• Title/Summary/Keyword: milk and milk product

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영유아식의 안전성

  • 오상석
    • Proceedings of the Korean Society of Food and Cookery Science Conference
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    • 2003.10a
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    • pp.20-48
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    • 2003
  • Product in tended for use by infants that simulates human milk or is suitable as a complete or partial substitute for human milk (omitted)

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Experimental and Modelling Study of the Denaturation of Milk Protein by Heat Treatment

  • Qian, Fang;Sun, Jiayue;Cao, Di;Tuo, Yanfeng;Jiang, Shujuan;Mu, Guangqing
    • Food Science of Animal Resources
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    • v.37 no.1
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    • pp.44-51
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    • 2017
  • Heat treatment of milk aims to inhibit the growth of microbes, extend the shelf-life of products and improve the quality of the products. Heat treatment also leads to denaturation of whey protein and the formation of whey protein-casein polymer, which has negative effects on milk product. Hence the milk heat treatment conditions should be controlled in milk processing. In this study, the denaturation degree of whey protein and the combination degree of whey protein and casein when undergoing heat treatment were also determined by using the Native-PAGE and SDS-PAGE analysis. The results showed that the denaturation degree of whey protein and the combination degree of whey protein with casein extended with the increase of the heat-treated temperature and time. The effects of the heat-treated temperature and heat-treated time on the denaturation degree of whey protein and on the combination degree of whey protein and casein were well described using the quadratic regression equation. The analysis strategy used in this study reveals an intuitive and effective measure of the denaturation degree of whey protein, and the changes of milk protein under different heat treatment conditions efficiently and accurately in the dairy industry. It can be of great significance for dairy product proteins following processing treatments applied for dairy product manufacturing.

Production ani Some Properties of Milk Clotting Enzyme from Mucor sp. (Mucor sp. 에 의한 응유효소생산(凝乳酵素生産)과 그의 성질(性質)에 관하여)

  • Yeum, Dong Kil;Kim, Chan Jo;Lee, Jong Soo
    • Korean Journal of Agricultural Science
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    • v.14 no.1
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    • pp.144-155
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    • 1987
  • A potent fungus producing milk clotting enzyme with fairly weak proteolytic activity was isolated from various soil and sewage, which the selected strain, SA-101, was identified as Mucor sp. with microbiological characteristics. Its milk clotting enzyme production was maximized when grown on 10g of wheat bran media added to 8ml of tap water containing 0.1M HCl for 60hrs at $30^{\circ}C$. This enzyme production was stimulated by addition of 6% lactose, 0.05% NaCl and reached a maximal level of 9810 unit/g wheat bran. The crude enzyme product could be produced effectively by salting out with ammonium sulfate fractionation and lyophilization. The ratio of milk clotting activity to proteolytic activity of crude enzyme product was lower than Hansen rennet, but resembled to Meito rennet. The optimal temperature of milk clotting activity of crude enzyme product was abound $60^{\circ}C$ on a substrate of 10% reconstituted skim milk containing 1/100M $CaCl_2$.

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Survey on the Intake and Consumption Patterns of Milk and Dairy Products by Elementary School Students (초등학생의 우유 및 유제품 섭취 양상과 소비 성향에 관한 조사)

  • Nam, Eun-Sook;Jung, A-Young;Park, Shin-In
    • The Korean Journal of Food And Nutrition
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    • v.24 no.2
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    • pp.191-203
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    • 2011
  • We conducted a study to investigate milk and dairy products consumption among elementary school students to identify ways to increase their intake of milk and dairy products. We asked 518 students in Seoul to fill out questionnaire. Only 55.6% of the subjects consumed milk daily, and 43.7% of them drank at least 1 cup per day. The frequency and quantity of milk consumption were higher in male students than female students. The majority of the subjects consumed whole milk, and most students(59.5%) preferred flavored milk to whole milk. The reasons given for drinking milk included 'wanting to be tall'(66.1%) and 'for good health'(47.1%), while the main reason given for not drinking milk was stomach pain (68.4%). Records of having an unpleasant experience and upset stomach after drinking milk occurred at a higher rate for those who did not drink milk(84.2%) than for those who did(53.3%). Of the students questioned, 36.9% consumed dairy products other than milk 3~4 times per week, and liquid-type yoghurt(43.8%) and ice cream(35.4%) were the preferred dairy products among students. The reasons given for consuming dairy products were 'good taste'(56.6%), 'good to eat'(46.6%), 'wanting to be tall'(32.4%), and 'for good health' (25.4%). Among those students who did not consumed dairy products, the major reason given was 'family does not eat at home'(33.3%). After consuming the dairy products, 71.4% of participants thought that dairy products did not result in physical improvement. Most students had experienced purchasing milk and dairy products by themselves. When they bought milk or dairy products, the reasons given for making a particular selection were 'shelf-life'(61.6%) for milk, and 'favorite dairy products'(54.1%) for dairy products. According to participants, the factors that need to be considered for milk and dairy product consumption among elementary school students are 'higher nutrition' (60.8%), 'better sanitation'(57.3%), and 'better quality and taste'(55.2%).

Biosensor System for the Detection and Assessment of Safety in Milk and Dairy Products (우유 및 유제품의 안전성 평가를 위한 바이오센서의 이용)

  • Kim, Hyoun-Wook;Han, Sang-Ha;Ham, Jun-Sang;Seol, Kuk-Hwan;Jang, Ae-Ra;Kim, Dong-Hun;Oh, Mi-Hwa
    • Journal of Dairy Science and Biotechnology
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    • v.29 no.2
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    • pp.51-57
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    • 2011
  • Milk and dairy products are nutritionally one of the most important food in human health and the quality of raw milk is significantly important to ensure safety of dairy products. However, milk and dairy products are commonly related with chemical and microbial contaminations. Therefore, rapid and reliable detection of hazardous (e.g. pathogenic bacteria, pesticides, antibiotics, microbial toxins) in milk and dairy products is essential to ensure human health and food safety. Conventional methods for detection of food hazardous are mostly time-consuming to yield a results. Recently, biosensors have been focused as its rapidity and high sensitivity to analyse chemical and microbial hazardous from a variety of foods and environments. This study reviewed the recent trends and applications of biosensors as rapid detection method of hazardous in milk and dairy products.

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MALDI-TOF MS System for the Identification of Microorganisms in Milk and Dairy Products (우유 및 유제품 중 미생물 동정을 위한 MALDI-TOFMS활용)

  • Kim, Hyoun Wook;Ham, Jun-Sang;Seol, Kuk-Hwan;Han, Sangha;Park, Beam Young;Oh, Mi-Hwa
    • Journal of Dairy Science and Biotechnology
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    • v.30 no.2
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    • pp.131-137
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    • 2012
  • Rapid and reliable identification of microorganisms is a key for tracing the relationship between the target bacteria and related infectious diseases. Various identification methods such as classical phenotypic analysis, numerical taxonomic analysis, and DNA sequencing have been widely used to classify microorganisms in milk and dairy products. Matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectrometry (MS) identifies targeted bacteria in milk and milk products. Several studies have demonstrated that MALDI-TOF MS identification is an efficient and inexpensive method for the rapid and routine identification of isolated bacteria. MALDI-TOF MS could provide accurate identification of bacteria in milk and milk products at the serotype or strain level and enable antibiotic resistance profiling within minutes.

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Black soldier fly as feed ingredient for ruminants

  • Astuti, Dewi Apri;Wiryawan, Komang Gede
    • Animal Bioscience
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    • v.35 no.2_spc
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    • pp.356-363
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    • 2022
  • This paper is a review of some experiments using black soldier fly (BSF) and its by-product to explore their nutritional value, production potential in Indonesia and its application in the ration of ruminants. Evaluation on the effect of milk replacer, creep feed containing BSF, BSF frass and the possibility to use lactic acid bacteria from BSF as probiotics are presented. Utilization of BSF larvae in milk replacer as skim and cream milk substitute showed that there were similarity on physiological, hematological status and performance of goat kids compared to those offered goat milk or commercial milk replacer. In addition, BSF larvae can be used to substitute soybean meal in the creep feed for post weaning goat kids without any differences in weight gain and blood profiles. However, utilization of BSF frass in the fattening goat ration resulted lower digestibility of dry matter and organic matter due to the chitin content in the frass. Black soldier fly larvae grown on chicken manure harbour lactic acid bacteria (LAB) which have potential as probiotics for ruminants. In general, BSF larvae has potential as ingredient for milk replacer, creep feed, fattening ration, and source of LAB for probiotics.

Microbiological Quality Assessment of a Local Milk Product, Kwacha Golla, of Bangladesh

  • Rahman, M.M.;Rahman, M.Mashiar;Arafat, S.M.;Rahman, Atiqur;Khan, M.Z.H.;Rahman, M.S.
    • Applied Biological Chemistry
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    • v.51 no.4
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    • pp.251-257
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    • 2008
  • Different types of milk products, such as kwacha golla, mawa, cheese, curd, and chocolate are popular in Bangladesh. However, the microbiological safety of these products is poorly understood. This study was performed to assess the microbiological quality of kwacha golla, a local milk product. Kwacha golla samples were collected from ten different areas of Rajshahi and Kushtia regions, and the quality of the each sample was assessed using various parameters including standard plate count, total coliform, fecal coliform, total fungi, and spore-forming bacteria, as well as food-borne microorganisms. Out of 300 samples, total coliform was detected at 56.66% (n= 300), exceeding the minimum allowable limit of 36.66%. Similarly, experiments were carried out with fungi and food-borne pathogens including Escherichia coli, Listeria monocytogenes, Salmonella sp., and Staphylococcus aureus. Results revealed 85.33, 53, and 49.33% of the samples were contaminated by fungi, E. coli, and L. monocytogenes, respectively. However, all samples showed no contaminations of Salmonella sp. and Staphylococcus sp. Therefore, this study could be helpful to the people of Bangladesh by providing information on the possibility of a major health problem caused by the consumption of kwacha golla.

Packaging of dairy products: an overview

  • Yoo, SeungRan
    • Food preservation and processing industry
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    • v.15 no.2
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    • pp.23-31
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    • 2016
  • Dairy products, including milk, cheese, cream, yogurt, and butter, constitute excellent sources of essential nutrients such as calcium, proteins, and vitamin D; therefore, nutritionists recommend a constant daily dietary intake of dairy products. Packaging is an important feature that ensures high-quality products are delivered to consumers; different packaging materials and forms are required depending on the products. Packaging forms include pouches for butter, cheese, and milk powder; cartons for liquid, frozen, and coagulated milk; packets for pasteurized liquid milk; bottles for milkshakes and other liquid products; and cups for frozen and coagulated products. The increase in mobile lifestyles among consumers will lead to smaller households and greater preference for convenience, which will promote individual and smaller packaging for dairy products. This article reviews the development of packaging materials and forms, packaging requirements, and future considerations for the packaging of dairy products.

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Factors Influencing Purchase Intention of Vietnamese Adults: A Case Study of Dairy Products

  • NGUYEN, Lan
    • The Journal of Asian Finance, Economics and Business
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    • v.8 no.10
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    • pp.187-196
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    • 2021
  • Vietnam has become one of the largest markets in Southeast Asia, with huge demand for many kinds of consumer goods, including dairy products. Although the domestic industry of producing and distributing milk has flourished dramatically in recent years, Vietnam still heavily hinges on dairy imports. The total value of milk products in 2020 exceeded 1 billion USD, leading to Vietnam being one of the 20 biggest importers of dairy milk globally. To explore this potential industry, we applied a multivariate linear regression model to investigate the milk consumption behaviors of Vietnamese adults. 2000 participants took part in our survey in which the products evaluated were Dielac Alpha - the most famous national powdered milk introduced in 2007 by Vinamilk. This product was designed for all ages, from children aged 0-6 to pregnant women or adults. The results indicate that the decision to purchase milk could be attributed to a host of factors. While price represents the most strongly influential factor, there might be variations according to consumer characteristics, namely age, marriage status, gender, and particular shopping behavior. From these findings, we propose some managerial implications for regulatory bodies and relevant enterprises to prepare appropriate policies and strategies for their business development.