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排序方式: 共有222条查询结果,搜索用时 15 毫秒
91.
Häring Ivo Fehling-Kaschek Mirjam Miller Natalie Faist Katja Ganter Sebastian Srivastava Kushal Jain Aishvarya Kumar Fischer Georg Fischer Kai Finger Jörg Stolz Alexander Leismann Tobias Hiermaier Stefan Carli Marco Battisti Federica Makri Rodoula Celozzi Giuseppe Belesioti Maria Sfakianakis Evangelos Agrafioti Evita Chalkidou Anastasia Papadakis George Fuggini Clemente Bolletta Fabio Neri Alberto Giunta Guiseppe Scheithauer Hermann Höflinger Fabian Schott Dominik J. Schindelhauer Christian Köhler Sven Linkov Igor 《The Environmentalist》2021,41(2):286-329
Environment Systems and Decisions - Organizational and technical approaches have proven successful in increasing the performance and preventing risks at socio-technical systems at all scales.... 相似文献
92.
Sebastian U. Senger 《Environmental Sciences Europe》1999,11(5):249-251
93.
It has been confirmed that the NOx-concentration in air is highest over industrial areas and that it decreases by more than 75%, parallel to traffic density, over urban areas as related to forested areas. A significant correlation excists between NO2-concentration and the parameters of “traffic density,” followed by “road density” and “number of inhabitants/km2” in urban areas. No positive correlation was found with the number of “registered cars” and the parameters of “land use”. In forested areas, the traffic density correlated with the NO2-concentration, but the correlation was not significant. The other parameters had no positive correlation with NO2-concentration. In forest, urban- and industrial-areas, the NOx-concentration in the air had a fairly constant ratio to traffic density. 相似文献
94.
95.
Sebastian Elgueta Arturo Correa Marco Campo Felipe Gallardo Dimitrios Karpouzas Maria Cristina Diez 《Journal of environmental science and health. Part. B》2017,52(9):651-657
The use of biopurification systems can mitigate the effects of pesticide contamination on farms. The primary aim of this study was to evaluate the effect of pesticide dissipation on microbial communities in a pilot biopurification system. The pesticide dissipation of atrazine, chlorpyrifos and iprodione (35 mg kg?1 active ingredient [a.i.]) and biological activity were determined for 40 days. The microbial communities (bacteria, actinomycetes and fungi) were analyzed using denaturing gradient gel electrophoresis (DGGE). In general, pesticide dissipation was the highest by day 5 and reached 95%. The pesticides did not affect biological activity during the experiment. The structure of the actinomycete and bacterial communities in the rhizosphere was more stable during the evaluation than that in the communities in the control without pesticides. The rhizosphere fungal communities, detected using DGGE, showed small and transitory shifts with time. To conclude, rhizosphere microbial communities were not affected during pesticide dissipation in a pilot biopurification system. 相似文献
96.
97.
98.
Almut Gerhardt Stefanie Schmidt Sebastian Hss 《Environmental pollution (Barking, Essex : 1987)》2002,120(3)
The nematode Caenorhabditis elegans receives increasing attention in sediment ecotoxicology and new toxicity tests with sensitive test parameters are under development. In this study, the motility of C. elegans could be measured for the first time online in sediment, using the Multispecies Freshwater Biomonitor. Whereas single nematodes could not be recorded, groups of 10 nematodes gave typical locomotive signals in different media (water, agar, sediment) with comparable precision and accuracy. The results of this study encourage to develop a new rapid online whole-sediment toxicity test with behaviour as sensitive test parameter. 相似文献
99.
Sebastian Gayler Stefan Trapp Michael Matthies Reiner Schroll Herwart Behrendt 《Environmental science and pollution research international》1995,2(2):98-103
The uptake of terbuthylazine and its medium polar metabolites into maize plants under outdoor conditions is investigated.
For this purpose, a dynamical fate model consisting of soil, plant and air is developed. The model calculations are compared
with experimental results of outdoor lysimeter tests, carried out with14C-labelled herbicide applied to sandy agricultural soil at a single application rate of 890 g/ha. Approximately 0.3 % of the
applied activity remains in all the plants after the vegetation period. The model predicts that about three times that amount
is volatilized from the plants into the air. Activity uptaken from soil and volatilized from plant surface into air is predominately
associated with metabolites. During the whole vegetation period the fraction of unchanged terbuthylazine in the plants is
very small (less than 1 % of the extractable activity). 相似文献
100.
Sebastian U. Senger und Dietrich J. G. Werner 《Umweltwissenschaften und Schadstoff-Forschung》1999,11(5):253-259
Zusammenfassung Eine Zusammenstellung der Ozon-Me?werte der Luftme?stationnetze in Hessen und NRW ergab für die Jahresmittelwerte von 1990–1998
im Durchschnitt eine schwache Abnahme der Ozonkonzentrationen. Dabei lagen die Jahresmittelwerte der Ozonkonzentrationen über
Waldstationen doppelt so hoch wie über Stadtstationen. Die Ozonkonzentrationen verhalten sich im regionalen Vergleich umgekehrt
proportional zur Verkehrsdichte. In der Zahl der überschreitungen der gesetzlich festgelegten Grenzwerte von ≥180 μg Ozon/m3 pro Jahr lagen die Waldstationen mit dem 2–3 fachen Wert über den Stadtstationen. Lediglich die j?hrlichen Maximalwerte der
stündlich gemessenen Ozonwerte n?hern sich einander.
Die hohen Ozonwerte über den Waldstationen stehen im Zusammenhang mit den niedrigen Konzentrationen von NOx. Nachts reduziert
sich das Ozon über den Waldstationen durch Rückreaktion mit vergleichsweise geringen Konzentrationen von NO nur bis ca. 50%,
w?hrend der Ozongehalt über Stadtstationen bis nahe Null absinkt. Dieser Vorgang über den Stadtstationen wird auch durch Photolyse
des in hohen Konzentrationen vorliegenden NO2 und die dadurch erfolgende erh?hte Bildung von Ozon w?hrend des Tages nicht wieder kompensiert.
Für die hier dargestellten Ergebnisse gibt es prinzipiell keine Unterschiede zwischen den Ozonverh?ltnissen in Hessen und
NRW.
相似文献