Results 31 to 40 of about 512,142 (300)

Analysis of Caffeine, Chlorogenic Acid, Trigonelline, and Volatile Compounds in Cold Brew Coffee Using High-Performance Liquid Chromatography and Solid-Phase Microextraction—Gas Chromatography-Mass Spectrometry

Foods, 2020
This study investigated the non-volatile and volatile compounds in samples of cold brew (CB) coffee, coffee from a coffee shop (CS), ready-to-drink (RTD) coffee, and brewed coffee from a coffee maker (CM).
JeongAe Heo, Koushik Adhikari, Kap Seong Choi, Jeehyun Lee   +3 more
doaj   +1 more source

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

, 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
Cook, Sarah, Gauci, Vincent, Holzinger, Rupert, Kent, Matthew, Materić, Dušan, Peacock, Michael, Rockman, Thomas   +6 more
core   +6 more sources

GC-MS analysis of honeybee products derived from medicinal plants

Beni-Suef University Journal of Basic and Applied Sciences, 2023
Background Honeybees provide a wealth of valuable natural products containing health-promoting bioactive compounds, including honey, bee bread, bee venom, bee pollen, propolis, and royal jelly.
Maha Montaser, Ahmed M. Sayed, Mokhtar M. Bishr, Ehab W. Zidan, Mohamed A. Zaki, Hossam M. Hassan, Rabab Mohammed, Mohamed S. Hifnawy   +7 more
doaj   +1 more source

Identification of Volatile Compounds of Oil Palm Flower (Elaeis guineensis Jacq.) with Gas Chromatography and Mass Spectrometry Based on the Difference in Time

Indonesian Journal of Chemistry, 2023
The pollination process in oil palm is assisted by the insect Elaeidobius kamerunicus, which occurs when male and female flowers bloom producing volatile compounds that act as attractants.
Fizrul Indra Lubis, Sudarjat Sudarjat, Ichsan Nurul Bari, Unang Supratman   +3 more
doaj   +1 more source

Non-conventional gas phase remediation of volatile halogenated compounds by dehydrated bacteria [PDF]

, 2009
Traditional biological removal processes are limited by the low solubility of halogenated compounds in aqueous media. A new technology appears very suitable for the remediation of these volatile organic compounds (VOCs). Solid/gas bio-catalysis applied
Erable, Benjamin, Goubet, Isabelle, Maugard, Thierry, Seltana, Amira   +3 more
core   +2 more sources

Effects of Different Fixation Methods on Volatile Organic Compounds in Fresh Leaves of ‘Qiancha No.1’ Tea [PDF]

Shipin Kexue
To explore the most suitable fixation method for the study of volatile organic compounds in fresh tea leaves, this study compared the effects of five fixation methods-steam fixation, hot air fixation, microwave fixation, vacuum freeze fixation, and ...
YANG Xianfeng, Zhang Tuo, Pang Dewen, Xi Yanan Zeng Tingting WANG Jing, ZHANG Xiaoqin,
doaj   +1 more source

Volatile aldehydes in libraries and archives [PDF]

, 2010
Volatile aldehydes are produced during degradation of paper-based materials. This may result in their accumulation in archival and library repositories. However, no systematic study has been performed so far.
Cassar, M., de Bruin, G., Fenech, A., Gibson, L.T., Kolar, J., Kralj Cigić, I., Levart, A., Ntanos, K., Strlič, M.   +8 more
core   +1 more source

Combined membrane process for dealcoholization of wines: Osmotic distillation and reverse osmosis [PDF]

, 2019
The demand of beverages with low or zero alcohol content is fast growing over the last years for health benefits of drinkers and more restrictive policies in alcohol consumption. Membrane processes are nowadays the most commonly used.
Albanese D., Cinquanta L., Corona O., Liguori L., Matteo M. D., Russo P.   +5 more
core   +2 more sources

Volatile Compounds of Different Fresh Wet Noodle Cultivars Evaluated by Headspace Solid-Phase Microextraction-Gas Chromatography-Mass Spectrometry [PDF]

Anais da Academia Brasileira de Ciências
This study was carried out to determine the volatile compounds from four samples of fresh wet noodles and the changes in the volatile compound composition during the storage process.
YAN WU, SHAN LIANG, YANYAN ZHENG, MIN ZHANG   +3 more
doaj   +2 more sources

Identification, Comparison and Classification of Volatile Compounds in Peels of 40 Apple Cultivars by HS–SPME with GC–MS

Foods, 2021
Aroma is an important quality indicator for apples and has a great influence on the overall flavour and consumer acceptance. However, the information of the aroma volatile compounds in apple peels is largely unknown. In this study, evaluation of volatile
Shunbo Yang, Nini Hao, Zhipeng Meng, Yingjuan Li, Zhengyang Zhao   +4 more
doaj   +1 more source