Penile prolapse and urethral obstruction secondary to lymphosarcoma of the penis in a dog     

Michels GM  Knapp DW  David M  Lantz GC  Munjar TA  Blevins WE  DeNicola DB 《Journal of the American Animal Hospital Association》2001,37(5):474-477

A 5-year-old Chihuahua presented for clinical signs of dysuria and penile prolapse. Radiographic studies identified a urethral obstruction distal to the junction of the proximal and middle third of the os penis that appeared to be secondary to swelling of the penis. Penile resection combined with a scrotal urethrostomy was performed. Histopathological examinations of tissue samples of the body of the penis revealed lymphosarcoma. Lymphosarcoma of the penis is a rare finding in all species. It can occur as a primary tumor of the penis in dogs. Penile lymphosarcoma should be considered in the differential diagnosis of dogs affected with penile prolapse and dysuria.  相似文献   

A blinded,randomized, placebo‐controlled,dose determination trial of lokivetmab (ZTS‐00103289), a caninized,anti‐canine IL‐31 monoclonal antibody in client owned dogs with atopic dermatitis          下载免费PDF全文

Gina M. Michels  Deborah S. Ramsey  Kelly F. Walsh  Olivier M. Martinon  Sean P. Mahabir  Jacquelien D. Hoevers  Rodney R. Walters  Steven A. Dunham 《Veterinary dermatology》2016,27(6):478-e129

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Obsidian hydration profiles measured by sputter-induced optical emission     

Tsong IS  Houser CA  Yusef NA  Messier RF  White WB  Michels JW 《Science (New York, N.Y.)》1978,201(4353):339-341

The variation of concentrations of hydrogen, sodium, potassium, lithium, calcium, magnesium, silicon, and aluminum as a function of depth in the hydration layer of obsidian artifacts has been determined by sputter-induced optical emission. The surface hydration is accompanied by dealkalization, and there is a buildup of alkaline earths, calcium and magnesium in the outermost layers. These results have clarified the phenomena underlying the obsidian hydration dating technique.  相似文献   

Use of the APSIM model in long term simulation to support decision making regarding nitrogen management for pearl millet in the Sahel     

P.B. Irénikatché Akponikpè  Bruno Gérard  Karlheinz Michels  Charles Bielders 《European Journal of Agronomy》2010,32(2):144-154

Soil fertility and climate risks are hampering crop production in the Sahelian region. Because experiments with only a few fertility management options on a limited number of sites and years cannot fully capture the complex and highly non-linear soil–climate–crop interactions, crop growth simulation models may suitably complement experimental research to support decision making regarding soil fertility and water management. By means of a long term (23 years) scenario analysis using the Agricultural Production Systems Simulator (APSIM) model, this study investigates millet response to N in view of establishing N recommendations better adapted to subsistence small-holder millet farming in the Sahel. Prior to this, the APSIM model was tested on a rainfed randomized complete block experiment carried out during the 1994 and 1995 cropping seasons, having contrasting rainfall conditions. The experiment combined, at three levels each, the application of cattle manure (300, 900 and 2700 kg ha^?1), millet residue (300, 900 and 2700 kg ha^?1) and mineral fertilizer (unfertilized control, 15 kg N ha^?1 + 4.4 kg P ha^?1 and 45 kg N ha^?1 + 13.1 kg P ha^?1) at ICRISAT Sahelian Center, Niger. The model suitably predicted plant available water PAW and the simulated water and nitrogen stress were in agreement with measurement (water) and expectation (N) regarding the fertilizer and rainfall conditions of the experiment. APSIM simulations were in satisfactory agreement with the observed crop growth except for the highest crop residue application rates (>900 kg ha^?1). For biomass and grain yield, the model performance was relatively good in 1994 but biomass yields were slightly overpredicted in 1995. The model was able to adequately reproduce the average trend of millet grain yield response to N inputs from manure and fertilizer, and to predict the overall observed higher grain yield in 1995 compared to 1994, despite the better rainfall in 1994. The 23-year, long term scenario analysis combining different application rates of cattle manure, millet residue and mineral fertilizer, showed that moderate N application (15 kg N ha^?1) improves both the long term average and the minimum yearly guaranteed yield without increasing inter-annual variability compared to no N input. Although it does imply a lower average yield than at 30 kg N ha^?1, the application of 15 kg N ha^?1 appears more appropriate for small-holder, subsistence farmers than the usual 30 kg N ha^?1 recommendation as it guarantees higher minimum yield in worst years, thereby reducing their vulnerability.  相似文献   

Understanding the adoption of smartphone apps in crop protection     

Michels  Marius  Bonke  Vanessa  Musshoff  Oliver 《Precision Agriculture》2020,21(6):1209-1226

Precision Agriculture - There is a steady increase in smartphone apps available to improve farmers’ decision making with respect to crop protection. While current studies have focused on...  相似文献   

Smartphone adoption and use in agriculture: empirical evidence from Germany     

Michels  Marius  Fecke  Wilm  Feil  Jan-Henning  Musshoff  Oliver  Pigisch  Johanna  Krone  Saskia 《Precision Agriculture》2020,21(2):403-425

Precision Agriculture - Smartphone technology is promising for the future development of agriculture, as it can facilitate and improve many operational procedures and can also be combined with...  相似文献   

Spectral vegetation indices selected for quantifying Russian wheat aphid (Diuraphis noxia) feeding damage in wheat (Triticum aestivum L.)   总被引：2，自引：0，他引：2  

M. Mirik  R. J. Ansley  G. J. Michels Jr.  N. C. Elliott 《Precision Agriculture》2012,13(4):501-516

The effects of insect infestation in agricultural crops are of major economic interest because of increased cost of pest control and reduced final yield. The Russian wheat aphid (RWA: Diuraphis noxia) feeding damage (RWAFD), referred to as ??hot spots??, can be traced, indentified, and isolated from uninfested areas for site specific RWA control using remote sensing techniques. Our objectives were to (1) examine the use of spectral reflectance characteristics and changes in selected spectral vegetation indices to discern infested and uninfested wheat (Triticum aestivum L.) by RWA and (2) quantify the relationship between spectral vegetation indices and RWAFD. The RWA infestations were investigated in irrigated, dryland, and greenhouse growing wheat and spectral reflectance was measured using a field radiometer with nine discrete spectral channels. Paired t test comparisons of percent reflectance made for RWA-infested and uninfested wheat yielded significant differences in the visible and near infrared parts of the spectrum. Values of selected indices were significantly reduced due to RWAFD compared to uninfested wheat. Simple linear regression analyses showed that there were robust relationships between RWAFD and spectral vegetation indices with coefficients of determination (r ²) ranging from 0.62 to 0.90 for irrigated wheat, from 0.50 to 0.87 for dryland wheat, and from 0.84 to 0.87 for the greenhouse experiment. These results indicate that remotely sensed data have high potential to identify and separate ??hot spots?? from uninfested areas for site specific RWA control.  相似文献   

Untersuchungen über den Einfluß der Feuchtigkeit des Bodens auf die Dynamik der leicht löslichen Bodenmanganfraktionen und die Manganaufnahme der Pflanzen     

Karlheinz Beer 《Archives of Agronomy and Soil Science》2013,59(7):657-669

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Solid fraction of separated digestate as soil improver: implications for soil fertility and carbon sequestration     

Egene  Caleb Elijah  Sigurnjak  Ivona  Regelink  Inge C.  Schoumans  Oscar F.  Adani  Fabrizio  Michels  Evi  Sleutel  Steven  Tack  Filip M. G.  Meers  Erik 《Journal of Soils and Sediments》2021,21(2):678-688

Journal of Soils and Sediments - This study investigated the C and N mineralisation potential of solid fractions (SFs) from co-digestated pig manure after P-stripping (P-POOR SF) in comparison with...  相似文献   

A blinded,randomized, placebo‐controlled trial of the safety of lokivetmab (ZTS‐00103289), a caninized anti‐canine IL‐31 monoclonal antibody in client‐owned dogs with atopic dermatitis          下载免费PDF全文

Gina M. Michels  Kelly F. Walsh  Kristina A. Kryda  Sean P. Mahabir  Rodney R. Walters  Jacquelien D. Hoevers  Olivier M. Martinon 《Veterinary dermatology》2016,27(6):505-e136

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