Introduction: The south martian polar cap is predominately composed of CO2 ice [1,2]. Early modeling of the polar caps suggested that they were in equilibrium with the ~6 mbar CO2 atmosphere [2], and various observations have shown a cyclicity of growth and retreat, following martian seasons [3]. Other studies show that CO2 ice is only a thin veneer on the surface of a probably much thicker ice...

Sublimation of near-racemic samples of serine yields a sublimate which is highly enriched in the major enantiomer; this simple one-step process occurs under relatively mild conditions, and represents a possible mechanism for the chiral amplification step in homochirogenesis.

Accurate computational prediction of melting points and aqueous solubilities of organic compounds would be very useful but is notoriously difficult. Predicting the lattice energies of compounds is key to understanding and predicting their melting behavior and ultimately their solubility behavior. We report robust, predictive, quantitative structure-property relationship (QSPR) models for enthal...

The sublimation of Ar/H 20, CO/H 20, and C0 2/H 20 mixtures condensed at 23-30 K was investigated. The release of the more volatile component of the ice mixture occurred in several discrete temperature regions. Gas release, as monitored by a mass spectrometer, was correlated with changes in the infrared spectrum of the solid ice. The results are in substantial agreement with those of Bar-Nun an...

Eddy covariance data collected over a horizontal surface on the largest ice body on Kilimanjaro, Tanzania, over 26–29 July 2005 were used to assess the uncertainty of calculating sublimation with a surface energy balance (SEB) model. Data required for input to the SEB model were obtained from an existing automatic weather station. Surface temperatures that were solved iteratively by the SEB mod...

The vaporization, fusion, and sublimation enthalpies of (R,S)- and (R)-flurbiprofen at T = 298.15 K are reported and compared with literature values when available. Correlation gas chromatography experiments were first performed to identify appropriate standards that could be used for materials containing a single fluorine substituent. Subsequent correlations resulted in a vaporization enthalpy...

In the partial sublimation of three enantiomerically enriched amino acids, the ee of the sublimates can be explained by the ratio between the saturated vapor pressures of the racemate and the pure enantiomers.

Sigmund Freud is only occasionally referenced as a theorist of art. Given his general theory however, its applicability can easily extend to art, and this was a significant part of his own writing. Aesthetics for Freud is a form of wish fulfilment. It is a way to deal with the struggle of the transition from the pleasure to the Reality Principle. This conversion lies at the root of much persona...

A vacuum sublimation apparatus is described which will permit, (a) the removal of water from virus suspensions at temperatures ranging down to -80 degrees C., (b) continuous operation with a minimum of attention from the investigator, (c) sealing off of samples at operating pressures (10(-5) mm. Hg), (d) simultaneous lyophilization of aliquot samples at different temperatures, (e) isolation of ...

The heat of sublimation of the endohedral metallofullerene Er(3)N@C(80) was measured via Knudsen effusion mass spectrometry. The large molecule consists of a C(80) fullerene cage which is stabilized by a complex of three erbium atoms bounded to a nitrogen atom and has a mass of 1475 amu. The mass spectrum at a temperature of 1045 K and the relative intensities of the thermal fractions of Er(3)N...