Results 1 to 10 of about 2,125 (104)

Fermentation temperature and wort composition influence on diacetyl and 2, 3-pentanedione contents in beer [PDF]

Zbornik Matice Srpske za Prirodne Nauke, 2005
Diacetyl and 2,3-pentanedione are important constituents of beer sensory properties. A new GC/MS method for diacetyl and 2,3-pentanedione content determination was developed.
Pejin Jelena D., Grujić Olgica S., Markov Siniša L., Kocić Sunčica-Tanackov D., Cvetković Dragoljub D., Tanackov Ilija J.   +5 more
doaj   +2 more sources

Ultrasound effect on flavor profile of beef jerky produced with partial potassium salt substitute based on GC-IMS technology [PDF]

Ultrasonics Sonochemistry
Traditional beef jerky contains a high content of sodium salt while the reduction of sodium usage impairs the flavor of final product. Regarding above issues, this research innovatively applied ultrasound-assisted salts (NaCl and KCl) recombination in ...
Jian Zhang, Lei Jin, Jianjun Zhou, Chao Ma, Jie Cui, Jinchi Jiang, Wenhui Li, Si Wu, Wangang Zhang, Yonghong Hu   +9 more
doaj   +2 more sources

Case Study: Efficacy of Engineering Controls in Mitigating Diacetyl and 2,3-Pentanedione Emissions During Coffee Grinding

Frontiers in Public Health, 2022
Exposure to elevated levels of diacetyl in flavoring and microwave popcorn production has been associated with respiratory impairment among workers including from a severe lung disease known as obliterative bronchiolitis.
Marcia L. Stanton, Tia L. McClelland, Michael Beaty, Anand Ranpara, Stephen B. Martin   +4 more
doaj   +1 more source

Model Predictions of Occupational Exposures to Diacetyl and 2,3-Pentanedione Emitted From Roasted Whole Bean and Ground Coffee: Influence of Roast Level and Physical Form on Specific Emission Rates

Frontiers in Public Health, 2022
Roasted coffee emits hazardous volatile organic compounds including diacetyl and 2,3-pentanedione. Workers in non-flavored coffee roasting and packaging facilities might inhale diacetyl and 2,3-pentanedione from roasted coffee above occupational exposure
Ryan F. LeBouf, Anand Ranpara, Elizabeth Fernandez, Dru A. Burns, Alyson R. Fortner   +4 more
doaj   +1 more source

Determina tion of diacetyl and 2,3-pentanedione in beer by gc/ms using solid-phase extraction columns [PDF]

Acta Periodica Technologica, 2002
A new GC/MS method for the determination of diacetyl and 2,3-pentanedione was investigated. Diacetyl and 2,3-pentanedione were derivatized with 1,2-diaminobenzene to form 2,3-dimetylquinoxaline and 2-ethyl-3-methylquinoxaline. respectively.
Pejin Jelena D., Grujić Olgica S., Marjanović Nikola J., Vujić Đura N., Kocić-Tanackov Sunčica D.   +4 more
doaj   +1 more source

Enzymatic synthesis of vitamin B6 precursor [PDF]

Journal of the Serbian Chemical Society, 2013
3-Cyano-4-ethoxymethyl-6-methyl-2-pyridone is an important precursor in the synthesis of vitamin B6, obtained in the addition reaction between 2-cyanoacetamide and 1-ethoxy-2,4-pentanedione catalyzed by lipase from Candida rugosa ...
Prlainović Nevena Ž., Bezbradica Dejan I., Knežević-Jugović Zorica D., Veličković Dušan V., Mijin Dušan Ž.   +4 more
doaj   +1 more source

Case Report: Flavoring-Related Lung Disease in a Coffee Roasting and Packaging Facility Worker With Unique Lung Histopathology Compared With Previously Described Cases of Obliterative Bronchiolitis

Frontiers in Public Health, 2021
Occupational exposure to diacetyl, a butter flavor chemical, can result in obliterative bronchiolitis. Obliterative bronchiolitis is characterized by exertional dyspnea, fixed airflow obstruction, and histopathologic constrictive bronchiolitis, with ...
R. Reid Harvey, Brie H. Blackley, Eric J. Korbach, Ajay X. Rawal, Victor L. Roggli, Rachel L. Bailey, Jean M. Cox-Ganser, Kristin J. Cummings   +7 more
doaj   +1 more source

Decrements in lung function and respiratory abnormalities associated with exposure to diacetyl and 2,3-pentanedione in coffee production workers

Frontiers in Public Health, 2022
Coffee production workers are exposed to complex mixtures of gases, dust, and vapors, including the known respiratory toxins, diacetyl, and 2,3-pentanedione, which occur naturally during coffee roasting and are also present in flavorings used to flavor ...
Mohammed Abbas Virji, Ethan D. Fechter-Leggett, Caroline P. Groth, Xiaoming Liang, Brie H. Blackley, Marcia L. Stanton, Ryan F. LeBouf, R. Reid Harvey, Rachel L. Bailey, Kristin J. Cummings, Jean M. Cox-Ganser   +10 more
doaj   +1 more source

(3E)-4-[(Naphthalen-1-yl)amino]pent-3-en-2-one hemihydrate

IUCrData, 2021
The title compound, C15H15NO·0.5H2O, was prepared from α-naphthylamine and 2,4-pentanedione in a 1:1 ratio. An intramolecular N—H...O hydrogen bond in the N-naphthylpent-3-en-2-one molecule involving the amine and carbonyl groups strengthens the ...
Aboubacar Diop, Tidiane Diop, Cheikh Abdou Khadre Diop, Nikolay Tumanov, Zangrando Ennio, Mamadou Sidibé   +5 more
doaj   +1 more source

Metal complexes of Schiff’s bases derived from 3-(arylazo)-2,4- -pentanediones with 2-aminophenol and 2-aminothiophenol [PDF]

Journal of the Serbian Chemical Society, 2007
Phenylazo- and thiazolylazo-2,4-pentanediones on reaction with 2-aminophenol and 2-aminothiophenol yielded a new series of polydentate Schiff’s base ligands.
Krishnankutty K., Sayudevi P., Ummathur Basheer Muhammed   +2 more
doaj   +3 more sources