• Journal of the Korean Society of Food Science and Nutrition
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• v.12 no.2
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• pp.146-149
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• 1983

An experiment was made to investigate the effect of acid and alkali treatments obfserving the amount of nutrients especially calcium(Ca), phosphorus(P), ${\alpha}$-amino nitrogen(${\alpha}$-amino N), and total nitrogen(total-N)which were extracted from beef bone. 0~0.8% acetic acid and 0~0.5% sodium bicarbonate were used for treatment on different levels. The results are as follows; In case of acid treatment, Ca and P contents in bone stock wer observed to increase significantly according to acid concentration. Ca and P contents in bone stock highly incrased especially when the acid concentration was above 0.3%. Ca and P ratio varied from one to two when the acid concentration was below 0.01%. However contents of ${\alpha}$-amino N and total-N increased significantly when acid concentration was above 0.5%. In case of alkali treatment, contents of Ca and P did not increased significantly on all levels of sodium bicarbonate. The content of ${\alpha}$-amino N, however, increased significantly when the alkali concentration was in 0.05% but total-N did not show any variation in amount. These results suggest that acid treatment can give rise to an increase of the amount of nutrients which are extracted from beef bone but alkali treatment does not.

• Journal of Microbiology and Biotechnology
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• v.25 no.3
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• pp.358-365
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• 2015

ε-Poly-L-lysine (ε-PL) is a homopolymer of L-lysine molecules connected between the epsilon amino and alpha carboxyl groups. This polymer is currently used as a natural preservative in food. Insufficient biomass is a major problem in ε-PL fermentation. Here, to improve cell growth and ε-PL productivity, various nitrogen-rich nutrients were supplemented into flask cultures after 16 h cultivation, marking the onset of ε-PL biosynthesis. Yeast extract, soybean powder, corn powder, and beef extract significantly improved cell growth. In terms of ε-PL productivity, yeast extract at 0.5% (w/v) gave the maximum yield (2.24 g/l), 115.4% higher than the control (1.04 g/l), followed by soybean powder (1.86 g/l) at 1% (w/v) and corn powder (1.72 g/l) at 1% (w/v). However, supplementation with beef extract inhibited ε-PL production. The optimal time for supplementation for all nutrients examined was at 16 h cultivation. The kinetics of yeast-extract-supplemented cultures showed enhanced cell growth and production duration. Thus, the most commonly used two-stage pH control fed-batch fermentation method was modified by omitting the pH 5.0-controlled period, and coupling the procedure with nutrient feeding in the pH 3.9-controlled phase. Using this process, by continuously feeding 0.5 g/h of yeast extract, soybean powder, or corn powder into cultures in a 30 L fermenter, the final ε-PL titer reached 28.2 g/l, 23.7 g/l, and 21.4 g/l, respectively, 91.8%, 61.2%, and 45.6% higher than that of the control (14.7 g/l). This describes a promising option for the mass production of ε-PL.

• Journal of Nutrition and Health
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• v.10 no.4
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• pp.59-67
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• 1977

This study was carried out to know the food habits of 200 persons, 89 males and 111 females, aged 60 years and over from June 13 to July 2, 1977 in Seoul. The results are summarized as follows: 1. Changes of the food preferences The preferences about foods after 60 years of age showed in lower scores of dislikes than those before and, however, were not significantly changed. Beef was the item which 75% of the subjects liked and was the highest in desire to eat, Likes for hot, salty, and sour taste except sweet were diminished but they generally liked hot or sweet food rather than sour or salty one and also warm dish rather than cold one. A majority of them wanted to have their meals cook more soft and tender. 2. Intakes of foods The average consumptions of the basic food groups per capita per day were 475.5g of males .and 431.8g of females for cereals and grains, 119.6g and 103.6g for meats add legumes, 221.7g and 216. lg for fruits and vegetables, 52.6g and 39.4g for milk and small fishes, and 5.0g and 4.7g for fats and oils. 3. Intakes of calorie and nutrients The percentage contributions of three nutrients, carbohydrate, protein, and fats to the total amounts of calories were 75.9, 12.4, and 11.7% of mates and 75.6, 12.4, and 12.0% of females. Women had a slightly higher percentage of caloric intake to RDA than men who didn't satisfy RDA. The subjects revealed an insufficient protein intake as well as calcium. Therefore, many older people have to be convinced of the importance of milk for both nutrients. The mean ratios for iron, niacin, and thiamin intake were higher than RDA and on the contrary. those for riboflavin, vitamin A, and ascorbic acid intake were below RDA. It seems necessary, for the aged to maintain good state of health, to promote their appetite, and to take regular mealtime because difficulty of teeth, illness, irregular mealtime, and loss of appetite had influence on less intakes of calorie and nutrients.

• The Korean Journal of Food And Nutrition
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• v.27 no.6
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• pp.1175-1181
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• 2014

This study was conducted to develop for the elderly food that is safe, well-shaped, and easy to chew and swallow, using gelification. Gelatin, which has low adhesiveness, thereby lowering the possibility of being swallowed wrongly into the respiratory track, was used as a viscosity agent for the gelification. Water and gelatin amounts were adjusted to facilitate breaking the food with the tongue. Various foods for the elderly with chewing and swallowing difficulties were used for sensory assessment. Sensory panel consisted of 10 dietitians (10 women) in nursing care facilities. The sensory optimal composite recipes were determined by central composite design (CCD). The sensory measurements were significantly different in appearance (p<0.05), saltiness (p<0.05), sweetness (p<0.01), and overall quality (p<0.05). The optimum formulation of the Korean barbecue beef calculated by numerical and graphical method was 3.71 g of sugar and 19.53 g of soy sauce. Moisture content, hardness and adhesiveness of the Korean barbecue beef were 78.85%, 2.40, -1.87, respectively. The result shows that food for the elderly, which is easy to chew and swallow, using gelification will have sufficient competitiveness in terms of safety, taste, and preference. The development of food for the elderly that take into account the difficulties in chewing and swallowing among the elderly, reflects their preference, and has sufficient nutrients, is important to enable the elderly to enjoy their meals. Also, as the Korean society is getting older, it remains one of the biggest social challenges.

• Asian-Australasian Journal of Animal Sciences
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• v.23 no.10
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• pp.1308-1318
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• 2010

The purpose of this study was to evaluate the effect of replacing soybean meal with treated castor meal with (CMT) or without lime (CMNT) on the nutrient intake, performance, carcass characteristics, and yield of commercial cuts of beef cattle from a feedlot. Thirty male, castrated, crossbreed zebu cattle were used in the study, with an average initial weight of $360{\pm}30.27\;kg$. Five animals were used as a control group and were slaughtered at the beginning of the experiment; the remaining animals (n = 25) were distributed in random blocks (repetitions), with body weight as the criterion for block assignment. The animals were fed a diet containing 65% corn silage and 35% of concentrate on dry matter (DM) basis. Five diets consisted of four levels of soybean meal (SM) substituted with CMT (0, 33, 67 and 100%) on a DM basis and a diet with 100% of SM replaced with CMNT. At the end of the experiment, all animals were slaughtered, and their gastrointestinal tracts were emptied to determine their empty body weights (EBW). No significant effects were observed (p>0.05) for the substitution of soybean meal with CMT on intake of dietary nutrients, the average daily body weight gain (ADG) or EBW gain (EBWG). In spite of greater (p<0.05) ricin intake for the diet containing CMNT (3.06 mg/kg BW) compared to the CMT diet (0.10 mg/kg BW/d), there were no effects (p>0.05) on intake of dietary nutrients, ADG or EBWG. The average intake of DM and the ADG were 10,664.63 and 1,353.04 g/d, respectively. Regarding carcass characteristics, only carcass yield in relation to body weight was linearly reduced (p<0.05) upon substitution of SM by CMT. There was no effect (p>0.05) of the substitution of SM by CMT or CMNT on the yield of carcass basic cuts. CMT prices that are higher than 85% of the SM price do not economically justify the use of CMT. For CMT prices between 20 and 80% of the SM price, the optimal level was 67% substitution, while for prices below 15% of the SM price, the optimal level was 100% substitution with CMT. It can be concluded that treated castor meal with 6% lime can totally replace soybean meal in beef cattle diets.

• Journal of Animal Science and Technology
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• v.61 no.1
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• pp.18-27
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• 2019

With South Korea's limited capability of feed production because of its relatively small cultivable area, the country is pushed to depend on foreign feed imports despite the immensely fluctuating price of corn. Hence, intensive efforts to increase the total cultivable area in Korea like extending of farming to mountainous area is being practiced. Corn was planted in Goesan County, a mountainous area in the country. Grain and stover were harvested separately in three harvest periods: early-harvest (Aug 8), mid-harvest (Aug 18), and late-harvest (Aug 28). The nutrient composition such as dry matter (DM), crude protein (CP), crude fat (EE), organic matter (OM), neutral detergent fiber (NDF), acid detergent fiber (ADF), and non-fibrous carbohydrates (NFC) was determined after harvest. Effective degradability (ED) of the major nutrients (DM, NDF, ADF, and CP) were measured through in vitro fermentation of rumen fluid from Hanwoo (Korean cattle). pH, ammonia-N concentration, volatile fatty acid (VFA) concentration, and gas production were periodically measured at 0, 3, 6, 12, 24, 48, and 72 h. Corn grain showed higher nutrient content and ED than stover. It also had higher gas production but its pH, ammonia-N, and total VFA concentration were lower than corn stover. The best nutrient composition of corn grain was observed in early-harvest (high CP, EE, NDF, OM, NFC, and low ADF). Early-harvest of corn grain also had high effective degradability of dry matter (EDDM), effective degradability of neutral detergent fiber (EDNDF), effective degradability of acid detergent fiber (EDADF), and total VFA concentration. On the other hand, the best nutrient composition of stover was observed in mid-harvest (high DM, CP, NDF, and low ADF). EDDM, EDNDF, and EDADF were pronounced in early-harvest and mid-harvest of stover but the latter showed high total VFA concentration. Hence, early and mid-harvested corn stover and grain in a mountainous area preserved their nutrients, which led to the effective degradation of major nutrients and high VFA production.

• Animal Bioscience
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• v.35 no.8
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• pp.1174-1183
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• 2022

Objective: This study was conducted to evaluate the effects of the provision of a protein-rich supplement on productive performance, and metabolic profile on grazing suckling female beef calves in tropical conditions during 150 d of experimentation. Methods: Fifty-six Nellore suckling female calves, and their respective dams were distributed in a completely randomised design and made to undergo two treatments as follows: UNS (without supplementation), and SUP (supplementation with 5 g/kg body weight [BW] of a protein supplement). Throughout the experiment, animal performance and metabolic profile were evaluated. Also, ureagenesis and gluconeogenesis were assessed for gene expression. Results: SUP female calves showed a higher voluntary intake (p≤0.03) of the diet components evaluated, digestibility of organic matter (p≤0.02) and microbial nitrogen production (MICN; p≤0.02) compared to UNS female calves. In its turn, serum urea nitrogen (p≤0.01) and insulin-like growth factor-1 (p≤0.03) levels and ureagenesis (p≤0.04) increased in SUP female calves compared to UNS female calves. Blood glucose and triglyceride levels were not affected by supplementation. The average daily gain (ADG) from SUP female calves was higher (p≤0.02) compared with UNS female calves. However, supplementation did not affect the body measures of the animals. Conclusion: In summary, provision of a protein-rich supplement improves the intake and nutrients digestibility, ADG and final BW and increases metabolic indicators of the protein status in grazing suckling female beef calves in tropical conditions.

• Asian Pacific Journal of Cancer Prevention
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• v.13 no.1
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• pp.231-235
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• 2012

In order to explore the role of nutrients and bioactive related substances in colorectal cancer, we conducted a case-control in Uruguay, which is the country with the highest production of beef in the world. Six hundred and eleven (611) cases afflicted with colorectal cancer and 1,362 controls drawn from the same hospitals in the same time period were analyzed through unconditional multiple logistic regression. This base population was submitted to a principal components factor analysis and three factors were retained. They were labeled as the meat-based, plant-based, and carbohydrates patterns. They were rotated using orthogonal varimax method. The highest risk was positively associated with the meat-based pattern (OR for the highest quartile versus the lowest one 1.63, 95 % CI 1.22-2.18, P value for trend = 0.001), whereas the plant-based pattern was strongly protective (OR 0.60, 95 % CI 0.45-0.81, P value for trend <0.0001. The carbohydrates pattern was only positively associated with colon cancer risk (OR 1.46, 95 % CI 1.02-2.09). The meat-based pattern was rich in saturated fat, animal protein, cholesterol, and phosphorus, nutrients originated in red meat. Since herocyclic amines are formed in the well-done red meat through the action of amino acids and creatine, it is suggestive that this pattern could be an important etiologic agent for colorectal cancer.

• Korean Journal of Community Nutrition
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• v.4 no.3
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• pp.345-355
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• 1999

This study was intended to provide basic information for nutrition education and meal planning by evaluating the nutritional status, food habits, and food preference of elementary school children with school lunch program and without school lunch program(lunch box). The subjects of this study consisted of 266 elementary school children aged from 10 to 12(136 male, 130 female) in Ulsan the area. The survey was conducted by questionnaires and data were analyzed by SPSS program. The average body weight was $38.4{\pm}6.9kg$ for boys and $36.8{\pm}7.4kg$ for girls and the average heights was $141.3{\pm}5.6cm$ for boys and $141.2{\pm}5.7cm$ for girls. These values were lower than that of the Korean reference. 56.0% of the subjects skip breakfast 1 to 2 times a week, 58.2% of the subjects had prejudice for special food, such as bean, anchovy, and pork. The food habit scores of the subjects was divided into poor(11.7%), fair(63.5%), and good(24.8%). The average score of girl's was significantly(p<150) higher than that of the boy's. Compare to 1/3 of RDA for children, the average intake of nutrients provided lower amounts of all nutrients. Therefore Calcium and vitamin A intakes were especially lower than the others. Therefore the importance of milk and green vegetables must be emphsized to them through nutrition education. Children preferred ssalbab to jabkogbab and liked beef-based soup, and baechu kimchi. There were significant differences in food habit scores with gender, parent's education, and exercise. The results of this study indicate that nutrition education and menu planning program should be applied to elementary school children who are served by the school lunch program.

• Journal of Nutrition and Health
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• v.11 no.4
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• pp.39-48
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• 1978

The present study is concerned with nutritional status and palatability of the packed-lunch in elementary school children in Daejeon city. Rice and side dishes in the lunch box were weighed and the contained nutrients were analyzed by the Food Composition Table. The result of survey is as follows; 1) The means of nutritional values of 523 lunch boxes were calorie 562.48 Cal. percentage of the recommended dietary allowances.(79.11%), protein 19.16gr. (88.43%), animal protein 6.03gr. (83.50%), calcium 110.75mg (48.15%), iron 2.20mg. (56.15%), Vitamin A 328.16 I.U.. (49.22%), Vitamin $B_1$ 0.22mg. (59.45%), Vitamin $B_2$ 0.14mg (32.56%), Niacin 3.20mg. (68.08%), Vitamin C 9.79mg. (73.44%). All the nutrients are under the recommended dietary allowances. 2) The correlation between the boys and girls in the intake of protein, calcium, iron, Vitamin A, Vitamin $B_1$, Niacin index revealed statistical significancy at the level of P<0.01. 3) According to the intake of calorie, the ratio of carbohydrates, protein and fat is 78 : 14 : 8, which is excessive meal of carbohydrate. 4) Among the total intake of the protein consists of 30.20% for the boys and 32.90% for the girls. 5) The most favorite food for boys and girls from the packed-lunch is kimchi, egg, ham, sausage, cuttle-fish, laver and beef, and pork and pickles are most undesirable items. 6) The most favorite snack is bread, cake, ice cream, chocolate, fruits and milk. 7) Both boys and girls like Kimchi, fried and saute foods but dislike Namul (seasoned green vegetables) the most. 8. The side dishes of the packed·lunch lack in variety of cooking method.