VOLATILE CARBONYL COMPOUNDS IN BARLEY AND MALTS
نویسندگان
چکیده
منابع مشابه
Preconcentration and analysis of trace volatile carbonyl compounds.
We describe a preconcentration device that may be suitable for quantitative analysis of trace volatile ketones and aldehydes in ambient air as well as in human breath. The approach is based on microreactor chips fabricated from silicon wafers. The microreactors have thousands of micropillars in microfluidic channels for uniformly distributing a gaseous sample flowing through the chips. The surf...
متن کاملProtocol for collection and HPLC analysis of volatile carbonyl compounds in breath.
This noninvasive method for collection and analysis of a wide range of aldehydes and ketones in human breath may enable assessment of lipid peroxidation and metabolic status in vivo. Breath samples are drawn through silica cartridges impregnated with 2,4-dinitrophenylhydrazine, which traps carbonyls as their hydrazone derivatives. The hydrazone derivatives are eluted from the cartridges with ac...
متن کاملCarbonyl Compounds Enols and Enolate Ons. Unsaturated and Polycarbonyl Compounds
ome of the most useful reactions of carbonyl compounds involve carbonhydrogen bonds adjacent to the carbonyl group. Such reactions, which can be regarded as the backbone of much synthetic organic chemistry, usually result in the replacement of the hydrogen by some other atom or group, as in the I I I I sequence H-C-C=O -+ X-C-C=O. The important examples we I I will consider in this chapter are ...
متن کاملThe Volatile Compounds and Bioactivity of Achillea sieheana Stapf. (Asteraceae)
The in vitro antioxidant and antimicrobial activities of the essential oil and methanolic extract of Achillea sieheana Staf. (Asteraceae) were investigated in this study. The chemical composition of the essential oil isolated by hydro-distillation from the aerial parts of A. sieheana was analyzed by GC–MS. Camphor (43.36%), Artemisia ketone (25.95%), 1.8-cineole (6.29%) and camphene (4.77%) wer...
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ژورنال
عنوان ژورنال: Journal of the Institute of Brewing
سال: 1964
ISSN: 0046-9750
DOI: 10.1002/j.2050-0416.1964.tb01964.x