Results 221 to 230 of about 109,326 (267)

Volatile Components of Green Walnut Husks

Journal of Agricultural and Food Chemistry, 2000
Volatiles were isolated from whole green mature walnuts (Hartley variety) with husks still intact using dynamic headspace sweeping with trapping on Tenax. A total of 45 volatile compounds were identified by GC-MS. Major volatiles identified included (E)-4, 8-dimethyl-1,3,7-nonatriene, pinocarvone, pinocarveol, myrtenal, myrtenol, (E,E)-4,8,12-trimethyl-
R G, Buttery, D M, Light, Y, Nam, G B, Merrill, J N, Roitman   +4 more
openaire   +2 more sources

Evaporation of volatile component from intermetallic granule with non-volatile component shell

Vacuum, 1999
Abstract A problem of evaporation of a volatile component A from a spherical granule with an intermetallic core A n B m and a protective shell of a nonvolatile component B has been studied. Solution of the given problem (which belongs to the so-called Stefan's-type problems with two moving boundaries) was obtained by asymptotic method.
K.A. Chuntonov, V.G. Postovalov, A.G. Kesarev   +2 more
openaire   +1 more source

Volatile Components ofCleistopholis patens

Planta Medica, 1988
Volatile oils of the leaves, fruits and stem-bark of CLEISTOPHOLIS PATENTS Engl. et Diels. (Annonacae) were analysed by means of gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). A total of sixty-one components were identified; qualitative and quantitative differences in the oil composition were observed. The leaf oil contained (
O, Ekundayo, I, Laakso, B, Oguntimein, R, Hiltunen   +3 more
openaire   +2 more sources

Volatile components of chayote

Phytochemistry, 1990
Abstract Using established procedures, volatile components of chayote were analysed for the first time. A total of 61 components ( ca 97% of the isolate) was positively identified, and a further four components ( ca 2%) were partially characterized.
openaire   +1 more source

Pricing Volatility of Stock Returns With Volatile and Persistent Components

SSRN Electronic Journal, 2007
This paper introduces a two-component volatility model based on first moments of both components to describe the dynamics of speculative return volatility. The two components capture the volatile and the persistent part of volatility, respectively. The model is applied to 10 Asia-Pacific stock markets. Their in-mean effects on returns are tested.
openaire   +3 more sources

ECONOMETRIC ANALYSIS OF VOLATILITY COMPONENT MODELS

Econometric Theory, 2014
Volatility component models have received considerable attention recently, not only because of their ability to capture complex dynamics via a parsimonious parameter structure, but also because it is believed that they can handle well structural breaks or nonstationarities in asset price volatility.
Wang, Fangfang, Ghysels, Eric
openaire   +2 more sources

Volatile components in Andalusian vinegars

Zeitschrift für Lebensmittel-Untersuchung und -Forschung, 1987
The volatile fraction of different wine vinegars from Andalusia was studied, using gas chromatography. The identification of the peaks was based on the internal standard method. An outstanding content of volatile components was observed. High amounts were obtained for ethyl and methyl acetate as well as for isoamyl alcohols, which are the ...
Ana María Troncoso González, M. Guzmán Chozas   +1 more
openaire   +1 more source

Volatile components of violet leaves

Phytochemistry, 1992
Abstract Volatile components of violet leaves were extracted with 1,1,2-trichloro-1,2,2-trifluoroethane as well as hexane and analysed using GC, GC-MS and GC-FTIR. Quantitatively, the yields of leave solids varied greatly according to the experimental parameters. Qualitatively, the chemical composition differs with respect to the solvent used.
Jian Qin Cu, Francis Perineau, Antoine Gaset   +2 more
openaire   +1 more source

Volatile components of purple starthistle

Journal of Agricultural and Food Chemistry, 1990
Volatile components of purple starthistle (Centaurea calcitrapa L.) flowerhead buds, flowers, leaves, and stems were identified by gas chromatography-mass spectrometry. Of the 54 compounds identified, 49 were not previously reported in purple starthistle.
Ronald G. Binder, Charles E. Turner, Robert A. Flath   +2 more
openaire   +1 more source

Volatile components of Manchego cheese

Journal of Dairy Research, 1991
SummaryVolatile components of four batches of Manchego cheese were studied throughout their ripening process. Samples were submitted to a micro simultaneous distillation-extraction procedure, and then analysed by capillary gas chromatography (GC) and combined GC and mass spectrometry.
Isabel Martínez-Castro, Jesus Sanz, Lourdes Amigo, Mercedes Ramos, Pedro Martín-Alvarez   +4 more
openaire   +1 more source