Oxidation of methane to methanol with hydrogen peroxide in situ in the presence of glutathione-stabilized gold nanoclusters under mild conditions

Russian Chemical Bulletin - Oxidation of methane with a hydrogen-air mixture at 70 °C and a partial pressure of methane of 30 atm was studied. Water-soluble glutathione-stabilized nanoclusters...     

Crystallization of Calcium Phosphates from the Prototype of Blood Plasma in the Presence of Inorganic and Organic Impurities

Crystallography Reports - The crystallization processes in solutions modeling the human blood plasma composition have been investigated. It is revealed that the solid phases consist of OH-deficient...     

A Spectrophotometric Study of the Complexation of Magnesium(II) with a Number of Amino Acids in Aqueous Solutions

Russian Journal of General Chemistry - A spectrophotometric study of the complexation of magnesium(II) with glycine, L-aspartic, and L-glutamic amino acids in an aqueous solution at 298.15 K was...     

Crystallization specifics of carbonate-hydroxylapatite in the presence of strontium-containing agents

The effect of strontium-containing compounds on the crystallization of strontium-substituted carbonate- hydroxylapatite from a human synovial fluid prototype was studied. Synthesis products were investigated by FT-IR spectroscopy, X-ray diffraction, and differential thermal analysis. The amount of strontium in samples was determined by atomic emission analysis. For the synthesized phases, crystallite sizes were calculated by the Selyakov–Sherer formula, and the unit cell parameters were determined. The kinetically stable brushite phase was shown to transform into the more thermodynamically stable phase of strontium-containing carbonate-hydroxylapatite with increasing exposure time of precipitates under the mother solution. Some schemes were proposed for phase transformations under heat treatment.     

Protective properties of gold in the composition of nanoparticles and Au—rutin complexes

Protective properties of gold nanoparticles and gold—rutin complexes were studied. Aurophilic bacteria Micrococcus luteus and methanotrophic bacteria Methylococcus capsulatus were studied. Gold—rutin nanoparticles and complexes protect the respiratory activity of the bacteria against toxins. Pretreatment of the cells with gold is more efficient than the treatment after the action of toxin.     

Effect of Oxygen on the Oxidation of Methane with Hydrogen Peroxide to Methanol in the Presence of Glutathione-Stabilized Gold Nanoclusters

Kinetics and Catalysis - The catalytic activity of glutathione-stabilized gold thiolate nanoclusters (1–2 nm) in the oxidation of methane with H2O2 and air oxygen in aqueous medium at...     

Determination of the elemental composition of human bone tissue by atomic emission spectral analysis

We have developed a procedure for quantitative determination of the elemental content (Ca, P, Mg, Fe, Mn, Al, Si, Sr, Ti) in human bone tissue by atomic emission spectral analysis. We have determined the metrological characteristics of this method. We have established the characteristic features of the qualitative and quantitative elemental content in pathology (using as an example bone tissue affected by coxarthrosis).     

Detection of synthetic components in food matrices using piezoelectric resonators

The adsorption of a mixture of volatile components from the vapor phase of synthetic flavoring agents on thin adsorbent films was studied using piezoelectric quartz microweighing. Conventional gas-chromatographic adsorbents and specific films of different nature were used as adsorbents. It was shown that synthetic flavoring agents, including those used in the production of foodstuffs, can be identified and their quality can be assessed. The use of an array of piezoelectric quartz microbalances with various films allowed the slightest changes in the composition of the equilibrium vapor phase of synthetic flavoring agents to be recorded. An algorithm using a universal database on piezoelectric quartz microweighing of flavoring agent vapors was proposed for detecting them in food products and revealing adulterations.     

On the stabilities of mercaptoalkylvinyl ethers

Conclusions The authors have reacted the divinyl ether of 2,2-bis(hydroxyethyl)disulfide with dialkyl phosphites, thus obtaining 2-(vinylhydroxy)ethane thiol — the first member of vinyl ethers containing a free hydroxyl group.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1591–1592, July, 1967.