The phosphatides and oil in unroasted and roasted coffee beans

1946 ◽  
Vol 23 (1) ◽  
pp. 19-20 ◽  
Author(s):  
Bruno Rewald
Keyword(s):  
Roasted Coffee ◽  
Coffee Beans ◽  
Roasted Coffee Beans

scholarly journals Analysis of Volatile Compounds in Coffee Prepared by Various Brewing and Roasting Methods

Foods ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1347
Author(s):  
Ja-Myung Yu ◽  
Mingi Chu ◽  
Hyunbeen Park ◽  
Jooyeon Park ◽  
Kwang-Geun Lee
Keyword(s):  
Volatile Compounds ◽  
Extraction Methods ◽  
Measured Signal ◽  
Roasted Coffee ◽  
Green Coffee Beans ◽  
Coffee Beans ◽  
Espresso Coffee ◽  
Roasting Temperature ◽  
Roasted Coffee Beans ◽  
Significant Factors

Volatile compounds of coffee brewed under various roasting conditions and by different brewing methods were analyzed. Green coffee beans (Coffea arabica) were roasted at 235 °C for 13 min, 240 °C for 15 min, and 245 °C for 17 min. Roasted coffee beans were ground into particles of three different sizes (710, 500, and 355 μm) and brewed by an espresso coffee machine and the cold brew method. Three types of water (filtered, tap, and bottled) were used for coffee extraction. SPME-GC-MS results indicated that increasing the roasting temperature and time increased the levels of 2,2′-methylene-bis-furan, guaiacol, and 4-ethylguaiacol (p < 0.05) and decreased the levels of furfural (p < 0.05). Grind size was inversely proportional to the measured signal of volatiles by GC-MS (p < 0.05). The measured GC/MS intensities of 2-methylpyrazine, 2,5-dimethylpyrazine, and 2-methoxy-4-vinylphenol were significantly higher in coffee brewed with filtered water (p < 0.05) than tap and bottled water. 2-Methylpyrazine, 1-methylpyrrole, and 2-acetylfuran were the most abundant components in the cold brew. Overall, roasting conditions and extraction methods were determined to be significant factors for volatile compounds in coffee. This is the first study showing the analysis of volatile compounds in coffee according to various types of water and extraction methods, such as espresso and cold brew coffee.

Comparison of Extraction Methods for Caffeine, Chlorogenic Acids and Trigonelline in Green and Roasted Coffee Beans

2001 ◽  
Author(s):  
Adriana S. Franca ◽  
Leandro S. Oliveira ◽  
Maria Lúcia A. Borges ◽  
Vany P. Ferraz
Keyword(s):  
Extraction Methods ◽  
Chlorogenic Acids ◽  
Roasted Coffee ◽  
Coffee Beans ◽  
Roasted Coffee Beans

Comprehensive multidimensional GC for the characterization of roasted coffee beans

2004 ◽  
Vol 27 (5-6) ◽  
pp. 442-450 ◽  
Author(s):  
Luigi Mondello ◽  
Alessandro Casilli ◽  
Peter Quinto Tranchida ◽  
Paola Dugo ◽  
Rosaria Costa ◽  
...  
Keyword(s):  
Roasted Coffee ◽  
Coffee Beans ◽  
Roasted Coffee Beans

Catechol - an Oviposition Stimulant for Cigarette Beetle in Roasted Coffee Beans

2014 ◽  
Vol 40 (5) ◽  
pp. 452-457 ◽  
Author(s):  
Atsuhiko Nagasawa ◽  
Yuji Kamada ◽  
Yuji Kosaka ◽  
Naohiro Arakida ◽  
Masatoshi Hori
Keyword(s):  
Oviposition Stimulant ◽  
Roasted Coffee ◽  
Cigarette Beetle ◽  
Coffee Beans ◽  
Roasted Coffee Beans

Role of Water State and Mobility on the Antiplasticization of Green and Roasted Coffee Beans

2011 ◽  
Vol 59 (15) ◽  
pp. 8265-8271 ◽  
Author(s):  
Pietro Rocculi ◽  
Giampiero Sacchetti ◽  
Luca Venturi ◽  
Mauro Cremonini ◽  
Marco Dalla Rosa ◽  
...  
Keyword(s):  
Roasted Coffee ◽  
Water State ◽  
Coffee Beans ◽  
Roasted Coffee Beans
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