نتایج جستجو برای: volatile components

تعداد نتایج: 425267  

Journal: :research journal of pharmacognosy 2014
y. shokoohinia a. yegdaneh g. amin a. ghannadi

laurus nobilis l. (sweet laurel) is one of the volatile oil bearing plants of lauraceae family. it is cultivated in different parts of iran and its leaves and fruits have been used in food, cosmetics and pharmaceutical industries. there are a few reports about the effects of some environmental conditions on the quality and quantity of laurel volatiles. the goal of our work was to search the sea...

Journal: :Journal of agricultural and food chemistry 2005
Jorge A Pino Judith Mesa Yamilie Muñoz M Pilar Martí Rolando Marbot

The volatile components of 20 mango cultivars were investigated by means of simultaneous distillation-extraction, GC, and GC-MS. Three hundred and seventy-two compounds were identified, of which 180 were found for the first time in mango fruit. The total concentration of volatiles was approximately 18-123 mg/kg of fresh fruit. Terpene hydrocarbons were the major volatiles of all cultivars, the ...

2016
James H. Sullivan Donald H. Robertson

iv Introduction 1 Methods 1 Results and Discussion 7 Summary 10 Figure 1 2 Figure 2 4 Table I 6 Table II Ö *

Journal: :Journal of oleo science 2014
Sota Nosaka Mitsuo Miyazawa

The volatile oil from Boletopsis leucomelas (Pers.) Fayod was extracted by hydrodistillation with diethylether, and the volatile components of the oil were analyzed by gas chromatography-mass spectrometry. The oil contained 86 components, representing 87.5% of the total oil. The main components of the oil were linoleic acid (15.0%), phenylacetaldehyde (11.2%), and palmitic acid (9.4%). Furtherm...

Journal: :Science 1967
J V Rodricks M Cushmac L Stoloff

muscle twitches and the increase in the frequency and amplitude of individual eye movements. While exhaustive observations of these phenomena were not made in this study, it was evident that the intensification of twitching and ocular motility seen in the controls was not present in the convulsed cats. On the other hand, the EOG components of the recordings on the 1st recovery day from the conv...

2002
Aldo Ferretti

Over 40 new compounds were isolated and identified from a cold-finger molecular distillate obtained from a dichloromethane extract of a lactose-casein browning system, in connection with studies on off-flavor development in dairy products. These compounds consist of 15 C-5 to C-14 furanics, five pyrazines, three pyrroles, three lactones, 2-acetylpyridine, acrolein, cyclopentanone, 2-methyltetra...

Journal: :Journal of oleo science 2009
Sukhontha Sukhonthara Chockchai Theerakulkait Mitsuo Miyazawa

The volatile oils from red and black rice bran were obtained by hydrodistillation using diethyl ester and the components of that oil were analyzed by capillary GC-MS. The volatile components of essential oil from red and black rice bran were analyzed by GC and GC-MS. One hundred twenty-nine (129) of volatile compounds were identified in red and black rice bran. Myristic acid, nonanal, (E)-beta-...

Journal: :Food technology and biotechnology 2014
Nicolas Venturini Toussaint Barboni Franck Curk Jean Costa Julien Paolini

The volatile and flavonoid compositions of the peel of Citrus medica L. var. Corsican fruits cultivated in Corsica were studied according to the maturity of the citron fruits measured using growing degree-days. Quantitative variation with the stage of development of the fruit was observed using gas chromatography, gas chromatography-mass spectrometry, and liquid chromatography-mass spectrometry...

2017
Tetsuya Takaishi

We study stock market instability by using cross-correlations constructed from the return time series of 366 stocks traded on the Tokyo Stock Exchange from January 5, 1998 to December 30, 2013. To investigate the dynamical evolution of the cross-correlations, crosscorrelation matrices are calculated with a rolling window of 400 days. To quantify the volatile market stages where the potential ri...

Journal: :Journal of chromatographic science 2014
Yue-Wei An Guang Hu Guo-Ping Yin Jing-Jing Zhu Qi-Wei Zhang Zhi-Min Wang Juan Peng Bin Fan

Simple gas chromatography-mass spectrometry (GC-MS) and high-performance liquid chromatography (HPLC) methods were developed for quantifying eight volatile compounds and 10 sesquiterpenoids, respectively. GC-MS analysis was performed on an HP-5MS capillary column (30 m×0.25 mm i.d.) coated with 0.25 μm film 5% phenyl-95% methylpolysiloxane and selected ion monitoring was used for quantification...

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