• Food Science and Biotechnology
• /
• v.16 no.5
• /
• pp.691-709
• /
• 2007

Concerns on environmental waste problems caused by non-biodegradable petrochemical-based plastic packaging materials as well as consumer's demand for high quality food products has caused an increasing interest in developing biodegradable packaging materials using annually renewable natural biopolymers such as polysaccharides and proteins. However, inherent shortcomings of natural polymer-based packaging materials such as low mechanical properties and low water resistance are causing a major limitation for their industrial use. By the way, recent advent of nanocomposite technology rekindled interests on the use of natural biopolymers in the food packaging application. Polymer nanocomposites, especially natural biopolymer-layered silicate nanocomposites, exhibit markedly improved packaging properties due to their nanometer size dispersion. These improvements include increased mechanical strength, decreased gas permeability, and increased water resistance. Additionally, biologically active ingredients can be added to impart the desired functional properties to the resulting packaging materials. Consequently, natural biopolymer-based nanocomposite packaging materials with bio-functional properties have huge potential for application in the active food packaging industry. In this review, recent advances in the preparation and characterization of natural biopolymer-based nanocomposite films, and their potential use in food packaging applications are addressed.

• Proceedings of the Korean Society of Food Hygiene and Safety Conference
• /
• 1994.06a
• /
• pp.7-15
• /
• 1994

Dietary life of Korean population was greatly improved by the increased food production, enlarged food processing and betterment of food distribution system during the last three decades. On the other hand, food pollution issues have arisen from the increased use of chemicals and advancements in analytical techniques and toxicological information. The health risk of hazardous substances in Korean diet was estimated to be in the decreasing order of heavy metals>pesticide residues>food additives>mycotoxins>radionuclides>PCBs whereas consumers do not recognize it in the same order. It is needed to evaluate the food safety more accurately based on scientific evidences and to adopt reasonable regulatory measures in Korea for the benefits of people's health and national interest.

• Journal of the Korean Society of Food Culture
• /
• v.34 no.4
• /
• pp.369-377
• /
• 2019

This study focused the recognition and preference of Korean traditional food of elementary school students, in order to make effective educational materials about Korean traditional foods for the elementary school students. According to the responses of 356 elementary school students participating in this research, they understood the concept of traditional Korean food and recognized positively, but did not have much interest. However, the more they liked Korean food, the higher their interest in Korean traditional foods and the higher utilization rates of Korean traditional foods. Most elementary school students enjoyed Korean traditional food occasionally, especially soup, jjigae, tang and jeongol. Elementary school students suggested that complicated recipes should be improved for the succession of Korean traditional foods and that the class for cooking traditional foods in schools should be expanded.

• Food Science of Animal Resources
• /
• v.30 no.1
• /
• pp.55-61
• /
• 2010

Breakfast sausages containing 1, 2, 3, and 4% sea tangle powder (Lamina japonica) were prepared. No differences were found in moisture, protein, and fat contents among the control and treatments. However, the ash content increased with increasing amounts of sea tangle powder (p<0.05). The pH levels in the treated samples were lower than the control in both the meat batters and the breakfast sausages (p<0.05). The $L^*$ and $a^*$ values of the meat batters and breakfast sausages were decreased by the addition of the sea tangle powder, and the control had the highest $b^*$ value (p<0.05). The added sea tangle powder improved cooking loss and improved emulsion stability. The T4 sample (containing 4% sea tangle powder) was shown to have the lowest cooking loss and water loss (p<0.05). The hardness, gumminess, and chewiness of the treatments increased compared to the control due to the presence of dietary fibers in the sea tangle. In the sensory evaluations, the 1% sea tangle powder treatment received a lower color score, but received significantly higher scores for flavor, tenderness, and juiciness (p<0.05). Collectively, the breakfast sausage containing 1% sea tangle powder was determined to have the highest overall acceptability. Altogether, the best results, in terms of physicochemical and sensory properties, were obtained for the breakfast sausage containing 1% sea tangle powder.

• Nutrition Research and Practice
• /
• v.14 no.3
• /
• pp.276-285
• /
• 2020

BACKGROUND/OBJECTIVES: As watching food-related programs has become very popular among the young generation in Korea, this study sought to compare the Mukbang- and Cookbang-watching status of university students with their dietary life. SUBJECTS/METHODS: The participants were 380 students who were not majoring in food and nutrition at a university in Gyeonggi, Korea. Based on self- reports, the participants were grouped according to their frequency of watching Mukbang or Cookbang: frequent-watching (FW) 21.1% and 5.3%, respectively; moderate-watching (MW) 43.9% and 27.9%, respectively; and not-watching (NW) 35.0% and 66.8% respectively. RESULTS: In the FW group, up to 88.8% and 70.0% of participants reported watching Mukbang and Cookbang, respectively, ≥ 3 days/week. Almost all participants in the FW and MW groups reported intention to keep watching these shows. The most frequent watching route was "YouTube" and the most important criterion to select a program was "food". In the case of Mukbang, but not Cookbang, the participants in the FW group scored their diet significantly worse than those in the NW group (P < 0.05). A greater proportion of participants felt that watching Cookbang improved their diets rather than worsened them (14.3% vs. 0.8%, respectively), while more participants said that watching Mukbang worsened their diets rather than improved them (8.1% vs. 2.4%, respectively). In both cases, greater differences were shown in the FW groups compared to the MW groups (P < 0.05 and P < 0.01 for Cookbang and Mukbang, respectively). Moreover, the participants answered that Mukbang-watching prompted them to eat more of less desirable food, such as through eating out and purchasing convenient and delivered foods, whereas Cookbang-watching made them want to cook more of their own food. CONCLUSIONS: Our results suggested that Korean university students who frequently watch Mukbang, but not Cookbang, may be a nutritionally vulnerable group that needs attention.

• Journal of the Korean Dietetic Association
• /
• v.1 no.1
• /
• pp.2-9
• /
• 1995

The present study was designed to observe whether nutritional education on children or mothers of the children who avoid to eat vegetables can improve the preferences for the vegetables of the subjects. The subjects were 45 children who are fourth to sixth grade of primary school in Bibong. They were assigned to one of three groups which are Control, Children Education and Mothers Education groups. Control group was not given any special education, while experimental groups were given nutritional education for 4 weeks. The effects of education was evaluated in the aspects of preference changes for vegetables, nutritional knowledge, attitude and food behavior of the subjects The results are summarized as follows. 1. Preferences to cucumber, lettuce, chinese cabbage and raddish were high in three groups while greenonion, onion, lotus roots and red pepper didn't suit for their taste. 2. Significantly increased scores for the preference to red pepper, pumpkin, Dorajee(root of chinese bell-flower), braken, mushroom was shown only in the children who had nutritional education while the children in the group of Mothers Education improved their preference only cabbage and lotus roots. 3. Nutritional knowledge of the children in Children Education group has improved significantly(p<0.05). While there was no significant difference between control and Mothers Education group. 4. When scores for food habit of mother and children were estimated, there was no significant difference among three groups. However, score of food habit in children was higher than that of mothers. 5. Food habit and nutrition knowledge of mother were not well corelated with dietary attitude and behavior of their children. These results indicate that the program of nutrition education in the present study can improve the food choice of children for vegetable and correct one-sided food habit. The program applied in this study would serve a kind of model for the dietetic teachers to guide the children who mainly dislikes vegetables.

• Journal of Dairy Science and Biotechnology
• /
• v.31 no.2
• /
• pp.109-125
• /
• 2013

Recently, functional foods and bioactive components in foods have drawn the attention and interest of food scientists, nutritionists, health professionals, and general consumers. Bioactive whey protein is a highly concentrated milk serum isolate or concentrate, which is high in protein (80~90% protein by weight), carbohydrate- and sugar-free, and nonfat or very low in fat. Bioactive whey protein enhances both healthy and deficient immune systems. In general, ultrafiltered whey protein contains various whey protein concentrate peptides, which could be used for manufacturing probiotics added to health beverages. Hence, the objective of this paper was to review the published literature on research of new functionally improved health beverages using various bioactive components extracted from milk and dairy products.

• Food Science of Animal Resources
• /
• v.31 no.3
• /
• pp.389-397
• /
• 2011

This study was conducted to examine the effect of salt concentration in soybean sauce (ganjang) on pre-rigor ground Hanwoo (Korean native cattle) muscle. Although adding soybean sauce reduced pH of pre-rigor Hanwoo muscle, it improved the water holding capacity (WHC), cooking loss, total protein solubility, myofibrillar fragmentation index (MFI), 2-thiobar-bituric acid (TBA) values, and textural properties by increasing salt concentration in the soybean sauce. In particular, adding soybean sauce inhibited lipid oxidation despite increasing salt concentration. An increased salt concentration in the soybean sauce in pre-rigor Hanwoo muscle tended to make the meat have lower lightness and higher redness and yellowness values. Although soybean sauce had a significantly lower pre-rigor salting effect than sodium chloride in terms of cooking loss and total protein solubility (p<0.05), soybean sauce improved myofibrillar fragmentation and lipid oxidation when compared with sodium chloride. Furthermore, no significant differences in textural properties were observed between adding soybean sauce and sodium chloride at the same salt concentrations. Therefore, soybean sauce can be a functional curing material for pre-rigor muscle.

• Journal of Sasang Constitutional Medicine
• /
• v.25 no.1
• /
• pp.71-79
• /
• 2013

Objectives The purpose of this case thesis paper is to report the improvement of symptoms for a 58-year-old male patient who experienced refusing food intake 1 month after onset of stroke by treating the patient with Chungpyesagan-tang. Methods We have determined the patient to have the Taeeumin type physique with Dry Heat Syndrome and provided Chungpyesagan-tang to alleviate the patient's symptoms. The level of improvement was measured based on changes of food intake amount. Results The patient was hospitalized to receive treatment for roughly 2 weeks. The symptom of refusing food intake as well as other symptoms that simultaneously appeared including insomnia, headache, dizziness, and general weakness have improved. Conclusions In this case, the symptom of refusing food intake appeared one month after experiencing stroke, and the patient refused not only meals, but the intake of all other forms of food including water and medicine. The cause of such symptoms were deemed to be emotional rather than the types of food which generally provide the causes for Oh Shik Jeung. As the patient was deemed to have the Taeeumin type physique with Dry Heat Syndrome. Chungpyesagan-tang was provided for treatment. Acupuncture and oriental cupping therapy were also provided concurrently, and the main symptom and other accompanying conditions have largely improved after 2 weeks of hospitalized treatment.

• Food Science of Animal Resources
• /
• v.39 no.1
• /
• pp.93-101
• /
• 2019

Nucleotides play important roles in numerous intracellular biochemical processes and are used in infant formulas and other dairy products. However, domestic analytical methods for assessing nucleotide content in products have not yet been established, and therefore, methods for determining nucleotide content are urgently required. A rapid and simple analytical method for determining the content of five types of nucleotides in dairy products was improved using solid phase extraction clean-up and high-performance liquid chromatography with diode array detector. The extraction solvent used in the AOAC method was not well dissolved and was changed to hydrophilic EDTA-Na. In addition, the results obtained using the isocratic elution method and a single wavelength were similar to those obtained using the AOAC method, and the time taken for analysis was shortened from 40 min to 25 min. The process of method validation revealed the following parameters: accuracy (84.69%-102.72%), precision (1.51%-6.82%), linearity (0.999), and limit of detection (cytidine 5'-monophosphate, 0.09 mg/L; uridine 5'-monophosphate, 0.11 mg/L; adenosine 5'-monophosphate, 0.12 mg/L; guanosine 5'-monophosphate, 0.11 mg/L; and inosine 5'-monophosphate, 0.14 mg/L). The method was also used to determine the nucleotide concentration in 25 samples (infant formulas, 1.99-29.39 mg/100 g; and cow milk, 0.28-0.83 mg/100 g). The newly improved method was appropriate for analyzing nucleotides in infant formulas and other dairy products faster when compared to conventional methods.