Search Results - (Author, Cooperation:Y. Levin)
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1Latest Papers from Table of Contents or Articles in PressR. M. Shannon ; V. Ravi ; L. T. Lentati ; P. D. Lasky ; G. Hobbs ; M. Kerr ; R. N. Manchester ; W. A. Coles ; Y. Levin ; M. Bailes ; N. D. Bhat ; S. Burke-Spolaor ; S. Dai ; M. J. Keith ; S. Oslowski ; D. J. Reardon ; W. van Straten ; L. Toomey ; J. B. Wang ; L. Wen ; J. S. Wyithe ; X. J. Zhu
American Association for the Advancement of Science (AAAS)
Published 2015Staff ViewPublication Date: 2015-09-26Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
2Latest Papers from Table of Contents or Articles in PressU. Alcolombri ; S. Ben-Dor ; E. Feldmesser ; Y. Levin ; D. S. Tawfik ; A. Vardi
American Association for the Advancement of Science (AAAS)
Published 2015Staff ViewPublication Date: 2015-06-27Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Algal Proteins/*chemistry/classification/genetics ; Amino Acid Sequence ; Bacteria/enzymology/genetics ; Carbon-Sulfur Lyases/*chemistry/classification/genetics ; Haptophyta/*enzymology/genetics ; Molecular Sequence Data ; Phylogeny ; Phytoplankton/enzymology ; RNA, Messenger/biosynthesis ; Recombinant Proteins/chemistry ; Sulfides/*metabolismPublished by: -
3Latest Papers from Table of Contents or Articles in PressR. M. Shannon ; V. Ravi ; W. A. Coles ; G. Hobbs ; M. J. Keith ; R. N. Manchester ; J. S. Wyithe ; M. Bailes ; N. D. Bhat ; S. Burke-Spolaor ; J. Khoo ; Y. Levin ; S. Oslowski ; J. M. Sarkissian ; W. van Straten ; J. P. Verbiest ; J. B. Wang
American Association for the Advancement of Science (AAAS)
Published 2013Staff ViewPublication Date: 2013-10-19Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsPublished by: -
4Latest Papers from Table of Contents or Articles in PressCarter, D., van Hoeven, N., Baldwin, S., Levin, Y., Kochba, E., Magill, A., Charland, N., Landry, N., Nu, K., Frevol, A., Ashman, J., Sagawa, Z. K., Beckmann, A. M., Reed, S. G.
American Association for the Advancement of Science (AAAS)
Published 2018Staff ViewPublication Date: 2018-09-13Publisher: American Association for the Advancement of Science (AAAS)Electronic ISSN: 2375-2548Topics: Natural Sciences in GeneralPublished by: -
5Articles: DFG German National LicensesMundy, C. J. ; Levin, Y. ; Dawson, K. A.
College Park, Md. : American Institute of Physics (AIP)
Published 1992Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: We consider a Hamiltonian for a complex fluid. The linear excess bulk viscosity due to a spatially varying order parameter is investigated. We calculate the dependence of the excess viscosity Δη, on the fundamental parameters d and ξ, everywhere within the disordered phase (d being the domain size of water or oil and ξ being the correlation length between domains). It is found that there is a crossover region in the isotropic disordered phase of this model. More specifically, in the structured region of the isotropic disordered phase Δη grows as ξ3 in the vicinity of disordered-lamellar transition. This is quite distinct from the behavior of the excess viscosity in the unstructured region where Δη grows as ξ in the vicinity of the order-disorder transition.Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesSEKI, T. ; JENSSEN, T. A. ; LEVIN, Y. ; ERDÖS, E. G.
[s.l.] : Nature Publishing Group
Published 1970Staff ViewISSN: 1476-4687Source: Nature Archives 1869 - 2009Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsNotes: [Auszug] Partially purified hog kidney renin was obtained from commercial sources. It contained a 4 ng of renin pressor activity per mg protein5 according to the manufacturer's specifications (Pentex Biochemicals). Renin substrate angiotensinogen was purified from hog plasma as described previously6,7. The ...Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesStaff View
ISSN: 0005-2728Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyChemistry and PharmacologyMedicinePhysicsType of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesFreedberg, I.M. ; Levin, Y. ; Kay, C.M. ; McCubbin, W.D. ; Katchalski-Katzir, E.
Amsterdam : ElsevierStaff ViewISSN: 0005-2744Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyType of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesStaff View
ISSN: 0005-2795Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyType of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesStaff View
ISSN: 0014-5793Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyChemistry and PharmacologyPhysicsType of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesStaff View
ISSN: 0378-4371Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: PhysicsType of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesStaff View
ISSN: 0006-291XSource: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyChemistry and PharmacologyPhysicsType of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesStaff View
ISSN: 0304-4165Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: BiologyChemistry and PharmacologyMedicinePhysicsType of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesStaff View
ISSN: 1434-6036Keywords: PACS. 82.70.Dd Colloids - 36.20.-r Macromolecules and polymer molecules - 64.60.Cn Order-disorder transformations; statistical mechanics of model systemsSource: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract: We consider a system composed of a monodisperse charge-stabilized colloidal suspension in the presence of monovalent salt, separated from the pure electrolyte by a semipermeable membrane, which allows the crossing of solvent, counterions, and salt particles, but prevents the passage of polyions. The colloidal suspension, that is in a crystalline phase, is considered using a spherical Wigner-Seitz cell. After the Donnan equilibrium is achieved, there will be a difference in pressure between the two sides of the membrane. Using the functional density theory, we obtained the expression for the osmotic pressure as a function of the concentration of added salt, the colloidal volume fraction, and the size and charge of the colloidal particles. The results are compared with the experimental measurements for ordered polystyrene lattices of two different particle sizes over a range of ionic strengths and colloidal volume fractions.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesStaff View
ISSN: 1420-9071Source: Springer Online Journal Archives 1860-2000Topics: BiologyMedicineNotes: Zusammenfassung Polyaminomalonsäure (VIII), das erste Glied der homologen Poly-α-aminodikarbonsäuren, wurde synthetisiert, ausgehend von Aminomalonsäurediäthylester (I), der mit Chlorameisensäuremethylester in N-Carbome thoxy - aminomalonsäure - diäthylester (II) überführt wurde. Aus II wurde der Halbester III dargestellt, der durch Phosphorpentachlorid in das Leuchs-Anhydrid IV verwandelt wurde. Durch Erhitzen im Vakuum auf 90 bis 120° oder durch Stehenlassen in Pyridin wurde aus IV der Polyaminomalonsäureester mit endständiger freier Carboxylgruppe (VI) erhalten, aus dem die freie Polyaminomalonsäure (VIII) mit einem durchschnittlichen Polymerisationsgrad von 70–85 und einem durchschnittlichen Molekulargewicht von 7000 bis 8500 gewonnen wurde.Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesStaff View
ISSN: 1434-6036Keywords: PACS. 61.20.Qg Structure of associated liquids: electrolytes, molten salts, etc. - 61.25.Hq Macromolecular and polymer solutions; polymer melts; swellingSource: Springer Online Journal Archives 1860-2000Topics: PhysicsNotes: Abstract: We present a simple model for the possible mechanism of appearance of attraction between like charged polyions inside a polyelectrolyte solution. The attraction is found to be short ranged, and exists only in the presence of multivalent counterions. It is produced by the correlations in layers of condensed counterions surrounding each polyion and is only weakly temperature dependent. We find the attraction to be maximum at zero temperature and dimish as the temperature is raised. The attraction is only possible if the number of condensed counterions exceeds the threshold, , where is the valence of counterions and Z is the polyion charge.Type of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesStaff View
ISSN: 0006-3592Keywords: Chemistry ; Biochemistry and BiotechnologySource: Wiley InterScience Backfile Collection 1832-2000Topics: BiologyProcess Engineering, Biotechnology, Nutrition TechnologyNotes: Highly charged water-soluble conjugates of amyloglucosidase with a copolymer of ethylene-maleic acid or styrene-maleic acid were prepared and adsorbed on DEAE-cellulose and other cationic resins. Negatively charged enzyme conjugates were also obtained by means of succinylation. The polyanionic conjugates of amyloglucosidase adsorbed on the cationic carriers show higher temperature stability than the native enzyme adsorbed on the same carriers under the same experimental conditions. The insoluble enzyme conjugate-carrier complexes could be reused and retained their full activity while working continuously for three weeks. The application of the insoluble enzyme preparations with the above characteristics which could possibly satisfy the requirements for industry are discussed.Additional Material: 10 Ill.Type of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesStaff View
ISSN: 0006-3592Keywords: Chemistry ; Biochemistry and BiotechnologySource: Wiley InterScience Backfile Collection 1832-2000Topics: BiologyProcess Engineering, Biotechnology, Nutrition TechnologyNotes: A simple method for immobilizing amyloglucosidase by adsorption on inorganic carriers is described. Amyloglucosidase was adsorbed on acid-activated molecular sieve and on alumina. The immobilized enzyme preparations exhibited 50-100% of the initial activity and possessed high temperature stability. A prolonged working life span was achieved, which could possibly satisfy requirements for industrial application.Additional Material: 4 Ill.Type of Medium: Electronic ResourceURL: