6 results match your criteria: "City College of New York 10031.[Affiliation]"

Reaction centers from Rhodobacter sphaeroides were subjected to Monte Carlo sampling to determine the Boltzmann distribution of side-chain ionization states and positions and buried water orientation and site occupancy. Changing the oxidation states of the bacteriochlorophyll dimer electron donor (P) and primary (QA) and secondary (QB) quinone electron acceptors allows preparation of the ground (all neutral), P+QA-, P+QB-, P0QA-, and P0QB- states. The calculated proton binding going from ground to other oxidation states and the free energy of electron transfer from QA-QB to form QAQB- (DeltaGAB) compare well with experiment from pH 5 to pH 11.

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A thymic epithelial cell line (tsTNC-1) that maintains the ability to selectively bind and internalize immature alpha beta TCRloCD4+CD8+ thymocytes in vitro was used in the development of a monoclonal antibody that is specific to the cell surface of thymic nurse cells (TNCs) in the thymus. The rat monoclonal antibody ph91 showed specificity to cells of the subcapsular region of the thymic cortex. Upon mechanical dispersion of the thymus in vitro, ph91 recognized cells displaying the multicellular morphology unique to TNCs.

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A temperature-sensitive line of thymic nurse cells (tsTNC-1) that maintains the ability to selectively internalize immature alpha beta TCRloCD4+CD8+ thymocytes in vitro was used in long-term coincubation experiments to determine nurse cell function during the process of MHC restriction. The thymocyte subset released from its association with TNCs contained both viable and apoptotic cells. The cells that remained within intracytoplasmic vacuoles died through the process of programmed cell death.

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Coronary artery spasm and no spasmogens?

Med Hypotheses

March 1993

Department of Physiology, City University of New York Medical School, City College of New York 10031.

Traditionally coronary artery spasm, which is implicated in the pathogenesis of angina, myocardial infarction and sudden death, has been perceived as involving either a powerful spasmogen or larger quantities of a less potent stimulant. The present essay proposes that spasm may occur in the complete absence of any inciting chemical or spasmogen. Sudden intense coronary artery constriction may reflect an abnormality in an intrinsic system of tone regulation involving pacemaker cell discharge, intercellular conduction through gap junctions to adjacent cells, and the cycling of extracellular and bound calcium.

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Alcohol and cancer.

Annu Rev Pharmacol Toxicol

June 1990

Department of Microbiology, City University of New York Medical School, Sophie Davis School of Biomedical Education, City College of New York 10031.

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