• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2005년도 추계학술대회 및 한일 식물생명공학 심포지엄
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• pp.138-138
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• 2005

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2005년도 추계 학술발표회
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• pp.31-32
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• 2005

• Nutrition Research and Practice
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• 제17권1호
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• pp.91-102
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• 2023

BACKGROUND/OBJECTIVES: This study examines life stress, dietary attitudes, and snacking frequency for college students living in Seoul and Gyeonggi Province. The purpose of this study is to assist college students feeling stressed by offering desirable dietary attitudes and choices of the appropriate snacks by providing educational materials that offer appropriate nutrition education and nutritional information. SUBJECTS/METHODS: A survey was conducted on a total of 600 college students aged 19-29-year-olds living in Seoul and Gyeonggi Province (234 male students and 366 female students). Collected data were analyzed using SPSS WIN 28.0 program. RESULTS: Life stress among college students did not differ significantly between the genders. Male students were more stressed about lover (P < 0.01), while female students were more stressed about value problems (P < 0.01) and future problems (P < 0.05). Dietary attitude ratings were 3.1 for both male and female students with no significant difference. The overall snacking frequency was 4.1 times/day-4.2 times/day for male students and 4.0 times/day for female students-thus, there was no significant difference. Male students consumed 'beverage' (P < 0.01) more frequently than female students. Life stress and snacking were positively correlated for 'biscuit/cookie,' 'chip,' 'cereal,' 'juice/smoothie,' 'café americano,' 'café latte,' 'tea,' 'jelly,' 'chocolate,' 'rice cake,' 'milk,' 'flavored milk,' and 'ice cream' among male students. Among female students, life stress and snacking were positively correlated with 'cereal,' 'caramel,' and 'soymilk,' and negatively correlated for 'biscuit/cookie' and 'carbonated drink.' CONCLUSIONS: College students should manage their stress by identifying its causes and learning how to deal with stressful situations. Additionally, providing them with proper nutrition education based on the correct nutritional information is essential for promoting good food attitudes and snacking behaviors.

• 한국초지조사료학회지
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• 제42권2호
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• pp.120-126
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• 2022

The objective of this study was to determine effects of phosphorus on lignification and carbohydrate metabolism in Kentucky bluegrass under drought stress. Drought stress was induced by reducing of water to plants in pots. Two types of phosphorus were applied as potassium phosphate (PO₄^3-; P) or potassium phosphonate (PO₃^3-; PA) in drought-stressed plants. Drought had significant negative effects on plant growth, as revealed by reduced biomass of shoot. Drought-induced increase of lignin content was concomitant with the increase of phenylalanine ammonia-lyase (PAL). Soluble sugar content was highly increased but fructan content was largely decreased by drought stress. However, the application of phosphorus was efficient to ameliorate the adverse effects of drought. PA application improved reduced shoot growth and relative water content, and inhibited lignification synthesis with a reduction of PAL activity. P or PA application maintained soluble sugar and fructan content at similar levels to controls under drought stress. These results indicate that phosphorus application may mitigate the drought stress by inhibiting the lignification and promoting the fructan assimilation.

• 한국융합학회논문지
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• 제9권7호
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• pp.141-147
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• 2018

치위생과 학생들의 스트레스 부분을 스트레스 반응 척도를 이용하여 체계적으로 분석하여 대학생활 만족도와의 관련성을 파악하기 위하여 경남지역에 소재한 치위생과 학생 299명을 대상으로 스트레스, 스트레스 반응척도, 대학생활 만족도를 융합연구 하였다. 스트레스 반응척도에 따라 체계적으로 분석한 결과 피로와 좌절, 우울, 분노에서 높은 수치를 나타내었다. 또한 스트레스를 경험한 경우 만족도에도 부정적인 영향을 미쳤다. 스트레스는 심각한 경우 질병으로 이어질 수 있는 부정적인 영향을 줄 수 있다. 대학생활의 스트레스가 부적응과 불만족을 가중 시킬 것을 예상 할 때 스트레스 반응척도를 이용한 체계적인 분석 연구는 스트레스를 줄이고 대학생활 만족도 향상에 분명히 도움이 될 것으로 판단된다. 이에 대한 방안으로 치위생과에 맞는 스트레스 반응 도구의 개발과 분석을 제안한다.

• 근관절건강학회지
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• 제21권2호
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• pp.125-134
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• 2014

Purpose: The purpose of this study was to identify factors associated with quality of life of nursing students during clinical practice. Methods: A convenience sample of 332 nursing students completed the questionnaire from July to September, 2013. A self-reported questionnaire was used to obtain data on quality of life, stress related to clinical practice, and health promotion behavior. Data was analyzed with independent t-test, one way ANOVA and Scheff${\acute{e}}$'s post hoc test, Pearson correlation coefficients, and hierarchical multiple regression by using SPSS version 20.0. Results: There were significant differences in quality of life scores by age, economic status, interpersonal relationships, daytime somnolence, number of visits in pharmacy and/or healthcare center, health status, and stress management. Quality of life had positive correlation with health promotion behavior but had negative correlation with the level of stress related to clinical practice. Models including these variables explained 34.3% (F=9.77, p<.001) of the variance for quality of life. Age, economic status, sleep amount, numbers of pharmacy/hospital visits, health status, stress during clinical practice, and health promotion behavior were significantly associated with quality of life in nursing students. Conclusion: There is a need to develop and implement new strategies that will result in improvement in nursing students' quality of life.

• Weed & Turfgrass Science
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• 제5권4호
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• pp.181-186
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• 2016

Three Echinochloa species inhabit various crop fields with different soil moisture conditions. Therefore, a growthpouch test was conducted to investigate adaptive diversity of six Echinochloa species, three from Korea and three from USA, toosmotic stress by assessing shoot and root growths. Echinochloa crus-galli var. praticola showed the greatest tolerance to osmoticstress in both root ($GR_{50}=1316.3g\;PEG\;L^{-1}$) and shoot ($GR_{50}=212.2g\;PEG\;L^{-1}$) growths, while Korean E. oryzicola was mostsensitive to osmotic stress in both root ($GR_{50}=116g\;PEG\;L^{-1}$) and shoot ($GR_{50}=126.2g\;PEG\;L^{-1}$) growths. Root to shoot (R/S) ratioof Echinochloa crus-galli var. praticola increased with increasing osmotic stress, while that of Korean E. oryzicola decreased, suggestingthat R/S ratio is closely related to osmotic stress tolerance in Echinochloa species. Our results clearly demonstrate that E. crus-galli var.praticola maintains high R/S ratio even under high osmotic stress, which enables this species to well adapt to dry upland condition. Incontrast, while E. oryzicola fails to maintain sufficiently high R/S ratio, resulting in poor adaptability to dry upland condition.

• Journal of Microbiology and Biotechnology
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• 제21권8호
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• pp.830-837
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• 2011

A genomic DNA fragment encoding a putative maltooligosyltrehalose trehalohydrolase (NfMTH) for trehalose biosynthesis was cloned by the degenerate primer- PCR from cyanobacterium Nostoc flagelliforme. The ORF of NfMTH is 1,848 bp in length and encodes 615 amino acid residues, constituting a 70 kDa protein. The deduced amino acid sequence of NfMTH contains 4 regions highly conserved for MTHs. By expression of NfMTH in E. coli, the function of this protein was demonstrated, where the recombinant protein catalyzed the hydrolysis of maltooligosyl trehalose to trehalose. The expressions of MTH and maltooligosyltrehalose synthase in the filaments of N. flagelliforme were upregulated significantly under dehydration stress, NaCl stress, and high temperature-drought stress. The accumulations of both trehalose and sucrose in the filaments of N. flagelliforme were also improved significantly under the above stresses. Furthermore, trehalose accumulated in smaller quantities than sucrose did when under NaCl stress, but accumulated in higher quantities than sucrose did when under temperature-drought stress, indicating that both trehalose and sucrose were involved in N. flagelliforme adapted to stresses and different strategies conducted in response to various stress conditions.

• 한국초지조사료학회지
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• 제44권3호
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• pp.204-209
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• 2024

Drought is one of the environmental factors inhibiting plant productivity and growth, leading to oxidative damage. This study aims to identify the role of sodium hydrosulfide (NaHS) as a hydrogen sulfide (H₂S) donor in drought stress tolerance in Brassica napus. Drought-induced stress symptoms appeared eight days after treatment, showing wilted leaves and a significant reduction of leaf water potential. Drought-induced increase of lipid peroxidation was significantly reduced by NaHS application. NaHS-treated plants mitigated stress symptoms under drought conditions by reducing hydrogen peroxide (H₂O₂) content, confirmed with H₂O₂ localization in situ. Furthermore, NaHS promotes photosynthetic activity by maintaining chlorophyll and carotenoid content, thereby supporting plant growth under drought conditions. Pyrroline-5-carboxylate and proline contents were significantly increased by drought but further enhanced by NaHS treatment, indicating the important roles of proline accumulation in drought stress tolerance. In conclusion, this study provides valuable insight into the roles of NaHS in alleviating drought stress by reducing oxidative stress and promoting proline accumulation. Therefore, NaHS may serve as an effective strategy to enhance crop production under drought-stress conditions.

• 지역사회간호학회지
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• 제17권3호
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• pp.407-418
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• 2006

Purpose: The purpose was to examine the level of perceived stress, lifestyle, and health status indicators and identify the relationships among them in medical center employees. Method: This study utilized data from Cohen's Perceived Stress Scale, health survey developed by National Health Insurance Corporation, and laboratory tests (such as liver enzyme or lipid profile) on 873 medical center employees. The data were analyzed using the SPSS 12.0 program through descriptive statistics, $x^2-test$, independent t-test, ANOVA and ANCOVA. Results: Perceived stress was relatively high, but lifestyle and health status indicators were good. Age, gender, and job were significantly related to perceived stress, life style, and health status indicators: younger employees, men, nurses reported higher stress; older employees, men and medical technicians reported worse life style; older employees, men and doctors showed more abnormal health status indicators. There was a significant relationship between perceived stress and life style: the higher the level of stress was, the more drinking or the more smoking they had. However, there was no clear relationship between perceived stress and health status indicators. Conclusion: Although the subjects' lifestyle and health status indicators were relatively good, their perceived stress was seriously high. Therefore, programs for reducing stress are necessary for medical center employees.