The Distribution of Ar and Xe Inside Diamond Grains from Efremovka

Analysis of the release pattern of Ar and Xe from grain size fractions of Efremovka presolar diamonds at stepped combustion and pyrolysis indicates that in both cases the gases release as a result of destruction of the diamond lattice

Separation of Q from carbon in CR meteorites during stepped combustion

Introduction: The nature of the planetary noble gas carrier (Q) in meteorites remains uncertain. It is known that it is likely to be carbonaceous, but represents only a small fraction of the total macromolecular material. Q is oxidisible with nitric and other oxidizing acids. It seems to be partly destroyed with pyridine and may have an organic structure. Previously, we have shown that during parent body thermal metamorphism Q is less affected than the majority of other carbonaceous materials. If organic matter is graphitized, as has happened in the enstatite chondrite parent bodies, Q remains unaffected. In the present study we have found that Q is also separable from the majority of carbon in type 2 and 3 CR chondrites during stepped combustion. It is possible that this is because Q has become encased within the matrix, in contrast to other carbon phases, during parent body metamorphism

Presolar diamonds in Krymka: C, N and Xe isotope data from grain-size separates and comparison with other meteorites

Comparison of carbon isotope variations in grain size fractions of presolar diamonds separated from three meteorites (Efremovka, Boriskino and Krymka) suggest that diamond from various parts of solar nebular have had diffrent C isotope signature

On the variations of the elemental composition of the P3 component in presolar diamonds

Analysis of noble gas element variations in the P3 component of presolar diamonds indicates that a special mechanism of element fractionation is required to explain the variations

Is Xe-HL a real component?

Analysis of noble gases in the grain-size fractions of Boriskino meteorite indicate that Xe-HL is a real component implanted into diamonds after mixing of isotopically anomalous and normal components

Característica do estilo individual de Vasily Vasilyevich Rozanov

The present article analyzes the individual style of the famous Russian philosopher, writer, prose writer, and journalist, Vasily Vasilyevich Rozanov. It is proved that the writer's idiostyle is unique in Russian literature of the late 19th and early 20th centuries. The formation of an individual style took place in three stages. At the first stage, the philosophical treatise “On Understanding” was created, in which the categories of knowledge, wisdom, etc. were subjected to philosophical analysis. At the second stage, Rozanov’s individual style, the critic, was formed. In this period, the individual style is characterized by inconsistency. At the third stage, Rozanov’s individual style is formed, a prose writer, the key characteristics of whose style were unsystematic, contradictory and antinomic.El presente artículo describe el estilo individual de la famosa rusa, escritor, prose escritor, y periodista, Vasily Vasilyevich Rozanov. Se trata de que el escritor de los idiostyle es único en los ríos de los Estados Unidos y de los últimos 20 años. La formación de un estilo individual tuvo lugar en tres etapas. En la primera etapa, se creó la filosofía táctica "On Understanding" en las categorías de conocimiento, sabiduría, etc. se han inscrito en el análisis filosófico. En la segunda etapa, Rozanov el estilo individual, la crítica, fue formada. En este período, el estilo individual se considera inconsistencia. En la tercera etapa, Rozanov's individual estilo se ha formado, la prose de escritor, la clave de su estilo han sido unsystematic, contradictoria y antinomic.O presente artigo analisa o estilo individual do famoso filósofo, escritor, escritor de prosa e jornalista russo Vasily Vasilyevich Rozanov. Está provado que o idiostilo do escritor é único na literatura russa do final do século XIX e início do século XX. A formação de um estilo individual ocorreu em três etapas. No primeiro estágio, foi criado o tratado filosófico "On Understanding", no qual as categorias de conhecimento, sabedoria, etc. foram submetidos à análise filosófica. Na segunda etapa, o estilo individual de Rozanov, o crítico, foi formado. Nesse período, o estilo individual é caracterizado por inconsistência. No terceiro estágio, formou-se o estilo individual de Rozanov, um escritor de prosa cujas característicaschave de cujo estilo eram não sistemáticas, contraditórias e antinômicas

Optical effects of regolith processes on S asteroids as simulated by laser impulse alteration of ordinary chondrite

The spectral properties of some powdered chondrites and minerals altered by Isser impulse are studied in order to estimate possible optical effects of regolith processes (micrometeoritic bombardment). Gradual reduction of overall reflectance and spectral contrast, the increase of continuum slope, the increase of spectrally derived olivine/pyroxene ratio and Fs content of orthopyroxene with increasing alteration degree show that regolith processes could affect optical properties of surface material more heavily than has been previously appreciated. Ordinary chondrites (OC's) are known to account for 80 percent of observed meteorite falls, but so far no main belt parent bodies have been identified for these meteorites. S-asteroids resemble OC's spectrally, but are characterized by a steeper red continuum unlike that of OC's and their spectrally derived mineralogies are far outside OC range. Attempts were made to explain the spectral mismatch between OC's and S asteroids by some process, which alters optical properties of uppermost regolith. However, the spectral studies of shocked (black) OC's, gas-rich OC's, melted OC's and synthetic metal-rich regoliths derived from OC's demonstrate that such altered OC materials darken, but do not redden