State University of New York System

About: State University of New York System is a education organization based out in Albany, New York, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 54077 authors who have published 78070 publications receiving 2985160 citations.

A two-pyroxene thermometer

Abstract: Experimentally determined pyroxene phase relations at 800-1200 C are combined with calculated phase equilibria for the Di-En and Hd-Fs joins to yield a graphical two-pyroxene thermometer that should be suitable for a wide variety of rocks from the earth, the moon, and meteorites. The thermometer can be used directly with natural pyroxenes having low contents of Al and other minor components. Samples having higher contents of 'other' components require special projection onto the Ca-Mg-Fe pyroxene quadrilateral; Wo, En, and Fs as normally calculated will not yield correct temperatures. The special projection is required to approximate the activities of those components in natural pyroxenes. Whereas the effects of pressure are nonnegligible, they can be corrected for. It is pointed out that use of the thermometer for slowly cooled rocks may pose special problems if the pyroxenes have undergone granule exsolution (coalescence of exsolved material to form separate grains).

How does PKMζ maintain long-term memory?

Abstract: Most of the molecular mechanisms contributing to long-term memory have been found to consolidate information within a brief time window after learning, but not to maintain information during memory storage. However, with the discovery that synaptic long-term potentiation is maintained by the persistently active protein kinase, protein kinase Mζ (PKMζ), a possible mechanism of memory storage has been identified. Recent research shows how PKMζ might perpetuate information both at synapses and during long-term memory.

Unexpected Stable Stoichiometries of Sodium Chlorides

Abstract: Sodium chloride (NaCl), or rocksalt, is well characterized at ambient pressure. As a result of the large electronegativity difference between Na and Cl atoms, it has highly ionic chemical bonding (with 1:1 stoichiometry dictated by charge balance) and B1-type crystal structure. By combining theoretical predictions and diamond anvil cell experiments, we found that new materials with different stoichiometries emerge at high pressures. Compounds such as Na3Cl, Na2Cl, Na3Cl2, NaCl3, and NaCl7 are theoretically stable and have unusual bonding and electronic properties. To test this prediction, we synthesized cubic and orthorhombic NaCl3 and two-dimensional metallic tetragonal Na3Cl. These experiments establish that compounds violating chemical intuition can be thermodynamically stable even in simple systems at nonambient conditions.

Mechanisms of Cardiac Fibrillation

Abstract: 18. R. C. Desrosiers, AIDS Pes. Horn. Retrovlr. 10, 331 fibrillation (6). Fuirthermi-ore, the width of 8. R. M. Ruprecht et al., J. AIDS 3, 591 (1990); P. M. (1994). thcse frcurc pcr a erltdt Ruprecht et al., Proc. Nat!. Acad. Sci. U.S.A. 87, 19. D. D. Ho and Y. Cao. N. Engl. 3. Med. 332. 1647reule spcrca beeatdo 5558 (1990); R. C. Horn, P. W. Finberg, S. Mullaney, (1995). the frequency of rotation of the rotor, thei H. M. Ruprecht, 3. Virol. 65, 220 (1991);R. M. RU20. F. Kirchhoff, H. W. Kostler, R. C. Desrosiers. 3. Virol. speed of its motion, and the wave speed prechit and R. Bronson, DNA Ce//Pie!O. 13, 59 (1994). 68. 2031 (1994). throuui h oplrpeninnicod 9 R. M. Huprecht et al.. unpublished data. 21.~Wethank L. Geronimo tor preparing this maniuscript. \"I~teDppe hnmeo cod 10. M. L. Marthas et a!., 3. Virol. 64, 3694 (1990). Supported in part by NIH grants 2RD1 A132330-05 MItL to the following relationship: 11 3. 5. Dibbs et a)., AIDS Res. Hum. Retrovir. 10, 607 and 2BD1 A135533 02, DAMD grant 1 7 94-J-4431 (1994). to H.M.R., and bytheCentertorAIDS Research core 1/1+ O, ./)<~5t 12, M. L. Marthas et a)., 3. Virol. 69, 4198 (1995). grant (P3