Changes in Glucocorticoid Receptor Levels of Bovine Lymphocyte and Neutrophil during Estrous Cycle     

PE Martínez  MTP Lopes  MS Martins  AP Marques Jr  CE Salas 《Reproduction in domestic animals》1998,33(2):61-66

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Defining Dermo resistance phenotypes in an eastern oyster breeding population     

Dina A. Proestou  Ryan J. Corbett  Tal Ben‐Horin  Jessica M. Small  Standish K. Allen 《Aquaculture Research》2019,50(8):2142-2154

Perkinsus marinus, the causative agent of Dermo disease, is responsible for mass mortalities and negatively impacts aquaculture production of the eastern oyster, Crassostrea virginica. Selective breeding is a viable option for Dermo disease management; however, fluctuations in natural selection pressure and environmental noise hinder accumulation of genetic gains acquired through field performance trials. The purpose of this study was to adapt and apply laboratory disease challenge methods to eastern oysters, better characterize resistance‐specific traits and assess the potential for genetic variation in Dermo resistance among distinct families within a breeding population. Two challenge experiments were conducted, one in 2014 and the other in 2015. Significant treatment (control vs. challenged) and family effects on survival (measured as per cent survival and days to death) were detected in the 2014 challenge, while overall high survival precluded the detection of a significant family effect in the 2015 challenge. An alternate measure of resistance, parasite elimination rate, was also measured in the 2015 challenge, and this varied significantly among families. Thus, both survival and the change in parasite concentration in oyster tissues over time represent Dermo resistance phenotypes that can be measured accurately with the adapted laboratory disease challenge protocol described here. The obvious next step is to incorporate the challenge protocol in eastern oyster breeding programmes to assess whether well‐defined, accurately measured, Dermo‐resistant phenotypes result in enhanced genetic improvement for this commercially important trait.  相似文献   

Inhibitors of shikimate dehydrogenase as potential herbicides     

A. C. Baillie  J. R. Corbett  J. R. Dowsett  P. McCloskey 《Pest management science》1972,3(2):113-120

Shikimate dehydrogenase (E.C. 1.1.1.25) is found in plants but not in animals and is therefore an attractive target for a new herbicide. A series of 1,6-dihydroxy-2-oxoisonicotinic acid derivatives was prepared and shown to inhibit the enzyme reversibly. Weak active-site directed irreversible inhibitors based on these compounds were also synthesised but none was herbicidal.  相似文献   

Effects of certain growth substances on number of potato tubers     

H. W. Gausman  E. G. Corbett  R. A. Struchtemeyer 《American Journal of Potato Research》1958,35(11):742-746

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Inhibitors of choline acetyltransferase as potential insecticides     

Alister C. Baillie  John R. Corbett  John R. Dowsett  David B. Sattelle  Jean-Jacques Callec 《Pest management science》1975,6(6):645-653

Choline acetyltransferase (E.C.2.3.1.6) catalyses the synthesis of acetylcholine and is therefore a target for a new insecticide. We have prepared a variety of compounds, mainly choline analogues, as inhibitors of this enzyme. One of these, 2-isothiocyanatoethyltrimethylammonium iodide, has a K_i of 0.06 μM (K_m for choline is 150 μM ) and is apparently the most powerful inhibitor known for this enzyme. Although some of our compounds are insecticidal we believe, on the basis of electrophysiological studies, that they act, not on choline acetyltransferase, but on the acetylcholine receptor of the insect.  相似文献   

Late pleistocene extinctions     

Corbett JW  Beddall BG  Bronowski J  Martin PS 《Science (New York, N.Y.)》1973,180(4089):905-906

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Biochemical mode of action of the acaricide fenazaflor     

J. R. Corbett  B. J. Wright 《Pest management science》1970,1(4):120-123

The active ingredient of ‘Lovozal’ (fenazaflor) is hydrolysed in solution to 5,6-dichloro-2-trifluoromethyl-benzimidazole (DTFB). Rat liver mitochondria were uncoupled by fenazaflor after a lag phase, while uncoupling by DTFB was immediate, and a similar situation occurred with mitochondria isolated from Tetranychus telarius L. (This is the first report of isolation of mite mitochondria.) Since both compounds ultimately have the same uncoupling activity, it is likely that fenazaflor exerts its effect only after hydrolysis to DTFB. Living mites showed a stimulation of respiration of 70% on addition of either fenazaflor or DTFB before death occurred, suggesting that the acaricidal effect of fenazaflor is due to uncoupling of oxidative phosphorylation after hydrolysis to DTFB.  相似文献   

Thrombocytopenia Associated With Neoplasia in Dogs   总被引：3，自引：2，他引：1  

Carol B. Grindem  Edward B. Breitschwerdt  Wayne T. Corbett  Rodney L. Page  Heather E. Jans 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》1994,8(6):400-405

Ten percent (214/2,059) of all dogs with cancer at North Carolina State University Veterinary Teaching Hospital had thrombocytopenia. The thrombocytopenia was associated with infectious/inflammatory etiologies in 4%, miscellaneous disorders (therapy, bone marrow failure, disseminated intravascular coagulation) in 35%, and neoplasia without identifiable secondary factors in 61% of cancer-bearing dogs. Classifying these dogs by tumor groups revealed the following proportionate ratios: lymphoid, 29%; carcinoma, 28%; sarcoma, 20%; hemic neoplasia, 7%; multiple, 5%; unclassified, 3%; benign, 3%; brain, 3%; and endocrine, 3%. Dogs with hemangiosarcoma, lymphoma, and melanoma were at increased risk of developing thrombocytopenia. Cytotoxic therapy was the major factor increasing the risk of thrombocytopenia in dogs with melanoma. Golden Retrievers were the only breed recognized with a predisposition to develop thrombocytopenia. If thrombocytopenia is identified in a dog with cancer, we recommend thorough evaluation of the coagulation system before surgery or therapy, and careful consideration of the risks and potential benefits of myelosuppressive or L-asparaginase therapy.  相似文献   

Immune response to avian reovirus in chickens and protection against experimental infection     

J. MEANGER  R. WICKRAMASINGHE  CE ENRIQUEZ  GE WILCOX 《Australian veterinary journal》1997,75(6):428-432

Objectives To assess the efficacy of the vaccination procedure and the effect of the transfer of maternal antibodies to progeny chickens on reovirus pathogenicity.
Design To vaccinate chickens and challenge progeny chickens with high doses of homologous and heterologous viruses.
Procedure High doses of reovirus strains RAM-1, 1091 and 724 were used to induce tenosynovitis lesions. High doses were produced by concentration of viruses grown in cell culture. Then similar doses of viruses were used to challenge immunised chickens progeny.
Result Vaccination of breeding hens with the RAM-1 strain of avian reovirus, which resulted in the passive transfer of neutralising antibody to progeny chickens, completely prevented the development of tenosynovitis in 80% of progeny chickens infected with the homologous virus. Even though multiple injection of hens resulted in broadening of the normal type-specificity of the neutralising antibody response against heterologous serotypes of avian reovirus, only marginal protection against strains of two heterologous serotypes of avian reovirus was obtained.
Conclusions A model for assessing the efficacy of vaccination against avian reovirus strains on clinical signs such as tenosynovitis was developed that overcome the normal low virulence of Australian strains of avian reovirus. Breeding hens can be immunised with Australian strain of avian reovirus with passive transfer of antibody via the yolk to the progeny chickens. Although the neutralising antibody response to three injections of inactivated virus decreased the specificity of the neutralising antibody response against antigenically heterologous strains of avian reovirus, the protective immunity appeared to retain type-specificity.  相似文献   

Cereal Pratylenchus spp. in England and Wales, and their Recognition   总被引：3，自引：3，他引：0  

D. C. M. Corbett 《Plant pathology》1970,19(1):6-10

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