Molecular systematics of Abelmoschus (Malvaceae) and genetic diversity within the cultivated species of this genus based on nuclear ITS and chloroplast rpL16 sequence data     

Olaf Werner  Mahmoud Magdy  Rosa María Ros 《Genetic Resources and Crop Evolution》2016,63(3):429-445

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The Impact of Soil Heterogeneity on Nitrate Dynamic and Losses in Tile-Drained Arable Fields     

Denise Bednorz  Nadine Tauchnitz  Olaf Christen  Holger Rupp  Ralph Meissner 《Water, air, and soil pollution》2016,227(10):395

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Central European wood species: characterization using old knowledge     

Andrea Klein  Olaf Bockhorn  Konrad Mayer  Michael Grabner 《Journal of Wood Science》2016,62(2):194-202

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Antimicrobial resistance in fecal generic Escherichia coli and Salmonella spp. obtained from Ontario sheep flocks and associations between antimicrobial use and resistance     

Lisa Scott  Paula Menzies  Richard J. Reid-Smith  Brent P. Avery  Scott A. McEwen  Catherine S. Moon  Olaf Berke 《Canadian journal of veterinary research》2012,76(2):109-119

The purpose of this study was to examine the prevalence and patterns of antimicrobial resistance (AMR) in enteric bacteria obtained from Ontario sheep flocks, and associations between antimicrobial use (AMU) and AMR. Forty-nine sheep producers participated for a 1-year interval between 2006 and 2008. Two-hundred and eighty-three pooled fecal samples were collected from the flocks during initial and final visits. Up to 3 isolates of Salmonella spp. and generic E. coli per pooled fecal sample were tested for susceptibility to 15 antimicrobials. Resistance was infrequent among Salmonella (0%, n = 7 isolates) and low among E. coli (13.1%; n = 849) isolates. A small number of isolates were resistant to antimicrobials classified as being of very high importance to human health. Tetracycline resistance was most frequently observed (12.0%). Logistic regression was used to model potential AMU (qualitative and quantitative) risk factors for tetracycline resistance in generic E. coli from final visits. Qualitative analysis indicated that the use of injectable sulfonamides [including trimethoprim-sulfonamide combinations (TMS)] and tetracycline in the feed and water were significantly associated with tetracycline resistance (OR = 2.6, P = 0.01; and OR = 4.8, P ≤ 0.01, respectively). Quantitative analysis also indicated that TMS exposure rate was significantly associated with tetracycline resistance, which varied depending on the exposure rate. The exposure rate of tetracycline in the feed and water was only significant after the removal of one influential flock, warranting further research examining flocks with higher tetracycline exposure rates. Although the prevalence of AMR in participating flocks was relatively low, risk factors for resistance were identified.  相似文献   

Release of plant-available silicon from various silicon-rich amendments into soil solutions and leachates     

Hogan  Brian  McDermott  Frank  Schmidt  Olaf 《Journal of Soils and Sediments》2019,19(3):1272-1285

Journal of Soils and Sediments - This study assessed the efficacy of selected silicon-rich soil amendments in terms of their ability to provide dissolved silicon (Si) to soil solutions during a...  相似文献   

Conjunctival dermoid in two guinea pigs: a case report     

Wappler O  Allgoewer I  Schaeffer EH 《Veterinary ophthalmology》2002,5(3):245-248

Clinical and histologic findings of conjunctival dermoids in two unrelated guinea pigs are described. The dermoids were treated surgically by resection with superficial lamellar keratectomy and corneal epithelial debridement. Histologically the dermis underneath a stratified squamous keratinized and variably pigmented epithelium consisted of multiple hair follicles, with clearly visible arrectores pilorum muscles, sebaceous glands and loose vascularized fatty tissue.  相似文献   

Die Anwendung von Nützlingen im biologischen Pflanzenschutz in Deutschland     

Olaf Zimmermann 《Gesunde Pflanzen》2004,56(6):151-156

Zusammenfassung Die Anwendung von Nutzarthropoden und entomopathogenen Nematoden hat in den letzten Jahren stetig zugenommen. Die Anfänge des biologischen Pflanzenschutzes mit Nützlingen in Deutschland liegen schon einige Jahrzehnte zurück. Im Freiland werden Trichogramma-Schlupfwespen seit über 25 Jahren gegen den Maiszünsler eingesetzt. Der Einsatz von Nützlingen unter Glas geht in die beginnenden 1970er zurück. Seit Anfang der 1980er werden in Deutschland Nützlinge produziert und kommerziell angeboten.Die etwa 60 eingesetzten Nützlinge sind zu mehr als 50% heimische Arten. Die von deutschen Firmen angebotenen nichtheimischen Arten sind nur an das Gewächshausklima angepasst und können dadurch nicht zur Gefahr in heimischen Ökosystemen werden. In Gewächshauskulturen, besonders in Tomaten und Gurken, ist zu fast 100% Pflanzenschutz durch Nützlinge möglich. In anderen Kulturen, wie Zierpflanzen, ist ein integrierter Schutz mit nützlingsschonenden Pflanzenschutzmitteln notwendig. Besonders Imidacloprid und verwandte, systemisch wirkende Pflanzenschutzmittel zeigen starke Nebenwirkungen auf Nützlinge.Der biologische Vorratsschutz mit Nützlingen ist seit über 6 Jahren in der Praxis erfolgreich. Biologische Bekämpfungskonzepte ermöglichen vom Getreidelager bis zum Haushalt einen verbraucherfreundlichen Schutz der Lebensmittel.In 2001 wurde der Verein der Nützlingsanbieter in Deutschland e. V. gegründet, um gemeinsame Interessen der Firmen zu vertreten. Eine Homepage soll als Informationsplattform der interessierten Öffentlichkeit die Möglichkeiten der biologischen Schädlingsbekämpfung mit Nützlingen näher bringen.  相似文献   

Diagnosis of fog fever     

Swarbrick O 《The Veterinary record》2007,160(23):812

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Evaluation of plasma carboxy-terminal cross-linking telopeptide of type I collagen concentration in horses     

Carstanjen B  Hoyle NR  Gabriel A  Hars O  Sandersen C  Amory H  Remy B 《American journal of veterinary research》2004,65(1):104-109

OBJECTIVE: To evaluate a human assay for quantification of carboxy-terminal cross-linking telopeptide of type I collagen (CTX-I), assess the influence of age on plasma CTX-I concentration, investigate the relationship between plasma CTX-I and serum osteocalcin concentrations, and determine whether concentrations of plasma CTX-I or serum osteocalcin fluctuate in circadian manner in horses. HORSES: 75 clinically normal horses. PROCEDURE: Cross-reactivity between equine serum CTX-I and CTX-I antibodies in an automated electrochemiluminescent sandwich antibody assay (ECLIA) was evaluated via a specificity test (ie, dilution test) and recovery calculation. Serum osteocalcin concentration was measured with an equine-specific osteocalcin radioimmunoassay. To analyze diurnal variations in plasma CTX-I and serum osteocalcin concentrations, blood samples were obtained hourly during a 24-hour period. RESULTS: Results of the dilution test indicated good correlation (r > 0.99) between expected serum CTX-I concentrations and measured serum CTX-I concentrations. The calculated CTX-I recovery was 97.6% to 109.9%. Plasma CTX-I and serum osteocalcin concentrations were correlated. Plasma CTX-I concentration was inversely correlated with age of the horse. No significant circadian variations in plasma CTX-I and serum osteocalcin concentrations were detected. CONCLUSIONS AND CLINICAL RELEVANCE: Results suggest that the fully automated CTX-I ECLIA can be used for evaluation of plasma and serum samples from horses and may be a useful tool to monitor bone metabolism changes. Horses in this study did not have notable diurnal fluctuations in serum osteocalcin and plasma CTX-I concentrations.  相似文献   

Welsh TB plans     

Swarbrick O 《The Veterinary record》2008,162(17):564

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