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  • Physics  (17)
  • Structure, structural phase transitions, mechanical properties, defects  (6)
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  • 1
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    Computationally driven experimental discovery of the CeIr_{4}In compound (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-06-14
    Description: Author(s): D. J. Fredeman, P. H. Tobash, M. A. Torrez, J. D. Thompson, E. D. Bauer, F. Ronning, W. W. Tipton, Sven P. Rudin, and R. G. Hennig We present a combined experimental and computational methodology for the discovery of new materials. Density functional theory (DFT) formation energy calculations allow us to predict the stability of various hypothetical structures. We demonstrate this approach by computationally predicting the Ce-I... [Phys. Rev. B 83, 224102] Published Mon Jun 13, 2011
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 2
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    Ab initio based empirical potential used to study the mechanical properties of molybdenum (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-06-22
    Description: Author(s): Hyoungki Park, Michael R. Fellinger, Thomas J. Lenosky, William W. Tipton, Dallas R. Trinkle, Sven P. Rudin, Christopher Woodward, John W. Wilkins, and Richard G. Hennig Density-functional theory energies, forces, and elastic constants determine the parametrization of an empirical, modified embedded-atom method potential for molybdenum. The accuracy and transferability of the potential are verified by comparison to experimental and density-functional data for point ... [Phys. Rev. B 85, 214121] Published Thu Jun 21, 2012
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 3
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    Density functional theory investigation of titanium-tungsten superlattices: Structure and mechanical properties (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-11-10
    Description: Author(s): Sven P. Rudin Titanium (Ti) exhibits the body-centered crystal structure only at high temperatures. The temperature range of this so-called β -Ti phase can be expanded by alloying Ti with tungsten (W). Rather than placing the W atoms in the β -Ti crystal at random, this work applies density functional theory calcul... [Phys. Rev. B 86, 184104] Published Fri Nov 09, 2012
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
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    Nanoscale heterogeneity, premartensitic nucleation, and a new plutonium structure in metastable δ fcc Pu-Ga alloys (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-06-19
    Description: Author(s): Steven D. Conradson, Nicolas Bock, Julio M. Castro, Dylan R. Conradson, Lawrence E. Cox, Wojciech Dmowski, David E. Dooley, Takeshi Egami, Francisco J. Espinosa-Faller, Franz J. Freibert, Angel J. Garcia-Adeva, Nancy J. Hess, Erik K. Holmström, Rafael C. Howell, Barbara Katz, Jason C. Lashley, Raymond J. Martinez, David P. Moore, Luis A. Morales, J. David Olivas, Ramiro A. Pereyra, Michael Ramos, Sven P. Rudin, and Phillip M. Villella The scientifically fascinating question of the spatial extent and bonding of the 5f orbitals of Pu and its six different phases extends to its δ-retained alloys and the mechanism by which Ga and a number of other unrelated elements stabilize its low density face-centered-cubic (fcc) structure. This ... [Phys. Rev. B 89, 224102] Published Wed Jun 18, 2014
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 5
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    Smoothened mutation confers resistance to a Hedgehog pathway inhibitor in medulloblastoma (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-09-04
    Description: The Hedgehog (Hh) signaling pathway is inappropriately activated in certain human cancers, including medulloblastoma, an aggressive brain tumor. GDC-0449, a drug that inhibits Hh signaling by targeting the serpentine receptor Smoothened (SMO), has produced promising anti-tumor responses in early clinical studies of cancers driven by mutations in this pathway. To evaluate the mechanism of resistance in a medulloblastoma patient who had relapsed after an initial response to GDC-0449, we determined the mutational status of Hh signaling genes in the tumor after disease progression. We identified an amino acid substitution at a conserved aspartic acid residue of SMO that had no effect on Hh signaling but disrupted the ability of GDC-0449 to bind SMO and suppress this pathway. A mutation altering the same amino acid also arose in a GDC-0449-resistant mouse model of medulloblastoma. These findings show that acquired mutations in a serpentine receptor with features of a G protein-coupled receptor can serve as a mechanism of drug resistance in human cancer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yauch, Robert L -- Dijkgraaf, Gerrit J P -- Alicke, Bruno -- Januario, Thomas -- Ahn, Christina P -- Holcomb, Thomas -- Pujara, Kanan -- Stinson, Jeremy -- Callahan, Christopher A -- Tang, Tracy -- Bazan, J Fernando -- Kan, Zhengyan -- Seshagiri, Somasekar -- Hann, Christine L -- Gould, Stephen E -- Low, Jennifer A -- Rudin, Charles M -- de Sauvage, Frederic J -- New York, N.Y. -- Science. 2009 Oct 23;326(5952):572-4. doi: 10.1126/science.1179386. Epub 2009 Sep 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Genentech, South San Francisco, CA 94080, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19726788" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acid Substitution ; Anilides/metabolism/pharmacology/*therapeutic use ; Animals ; Antineoplastic Agents/metabolism/pharmacology/*therapeutic use ; Brain Neoplasms/*drug therapy/*genetics/pathology ; Cell Line, Tumor ; Cinnamates/pharmacology ; Drug Resistance, Neoplasm ; Hedgehog Proteins/antagonists & inhibitors/genetics/*metabolism ; Humans ; Medulloblastoma/*drug therapy/*genetics/pathology ; Mice ; Molecular Sequence Data ; Mutant Proteins/antagonists & inhibitors/chemistry/metabolism ; Mutation, Missense ; Neoplasm Metastasis ; Protein Conformation ; Pyridines/metabolism/pharmacology/*therapeutic use ; Receptors, Cell Surface/genetics/metabolism ; Receptors, G-Protein-Coupled/antagonists & ; inhibitors/chemistry/*genetics/metabolism ; Signal Transduction ; Veratrum Alkaloids/pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 6
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    DICER1 deficit induces Alu RNA toxicity in age-related macular degeneration (2011)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2011-02-08
    Description: Geographic atrophy (GA), an untreatable advanced form of age-related macular degeneration, results from retinal pigmented epithelium (RPE) cell degeneration. Here we show that the microRNA (miRNA)-processing enzyme DICER1 is reduced in the RPE of humans with GA, and that conditional ablation of Dicer1, but not seven other miRNA-processing enzymes, induces RPE degeneration in mice. DICER1 knockdown induces accumulation of Alu RNA in human RPE cells and Alu-like B1 and B2 RNAs in mouse RPE. Alu RNA is increased in the RPE of humans with GA, and this pathogenic RNA induces human RPE cytotoxicity and RPE degeneration in mice. Antisense oligonucleotides targeting Alu/B1/B2 RNAs prevent DICER1 depletion-induced RPE degeneration despite global miRNA downregulation. DICER1 degrades Alu RNA, and this digested Alu RNA cannot induce RPE degeneration in mice. These findings reveal a miRNA-independent cell survival function for DICER1 involving retrotransposon transcript degradation, show that Alu RNA can directly cause human pathology, and identify new targets for a major cause of blindness.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3077055/" 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/PMC3077055/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaneko, Hiroki -- Dridi, Sami -- Tarallo, Valeria -- Gelfand, Bradley D -- Fowler, Benjamin J -- Cho, Won Gil -- Kleinman, Mark E -- Ponicsan, Steven L -- Hauswirth, William W -- Chiodo, Vince A -- Kariko, Katalin -- Yoo, Jae Wook -- Lee, Dong-ki -- Hadziahmetovic, Majda -- Song, Ying -- Misra, Smita -- Chaudhuri, Gautam -- Buaas, Frank W -- Braun, Robert E -- Hinton, David R -- Zhang, Qing -- Grossniklaus, Hans E -- Provis, Jan M -- Madigan, Michele C -- Milam, Ann H -- Justice, Nikki L -- Albuquerque, Romulo J C -- Blandford, Alexander D -- Bogdanovich, Sasha -- Hirano, Yoshio -- Witta, Jassir -- Fuchs, Elaine -- Littman, Dan R -- Ambati, Balamurali K -- Rudin, Charles M -- Chong, Mark M W -- Provost, Patrick -- Kugel, Jennifer F -- Goodrich, James A -- Dunaief, Joshua L -- Baffi, Judit Z -- Ambati, Jayakrishna -- NIHU10EY013729/EY/NEI NIH HHS/ -- P30 EY006360/EY/NEI NIH HHS/ -- P30 EY014800/EY/NEI NIH HHS/ -- P30 EY014800-07/EY/NEI NIH HHS/ -- P30 EY021721/EY/NEI NIH HHS/ -- P30EY003040/EY/NEI NIH HHS/ -- P30EY008571/EY/NEI NIH HHS/ -- P30EY06360/EY/NEI NIH HHS/ -- R01 EY018350/EY/NEI NIH HHS/ -- R01 EY018350-05/EY/NEI NIH HHS/ -- R01 EY018836/EY/NEI NIH HHS/ -- R01 EY018836-04/EY/NEI NIH HHS/ -- R01 EY020672/EY/NEI NIH HHS/ -- R01 EY020672-02/EY/NEI NIH HHS/ -- R01 GM068414/GM/NIGMS NIH HHS/ -- R01EY001545/EY/NEI NIH HHS/ -- R01EY011123/EY/NEI NIH HHS/ -- R01EY015240/EY/NEI NIH HHS/ -- R01EY015422/EY/NEI NIH HHS/ -- R01EY017182/EY/NEI NIH HHS/ -- R01EY017950/EY/NEI NIH HHS/ -- R01EY018350/EY/NEI NIH HHS/ -- R01EY018836/EY/NEI NIH HHS/ -- R01EY020672/EY/NEI NIH HHS/ -- R01GM068414/GM/NIGMS NIH HHS/ -- R01HD027215/HD/NICHD NIH HHS/ -- R21 EY019778/EY/NEI NIH HHS/ -- R21 EY019778-02/EY/NEI NIH HHS/ -- R21AI076757/AI/NIAID NIH HHS/ -- R21EY019778/EY/NEI NIH HHS/ -- RC1 EY020442/EY/NEI NIH HHS/ -- RC1 EY020442-02/EY/NEI NIH HHS/ -- RC1EY020442/EY/NEI NIH HHS/ -- T32HL091812/HL/NHLBI NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2011 Mar 17;471(7338):325-30. doi: 10.1038/nature09830. Epub 2011 Feb 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Ophthalmology & Visual Sciences, University of Kentucky, Lexington, Kentucky 40506, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21297615" target="_blank"〉PubMed〈/a〉
    Keywords: Alu Elements/*genetics ; Animals ; Cell Death ; Cell Survival ; Cells, Cultured ; DEAD-box RNA Helicases/*deficiency/genetics/metabolism ; Gene Knockdown Techniques ; Humans ; Macular Degeneration/*genetics/*pathology ; Mice ; MicroRNAs/metabolism ; Molecular Sequence Data ; Oligonucleotides, Antisense ; Phenotype ; RNA/*genetics/*metabolism ; Retinal Pigment Epithelium/enzymology/metabolism/pathology ; Ribonuclease III/*deficiency/genetics/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 7
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    Generalization of soft phonon modes (2018)
    American Physical Society (APS)
    Details
    Publication Date: 2018-04-28
    Description: Author(s): Sven P. Rudin Soft phonon modes describe a collective movement of atoms that transform a higher-symmetry crystal structure into a lower-symmetry crystal structure. Such structural transformations occur at finite temperatures, where the phonons (i.e., the low-temperature vibrational modes) and the static perfect c... [Phys. Rev. B 97, 134114] Published Fri Apr 27, 2018
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 8
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    Treatment and prevention of rat glioblastoma by immunogenic C6 cells expressing antisense insulin-like growth factor I RNA (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-01-01
    Description: Rat C6 glioma cells express insulin-like growth factor I (IGF-I) and form rapidly growing tumors in syngeneic animals. When transfected with an episome-based vector encoding antisense IGF-I complementary DNA, these cells lost tumorigenicity. Subcutaneous injection of IGF-I antisense-transfected C6 cells into rats prevented formation of both subcutaneous tumors and brain tumors induced by nontransfected C6 cells. The antisense-transfected cells also caused regression of established brain glioblastomas when injected at a point distal to the tumor. These antitumor effects result from a glioma-specific immune response involving CD8+ lymphocytes. Antisense blocking of IGF-I expression may reverse a phenotype that allows C6 glioma cells to evade the immune system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Trojan, J -- Johnson, T R -- Rudin, S D -- Ilan, J -- Tykocinski, M L -- CA-43703/CA/NCI NIH HHS/ -- HD-18271/HD/NICHD NIH HHS/ -- HD-25004/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1993 Jan 1;259(5091):94-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉INSERM, Paris.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8418502" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD8/*immunology ; Brain Neoplasms/immunology/pathology/*prevention & control/*therapy ; Cytotoxicity, Immunologic ; DNA, Recombinant ; Glioma/immunology/pathology/*prevention & control/*therapy ; Immunohistochemistry ; Insulin-Like Growth Factor I/*genetics ; RNA, Antisense/pharmacology/*therapeutic use ; Rats ; T-Lymphocyte Subsets/*immunology ; *Transfection ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 9
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    Multiphase aluminum equations of state via density functional theory (2016)
    American Physical Society (APS)
    Details
    Publication Date: 2016-10-04
    Description: Author(s): Travis Sjostrom, Scott Crockett, and Sven Rudin We have performed density functional theory (DFT) based calculations for aluminum in extreme conditions of both pressure and temperature, up to five times compressed ambient density, and over 1 000 000 K in temperature. In order to cover such a domain, DFT methods including phonon calculations, quan… [Phys. Rev. B 94, 144101] Published Mon Oct 03, 2016
    Keywords: Structure, structural phase transitions, mechanical properties, defects
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 10
    Electronic Resource
    Electronic Resource
    Quantitative analysis of three phases of high-density polyethylene with 2D time-domain proton NMR (1997)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 35 (1997), S. 2551-2558 
    Details
    ISSN: 0887-6266
    Keywords: polyethylene ; crystalline ; intermediate ; amorphous ; proton NMR ; rotating frame ; 2D time-domain analysis ; Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: With two-dimensional time-domain NMR analysis in the proton spin rotating frame, three phases are identifiable in the solid polyethylene. The major proton magnetization fraction is due to the polymer's crystalline region, where the motion is least isotropic and slowest. A magnetization fraction with intermediate relaxation rate is also intermediate in magnitude. This component is proposed to comprise chain loops on the surfaces of crystallites and effectively entangled chain segments. The most mobile fraction, which is most liquid-like with a T2 of near 1 ms at 120°C, is also the smallest. It is proposed that it is due to polymer chains in the amorphous phase. In the crystalline phase the chain motion is an unexpectedly effective relaxation mechanism at ∼50 KHz. This process, which involves propagation of a twisted region along the crystallite, as has been suggested before, is either not present in the other two phases of the HDPE or is less efficient because of the lower polymer density. The activation energies for the crystalline, intermediate and amorphous phases are estimated to be 34 ± 3, 13 ± 3, and 8 ± 2 Kcal/mol, respectively. The frequencies of the relaxation process at 120°C are 43 KHz, 350 KHz, and 1.5 MHz, respectively. © 1997 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 35: 2551-2558, 1997
    Additional Material: 3 Ill.
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