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  • 1
    Publication Date: 2016-06-26
    Description: The excavation damaged zone (EDZ) around the backfilled tunnels of a geological repository represents a possible release path for radionuclides, corrosion and degradation gases that needs to be adequately addressed by safety assessment (SA) modelling tools. The hydromechanical phenomena associated with the creation and temporal evolution of the EDZ are of high complexity, precluding detailed representations of the EDZ in conventional SA. Thus, simplified EDZ models mimicking the safety-relevant features of the EDZ are required. In this context, a heuristic modelling approach has been developed to represent the creation and evolution of the EDZ in an abstracted and simplified manner. The key features addressed are the stochastic character of the excavation-induced fracture network and the self-sealing processes associated with the re-saturation after backfilling of the tunnels. The approach has been applied to a range of generic repository settings to investigate the impact of repository depth and in situ conditions on the hydraulic significance of the EDZ after repository closure. The model has been benchmarked with a dataset from a self-sealing experiment at the Mont Terri underground rock laboratory (URL), demonstrating the ability of the approach to mimic the evolution of the hydraulic significance of the EDZ during the re-saturation phase.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
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  • 2
    Publication Date: 2015-01-23
    Description: Cuprous oxide films have been deposited on quartz substrates by a sol-gel method under various annealing temperatures. The X-ray diffraction analysis and Raman scattering show that all the films are of pure Cu 2 O phase. From comparison of photoluminescence with 488 and 325 nm laser excitations, the electronic transition energies and intensities present the annealing-temperature dependent behavior. The electronic band structures of the Cu 2 O film annealed at 800 °C, especially for the contribution of exciton series and high energy transitions, have been investigated by temperature dependent transmittance. The extracted refraction index and the high frequency dielectric constant both abruptly decrease until the temperature rises up to 100 K. Six transitions can be clearly identified and the red shift trend of E o3 - E o5 transition energies with increasing the temperature can be found. Moreover, the anomalous behavior takes place at about 200 K from the E o6 transition. The singularities indicate that the change in the crystalline and electronic band structure occurs as the temperature near 100 K and 200 K for the film.
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
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  • 3
    Publication Date: 2012-01-18
    Description: Using ultralow light intensities that are well suited for investigating biological samples, we demonstrate whole-cell superresolution imaging by nonlinear structured-illumination microscopy. Structured-illumination microscopy can increase the spatial resolution of a wide-field light microscope by a factor of two, with greater resolution extension possible if the emission rate of the sample responds nonlinearly to the illumination intensity. Saturating the fluorophore excited state is one such nonlinear response, and a realization of this idea, saturated structured-illumination microscopy, has achieved approximately 50-nm resolution on dye-filled polystyrene beads. Unfortunately, because saturation requires extremely high light intensities that are likely to accelerate photobleaching and damage even fixed tissue, this implementation is of limited use for studying biological samples. Here, reversible photoswitching of a fluorescent protein provides the required nonlinearity at light intensities six orders of magnitude lower than those needed for saturation. We experimentally demonstrate approximately 40-nm resolution on purified microtubules labeled with the fluorescent photoswitchable protein Dronpa, and we visualize cellular structures by imaging the mammalian nuclear pore and actin cytoskeleton. As a result, nonlinear structured-illumination microscopy is now a biologically compatible superresolution imaging method.
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 4
    Publication Date: 2014-02-05
    Description: Many of the long-term effects of cocaine on the brain’s reward circuitry have been shown to be mediated by alterations in gene expression. Several chromatin modifications, including histone acetylation and methylation, have been implicated in this regulation, but the effect of other histone modifications remains poorly understood. Poly(ADP-ribose) polymerase-1 (PARP-1),...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 5
    Publication Date: 2009-08-29
    Description: A single-base pair resolution silkworm genetic variation map was constructed from 40 domesticated and wild silkworms, each sequenced to approximately threefold coverage, representing 99.88% of the genome. We identified ~16 million single-nucleotide polymorphisms, many indels, and structural variations. We find that the domesticated silkworms are clearly genetically differentiated from the wild ones, but they have maintained large levels of genetic variability, suggesting a short domestication event involving a large number of individuals. We also identified signals of selection at 354 candidate genes that may have been important during domestication, some of which have enriched expression in the silk gland, midgut, and testis. These data add to our understanding of the domestication processes and may have applications in devising pest control strategies and advancing the use of silkworms as efficient bioreactors.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3951477/" 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/PMC3951477/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Xia, Qingyou -- Guo, Yiran -- Zhang, Ze -- Li, Dong -- Xuan, Zhaoling -- Li, Zhuo -- Dai, Fangyin -- Li, Yingrui -- Cheng, Daojun -- Li, Ruiqiang -- Cheng, Tingcai -- Jiang, Tao -- Becquet, Celine -- Xu, Xun -- Liu, Chun -- Zha, Xingfu -- Fan, Wei -- Lin, Ying -- Shen, Yihong -- Jiang, Lan -- Jensen, Jeffrey -- Hellmann, Ines -- Tang, Si -- Zhao, Ping -- Xu, Hanfu -- Yu, Chang -- Zhang, Guojie -- Li, Jun -- Cao, Jianjun -- Liu, Shiping -- He, Ningjia -- Zhou, Yan -- Liu, Hui -- Zhao, Jing -- Ye, Chen -- Du, Zhouhe -- Pan, Guoqing -- Zhao, Aichun -- Shao, Haojing -- Zeng, Wei -- Wu, Ping -- Li, Chunfeng -- Pan, Minhui -- Li, Jingjing -- Yin, Xuyang -- Li, Dawei -- Wang, Juan -- Zheng, Huisong -- Wang, Wen -- Zhang, Xiuqing -- Li, Songgang -- Yang, Huanming -- Lu, Cheng -- Nielsen, Rasmus -- Zhou, Zeyang -- Wang, Jian -- Xiang, Zhonghuai -- Wang, Jun -- R01 HG003229/HG/NHGRI NIH HHS/ -- R01 HG003229-05/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2009 Oct 16;326(5951):433-6. doi: 10.1126/science.1176620. Epub 2009 Aug 27.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Key Sericultural Laboratory of Agricultural Ministry, College of Biotechnology, Southwest University, Chongqing 400715, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19713493" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bombyx/classification/*genetics ; Digestive System/metabolism ; Exocrine Glands/metabolism ; Female ; Gene Expression ; *Genes, Insect ; *Genetic Variation ; *Genome, Insect ; INDEL Mutation ; Linkage Disequilibrium ; Male ; Phylogeny ; Polymorphism, Single Nucleotide ; Principal Component Analysis ; Selection, Genetic ; *Sequence Analysis, DNA ; Testis/metabolism
    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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  • 6
    Publication Date: 2003-02-08
    Description: We report the design and total chemical synthesis of "synthetic erythropoiesis protein" (SEP), a 51-kilodalton protein-polymer construct consisting of a 166-amino-acid polypeptide chain and two covalently attached, branched, and monodisperse polymer moieties that are negatively charged. The ability to control the chemistry allowed us to synthesize a macromolecule of precisely defined covalent structure. SEP was homogeneous as shown by high-resolution analytical techniques, with a mass of 50,825 +/-10 daltons by electrospray mass spectrometry, and with a pI of 5.0. In cell and animal assays for erythropoiesis, SEP displayed potent biological activity and had significantly prolonged duration of action in vivo. These chemical methods are a powerful tool in the rational design of protein constructs with potential therapeutic applications.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kochendoerfer, Gerd G -- Chen, Shiah-Yun -- Mao, Feng -- Cressman, Sonya -- Traviglia, Stacey -- Shao, Haiyan -- Hunter, Christie L -- Low, Donald W -- Cagle, E Neil -- Carnevali, Maia -- Gueriguian, Vincent -- Keogh, Peter J -- Porter, Heather -- Stratton, Stephen M -- Wiedeke, M Con -- Wilken, Jill -- Tang, Jie -- Levy, Jay J -- Miranda, Les P -- Crnogorac, Milan M -- Kalbag, Suresh -- Botti, Paolo -- Schindler-Horvat, Janice -- Savatski, Laura -- Adamson, John W -- Kung, Ada -- Kent, Stephen B H -- Bradburne, James A -- New York, N.Y. -- Science. 2003 Feb 7;299(5608):884-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Gryphon Therapeutics, 250 East Grand Avenue, Suite 90, South San Francisco, CA 94080, USA. Gkochendoerfer@gryphonRX.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12574628" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cell Line ; Circular Dichroism ; *Drug Design ; Drug Stability ; Electrophoresis, Polyacrylamide Gel ; *Erythropoiesis ; Erythropoietin/chemistry/pharmacology ; Hematocrit ; Humans ; Isoelectric Point ; Mice ; Molecular Sequence Data ; Molecular Structure ; Molecular Weight ; *Polymers/*chemical synthesis/*chemistry/pharmacokinetics/pharmacology ; Protein Folding ; Proteins/*chemical synthesis/*chemistry/pharmacokinetics/pharmacology ; Rats ; Receptors, Erythropoietin/drug effects/metabolism ; Recombinant Proteins ; Spectrometry, Mass, Electrospray Ionization
    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: 2002-10-05
    Description: Anopheles gambiae is the principal vector of malaria, a disease that afflicts more than 500 million people and causes more than 1 million deaths each year. Tenfold shotgun sequence coverage was obtained from the PEST strain of A. gambiae and assembled into scaffolds that span 278 million base pairs. A total of 91% of the genome was organized in 303 scaffolds; the largest scaffold was 23.1 million base pairs. There was substantial genetic variation within this strain, and the apparent existence of two haplotypes of approximately equal frequency ("dual haplotypes") in a substantial fraction of the genome likely reflects the outbred nature of the PEST strain. The sequence produced a conservative inference of more than 400,000 single-nucleotide polymorphisms that showed a markedly bimodal density distribution. Analysis of the genome sequence revealed strong evidence for about 14,000 protein-encoding transcripts. Prominent expansions in specific families of proteins likely involved in cell adhesion and immunity were noted. An expressed sequence tag analysis of genes regulated by blood feeding provided insights into the physiological adaptations of a hematophagous insect.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Holt, Robert A -- Subramanian, G Mani -- Halpern, Aaron -- Sutton, Granger G -- Charlab, Rosane -- Nusskern, Deborah R -- Wincker, Patrick -- Clark, Andrew G -- Ribeiro, Jose M C -- Wides, Ron -- Salzberg, Steven L -- Loftus, Brendan -- Yandell, Mark -- Majoros, William H -- Rusch, Douglas B -- Lai, Zhongwu -- Kraft, Cheryl L -- Abril, Josep F -- Anthouard, Veronique -- Arensburger, Peter -- Atkinson, Peter W -- Baden, Holly -- de Berardinis, Veronique -- Baldwin, Danita -- Benes, Vladimir -- Biedler, Jim -- Blass, Claudia -- Bolanos, Randall -- Boscus, Didier -- Barnstead, Mary -- Cai, Shuang -- Center, Angela -- Chaturverdi, Kabir -- Christophides, George K -- Chrystal, Mathew A -- Clamp, Michele -- Cravchik, Anibal -- Curwen, Val -- Dana, Ali -- Delcher, Art -- Dew, Ian -- Evans, Cheryl A -- Flanigan, Michael -- Grundschober-Freimoser, Anne -- Friedli, Lisa -- Gu, Zhiping -- Guan, Ping -- Guigo, Roderic -- Hillenmeyer, Maureen E -- Hladun, Susanne L -- Hogan, James R -- Hong, Young S -- Hoover, Jeffrey -- Jaillon, Olivier -- Ke, Zhaoxi -- Kodira, Chinnappa -- Kokoza, Elena -- Koutsos, Anastasios -- Letunic, Ivica -- Levitsky, Alex -- Liang, Yong -- Lin, Jhy-Jhu -- Lobo, Neil F -- Lopez, John R -- Malek, Joel A -- McIntosh, Tina C -- Meister, Stephan -- Miller, Jason -- Mobarry, Clark -- Mongin, Emmanuel -- Murphy, Sean D -- O'Brochta, David A -- Pfannkoch, Cynthia -- Qi, Rong -- Regier, Megan A -- Remington, Karin -- Shao, Hongguang -- Sharakhova, Maria V -- Sitter, Cynthia D -- Shetty, Jyoti -- Smith, Thomas J -- Strong, Renee -- Sun, Jingtao -- Thomasova, Dana -- Ton, Lucas Q -- Topalis, Pantelis -- Tu, Zhijian -- Unger, Maria F -- Walenz, Brian -- Wang, Aihui -- Wang, Jian -- Wang, Mei -- Wang, Xuelan -- Woodford, Kerry J -- Wortman, Jennifer R -- Wu, Martin -- Yao, Alison -- Zdobnov, Evgeny M -- Zhang, Hongyu -- Zhao, Qi -- Zhao, Shaying -- Zhu, Shiaoping C -- Zhimulev, Igor -- Coluzzi, Mario -- della Torre, Alessandra -- Roth, Charles W -- Louis, Christos -- Kalush, Francis -- Mural, Richard J -- Myers, Eugene W -- Adams, Mark D -- Smith, Hamilton O -- Broder, Samuel -- Gardner, Malcolm J -- Fraser, Claire M -- Birney, Ewan -- Bork, Peer -- Brey, Paul T -- Venter, J Craig -- Weissenbach, Jean -- Kafatos, Fotis C -- Collins, Frank H -- Hoffman, Stephen L -- R01AI44273/AI/NIAID NIH HHS/ -- U01AI48846/AI/NIAID NIH HHS/ -- U01AI50687/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2002 Oct 4;298(5591):129-49.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Celera Genomics, 45 West Gude Drive, Rockville, MD 20850, USA. robert.holt@celera.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12364791" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anopheles/classification/*genetics/parasitology/physiology ; Biological Evolution ; Blood ; Chromosome Inversion ; Chromosomes, Artificial, Bacterial ; Computational Biology ; DNA Transposable Elements ; Digestion ; Drosophila melanogaster/genetics ; Enzymes/chemistry/genetics/metabolism ; Expressed Sequence Tags ; Feeding Behavior ; Gene Expression Regulation ; *Genes, Insect ; Genetic Variation ; *Genome ; Haplotypes ; Humans ; Insect Proteins/chemistry/genetics/physiology ; Insect Vectors/genetics/parasitology/physiology ; Malaria, Falciparum/transmission ; Molecular Sequence Data ; Mosquito Control ; Physical Chromosome Mapping ; Plasmodium falciparum/growth & development ; Polymorphism, Single Nucleotide ; Proteome ; *Sequence Analysis, DNA ; Species Specificity ; Transcription Factors/chemistry/genetics/physiology
    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: 2015-09-11
    Description: The surface breakdown of dielectric windows seriously limits the transmission of high power microwaves (HPM), and has blocked the development of microwave technology in recent decades. In this paper, X-band HPM experiments of window breakdown at the vacuum/dielectric interface and the atmosphere/dielectric interface at single and repetitive pulses were conducted. The cross-linked polystyrene (CLPS) dielectric window with a periodic surface profile can significantly improve the breakdown threshold at single and repetitive pulses. Furthermore, the flat surface layer of CLPS was discovered to be carbonized to a depth of several millimeters and filled with electrical trees at repetitive pulses. Theoretical models were built to understand the underlying physics behind the phenomena in experiments. With the analysis of the electron resonance process breaking the molecular bond and the temperature rise caused by the traversing current in the dielectric material, a microscopic explanation for the carbonization of the dielectric window was introduced.
    Print ISSN: 1070-664X
    Electronic ISSN: 1089-7674
    Topics: Physics
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  • 9
    Publication Date: 1995-04-28
    Description: B61, a cytokine-inducible endothelial gene product, is the ligand for the Eck receptor protein tyrosine kinase (RPTK). Expression of a B61-immunoglobulin chimera showed that B61 could act as an angiogenic factor in vivo and a chemoattractant for endothelial cells in vitro. The Eck RPTK was activated by tumor necrosis factor-alpha (TNF-alpha) through induction of B61, and an antibody to B61 attenuated angiogenesis induced by TNF-alpha but not by basic fibroblast growth factor. This finding suggests the existence of an autocrine or paracrine loop involving activation of the Eck RPTK by its inducible ligand B61 after an inflammatory stimulus, the net effect of which would be to promote angiogenesis, a hallmark of chronic inflammation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pandey, A -- Shao, H -- Marks, R M -- Polverini, P J -- Dixit, V M -- DK 39255/DK/NIDDK NIH HHS/ -- HL 39926/HL/NHLBI NIH HHS/ -- P0 1AI331890004/AI/NIAID NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1995 Apr 28;268(5210):567-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Pathology, University of Michigan Medical School, Ann Arbor 48109, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7536959" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Cattle ; Cells, Cultured ; Chemotaxis ; Endothelium, Vascular/cytology/*physiology ; Enzyme Activation ; Ephrin-A1 ; Female ; Humans ; Membrane Proteins/*metabolism ; Molecular Sequence Data ; Neovascularization, Pathologic/*etiology ; Phosphorylation ; Protein-Tyrosine Kinases/*metabolism ; Proteins/*physiology ; Rats ; Rats, Inbred F344 ; Receptor, EphA2 ; Recombinant Fusion Proteins ; Tumor Necrosis Factor-alpha/*pharmacology
    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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  • 10
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2016-03-19
    Description: The theory of deconfined quantum critical (DQC) points describes phase transitions at absolute temperature T = 0 outside the standard paradigm, predicting continuous transformations between certain ordered states where conventional theory would require discontinuities. Numerous computer simulations have offered no proof of such transitions, instead finding deviations from expected scaling relations that neither were predicted by the DQC theory nor conform to standard scenarios. Here we show that this enigma can be resolved by introducing a critical scaling form with two divergent length scales. Simulations of a quantum magnet with antiferromagnetic and dimerized ground states confirm the form, proving a continuous transition with deconfined excitations and also explaining anomalous scaling at T 〉 0. Our findings revise prevailing paradigms for quantum criticality, with potential implications for many strongly correlated materials.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shao, Hui -- Guo, Wenan -- Sandvik, Anders W -- New York, N.Y. -- Science. 2016 Apr 8;352(6282):213-6. doi: 10.1126/science.aad5007. Epub 2016 Mar 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physics, Beijing Normal University, Beijing 100875, China. Beijing Computational Science Research Center, Beijing 100084, China. Department of Physics, Boston University, Boston, MA 02215, USA. ; Department of Physics, Beijing Normal University, Beijing 100875, China. State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China. waguo@bnu.edu.cn sandvik@bu.edu. ; Department of Physics, Boston University, Boston, MA 02215, USA. waguo@bnu.edu.cn sandvik@bu.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26989196" target="_blank"〉PubMed〈/a〉
    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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