanded by law of poisons or for the waste management. Some topics about the interdependence of progress of chemical toxicology and more chemical safety by laws are discussed.

ISSN:0044-2402    

DOI:10.1002/zfch.19890290702

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1989

数据来源: WILEY

摘要:

AbstractThe world‐wide increase of production and application of chemicals and the question, connected with it, of protection of the environment in case of damages, disposal of wastes and sewages without any harm as well as of the minimization of the risk make necessary to find out ecochemical and ecotoxicological datas which allow a corresponding evaluation of the environment behaviour.Possibilities are offered by terrestrial and aquatic model micro‐ecosystems which render possible to simulate chemical, physical, and biological processes of the natural environment with satisfactory reproducibility. A review is given on possibilities and lim

ISSN:0044-2402    

DOI:10.1002/zfch.19890290703

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1989

数据来源: WILEY

摘要:

Abstract2,4‐Diamino‐1,3,5‐triazines are widely applied as herbicides. These compounds are very stable which leads to a accumulation in soil and plants. To detect this group of compounds chromatographic methods (gas chromatography, HPLC, TLC) were employed in the past. The present work was done with the aim to determine electrochemically triazines in flowing systems like HPLC and FIA. Therefore the polarographic and voltammetric behaviour of these compounds was investigated. A sensitive detection was possible on a mercury electrode in the cathodic range and on a glassy carbon electrode pretreated by galvanostatic pulses in the anodic range. The sensitivity can be improved by photochemical derivatization of the triazines in 6‐position to create phenol‐like compounds. The photochemical response of simazine, prometryne, atrazine and ametryne depends on the substitutes in 2‐ and 4‐position and also in 6‐position. The degree of the photochemical conversion was measured with an amperometric detector in

ISSN:0044-2402    

DOI:10.1002/zfch.19890290704

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1989

数据来源: WILEY

摘要:

AbstractMany of the about 10,000 succulents are cultivated in Botanical Gardens or amateur collections. Some of them are poisonous plants anl may cause health injuries by careless handling or misuse. Several succulents are used as medicinal, narcotic, or magic plants in their habitats, others are applied for fishing or making poisonous arrows for hunting. Poisoning of livestock may happen due to feeding of special succulents, too. This review mainly describes cyanogenic glycosides of the genus Adenia, glucosinolates in some Moringa species, and phenethylamines of the Cactaceae. As to await, further investigations in this field will get increasing importance, especially for the development of new drugs.

ISSN:0044-2402    

DOI:10.1002/zfch.19890290705

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1989

数据来源: WILEY

ISSN:0044-2402    

DOI:10.1002/zfch.19890290706

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1989

数据来源: WILEY

ISSN:0044-2402    

DOI:10.1002/zfch.19890290707

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1989

数据来源: WILEY

ISSN:0044-2402    

DOI:10.1002/zfch.19890290708

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1989

数据来源: WILEY

ISSN:0044-2402    

DOI:10.1002/zfch.19890290709

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1989

数据来源: WILEY

ISSN:0044-2402    

DOI:10.1002/zfch.19890290710

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1989

数据来源: WILEY

ISSN:0044-2402    

DOI:10.1002/zfch.19890290711

出版商:Wiley‐VCH Verlag GmbH&Co. KGaA    

年代:1989

数据来源: WILEY