• Korean Journal of Fisheries and Aquatic Sciences
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• v.34 no.2
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• pp.160-163
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• 2001

This study was performed to investigate the effect of vitamin $B_{12}$ addition on the production and hatching rate of resting egg of freshwater rotifer, Brachionus calyciflorus. Different concentrations of vitamin $B_{12}$ was added into concentrated freshwater Chlorella before fed to rotifer and rotifer was cultured in 250 mL flask. The maximum density of rotifer was 138 inds./mL at 6 ppm and it increased with an increase of vitamin $B_{12}$ addition. Mixis rate and fertilization rate of rotifer were $63.0\%$ and $89.6\%$, respectively, at 6.0 ppm. The production of resting eggs per mL was 231 eggs/mL at 1.5 ppm, but there was no significant difference among vitamin $B_{12}$ addition levels. The highest production of resting eggs per 10,000 rotifers and Chlorella dry weight (g) were 11,289 eggs and 121,252 eggs, respectively, at the 6 ppm. The hatching rate of resting egg was not significantly different among vitamin $B_{12}$ addition levels, but significantly higher than the control (without addition of vitamin $B_{12}$ ). These results showed that vitamin $B_{12}$ addition could affect production and hatching rate of resting egg of freshwater rotifer, B. calyciflorus.

• Journal of the Korean Applied Science and Technology
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• v.36 no.4
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• pp.1119-1127
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• 2019

This study analyzes the content of niacin, B1, and B2, which are among the water-soluble vitamin B group, in cultivars of the commonly consumed agricultural products of apples, peaches, nectarines and strawberries to compare content differences and to use results as base material for the Korean Food Composition Table. While the vitamin B1 content of apples according to different cultivars was found to be within the ranges of 0.063-0.208 mg/100g, and the content of vitamin B2 was found to be within the value ranges of 0.006-0.031 mg/100g, no niacin was found. The vitamin B1 content of peaches and nectarines according to different cultivars was found to be within the value ranges of 0.014-0.276 mg/100g, the content of vitamin B2 was found to be within he value ranges of 0.019-0.042 mg/100g, and niacin content was found to be within the value ranges of 0.298-1.096 mg/100g. The vitamin B1 content of strawberries according to cultivars was found to be within the value ranges of 0.112-0.394 mg/100g, the content of vitamin B2 was found to within the value ranges of 0.001-0.027 mg/100g, and niacin content was found to be within the value ranges of 0.388-0.809 mg/100g. Therefore, when nutrient composition analysis databases for the fruits of apples, peaches, and strawberries are constructed, cultivar factors must be put into consideration. In addition, differences can be found according to fruit harvest times, cultivation methods, and environmental factors, so related additional is needed.

• Korean Journal of Community Nutrition
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• v.12 no.6
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• pp.752-760
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• 2007

Inadequate nutritional status of pregnancy can cause underweight and premature birth, undergrowth and deliverance of physically and mentally defected babyies. The purpose of this study is to provide guidelines for preventing preterm delivery in the aspect of nutritional factors. The nutrient intakes were compared between a preterm delivery group and a normal term delivery group to recognize risk factors of preterm delivery. The results obtained are summarized as follows. The pregnancy period was statistically longer in the normal term group (p<0.0001). Weight increase was statistically higher in the normal term group (p<0.0001). Calories (p<0.05), carbohydrates (p<0.0005), dietary fibers (p<0.0001), potassium (p<0.0005), vitamin $B_1$ (p<0.0005), vitamin $B_6$ (p<0.05), vitamin C (p<0.0001), and folic acid (p<0.05) intakes were statistically higher in the normal term group. Nutrient density of vitamin $B_1$ (p<0.05) and vitamin C (p<0.0001) in the normal term group was statistically higher. Nutrient adequacy ratio of zinc (p<0.05), vitamin $B_1$ (p<0.05) and folic acid (p<0.05) were statistically higher in the normal term group. Index of Nutritional Quality of vitamin $B_1$ (p<0.05) and vitamin C (p<0.0001) were statistically higher in the normal term group. In this study, the normal term delivery showed higher intakes of calories, carbohydrates, dietary fiber, crude fiber, potassium, vitamin $B_1$, vitamin $B_6$ vitamin C and folic acid than the preterm delivery group. Deficiencies in various nutrients may lead to preterm delivery, therefore, balanced nutrient intake is recommended to prevent preterm delivery.

• The Korean Journal of Community Living Science
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• v.26 no.4
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• pp.661-673
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• 2015

This study examines the effects of a low-calorie raw juice diet on the level of serum ferritin in adults and analyzes nutrient intake from the diet. There were significant differences between juices; the highest calorie was provided by pear juice, highest crude protein, vitamin A, and vitamin B2 levels were from green Juice 1; and highest vitamin C and vitamin B1 levels were from fruit juices. The ratio of estimated energy requirements (EER) for the participants was 56.2% from the raw juice diet. The percentages of recommended intake (RI) from the raw juice diet of protein (57.9%), dietary fiber (19.1%), niacin (6.2%), calcium (0.1%), and magnesium (0.2%) were lower than 75%. However, those of RI of vitamin A, vitamin B1, vitamin B2, vitamin B6, and vitamin C were 1796.5%, 7481.7%, 1915.5%, 30858.7%, and 7500%, respectively, exceeding the tolerable upper intake level (UL) for vitamin A, vitamin B6, and vitamin C. There were significant decreases in weight, the body mass index (BMI), body fat mass, and skeletal muscle mass in males and females. After the diet program, serum iron and SOD (superoxide dismutase) showed significant decreases, whereas RBC, hemoglobin, hematocrit, and serum ferritin showed significant increases. There were negative correlations between serum ferritin and weight and between serum ferritin and skeletal muscle mass for all participants. There were negative correlations between serum ferritin and skeletal muscle mass for males and between serum ferritin and body fat mass for females. These results suggest that a raw juice diet can supplement a regular diet to prevent excess or deficient nutrient intake.

• Journal of Life Science
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• v.14 no.1
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• pp.82-90
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• 2004

This study was carried out to analysis the composition of fruit body of Morchella esculenta (MEF) to determine the possibility of medical and edible use. The nutritional compositions of MEF were as follows ; The contnt (g%) of crude fat, carbohydrate, crude protein were 3.8, 43.5 and 29.7, respectively. Potassium concentration in MEF was high up to 3558.0 mg% and Ca, Mg, Fe, Na and Zn were followed. There were 23 amino acids in MEF The content of glutamic acid was high up to 1433.0 mg% and leucine, alanine, arginine valine and theronine were followed. Since MEF contains 25 free amino acids, it will be a favorable food stuff. The content of Vitamin A, Vitamin $B_1$, , Vitamin$B_2$, Vitamin $B_6$, Vitamin C, Vitamin $BD_3$, Vitamin E and Vitamin $K_1$, were 2.23 $\mug%$, 0.13 mg%, 0.07 mg%, 0.27 mg%, 0.17 mg%, 52.27 $\mug%$, 5.26 mg% and 3.23 $\mug%$, respectively. MEF will have a good anti-aging effect due to content of Vitamin C and Vitamin E.

• Food Science and Biotechnology
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• v.17 no.2
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• pp.262-266
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• 2008

This study was conducted to provide a vitamin $B_{12}$ database for the representative Korean food items and to assess the dietary intake assessment of vitamin $B_{12}$ for Koreans. The vitamin $B_{12}$ content of 106 foods had been determined by high performance liquid chromatography (HPLC) using column switching method. Rich sources of vitamin $B_{12}$ were meats, milk, and egg ($0.3-3.4\;{\mu}g/100g$). Vegetables and fruits contained vitamin $B_{12}$ below limit of detection (LOD). The major food sources for vitamin $B_{12}$ intake were milk (72.0%), meats (22.3%), egg (3.6%), and fishes & shellfishes (2.1%). Mean vitamin $B_{12}$ intake of Koreans was $3.16\;{\mu}g$/person/day. The proportion of population with intake below estimate average requirement (EAR) and above recommended intake (RI) of vitamin $B_{12}$ was 60.7 and 36.5%, respectively. The vitamin $B_{12}$ intake level of young children with 1-2 years which was 834.6% of RI while the intake level of the older adults 50 years and older was only 70.0% of RI. Also, there were regional differences between urban and rural area. The population with intake below RI was larger than that with intake above RI in Korea.

• Nutrition Research and Practice
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• v.10 no.2
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• pp.161-166
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• 2016

BACKGROUND/OBJECTIVES: Energy production and the rebuilding and repair of muscle tissue by physical activity require folate and vitamin $B_{12}$ as a cofactor. Thus, this study investigated the effects of regular moderate exercise training and durations of acute aerobic exercise on plasma folate and vitamin $B_{12}$ concentrations in moderate exercise trained rats. MATERIALS/METHODS: Fifty rats underwent non-exercise training (NT, n = 25) and regular exercise training (ET, n = 25) for 5 weeks. The ET group performed moderate exercise on a treadmill for 30 min/day, 5 days/week. At the end of week 5, each group was subdivided into 4 groups: non-exercise and 3 exercise groups. The non-exercise group (E0) was sacrificed without exercising and the 3 exercise groups were sacrificed immediately after exercising on a treadmill for 0.5 h (E0.5), 1 h (E1), and 2 h (E2). Blood samples were collected and plasma folate and vitamin $B_{12}$ were analyzed. RESULTS: After exercise training, plasma folate level was significantly lower and vitamin $B_{12}$ concentration was significantly higher in the ET group compared with the NT group (P < 0.05). No significant associations were observed between plasma folate and vitamin $B_{12}$ concentrations. In both the NT and ET groups, plasma folate and vitamin $B_{12}$ were not significantly changed by increasing duration of aerobic exercise. Plasma folate concentration of E0.5 was significantly lower in the ET group compared with that in the NT group. Significantly higher vitamin $B_{12}$ concentrations were observed in the E0 and E0.5 groups of the ET group compared to those of the NT group. CONCLUSION: Regular moderate exercise training decreased plasma folate and increased plasma vitamin $B_{12}$ levels. However, no significant changes in plasma folate and vitamin $B_{12}$ concentrations were observed by increasing duration of acute aerobic exercise.

• Journal of Gastric Cancer
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• v.6 no.1
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• pp.6-10
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• 2006

Purpose: The most common metabolic defect appearing following a gastrectomy is anemia. Two types have been identified: One is related to a deficiency in iron and the other is related to an impairment in vitamin B12 metabolism. The purpose of this study is to evaluate the incidence and treatment of vitamin B12 deficiency after a total gastrectomy. Materials and Methods: Serum vitamin B12 concentrations were measured in 128 patients who had undergone a total gastrectomy. The group with a serum concentration under 200 pg/ml was supplemented at one-month intervals with Actinamide and five-six months later, serum concentrations of the vitamin B12 were rechecked. Results: The group with vitamin B12 under 200 pg/ml was 61 (47.6%) of the 128 patients who had undergone a total gastrectomy. In this group, the cumulative incidences of vitamin B12 deficiency were 7.0, 23.4, 33.6, 39.1, 41.4, and 47.7% at 6 months, 1, 2, 3, 4, and 5 or more years, respectively. The treated group with vitamin B12 under 200 pg/ml had 36 (28.17%) of the 128 patients. The 16 of those cases with vitamin B12 levels of $100{\sim}150\;pg/ml$ were supplemented 5.21 times and the vitamine B12 was elevated to above 650 pg/ml. The other 20 cases with an average of vitamin B12 levels of $150{\sim}200pg/ml$ were supplemented an average of 4.75 times, and the vitamin B12 was elevated to above 780 pg/ml. Conclusion: It is necessary to supplement vitamin B12 even 1 year later after a total gastrectomy. The group with vitamin B12 under 200 pg/ml was supplemented $5{\sim}6$ times at one-month intervals with Actinamide $1,000\;{\mu}g$ IM injections and reached normal levels. (J Korean Gastric Cancer Assoc 2006;1:6-10)

• Journal of Life Science
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• v.14 no.5
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• pp.829-833
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• 2004

The major compositions of Lentinus edodes seasoning(LES) compose of 30.3% of Lentinus edodes fruit body, 18.1 % of anchovy (Engraulis japonicus) powder and 51.6% of sea tangle (Laminaria japonica), prawn and green tea powder and so on were investigated in order to evaluate the nutritional value. Sodium concentration in LES was high up to 5,042.99 mg/IOO g and K, Ca, P, Mg, Fe, Zn, Mn and Cu were followed. There were nineteen total amino acids in LES. The glutamic acid content was high up to 4.62 mg/100 mg and glycine, leucine, alanine, aspartic acid were followed. Among twenty free amino acids, glycine content was high up to 2.37 mg/100 mg and glutamic acid, asparanine, proline, taurin and aspartic acid were followed. The contents of vitamin C in LES was high up to 224.78 mg/100 g and pantothenic acid, vitamin B$_{6}$, niacin, vitamin E, folic acid, vitamin B$_{l}$ vitamin B$_{2}$, vitamin D$_{3}$, vitamin A, vitamin B$_{12}$ and vitamin $K_{l}$ were followed.wed.

• Food Science and Preservation
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• v.30 no.1
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• pp.98-108
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• 2023

The purpose of this study was to determine the vitamin B₁ and B₃ contents in 135 Korean domestic foods using high performance liquid chromatography (HPLC). The Standard Reference Material (SRM) 3233 and in-house control (grain, whole wheat and flour mixture) were used for quality control/assurance. As a result, vitamin B₁ was only detected in 54 of the 135 foods, ranging from 0.019 mg/100 g to 28.218 mg/100 g. Among the foods tested, the vitamin B₁ content was highest in ramen powder (28.218 mg/100 g) and lowest in boiled jjolmyeon (0.019 mg/100 g). In contrast, vitamin B₃ was detected in 108 of the 135 foods, ranging from 0.077 mg/100 g to 32.412 mg/100 g. We found that the vitamin B₃ content was highest in beef liver (32.412 mg/100 g) and lowest in boiled chicken heart (0.077 mg/100 g). The results of this study will be used as a nutritional database for the update of the Korean food composition table and will hence contribute to improving public health.