• Asian-Australasian Journal of Animal Sciences
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• 제14권10호
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• pp.1470-1476
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• 2001

Kou Woan Lao is an oriental-style dairy product, which is coagulated by milk-clotting enzyme from the culture filtrate of lao-chao. The product appears smooth, sweet, slightly wine flavour, and the flavour differs from yogurt. The aim of this study was to search for the optimum model to shorten the period of manufacture, and to improve the quality of Kou Woan Lao. A response surface design was used for studying the effects of addition of carrageenan, locust bean gum, and culture filtrate from lao-chao on the curd firmness, viscosity, and syneresis. Results indicated that the best rheological property, preservative quality and acceptability of Kou Woan Lao could be obtained by the combination of 0.22% carrageenan, 0.21 % locust bean gum and 12% culture filtrate from lao-chao. The curd firmness, viscosity and syneresis of resultant product were 29.3 g, 21,347.7 cps, and 8.92%, respectively and the microstructure of the curd revealed a relatively complete three-dimensional spider web-like structure.

• Asian-Australasian Journal of Animal Sciences
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• 제15권4호
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• pp.602-609
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• 2002

Lao-chao is a traditional Chinese fermented rice product with a sweet and fruity flavor, containing high levels of glucose, a little alcohol and milk-clotting characteristics. In order to optimize commercial production of lao-chao, Rhizopus javanicus and Saccharomyces cerevisiae were selected as the mold and yeast starter, respectively. A commercial mixed starter (chiu-yao) was used as control. Fermentation of the experimental combination revealed a sharp drop in pH (to 4.5) on the fourth day, remaining constant thereafter. Content of reducing sugars gradually decreased throughout the entire fermentation period. Of the free amino acids, higher quantities of alanine, leucine, proline, glutamic acid, glutamine and $NH_3$ were noted. For sugars, glucose revealed the highest concentration, while organic acid levels, including those for oxalic, lactic, citric and pyroglutamic acid, increased throughout the fermentation period. Twenty-one compounds were identified by gas chromatography from aroma concentrates of the lao-chao culture filtrate, prepared using the headspace method. For the flavor components, higher quantities of ethanol, fusel oil and ester were determined in both culture filtrates. In regard to the evaluation of yogurt-like product, there were significant differences in alcoholic smell, texture and curd firmness.

• Asian-Australasian Journal of Animal Sciences
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• 제18권3호
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• pp.409-413
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• 2005

The objective of this research was to combine the physiological functionality of probiotics (Lactobacillus acidophilus and Bifidobacterium longum) and the milk-clotting activity of culture filtrate from lao-chao to develop a new dairy product which was different from the commercial yogurt. Rhizopus javanicus and Saccharomyces cerevisiae were chosen as a mold and yeast starter for production of culture filtrate. The study results indicated that both probiotic counts increased with incubation time and maintained $10^7$-$10^8$ CFU/ml after 6 h incubation with 10-30% culture filtrates. By contrast, samples with 40% culture filtrates inhibited the growth of L. acidophilus and B. longum. The more culture filtrates were added, the lower titratable acidities and higher pH values in Kou Woan Lao were detected after 36 h fermentation. No significant differences (p>0.05) were found for both L. acidophilus and B. longum, when grown in differing concentrations of skim milk powders. Storage results showed both L. acidophilus and B. longum exhibited excellent stability for 14 days at $4^{\circ}C$ in the Kou Woan Lao.

• Journal of Nutrition and Health
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• 제51권6호
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• pp.580-589
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• 2018

본 연구는 라오스 비엔티안 지역 일부 청소년을 대상으로 식품 불안정 상태를 파악하고, 이에 따른 식행동 및 가공 음료 섭취를 비교하고자 진행되었다. 미국 농무부에서 개발한 식품 안정 조사 모듈을 통해 조사한 결과, 전체 714명의 대상자 중 519명, 즉 72.7%가 식품 불안정 상태로 나타났다. 식품 안정군 (Food Security, FS)이 식품 불안정군 (Food Insecurity, FI)에 비해 '삶에 대한 만족도', '부모의 교육 수준', '가정 내 소유하고 있는 물품의 수'가 더 높았고 '형제자매 수'는 더 적었던 것을 통해 식품 불안정이 낮은 사회 경제적 상태 (socioeconomic status, SES)와 유의한 관계가 있음을 확인할 수 있었다. FI군보다 FS군의 가공 음료 섭취 및 점심 식사를 밖에서 사 먹는 비율이 유의적으로 더 높게 나타난 것 역시 FI군의 낮은 SES가 반영된 결과라고 생각할 수 있다. 본 연구에서 가장 주목할 만한 결과는 FS군이 FI군에 비해 '아침 식사 섭취 빈도' 및 '스스로 평가한 식사의 질', '간이 식생활 진단'을 통해 평가한 결과의 총점이 더 높게 나타났으나, '식품 안정'에서 높은 수준의 가공 음료 섭취 가능성 또한 1.544배 증가하였다는 것이다. 이는 낮은 식사의 질이 단지 식품 불안정에 따른 문제가 아님을 의미하므로, 라오스 청소년을 대상으로 한 체계적인 영양 교육 및 정책 마련은 추후 빠르게 진행되어야 할 것으로 사료된다.