Results 31 to 40 of about 1,915,802 (275)

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

open access: yesFoods, 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   +3 more
doaj   +1 more source

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

open access: yesFoods, 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   +4 more
doaj   +1 more source

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

open access: yesShipin 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 Compounds of the Cyanophyceae – A Review

open access: yesWater Science and Technology, 1983
A relationship between blue-green algae and off-flavours in water was reported as early as 1883. Continuing research has shown that two metabolites, geosmin and methylisoborneol are major contributors to unpalatable flavours in water and aquatic organisms.
Slater, G. P., Blok, V. C.
openaire   +1 more source

GC-MS analysis of honeybee products derived from medicinal plants

open access: yesBeni-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   +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

open access: yesIndonesian 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   +3 more
doaj   +1 more source

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

open access: yesAnais 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   +3 more
doaj   +2 more sources

Efficient degradation of sulfamethoxazole using unactivated and biochar-activated peroxymonosulfate: Mechanisms and performance comparison

open access: yesWater Cycle
Peroxymonosulfate (PMS)-based advanced oxidation processes are widely used in environmental purification. But the intrinsic oxidizing properties of unactivated PMS are often overlooked in pollutant degradation.
Xuhao Liu   +6 more
doaj   +1 more source

Non-enantioselective and enantioselective determination of microbial volatile organic compounds as tracer for human exposure to mould growth in buildings [PDF]

open access: yes, 2006
In the industrialized countries people spend 80 to 90 % of their time in indoor areas. About 5 % of the population are known to be sensitive or allergic to the more than 200 mould species that are found in the indoor environment today.
Heekmann, Sven
core   +1 more source

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