Results 291 to 300 of about 2,786,318 (328)
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2013
Abstract The overall chemical composition of metals and alloys is most commonly determined by x-ray fluorescence (XRF) and optical emission spectroscopy (OES). High-temperature combustion and inert gas fusion methods are typically used to analyze dissolved gases (oxygen, nitrogen, and hydrogen) and, in some cases, carbon and sulfur in ...
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Abstract The overall chemical composition of metals and alloys is most commonly determined by x-ray fluorescence (XRF) and optical emission spectroscopy (OES). High-temperature combustion and inert gas fusion methods are typically used to analyze dissolved gases (oxygen, nitrogen, and hydrogen) and, in some cases, carbon and sulfur in ...
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2012
Abstract This chapter focuses on the chemical composition of pepper fruits, i.e. water, fixed (fatty) oils, steam-volatile oil, carotenoids, resin, protein, fibre and minerals, among others. The importance of these compounds in the nutritive value, taste, colour and aroma of pepper fruits are also discussed.
P. W. Bosland, E. J. Votava
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Abstract This chapter focuses on the chemical composition of pepper fruits, i.e. water, fixed (fatty) oils, steam-volatile oil, carotenoids, resin, protein, fibre and minerals, among others. The importance of these compounds in the nutritive value, taste, colour and aroma of pepper fruits are also discussed.
P. W. Bosland, E. J. Votava
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Natural product propolis: chemical composition
Natural Product Research, 2005The chemical composition of propolis from East Mediterranean (Hatay, Adana and Mersin) was studied in order to determine the major compounds by using GC-MS. In this study, the ethanolic extract of propolis prepared by mixing 1900mL 70% ethanol and 100g propolis was used.
Sahinler N., Kaftanoglu O.
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Advanced Photonics, 2014
High-temperature stable fiber Bragg gratings will be reviewed with an emphasis on recent material studies using Chemical Composition gratings.
Patrik Holmberg, Michael Fokine
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High-temperature stable fiber Bragg gratings will be reviewed with an emphasis on recent material studies using Chemical Composition gratings.
Patrik Holmberg, Michael Fokine
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CHEMICAL COMPOSITION OF I.U.C.D.s
The Lancet, 1970Mr. Mills clinical survey on IUDs in your issue of October 31 (p. 921) is timely. This method of conception control has evoked only limited professional interest in this country and little research effort had gone into its development. It is becoming evident that the mode of action of the IUD is essentially chemical rather than physical.
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Initial litter chemical composition
2003As regards chemical composition, foliar litter appears to be the most studied group of litter. The main organic litter compounds are cellulose, a group of hemicelluloses and lignin, the latter often measured as acid unhydrolyzable residue (AUR). In addition, there are several polymeric compounds including suberins, tannins, and cutins.
Björn Berg, Charles McClaugherty
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2012
The chemical composition of stellar matter is obviously very important, since it directly influences such basic properties as absorption of radiation or generation of energy by nuclear reactions. These reactions in turn alter the chemical composition, which represents a long-lasting record of the nuclear history of the star.
Rudolf Kippenhahn +2 more
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The chemical composition of stellar matter is obviously very important, since it directly influences such basic properties as absorption of radiation or generation of energy by nuclear reactions. These reactions in turn alter the chemical composition, which represents a long-lasting record of the nuclear history of the star.
Rudolf Kippenhahn +2 more
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1994
Abstract The first questions to be asked about a surface are: what atoms are present and what are their concentrations? If techniques can be found to provide the answers to these questions, then the next, more detailed, question is: how are the atoms bound to each other? These are the questions of surface chemistry.
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Abstract The first questions to be asked about a surface are: what atoms are present and what are their concentrations? If techniques can be found to provide the answers to these questions, then the next, more detailed, question is: how are the atoms bound to each other? These are the questions of surface chemistry.
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