Oral papillomas in cattle     

J L Samuel  P B Spradbrow  A L Wood  W R Kelly 《Zentralblatt für Veterin?rmedizin. Reihe B. Journal of veterinary medicine. Series B》1985,32(9):706-714

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Rabies in an Israeli zoological garden     

David D  Perl S  Davidson I  Avni-Magen N  Yakobson BA 《The Veterinary record》2007,160(9):301-303

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Economic and epidemiological aspects of an outbreak of sheeppox in a dairy sheep flock     

Yeruham I  Yadin H  Van Ham M  Bumbarov V  Soham A  Perl S 《The Veterinary record》2007,160(7):236-237

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The role of p38 mitogen-activated kinase (MAPK) in the mechanism regulating cyclooxygenase gene expression in equine leukocytes     

Eckert RE  Neuder LE  Bell JL  Trujillo JC  Jones SL 《Veterinary immunology and immunopathology》2007,118(3-4):294-303

The goal of this study was to define the role for p38 mitogen-activated kinase (MAPK) in the signaling mechanism regulating pro-inflammatory cyclooxygenase (COX) gene expression in lipopolysaccharide (LPS)-activated equine leukocytes for the purposes of identifying novel targets for anti-inflammatory therapy in endotoxemic horses. The p38 MAPK has been shown to positively regulate inflammatory gene expression in human leukocytes and can be activated by a variety of stimuli including LPS, TNF-alpha, and IL-1. Activation-associated phosphorylated p38 MAPK has been implicated in the up-regulation of several inflammatory genes, including COX-2 which ultimately results in the production of prostanoids that are responsible for the pathophysiology associated with endotoxemia. Our hypothesis is that activation of p38 MAPK is essential for LPS-induced COX-2 expression in equine peripheral blood leukocytes. We tested our hypothesis by investigating the effects of the specific p38 MAPK inhibitors SB203580 and SB202190 on LPS-induced COX-2 protein expression and PGE(2) production in equine leukocytes. LPS stimulation activated p38 MAPK and increased COX-2 expression in a dose-dependent manner with maximal activation observed after 30min and 4h, respectively, at a concentration of 10 ng/ml LPS. In contrast, LPS stimulation did not affect COX-1 protein expression. Pretreatment with SB203580 or SB202190 significantly inhibited LPS-induced activation-associated p38 MAPK phosphorylation, COX-2 mRNA and protein levels, and PGE(2) production in equine leukocytes. Maximal inhibition of LPS-induced COX-2 protein expression was achieved at a concentration of 10 microM SB203580. We concluded that p38 MAPK is essential for LPS-induced COX-2 expression suggesting that p38 MAPK is a potential target for anti-inflammatory therapy during equine endotoxemia.  相似文献   

防治月季蜘蛛螨的探索     

Samuel Nyalala  胡丽萍 《中国花卉园艺》2006,(2):35-36

月季在国际切花市场的销售量一直位居第一,并且是欧洲及世界其他地区公园和庭院的主要观赏植物。但是,蜘蛛螨(二点叶螨)严重影响了陆地和温室栽培月季的质量。这是因为蜘蛛螨能够越冬繁殖且生长发育速度快,并且能快速对大多数广谱杀螨剂产生抗性。人们一直在寻求防治蜘蛛螨的最  相似文献   

Long-term electricity production from soil electrogenic bacteria and high-content screening of biofilm formation on the electrodes     

Samuel Raj Babu Arulmani  Vimalan Jayaraj  Solomon RobinsonDavid Jebakumar 《Journal of Soils and Sediments》2016,16(3):831-841

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Nitrogen mineralization in a pecan (Carya illinoensis K. Koch)–cotton (Gossypium hirsutum L.) alley cropping system in the southern United States     

Samuel C. Allen  Shibu Jose  P. K. R. Nair  Barry J. Brecke  Vimala D. Nair  Donald A. Graetz  Craig L. Ramsey 《Biology and Fertility of Soils》2005,41(1):28-37

Information on temporal and spatial patterns of N mineralization is critical in designing tree-crop mixed systems that could maximize N uptake while minimizing N loss. We quantified N mineralization rates in a pecan (Carya illinoensis K. Koch)–cotton (Gossypium hirsutum L.) alley cropping system in northwestern Florida with (non-barrier) and without tree-crop belowground interactions (barrier separating the root systems of pecan and cotton). Monthly rates of mineralization were estimated using buried bag incubations over a 15-month period. In addition, seasonal mineralization rates and cotton lint yield on soils supplied with two sources of N—inorganic fertilizer and organic poultry litter—were assessed. Results indicated that temporal variations in net NH₄ and NO₃ accumulation and mineralization rates were driven primarily by environmental factors and to a lesser degree by initial soil NH₄ and NO₃ levels. Mineralization varied by belowground interaction treatment during the initial growing season, when the non-barrier treatment exhibited a higher mineralization rate than the barrier treatment, likely due to reduced nutrient uptake by cotton in the non-barrier or a higher degree of immobilization in the barrier treatment. Mineralization during the second growing season was similar for both treatments. Source of N had no effects on N transformation in the soil. Lint yield reductions were observed in the non-barrier treatment during both years compared to the barrier treatment, likely due to interspecific competition for water. Yield differences between treatments in the second growing season were likely compounded by a diminishing pre-study fallow effect. Source of N was found to have a significant effect on cotton yield, with inorganic fertilizer resulting in 39% higher lint compared to poultry litter in the barrier treatment.  相似文献   

The effect of sample storage on the extraction of Cu,Zn, Fe,Mn and organic material from oxidized estuarine sediments     

Elizabeth A. Thomson  Samuel N. Luoma  Daniel J. Cain  Christopher Johansson 《Water, air, and soil pollution》1980,14(1):215-233

Concentrations of extractable Cu, Zn, Fe and Mn in oxidized estuarine sediment are influenced by the manner and time of storage between collection and extraction. No storage method tested completely preserves the initial chemical and physical characteristics of the sediment. Freezing or (for some extractions) drying are adequate methods of storage if sediments are to be extracted only with acids. However, if a variety of extractants is to be used, extractions should be conducted as soon as practical after collection.  相似文献   

Influence of aroma compounds on the mechanical properties of pectin gels     

Lubbers S  Decourcelle N 《Journal of agricultural and food chemistry》2004,52(5):1277-1280

A detailed study of the rheological behavior of pectin gels, in the presence of aroma compounds in food concentration is reported. In high methoxylated pectin (HMP) gels, it has not yet been shown if aroma compounds can be responsible for modifications in rheology. Two rheological techniques were used to measure the impact of aroma substances on rheological properties of HMP-based systems. Maximum strain to fracture (sigma F) was compared between flavored and unflavored gels on stress-displacement curve, which was obtained with uniaxial compression until fracture. An oscillatory rheometer was applied to determine the gelation time (Tgel). It appeared that all the aroma compounds studied increased significantly sigma F. It is generally acknowledged that hydrophobic interactions are the main interactions leading to HMP gelation, and the more hydrophobic interactions there are, the higher the sigma F. It is assumed that esters might increase sigma F through the increase of hydrophobic interactions in HMP network. For solvents (ethanol, propylene glycol), a cosolute effect could explain the increase in firmness for HMP-based gels.  相似文献   

The effect of aqueous extract of gross and commercial yerba mate (Ilex paraguariensis) on intra-abdominal and epididymal fat and glucose levels in male Wistar rats     

Silva RD  Bueno AL  Gallon CW  Gomes LF  Kaiser S  Pavei C  Ortega GG  Kucharski LC  Jahn MP 《Fitoterapia》2011,82(6):818-826

This study analyzed the plasma lipid profile, glucose levels and fat deposits in male rats treated with aqueous extract of gross yerba mate, commercial yerba mate or water. Yerba mate treatment did not change body weight gain and lipid profile. The consumption of gross yerba mate significantly increased blood glucose (6.6 mmol/L) as compared to the water (4.8 mmol/L) and commercial group (5.2 mmol/L) and decreased epididymal and intra-abdominal deposits (10.1 mg/g and 23.7 mg/g of weight) as compared to the water (15.4 mg/g and 36.9 mg/g of weight) and commercial group (12.5 mg/g and 28 mg/g of weight). The results suggest that gross yerba mate reduces fat more efficiently but produces a greater increase in blood glucose when compared to commercial yerba mate and water groups.  相似文献