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  • 1
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  The continuous cultivation technique has been used to screen for microorganisms producing d-hydantoinase, a biocatalyst involved in the production of optically active amino acids. Pseudomonas putida strain DSM 84 was used as a model hydantoinase producer to establish selective culture conditions through the addition of various pyrimidines, dihydropyrimidines, hydantoins and 5′-monosubstituted hydantoins. Thymine induced more activity than all cyclic amides tested. Addition of thymine as a non-metabolised inducer at a concentration of 0.05 g l–1 in a continuous culture of P. putida stimulated hydantoinase production up to 80 times the basal level. Using continuous culture conditions established with the model strain, a different strain of P. putida having hydantoinase activity was isolated from commercial mixed cultures of microorganisms. DNA fingerprinting revealed that this new isolate was distinct from strain DSM 84. When used as a probe, the d-hydantoinase gene of strain DSM 84 hybridized with the DNA of the new P. putida isolate.
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  • 2
    ISSN: 1572-9567
    Keywords: directional spectral emissivity ; macroroughness ; microroughness ; mechanical surface treatments ; radiative properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Radiative properties of opaque materials strongly depend on their surface condition. The fabrication of superficial cavities of various forms and dimensions modifies the directional spectral emissivities or absorptivities. They are usually increased compared to those of optically smooth material; the gain depends on the material, the type of cavities, as well as the wavelength λ and the direction Δ of the emitted or incident radiation. When grooves of dimensions larger than λ are fabricated in a sample, the models, taking into account the successive reflections on their inner sides, give a good agreement with experimental data. But a similar theory does not explain the substantial increase of the infrared emissivity of ballblasted samples.
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  • 3
    Publication Date: 2017-11-30
    Description: The Journal of Physical Chemistry B DOI: 10.1021/acs.jpcb.7b08274
    Electronic ISSN: 1520-5207
    Topics: Chemistry and Pharmacology , Physics
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  • 4
    Publication Date: 2017-12-06
    Description: ACS Sustainable Chemistry & Engineering DOI: 10.1021/acssuschemeng.7b03655
    Electronic ISSN: 2168-0485
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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  • 5
    Publication Date: 2014-11-11
    Description: Biotin-dependent carboxylases are widely distributed in nature and have important functions in the metabolism of fatty acids, amino acids, carbohydrates, cholesterol and other compounds. Defective mutations in several of these enzymes have been linked to serious metabolic diseases in humans, and acetyl-CoA carboxylase is a target for drug discovery in the treatment of diabetes, cancer and other diseases. Here we report the identification and biochemical, structural and functional characterizations of a novel single-chain (120 kDa), multi-domain biotin-dependent carboxylase in bacteria. It has preference for long-chain acyl-CoA substrates, although it is also active towards short-chain and medium-chain acyl-CoAs, and we have named it long-chain acyl-CoA carboxylase. The holoenzyme is a homo-hexamer with molecular mass of 720 kDa. The 3.0 A crystal structure of the long-chain acyl-CoA carboxylase holoenzyme from Mycobacterium avium subspecies paratuberculosis revealed an architecture that is strikingly different from those of related biotin-dependent carboxylases. In addition, the domains of each monomer have no direct contact with each other. They are instead extensively swapped in the holoenzyme, such that one cycle of catalysis involves the participation of four monomers. Functional studies in Pseudomonas aeruginosa suggest that the enzyme is involved in the utilization of selected carbon and nitrogen sources.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4319993/" 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/PMC4319993/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tran, Timothy H -- Hsiao, Yu-Shan -- Jo, Jeanyoung -- Chou, Chi-Yuan -- Dietrich, Lars E P -- Walz, Thomas -- Tong, Liang -- 1S10RR028832/RR/NCRR NIH HHS/ -- P01 GM062580/GM/NIGMS NIH HHS/ -- R01 AI103369/AI/NIAID NIH HHS/ -- R01AI103369/AI/NIAID NIH HHS/ -- R01DK067238/DK/NIDDK NIH HHS/ -- S10OD012018/OD/NIH HHS/ -- T32 GM008798/GM/NIGMS NIH HHS/ -- U54GM094597/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 Feb 5;518(7537):120-4. doi: 10.1038/nature13912. Epub 2014 Nov 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biological Sciences, Columbia University, New York, New York 10027, USA. ; Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA. ; 1] Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA [2] Howard Hughes Medical Institute, Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25383525" target="_blank"〉PubMed〈/a〉
    Keywords: Acyl Coenzyme A/metabolism ; Biocatalysis ; Biotin/metabolism ; Carbon/metabolism ; Carbon-Carbon Ligases/*chemistry/*metabolism/ultrastructure ; Cryoelectron Microscopy ; Crystallography, X-Ray ; Holoenzymes/chemistry/metabolism ; Models, Molecular ; Mycobacterium avium subsp. paratuberculosis/*enzymology ; Nitrogen/metabolism ; Protein Structure, Tertiary ; Protein Subunits/chemistry/metabolism ; Pseudomonas aeruginosa/enzymology/genetics/metabolism ; Structure-Activity Relationship
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 6
    Publication Date: 2002-04-20
    Description: The signaling pathway from phosphoinositide 3-kinase to the protein kinase Akt controls organismal life-span in invertebrates and cell survival and proliferation in mammals by inhibiting the activity of members of the FOXO family of transcription factors. We show that mammalian FOXO3a also functions at the G2 to M checkpoint in the cell cycle and triggers the repair of damaged DNA. By gene array analysis, FOXO3a was found to modulate the expression of several genes that regulate the cellular response to stress at the G2-M checkpoint. The growth arrest and DNA damage response gene Gadd45a appeared to be a direct target of FOXO3a that mediates part of FOXO3a's effects on DNA repair. These findings indicate that in mammals FOXO3a regulates the resistance of cells to stress by inducing DNA repair and thereby may also affect organismal life-span.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tran, Hien -- Brunet, Anne -- Grenier, Jill M -- Datta, Sandeep R -- Fornace, Albert J Jr -- DiStefano, Peter S -- Chiang, Lillian W -- Greenberg, Michael E -- NIHP30-HD18655/HD/NICHD NIH HHS/ -- P01-HD24926/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 2002 Apr 19;296(5567):530-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neuroscience, Children's Hospital and Department of Neurobiology, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11964479" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Line ; Chromones/pharmacology ; DNA Damage ; *DNA Repair ; DNA-Binding Proteins/genetics/*metabolism ; Forkhead Transcription Factors ; G2 Phase ; Gene Expression Profiling ; Gene Expression Regulation ; Genes, Reporter ; Humans ; Intracellular Signaling Peptides and Proteins ; Mitosis ; Morpholines/pharmacology ; Promoter Regions, Genetic ; Proteins/genetics/*metabolism ; Rats ; Recombinant Fusion Proteins/metabolism ; Tamoxifen/*analogs & derivatives/pharmacology ; Transcription Factors/genetics/*metabolism ; Transfection ; Ultraviolet Rays
    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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  • 7
    Publication Date: 2005-09-10
    Description: On 4 July 2005, many observatories around the world and in space observed the collision of Deep Impact with comet 9P/Tempel 1 or its aftermath. This was an unprecedented coordinated observational campaign. These data show that (i) there was new material after impact that was compositionally different from that seen before impact; (ii) the ratio of dust mass to gas mass in the ejecta was much larger than before impact; (iii) the new activity did not last more than a few days, and by 9 July the comet's behavior was indistinguishable from its pre-impact behavior; and (iv) there were interesting transient phenomena that may be correlated with cratering physics.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Meech, K J -- Ageorges, N -- A'Hearn, M F -- Arpigny, C -- Ates, A -- Aycock, J -- Bagnulo, S -- Bailey, J -- Barber, R -- Barrera, L -- Barrena, R -- Bauer, J M -- Belton, M J S -- Bensch, F -- Bhattacharya, B -- Biver, N -- Blake, G -- Bockelee-Morvan, D -- Boehnhardt, H -- Bonev, B P -- Bonev, T -- Buie, M W -- Burton, M G -- Butner, H M -- Cabanac, R -- Campbell, R -- Campins, H -- Capria, M T -- Carroll, T -- Chaffee, F -- Charnley, S B -- Cleis, R -- Coates, A -- Cochran, A -- Colom, P -- Conrad, A -- Coulson, I M -- Crovisier, J -- deBuizer, J -- Dekany, R -- de Leon, J -- Dello Russo, N -- Delsanti, A -- DiSanti, M -- Drummond, J -- Dundon, L -- Etzel, P B -- Farnham, T L -- Feldman, P -- Fernandez, Y R -- Filipovic, M D -- Fisher, S -- Fitzsimmons, A -- Fong, D -- Fugate, R -- Fujiwara, H -- Fujiyoshi, T -- Furusho, R -- Fuse, T -- Gibb, E -- Groussin, O -- Gulkis, S -- Gurwell, M -- Hadamcik, E -- Hainaut, O -- Harker, D -- Harrington, D -- Harwit, M -- Hasegawa, S -- Hergenrother, C W -- Hirst, P -- Hodapp, K -- Honda, M -- Howell, E S -- Hutsemekers, D -- Iono, D -- Ip, W-H -- Jackson, W -- Jehin, E -- Jiang, Z J -- Jones, G H -- Jones, P A -- Kadono, T -- Kamath, U W -- Kaufl, H U -- Kasuga, T -- Kawakita, H -- Kelley, M S -- Kerber, F -- Kidger, M -- Kinoshita, D -- Knight, M -- Lara, L -- Larson, S M -- Lederer, S -- Lee, C-F -- Levasseur-Regourd, A C -- Li, J Y -- Li, Q-S -- Licandro, J -- Lin, Z-Y -- Lisse, C M -- LoCurto, G -- Lovell, A J -- Lowry, S C -- Lyke, J -- Lynch, D -- Ma, J -- Magee-Sauer, K -- Maheswar, G -- Manfroid, J -- Marco, O -- Martin, P -- Melnick, G -- Miller, S -- Miyata, T -- Moriarty-Schieven, G H -- Moskovitz, N -- Mueller, B E A -- Mumma, M J -- Muneer, S -- Neufeld, D A -- Ootsubo, T -- Osip, D -- Pandea, S K -- Pantin, E -- Paterno-Mahler, R -- Patten, B -- Penprase, B E -- Peck, A -- Petitas, G -- Pinilla-Alonso, N -- Pittichova, J -- Pompei, E -- Prabhu, T P -- Qi, C -- Rao, R -- Rauer, H -- Reitsema, H -- Rodgers, S D -- Rodriguez, P -- Ruane, R -- Ruch, G -- Rujopakarn, W -- Sahu, D K -- Sako, S -- Sakon, I -- Samarasinha, N -- Sarkissian, J M -- Saviane, I -- Schirmer, M -- Schultz, P -- Schulz, R -- Seitzer, P -- Sekiguchi, T -- Selman, F -- Serra-Ricart, M -- Sharp, R -- Snell, R L -- Snodgrass, C -- Stallard, T -- Stecklein, G -- Sterken, C -- Stuwe, J A -- Sugita, S -- Sumner, M -- Suntzeff, N -- Swaters, R -- Takakuwa, S -- Takato, N -- Thomas-Osip, J -- Thompson, E -- Tokunaga, A T -- Tozzi, G P -- Tran, H -- Troy, M -- Trujillo, C -- Van Cleve, J -- Vasundhara, R -- Vazquez, R -- Vilas, F -- Villanueva, G -- von Braun, K -- Vora, P -- Wainscoat, R J -- Walsh, K -- Watanabe, J -- Weaver, H A -- Weaver, W -- Weiler, M -- Weissman, P R -- Welsh, W F -- Wilner, D -- Wolk, S -- Womack, M -- Wooden, D -- Woodney, L M -- Woodward, C -- Wu, Z-Y -- Wu, J-H -- Yamashita, T -- Yang, B -- Yang, Y-B -- Yokogawa, S -- Zook, A C -- Zauderer, A -- Zhao, X -- Zhou, X -- Zucconi, J-M -- New York, N.Y. -- Science. 2005 Oct 14;310(5746):265-9. Epub 2005 Sep 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Astronomy, University of Hawaii at Manoa, 2680 Woodlawn Drive, Honolulu, HI 96822, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16150977" target="_blank"〉PubMed〈/a〉
    Keywords: Cosmic Dust ; Jupiter ; *Meteoroids ; Organic Chemicals ; Photometry
    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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  • 8
    Publication Date: 2012-04-28
    Description: Immunoglobulin A (IgA) is essential to maintain the symbiotic balance between gut bacterial communities and the host immune system. Here we provide evidence that the inhibitory co-receptor programmed cell death-1 (PD-1) regulates the gut microbiota through appropriate selection of IgA plasma cell repertoires. PD-1 deficiency generates an excess number of T follicular helper (T(FH)) cells with altered phenotypes, which results in dysregulated selection of IgA precursor cells in the germinal center of Peyer's patches. Consequently, the IgAs produced in PD-1-deficient mice have reduced bacteria-binding capacity, which causes alterations of microbial communities in the gut. Thus, PD-1 plays a critical role in regulation of antibody diversification required for the maintenance of intact mucosal barrier.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kawamoto, Shimpei -- Tran, Thinh H -- Maruya, Mikako -- Suzuki, Keiichiro -- Doi, Yasuko -- Tsutsui, Yumi -- Kato, Lucia M -- Fagarasan, Sidonia -- New York, N.Y. -- Science. 2012 Apr 27;336(6080):485-9. doi: 10.1126/science.1217718.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory for Mucosal Immunity, Research Center for Allergy and Immunology, RIKEN Yokohama, Tsurumi, Yokohama, Japan.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22539724" target="_blank"〉PubMed〈/a〉
    Keywords: Adoptive Transfer ; Animals ; B-Lymphocytes/*immunology ; Bacteria/immunology ; Bacterial Load ; *Bacterial Physiological Phenomena ; Feces/microbiology ; Genes, Immunoglobulin Heavy Chain ; Germinal Center/cytology/immunology ; Immunoglobulin A/biosynthesis/*immunology ; Intestinal Mucosa/*immunology ; Intestine, Small/immunology/*microbiology ; Lymphocyte Count ; Mice ; Peyer's Patches/cytology/immunology ; Plasma Cells/immunology/physiology ; Programmed Cell Death 1 Receptor/genetics/*physiology ; Symbiosis ; T-Lymphocytes, Helper-Inducer/*immunology
    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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  • 9
    Publication Date: 2013-11-02
    Description: Heterostructures based on layering of two-dimensional (2D) materials such as graphene and hexagonal boron nitride represent a new class of electronic devices. Realizing this potential, however, depends critically on the ability to make high-quality electrical contact. Here, we report a contact geometry in which we metalize only the 1D edge of a 2D graphene layer. In addition to outperforming conventional surface contacts, the edge-contact geometry allows a complete separation of the layer assembly and contact metallization processes. In graphene heterostructures, this enables high electronic performance, including low-temperature ballistic transport over distances longer than 15 micrometers, and room-temperature mobility comparable to the theoretical phonon-scattering limit. The edge-contact geometry provides new design possibilities for multilayered structures of complimentary 2D materials.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wang, L -- Meric, I -- Huang, P Y -- Gao, Q -- Gao, Y -- Tran, H -- Taniguchi, T -- Watanabe, K -- Campos, L M -- Muller, D A -- Guo, J -- Kim, P -- Hone, J -- Shepard, K L -- Dean, C R -- New York, N.Y. -- Science. 2013 Nov 1;342(6158):614-7. doi: 10.1126/science.1244358.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Electrical Engineering, Columbia University, New York, NY 10027, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24179223" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 10
    Publication Date: 2004-02-21
    Description: The Sir2 deacetylase modulates organismal life-span in various species. However, the molecular mechanisms by which Sir2 increases longevity are largely unknown. We show that in mammalian cells, the Sir2 homolog SIRT1 appears to control the cellular response to stress by regulating the FOXO family of Forkhead transcription factors, a family of proteins that function as sensors of the insulin signaling pathway and as regulators of organismal longevity. SIRT1 and the FOXO transcription factor FOXO3 formed a complex in cells in response to oxidative stress, and SIRT1 deacetylated FOXO3 in vitro and within cells. SIRT1 had a dual effect on FOXO3 function: SIRT1 increased FOXO3's ability to induce cell cycle arrest and resistance to oxidative stress but inhibited FOXO3's ability to induce cell death. Thus, one way in which members of the Sir2 family of proteins may increase organismal longevity is by tipping FOXO-dependent responses away from apoptosis and toward stress resistance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brunet, Anne -- Sweeney, Lora B -- Sturgill, J Fitzhugh -- Chua, Katrin F -- Greer, Paul L -- Lin, Yingxi -- Tran, Hien -- Ross, Sarah E -- Mostoslavsky, Raul -- Cohen, Haim Y -- Hu, Linda S -- Cheng, Hwei-Ling -- Jedrychowski, Mark P -- Gygi, Steven P -- Sinclair, David A -- Alt, Frederick W -- Greenberg, Michael E -- NIHP30-HD18655/HD/NICHD NIH HHS/ -- P01 NS35138-17/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 2004 Mar 26;303(5666):2011-5. Epub 2004 Feb 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Neuroscience, Children's Hospital, and Department of Neurobiology, Center for Blood Research (CBR) Institute for Biomedical Research, Harvard Medical School, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14976264" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Animals ; Apoptosis ; Cell Cycle ; Cell Line ; Cell Nucleus/metabolism ; Cells, Cultured ; Cerebellum/cytology ; Forkhead Transcription Factors ; Gene Expression Profiling ; Gene Expression Regulation ; Histone Deacetylases/genetics/*metabolism ; Humans ; Intracellular Signaling Peptides and Proteins ; Mice ; Mice, Knockout ; Neurons/cytology ; *Oxidative Stress ; Phosphorylation ; Proteins/genetics ; Recombinant Proteins/metabolism ; Sirtuin 1 ; Sirtuins/genetics/*metabolism ; Transcription Factors/genetics/*metabolism ; Transcription, Genetic
    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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