Fermentation-enabled wellness foods: A fresh perspective

Application of UHPLC-Q/TOF-MS-based metabolomics in the evaluation of metabolites and taste quality of Chinese fish sauce (Yu-lu) during fermentation.

Umami, the fifth basic taste, is the inimitable taste of Asian foods. Several traditional and locally prepared foods and condiments of Asia are rich in umami. In this part of world, umami is found in fermented animal-based products such as fermented and dried seafood, and plant-based products from beans and grains, dry and fresh mushrooms, and tea. In Southeast Asia, the most preferred seasonings containing umami are fish and seafood sauces, and also soybean sauces. In the East Asian region, soybean sauces are the main source of umami substance in the routine cooking. In Japan, the material used to obtain umami in dashi, the stock added to almost every Japanese soups and boiled dishes, is konbu or dried bonito. This review introduces foods and seasonings containing naturally high amount of umami substances of both animal and plant sources from different countries in Asia.

/pdf/umami-taste-components-and-their-sources-in-asian-foods-d4jtppzrlx.pdf

Umami taste components and their sources in Asian foods.

The effect of inoculated or co-cultured halophilic lactic bacteria (Tetragenococcus halophilus) and yeasts (Zygosaccharomyces rouxii and Candida versatilis) on the quality of soy sauce 
moromi was investigated. Results showed no significant change in the major physicochemical properties of soy sauce moromi such as amino nitrogen, total acid, and reducing sugar at the end of fermentation, whereas the composition of free amino acids slightly changed with different fermentation patterns. In the sample inoculated with T. halophilus, the concentration of proline and tryptophan decreased by 18.83 and 50.87 % compared with the blank sample, whereas tyrosine and histidine increased by 32.41 and 27.04 %. In the sample inoculated with Z. rouxii and C. versatilis, the concentration of bitter-tasting lysine, tyrosine, and phenylalanine increased by more than 20 %, and the concentration of tryptophan decreased by 56.71 %. The proportion of amino acids with sweet taste increased by 0.8 % through the co-culture of the three strains. Meanwhile, the total amount of volatile compounds increased by 117.66, 23.28, and 216.88 % in the T. halophilus inoculated sample, two yeast strain inoculated sample, and three strain inoculated sample, respectively. Increased odour activity values of the nine compounds that mainly contributed to the flavour of moromi ranged from 1 to 7.87 times in the three strain inoculated sample. These findings revealed that the co-culture of the three strains during moromi fermentation was beneficial to the improvement of flavour of soy sauce moromi.

/pdf/effect-of-different-halophilic-microbial-fermentation-3qiq9aeqob.pdf

Effect of different halophilic microbial fermentation patterns on the volatile compound profiles and sensory properties of soy sauce moromi

Effect of guar gum coatings containing essential oils on shelf life and nutritional quality of green-unripe mangoes during low temperature storage.

Chemical and sensory changes associated Yu-lu fermentation process – A traditional Chinese fish sauce

Yu lu is a traditional Chinese fish sauce with a strong and distinctive odor. The volatile compounds in the fish sauce made from anchovy (Engraulis japonius) and the snakehead fish (Channa asiatica) were isolated by simultaneous distillation–solvent extraction (SDE) and analyzed by gas chromatography (GC) and mass spectrometry (MS). About 70 volatile compounds were identified, including 20 acids, 4 carbonyls, 14 nitrogen-containing compounds, 14 hydrocarbons, 8 esters, and 3 sulfur-containing compounds. The major contributors to the characteristic odor of the fish sauce are dimethyl disulfide, dimethyl trisulfide, propanoic acid, butanoic acid, 3-(methylthio)-propanol, 2-methylbutenal as well as some nitrogen-containing compounds. Nitrogenous and sulfurous compounds in the fish sauce made from anchovy were more abundant than the fish sauce made from snakehead, while snakehead fish sauce had a greater amount of volatile fatty acids. 3-(Methylthio) propanol could be another important contributor to the distinctive odor of fish sauce.

Analysis of Volatile Compounds in Traditional Chinese Fish Sauce (Yu Lu)

Method for three-stage type fast fermentation of fish gravy

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Chemical and sensory changes associated Yu-lu fermentation process – A traditional Chinese fish sauce

Analysis of Volatile Compounds in Traditional Chinese Fish Sauce (Yu Lu)

Method for three-stage type fast fermentation of fish gravy