• 한국축산식품학회지
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• 제43권3호
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• pp.540-551
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• 2023

Milk protein concentrate (MPC) is widely used to enhance the stability and texture of fermented dairy products. However, most research has focused on yogurt products, and the effects of MPC on sour cream characteristics remain unknown. Therefore, we investigated the effects of different MPC levels (0%, 1%, 2%, and 3% w/w) on the rheological, physicochemical, microbiological, and aroma characteristics of sour creams in this study. We found that MPC supplementation stimulated the growth of lactic acid bacteria (LAB) in sour creams, resulting in higher acidity than that in the control sample due to the lactic acid produced by LAB. Three aroma compounds, acetaldehyde, diacetyl, and acetoin, were detected in all sour cream samples. All sour creams showed shear-thinning behavior (n=0.41-0.50), and the addition of MPC led to an increase in the rheological parameters (η_a,50, K, G', and G"). In particular, sour cream with 3% MPC showed the best elastic property owing to the interaction between denatured whey protein and caseins. In addition, these protein interactions resulted in the formation of a gel network, which enhanced the water-holding capacity and improved the whey separation. These findings revealed that MPC can be used as a supplementary protein to improve the rheological and physicochemical characteristics of sour cream.

• 식품기술
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• 제15권1호
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• pp.55-61
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• 2002

장내 균총 개선을 위하여 조합시킨 prebiotics와 probiotics는 최고의 건강 증진을 제공할 잠재성을 갖지만, 알맞은 균주선발이 필수적이다. 기능성 식품시장은 연간 15∼20% 성장하고 있고, 그 산업은 33백만 달러의 값어치가 있다(Hilliam, 2000). 기능성 식품은 nutraceuticals, designer foods, medicinal foods, therapeutic foods,superfoods, foodiceuticals와 medifoods로 알려져 있고 그 정의는 전통적인 영양소개념을 넘어선 건강증진 성분을 함유한 식품이라고 할 수 있다(Berner와 O'Donnell,1998). 식품은 phytochemicals, bioactive peptides, $\omega$-3 불포화 지방산, 그리고probiotics 또는 기능성을 갖게 되는 prebiotics의 부가에 의하여 변형될 수 있다(Berner와 O'Donnell, 1998)(표 1). 장관에서 살수 없는 균을 함유한 요구르트의 경우와 같은 다양한 발효 낙농식품 제조에 젖산균을 사용한 이래, 오늘날에는 발효식품에Lactobacillus acidophilus와 bifidobacteria 같은 probiotic 균을 사용하는 경향이다. Probiotic 식품은 살아 있는 미생물을 함유한 식품이고, 그 미생물은 충분한 양이살아 있는 상태로 장 속에 공급되었을 때에 미생물 균총을 개선하여 소비자 건강을 증진시키는 것이라고 할 수 있다(Fuller, 1992). 전통적으로, probiotics는 요구르트와 기타 발효식품에 사용되어 왔지만, 최근에는 드링크, 알약형, 캡슐형, 동결건조물과 같은 형태로도 공급되고 있다. 오늘날, 전세계에 sour cream, buttermilk, 요구르트, 분유와 frozen desserts 같은 식품에 bifidus acidophilus를 함유한 제품이 70개를 넘고 있으며, 일본에서만도 probiotic 미생물을 함유한 형태의 우유제품이 53종류 이상 개발되어 있다. Probiotics는 유럽에서도 매우 인기가 있지만, 주로 요구르트에 한정되어 사용되고 있다(Hilliam, 2000).

• Journal of Nutrition and Health
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• 제39권4호
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• pp.392-402
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• 2006

The purpose of this study was to compare the eating habit, food intake frequency and preferred food and taste of juvenile delinquents (100 numbers) and male high school students (100 numbers), using questionnaires from August to October 2004. 1) It was shown that the juvenile delinquents took more unbalanced diet (p<0.05), smoking (p<0.001) and drinking (p<0.001) than general students, while general students had more eating between meals (p<0.01). 2) The intake of food was a significant difference in white rices (p<0.01), bibimbab (p<0.001), kimbab (p<0.001), fried rice (p<0.001), ramen (p<0.001), jajangmyun (p<0.001), jambong (p<0.001), hamburger (p<0.001), pizza (p<0.001) and breads (p<0.05). The juvenile delinquents took more major food than that of general students in all the items except for white rice. It was observed, then, that the juvenile delinquents showed more intake of such subsidiary foods as bulgoki (p<0.001), roasted thin pork chops (p<0.001), grilled pork belly (p<0.001), pork cutlet (p<0.01), sweet and sour pork (p<0.001), chicken with ginseng (p<0.001), fried chicken (p<0.001), kimchi pot stew (p<0.01) and zucchini (p<0.05) than general students, with general students taking more kimchi (p<0.01) and fried or boiled soybean curd (p<0.01). The intake of dessert was a significant difference in yogurt (p<0.01), orange juice (p<0.001), cola (p<0.001), soft drinks (p<0.001), ion drinks (p<0.001), coffee (p<0.001), apple (p<0.01), banana (p<0.001), orange (p<0.001), cake (p<0.001), hot dog (p<0.001), ddokbokgi (p<0.01), mandu (p<0.001), fried fish paste (p<0.05), steamed korean sausage (p<0.001), fried foods (p<0.05), hem & sausage (p<0.001), cheese (p<0.001), ice-cream (p<0.001), candy (p<0.01), chocolate (p<0.001), mayonnaise (p<0.05), jam (p<0.01) and butter & margarine (p<0.01). Then, the juvenile delinquents were shown to entirely have more intake of all the desserts than those of general students. 3) Regarding preference of foods, it was shown that the juvenile delinquents preferred cereals (p<0.05), grilled pork belly (p<0.001), chicken with ginseng (p<0.01), anchovies and small fish (p<0.05), chicken with ginseng (p<0.05), seasoned spinach (p<0.001), seasoned zucchini (p<0.001), milk (p<0.05), coffee (p<0.001) and butter & margarine (p<0.05) while general students did egg (p<0.01), soybean sprout soup (p<0.001), boiled or fried potato (p<0.05), seasoned soybean sprout (p<0.05), boiled or fried soybean curd (p<0.01), fried foods (p<0.01) and snack (p<0.05). For their preference of tastes, hot taste (p<0.01) was higher in the juvenile delinquents. 4) Under general environments there was a change of the difference in their behaviour of pork cutlet (p<0.01) intake in accordance with other family and of milk (p<0.001) and butter & margarine (p<0.05) preference in accordance with growth in a big city between the two groups.

• Asian Pacific Journal of Cancer Prevention
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• 제13권10호
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• pp.5183-5188
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• 2012

Colorectal cancer remains one of the most widespread malignancies in the world. However, there is a lack of comprehensive studies considering colorectal cancer risk factors among Russian populations, particularly in Siberia. The aim of this investigation was to determine the impact of various lifestyle, dietary, family, and socioeconomical factors on colorectal cancer risk in South-East Siberia. We recruited 185 Russian colorectal cancer cases and 210 gender-, age-, and ethnicity-matched asymptomatic controls with no history of any malignant tumor, using a specially designed questionnaire to obtain relevant information. After the statistical analysis, we defined several significant factors affecting colorectal cancer risk. Among these were smoking (OR=2.13, 95%CI=1.4-3.24, P=0.0004), being overweight (BMI between 25-30, OR=2.45, 95%CI=1.49-4.03, P=0.0004), alcohol drinking (OR=8.73, 95%CI=5.49-13.87, P<0.0001), beer drinking (OR=9.24, 95%CI=5.14-16.61, P<0.0001), consumption of hard liquor (OR=9.37, 95%CI=5.92-14.82, P<0.0001), excessive red meat consumption (P<0.0001), excessive intake of red meat products (P<0.0001), excessive intake of dairy products (P<0.0001), excessive sour cream and cheese consumption (P<0.0001 and 0.0002, respectively), spicy food consumption (OR=2.87, 95%CI=1.9-4.33, P<0.0001), family history of gastrointestinal malignant tumors (OR=3.99, 95%CI=2.09-7.59, P<0.0001), and income exceeding twice the subsistence minimum (OR=5.34, 95%CI=3.35-8.53, P<0.0001). Certain factors, such as high concentration of salt in the food and precancerous colonic lesions, demonstrated borderline significance (OR=3.45, 95%CI=1.68-7.1, P=0.0008, and OR=5.25, 95%CI=1.94-14.22, P=0.001, respectively). Some factors were established as protective, like consumption of rye bread and both rye and wheat bread (OR=0.32, 95%CI=0.21-0.5, P<0,0001, and OR=0.07, 95%CI=0.02-0.21, P<0.0001, respectively), and also low concentration of salt in the food, although this was of borderline significance (OR=0.43, 95%CI=0.26-0.69, P=0.0006). ABO and Rhesus blood antigens were not associated with increased colorectal cancer risk. These results should be definitely applied for elaboration of programs of colorectal cancer prevention in Russia, particularly in Siberia.

• 한국식품조리과학회지
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• 제18권1호
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• pp.43-50
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• 2002

Frozen soy yogurts의 overrun은 모든 시료가 최고치에 도달하는 시간이 20분으로 동일하였으며 균주의 종류에 따라 B. bifidum 배양군의 overrun이 가장 높았고 B. infantis 배양군은 가장 낮았다. 반면 녹아내리는 정도는 이와 반대의 경향을 나타내어 B. infantis 배양군이 가장 많이 녹아내렸고 B. bifidum 배양군은 가장 적게 녹아내렸다. 동결에 의한 생균수의 변화에서는 초기 생균수와 유사하게 $10^{9}$ CFU/ml 이상을 나타내어 동결에 대한 저항력이 높았다. 관능적 특성 중 콩비린내는 시료간에 유의차없이 약하게 감지되었고 신맛과 단맛의 정도는 기호도로 평가하였는데 균주에 따른 유의차가 나타나 B. bifidum 배양군이 가장 좋게 평가되었고 B. infantis 배양군은 좋지 않게 평가되었다. 쓴맛은 B.bifidum 배양군과 B. breve 배양군의 경우 유의차없이 약하게 나는 것으로 평가되었고 B. infantis 배양군은 쓰게 평가되었다. 입안에서의 질감은 B.bifidum 배양군이 대체적으로 부드럽게 평가되었고 B. infantis 배양군은 거칠게 평가되었다. 입안에서의 녹는 정도는 유의차없이 보통 정도로 평가되었으며 전반적인 바람직성은 B. bifidum 배양군이 바람직하게 평가되었고 B. infantis 배양군은 바람직하지 않은 것으로 평가되었다. 한편 soy yogurts의 보수력, 점도는 균주의 종류에 따라 유의차가 나타나 B. bifidum 배양군에서 가장 높았고 B. infantis 배양군에서 가장 낮았다. Soy yogurts를 섭취하였을 때 인체 위장에서의 비피더스균의 생존가능성을 간접적으로 측정한 내산성 실험에 있어서도 모든 균주가 초기 생균수($10^{9}$ CFU/ml)보다 감소하였으나 $10^{8}$ CFU/ml 이상을 나타내어 비교적 우수하였다. 본 연구에서 대부분의 항목에서 올리고당의 종류에 따른 유의차는 없었으나 균주의 종류에 따라서는 유의차가 비교적 뚜렷이 나타났다. 따라서 frozen soy yogurts 제조시 가격면에서 경쟁력이 있는 이소말토올리고당을 첨가하고, overrun이 가장 높았고 풍미, 질감, 전반적인 바람직성이 가장 좋았던 B.bifidum으로 배양시키는 것이 가장 바람직할 것으로 사료된다. 한편, 비피더스균은 건강에 유익하다는 증거가 있음에도 불구하고 영양요구가 복잡하고 혐기적 배양이 요구되는 까다로운 조건으로 인하여 식품 제조 및 저장 중에 비피더스균의 생존이 어렵기 때문에 그 이용이 제한되고 있다 따라서 앞으로는 B.bifidum과 상호보완작용을 가지고 있는 다른 젖산균주를 혼합배양함으로써 생육촉진시키고 또한 overrun을 좀더 증가시키기 위한 연구가 필요하다고 생각된다.