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Comparative semiempirical, ab initio, and DFT study on the thermodynamic properties of linear and branched PFSA/Fs, PFCA/Fs, and perhydroalkyl sulfonic acids, alkanes, and alcohols
A systematic and comprehensive semiempirical, Hartree-Fock (HF) ab initio, and B3LYP density functional theory (DFT) study was conducted on the relative thermodynamic properties of various linear a…
Received 31 October 2009 17:11 UTC; Posted 02 November 2009
Posted to: Chemistry, Earth & Environment
Application of space technology to the design of sustainable settlements in hot deserts: Bioregenerative life support systems
Water scarcity in hot deserts, which cover about one-fifth of the Earth’s land area, along with rapid expansion of hot deserts into arable lands is one of the key global environmental problems. Thi…
Received 31 October 2009 00:00 UTC; Posted 02 November 2009
Posted to: Earth & Environment
On biological homochirality
Generalizing Landau’s spontaneous symmetry breaking arguments using the standard groupoid approach to stereochemistry allows reconsideration of the origin of biological homochirality. On Earth, lim…
Received 26 October 2009 13:56 UTC; Posted 26 October 2009
Posted to: Chemistry, Earth & Environment, Evolutionary Biology
Earth History and the Evolution of Caribbean Bats
Although the natural history of the Caribbean is better understood now than ever before, a general biogeographic explanation for the peculiar faunal composition of the islands remains elusive. New …
Received 25 October 2009 21:28 UTC; Posted 26 October 2009
Posted to: Earth & Environment, Evolutionary Biology
Roman roads: The hierarchical endosymbiosis of cognitive modules
Serial endosymbiosis theory provides a unifying paradigm for examining the interaction of cognitive modules at vastly different scales of biological, social, and cultural organization. A trivial bu…
Received 22 October 2009 16:47 UTC; Posted 02 November 2009
Posted to: Ecology, Neuroscience, Earth & Environment, Evolutionary Biology
Performance of the ALOGPS 2.1 program for octanol-water partition coefficient prediction with organic chemicals on the Canadian Domestic Substances List
The KOWWIN and ALOGPS octanol-water partition coefficient (Kow) estimation software programs were compared for their capacity to accurately predict log Kow values of 1596 organic compounds on t…
Received 21 October 2009 04:30 UTC; Posted 21 October 2009
Posted to: Chemistry, Pharmacology, Earth & Environment
A Comparative Study of the Magnitude, Frequency and Distribution of Intense Rainfall in the United Kingdom
During the 1960s, a study was made of the magnitude, frequency and distribution of intense rainfall over the UK, employing data from more than 120 daily-read rain gauges covering the period 1911 to…
Received 09 October 2009 23:36 UTC; Posted 12 October 2009
Posted to: Earth & Environment
Study of Echinoids of Gurpi formation, Iran
In order to detailed study of Echinoids, some samples are collected from Brown limestone member of Seimare from Gurpi Formation with 213 meter thickness which located in the vicinity of Ilam provin…
Received 01 November 2009 17:58 UTC; Posted 02 November 2009
Posted to: Earth & Environment, Evolutionary Biology
Theoretical studies on the pKa values of perfluoroalkyl carboxylic acids: Non-helical conformation acidity constants for n-perfluorooctanoic acid (n-PFOA)
A molecular mechanics force field method (MMFF94) systematic rotor conformational search was conducted on the well known environmental contaminant n-perfluorooctanoic acid (n-PFOA). The MMFF94 con…
Received 08 October 2009 03:17 UTC; Posted 08 October 2009
Posted to: Chemistry, Earth & Environment
Theoretical studies on the pKa values of perfluoroalkyl carboxylic acids: Chain helicity
Semiempirical, ab initio, and density functional theory (DFT) studies were conducted on a homologous series of straight chain perfluoroalkyl carboxylic acids (PFCAs) ranging in chain length from C~...
Received 06 October 2009 04:37 UTC; Posted 06 October 2009
Posted to: Chemistry, Earth & Environment
