Pesticide resistance and world food production: ed. by Gordon Conway. ISBN 0-950-7744-1-3 (144 pp; £3.60 inc. postage and packing). London: Imperial College Centre for Environmental Technology     

K.J. Brent 《Crop Protection》1984,3(1):129-130

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Analyses of rumen fluid from "sudden death", lactic acidotic and healthy cattle fed high concentrate ration.     

J R Wilson  E E Bartley  H D Anthony  B E Brent  D A Sapienza  T E Chapman  A D Dayton  R J Milleret  R A Frey  R M Meyer 《Journal of animal science》1975,41(5):1249-1255

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Forensic pathology of canadian bread wheat: the case of tan spot     

Lamari L  McCallum BD  Depauw RM 《Phytopathology》2005,95(2):144-152

ABSTRACT Pyrenophora tritici-repentis causes necrosis and chlorosis in its wheat host. Susceptibility to races 2 (necrosis) and 5 (chlorosis) of the pathogen is known to be mediated by Ptr ToxA and Ptr ToxB, respectively. Sensitivity to each toxin is controlled by a single dominant and independently inherited gene. We used sensitivity to Ptr ToxA and Ptr ToxB as two genetic markers to investigate the origin and the state of tan spot susceptibility in Canadian Western Red Spring (CWRS) wheat over a period of more than a century. Sensitivity to Ptr ToxA, the toxin produced by nearly all isolates of the pathogen collected in the past 20 years in western Canada, appears to have been present in the first major cultivar, Red Fife, grown massively in the late 1800s. Sensitivity then was transmitted unknowingly into Canadian wheat lines through extensive use of backcrossing to maintain the Marquis-Thatcher breadmaking quality. Sensitivity to Ptr ToxA, which nearly disappeared from cultivars grown in western Canada in the 1950s, was reintroduced in the 1960s and unintentionally bred into many of the present-day cultivars. Sensitivity to Ptr ToxB, a toxin rarely found in isolates from western Canada, appeared with the release of Thatcher in 1934 and was transferred to many cultivars through backcross programs. In spite of large areas planted to Ptr ToxAand Ptr ToxB-sensitive cultivars over decades, tan spot epidemics remained sporadic until the 1970s. The results of this study raise the problem of the narrowing genetic base of CWRS wheat lines and the potential for unanticipated threats from plant pathogens. The intercrossing of genetically diverse material in one Canadian wheat breeding program resulted in the release of several modern cultivars with resistance to tan spot. The absence of wild-type Ptr ToxB-producing isolates in western Canada remains unexplained, given that sensitivity to Ptr ToxB was present continuously in western Canadian cultivars grown on vast areas for more than 70 years.  相似文献   

Perceptions of healthy eating in four Alberta communities: a photovoice project     

Brent A. Hammer  Helen Vallianatos  Candace I. J. Nykiforuk  Laura M. Nieuwendyk 《Agriculture and Human Values》2015,32(4):649-662

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A survey to detect Toxocara vitulorum and other gastrointestinal parasites in bison (Bison bison) herds from Manitoba and Saskatchewan     

Murray R. Woodbury  Brent Wagner  Elad Ben-Ezra  Dale Douma  Wendy Wilkins 《The Canadian veterinary journal. La revue veterinaire canadienne》2014,55(9):870-874

An egg count survey using environmental fecal samples obtained in spring or early summer was conducted to estimate the apparent prevalence of Toxocara vitulorum in unweaned bison calves and of other intestinal parasites in adult bison on 98 farms in Manitoba and Saskatchewan. Calf samples were pooled (maximum 5 samples per pool) by farm and positive pools were examined to determine individual T. vitulorum counts. Toxocara vitulorum eggs were found on 4 farms in Manitoba and none in Saskatchewan. Apparent herd-level prevalence estimates were 12% [95% confidence interval (95% CI): 3.4% to 28.2%] and 0% (95% CI: 0% to 5.7%) respectively. Samples from adult bison contained eggs/oocysts from trichostrongyle species, Eimeria sp., Monieza sp., Capillaria sp., Nematodirus sp. and Trichuris sp. in 100%, 95%, 72%, 13%, 13%, and 5% of herds, respectively. Strongyloides sp. were not found in any herd. Further studies are needed to assess parasite distribution patterns in bison and to evaluate the risk that T. vitulorum may pose to bison, cattle, and wildlife.  相似文献   

Successful Use of Endoscopy for Transcervical Cannulation Procedures in the Goat     

A Colagross‐Schouten  D Allison  L Brent  E Lissner 《Reproduction in domestic animals》2014,49(6):909-912

Two methods for transcervical cannulation of the goat were evaluated during a contraception study in 15 adult female Nigerian dwarf and African pygmy goats. Twenty‐four transcervical cannulation procedures were conducted in which seven females underwent the procedure 2–3 times. Initially, a rigid 4‐mm stainless steel cannula and external light source were used in 19 procedures to introduce the contraceptive compound into the uterus. Placement of the cannula was directed by feel or depth assessment. Of seven females that were euthanized following this procedure, four evidenced complications including penetration of the cervix with the cannula and cervical damage. A 2‐mm custom‐made endoscope with a specially designed cannula was then used for the remaining five procedures. No complications were found. A single animal, that underwent the endoscopic procedure twice, was euthanized for study purposes and no abnormal findings of the reproductive tract were reported. The use of an endoscope resulted in better outcomes because the uterus could be visualized after traversing the cervix.  相似文献   

Cell biology. A fishing buddy for hypothesis generators     

Brent R  Lok L 《Science (New York, N.Y.)》2005,308(5721):504-506

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The genome of the basidiomycetous yeast and human pathogen Cryptococcus neoformans     

Loftus BJ  Fung E  Roncaglia P  Rowley D  Amedeo P  Bruno D  Vamathevan J  Miranda M  Anderson IJ  Fraser JA  Allen JE  Bosdet IE  Brent MR  Chiu R  Doering TL  Donlin MJ  D'Souza CA  Fox DS  Grinberg V  Fu J  Fukushima M  Haas BJ  Huang JC  Janbon G  Jones SJ  Koo HL  Krzywinski MI  Kwon-Chung JK  Lengeler KB  Maiti R  Marra MA  Marra RE  Mathewson CA  Mitchell TG  Pertea M  Riggs FR  Salzberg SL  Schein JE  Shvartsbeyn A  Shin H  Shumway M  Specht CA  Suh BB  Tenney A  Utterback TR  Wickes BL  Wortman JR  Wye NH  Kronstad JW  Lodge JK 《Science (New York, N.Y.)》2005,307(5713):1321-1324

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Visual communication to children in the supermarket context: Health protective or exploitive?     

Brent Berry  Taralyn McMullen 《Agriculture and Human Values》2008,25(3):333-348

In light of growing concerns about obesity, Winson (2004, Agriculture and Human Values 21(4): 299–312) calls for more research into the supermarket foodscape as a point of connection between consumers and food choice. In this study, we systematically examine the marketing of ready-to-eat breakfast cereals to children in Toronto, Ontario supermarkets. The supermarket cereal aisle is a relatively unstudied visual collage of competing brands, colors, spokes-characters, and incentives aimed at influencing consumer choice. We found that breakfast cereal products with higher-than-average levels of sugar, refined grains, and trans-fats are more likely to feature child-oriented marketing in the form of spokes-characters, themed cereal shapes/colors, and child incentives on cereal boxes. These forms of visual communication are consistent with a “health exploitive” pattern of targeted marketing to children in the supermarket setting. Only one aspect of visual communication is consistent with a “health protective” pattern of marketing to children—cereals shelved within reach of children aged 4–8 had less sugar per serving and were less likely to contain trans-fats than less reachable products. We discuss the implications of our findings for the measurement and regulation of marketing to children in North American supermarkets.

Brent BerryEmail:

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Brent Berry   who has a PhD from the University of Michigan, is an Assistant Professor of Sociology at the University of Toronto in Ontario, Canada. His most recent research has sought to untangle the casual processes underlying socioeconomic disparities in health over the lifecourse. Brent has also developed innovative visual approaches for systematically studying interracial friendships, homelessness, and marketing in supermarkets. Brent has also published work on race and ethnic relations, residential segregation, social theory, and family intergenerational support. His work has been published in Demography, Health, Evaluation Review, Ethnic and Racial Studies, the Journal of Family Issues, and the American Journal of Economics and Sociology. Taralyn McMullen   is a doctoral candidate in Sociology at the University of Toronto. Taralyn is interested in the sociology of health and illness, with emphasis on issues of food insecurity. In addition to her collaborative work with Brent Berry, Taralyn has completed a research project examining the link between food insecurity, obesity, and gender discrimination in Canada.  相似文献   

Responses of ‘Petopride’ processing tomato to partial rootzone drying at different phenological stages   总被引：1，自引：0，他引：1  

Jorge A. Zegbe  M. Hossein Behboudian  Brent E. Clothier 《Irrigation Science》2006,25(1):85-85

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