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RISS 인기검색어
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- 저자 : Hancocks, Stephen (검색결과 80 건)
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Seed longevity of glyphosate resistant transgenic creeping bentgrass (Agrostis stolonifera L.) lines
Hancock, Daniel,Park, Kee Woong,Mallory-Smith, Carol A. The Ecological Society of Korea 2015 Journal of Ecology and Environment Vol.38 No.4
Studies to estimate seed longevity and dormancy of creeping bentgrass (Agrostis stolonifera L.) were conducted from 2000 to 2005 at Corvallis and Hermiston, Oregon. Seeds from three transgenic glyphosate resistant creeping bentgrass lines, 48-10, 48-13, and ASR368, and one non-transgenic glyphosate susceptible line, SR1020, were used. Creeping bentgrass seeds were buried at 3, 18 and 31 cm in 2000 and removed 6, 12, 18, 24, and 51 months later. Soil type and climatic conditions were different at the two locations. At Corvallis, the soil was a Malabon silty clay loam, and the winters wet and mild. The soil at Hermiston was an Adkins fine sandy loam, and winters drier and colder. Seeds of all creeping bentgrass lines deteriorated faster at Corvallis than at Hermiston. The estimated half-lives of creeping bentgrass lines buried at Corvallis were 8.4 to 20.2 months, while those buried at Hermiston were 8.4 to 37.7 months. At both sites, seeds of the glyphosate resistant lines, 48-10 and 48-13, deteriorated faster than the susceptible line, SR1020. However, seed deterioration in the resistant line, ASR368, was slower than all other creeping bentgrass lines. Based on the germination test, exhumed intact seeds at Corvallis were more dormant than those at Hermiston. If buried, it could be expected that viable creeping bentgrass seeds will persist more than 4 years after the seeds are introduced to a site, but environmental conditions can influence both seed longevity and dormancy.
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비육돈에 있어 사료 급이기 디자인 , 펠렛 및 계절은 성장과 물 섭취에 영향을 준다
김인호,Hancock, J. D.,Goodband, R. D.,Rantanen, M. M.,Nelssen, J. L.,Tokach, M. D. 한국동물자원과학회 2000 한국축산학회지 Vol.42 No.6
In the first experiment, 300 pigs(initial body weight 50.6㎏) were used in two 70-d growth trials(summer and winter) to determine the effects of feeder designs, pelleting and season on growth performance in finishing pigs. Three different feeder designs were evaluated; 1) a dry type, two-hole feeder(Aco™; FD1), 2) a single-hole, wet/dry shelf feeder with a nipple waterer located at the base of the trough(Crystal Spring™; FD2), and 3) an eight-hole, round, dry feeder with a wheel agitator(Osborne™; FD3). ADG during the summer trial was not affected by the feeder design. However, pigs fed from the FD2 had a slight numerical advantage in ADG. No difference was observed for ADFI during the summer trial. Pigs fed from the FD2 had approximately 5.9% better feed efficiency(P$lt;0.05) than pigs consuming feed from either of the FDI or FD3. Similar to the results from the summer trial, no differences were observed in ADG or ADFI among pigs fed from the different feeders during the winter trial. In the second experiment, 288 finishing pigs(initial body weigh of 47.4 ㎏) were used in a 35-d growth assay. Treatments were 1) dry feeder with meal diet, 2) dry feeder with pelleted diet, 3) wet/dry feeder with meal diet and 4) wet/dry feeder with pelleted diet. Feeder designs were a simple two-hole, dry feeder(Pride of the Farm™) and a single-hole, wet/dry shelf feeder with a nipple waterer located at the base of the trough(Crystal Spring™). Pigs fed from the wet/dry feeders had 4% greater ADG(P$lt;0.04) than those fed from the dry feeders. Feeder design had no effect on ADFI or gain/feed(P$gt;0.24). Pigs fed the pelleted diet consumed less feed and had better gain/feed(P$lt;0.02 and P$lt;0.01, respectively) than pigs fed the diet in meal form. However, an interaction was noted among feeder type and diet form. In dry feeders, pelleting improved efficiency of gain by 8%, but with the wet/dry feeder, pelleting improved efficiency of gain by only 1% (feeder type × diet form interaction, P$lt;0.04). Pigs consuming feed from the wet/dry feeders had 50% less water disappearance(P$lt;0.001) than pigs fed from the dry feeder. In conclusion, the single hole, wet/dry resulted in improved feed efficiency and reduced water wastage compared with the dry feeders evaluated.
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Seed longevity of glyphosate resistant transgenic creeping bentgrass (Agrostis stolonifera L.) lines
Daniel Hancock,박기웅,Carol A. Mallory-Smith 한국생태학회 2015 Journal of Ecology and Environment Vol.38 No.4
Studies to estimate seed longevity and dormancy of creeping bentgrass (Agrostis stolonifera L.) were conducted from 2000 to 2005 at Corvallis and Hermiston, Oregon. Seeds from three transgenic glyphosate resistant creeping bentgrass lines, 48-10, 48-13, and ASR368, and one non-transgenic glyphosate susceptible line, SR1020, were used. Creeping bentgrass seeds were buried at 3, 18 and 31 cm in 2000 and removed 6, 12, 18, 24, and 51 months later. Soil type and climatic conditions were different at the two locations. At Corvallis, the soil was a Malabon silty clay loam, and the winters wet and mild. The soil at Hermiston was an Adkins fine sandy loam, and winters drier and colder. Seeds of all creeping bentgrass lines deteriorated faster at Corvallis than at Hermiston. The estimated half-lives of creeping bentgrass lines buried at Corvallis were 8.4 to 20.2 months, while those buried at Hermiston were 8.4 to 37.7 months. At both sites, seeds of the glyphosate resistant lines, 48-10 and 48-13, deteriorated faster than the susceptible line, SR1020. However, seed deterioration in the resistant line, ASR368, was slower than all other creeping bentgrass lines. Based on the germination test, exhumed intact seeds at Corvallis were more dormant than those at Hermiston. If buried, it could be expected that viable creeping bentgrass seeds will persist more than 4 years after the seeds are introduced to a site, but environmental conditions can influence both seed longevity and dormancy.
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Bae, Wonki,Hancock, Dale D.,Call, Douglas R.,Park, Yong Ho,Berge, Anna Catharina B.,Finger, Regina M.,Sischo, William M.,Besser, Thomas E. Elsevier 2007 Veterinary microbiology Vol.122 No.3-4
<P><B>Abstract</B></P><P>The purpose of this study was to investigate the genetic similarity of <I>Campylobacter jejuni</I> and <I>Campylobacter coli</I> with similar antimicrobial resistance phenotypes, isolated from cattle on different farms and at different times, in order to evaluate the possible existence of disseminated antimicrobial resistant clones. PFGE after <I>Sma</I>I and <I>Kpn</I>I restriction identified 23 and 16 distinct PFGE patterns among 29 <I>C. jejuni</I> and 66 <I>C. coli</I> isolates, respectively. In <I>C. coli</I>, 51 (77%) of the resistant isolates demonstrated one of the four indistinguishable PFGE patterns, whereas only 24% doxycycline resistant <I>C. jejuni</I> shared one of the two indistinguishable PFGE patterns. The genetic mechanisms of resistance were homogeneous within and between these clonal types. Genetically indistinguishable (clonal) groups of <I>C. coli</I> accounted for most <I>Campylobacter</I> sp. with multiple antimicrobial resistance observed in this study, consistent with a role for clonal dissemination in the epidemiology of resistance in this species.</P>
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GERMEN UNIFICATION: IMPLICATIONS FOR EUROPEAN UNION
G.D. Hancock 사람과세계경영학회 1996 Global Business and Finance Review Vol.1 No.1
The German experience ofunifying two dis-similar economies may provide invaluable insights to Europe as it struggles with monetary union. The purpose of this paper is to examine the impact of German unification on interest rates, inflation and the value ofthe DM in an effort to assess implicationsfor European economic union. The results ofthis study suggest that Germany achieved unification with relatively minor interruptions to its international parity relationships andfinancial stability. In orderfor the European community to experience a like transition, members would most likely need to provide for a cooperative, consistent monetaty policy.
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The Use of Plasma Glycoproteomics for the Early Detection of Disease
W.S. Hancock,M. Hincapie,M. Kullolli,T. Plavina 한국당과학회 2008 한국당과학회 학술대회 Vol.2008 No.1
Mechanisms underlying disease pathogenesis are not well understood in the context of common etiological factors such as microbial infection, inflammation, malignancy or tissue breakdown. Such processes may be elucidated by identifying disease-related molecular markers, such as acute phase proteins, cytokines, cytoskeletal fragments and autoantigens. In an attempt to identify such markers, we have developed a novel platform, namely multiple lectin affinity chromatography (M-LAC) to study the plasma glycoproteome in patients and healthy donors in a series of studies ranging from cancer to autoimmune disease. The M-LAC platform allowed the evaluation of changes in concentration of glycoproteins, and to comprehensively survey the plasma proteome. We then used a second method, intact peptidomics, to assess changes in endogenous proteolytic activity by analyzing the low molecular weight (LMW) component of blood. The integrated proteomic and peptidomic analysis of plasma samples identified a number of cytoskeletal and Ca2+-binding proteins and their proteolytic fragments in the disease samples. The measurements were compared to healthy donors and several of the observed differential quantitations were independently verified by ELISA. The identified changes in plasma proteome and peptidome, and the underlying changes in glycosylation together with altered endogenous protease activity may result in the generation of novel autoantigens. We and others have confirmed this hypothesis by the observation of autoantibodies in patients and upon extension of these studies to larger populations of patient; we may gain additional understanding of the role of etiological factors in different disease pathways.
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GERMAN UNIFICATION: IMPLICATIONS FOR EUROPEAN UNION
G D Hancock People&Global Business Association 1996 Global Business and Finance Review Vol.1 No.1
The German experience of unifying two dis-similar economies may provide invaluable insights to Europe as it struggles with monetary union. The purpose of this paper is to examine the impact of German unification on interest rates, inflation and the value of the DM in an effort to assess implications for European economic union. The results of this study suggest that Germany achieved unification with relatively minor interruptions to its international parity relationships and financial stability. In order for the European community to experience a like transition, members would most likely need to provide for a cooperative, consistent monetaty policy.
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