Results 11 to 20 of about 7,089 (170)

Benzylammonium heptanoate–heptanoic acid (1/1) [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2013
The title salt, C7H10N(+)·C7H13O2(-)·C7H14O2, is an unusual 2:1 stoichiometric combination of two carb-oxy-lic acid mol-ecules and one amine. Although there are crystal structures of a number of 1:1 complexes reported in the literature, 2:1 acid amine complexes are rather uncommon.
Wood, Mary H., Clarke, Stuart M.
openaire   +5 more sources

Using in situ GC-MS for analysis of C2–C7 volatile organic acids in ambient air of a boreal forest site [PDF]

open access: yesAtmospheric Measurement Techniques, 2017
An in situ method for studying gas-phase C2–C7 monocarboxylic volatile organic acids (VOAs) in ambient air was developed and evaluated. Samples were collected directly into the cold trap of the thermal desorption unit (TD) and analysed in situ ...
H. Hellén   +4 more
doaj   +1 more source

The gut microbiome promotes arsenic metabolism and alleviates the metabolic disorder for their mammal host under arsenic exposure

open access: yesEnvironment International, 2023
Gut microbiome can participate in arsenic metabolism. However, its efficacy in the host under arsenic stress is still controversial. To clarify their roles in fecal arsenic excretion, tissue arsenic accumulation, host physiological states and metabolism,
Linkang Chen   +11 more
doaj   +1 more source

Evaluation of Hemp Seed Oils Stability under Accelerated Storage Test

open access: yesAntioxidants, 2022
The interest in hemp seed oil has recently increased, due to the latest regulations which allow its use as food. Hemp seed oil is characterized by a high content of polyunsaturated fatty acids, which are highly prone to oxidation.
Matilde Tura   +4 more
doaj   +1 more source

Transforming micropores to mesopores by heat cycling KOH activated petcoke for improved kinetics of adsorption of naphthenic acids

open access: yesHeliyon, 2023
Formation of activated carbon from petroleum coke by KOH, results in high specific surface area materials that are predominantly microporous. This initial microporosity means that the adsorption kinetics of target species are not as rapid as they could ...
Oliver K.L. Strong   +5 more
doaj   +1 more source

Determination of the Fatty Acids in Beer by SPME.

open access: yesKvasný průmysl, 2005
An escalated content of fatty acids during fermentation can influence the quality of final beer. So it is necessary to use the suitable analytical method for the determination of their concentrations in beer or hopped wort.
Tomáš HORÁK   +4 more
doaj   +1 more source

Comprehensive Quality Evaluation for Medicinal and Edible Ziziphi Spinosae Semen before and after Rancidity Based on Traditional Sensory, Physicochemical Characteristics, and Volatile Compounds

open access: yesFoods, 2022
To comprehensively evaluate the quality of medicinal and edible Ziziphi Spinosae Semen (ZSS, the dried ripe seeds of Ziziphus jujuba var. spinosa) before and after rancidity during storage, some indicators including traditional sensory properties ...
Zhenying Liu   +6 more
doaj   +1 more source

Investigating the Impact of Ultrasound, Microwave, and High-Pressure Processing of Milk on the Volatile Compounds and Sensory Properties of Cheddar Cheese

open access: yesAgriculture, 2022
Each cheese type has a unique flavor. A variety of compounds of various concentrations and different chemical classes contribute to this flavor. In the present study, the effect of processing techniques (ultrasonication (US), high pressure processing ...
Masooma Munir   +8 more
doaj   +1 more source

Ambient Hydrocarbonylation of Olefins Enabled by Visible-Light. [PDF]

open access: yesAdv Sci (Weinh)
A novel photo‐induced methodology for hydrocarbonylation has been established, resolving the inherent conflicts between competitive olefin and CO insertion in traditional methods that necessitate harsh conditions. Accordingly, an efficient and versatile hydrocarbonylation of olefins enabled by visible‐light irradiation under ambient conditions has been
Liu H, Zhang T, Huang H.
europepmc   +2 more sources

An Improved Validated Method for the Determination of Short-Chain Fatty Acids in Human Fecal Samples by Gas Chromatography with Flame Ionization Detection (GC-FID)

open access: yesMetabolites, 2023
Short-chain fatty acids (SCFAs) are metabolites produced by the gut microbiota through the fermentation of non-digestible carbohydrates. Recent studies suggest that the gut microbiota composition, diet and metabolic status play an important role in the ...
Morganne Smith   +5 more
doaj   +1 more source

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