Mössbauer spectroscopy and the iron on Mars

Both the USSR and US have plans of performing rover missions and sample return missions to the planet Mars in the coming decade. There may be possibilities of performingin situ Mössbauer spectroscopy on Mars or on fresh samples returned to a space station.     

Relationships Between the Lipophilicity and Anticonvulsant Activity of N-Benzyl-2-azaspiro[4.4]nonane- and [4.5]decane-1,3-dione Derivatives

JPC – Journal of Planar Chromatography – Modern TLC - The lipophilicity of twenty-one N-benzyl-2-azaspiro[4.4]nonaneand [4.5]decane-1,3-dione derivatives, fifteen of which (1–15)...     

Iron as a risk factor in neurological diseases

In this review the properties of iron in various human brain structures (e.g. Substantia nigra, globus pallidus, hippocampus) were analyzed to assess the possibility of initiation of oxidative stress leading to such diseases as Parkinson’s and Alzheimer’s disease, and progressive supranuclear palsy. Our own studies with the use of Mössbauer spectroscopy, electron microscopy and enzyme-linked immuno-absorbent assay (ELISA) were confronted with other methods used in other laboratories. Our results suggest that hippocampus is the most fragile for oxidative stress structure in human brain (the death of nervous cells in hippocampus leads to Alzheimer’s disease). Changes in iron metabolism were also found in substantia nigra (the death of nervous cells of this structure produces Parkinson’s disease) and in globus pallidus (neurodegeneration of this structure causes progressive supranuclear palsy).     

Infrared study on electrolyte solutions in acetone part III. reactivity of acetone in aldolic condensation

Infrared spectra of perchlorate, halide and nitrate solutions in acetone are studied. The CO and CCC band frequency changes are discussed in terms of the electronic structure of acetone molecules complexed with cation and anion. The correlation between the shift of the CO and CCC bands and the reactivity of acetone molecules in aldolic condensation reaction is given. An explanation of the anion effect in aldolic condensation is proposed.     

An indirect flame emission spectrometry method for the determination of sulphur and sulphur compounds. II

Microchimica Acta - An accurate and simple indirect method of flame-emission spectrometric determination of small quantities of elemental sulphur and many sulphur compounds, without their prior...     

Traceability as a tool aiding food safety assurance on the example of a food-packing plant

Accreditation and Quality Assurance - Enabling the possibility of “tracing” the route of a food product is a legal requirement for all participants of the food chain. It allows...     

The influence of Lewis acid catalyst on the kinetic and molecular mechanism of nitrous acid elimination from 5-nitro-3-phenyl-4,5-dihydroisoxazole: DFT computational study

Chemistry of Heterocyclic Compounds - The molecular mechanism of nitrous acid elimination from 5-nitro-3-phenyl-4,5-dihydroisoxazole systems has been explored using DFT computational study. It was...     

Analysis of Cibacron blue F3G-A interaction with therapeutic proteins by MALDI-TOF mass spectrometry

The formation of the complexes between Cibacron blue F3G-A and two therapeutic proteins, recombinant human interferon-alpha2b and recombinant human growth hormone, was investigated. The method of time-resolved limited proteolysis coupled with MALDI-TOF mass spectrometry was used. The analysis of peptide maps revealed that A(17)HR(19) and L(20)HQLAFDTYQEFEEAYIPK(38) of hGH, and R(14)TLMLLAQMR(23) and D(33)RHDFGFPQEEFGNQFQK(50) of hIFN-alpha2b, exhibit affinity to Cibacron blue F3G-A. Copyright (c) 2008 John Wiley & Sons, Ltd.     

Separating sets by lower and upper semicontinuous functions with a closed graph

In this paper we characterize the pairs (A^?, A⁺) of disjoint subsets of perfectly normal topological space which can be separated by a lower and an upper semicontinuous function with a closed graph.