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HPLC를 이용한 지역 농산물의 비타민 B<sub>6</sub> 함량 분석
최소라 ( So-ra Choi ),송은주 ( Eun-ju Song ),송영은 ( Young-eun Song ),최민경 ( Min-kyung Choi ),한현아 ( Hyun-ah Han ),이인석 ( In-sok Lee ),신소희 ( So-hee Shin ),이기권 ( Ki-kwon Lee ),최용민 ( Young-min Choi ),김행란 ( Haeng-r 한국식품영양학회 2017 韓國食品營養學會誌 Vol.30 No.4
Contents of water soluble vitamin B6 in a total of 62 agricultural products cultivated in local areas in Korea were analyzed by high performance liquid chromatography with fluorescence detector (HPLC/FLD). To verify the method of vitamin B6 analysis, a quality control chart was formulated with in-house control using a mixture of broccoli and shiitake mushrooms. Among cereals, high content of vitamin B6 measured 234.3~260.3 μg/100 g in dried mung bean and soybean. Vitamin B6 content of non-glutinous and glutinous black rice measured 105.0 μg/100 g and 129.7 μg/100 g, respectively. In vegetables, high content of vitamin B6 were measured in passion fruit (104.3 μg/100 g), gat (55.7~84.3 μg/100 g), gomchwi (31.3~88.0 μg/100 g) and garlic (72.7~98.3 μg/100 g). Among fruits, gold kiwi 'Zespri' and green kiwi 'Hayward' revealed high vitamin B6 content of 116.3 μg/100 g and 78.7 μg/100 g, respectively. In persimmons, daebongsi had high vitamin B6 content (36.0~72.7 μg/100 g) than bansi and sweet persimmon. Vitamin B<sub>6</sub> content in dried jujube and persimmon increased more than 86.7 μg/100 g compared to fresh materials. Among specialty crops, green tea powder (64.7~251.0 μg/100 g) and sansuyu (172.3 μg/100 g) revealed high content. Of mushrooms, vitamin B6 content of Sparassis crispa (139.3 μg/100 g) was the highest. Vitamin B6 content information of agricultural products in local areas in Korea collected from this experiment will be used as valuable preliminary data for grasp national nutritional status.
노석,이인영 群山大學校基礎科學硏究所 1999 基礎科學硏究 Vol.14 No.-
The Stirling's formula provides a simple approximate expression of n! for all large n which states explicitly that ??. This formula crops up in many unexpected places in mathematics. The main purpose of this paper is to give two different proof of Stirling's formula. For the proof of this formula we introduce the Gamma function which is closely related to factorials. For the first proof we give a different expression of the Gamma function. As a consequence of this expression we obtain the Wallis' formula which gives an approximation for (2n)!. Applying the Wallis' formula and a Taylor expansion for a logarithmic function we give the first proof of the Stirling's formula. In fact we obtain an upper bound and lower bound for n!. Secondly without using the Wallis' formula we prove the Stirling's formula by a modification of the Gamma function. Also we obtain the generalized Wallis' formula from the Stirling's formula.
김귀분,이경호,최양자,전은희,홍영혜,이은자,김인숙,김미영,강경숙,석소현 노인간호학회 2001 노인간호학회지 Vol.3 No.2
The purpose of this research is to confirm, describe and interpret the implication of the reminiscence of Korean elderly people: to provide a theoretical model of Korean elderly people's reminiscence', to propose a solution on nursing mediation for Korean elderly people's reminiscence. The method used for this research is based upon in-depth personal interviews and observations. The target group consists of 6 Korean elderly women and 2 Korean elderly men. Data were collected from March, 2001 through August, 2001. The average number of interviews for each participant is 5 times and each interview was performed for about one and a half hours. Spradley's analysis has been employed for the final data collection. The first domain, the conflict between the ideal and the real includes the category of the aged people's daily lives devoid of joy. This includes the properties of economic hardship, unhappy life, regret, unfairness, falsehood, life demanding sacrifice, life demanding patience, hard life and regrets. The second domain, an ideal home, includes the taxonomies of Expectation on Spouse and Anticipation on Children. The expectation on spouse includes the property of a sick husband, an unfaithful husband, an incompetent husband and the importance of a husband, thanks for a wife, longing for a wife, whereas the anticipation of children includes children who do not meet parents expectations, death of children, experience of joy as children grow. The third domain is Expectation on Marriage. Its taxonomy falls on the conflict with husband's family, which may be attributed to difficulties in adaptation to the new family. The fourth domain is Life which may not be regained. Its taxonomies can be described as Regret on Oneself and Realization on Limitation of Oneself. The former taxonomy is attributed to sense of independence, unfortunate life, desire to be oneself, incompetence, a bitter feeling about little opportunity of education and happy memories before marriage. The latter taxonomy is attributed to praying heart, forgiveness and realization. It is required to provide nursing mediation by developing appropriate leisure programs for the elderly, to develop programs which may help improve conjugal affection, to investigate the relationship between aged people and their children and to develop nursing mediation which helps to improve the relationship, to modify a patriarchal family system and help them to restore their identities through better education and legal system, to develop a variety of social education programs run by public institutions for them.
Lee, In-Sok,Kang, Chan-Ho,Lee, Ki-Kwon The Korean Society of Crop Science 2017 한국작물학회지 Vol.62 No.4
The main objective of this study was to increase the germination percentage of kenaf seeds with less number of times under non-saline and saline conditions. Therefore, the first goal was to assess the response of kenaf seeds to NaCl. The second goal was to evaluate the effects of $KNO_3$ on kenaf seed germination. The germination percentage exhibited a decreasing tendency in germination rate. Plant dry weight was approximately 0.2 g in all treatments at 5 days after germination. As time passed, the electrical conductivity (EC) value of hydro-priming (HP) consistently increased by 8.7 mS/cm at 24 hours of immersion. However, seeds primed with $KNO_3$ showed no difference in EC values even as times passed. Regarding the priming effect, priming in 100 mM $KNO_3$ concentration for 12 hours increased germination up to 85% in $H_20$ solution and in 0 mM $KNO_3$ concentration upto 73.8% under 0.3% NaCl solution, compared to that of Control. Germination synchronization, shoot length, and leaf unfolding of primed seeds were greater than those of the Control. In addition, main root and hair roots appeared more rapidly in the treated seeds and were more abundant compared to that of the Control. The T50 (times to reach 50% of the final germination percentage) of the Control in both $H_20$ and 0.3% NaCl solutions was 18 and 22 hours, respectively. However, when treated $KNO_3$ priming (0 to 100 mM) in $H_20$ and 0.3% NaCl solution, 9 hours was sufficient to reach T50. Primed (hydro-priming and $KNO_3$) seeds had a lower MDG (mean days untill germination; 0.6-0.62) compared to that of the Control (1.13-1.31) in $H_20$ and 0.3% NaCl solutions. Regarding dry weight of plants after priming, an increasing tendency after the priming treatment in the H20 solution was observed. Furthermore, no significant difference in plant dry weight under 0.3% NaCl stress was observed between the Control and primed seeds. Taken together, the results suggest that 50-100 mM $KNO_3$ priming for 24 hours optimize seed germination rate in less number of times of exposure with great vigor. Therefore, it is recommended for kenaf seed invigoration before planting.
Effect of KNO3 Priming on Various Properties of Kenaf Seed under Non-Saline and Saline Conditions
In-Sok Lee,Chan-Ho Kang,Ki-Kwon Lee 한국작물학회 2017 Korean journal of crop science Vol.62 No.4
The main objective of this study was to increase the germination percentage of kenaf seeds with less number of times under non-saline and saline conditions. Therefore, the first goal was to assess the response of kenaf seeds to NaCl. The second goal was to evaluate the effects of KNO3 on kenaf seed germination. The germination percentage exhibited a decreasing tendency in germination rate. Plant dry weight was approximately 0.2 g in all treatments at 5 days after germination. As time passed, the electrical conductivity (EC) value of hydro-priming (HP) consistently increased by 8.7 mS/cm at 24 hours of immersion. However, seeds primed with KNO3 showed no difference in EC values even as times passed. Regarding the priming effect, priming in 100 mM KNO3 concentration for 12 hours increased germination up to 85% in H20 solution and in 0 mM KNO3 concentration upto 73.8% under 0.3% NaCl solution, compared to that of Control. Germination synchronization, shoot length, and leaf unfolding of primed seeds were greater than those of the Control. In addition, main root and hair roots appeared more rapidly in the treated seeds and were more abundant compared to that of the Control. The T50 (times to reach 50% of the final germination percentage) of the Control in both H20 and 0.3% NaCl solutions was 18 and 22 hours, respectively. However, when treated KNO3 priming (0 to 100 mM) in H20 and 0.3% NaCl solution, 9 hours was sufficient to reach T50. Primed (hydro-priming and KNO3) seeds had a lower MDG (mean days untill germination; 0.6-0.62) compared to that of the Control (1.13-1.31) in H20 and 0.3% NaCl solutions. Regarding dry weight of plants after priming, an increasing tendency after the priming treatment in the H20 solution was observed. Furthermore, no significant difference in plant dry weight under 0.3% NaCl stress was observed between the Control and primed seeds. Taken together, the results suggest that 50-100 mM KNO3 priming for 24 hours optimize seed germination rate in less number of times of exposure with great vigor. Therefore, it is recommended for kenaf seed invigoration before planting.
In-Sok Lee,Chan-Ho Kang,Ju Kim,,Dae-Ho Cho 한국국제농업개발학회 2022 韓國國際農業開發學會誌 Vol.34 No.1
This study was performed to select the optimum combinations of a cropping system by using kenaf and four forage crops on the reclaimed land, Saemangum, in Korea. First, kenaf was cultivated for 168 days from May to mid October, and then, four forage crops, such as barley, Italian ryegrass (IRG), rye, and triticale, were cultivated from late October to May next year. The agronomic performances and physiochemical analyses of kenaf and four forage crops were investigated. The kenaf yield on the reclaimed land was 2.4 t/10a compared to the upland field’s yield of 3.25 t/10a. The germination percentage of IRG was the highest in the solution of 0.3% NaCl in comparison with the other forage crops. The agronomic performances of forage crops were estimated twice during the vegetative period. A significant difference in dry weight was observed in barley at 30 days of sowing. On second investigation at 160 days of sowing, the highest plant height was found in rye and the dry weight of IRG was the lowest. At harvest time, rye showed a significant difference in the plant height of 159.8 cm and fresh weight was the highest in IRG. At this time, there was a big difference in the dry weight of rye and IRG compared to barley and triticale. With respect to the K+/Na+ ratio, rye showed the highest increase in the K+/Na+ ratio over the other crops when cultivated on the reclaimed land. With respect to the effect of the kenaf extract on the four winter crops, the extract from kenaf reduced the germination of IRG by 81.7%. With respect to the silage quality estimation, there was no increase in barley in terms of total digestible nutrient (TDN). Taken together, IRG would be useful for the silage and rye would be useful for green manure on the reclaimed land after cultivating kenaf.