• Journal of Korean Society of Forest Science
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• v.101 no.3
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• pp.443-453
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• 2012

The objectives of this study were to find out proper potting medium and nutrient levels in the soil to promote the root nodule formation in black locust (Robinia pseudoacacia L.) seedlings. Commercial potting medium, compost, organic fertilizer, molded forest fertilizer, and compound fertilizer were used at different mixing rates to bring in various levels of mineral nutrients in the soil. Seedlings were grown in pots in a greenhouse for three months. Commercial potting medium containing peatmoss, vermiculite, and geolite was not suited for early nodule formation due to lack of nutrients, even though it produced good total dry weight. Compost was the best medium to promote both high total dry weight production and nodule formation with providing the proper levels of nitrogen and phosphorus in the soil. Molded forest fertilizer was acceptable for nodule formation. Compound fertilizer and organic fertilizer was not suited for nodule formation. The potting medium should contain optimum levels of nitrogen (0.05-0.2%) and phosphorus (100-600ppm) to promote early nodule formation in black locust seedlings.

• The Korean Journal of Mycology
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• v.25 no.3 s.82
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• pp.209-218
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• 1997

This study was carried out to obtain the basic data for artificial culture of Grifola umbellata. The optimal condition for the mycelial growth was obtained at $20^{\circ}C$ and pH 4, respectively. G. umbellata showed the most favorable growth on the Hoppkins media. Carbon sources such as glucose, fluctose and manitol were favorable for stimulating a mycelial growth of G. umbellata. Valine, one of nitrogen sources also appeared to be favorable to a mycelial growth. The optimum C/N ratio was about 30:1 in case that 1% glucose as carbon source was mixed with the basal media. Lactic acid as organic acid was most favorable to the mycelial growth. Also, thiamine-Hcl as vitamin source was favorable. The mineral nutrient of $FeSO_4$ or $MgSO_4$ was most favorable to G. umbellata, and its optimal concentration was about 0.01% in $FeSO_4$ and 0.1 % in $MgSO_4$ respectively. Among 4 different cereal extract media, polished rice extract medium which was mixed with silkworm pupae was most suitable for a favorable growth of G. umbellata.

• Korean Journal of Food Science and Technology
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• v.45 no.4
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• pp.422-427
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• 2013

The physicochemical properties of raw and black doraji were examined with the goal of increasing the utilization of doraji. Raw and Black doraji contained similar amounts of crude ash, crude fat, and crude protein, but raw doraji had higher level of fiber. Arginine was the major free amino acid in both types of doraji. Free sugar and organic acid contents of doraji increased after steaming heat treatment. Potassium was a prominent mineral in both raw and black doraji, constituting 85% of total minerals. Black doraji contained almost twice as much crude saponin as did raw doraji. Black doraji showed lower values of L (lightness), a (redness), and b (yellowness). The hardness and chewiness of raw doraji were higher than those of black doraji. Black dorai showed a higher amount and extraction rate of saponin, even though nutrient value of doraji slightly decreased after steaming heat treatment. Therefore, black doraji can be a valuable ingredient in functional foods.

• Food Science and Preservation
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• v.20 no.5
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• pp.628-635
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• 2013

This study was conducted to investigate the changes in the physicochemical properties of Peucedanum japonicum Thunb. after blanching. After blanching treatment, the crude protein content decreased but did not affect the crude fat, crude ash and carbohydrate contents of P. japonicum. All the detected free sugar contents decreased after blanching, but the total free sugar content decreased by 14.8% from that of the raw P. japonicum after blanching. The total amino acid and essential amino acid contents of the blanched P. japonicum. decreased by 10.75% and 15.22% from those of the raw P. japonicum. There were no differences in the contents of the total fatty acid between the raw and blanched P. japonicum. The total organic acid content decreased by 37.03% from that of the raw P. japonicum. after the blanching, and the reduction of the acetic acid was largest in the organic acid. The vitamin A, C and E contents decreased by 20.20%, 8.23% and 35.59% after the blanching. The total mineral content of the blanched P. japonicum. decreased by 21.84% after the blanching. The nutrients in the P. japonicum were essential amino acid, vitamin C, minerals, but these were reduced after the blanching. Therefore, the blanching conditions that can reduce nutrient loss of P. japonicum must be established.

• Journal of the Korean Dietetic Association
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• v.23 no.3
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• pp.263-273
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• 2017

Numerous studies have investigated quantifying dietary intake according to the weight status of children and adolescents. However, studies on differences in quality among diets remain scarce. This study compared diet quality by weight status and examined correlations between quality of diet and obesity in children and adolescents. Two hundred fourteen children and adolescents aged between 9 and 18 years participated in this study (Normal weight n=104, Obesity n=110). The data related to food intake were investigated by dietary records, Diet Quality Index-International (DQI-I), and Nutrition Quotient (NQ) and then compared with Dietary Reference Intakes for Korean (KDRIs). In DQI-I, moderation factor (control of unhealthy foods) score was 21.7 in the normal weight group and 19.5 in the obesity group. The normal weight group showed a higher score for moderation factor than the obesity group (P<0.001). Compared with KDRIs, vitamin $B_6$, folate, vitamin C, vitamin E, calcium, potassium, and zinc intakes were insufficient in both groups. Multiple logistic regression analysis revealed that DQI-I moderation was negatively associated with obesity (OR=0.77, 95% CI 0.69-0.87) after adjustment for age, gender, income, and total energy intake. Our results suggest that children and adolescents require nutritional education to understand the importance of vitamin and mineral consumption. Especially, education for children and adolescents with obesity needs to emphasize moderation of nutrient intake that can cause diseases with hyper-ingestion such as sodium and high calorie-low nutrition foods.

• The Korean Journal of Community Living Science
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• v.16 no.1
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• pp.15-20
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• 2005

To identify and compare the nutritional composition of different kinds of citrus, three examples (Citrus fruit, Kumquat, and Hallabong) were taken from Jeju island in Korea at the same time and their nutritional compositions were measured using the Association of Official Analytical Chemists (AOAC) method. The proximate components (moisture, protein, fat, fiber, ash, and carbohydrates), mineral and vitamin contents were measured. The Nutrient composition revealed some significant differences among the Citrus. The Citrus fruit has more moisture and Fe content than those of the Kumquat. The Kumquat contained more ash, Ca, Na, Mg, Zn, Vitamin A, and B1 than the other Citrus specimens, while the Hallabong had the most protein and Fe. However, fiber, K, Vitamin B₂, C and niacin contents were not significantly different among the specimens. The results demonstrate that the three kinds of citrus used in this study have different nutritional compositions, but they can all be used as a good food for supplementation of K, vitamin A and C. We hope the nutritional analysis of Citrus specimens will be helpful in meeting the consumer's interest in these Citrus, and increase the export of our Citrus produce.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.61 no.2
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• pp.131-137
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• 2016

This study was conducted to investigate the effects of temperature and shade, which are basic environmental conditions, on growth, yield, inorganic components, and general components of Codonopsis lanceolata, in order to obtain basic data for improving yield capacity. In natural light, in the 15, 20, and $25^{\circ}C$ groups, the plant heights ranged between 218.9 cm and 223.9 cm, and there was no significant difference between groups. However, the leaf size was larger in shade, and the leaf area was significantly larger in the 15 and $30^{\circ}C$ groups. In natural light, root length and diameter were shorter and thinner when the temperature was higher, and growth was highly suppressed at $30^{\circ}C$. With regards to macroelements, the contents of Na, Mg, and P increased as temperature increased, regardless of the plant part; however, no constant tendency was observed in K and Ca according to temperature. The contents of Mg and Ca (from highest to lowest) were in the order leaf>stem>root, whereas the contents of Na, P, and K were in the order stem>leaf>root. Contents of general components varied according to temperature, and were highest at $30^{\circ}C$. While the plant height was increased under the constant $25^{\circ}C$+DIF (Difference between day and night temperature) condition, growth was suppressed in the -DIF group, in which the night temperature was higher than the day temperature, which suggests that a change in night temperature is one of the factors that affects the growth of C. lanceolata. As in the growth of the above-ground parts, fresh weight of the root was high in the constant $25^{\circ}C$ group and +DIF group. Notably, it was more than 2.5 times the fresh weights in the constant $15^{\circ}C$ group, constant $20^{\circ}C$ group, and -15 DIF group.

• Korean Journal of Soil Science and Fertilizer
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• v.36 no.5
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• pp.290-303
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• 2003

Modern agriculture has been heavily dependent on chemical fertilizers to meet the food demands of ever increasing population. Progressive depletion of major plant nutrients in soil due to intensive cultivation practices has also necessitated the use of higher dose of chemical fertilizers particularly in soils where the organic matter content is very low. Indiscriminate use of chemical fertilizers and pressure on agriculturists to enhance per area crop yields has led to fast depletion of fossil fuel resources with concomitant increase in the prices of chemical fertilizers and also led to environmental pollution. Hence, the current trend throughout the world is to explore the possibility of using alternate nutrient sources or increasing the efficiency of chemical fertilizers by supplementing them with organic fertilizers and bioinoculants comprising largely microbes like, bacteria, fungi, algae etc to enhance nitrogen and phosphates in the soil thus creating a sustainable agricultural environment. Among the different microbial inoculants or biofertilizers, Azospirillum could be a potential candidate due to its non specific host root colonization. It had the capability to fix $N_2$ in wide pH regimes and even in presence of combined nitrogen. Azospirillum inoculation can increase the crop yield to 10-25% and substitute 25% of recommended doses of nitrogenous fertilizers. Apart from nitrogen fixation, Azospirillum is also involved in the root improvement, the activity which was attributed to an increase in the rate of water and mineral uptake by roots. The ability of Azospirillum to produce phytohormones was reported to enhance the root respiration rate, metabolism and root proliferation. They have also been reported to produce polyhydroxybutyrate, that can be used as a biodegradable thermosplastic. A lot of studies have addressed improvements in enhancing its efficiency to fix nitrogen fixation and hormone production.

• Journal of Nutrition and Health
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• v.37 no.3
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• pp.193-201
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• 2004

The objective was to evaluate the factors influencing on the growth of children aged 3 - 6 years by mini dietary assessment and anthropometric indices in 556 children and by analyzing mineral contents of hair from 273 children by inductively coupled plasma mass spectrometry (ICP-MS). The mean concentration of zinc (Zn) in hair was 68.9 $\pm$ 31.1 ppm and the zinc level of 91 ％ children was less than 60％ of the reference value of 180 ppm. The mean content of lead (Pb) in hair was 1.76 $\pm$ 1.20 ppm, but only 67％ of 273 children was within the reference value of 2 ppm and the lead level of 33％ of children was 2 - 4 times higher than the reference value. The level of Zn was negatively correlated with Pb content (r = -0.305, p 〈 0.01). Hair Zn content, regardless of age, was significantly positively correlated with height (r = 0.214) and body weight (r = 0.159). The height of 95.3％ children was belonged to the normal range of 90 - 109.9％ of standard value and the body weight of 49.8％ children was in the range of 90 - 109.9％ of standard value. However, 8.1 ％ children was overweighted (110 - 119.9％ of standard) and 9.4％ children was obese (120 - 149.9％ of standard) and 0.9％ children was severe obese (〉 150％) which resulted in total 10.3％ obese. Contrary to our expectation, 32.8％ children was underweight (70 - 89.9％ of standard) and 36％ of the underweight children showed the low content of zinc (10 - 49 ppm) in hair. There was no significant correlation between dietary intake of Zn and hair Zn content. Hair Zn content was low even though children consumed greater than 75％ of their requirement for zinc. Regardless of dietary intake of Zn, hair Zn level was rather negatively correlated to the content of Pb in hair. 38.8％ children had an unbalanced diet which resulted in lower intake of calorie, Ca, Zn, vitamin B$_2$ compared with those consuming variety of foods. Therefore, it would be needed that new approach for nutrition education to improve eating habit having the unbalanced diet in preschool children. It might be also suggested to develop new food products to complement the nutrients of Zn, Ca, Fe as snacks or dietary supplement for Korean preschool children.

• Journal of agriculture & life science
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• v.45 no.2
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• pp.103-114
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• 2011

Physicochemical characteristics of garlic collected from the different growing regions were analyzed to provide basic data for preparing nutritional composition of garlic. Moisture of garlics on cultivars from growing on China was $71.53{\pm}0.34%$ that significantly higher than domestic garlics ($59.37{\pm}0.63$-$66.92{\pm}0.72%$). Total phenol contents were $12.69{\pm}0.18$-$22.02{\pm}0.27mg/100g$, total flavonoids contents were $12.69{\pm}0.18$-$22.02{\pm}0.27mg/100g$. Total thiosulfinate and pyruvate contents were $96.28{\pm}2.55$-$150.81{\pm}0.09mg/100g$ and $132.87{\pm}0.45$-$161.37{\pm}1.58mg/100g$. Sucrose, glucose and fructose were detected from garlics, sucrose content average errors about 2-4 times due to cultivated area. Namhae garlic has the highest fructose contents than other province cultivated. 8 kinds of organic acids 11 kinds of mineral and 17 kinds of composition amino acids were detected in garlics. 5 kinds of free amino acids such as proline, alanine, tyrosine, phenylalanine and arginine were detected in all garlic samples.