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김지영 ( Ji Young Kim ),신기수 ( Gi Soo Shin ),박영미 ( Young Mi Park ),임은주 ( Eun Ju Lim ),남현아 ( Hyun A Nam ) 한국간호과학회 정신간호학회(구 대한간호학회정신간호학회) 2011 정신간호학회지 Vol.20 No.4
Purpose: The purpose of this study was to investigate in-depth and to understand the experience of people living with HIV who work as caregivers for patients with AIDS. Methods: Data were collected from December 2010 to April 2011 through focus group and in-depth interviews. Ten people with HIV who work as caregivers for patients with AIDS participated in the research. Data were analyzed using Colaizzi`s method (1978). Results: The results showed the important themes to be ``feelings of sympathy``, ``burden of caregiving``. ``identifying one`s own self-worth` and ``hoping for a meaningful future``. People with HIV experienced deep empathy with patients with AIDS, and, even though they suffered physical and emotional distress from the caregiving process, they felt a sense of self-worth and found their existence connected with the world. Furthermore, they were taking more active care of themselves and hoping for a meaningful future. Conclusion: For successful social adaptation of people with HIV currently in job-seeking activities, various vocational rehabilitation services are necessary. The results of this study could be used in developing effective social support services for people living with HIV attempting workforcere-entry.
기존 업무시설의 에너지 성능 관리를 위한 운영실태 조사 항목 도출
김혜기(Hye-Gi Kim),김지영(Ji-Young Kim),김영돈(Young-Don Kim),김선숙(Sun-Sook Kim) 한국생활환경학회 2020 한국생활환경학회지 Vol.27 No.1
As demand for energy improvement of existing buildings increases, the importance of building information to evaluate energy performance is increasing. It is necessary to collect and analyze energy performance related data since the operation or occupancy characteristics of existing buildings have a great impact on energy use. To manage the energy performance of existing buildings, the purpose of this paper is to survey and analyze the energy use characteristics of public office buildings in Korea, including operational conditions. Sampling was conducted and survey items were estabilshed based on the domestic and international survey cases. Next, we showed the importance and necessity of systematic investigation through correlation analysis between survey items and single regression analysis on energy consumption.
김지영(Ji-Young Kim),Abdul Rheman,심기동(Gi-Dong Sim) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Nickel-titanium (NiTi) alloy thin films are attractive for micro-scale applications because of its fast response on temperature by high surface area, large work output, and higher strain recovery. In terms of superelasticity, Ni-rich NiTi alloys is primarily used due to enhanced phase transformation stability. As it is well known that the mechanical behavior of materials is scale dependent, it is crucial to understand size-effect on the mechanical behavior of NiTi for reliable operation in micro-scale devices. Therefore, in this study, mechanical behavior of Ni-rich NiTi thin films was characterized to identify the effect of the Ni concentration on superelasticity. Free-standing Ni-rich NiTi thin films were fabricated by sputter deposition followed by micro-electro-mechanicalsystem (MEMS) process. Tensile tests were conducted using a custom-built micro tensile tester. Films with higher Ni concentration showed improved strength with enhanced phase transformation stability.
국내산 더덕의 Tangshenoside I과 Lobetyolin 정량분석
황병순,김지영,장미,김기창,박영희,황인국,Hwang, Byung Soon,Kim, Ji Yeong,Jang, Mi,Kim, Gi-Chang,Park, Young-Hee,Hwang, In Guk 한국식품영양학회 2018 韓國食品營養學會誌 Vol.31 No.6
Deoduk (Codonopsis lanceolata) has a complex chemical composition that includes polyphenols, saponins, amino acids, and other unidentified compounds. The contents of tangshenoside and lobetyolin are considered as standard of quality evaluation of Deoduk. In this study, an ultra-performance liquid chromatography (UPLC) method was developed for the quantitative determination of the two marker constituents, tangshenoside and lobetyolin. The methods for determining the standards of quality were validated by measuring their linearity, specificity, limit of detection (LOD), limit of quantification (LOQ), precision, and accuracy using UPLC. Reversed-phase UPLC analysis was conducted quantitatively to identify individual tangshenoside and lobetyolin in Deoduk extracted with 50% (v/v) aqueous ethanol. We used 21 samples to carry out quantitative analysis of tangshenoside and lobetyolin. Based on their dry weights, the levels of tangshenoside and lobetyolin were 0.36~3.54 mg/g, 0.24~1.29 mg/g, respectively. These results will be valuable as basic data for standardization of Korean Deoduk.
마우스 및 랫드에서 botulinum toxin type A의 단회 및 28일 반복투여 독성시험
전태원,김지영,현선희,김남희,이상규,김춘화,우희동,양기혁,정현호,정태천,Jeon, Tae-Won,Kim, Ji-Young,Hyun, Sun-Hee,Kim, Nam-Hee,Lee, Sang-Kyu,Kim, Chun-Hwa,Woo, Hee-Dong,Yang, Gi-Hyeok,Jung, Hyun-Ho,Jeong, Tae-Cheon 대한수의학회 2003 大韓獸醫學會誌 Vol.43 No.1
Single and 28-day repeated dose toxicity studies of botulimnn toxin type A were carried out in ICR mice and Sprague-Dawley rats, respectively. In the single dose toxicity study, botulinwn toxin was injected intraperitoneally to male and female mice at a single dose of 40, 59, 89 133 and 200 ng/10 ml saline/kg. All animals died from 59 ng/kg group. Some clinical signs, such as decrease in locomotor activity, dyspnea, prone position and ptosis, were observed in most of both sexes from 59 ng/kg group, but no signs were seen in all animals at 40 ng/kg group. The results showed that the median lethal dose of botulinum toxin might be in the range of 40-59 ng/kg in both sexes. In the repeated dose toxicity study, the test material was administered intradermally for 28 days at doses of 0 (vehicle-treated control), 1.25, 2.5, 5.0 and $10.0ng/head/50{\mu}{\ell}$ saline in male and female rats. No test material-related changes were noted in survivals, clinical signs, food and water consumptions and gross finding in any group. Botulinum toxin treatment significantly decreased the body weight gain rate in male of 5.0 ng/head group and over and in female of 10.0 ng/head group compared to vehicle-treated control. One or more relative organ weights (i.e., spleen, thymus, liver and kidney) were increased significantly from 5.0 ng/head group compared to vehicle-treated control in both sexes. Serum biochemistry revealed increases in aspartate aminotransferase (AST), alanine aminotransferase (ALT), creatine phosphokinase, total protein and albumin in male, and increases in AST and ALT and decreases in $K^+$ and $Cl^-$ in female without dose-pendent manners. In the histopathological study, physical stimulation by needle caused slight inflammations of dennis. In addition, botulinum toxin treatment induced denervation of nerve cell and disuse of muscle, resulting in atrophy of skeletal muscle in both sexes from 2.5 ng/head group. When the antibodies to toxin were determined in all animals, a significant increase in serum antibodies was observed from 5.0 ng/head group. The results showed that the NOAEL of botulinum toxin might be 1.25 ng/head for 28-day repeated dose toxicity in rats.
섬모시풀(Boehmeria nivea var. nipononivea) 추출물의 항산화, 항균 및 항염증 효과에 대한 연구
정기수 ( Gi Soo Jung ),이선희 ( Sun Hee Lee ),양수경 ( Soo-kyung Yang ),문성필 ( Sung Pil Moon ),송관필 ( Gwanpil Song ),김지영 ( Ji Young Kim ) 대한화장품학회 2020 대한화장품학회지 Vol.46 No.4
본 연구는 섬모시풀 70% 에탄올 추출물과 분획물에 대한 천연 화장품 소재의 가능성에 대해 조사하였다. 섬모시풀을 70% 에탄올 추출물과 헥산, 디클로로메탄, 에틸아세테이트, 부탄올 등의 순차적으로 용매별 분획을 제작하였다. DPPH과 ABTS 시험결과, 에틸아세테이트 분획물은 우수한 라디칼 소거 활성을 보였다. 항균활성은 Staphylococcus aureus, Staphylococcus epidermidis, Cutibacterium acnes와 항생제내성균주에 대해서 paper disc 방법, 최소저해농도 및 생육억제율을 조사하였다. 그 결과, S. aureus, S. epidermidis, C. acnes 균주에 디클로로메탄과 에틸아세테이트 분획물에서 추출물과 다른 분획물에 비해 우수한 항균력을 확인하였다. 또한, 에틸아세테이트 분획물은 lipopolysaccharide (LPS) 처리한 RAW 264.7 Cell에서 NO 생성억제 활성을 확인하였다. 이로써 섬모시풀 추출물과 분획물은 세포독성이 없으며, 항산화, 항균 및 항염 효과를 보였다. 이 결과는 섬모시풀 추출물과 분획물이 항산화 활성을 가지는 효과적인 화장품 소재로 적용 가능하다는 것을 시사한다. The purpose of this study was to investigate the possible use of the Boehmeria nivea var. nipononivea extract and fractions for the development of natural cosmetic ingredients. The leaves of B. nivea var. nipononivea, extracted by 70% ethanol, were sequentially fractionated with n-hexane, dichloromethane, ethylacetate, and n-butanol. As a result of DPPH and ABTS test, ethyl acetate fractionation was shown to be excellent in radical scavenging activity. For the antimicrobial activities against Staphylococcus aureus, Staphylococcus epidermidis, Cutibacterium acnes and antibiotic resistant strains, MIC and birth control rate were observed by paper disc method. In the antibacterial activity by the disc diffusion assay against S. aureus, S. epidermidis and C. acnes, the dichloromethane and ethylacetate fraction showed stronger antibacterial activity than the other fractions and extract. Moreover, the ethylacetate fraction showed strong nitric oxide (NO) production inhibitory effect in lipopolysaccharide (LPS)-stimulated RAW 264.7 cell. In conclusion, we found that B. nivea var. nipononivea extract was not cytotoxic and showed antioxidant, antimicrobial and anti-inflammatory effects. These results suggest that the Boehmeria nivea var. nipononivea extract and fractions could be applied as an effective cosmetic material with antioxidant activity.