• Korean Journal of Environmental Biology
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• v.31 no.4
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• pp.362-369
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• 2013

Phytoplankton and zooplankton communities were investigated from 8 weir sites of the Nakdong River system to provide basic information on plankton community after weir construction and to estimate its effects on major water quality parameters. The relationship between plankton community structure and environmental factors was analysed with CCA (Canonical Correspondence Analysis). The results suggested that discharge and total phosphorus and nitrogen concentrations are important factors determining the phytoplankton species composition. For zooplankton community, the difference in discharge between September and October induced different distribution pattern of zooplankton community with more homogeneous distribution with extreme dominance of rotifers during the high discharge season. Chlorophyll a concentration representing phytoplankton biomass has been suggested as the main environmental factor affecting zooplankton community followed by COD and total nitrogen concentration.

• The Korean Journal of Mycology
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• v.26 no.3 s.86
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• pp.365-372
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• 1998

In this study, we evaluated the genetic relationships of fourty seven Pestalotiopsis theae isolates collected from diseased sweet persimon in various places in southern part of Korea using RAPD (Randomly Amplified Polymorphic DNAs) method. As a result of the amplification, eight primers showed total of 86 bands ranging from 0.3 Kb to 3.2 Kb. Among those 86 bands, 84 polymorphic bands were used for bionominal matrix code (0, 1), and UPGMA dendrogram analysis. Similarities among the compared isolates ranged from below 60% to more than 95%. Most of the compared isolates showed $50{\sim}80%$ similarities. The number of isolate pairs which showed more than 80% similarity were 248. The number of isolate pairs which showed $50{\sim}80%$ similarity were 789, and the number of isolate pairs which showed below 50% similarity were 21. Isolate SP-21 (No.9) showed below 50% similarity with all the isolates compared. At 50% similarity level, all the isolates compared, except isolate SP-21 (No.9), were included in one big group. At 65% similarity level, all the isolates compared, except isolate SP-21 (No.9), were divided into three different groups. At 75% similarity level, all the isolates compared, except isolates SP-47 (No. 23) and SP-21 (No.9), were divided into six different groups.

• Journal of Life Science
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• v.17 no.12
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• pp.1610-1615
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• 2007

Genus Sorbus is a long lived woody species that is primarily distributed throughout Asia and Europe. This species is regarded as very important herbal medicines in Korea and China. Sorbus commixta is primarily distributed throughout Europe. We evaluated a representative sample of the four taxa with nuclear ribosomal DNA internal transcribed spacer sequences (ITS) to estimate genetic relationships within genus. Aligned nucleotide sequences of the length of ITS1 were nearly constant within genus Sorbus varying from 219 in S. aucuparia to 218 in the rest species. Especially, the 5.8S subunit of all taxa of Sorbus was found to constant of 165 bp nucleotides. However, aligned nucleotide sequences of the length of ITS2 vary from 240 in S. sambucifolia var. pseudogrcilisto 245 in S. aucuparia. Total alignment length is 629 positions, of which 35 are parsimony-informative, 32 variable but parsimony-uninformative, and 552 constant characters. The base furtherance showed the difference to the by a total taxon: an average A and T are 17.7% and G and C are 30.4%, 34.2%, respectively. All the four taxa beginning with conserved base paired triplets emerging from single strand regions (domain I). Noteworthy, in the RNA secondary structure proposed for the three Korean Sorbus taxa RNA transcript ITS2, which shows a remarkedly well-conserved folding (domain II). When compared to the European Sorbus (S. aucuparia) of ITS2. ITS analysis may be useful in germ-plasm classification several taxa of genus Sorbus.

• Korean Journal of Ecology and Environment
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• v.41 no.1
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• pp.98-103
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• 2008

Genetic diversity and population genetic structure within or among three stream populations (Gab, Baekgok and Ji streams) of Korean endangered natural monument fish, Iksookimia choii, were assessed by amplified fragment length polymorphism (AFLP). AFLP analysis using three primer combinations generated 104 to 106 AFLP bands, and percent polymorphic bands were similar in those three populations ranging 21.5 to 24.5%. Heterozygosity and genetic diversity within or among populations were quite low for all of these populations with average values ranging from 0.067 to 0.084 and from 0.076 to 0.087, respectively. Analyses of pairwise distance and genetic similarity among three populations of I. choii also revealed the similar results with very low genetic differentiation one another. Although pairwise Fst values were very low, our data clearly indicated distinct genetic differentiation among the three populations. This is the first report concerning the genetic diversity and differentiation of this species, and provides basic genetic information that should facilitate attempts to conserve this species.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.9
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• pp.570-577
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• 2016

The purpose of this study is to investigate the food hygiene and safety awareness of academic and specialized high school students, in order to provide basic materials characterization and demonstrate the need for differentiated food hygiene safety education by type of school in the Chungnam area. This study shows that the academic high school students attach more importance to Food Hygiene and Safety than the specialized high school students, but that the latter think it is easier get information about food safety and are more confident in choosing safe food than the former. Regardless of the type of school, 50.5% and 49.3% of the students believed that the safety of the agricultural and livestock products and processed food distributed for sale in the country is acceptable, respectively. 40.7% and 17.2% of the students answered that school food hygiene safety education is required and strongly required, respectively. Compared to the specialized high school students (average 3.17), the academic high school students (average 2.81) responded that they did not receive sufficient food safety education. Those students who were confident in choosing safe food showed a positive correlation with those who were confident in the hygienic handling of food (r = .662) and with those who have sufficient education on food safety (r = .504). We suggest that different food hygiene safety education is needed by academic and specialized high school students until they have sufficient confidence in the hygienic choosing and handling of food.

• Journal of the Korean Society of Food Science and Nutrition
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• v.44 no.1
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• pp.152-159
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• 2015

The purpose of this study was to analyze how consumers make links between convenience meat products and self-relevant consequences and value. Surveys on convenience meat product consumption patterns and hard laddering based on means-end chain theory were conducted from April 21 to April 25, 2014 and targeted 200 consumers in the US. The most preferred cooking method of convenience meat product was roast (25.9%) and the most common information medium was suggestions by friends and parents (37.1%). The main as well as desired places of purchasing were both the supermarket (33.6% and 27.3%, respectively). The most preferred promotion method was free sample events (38.5%). From analyzing means-end chains of convenience meat products, the most dominant value chain was 'taste (A)'-'good taste (C)'-'feel good (V)'. These results show that consumption of convenience meat products will increase when consumer expectations of taste and satisfaction are met. Further, results of the value measurement provide information on consumer satisfaction and needs and can be applied to set marketing strategies for Korean style convenience meat products.

• Journal of Convergence for Information Technology
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• v.8 no.3
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• pp.25-32
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• 2018

This descriptive research is to find communication ability, general and social self-efficacy, and academic achievement in peer collaboration subject of nursing freshmen. The data were analyzed by SPSS/WIN 19.0. The communication ability was higher in the extroverts and high discussion preference ones(p=.01), females' social self-efficacy were higher than males'(p=.03), the general and social self-efficacy of the 'introverted' and 'middle' groups were higher than the extroverts'(p=.01). The social self-efficacy on the 'middle high', 'middle' and 'middle low' of self-evaluated school grades groups were higher than 'high' one's, even the academic achievement of 'high' group was the most(p=.01). There were negative correlations between communication ability and self-efficacy, and between social self-efficacy and academic achievement. And social self-efficacy affected on the academic achievement in peer collaboration subject($R^2=0.058$, p<.05). These results can be used as a basis for developing guidelines of nursing freshmen who have to complete a lot of theoretical and practical courses in university.

• Journal of Family Resource Management and Policy Review
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• v.25 no.1
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• pp.113-132
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• 2021

Despite the diverse system development and improvement initiatives that have been created to improve the environments of child birth and nurturing, the birth rate in Korean society remains low. Some minor teenage single parents give birth and raise children. Teenage single parents are supported by the Single-Parent Family Support Act, but some of their needs are still not being addressed. As each single parent has different backgrounds and socioeconomic characteristics, an investigation is required for developing differentiated support in which they will be considered both parents and children. Therefore, this study identifies the unique problems encountered by teenage parents, focuses on single mothers giving birth, and explores measures that teenage parents can use to be independent members of civil society. Three suggestions are presented for the period from pregnancy and childbearing to parenting. First, there should be an education support plan that will enable them to finish tertiary education, and parent education. Second, measures should be created to initiate a change in direction in indifferent biological(real) fathers: these should enlighten and help them participate in rearing their children. Third, in addition to improvements of the current systems only targeting single parent-family support, which will help differentiate teenage parent support from adolescent single parent-family support, assistance should be given for teenage single parents to grow as a Subject of Rights through tailored independent support programs.

• Journal of Nutrition and Health
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• v.51 no.6
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• pp.515-525
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• 2018

Purpose: This study was performed to evaluate the cereal intake status and explore its relationship with the nutritional status of the Korean adults from 2013 ~ 2016, Korean National Health and Nutrition Examination Survey (KNHANES). Methods: We analyzed dData from the combined 2013 ~ 2016 Korean National Health and Nutrition Examination Survey were analyzed. The analysis included 12,199 adults aged from 19 to 64 years (male, n = 5,127, female, n = 7,072). In this study, according to cereal intake frequency (From food frequency questionnaire), we classified tThe subjects were classified according into the "non-cereal intake (NCI)" group (male, n = 4,290, female, n = 5,578), and "cereal intake (CI)" group (male, n = 837, female, n = 1,494) according to cereal intake frequency (From food frequency questionnaire). Results: Typically, 79.6% of adults did not consume cereals (male 81.6%, female 77.3%);, 13.4% consumed cereals 1-3 times a month (male 12.2%, female 14.8%) and 7.1% consumed cereals more than once a week (male 6.2%, female 7.9%). In the case of both males and females, the nutrient density (nutrient intake per 1,000 kcal) and Index of Nutritional Quality (INQ) of protein, calcium, phosphorous, potassium, vitamin A, vitamin $B_1$, vitamin $B_2$, niacin, and vitamin C in the Non-Cereal group were significantly lower than those of the CI group (respectively, p < 0.01). Conclusion: Our These results reveal highlight the low frequency of cereal intake in Korean adults and the better nutritional status in adults who consume cereals. It is hypothesized that tThe data of the present study would is expected to serve as basic data to improve the nutritional status of Korean adults.

• Journal of Convergence for Information Technology
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• v.9 no.7
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• pp.85-93
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• 2019

The purpose of this study is to identify the influence of demographic characteristics such as inappropriate lifestyle, stress, and health status among health risk factors of early adolescents according to gender. There is a gender difference in the perception of mental and physical health of early adolescents, and the result can be different in behavior patterns between men and women. This study was conducted to identify the health risk factors as independent variables for early adolescents in Daegu and Gyeongbuk area, and to analyze the determinants of gender (male, female) differences by parents, family environment, friends, academic background, appearance, grade, location, school grades, family situation, and health status as demographic factors. And, the Odds Ratio of the early adolescents was analyzed through logit analysis and the differences according to the influence relationship of each of them were examined. As a result of the analysis, the more the sleep and physical activity, parents, home environment, friends, academic background, and appearance are increased, the more the influence is likely to become on the male students. On the contrary, the rest of the health risk factors can increase, and the threat to the health risk factors is likely to become severe to the female students.Among them, it is necessary to develop a pre-preventive program for early adolescents' health risk factors, provide basic data for practical application in the field, and seek a detailed program according to the gender of early adolescents.