Lowe and Schiff (_loc.cit. _) have obtained products similar to tannins, the latter investigator by removing the elements of water from gallic acid, protocatechuic acid, salicylic acid, _m_-hydroxybenzoic acid, cresotinic acid, phloretinic acid, and pyrogallolcarboxylic acid. ❋ Georg Grasser (N/A)
With the introduction of the carboxylic group the tendency of condensation to diphenylmethane derivatives is lessened; by protocatechuic acid the tendency is nil. ❋ Georg Grasser (N/A)
The burning taste is due to a resin that produces protocatechuic acid when melted with potassa. ❋ Jerome Beers Thomas (1891)
Reduction in acrylamide formation was observed to be at its best during the initial stage of heating - where it was seen to reach up to 70 per cent for trolox, gallic acid and protocatechuic acid and up to 50 per cent for ferulic and caffeic acid. ❋ Unknown (2010)
Given that acrylamide formation was very low at 115 oC, a temperature of 125oC was chosen to examine the effects of phenolic compounds (trolox, ferulic acid, gallic acid, protocatechuic acid and caffeic acid) on acrylamide formation. ❋ Unknown (2010)
Roselle calyx extracts and protocatechuic acid could be potent agents in the prevention of food contamination by spoilage bacteria, claims a new study in a forthcoming issue of the journal Foodborne Pathogens and Disease. ❋ Unknown (2009)
And, according to the findings, the antibacterial activity of roselle calyx ethanol extract and protocatechuic acid was not affected by heat treatments from 25°C to 75°C and 25°C to ❋ Unknown (2009)
The researchers said they examined the antibacterial effects of the extracts coupled with protocatechuic acid against the five bacteria in ground beef and apple juice. ❋ Unknown (2009)
Roselle calyx extracts or protocatechuic acid at 5 or 10 mg was mixed with 100g of ground beef or 100mL of apple juice, while a control group was also set up that contained neither roselle calyx extracts nor protocatechuic acid. ❋ Unknown (2009)
And one millilitre of each test bacterial culture was added into beef and apple juice previously treated with or without roselle calyx extracts or protocatechuic acid. ❋ Unknown (2009)
The scientists maintain that after three days storage at 25°C, the addition of roselle calyx extracts and protocatechuic acid exhibited dose-dependent inhibitory effects against test bacteria in ground beef and apple juice, in which the roselle calyx ethanol extract showed greater antibacterial effects than the aqueous extract. ❋ Unknown (2009)
The results showed that the antibacterial effects of roselle calyx ethanol extract and protocatechuic acid were dose dependent and heat resistant. ❋ Unknown (2009)
Its main active ingredients were found to be protocatechuic aldehyde for diminishing inflammation and chlorogenic acid for bacteria and virus control.
Roselle calyx extracts and protocatechuic acid could be potent agents in the prevention of food contamination by spoilage bacteria, claims a new study in a forthcoming issue of the journal ❋ Unknown (2009)
03-Mar-2009 - Roselle calyx extracts and protocatechuic acid could be potent agents in the prevention of food ... ❋ Unknown (2009)
