chemical composition of stars
Chemical Composition in Fast Rotators Main Sequence Stars
... study of the stars within a cluster allows one to assume the same age and chemical com- position for all the stars; then the observed changes in abundances can be related to the mass and ...
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Chemical composition of the stellar cluster Gaia1: No surprise behind Sirius
... The chemical composition of Gaia1 that we derived from MIKE spectra matches the composition of thin-disk stars and open clusters with similar metallicity well (see ...groups ...
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Deep high spectral resolution spectroscopy and chemical composition of ionized nebulae
... determination of C/O ratios in PNe is of paramount importance to constraint the occurrence of dif- ferent nucleosynthesis processes in asymptotic giant branch (AGB) stars, as well as to put ...
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Functional properties and applications of plasma polymerized hexamethyldisiloxane (ppHMDSO) thin films
... absorbers of some of the ...off of a flat mirror which is fixed in place. The other beam reflects off of a flat mirror which is on a moving mechanism which allows this mirror to move a very ...
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Parametric analysis of carbonation process in reinforced concrete structures through Artificial Neural Networks
... concentration, concrete compressive strength, cement type, exposure conditions, use and mix design of admixtures, and age of concrete). The database is composed by experimental results from Meira et al. ...
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Oligomerization of propene over ZSM-5 modified with Cr and W
... percentages of Cr and W for the catalysts. The procedure for the synthesis of Na-ZSM-5 was previously reported [8]; its proton form was produced by three consecutive ion exchanges with fresh water solutions ...
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Extraction, Chemical Composition And Antimicrobial Activity Of The Essential Oils Of Pipilongo ( Piper Tuberculatum) Using Supercritical Carbon Dioxide
... that of pepper. It is widely used as a precursor in the synthesis of several organic compounds including some ...one of the numerous natural alkaloids that gives to black pepper its spicy flavor and ...
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Aceites esenciales y sus constituyentes como una alternativa en el control de mosquitos vectores de enfermedades
... Essential oil composition, adult repellency and larvicidal activity of eight Cupressaceae species from Greece against Aedes albopictus (Diptera: Culicidae). Chemical compositions [r] ...
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Effect of Phosphorus Fertilization on the Chemical Composition of Lotus tenuis and Trifolium repens
... way of increasing forage yield and quality of natural pastures is through the inclusion of legumes in the grass ...availability of phosphorus (P) in the soil. Given the poor levels of ...
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Nondestructive quality evaluation and monitoring of Braeburn apples by Spatially Resolved Spectroscopy.
... presence of chlorophyll, and another at 970 nm, corresponding to water in the apple ...main chemical constituents which absorb most strongly in the range 600 – 1000 ...peak of group B at day 14 is ...
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Chemical abundances of 11 bulge stars from high resolution, near IR spectra
... Determination of abundances for a large sample of red giant stars and planetary nebulae ...models of the bulge (Matteucci & Romano 1999; Silk & Wyse ...spectroscopy of red-giant ...
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The effect of aging on element plant availability and bacterial counts of mixtures of wood ash and sewage sludge
... acidity of the Mehlich 3 reagent increased the solubility of molybdenum salts, given that the pH of the mixture remained alkaline throughout the experiment ...extracts of the mixture were much ...
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LC-ESI-HRMS-Based Chemical Characterization of Lupinus bogotensis Roots
... Plants of the genus Lupinus (Fabaceae) have been studied due to the occurrence of different com- pounds, especially those possessing quinolizidine and isoflavone-like ...kinds of compounds are ...
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Precursores de terremotos en las brechas sísmicas de Acapulco, Guerrero, México
... Ramírez - Guzmán A., Taran Y., Bernard R., Cienfuegos E., Morales Pedro. (2005). Variations in the Cl SO4 dD and d18O in water from thermal springs near Acapulco, Guerrero, Mexico, related to seismic activity. ...
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Antibacterial activity of Citrus paradisi essential oil
... EO of Citrus paradisi can be used as safer and alternative means of food preservation to minimize microbial contamination and to improve quality of foods as a shift from synthetic chemicals to ...
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A new method for the determination of wax precipitation from non-diluted crude oils by fractional precipitation
... part of the experimental system for fractional precipitation is the filter, which is ...mixture of ethylenglicol-water from a thermostatic bath in the range of 243K to ...top of the filter is ...
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Aceite esencial de Baccharis trimera (Less ) DC (carquejaamarga): actividad antimicrobiana
... changes of the studied bacteria. There was a change in the structure of the treated bacteria when compared to the negative ...cells of all microorganisms tested (negative control) showed cell ...
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Effect of thermal treatment variables on the thermogravimetric properties of eucalypt wood
... the chemical composition of the wood than the duration of the ...wood of two different species, Eucalyptus grandis and Pinus caribaea ...wood of the latter species. Thus, also ...
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H II Regions and Protosolar Abundances in Galactic Chemical Evolution
... those of Maeder ...massive stars are able to process He into C, and their stellar winds take away a lot of new ...fraction of heavy elements ejected during the wind ...mass of the CO ...
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