The combustion energy of thioproline was determined
by the precision rotating-bomb calorimeter at 298.15 K to be ΔcU= –2469.301.44 kJ mol–1.
From the results and other auxiliary quantities, the standard molar enthalpy
of combustion and the standard molar enthalpy of formation of thioproline
were calculated to be ΔcHmθC4H7NO2S,
(s), 298.15 K= –2469.921.44 kJ mol–1
and ΔfHmθC4H7NO2S, (s), 298.15K= –401.331.54
Authors:J. Binner, G. Dimitrakis, D. Price, M. Reading, and B. Vaidhyanathan
of the β to α phase transition in silver iodide was investigated
by conventional and modulated temperature DSC and dielectric property measurements.
On cooling, the high temperature phase remained stable 2.5C below its
normal transition temperature even at a very slow cooling rate 0.2C h–1.
Dielectric property measurements under conventional and microwave heating
suggested an anomalous effect of the latter on the β to α phase
transition in this material.
Authors:O. Manuel, J. Lee, D. Ragland, J. Macelroy, Bin Li, and W. Brown
Formation of the Solar System from heterogeneous debris of a supernova (SN) that exploded 5 billion years ago was recorded
as (1) inter-linked chemical and isotopic heterogeneities in meteorites, (2) higher levels of extinct nuclides in grains that
trapped larger isotopic anomalies, (3) the physical properties of grains mentioned in part (2), and (4) patterns of isotopic
anomalies in meteorites, in the solar-wind, and in solar flare particles. The Sun formed on the SN core, and planets formed
in a rotationally-supported, equatorial disk of SN debris. Interiors of the Sun and the inner planets accreted first in a
central, Fe-rich region surrounding the SN core. These were layered as condensate from other parts of the SN fell toward the
condensing Sun. Elements in outer SN layers formed low-density, giant Jovian planets. Intra-solar diffusion enriches hydrogen
and lighter isotopes of individual elements at the Sun's surface.