The origin of urinary aromatic compounds excreted by ruminants. 2. The metabolism of phenolic cinnamic acids to benzoic acid.
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"The origin of urinary aromatic comp..." refers background in this paper
...When experimental periods were of more than 24 h duration (i.e. in Expts 1, 5 and 6 in which QA, CHCA, BA, 2OH-BA, 3,40H-BA, CA, 20H-CA, 30H-CA, 40H-CA, 3,40H-CA, 3Me0,40H-CA or CHL were infused; Tables 1 and 2, Martin, 1982) the U.V. absorbance of samples of the infusion solution was determined daily....
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...All acids were recrystallized twice from water and the following A,, and e values (in parentheses) found: 20H-BA Na+ salt, 230 nm (6500); 3,40H-BA, 254 nm (7620); 30H-CA Na+ salt, 271 nm (16760); 20H-CA Na+ salt, 269 nm (14580); 40H-CA Na+ salt, 284nm (19200); 3,40H-CA Na+ salt, 286nm (14920); 3Me0,40H-CA Na+ salt, 286 nm (14070); CHL, 324 nm (18 340)....
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...Aromatic acids in rumen jluid Rumen infusion of 2OH-CA, 30H-CA, 40H-CA, 3,40H-CA, 3Me0,40H-CA and CHL d l resulted in increased concentrations of 3-PPA in rumen fluid (Fig....
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...The molecular weights of 3,40H-CA; 3Me0,40H-CA and of CHL are 356, 370 and 530 respectively; the percentages of these acids excreted in the urine as BA, 3-PPA and CA after abomasal infusion were 23, 11 and 34% respectively (see Table 2)....
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...Three samples of coffee beans were used which contained between 42 and 71 g CHL/kg fresh weight....
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