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  • 1
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    Unbekannt
    Kluwer
    In:  Dordrecht, 206 pp., Kluwer, vol. 138, no. 2, pp. 125-169, (ISBN 0-7923-5034-0)
    Publikationsdatum: 1998
    Schlagwort(e): Earthquake hazard ; Seismicity ; storms ; Project report/description ; Earthquake engineering, engineering seismology
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 2013-10-02
    Beschreibung: Cyclostomes, comprising jawless vertebrates such as lampreys and hagfishes, are the sister group of living jawed vertebrates (gnathostomes) and hence an important group for understanding the origin and diversity of vertebrates. In vertebrates and other metazoans, Hox genes determine cell fate along the anteroposterior axis of embryos and are implicated...
    Print ISSN: 0027-8424
    Digitale ISSN: 1091-6490
    Thema: Biologie , Medizin , Allgemeine Naturwissenschaft
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Publikationsdatum: 2016-02-09
    Beschreibung: Gd-doped ZnO thin films were prepared using pulsed laser deposition at different oxygen pressures and varied Gd concentrations. The effects of oxygen deficiency-related defects on the Gd incorporation, optical and structural properties, were explored by studying the impact of oxygen pressure during deposition and post-growth thermal annealing in vacuum. Rutherford Backscattering Spectrometry revealed that the Gd concentration increases with increasing oxygen pressure for samples grown with the same Gd-doped ZnO target. Unexpectedly, the c -lattice parameter of the samples tends to decrease with increasing Gd concentration, suggesting that Gd-defect complexes play an important role in the structural properties. Using low-temperature photoluminescence (PL), Raman measurements and density functional theory calculations, we identified oxygen vacancies as the dominant intrinsic point defects. PL spectra show a defect band related to oxygen vacancies for samples grown at oxygen deficiency.
    Print ISSN: 0021-8979
    Digitale ISSN: 1089-7550
    Thema: Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Publikationsdatum: 2015-11-18
    Beschreibung: The human gut contains a microbial community composed of tens of trillions of organisms that normally assemble during the first 2–3 y of postnatal life. We propose that brain development needs to be viewed in the context of the developmental biology of this “microbial organ” and its capacity to metabolize...
    Schlagwort(e): 100th Anniversary
    Print ISSN: 0027-8424
    Digitale ISSN: 1091-6490
    Thema: Biologie , Medizin , Allgemeine Naturwissenschaft
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Publikationsdatum: 2016-01-24
    Beschreibung: The brain, comprising billions of neurons and intricate neural networks, is arguably the most complex organ in vertebrates. The diversity of individual neurons is fundamental to the neuronal network complexity and the overall function of the vertebrate brain. In jawed vertebrates, clustered protocadherins provide the molecular basis for this neuronal diversity, through stochastic and combinatorial expression of their various isoforms in individual neurons. Based on analyses of transcriptomes from the Japanese lamprey brain and sea lamprey embryos, genome assemblies of the two lampreys, and brain expressed sequence tags of the inshore hagfish, we show that extant jawless vertebrates (cyclostomes) lack the clustered protocadherins. Our findings indicate that the clustered protocadherins originated from a nonclustered protocadherin in the jawed vertebrate ancestor, after the two rounds of whole-genome duplication. In the absence of clustered protocadherins, cyclostomes might have evolved novel molecules or mechanisms for generating neuronal diversity which remains to be discovered.
    Print ISSN: 0737-4038
    Digitale ISSN: 1537-1719
    Thema: Biologie
    Publiziert von Oxford University Press
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Publikationsdatum: 2019
    Beschreibung: 〈p〉The mineralocorticoid receptor (MR) is a nuclear receptor and part of a large and diverse family of transcription factors that also includes receptors for glucocorticoids, progesterone, androgens, and estrogens. The corticosteroid aldosterone is the physiological activator of the MR in humans and other terrestrial vertebrates; however, its activator is not known in cartilaginous fish, the oldest group of extant jawed vertebrates. Here, we analyzed the ability of corticosteroids and progesterone to activate the full-length MR from the elephant shark (〈i〉Callorhinchus milii〈/i〉). On the basis of their measured activities, aldosterone, cortisol, 11-deoxycorticosterone, corticosterone, 11-deoxcortisol, progesterone, and 19-norprogesterone are potential physiological mineralocorticoids. However, aldosterone, the physiological mineralocorticoid in humans and other terrestrial vertebrates, is not found in cartilaginous or ray-finned fish. Although progesterone activates MRs in ray-finned fish, progesterone does not activate MRs in humans, amphibians, or alligator, suggesting that during the transition to terrestrial vertebrates, progesterone lost the ability to activate the MR. Both elephant shark MR and human MR are expressed in the brain, heart, ovary, testis, and other nonepithelial tissues, suggesting that MR expression in diverse tissues evolved in the common ancestor of jawed vertebrates. Our data suggest that 19-norprogesterone– and progesterone-activated MR may have unappreciated functions in reproductive physiology.〈/p〉
    Print ISSN: 1945-0877
    Digitale ISSN: 1937-9145
    Thema: Biologie , Medizin
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Publikationsdatum: 2012-08-24
    Beschreibung: Set2-mediated methylation of histone H3 at Lys 36 (H3K36me) is a co-transcriptional event that is necessary for the activation of the Rpd3S histone deacetylase complex, thereby maintaining the coding region of genes in a hypoacetylated state. In the absence of Set2, H3K36 or Rpd3S acetylated histones accumulate on open reading frames (ORFs), leading to transcription initiation from cryptic promoters within ORFs. Although the co-transcriptional deacetylation pathway is well characterized, the factors responsible for acetylation are as yet unknown. Here we show that, in yeast, co-transcriptional acetylation is achieved in part by histone exchange over ORFs. In addition to its function of targeting and activating the Rpd3S complex, H3K36 methylation suppresses the interaction of H3 with histone chaperones, histone exchange over coding regions and the incorporation of new acetylated histones. Thus, Set2 functions both to suppress the incorporation of acetylated histones and to signal for the deacetylation of these histones in transcribed genes. By suppressing spurious cryptic transcripts from initiating within ORFs, this pathway is essential to maintain the accuracy of transcription by RNA polymerase II.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Venkatesh, Swaminathan -- Smolle, Michaela -- Li, Hua -- Gogol, Madelaine M -- Saint, Malika -- Kumar, Shambhu -- Natarajan, Krishnamurthy -- Workman, Jerry L -- R01GM04867/GM/NIGMS NIH HHS/ -- England -- Nature. 2012 Sep 20;489(7416):452-5. doi: 10.1038/nature11326. Epub 2012 Aug 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Stowers Institute for Medical Research, 1000 E. 50th Street, Kansas City, Missouri 64110, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22914091" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acetylation ; Cell Cycle Proteins/metabolism ; Genes, Fungal/*genetics ; Histones/chemistry/*metabolism ; Lysine/*metabolism ; Methylation ; Methyltransferases/deficiency/genetics/*metabolism ; Molecular Chaperones/metabolism ; Open Reading Frames/genetics ; Phenotype ; RNA Polymerase II/metabolism ; Saccharomyces cerevisiae/*genetics ; Saccharomyces cerevisiae Proteins/*genetics/metabolism ; Transcription, Genetic/*genetics
    Print ISSN: 0028-0836
    Digitale ISSN: 1476-4687
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 8
    Publikationsdatum: 2013-07-05
    Beschreibung: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Venkatesh, Swaminathan -- Workman, Jerry L -- Wahlgren, Mats -- Bejarano, Maria Teresa -- England -- Nature. 2013 Jul 11;499(7457):156-7. doi: 10.1038/nature12407. Epub 2013 Jul 3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23823720" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): *Gene Silencing ; Histones/*metabolism ; Plasmodium falciparum/*genetics/*pathogenicity ; Protozoan Proteins/genetics/*metabolism ; Virulence Factors/*genetics
    Print ISSN: 0028-0836
    Digitale ISSN: 1476-4687
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
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  • 9
    Publikationsdatum: 2013-06-21
    Beschreibung: In the Drosophila optic lobes, the medulla processes visual information coming from inner photoreceptors R7 and R8 and from lamina neurons. It contains approximately 40,000 neurons belonging to more than 70 different types. Here we describe how precise temporal patterning of neural progenitors generates these different neural types. Five transcription factors-Homothorax, Eyeless, Sloppy paired, Dichaete and Tailless-are sequentially expressed in a temporal cascade in each of the medulla neuroblasts as they age. Loss of Eyeless, Sloppy paired or Dichaete blocks further progression of the temporal sequence. We provide evidence that this temporal sequence in neuroblasts, together with Notch-dependent binary fate choice, controls the diversification of the neuronal progeny. Although a temporal sequence of transcription factors had been identified in Drosophila embryonic neuroblasts, our work illustrates the generality of this strategy, with different sequences of transcription factors being used in different contexts.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3701960/" 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/PMC3701960/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Xin -- Erclik, Ted -- Bertet, Claire -- Chen, Zhenqing -- Voutev, Roumen -- Venkatesh, Srinidhi -- Morante, Javier -- Celik, Arzu -- Desplan, Claude -- GM058575/GM/NIGMS NIH HHS/ -- R01 EY017916/EY/NEI NIH HHS/ -- Canadian Institutes of Health Research/Canada -- England -- Nature. 2013 Jun 27;498(7455):456-62. doi: 10.1038/nature12319. Epub 2013 Jun 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Biology, New York University, 100 Washington Square East, New York, New York 10003, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23783517" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Brain/*cytology/growth & development ; *Cell Differentiation ; *Cell Lineage ; Drosophila Proteins/metabolism ; Drosophila melanogaster/anatomy & histology/*cytology/metabolism ; Female ; Gene Expression Regulation ; Male ; Neural Stem Cells/*cytology/metabolism ; Neurons/*cytology/*metabolism ; Time Factors ; Transcription Factors/metabolism ; Visual Pathways/cytology
    Print ISSN: 0028-0836
    Digitale ISSN: 1476-4687
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Publikationsdatum: 2016-02-26
    Beschreibung: Undernourished children exhibit impaired development of their gut microbiota. Transplanting microbiota from 6- and 18-month-old healthy or undernourished Malawian donors into young germ-free mice that were fed a Malawian diet revealed that immature microbiota from undernourished infants and children transmit impaired growth phenotypes. The representation of several age-discriminatory taxa in recipient animals correlated with lean body mass gain; liver, muscle, and brain metabolism; and bone morphology. Mice were cohoused shortly after receiving microbiota from healthy or severely stunted and underweight infants; age- and growth-discriminatory taxa from the microbiota of the former were able to invade that of the latter, which prevented growth impairments in recipient animals. Adding two invasive species, Ruminococcus gnavus and Clostridium symbiosum, to the microbiota from undernourished donors also ameliorated growth and metabolic abnormalities in recipient animals. These results provide evidence that microbiota immaturity is causally related to undernutrition and reveal potential therapeutic targets and agents.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4787260/" 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/PMC4787260/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Blanton, Laura V -- Charbonneau, Mark R -- Salih, Tarek -- Barratt, Michael J -- Venkatesh, Siddarth -- Ilkaveya, Olga -- Subramanian, Sathish -- Manary, Mark J -- Trehan, Indi -- Jorgensen, Josh M -- Fan, Yue-Mei -- Henrissat, Bernard -- Leyn, Semen A -- Rodionov, Dmitry A -- Osterman, Andrei L -- Maleta, Kenneth M -- Newgard, Christopher B -- Ashorn, Per -- Dewey, Kathryn G -- Gordon, Jeffrey I -- R37 DK030292/DK/NIDDK NIH HHS/ -- T32 AI007172/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2016 Feb 19;351(6275). pii: aad3311. doi: 10.1126/science.aad3311.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Genome Sciences and Systems Biology and Center for Gut Microbiome and Nutrition Research, Washington University School of Medicine, St. Louis, MO 63108, USA. ; Sarah W. Stedman Nutrition and Metabolism Centerand Duke Molecular Physiology Institute, Duke University Medical Center, Durham, NC 27710, USA. ; Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA. School of Public Health and Family Medicine, College of Medicine, University of Malawi, Chichiri, Blantyre 3, Malawi. ; Department of Pediatrics, Washington University School of Medicine, St. Louis, MO 63110, USA. Department of Paediatrics and Child Health, College of Medicine, University of Malawi, Chichiri, Blantyre 3, Malawi. ; Department of Nutrition and Program in International and Community Nutrition, University of California-Davis, Davis, CA 95616, USA. ; Department for International Health, University of Tampere School of Medicine, Tampere 33014, Finland. ; Architecture et Fonction des Macromolecules Biologiques, Centre National de la Recherche Scientifique and Aix-Marseille Universite, 13288 Marseille Cedex 9, France. Department of Biological Sciences, King Abdulaziz University, Jeddah, Saudi Arabia. ; A. A. Kharkevich Institute for Information Transmission Problems, Russian Academy of Sciences, Moscow 127994, Russia. ; A. A. Kharkevich Institute for Information Transmission Problems, Russian Academy of Sciences, Moscow 127994, Russia. Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA. ; Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA. ; School of Public Health and Family Medicine, College of Medicine, University of Malawi, Chichiri, Blantyre 3, Malawi. ; Sarah W. Stedman Nutrition and Metabolism Centerand Duke Molecular Physiology Institute, Duke University Medical Center, Durham, NC 27710, USA. Department of Pharmacology and Cancer Biology and Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA. ; Department for International Health, University of Tampere School of Medicine, Tampere 33014, Finland. Department of Pediatrics, Tampere University Hospital, Tampere 33521, Finland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26912898" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Bacteria/*classification ; Bifidobacterium/physiology ; Body Weight ; Bone Development ; Clostridiales/physiology ; Disease Models, Animal ; Feces/microbiology ; Femur/growth & development ; Gastrointestinal Microbiome/*physiology ; Germ-Free Life ; Humans ; Infant ; Infant Nutrition Disorders/metabolism/*microbiology ; Malawi ; Male ; Mice ; Mice, Inbred C57BL
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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