• Title/Summary/Keyword: combined stress

Search Result 1,066, Processing Time 0.031 seconds

Tuber quality of Ashwagandha (Withania somnifera Duanal) affected by different growth conditions

  • Kaliyadasa, Ewon;Jayasinghe, Lalith;Peiris, Sriyani
    • Korean Journal of Agricultural Science
    • /
    • v.46 no.1
    • /
    • pp.151-161
    • /
    • 2019
  • Ashwagandha (Withania sominifera Duanal) is an important medicinal herb with increased demand after discovering its anti-stress and sex stimulating properties that are attributed to the presence of biologically active alkaloid compounds. The aim of this study was to elucidate a proper agro technological package that ensures the optimum growth of Ashwagandha to obtain the finest quality without degrading the pharmacologically active constituents. Mixtures of organic and inorganic fertilizers were combined with direct seeding and transplanted as four different treatments in this study. The fresh and dry weights of the tubers were recorded up to 12 months starting from two months after sowing (MAS) while the shoot height, root length, number of leaves, fresh and dry weights of the shoot and the root with a shoot ratio of up to 6 MAS were determined. The results revealed that the growth of Ashwagandha was not affected significantly by the method of planting, type of fertilizer or their combinations during most of the harvests. However, tubers harvested at 6 MAS had the highest recorded dry tuber weight per plant in all four treatments compared to the early harvests where two direct seeded treatments had the best results. Comparison of the phytochemical compounds showed that direct seeding with organic fertilizer had the highest recorded values for alkaloid and withaferine A contents with a lower percentage of fiber compared to the treatments with inorganic fertilizer. In conclusion, direct seeding with organic fertilizer and tubers harvested at 6 MAS are recommended as the best cultivation conditions and harvesting stage to obtain high quality tubers of Ashwagandha, respectively.

Analysis of Internal Pressure Capacity of Modular Containment Structure for Small Modular Reactor (소형 원자로용 모듈화 격납구조의 내압성능 분석)

  • Park, Woo-Ryong;Yhim, Sung-Soon
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.20 no.8
    • /
    • pp.362-370
    • /
    • 2019
  • The internal pressure capacity of a modular containment structure requires analysis to prevent the release of radioactive material in the case of an accident. To analyze the capacity, FEM models were prepared while considering the tendon arrangements and the contact surfaces between precast concrete modules, and then static analyses were carried out. The changing characteristics in the displacement and stress under step-wise loading were analyzed, along with the effects of selected parameters. For comparison, the capacity of a monolithic containment structure was also analyzed. Parametric analyses were done to suggest ranges of parameters such as the tendon force, tendon spacing, tendon location in concrete thickness direction, friction coefficient, and concrete thickness. The tendon force and frictional force provide a combined effect between contact surfaces of modules. The same level of internal pressure capacity can be secured even in the modular containment structure as in the monolithic containment structure by increasing the tendon force with additional tendons.

Development of transgenic potato with improved anthocyanin contents using sweet potato IbMYB1 gene (고구마의 IbMYB1 유전자를 이용한 안토시아닌 고함유 형질전환 감자의 개발)

  • Kim, Yun-Hee;Han, Eun-Hee;Kwak, Sang-Soo;Lee, Shin-Woo
    • Journal of Plant Biotechnology
    • /
    • v.45 no.4
    • /
    • pp.364-368
    • /
    • 2018
  • The R2R3-type protein IbMYB1 transcription factor is a key regulator for anthocyanin biosynthesis in the storage roots of sweet potatoes. It was previously demonstrated that the IbMYB1 expression stimulates anthocyanin pigmentation in tobacco leaves, arabidopsis and storage roots of sweet potatoes. In this study, we generated the transgenic potato plants that express the IbMYB1 genes, which accumulated high levels of anthocyanins under the control of either the tuber-specific patatin (PAT) promoter or oxidative stress-inducible peroxidase anionic 2 (SWPA2) promoter. The PAT-MYB1 transgenic lines exhibited higher anthocyanin levels in the tuber than the empty vector control (EV) or SWPA2-MYB1 plants. When combined, our results indicated that overexpression of the IbMYB1 is a highly promising strategy for the generation of transgenic plants with enhanced tissue specific anthocyanin production.

Analysis of Leigh Bowery's works through Bakhtin's discourse on the grotesque body (바흐친의 그로테스크 몸 담론을 통한 리 보워리의 작품 분석)

  • Kim, Hyun Jung;Yim, Eunhyuk
    • The Research Journal of the Costume Culture
    • /
    • v.26 no.6
    • /
    • pp.823-835
    • /
    • 2018
  • The body is an important object of costume expression, and the reflection of the aesthetics of the body according to age, culture, individual or group determines the form of the costume. In particular, British artist Leigh Bowery provided many designers and celebrities with original design ideas. Leigh Bowery's costumes are related to the carnival concept. Thus, this study analyzed Leigh Bowery's life and works, and examined Michael Bakhtin's grotesque carnivalesque theory. Based on Bakhtin's carnival theory around 100 works by Leigh Bowery, in the form of YouTube videos and DVD clips were analyzed in this study. The results of the analysis Leigh Bowery's body and costume research are as follows. First, this study can define fetishism as a characteristic of costumes such as body suits, harnesses, high-heeled boots, and stockings, that stress the body. Second, the character of the body is not expressed as that of an idealized body, but the fat and ugly aspect are revealed. Third, Leigh Bowery's costumes are characterized by ambiguity. The costumes blur the boundaries between women and men. Fourth, common sense, combined with normal and bizarre, brings out a strong sense of carnival humor with ridiculousness arising from the gap between reality and reality. His performance has had a significant impact on victims of discrimination or unequal treatment in sexual, racial, and age-related situations. This study should inspire many designers through the study of Leigh Bowery's body expression and dress, but it also introduces fashion icons that are not well known in Korea.

Meditation for Alzheimer's Disease: Systematic Review and Meta-Analysis

  • Lee, Go eun;Kim, Sang ho;Jung, In chul;Kang, Hyung won
    • Journal of Oriental Neuropsychiatry
    • /
    • v.30 no.3
    • /
    • pp.237-249
    • /
    • 2019
  • Objectives: Interest in the use of complementary and alternative treatments to treat dementia. Meditation is used to treat various symptoms of physical and psychological diseases. Some studies suggest that meditation might have positive effects on cognitive functions, especially attention, in the elderly. However, how meditation affects Alzheimer's disease (AD) patients remains unclear. In this review, we assessed the effectiveness of practicing meditation in combination with standard care in AD. Methods: We searched the CCRCT, MEDLINE, EMBASE, AMED and CINAHL databases on 30 May 2017. We included randomized controlled trials (RCTs) that used meditation in adult patients diagnosed with AD. We allocated patients to a meditation combined with standard care or a standard care-only group. Results: The two RCTs met the inclusion criteria. A total of 98 patients were included in the meditation with standard care and standard care-only groups in this review. All meditation programs in the included trials were based on practicing mindfulness. The results of our meta-analysis indicatedthat adjunctive mindfulness meditation programs exerted favourable but non-significant effects on cognitive function on the Mini Mental State Examination (MMSE) (MD=4.68, 95% CI -0.11 to 9.46; Z=1.92, p=0.06). Only one study assessed depression, anxiety, quality of life and stress. No adverse events related to meditation were reported in the included studies. Conclusions: Insufficient data iscurrently available to determine the effectiveness of practicing meditation on patients diagnosed with AD. Hence, further RCTs with high methodological quality and larger sample sizes are needed to effectively estimate the effects of meditation on AD.

Three Treatment Cases on Combined Korean Medicine of Adult Atopic Dermatitis with Chronic Stress (만성 스트레스를 동반한 성인형 아토피 피부염 환자의 한의 단독 치료 3례)

  • Oh, Dong-Hwan;Kim, Ki-Baek;Jeong, Soung-Youn;Ha, Dong-Lim;Lee, Seung-Ho;Jang, In-Soo;Oh, Yong-Taek;Kim, Jun-Hyung;Choi, Yoo-Min
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
    • /
    • v.34 no.4
    • /
    • pp.198-209
    • /
    • 2021
  • Objectives : The purpose of this study is to report 3 cases of Korean medical treatment on adult atopic dermatitis. Methods : Three patients with adult atopic dermatitits were treated with herbal medicine (Soyo-san hap Samul-tang), acupuncture, and moxibustion. Psychosomatic symptoms were considered the main criteria for treatment. The effects of treatment were evaluated through photographs of the lesions, using EASI and DLQI scores. Results : After treatment, EASI and DLQI scores on three atopic dermatitis patients improved significantly. Conclusions : This clinical case study has demonstrated that Korean medicine may be an effective option for treating adult atopic dermatitis. In addition, considering psychosomatic symptoms when treating atopic dermatitis may also lead to effective treatment.

A Review on the Pain and Depression Comorbidity Animal Models (통증과 우울증의 병합 동물모델에 대한 최신 연구 동향 분석)

  • Song, Ji-Hye;Kook, Hye-Jung;Park, Byung-Jin;Kim, Song-Yi;Park, Ji-Yeun
    • Korean Journal of Acupuncture
    • /
    • v.38 no.2
    • /
    • pp.75-99
    • /
    • 2021
  • Objectives : The purpose of this study is to analyze animal behavioral changes and related neurobiological mechanisms in recent studies using animal models with pain and depression. Methods : We conducted database search in Pubmed, NDSL, and EMBASE up to January 2021. Included studies were classified as depression-like behavior observed in pain model, pain-like behavior observed in depression model, and pain and depression comorbidity model. The results of pain- and depression-like behaviors, the changes of neurobiological mechanisms, and the treatment methods such as drugs, natural substance-derived chemicals, or acupuncture were analyzed. Results : We included 124 studies (81 studies in depression-like behavior observed in pain model, 19 studies in pain-like behavior observed in depression model, and 24 studies in pain and depression comorbidity model). Pain and depression comorbidity animal models were induced using various methods by drugs or surgery. Von frey test, a method for evaluating mechanical allodynia was the most commonly used for measuring pain-like behavior and the forced swimming test was the most commonly used for measuring depression-likes behavior. The changes of neurobiological factors, such as decrease of 5-hydroxytryptamine and increase of oxidative stress and pro-inflammation cytokines were generally changed in the frontal cortex, hippocampus, thalamus, and spinal cord in all types of models. For treating pain and depression-like behaviors, various types of drugs such as antidepressant, tranquilizer, analgesic, and natural substance-derived chemicals were used. Acupuncture treatment was used in 4 studies. Conclusions : In the future, more diverse studies on the combined model of pain and depression need to be conducted. In addition, it is necessary to establish a mechanistic basis for the development of various treatments by identifying the common mechanisms of pain and depression.

Effect of Occupational Exposure to Herbicides on Oxidative Stress in Sprayers

  • Intayoung, Unchisa;Wunnapuk, Klintean;Kohsuwan, Kanyapak;Sapbamrer, Ratana;Khacha-ananda, Supakit
    • Safety and Health at Work
    • /
    • v.12 no.1
    • /
    • pp.127-132
    • /
    • 2021
  • Background: Herbicides such as glyphosate, paraquat, and 2,4-dichlorophenoxyacetic acid have been reported to cause adverse side effects through production of reactive oxygen species. However, there were no data representing the adverse effects of a mixture herbicide usage in farmers, especially the changes in oxidative marker and antioxidant defense. This study aimed to determine the urinary malondialdehyde (MDA) and glutathione (GSH) level in farmers using mixed herbicides. Methods: Ninety-three farmers were recruited, and two spot urine samples (before and after work) were collected. The urinary MDA level was evaluated by thiobarbituric acid reactive substance assay, and the urinary GSH level was determined using the enzymatic recycling method. Results: Sixty-two percent of the participants were men, and 59% of the participants worked in a farm for 20-40 years. The common combinations of herbicide usage were glyphosate with 2,4-dichlorophenoxyacetic acid (36.5%). There was no significant difference between pre- and post-work urinary MDA and GSH levels among the 3 groups of herbicides. However, the urinary MDA levels in farmers using the combination of glyphosate and paraquat were significantly higher than those found in farmers using glyphosate alone. The associated factors with changes in MDA levels found that the exposure intensity index (B = 0.154), the cumulative exposure intensity index (B = 0.023), and wearing gloves while working (B = -2.347) were found to be significantly associated with MDA level. Conclusion: The results suggest that the combined use of glyphosate and paraquat caused a significant increase in urinary MDA levels. Moreover, intensity of exposure to herbicide and wearing gloves were associated with the level of MDA.

A Systematic Review of the Studies on Organizational Socialization (간호학 분야 조직사회화 연구에 대한 체계적 문헌고찰)

  • Byun, Jinyee
    • Journal of Convergence for Information Technology
    • /
    • v.11 no.3
    • /
    • pp.77-86
    • /
    • 2021
  • This study aims to systematically review literature on organizational socialization in the field of nursing. The keywords of 'organizational socialization' and 'nursing' were combined with the AND operator, and the author analyzed the total of 26 journal articles published between 2010 and 2020. The number of journal articles on organizational socialization has increased since 2016, and all the articles took an descriptive study approach. It was found that the variables of resilience, role stress, perception of justice, bullying, professional self-concept, and organizational climate could affect organizational socialization, and the variables of intention to leave, intention on retention, resilience, and organizational commitment could be affected by organizational socialization. The result of this study can be used for guiding organizational socialization research in nursing.

Multi-scale Process-structural Analysis Considering the Stochastic Distribution of Material Properties in the Microstructure (미소 구조 물성의 확률적 분포를 고려한 하이브리드 성형 공정 연계 멀티스케일 구조 해석)

  • Jang, Kyung Suk;Kim, Tae Ri;Kim, Jeong Hwan;Yun, Gun Jin
    • Composites Research
    • /
    • v.35 no.3
    • /
    • pp.188-195
    • /
    • 2022
  • This paper proposes a multiscale process-structural analysis methodology and applies to a battery housing part made of the short fiber-reinforced and fabric-reinforced composite layers. In particular, uncertainties of the material properties within the microscale representative volume element (RVE) were considered. The random spatial distribution of matrix properties in the microscale RVE was realized by the Karhunen-Loeve Expansion (KLE) method. Then, effective properties of the RVE reflecting on spatially varying matrix properties were obtained by the computational homogenization and mapped to a macroscale FE (finite element) model. Morever, through the hybrid process simulation, a FE (finite element) model mapping residual stress and fiber orientation from compression molding simulation is combined with one mapping fiber orientation from the draping process simulation. The proposed method is expected to rigorously evaluate the design requirements of the battery housing part and composite materials having various material configurations.