Results 11 to 20 of about 475,858 (311)

Characterisation of the semi-volatile component of Dissolved Organic Matter by Thermal Desorption - Proton Transfer Reaction - Mass Spectrometry. [PDF]

open access: yesSci Rep, 2017
Proton Transfer Reaction – Mass Spectrometry (PTR-MS) is a sensitive, soft ionisation method suitable for qualitative and quantitative analysis of volatile and semi-volatile organic vapours. PTR-MS is used for various environmental applications including
Materić D   +6 more
europepmc   +8 more sources

Differentiation of Agaricus species and other homobasidiomycetes based on volatile production patterns using an electronic nose system [PDF]

open access: yes, 2003
Comparisons of the qualitative volatile production patterns between seven species of Agaricus, and between two of Volvariella and Pleurotus and one Coprinus species when grown at 25°C on agar media for 14d were made.
Calvo-Bado   +19 more
core   +1 more source

Effect of Different Drying Processes on the Quality of Ficus hirta Vahl.

open access: yesShipin gongye ke-ji, 2023
In order to comprehensive evaluate the quality of Ficus hirta Vahl., which were dried under sun, fumigated by sulfur dioxide, dried by vacuum freezing, and dried by hot air at 50 ℃, the contents of psoralen, total polyphenols, total flavones, soluble ...
Qing GUI   +5 more
doaj   +1 more source

Volatile and semi-volatile components of jetsam ambergris

open access: yesNatural Product Research, 2019
Volatile and semi-volatile compounds account for the odors, long valued in the perfumery industry, of the natural product, ambergris. Here we demonstrate application of solid phase micro extraction (SPME) and gas chromatography-mass spectrometry (GC-MS) to headspace analysis of the volatiles and semi-volatiles of jetsam ambergris. The samples collected
Michael J. Wilde   +3 more
openaire   +3 more sources

CO2-crystal wettability in potassic magmas. Implications for eruptive dynamics in light of experimental evidence for heterogeneous nucleation. [PDF]

open access: yes, 2017
The volatile content in magmas is fundamental for the triggering and style of volcanic eruptions. Carbon dioxide, the second most abundant volatile component in magmas after H2O, is the first to reach saturation upon ascent and depressurization.
Fanara, S.   +4 more
core   +1 more source

GC-MS Study of the Chemical Components of Different Aquilaria sinensis (Lour.) Gilgorgans and Agarwood from Different Asian Countries

open access: yesMolecules, 2018
As a traditional medicinal herb and valuable natural spice in China, Aquilaria sinensis (Lour.) Gilg has many significant pharmacological effects. Agarwood is the resinous heartwood acquired from wounded A.
Meng-Ru Wang   +5 more
doaj   +1 more source

Analysis of Volatile Aroma Components of Dry Sandy Soil-Grown Watermelon from Jingyuan, Gansu Province [PDF]

open access: yesShipin Kexue, 2023
In order to accurately evaluate the aroma quality of watermelon grown in dry sandy soil, the volatile aroma components of 9 major watermelon cultivars planted in Jingyuan, Gansu province were identified and analyzed using headspace solid phase ...
REN Kaili, SU Yongquan, ZHANG Huasheng, KONG Weiping, TANG Taoxia, CHENG Hong, ZHAO Shuchun, ZHU Zhengming
doaj   +1 more source

Origins of chemical diversity of back-arc basin basalts: a segment-scale study of the Eastern Lau Spreading Center [PDF]

open access: yes, 2009
We report major, trace, and volatile element data on basaltic glasses from the northernmost segment of the Eastern Lau Spreading Center (ELSC1) in the Lau back-arc basin to further test and constrain models of back-arc volcanism.
Asimow, Paul D.   +4 more
core   +2 more sources

Sublimation of a volatile component as a possible mechanism for thermoelectric material degradation

open access: yesФізика і хімія твердого тіла, 2022
A physical model of the sublimation of a volatile component from a thermoelectric material has been developed. On its basis, two versions of the mathematical description of the degradation process of thermoelectric material are presented.
Petro Gorskyi
doaj   +1 more source

Volatile component analysis of new hybrid varieties of Phalaenopsis

open access: yesGuangxi Zhiwu, 2023
Phalaenopsis was the genus with the highest ornamental and commercial values among orchids. Phalaenopsis with fragrance were rarely distributed in the market due to selection constraints, such as affinity, ploidy and breeding age.
Yan TONG   +9 more
doaj   +1 more source

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