An Extremely Top-Heavy IMF in the Galactic Center Stellar Disks (2009)
Bartko, H., Martins, F., Trippe, S., Fritz, T. K., Genzel, R., Ott, T., ...
We present new observations of the nuclear star cluster in the central parsec of the Galaxy with the adaptive optics assisted, integral field spectrograph SINFONI on the ESO/VLT. Our work allows the...
Evidence for warped disks of young stars in the galactic center (2009)
Bartko, H., Martins, F., Fritz, T. K., Genzel, R., Levin, Y., Perets, H. B., ...
Evidence for Warped Disks of Young Stars in the Galactic Center (2008)
Bartko, H., Martins, F., Fritz, T. K., Genzel, R., Levin, Y., Perets, H. B., ...
The central parsec around the super-massive black hole in the Galactic Center hosts more than 100 young and massive stars. Outside the central cusp (R~1") the majority of these O and Wolf-Rayet (WR)...
Hydromagnetic stresses in accretion discs have been the subject of intense theoretical research over the past one and a half decades. Most of the disc simulations have assumed a small initial...
Paumard, T., Genzel, R., Martins, F., Nayakshin, S., Beloborodov, A. M., Levin, Y., ...
We report the definite spectroscopic identification of 41 OB supergiants, giants and main sequence stars in the central parsec of the Galaxy. Detection of their absorption lines have become possible...
Clockwise Stellar Disk and the Dark Mass in the Galactic Center (2006)
Beloborodov, A. M., Levin, Y., Eisenhauer, F., Genzel, R., Paumard, T., Gillessen, S., ...
Two disks of young stars have recently been discovered in the Galactic Center. The disks are rotating in the gravitational field of the central black hole at radii r=0.1-0.3 pc and thus open a new...
A Dipeptidyl Carboxypeptidase that Converts Angiotensin I and Inactivates Bradykinin. (2005)
Yang,H. Y. T., Erdoes,E. G., Levin,Y.
The results of these experiments indicated that both angiotensin I and bradykinin are substrates of dipeptidyl carboxypeptidase; thus, the enzyme can inactivate the hypotensive peptide bradykinin and...
Odya,C. E., Levin,Y., Erdos,Ervin G.
Pig pancreatic kallikrein, aprotinin (Trasylol), SQ 21541, an angiotensin I converting enzyme or kininase II inhibitor, and bradykinin were each coupled covalently to soluble dextran (m.w. 500,000)....
Aging dynamics and density relaxation in granular compaction (2000)
Levin, Y., Arenzon, J. J., Sellitto, M.
We present an analytical approach to the out of equilibrium dynamics of a class of kinetic lattice gases under gravity. The location of the jamming transition, the critical exponents, and the scaling...
Charge inversion in DNA-amphiphile complexes: Possible application to gene therapy (1999)
Kuhn, P. S., Levin, Y., Barbosa, M. C.
We study a complex formation between the DNA and cationic amphiphilic molecules. As the amphiphile is added to the solution containing DNA, a cooperative binding of surfactants to the DNA molecules...
Complexation of DNA with Cationic Surfactant (1999)
Kuhn, P. S., Barbosa, Marcia C., Levin, Y.
Transfection of an anionic polynucleotide through a negatively charged membrane is an important problem in genetic engineering. The direct association of cationic surfactant to DNA decreases the...
A DIPEPTIDYL CARBOXYPEPTIDASE THAT CONVERTS ANGIOTENSIN I AND INACTIVATES BRADYKININ. (1998)
Yang,H. Y. T., Erdos,E. G., Levin,Y.
While studying the inactivation of bradykinin, it was noticed that in addition to carboxypeptidase N, a second enzyme, kininase II, cleaved the peptide. The latter enzyme hydrolyzed the Pro7-Phe8...
Seki,T., Yang,H. Y. T., Levin,Y., Jenssen,T. A., Erdos,E. G.
A variety of methods have been available for coupling proteins with water-insoluble carriers. In one previous study trypsin was coupled to the copolymer of maleic anhydride and ethylene (EMA) using...
Melting of a colloidal crystal (1997)
Kuhn, P. S., Diehl, A., Levin, Y., Barbosa, M. C.
A melting transition for a system of hard spheres interacting by a repulsive Yukawa potential of DLVO form is studied. To find the location of the phase boundary, we propose a simple theory to...
Study of the simplest realistic Higgs sector in quark-lepton symmetric models (1993)
A discrete symmetry between quarks and (generalized) leptons can exist in nature, and its spontaneous symmetry breaking scale can be as low as a few TeV. Such a discrete symmetry also has interesting...
The relationship between recruitment and speech discrimination / (1976)
Dissertation (BA (S and H Therapy))-University of the Witwatersrand, 1976.
Isolation and characterization of the subunits of human plasma carboxypeptidase N (kininase i).
Levin, Y, Skidgel, R A, Erdös, E G
Carboxypeptidase N (kininase I, arginine carboxypeptidase; EC 3.4.17.3) cleaves COOH-terminal basic amino acids of kinins, anaphylatoxins, and other peptides. The tetrameric enzyme of Mr 280,000 was...
Isolation and characterization of the subunits of human plasma carboxypeptidase N (kininase i).
Levin, Y, Skidgel, R A, Erdös, E G
Carboxypeptidase N (kininase I, arginine carboxypeptidase; EC 3.4.17.3) cleaves COOH-terminal basic amino acids of kinins, anaphylatoxins, and other peptides. The tetrameric enzyme of Mr 280,000 was...