EMBRYONIC GROWTH FACTOR RECEPTORS AND GROWTH FACTOR SECRETION BY CULTURED OVIDUCT EPITHELIAL CELLS IN CATTLE (BOS TAURUS)     

Th.  Høst-Hansen  B. Avery  P. Hyttel  T. Greve 《Reproduction in domestic animals》1993,28(3):193-194

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Sex Determination of Bovine Embryo Biopsies Using in situ Hybridization*     

P.D. Thomsen  M. Schwerin  P.H. Poulsen  B. Avery 《Reproduction in domestic animals》1991,26(2):66-69

A male specific bovine DNA fragment was used as probe to determine the sex of bovine interphase cells by in situ hybridization. This method also proved useful for determining the sex of bovine embryos.  相似文献   

Two Cases of Poisoning in Livestock Presenting Difficulties in Diagnosis          下载免费PDF全文

R. J. Avery  L. Niilo  T. Kramer  A. Johnston    C. le Q. Darcel 《The Canadian veterinary journal. La revue veterinaire canadienne》1961,2(8):301-304

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A Natural Outbreak of Clostridium Botulinum Type C Intoxication In Ranch Mink Arising From Pork Liver   总被引：1，自引：0，他引：1       下载免费PDF全文

R. J. Avery  C. E. Dolman  P. L. Stovell    A. J. Wood 《Canadian journal of veterinary research》1959,23(6):203-209

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Health and production of feedlot cattle following supplementation with urea–molasses in starter pens     

IA Croft  EH Clayton  PMV Cusack 《Australian veterinary journal》2014,92(5):166-170

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Gamna‐Gandy bodies: a case of mistaken identity in the spleen of a cat     

Julia K. Ryseff  Colleen Duncan  Gabriella Sfiligoi  Paul R. Avery 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2014,43(1):94-100

A 4‐year‐old, female spayed Domestic Shorthair cat was presented for a 2‐day history of lethargy, anorexia, and vomiting. Diagnostic assessments revealed a severe, regenerative anemia and the presence of a solitary, 3 × 4 cm splenic mass. Cytologic examination of fine‐needle aspirates of the splenic mass showed sheets of pleomorphic histiocytic cells with numerous intracellular and extracellular, negatively staining to deeply basophilic, branching structures. These structures were typically of thin uniform thickness with random angled branching that formed geometrical shapes and fragments, occasionally with sharpened ends and a crystalline appearance. Septal‐like divisions were irregularly spaced along some of the linear branches. The cytology was interpreted as a probable histiocytic inflammatory response to the unidentified foreign material with histiocytic sarcoma as a differential diagnosis. Histopathologic evaluation of the splenic mass resulted in a diagnosis of histiocytic sarcoma. The branching material stained positively for both iron and calcium, indicating that the material was compatible with Gamna‐Gandy bodies present secondary to tumor‐associated hemorrhage and the formation of calcium–iron complexes.  相似文献   

Mercury Flux to Sediments of Lake Tahoe, California–Nevada     

Paul E. Drevnick  Avery L. C. Shinneman  Carl H. Lamborg  Daniel R. Engstrom  Michael H. Bothner  James T. Oris 《Water, air, and soil pollution》2010,210(1-4):399-407

We report estimates of mercury (Hg) flux to the sediments of Lake Tahoe, California–Nevada: 2 and 15–20 µg/m²/year in preindustrial and modern sediments, respectively. These values result in a modern to preindustrial flux ratio of 7.5–10, which is similar to flux ratios recently reported for other alpine lakes in California, and greater than the value of 3 typically seen worldwide. We offer plausible hypotheses to explain the high flux ratios, including (1) proportionally less photoreduction and evasion of Hg with the onset of cultural eutrophication and (2) a combination of enhanced regional oxidation of gaseous elemental Hg and transport of the resulting reactive gaseous Hg to the surface with nightly downslope flows of air. If either of these mechanisms is correct, it could lead to local/regional solutions to lessen the impact of globally increasing anthropogenic emissions of Hg on Lake Tahoe and other alpine ecosystems.  相似文献   

Small intestinal starch digestion in steers: effect of various levels of abomasal glucose, corn starch and corn dextrin infusion on small intestinal disappearance and net glucose absorption   总被引：4，自引：0，他引：4  

K K Kreikemeier  D L Harmon  R T Brandt  T B Avery  D E Johnson 《Journal of animal science》1991,69(1):328-338

Eight Holstein steers (four at 300 kg, four at 406 kg) fitted with an elevated carotid artery, hepatic portal and mesenteric venous catheters, and abomasal and ileal cannulas were used in several 4 x 4 Latin square experiments to evaluate small intestinal starch digestion. They were fed alfalfa hay at 1.5% of BW and abomasally infused with water or glucose, corn starch or corn dextrin (one carbohydrate per Latin square) at 20, 40 or 60 g/h, with subsequent determination of small intestinal disappearance and net portal glucose absorption. Increasing the amount of all three carbohydrates infused abomasally increased the amount of carbohydrate disappearing in the small intestine. Increased infusion of glucose caused a continual increase (linear, P less than .01) in net glucose absorption, whereas net glucose absorption for starch and dextrin was maximal at the 20 g/h infusion (quadratic, P less than .05). With the 60 g/h infusion, 94% of the glucose but only 38% of starch and 29% of small intestinal dextrin disappearance could be accounted for as net glucose absorption, leaving a large portion of starch and dextrin disappearance unaccounted for. Of the infused starch and dextrin passing the ileum, 5.8 and 7.3%, respectively, was unpolymerized glucose, indicating that, at least in the distal small intestine, complete starch hydrolysis exceeded the capacity for glucose disappearance. It is concluded that only about 35% of the raw corn starch disappearing in the steer's small intestine resulted in net portal glucose absorption.  相似文献   

Effects of isoenergetic infusions of propionate and glucose on portal-drained visceral nutrient flux and concentrations of hormones in lambs maintained by total intragastric infusion   总被引：2，自引：0，他引：2  

K L Gross  D L Harmon  J E Minton  T B Avery 《Journal of animal science》1990,68(8):2566-2574

Three lambs were used in a repeated Latin square design to determine the influence of isoenergetic infusions of propionate or glucose on portal-drained visceral flux (PDV) of nutrients and concentrations of insulin, glucagon, growth hormone and prolactin. Lambs were fitted with appropriate catheters for blood sampling and maintained on total intragastric infusion of nutrients. Basal VFA, casein, mineral and vitamin infusions (isocaloric and isonitrogenous) were supplemented with an additional 22 +/- .5 kcal/h from propionate, glucose or a combination of propionate plus glucose. Ruminal fluid proportion and arterial blood concentration and PDV flux of propionate increased (P less than .10) by 17 mol/100 mol, .02 mM and 40 mmol/h, respectively, with infusion of an additional 61 mmol/h of propionate. Regression equations predicted that, on a net basis, 67% of ruminally infused propionate and 43% of abomasally infused glucose appeared in portal blood. Arterial L-lactate, beta-hydroxybutyrate and acetate concentrations, and beta-hydroxybutyrate flux were increased (P less than .10) by .34 mM, .20 mM, .50 mM and 4.2 mmol/h, respectively, with infusion of 33 mmol/h of added glucose. Net utilization of glucose by the PDV was approximately 4.4 mmol/h when no glucose was infused. Increased infusion of propionate resulted in a 22.2-micrograms/h increase in PDV flux of insulin (P less than .08) but had no effect on arterial insulin, glucagon and prolactin concentrations (P greater than .10). Arterial growth hormone increased by 3.8 ng/ml with increasing glucose infusion (P less than .08).(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

U.s. Farm dilemma: the global bad news is wrong     

Avery D 《Science (New York, N.Y.)》1985,230(4724):408-412

World agricultural production is at an all-time high and is climbing fast, especially in the developing countries. Even Africa has ample land and technology to feed its population, given more effective national policies. Higher agricultural output has been stimulated primarily by new technology, but also by investments and improved government policies. Constraints such as cropland shortage, soil erosion, and higher oil prices have been readily surmounted. High-technology agriculture has even overcome some major "systems breaks." Thus U.S. farmers will continue to face commercial surpluses of farm products in world markets in the years ahead.  相似文献