Oekologische Chemie Eine Standortbestimmung

SIGLETIB: RA 3193 (820) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Nutzung von photosynthetisch aktiven Zellkulturen zur Stoffproduktion Schlussbericht

Available from TIB Hannover: F93B1429+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman

Einfluesse der Formulierungshilfsstoffe von Pflanzenbehandlungsmitteln auf Boeden

The influence of solvents and surfactants/formulation additives on microbial activity of soils was studied using soil samples from Berlin irrigation fields. The parameters of the microbial activity were dehydrogenase activity (DHA), acid phosphatase activity (SPA) and substrate induced activity (SIR). The solvents ethanol, xylene and petroleum did not show any toxic effects up to concentrations of 1000 mg/kg soil. While the formulation additive Soprophor and the cationic surfactant DSDMAC were only toxic at very high concentrations (1000 mg/kg soil), concentrations as low as 50 mg/kg for nonylphenol and LAS caused an observable damage of the microflora. Marlophen 812 became more toxic with increasing metabolization, i.e. with decomposition of the hydrophilic part of the molecule. The second part of the study was concerned with the influence of the surfactants on the mobility of organic substances, which entered the soil through anthropogenic activity, as well as on soil nutrients and heavy metals. With decreasing water solubility the mobility of the substances was strongly related to the mobilization of organic soil material. Coadsorption of the humic substances with the cationic surfactant DSDMAC reduces the organic carbon content of the soil solution distinctly. This involves increasing mobilization of the examined substances. Anionic surfactants increase mobilization of humic substances and thus, cause higher contents of the pollutants in soil solution. Similar effects occur with the nonionic surfactant NPEO and with SoprophorAlso published as Umweltbundesamt. Texte, v. 28/94SIGLEAvailable from TIB Hannover: RN 8908(93-127) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Umwelt, Naturschutz und Reaktorsicherheit, Bonn (Germany)DEGerman

Neue Duennschichtverfahren durch molecular engineering-Reaktorentwicklung Abschlussbericht

There have been no previous works in the field of constructing a universal reactor for R and D and pilot production purposes. There are numerous publications concerned with the different principles of operation of a CVD reactor. It was the goal of the project to be able to supply potential german users with a thin film CVD reactor that fulfills the demands put forward by the task to transfer results from R and D to production. Intensive discussions with all users of the reactor and simulation of the impact of hardware changes to deposition results helped to minimize the time and effort put into construction and building of the system. A number of problems have been solved during the project having impact on the complete range of products of PLASMOS: Mechanical integration of a module to the MESC compatible cluster handler of an integrator, design and establishment of the electrical and data interfaces of the module with the complete system and development of a professional real time software. This project was PLASMOS' first step in the field multichamber processing using single wafer and load lock. The reactor technique necessary for potential users is now available. Applications can be found in all fields of thin film technologies.(orig.)Available from TIB Hannover: F95B1423+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman

Erprobung von Verfahren zur qualitativen und quantitativen Erfassung von Geruchsstoffen

TIB: RN 8908(86-113) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Gebiete mit erhoehter natuerlicher Radioaktivitaet. T. 5 Radonquellen in Raum Fichtelberg-Neubau. T. 1: Ahornquelle I und II

SIGLETIB: RN 5906(547) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

Minutes of the 8th international symposium 'chemical and toxicological aspects of environmental quality - prospective eco-epidemiology'

Copy held by FIZ Karlsruhe; available from UB/TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Vorprojekt Integriertes Mikroanalysensystem - VIMAS Abschlussbericht

SIGLEAvailable from TIB Hannover: F99B771+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Weiterentwicklung und Optimierung einfacher Oxidationsverfahren zur Aufbereitung organisch belasteter Grund- und Trinkwaesser in den NBL. Teilprojekt A-C Abschlussbericht

At present the use of Advanced Oxidation Processes (AOP) in drinking-water treatment plants is largely investigated. An important point of interest is the metabolism of the degraded substances, to avoid the formation of toxic byproducts. Three variants of the AOP-processes were tested in batchreactors, flow-through-reactors and in a pilot plant (UV/H2O2). Batchreactors were used to determine various reaction parameters. Flow-through reactors were used for testing UV-lamps and for the comparison of the single AOPs. The pilot-plant for the UV/H2O2-process was optimised at a contaminated well. Metabolites were analysed by HPLC, CG/MS and capillary electrophoresis. Detailed degradation pathways of atrazine and isoproturone were obtained. The comparison of the processes showed as a result of the project that each one yields a sufficient degradation of the micropollutant. For the ozone/H2O2-variant the lowest amount of energie was needed. The examinations proved the reliability of AOPs for purification of polluted ground-, drinking-, and surfacewater from micropollutants. As-up-scaling of the ozone/H2O2-process for waterworks should be possible. (orig.)Available from TIB Hannover: F98B1304+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman