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  • Male  (17)
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  • 1
    Publication Date: 2013-06-01
    Description: A genome-wide association study (GWAS) of educational attainment was conducted in a discovery sample of 101,069 individuals and a replication sample of 25,490. Three independent single-nucleotide polymorphisms (SNPs) are genome-wide significant (rs9320913, rs11584700, rs4851266), and all three replicate. Estimated effects sizes are small (coefficient of determination R(2) approximately 0.02%), approximately 1 month of schooling per allele. A linear polygenic score from all measured SNPs accounts for approximately 2% of the variance in both educational attainment and cognitive function. Genes in the region of the loci have previously been associated with health, cognitive, and central nervous system phenotypes, and bioinformatics analyses suggest the involvement of the anterior caudate nucleus. These findings provide promising candidate SNPs for follow-up work, and our effect size estimates can anchor power analyses in social-science genetics.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3751588/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3751588/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rietveld, Cornelius A -- Medland, Sarah E -- Derringer, Jaime -- Yang, Jian -- Esko, Tonu -- Martin, Nicolas W -- Westra, Harm-Jan -- Shakhbazov, Konstantin -- Abdellaoui, Abdel -- Agrawal, Arpana -- Albrecht, Eva -- Alizadeh, Behrooz Z -- Amin, Najaf -- Barnard, John -- Baumeister, Sebastian E -- Benke, Kelly S -- Bielak, Lawrence F -- Boatman, Jeffrey A -- Boyle, Patricia A -- Davies, Gail -- de Leeuw, Christiaan -- Eklund, Niina -- Evans, Daniel S -- Ferhmann, Rudolf -- Fischer, Krista -- Gieger, Christian -- Gjessing, Hakon K -- Hagg, Sara -- Harris, Jennifer R -- Hayward, Caroline -- Holzapfel, Christina -- Ibrahim-Verbaas, Carla A -- Ingelsson, Erik -- Jacobsson, Bo -- Joshi, Peter K -- Jugessur, Astanand -- Kaakinen, Marika -- Kanoni, Stavroula -- Karjalainen, Juha -- Kolcic, Ivana -- Kristiansson, Kati -- Kutalik, Zoltan -- Lahti, Jari -- Lee, Sang H -- Lin, Peng -- Lind, Penelope A -- Liu, Yongmei -- Lohman, Kurt -- Loitfelder, Marisa -- McMahon, George -- Vidal, Pedro Marques -- Meirelles, Osorio -- Milani, Lili -- Myhre, Ronny -- Nuotio, Marja-Liisa -- Oldmeadow, Christopher J -- Petrovic, Katja E -- Peyrot, Wouter J -- Polasek, Ozren -- Quaye, Lydia -- Reinmaa, Eva -- Rice, John P -- Rizzi, Thais S -- Schmidt, Helena -- Schmidt, Reinhold -- Smith, Albert V -- Smith, Jennifer A -- Tanaka, Toshiko -- Terracciano, Antonio -- van der Loos, Matthijs J H M -- Vitart, Veronique -- Volzke, Henry -- Wellmann, Jurgen -- Yu, Lei -- Zhao, Wei -- Allik, Juri -- Attia, John R -- Bandinelli, Stefania -- Bastardot, Francois -- Beauchamp, Jonathan -- Bennett, David A -- Berger, Klaus -- Bierut, Laura J -- Boomsma, Dorret I -- Bultmann, Ute -- Campbell, Harry -- Chabris, Christopher F -- Cherkas, Lynn -- Chung, Mina K -- Cucca, Francesco -- de Andrade, Mariza -- De Jager, Philip L -- De Neve, Jan-Emmanuel -- Deary, Ian J -- Dedoussis, George V -- Deloukas, Panos -- Dimitriou, Maria -- Eiriksdottir, Guethny -- Elderson, Martin F -- Eriksson, Johan G -- Evans, David M -- Faul, Jessica D -- Ferrucci, Luigi -- Garcia, Melissa E -- Gronberg, Henrik -- Guethnason, Vilmundur -- Hall, Per -- Harris, Juliette M -- Harris, Tamara B -- Hastie, Nicholas D -- Heath, Andrew C -- Hernandez, Dena G -- Hoffmann, Wolfgang -- Hofman, Adriaan -- Holle, Rolf -- Holliday, Elizabeth G -- Hottenga, Jouke-Jan -- Iacono, William G -- Illig, Thomas -- Jarvelin, Marjo-Riitta -- Kahonen, Mika -- Kaprio, Jaakko -- Kirkpatrick, Robert M -- Kowgier, Matthew -- Latvala, Antti -- Launer, Lenore J -- Lawlor, Debbie A -- Lehtimaki, Terho -- Li, Jingmei -- Lichtenstein, Paul -- Lichtner, Peter -- Liewald, David C -- Madden, Pamela A -- Magnusson, Patrik K E -- Makinen, Tomi E -- Masala, Marco -- McGue, Matt -- Metspalu, Andres -- Mielck, Andreas -- Miller, Michael B -- Montgomery, Grant W -- Mukherjee, Sutapa -- Nyholt, Dale R -- Oostra, Ben A -- Palmer, Lyle J -- Palotie, Aarno -- Penninx, Brenda W J H -- Perola, Markus -- Peyser, Patricia A -- Preisig, Martin -- Raikkonen, Katri -- Raitakari, Olli T -- Realo, Anu -- Ring, Susan M -- Ripatti, Samuli -- Rivadeneira, Fernando -- Rudan, Igor -- Rustichini, Aldo -- Salomaa, Veikko -- Sarin, Antti-Pekka -- Schlessinger, David -- Scott, Rodney J -- Snieder, Harold -- St Pourcain, Beate -- Starr, John M -- Sul, Jae Hoon -- Surakka, Ida -- Svento, Rauli -- Teumer, Alexander -- LifeLines Cohort Study -- Tiemeier, Henning -- van Rooij, Frank J A -- Van Wagoner, David R -- Vartiainen, Erkki -- Viikari, Jorma -- Vollenweider, Peter -- Vonk, Judith M -- Waeber, Gerard -- Weir, David R -- Wichmann, H-Erich -- Widen, Elisabeth -- Willemsen, Gonneke -- Wilson, James F -- Wright, Alan F -- Conley, Dalton -- Davey-Smith, George -- Franke, Lude -- Groenen, Patrick J F -- Hofman, Albert -- Johannesson, Magnus -- Kardia, Sharon L R -- Krueger, Robert F -- Laibson, David -- Martin, Nicholas G -- Meyer, Michelle N -- Posthuma, Danielle -- Thurik, A Roy -- Timpson, Nicholas J -- Uitterlinden, Andre G -- van Duijn, Cornelia M -- Visscher, Peter M -- Benjamin, Daniel J -- Cesarini, David -- Koellinger, Philipp D -- AA09367/AA/NIAAA NIH HHS/ -- AA11886/AA/NIAAA NIH HHS/ -- BB/F019394/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- CZB/4/710/Chief Scientist Office/United Kingdom -- DA024417/DA/NIDA NIH HHS/ -- DA029377/DA/NIDA NIH HHS/ -- DA05147/DA/NIDA NIH HHS/ -- DA13240/DA/NIDA NIH HHS/ -- ETM/55/Chief Scientist Office/United Kingdom -- F31 DA029377/DA/NIDA NIH HHS/ -- G0600705/Medical Research Council/United Kingdom -- G0700704/Medical Research Council/United Kingdom -- G9815508/Medical Research Council/United Kingdom -- K05 AA017688/AA/NIAAA NIH HHS/ -- MC_PC_U127561128/Medical Research Council/United Kingdom -- MC_UU_12013/1/Medical Research Council/United Kingdom -- MC_UU_12013/3/Medical Research Council/United Kingdom -- MC_UU_12013/5/Medical Research Council/United Kingdom -- MH016880/MH/NIMH NIH HHS/ -- MH066140/MH/NIMH NIH HHS/ -- MR/K026992/1/Medical Research Council/United Kingdom -- P01 AG005842/AG/NIA NIH HHS/ -- P01 CA089392/CA/NCI NIH HHS/ -- P01 GM099568/GM/NIGMS NIH HHS/ -- P01-AG005842/AG/NIA NIH HHS/ -- P01-AG005842-20S2/AG/NIA NIH HHS/ -- P30 AG012810/AG/NIA NIH HHS/ -- P30-AG012810/AG/NIA NIH HHS/ -- R01 AA009367/AA/NIAAA NIH HHS/ -- R01 AA011886/AA/NIAAA NIH HHS/ -- R01 DA013240/DA/NIDA NIH HHS/ -- R01 HL090620/HL/NHLBI NIH HHS/ -- R01 HL105756/HL/NHLBI NIH HHS/ -- R01 HL111314/HL/NHLBI NIH HHS/ -- R01 MH066140/MH/NIMH NIH HHS/ -- R37 DA005147/DA/NIDA NIH HHS/ -- T32 AG000186/AG/NIA NIH HHS/ -- T32 MH016880/MH/NIMH NIH HHS/ -- T32-AG000186-23/AG/NIA NIH HHS/ -- U01 AG009740/AG/NIA NIH HHS/ -- U01 DA024417/DA/NIDA NIH HHS/ -- Z01 AG001050-01/Intramural NIH HHS/ -- ZIA AG000196-03/Intramural NIH HHS/ -- ZIA AG000196-04/Intramural NIH HHS/ -- New York, N.Y. -- Science. 2013 Jun 21;340(6139):1467-71. doi: 10.1126/science.1235488. Epub 2013 May 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Applied Economics, Erasmus School of Economics, Erasmus University Rotterdam, Rotterdam, Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23722424" target="_blank"〉PubMed〈/a〉
    Keywords: Cognition ; *Educational Status ; Endophenotypes ; Female ; Genetic Loci ; *Genome-Wide Association Study ; Humans ; Male ; Multifactorial Inheritance ; *Polymorphism, Single Nucleotide
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2012-09-18
    Description: There is evidence across several species for genetic control of phenotypic variation of complex traits, such that the variance among phenotypes is genotype dependent. Understanding genetic control of variability is important in evolutionary biology, agricultural selection programmes and human medicine, yet for complex traits, no individual genetic variants associated with variance, as opposed to the mean, have been identified. Here we perform a meta-analysis of genome-wide association studies of phenotypic variation using approximately 170,000 samples on height and body mass index (BMI) in human populations. We report evidence that the single nucleotide polymorphism (SNP) rs7202116 at the FTO gene locus, which is known to be associated with obesity (as measured by mean BMI for each rs7202116 genotype), is also associated with phenotypic variability. We show that the results are not due to scale effects or other artefacts, and find no other experiment-wise significant evidence for effects on variability, either at loci other than FTO for BMI or at any locus for height. The difference in variance for BMI among individuals with opposite homozygous genotypes at the FTO locus is approximately 7%, corresponding to a difference of approximately 0.5 kilograms in the standard deviation of weight. Our results indicate that genetic variants can be discovered that are associated with variability, and that between-person variability in obesity can partly be explained by the genotype at the FTO locus. The results are consistent with reported FTO by environment interactions for BMI, possibly mediated by DNA methylation. Our BMI results for other SNPs and our height results for all SNPs suggest that most genetic variants, including those that influence mean height or mean BMI, are not associated with phenotypic variance, or that their effects on variability are too small to detect even with samples sizes greater than 100,000.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3564953/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3564953/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yang, Jian -- Loos, Ruth J F -- Powell, Joseph E -- Medland, Sarah E -- Speliotes, Elizabeth K -- Chasman, Daniel I -- Rose, Lynda M -- Thorleifsson, Gudmar -- Steinthorsdottir, Valgerdur -- Magi, Reedik -- Waite, Lindsay -- Smith, Albert Vernon -- Yerges-Armstrong, Laura M -- Monda, Keri L -- Hadley, David -- Mahajan, Anubha -- Li, Guo -- Kapur, Karen -- Vitart, Veronique -- Huffman, Jennifer E -- Wang, Sophie R -- Palmer, Cameron -- Esko, Tonu -- Fischer, Krista -- Zhao, Jing Hua -- Demirkan, Ayse -- Isaacs, Aaron -- Feitosa, Mary F -- Luan, Jian'an -- Heard-Costa, Nancy L -- White, Charles -- Jackson, Anne U -- Preuss, Michael -- Ziegler, Andreas -- Eriksson, Joel -- Kutalik, Zoltan -- Frau, Francesca -- Nolte, Ilja M -- Van Vliet-Ostaptchouk, Jana V -- Hottenga, Jouke-Jan -- Jacobs, Kevin B -- Verweij, Niek -- Goel, Anuj -- Medina-Gomez, Carolina -- Estrada, Karol -- Bragg-Gresham, Jennifer Lynn -- Sanna, Serena -- Sidore, Carlo -- Tyrer, Jonathan -- Teumer, Alexander -- Prokopenko, Inga -- Mangino, Massimo -- Lindgren, Cecilia M -- Assimes, Themistocles L -- Shuldiner, Alan R -- Hui, Jennie -- Beilby, John P -- McArdle, Wendy L -- Hall, Per -- Haritunians, Talin -- Zgaga, Lina -- Kolcic, Ivana -- Polasek, Ozren -- Zemunik, Tatijana -- Oostra, Ben A -- Junttila, M Juhani -- Gronberg, Henrik -- Schreiber, Stefan -- Peters, Annette -- Hicks, Andrew A -- Stephens, Jonathan -- Foad, Nicola S -- Laitinen, Jaana -- Pouta, Anneli -- Kaakinen, Marika -- Willemsen, Gonneke -- Vink, Jacqueline M -- Wild, Sarah H -- Navis, Gerjan -- Asselbergs, Folkert W -- Homuth, Georg -- John, Ulrich -- Iribarren, Carlos -- Harris, Tamara -- Launer, Lenore -- Gudnason, Vilmundur -- O'Connell, Jeffrey R -- Boerwinkle, Eric -- Cadby, Gemma -- Palmer, Lyle J -- James, Alan L -- Musk, Arthur W -- Ingelsson, Erik -- Psaty, Bruce M -- Beckmann, Jacques S -- Waeber, Gerard -- Vollenweider, Peter -- Hayward, Caroline -- Wright, Alan F -- Rudan, Igor -- Groop, Leif C -- Metspalu, Andres -- Khaw, Kay Tee -- van Duijn, Cornelia M -- Borecki, Ingrid B -- Province, Michael A -- Wareham, Nicholas J -- Tardif, Jean-Claude -- Huikuri, Heikki V -- Cupples, L Adrienne -- Atwood, Larry D -- Fox, Caroline S -- Boehnke, Michael -- Collins, Francis S -- Mohlke, Karen L -- Erdmann, Jeanette -- Schunkert, Heribert -- Hengstenberg, Christian -- Stark, Klaus -- Lorentzon, Mattias -- Ohlsson, Claes -- Cusi, Daniele -- Staessen, Jan A -- Van der Klauw, Melanie M -- Pramstaller, Peter P -- Kathiresan, Sekar -- Jolley, Jennifer D -- Ripatti, Samuli -- Jarvelin, Marjo-Riitta -- de Geus, Eco J C -- Boomsma, Dorret I -- Penninx, Brenda -- Wilson, James F -- Campbell, Harry -- Chanock, Stephen J -- van der Harst, Pim -- Hamsten, Anders -- Watkins, Hugh -- Hofman, Albert -- Witteman, Jacqueline C -- Zillikens, M Carola -- Uitterlinden, Andre G -- Rivadeneira, Fernando -- Kiemeney, Lambertus A -- Vermeulen, Sita H -- Abecasis, Goncalo R -- Schlessinger, David -- Schipf, Sabine -- Stumvoll, Michael -- Tonjes, Anke -- Spector, Tim D -- North, Kari E -- Lettre, Guillaume -- McCarthy, Mark I -- Berndt, Sonja I -- Heath, Andrew C -- Madden, Pamela A F -- Nyholt, Dale R -- Montgomery, Grant W -- Martin, Nicholas G -- McKnight, Barbara -- Strachan, David P -- Hill, William G -- Snieder, Harold -- Ridker, Paul M -- Thorsteinsdottir, Unnur -- Stefansson, Kari -- Frayling, Timothy M -- Hirschhorn, Joel N -- Goddard, Michael E -- Visscher, Peter M -- 090532/Wellcome Trust/United Kingdom -- 14136/Cancer Research UK/United Kingdom -- AA014041/AA/NIAAA NIH HHS/ -- AA07535/AA/NIAAA NIH HHS/ -- AA10248/AA/NIAAA NIH HHS/ -- AA13320/AA/NIAAA NIH HHS/ -- AA13321/AA/NIAAA NIH HHS/ -- AA13326/AA/NIAAA NIH HHS/ -- CZB/4/710/Chief Scientist Office/United Kingdom -- DA12854/DA/NIDA NIH HHS/ -- F32 AR059469/AR/NIAMS NIH HHS/ -- F32 DK079466/DK/NIDDK NIH HHS/ -- G0601261/Medical Research Council/United Kingdom -- G1000143/Medical Research Council/United Kingdom -- GM057091/GM/NIGMS NIH HHS/ -- HHSN268201100005C/HL/NHLBI NIH HHS/ -- HHSN268201100006C/HL/NHLBI NIH HHS/ -- HHSN268201100007C/HL/NHLBI NIH HHS/ -- HHSN268201100008C/HL/NHLBI NIH HHS/ -- HHSN268201100009C/HL/NHLBI NIH HHS/ -- HHSN268201100010C/HL/NHLBI NIH HHS/ -- HHSN268201100011C/HL/NHLBI NIH HHS/ -- HHSN268201100012C/HL/NHLBI NIH HHS/ -- K05 AA017688/AA/NIAAA NIH HHS/ -- K23 DK080145/DK/NIDDK NIH HHS/ -- MC_PC_U127561128/Medical Research Council/United Kingdom -- MC_U106179471/Medical Research Council/United Kingdom -- MC_U127561128/Medical Research Council/United Kingdom -- N01 AG012100/AG/NIA NIH HHS/ -- N01 HC015103/HC/NHLBI NIH HHS/ -- N01 HC025195/HC/NHLBI NIH HHS/ -- N01 HC035129/HC/NHLBI NIH HHS/ -- N01 HC045133/HC/NHLBI NIH HHS/ -- N01 HC055222/HC/NHLBI NIH HHS/ -- N01 HC075150/HC/NHLBI NIH HHS/ -- N01 HC085079/HC/NHLBI NIH HHS/ -- N01 HG065403/HG/NHGRI NIH HHS/ -- N01HC85086/HL/NHLBI NIH HHS/ -- N02 HL64278/HL/NHLBI NIH HHS/ -- P30 DK063491/DK/NIDDK NIH HHS/ -- P30 DK072488/DK/NIDDK NIH HHS/ -- R01 AA007535/AA/NIAAA NIH HHS/ -- R01 AA013320/AA/NIAAA NIH HHS/ -- R01 AA013321/AA/NIAAA NIH HHS/ -- R01 AA013326/AA/NIAAA NIH HHS/ -- R01 AA014041/AA/NIAAA NIH HHS/ -- R01 AG015928/AG/NIA NIH HHS/ -- R01 AG020098/AG/NIA NIH HHS/ -- R01 AG023629/AG/NIA NIH HHS/ -- R01 AG027058/AG/NIA NIH HHS/ -- R01 DA012854/DA/NIDA NIH HHS/ -- R01 DK062370/DK/NIDDK NIH HHS/ -- R01 DK072193/DK/NIDDK NIH HHS/ -- R01 DK073490/DK/NIDDK NIH HHS/ -- R01 DK075681/DK/NIDDK NIH HHS/ -- R01 DK075787/DK/NIDDK NIH HHS/ -- R01 HG002651/HG/NHGRI NIH HHS/ -- R01 HL043851/HL/NHLBI NIH HHS/ -- R01 HL059367/HL/NHLBI NIH HHS/ -- R01 HL075366/HL/NHLBI NIH HHS/ -- R01 HL080295/HL/NHLBI NIH HHS/ -- R01 HL086694/HL/NHLBI NIH HHS/ -- R01 HL087641/HL/NHLBI NIH HHS/ -- R01 HL087647/HL/NHLBI NIH HHS/ -- R01 HL087652/HL/NHLBI NIH HHS/ -- R01 HL087676/HL/NHLBI NIH HHS/ -- R01 HL087679/HL/NHLBI NIH HHS/ -- R01 HL105756/HL/NHLBI NIH HHS/ -- R01 LM010098/LM/NLM NIH HHS/ -- R01 MH063706/MH/NIMH NIH HHS/ -- RL1 MH083268/MH/NIMH NIH HHS/ -- U01 DK062418/DK/NIDDK NIH HHS/ -- U01 HG004402/HG/NHGRI NIH HHS/ -- U01 HL054527/HL/NHLBI NIH HHS/ -- U01 HL069757/HL/NHLBI NIH HHS/ -- U01 HL072515/HL/NHLBI NIH HHS/ -- U01 HL084729/HL/NHLBI NIH HHS/ -- U01 HL084756/HL/NHLBI NIH HHS/ -- U54 RR020278/RR/NCRR NIH HHS/ -- UL1 RR033176/RR/NCRR NIH HHS/ -- Z01 HG000024-14/Intramural NIH HHS/ -- England -- Nature. 2012 Oct 11;490(7419):267-72. doi: 10.1038/nature11401. Epub 2012 Sep 16.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of Queensland Diamantina Institute, The University of Queensland, Princess Alexandra Hospital, Brisbane, Queensland 4102, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22982992" target="_blank"〉PubMed〈/a〉
    Keywords: Body Height/genetics ; *Body Mass Index ; Co-Repressor Proteins ; Female ; *Genetic Variation ; Genome-Wide Association Study ; Humans ; Male ; Nerve Tissue Proteins/genetics ; *Phenotype ; Polymorphism, Single Nucleotide ; Proteins/*genetics ; Repressor Proteins/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 33 (1989), S. 293-299 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A novel technique has been developed to immobilize plant cells. The cells are deposited on a surface of manmade fibrous material that provides for strong binding of the plant tissue biomass growing in the submerged culture. The immobilized plant cells remain fully viable. Relatively uniform biomass loadings of up to 20 mg d.w. plant cells/cm2 support material have been attained. All plant cells from the inoculum suspension became attached within the first 24-48 h depending on the support matrix configuration and hydraulic culture conditions. The advantages and scale-up potential of this technique are discussed and compared to other culturing modes.
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 27 (1985), S. 1662-1667 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The influence of bulk-water bacterial cell concentration and specific growth rate history on bacterial adsorption rates to surfaces was investigated using response surface analysis. A pure culture of Pseudomonas sp. 224S was grown in a chemostat and pumped into a continuous flow reactor where the bacteria were exposed to clean, glass surfaces under turbulent flow conditions for a period of six hours. Adsorption rate decreased approximately linearly with increasing specific growth rate history. Glass surfaces became saturated with 224S at ca. 0.1% coverage and the resulting spatial pattern of the adsorbed cells deviated from random in the direction of uniformity.
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 33 (1989), S. 406-414 
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Aerobic glucose metabolism by Pseudomonas aeruginosa biofilms at various calcium loading rates was investigated. The influence of calcium on specific growth rate, extracellular polymeric substance (EPS) formation rate, biofilm detachment rate, and biofilm calcium concentrations was determined. Calcium accumulated in the biofilm in proportion to the liquid phase concentration. Increasing calcium concentration increased the cohesiveness of the biofilm as indicated by a lower relative detachment rate. Specific activity in the biofilm was the same as that measured in a chemostat and was not influenced by changing calcium concentration. EPS formation rate in the biofilm was unaffected by calcium concentration but was higher than that observed in a chemostat.
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  • 6
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Bioluminescence and Chemiluminescence 4 (1989), S. 79-87 
    ISSN: 0884-3996
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
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  • 7
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 5 (1985), S. 1047-1057 
    ISSN: 0271-2091
    Keywords: Transonic Flow ; Modified Potential ; Finite Elements ; Non-isentropic Flow ; Conservative Method ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The classical potential formulation of inviscid transonic flows is modified to account for non-isentropic effects. The density is determined in terms of the speed as well as the pressure, which in turn is calculated from a second-order mixed-type equation derived via differentiating the momentum equations.The present model differs in general from the exact inviscid Euler equations since the flow is assumed irrotational. On the other hand, since the shocks are not isentropic, they are weaker and are placed further upstream compared to the classical potential solution. Furthermore, the streamline leaving the aerofoil does not necessarily bisect the trailing edge.Results for the present conservative calculations are presented for non-lifting and lifting aerofoils at subsonic and transonic speeds and compared to potential and Euler solutions.
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  • 8
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 7 (1987), S. 17-27 
    ISSN: 0271-2091
    Keywords: Finite Element ; Navier-Stokes Stream ; Function Vorticity ; Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The incompressible, two-dimensional Navier-Stokes equations are solved by the finite element method (FEM) using a novel stream function/vorticity formulation. The no-slip solid walls boundary condition is applied by taking advantage of the simple implementation of natural boundary conditions in the FEM, eliminating the need for an iterative evaluation of wall vorticity formulae. In addition, with the proper choice of elements, a stable scheme is constructed allowing convergence to be achieved for all Reynolds numbers, from creeping to inviscid flow, without the traditional need for upwinding and its associated false diffusion. Solutions are presented for a variety of geometries.
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Communications in Applied Numerical Methods 3 (1987), S. 327-333 
    ISSN: 0748-8025
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: In Reference 1, a summary of results of numerical solutions to steady-state laminar flows in an expanding planar channel from 15 research groups was presented. Both vorticity and pressure values computed along a wall of the channel were compared. This paper presents some possible explanations for the wide discrepancies in these computed results.
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Communications in Applied Numerical Methods 5 (1989), S. 159-169 
    ISSN: 0748-8025
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: Boundary approximation solutions using a singular Green function basis have been widely applied to the solution of a variety of linear problems. To avoid the difficulties associated with integration over singularities it is convenient to use sets of non-singular, complete Trefftz functions, and this procedure has been applied recently with success using an indirect formulation. In the paper we observe that direct formulation is here again possible and that for some problems it performs in a superior way.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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