• Fisheries and Aquatic Sciences
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• 제13권3호
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• pp.216-223
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• 2010

Abalone (Haliotis discus hannai), mostly distributed and maricultured in southwestern coastal areas of South Korea, is recognized as an economically important species in the fishery industry. Abalone intestines are one of the by-products of abalone processing. To investigate abalone intestines as bioactive substances, abalone intestine gastrointestinal digests (AIGIDs) of various molecular weights (MWs) were prepared using in vitro gastrointestinal digestion and an ultrafiltration system, and tested for inhibitory effects against reactive oxygen species (ROS) and oxidative stress in macrophage cells treated with hydrogen peroxide ($H_2O_2$). In our results, among AIGIDs, AIGID-III (MW=5-10 kDa) showed potent inhibitory activities for lipid peroxidation and free radicals. Additionally, the results clearly indicated that AIGID-III treatment could prevent cytotoxic damage of macrophages by $H_2O_2$-induced oxidative stress due to its potent scavenging ability against cellular ROS. These results suggest that AIGIDs may have protective and therapeutic potential for oxidative stress syndromes and immune diseases through ROS inhibition in macrophage cells.

• Animal cells and systems
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• 제7권4호
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• pp.345-348
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• 2003

The effects of acute acid stress on hatching success and hatching period of laboratory-reared hermaphroditic fish Rivulus marmoratus were examined. The effects of acute acid toxicity on mortality was also determined in three life stages of this fish. There was a significant negative effect of acid stress on hatching performance in the R. marmoratus embryos. The hatching success was only 5% at pH 3.5 compared to over 78% at pH higher than 4.0. The hatching period was also delayed by low pH treatments. The larval and juvenile stages were more sensitive to acid toxicity on mortality than the adult stage, but larvae and juveniles showed similar sensitivity. The 96-h LC50 value was pH 3.8 in larval and juvenile stages and pH 3.3 in adult stage.

• 한국보건간호학회지
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• 제29권2호
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• pp.312-324
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• 2015

Purpose: This study addressed the relationship among nutritional risk, stress, and health related quality of life for older women with a foreign daughter-in-law. Methods: A descriptive research design was used for this study. The subjects of this study were 112 older women with a foreign daughter-in-law all of whom were over 65 years and living in D city. Personal interview was used for data collection. Nutritional risk, stress, and health related quality of life were measured using Nutrition Screening Initiative (NSI), Family Inventor of Life Events and Changes (FILE), and Medical Outcome Study (MOS) Short-form 36-Item Health Survey (SF-36), respectively. Results: Older women with a foreign daughter-in-law showed negative correlation between quality of life related health and nutritional risk, stress and age, and positive correlation between Activities of Daily Living (ADL); 46% of variance in health related quality of life of older women with a foreign daughter-in-law was explained by nutritional risk, ADL, stress and occupation. Conclusion: Based on the results of this study, we suggested that specialized programs should be established to help in development of social relationship networks for older women who have a foreign daughter-in-law.

• Journal of Ginseng Research
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• 제45권2호
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• pp.218-227
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• 2021

Background: Panax ginseng is one of the most important medicinal plants and is usually harvested after 5 to 6 years of cultivation in Korea. Heavy metal (HM) exposure is a type of abiotic stress that can induce oxidative stress and decrease the quality of the ginseng crop. Siderophore-producing rhizobacteria (SPR) may be capable of bioremediating HM contamination. Methods: Several isolates from ginseng rhizosphere were evaluated by in vitro screening of their plant growth-promoting traits and HM resistance. Subsequently, in planta (pot tests) and in vitro (medium tests) were designed to investigate the SPR ability to reduce oxidative stress and enhance HM resistance in P. ginseng inoculated with the SPR candidate. Results: In vitro tests revealed that the siderophore-producing Mesorhizobium panacihumi DCY119^T had higher HM resistance than the other tested isolates and was selected as the SPR candidate. In the planta experiments, 2-year-old ginseng seedlings exposed to 25 mL (500 mM) Fe solution had lower biomass and higher reactive oxygen species level than control seedlings. In contrast, seedlings treated with 10⁸ CFU/mL DCY119^T for 10 minutes had higher biomass and higher levels of antioxidant genes and nonenzymatic antioxidant chemicals than untreated seedlings. When Fe concentration in the medium was increased, DCY119^T can produce siderophores and scavenge reactive oxygen species to reduce Fe toxicity in addition to providing indole-3-acetic acid to promote seedling growth, thereby conferring inoculated ginseng with HM resistance. Conclusions: It was confirmed that SPR DCY119^T can potentially be used for bioremediation of HM contamination.

• 지역사회간호학회지
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• 제26권2호
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• pp.108-118
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• 2015

Purpose: The purpose of this study was to investigate life stress, social support, and antepartum depression among Southeast Asian immigrant women married to Korean men. Methods: Ninety-three subjects were recruited from local women's clinics and multicultural family support centers in D City. The instruments used were the life stress scale, social support scale, and K-EPDS. All the instruments were translated into their corresponding mother languages (Vietnamese, Cambodian, and Philippine) and notarized. Results: The item mean scores of life stress and social support were 2.65 and 3.17, respectively, on a 5-point Likert scale. The mean score of antepartum depression was 10.16, indicating that they were generally in a depressive state. A positive correlation was observed between life stress and antepartum depression (r=.59, p<.001). Social support was negatively correlated with life stress (r=-.42, p<.001) and antepartum depression (r=-.39, p<.001). The best predictors for antepartum depression were life stress, marital satisfaction, and emotional support, and they explained 43% of the variance. Conclusion: Antepartum depression in Southeast Asian immigrant brides was significantly associated with life stress as well as lack of emotional support. Emotional support may reduce their life stress and antepartum depression.

• 근관절건강학회지
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• 제20권2호
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• pp.81-90
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• 2013

Purpose: The purpose of this study was to identify factors contributing to health-related quality of life in patients under rehabilitation after stroke. Methods: A descriptive correlational study design was used. Ninety-two stroke patients under rehabilitation from a university hospital were included. Data were collected on March and April, 2013 using structured questionnaires. Hierarchial multiple regression analysis was used to identify factors influencing health-related quality of life. Results: There were significant differences in health-related quality of life according to type of impairment. The health-related quality of life had significant correlations with age, functional dependency, and stress. Factors influencing health-related quality of life for stroke patients under rehabilitation were stress, functional dependency, type of impairment, and age, which explained about 34.5% of total variance. Conclusion: To promote health-related quality of life for stroke patients under rehabilitation, stress and functional dependency should be managed in this population, especially for older adults. Also these results can be utilized in the development of program for helping rehabilitation of stroke patients. The effect of depression and anxiety on health-related quality of life should also be addressed in future research.

• 디지털융복합연구
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• 제14권3호
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• pp.299-307
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• 2016

본 연구는 뇌파를 변화시키는 훈련 뉴로피드백이 일부 여대생들의 생활 스트레스와 우울에 미치는 영향을 알아보기 위해 융복합 연구를 실시하였다. 중재는 실험군 26명, 대조군 26명으로 나누어 8주 동안 실시하였으며 본 연구의 결과는 다음과 같았다. 첫째, 실험군과 대조군 모두 중재 전후를 비교하여 생활 스트레스가 감소되었으며, 실험군이 대조군에 비해 생활 스트레스가 통계학적으로 유의하게 감소됨을 확인할 수 있었다. 둘째, 실험군과 대조군 모두 중재 전후를 비교하여 우울이 감소되었으며. 실험군이 대조군에 비해 우울이 통계학적으로 유의하게 감소됨을 확인할 수 있었다. 이러한 결과들로 보아 뉴로피드백 훈련이 생활 스트레스와 우울 감소에 긍정적인 효과가 있음을 기대할 수 있다.

• ALGAE
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• 제39권1호
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• pp.17-30
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• 2024

Red macroalga Pyropia yezoensis is a high valuable cultivated marine crop. Its acclimation to cold stress is especially important for long cultivation period across winter in coasts of warm temperate zone in East Asia. In this study, the response of P. yezoensis thalli to low temperature was analyzed on physiology and transcriptome level, to explore its acclimation mechanism to cold stress. The results showed that the practical photosynthesis activity (indicated by Φ_PSII and qP) was depressed and pigment allophycocyanin content was decreased during the cold stress of 48 h. However, the F_v/F_m and non-photochemical quenching increased significantly after 24 h, and the average growth rate of thalli also rebounded from 24 to 48 h, indicating a certain extent of acclimation to cold stress. On transcriptionally, the low temperature promoted the expression of differentially expressed genes (DEGs) related to carbohydrate metabolism and energy metabolism, while genes related to photosynthetic system were depressed. The increased expression of DEGs involved in ribosomal biogenesis and lipid metabolism which could accelerate protein synthesis and enhance the degree of fatty acid unsaturation, might help P. yezoensis thallus cells to cope with cold stress. Further co-expression network analysis revealed differential expression trends along with stress time, and corresponding hub genes play important roles in the systemic acquired acclimation to cold stress. This study provides basic mechanisms of P. yezoensis acclimation to cold temperature and may aid in exploration of functional genes for genetic breeding of economic macroalgae.

• 보건의료생명과학 논문지
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• 제9권1호
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• pp.203-211
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• 2021

본 연구에서는 코로나19 유행 상황에서 대학생의 삶의 질에 영향을 줄 수 있는 요인으로 불안, 우울, 스트레스와 자아탄력성의 정도를 파악하고 이들의 상관관계를 분석하였다. 또한 자아탄력성, 스트레스 및 삶의 질에 대한 인과 관계와 매개효과를 분석함으로써 삶의 질을 개선하기 위해 필요한 대책들을 제안하고자 하였다. 변수들의 신뢰도 분석 후, 각 변인 간의 상관관계를 알아보기 위해 Pearson 상관계수를 산출한 결과 불안, 우울, 스트레스, 삶의 질 및 자아탄력성은 모두 유의미한 상관관계를 가지는 것으로 나타났다. 특히 자아탄력성, 스트레스 및 삶의 질에 대한 인과 관계와 매개효과를 확인한 결과, 자아탄력성이 삶의 질에 미치는 영향에서 스트레스가 완전 매개역할을 하는 것으로 나타났다. 본 연구가 코로나 상황에서의 스트레스 및 자아탄력성이 삶의 질 향상에 미치는 영향에 대한 연구의 근거자료로 활용되기를 바란다.

• 한국산학기술학회논문지
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• 제20권7호
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• pp.192-202
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• 2019

본 연구는 대학생의 자아 존중감, 자아 탄력성, 충동성, 생활스트레스가 스마트폰 중독에 영향을 미치는 요인을 확인하기 위한 서술적 조사연구이다. 연구대상자는 일부 지역 대학생을 대상으로 하였고, 자료수집기간은 2018년 11월부터 12월까지이며, 분석대상은 231명 이었다. 자료 분석은 일반적 특성에 따른 스마트폰 중독의 차이를 알아보기 위하여 빈도, 백분율, t-test로 분석을 하였고, 스마트폰 중독과 중요변수의 상관관계는 Pearson's correlation을 이용하였으며, 스마트폰 중독에 미치는 영향요인을 Multiple regression으로 분석 하였다. 그 결과 성별, 대학생활 만족도, 스마트폰 사용시간, SNS 사용시간, 자아 탄력성, 충동성, 생활스트레스가 스마트폰 중독에 유의한 영향을 미치는 요인으로 나타났다. 일반적 특성에 따른 스마트폰 중독과의 관련성에서는 성별에서 여학생이, 대학생활에 만족하지 않는 군에서, 스마트폰 사용시간과 SNS 사용시간이 많은 군에서 스마트폰 중독 수준이 높았다. 또한 스마트폰 중독과의 상관관계에서는 자아 탄력성은 스마트폰 중독과 음의 상관관계를, 충동성, 생활스트레스는 스마트폰 중독과 양의 상관관계로 나타났다. 다변량 회귀분석 결과 대학생의 스마트폰 중독에 성별, 자아 탄력성, 생활스트레스가 중요한 영향을 미치는 요인으로 나타났으며, 이들의 설명력은 35.6%이었다. 결론적으로, 대학생의 스마트폰 중독을 예방하기 위해서는 대학생활을 개선하여 스트레스 환경을 최소화 하는 학교차원의 프로그램 개발이 필요하며, 자신의 삶을 통제할 수 있는 힘을 기를 수 있는 환경 조성이 필요하다고 하겠다.