Impact of contaminants bound to suspended particulate matter in the context of flood events   总被引：1，自引：0，他引：1  

Jan Wölz  Michael Fleig  Tobias Schulze  Sibylle Maletz  Urte Lübcke-von Varel  Georg Reifferscheid  Dirk Kühlers  Thomas Braunbeck  Werner Brack  Henner Hollert 《Journal of Soils and Sediments》2010,10(6):1174-1185

Purpose  

The presented study investigated on contamination of suspended particulate matter (SPM) in rivers that was sampled long-term and with higher frequency during a flood event at the river Rhine. It was conducted to determine in vitro biological effects as well as to identify and quantify compound classes and effective contaminants. Research was part of investigation on hazards of contaminants bound to SPM to inundated sites and retention areas that are inundated during flood events.  相似文献   

Agrochemical leaching reduction in biochar-amended tropical soils of Belize     

Gerardo O. Aldana  Charles Hazlerigg  Elisa Lopez-Capel  David Werner 《European Journal of Soil Science》2021,72(3):1243-1255

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Air exchange rate measurements in naturally ventilated dairy buildings using the tracer gas decay method with Kr,compared to CO₂ mass balance and discharge coefficient methods     

Alaa Kiwan  Werner BergMerike Fiedler  Christian AmmonManfred Gläser  Hans-Joachim MüllerReiner Brunsch 《Biosystems Engineering》2013,116(3):286-296

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Einige weitere Ergebnisse zur Borversorgung Thüringer Ackerböden     

Lothar Büchel  Werner Bergmann 《Archives of Agronomy and Soil Science》2013,59(11):1003-1009

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Establishment success in a forest biodiversity and ecosystem functioning experiment in subtropical China (BEF-China)     

Xuefei Yang  Jürgen Bauhus  Sabine Both  Teng Fang  Werner Härdtle  Wenzel Kröber  Keping Ma  Karin Nadrowski  Kequan Pei  Michael Scherer-Lorenzen  Thomas Scholten  Gunnar Seidler  Bernhard Schmid  Goddert von Oheimb  Helge Bruelheide 《European Journal of Forest Research》2013,132(4):593-606

Experimental forest plantations to study biodiversity–ecosystem functioning (BEF) relationships have recently been established in different regions of the world, but subtropical biomes have not been covered so far. Here, we report about the initial survivorship of 26 tree species in the first such experiment in subtropical China. In the context of the joint Sino–German–Swiss Research Unit “BEF-China,” 271 experimental forest plots were established using 24 naturally occurring tree species and two native commercial conifers. Based on the survival inventories carried out in November 2009 and June 2010, the overall survival rate was 87 % after the first 14 months. Generalized mixed-effects models showed that survival rates of seedlings were significantly affected by species richness, the species’ leaf habit (deciduous or evergreen), species identity, planting date, and altitude. In the first survey, seedling establishment success decreased with increasing richness levels, a tendency that disappeared in the second survey after replanting. Though evergreen species performed less well than deciduous species with establishment rates of 84 versus 93 % in the second survey, their planting success exceeded the general expectation for subtropical broad-leaved evergreen species. These results have important implications for establishing mixed-species plantations for diversity conservation and improvement of ecosystem functioning in the Chinese subtropics and elsewhere. Additional costs associated with mixed-species plantations as compared to conventional plantations also demonstrate the potential of upscaling BEF experiments to large-scale afforestation projects.  相似文献   

The importance of follicular stem cells in veterinary medicine in the context of skin tumours     

Grandi F  Firmo BF  Colodel MM  Rocha RM  Werner J  Rocha NS 《Veterinary dermatology》2012,23(1):81-82

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Demonstration of genes encoding virulence and virulence life-style factors in Brachyspira spp. isolates from pigs     

Barth S  Gömmel M  Baljer G  Herbst W 《Veterinary microbiology》2012,155(2-4):438-443

The distribution of many genes encoding virulence and virulence life-style (VL-S) factors in Brachyspira (B.) hyodysenteriae and other Brachyspira species are largely unknown. Their knowledge is essential e.g. for the improvement of diagnostic methods targeting the detection and differentiation of the species. Thus 121 German Brachyspira field isolates from diarrhoeic pigs were characterized down to the species level by restriction fragment length polymorphism analysis of the nox gene and subsequently subjected to polymerase chain reaction detecting VL-S genes for inner (clpX) and outer membrane proteins (OMPs: bhlp16, bhlp17.6, bhlp29.7, bhmp39f, bhmp39h), hemolysins (hlyA/ACP, tlyA), iron metabolism (ftnA, bitC), and aerotolerance (nox). For comparison, B. hyodysenteriae reference strains from the USA (n=7) and Australia (2) were used. Of all genes tested only nox was detected in all isolates. The simultaneous presence of both the tlyA and hlyA/ACP was restricted to the species B. hyodysenteriae. The hlyA infrequently occurred also in weakly hemolytic Brachyspira. Similarly to tlyA and hlyA all B. hyodysenteriae strains contained the ferritin gene ftnA which was also found in two Brachyspira intermedia isolates. OMP encoding genes were present in B. hyodysenteriae field isolates in rates of 0% (bhlp17.6, bhmp39h), 58.1% (bhlp29.7), and 97.3% (bhmp39f). Since the study revealed a high genetic heterogeneity among German B. hyodysenteriae field isolates differentiating them from USA as well as Australian strains, targets for diagnostic PCR were limited to the nox gene (genus specific PCR) as well as to the species specific nox(hyo) gene and the combination of hlyA and tlyA which allow to specifically detect B. hyodysenteriae.  相似文献   

The use of Thymi Herba as feed additive (0.1%, 0.5%, 1.0%) in weanling piglets with assessment of the shedding of haemolysing E. coli and the detection of thymol in the blood plasma     

Hagmüller W  Jugl-Chizzola M  Zitterl-Eglseer K  Gabler C  Spergser J  Chizzola R  Franz C 《Berliner und Münchener tier?rztliche Wochenschrift》2006,119(1-2):50-54

Thymi Herba (Thymus vulgaris, rubbed) was given as feed additive to weanling piglets. 3 concentrations (0.1%, 0.5%, 1%) were tested against a control group. Rectal swabs were collected weekly and were sent in for bacterial testing. The shedding of haemolysing E. coli was evaluated. There was no significant difference in the shedding of haemolysing E. coli between the 4 groups. Neither was there a difference in the distribution of the various serotypes. Thymol was detected in the blood plasma in all thyme groups. The increase in thymol level with greater amounts of thyme herb was significant. Three days after withdrawal of the feed additive no thymol levels were detected. The study results did not reveal any effects on haemolysing E. coli in the gut.  相似文献   

Epilepsy in Irish Wolfhounds     

Casal ML  Munuve RM  Janis MA  Werner P  Henthorn PS 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2006,20(1):131-135

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On the mechanism of action of the fungicide chloroneb     

H. Lyr  P. Werner 《Pesticide biochemistry and physiology》1982,18(1):69-76

Chloroneb (1,4-dichloro-2,5-dimethoxybenzene) is a fungicide with moderate systemic properties and selective activity toward certain fungi (e.g., Phytophthora, Pythium, Botrytis, Mucor). Although the compound is metabolized by some fungi to the toxic oxidation products DCMP (2,5-dichloro-4-methoxyphenol) and DCHQ (2,5-dichlorohydroquinone) the fungitoxic principle is chloroneb per se. It causes a lysis of the inner mitochondrial membrane of sensitive fungi, attacks the nuclear membrane and also other membranes at higher doses. Oxygen consumption by isolated mitochondria slowly decreases, but the respiratory control quotient remains nearly constant. No specific uncoupling activity or inhibition of the respiratory chain could be detected. Chloroneb is bound to the mitochondrial membrane in sensitive organisms, and a good correlation exists between binding capacity, damage to mitochondrial structure and function, and growth inhibitory effects. DCMP has a nearly identical effect, but some additional uncoupling activity whereas DCHQ is different in its mechanism of action. A comparison of a chloroneb-sensitive strain of Mucor mucedo and a resistant strain with respect to the amino acid composition of their mitochondrial membranes demonstrated a significantly diminished content of tyrosine in the resistant strain, which may be associated with the decreased binding capacity for chloroneb. Although the reason for mitochondrial destruction is not yet elucidated, counteracting effects of piperonylbutoxide and α-tocopherol acetate suggest that a radical mechanism may be involved.  相似文献