• Journal of Microbiology and Biotechnology
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• 제16권7호
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• pp.1032-1040
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• 2006

Some Pseudomonas species can grow on styrene as a sole carbon and energy source. From the new isolate Pseudomonas putida SN1, the genes for styrene catabolism were cloned and sequenced. They were composed of four structural genes for styrene monooxygenase (styA and styB), styrene oxide isomerase (styC), and phenylacetaldehyde dehydrogenase (styD), along with two genes for the regulatory system (styS and styR). All the genes showed high DNA sequence (91% to 99%) and amino acid sequence (94% to 100%) similarities with the corresponding genes of the previously reported styrene-degrading Pseudomonas strains. A recombinant Escherichia coli to contain the styrene monooxygenase from the SN1 was constructed under the control of the T7 promoter for the production of enantiopure (S)-styrene oxide, which is an important chiral building block in organic synthesis. The recombinant E. coli could convert styrene into an enantiopure (S)-styrene oxide (ee >99%) when induced by IPTG The maximum activity was observed as 140 U/g cell, when induced with 1 mM IPTG at $15^{\circ}C$.

• 대한불안의학회지
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• 제9권2호
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• pp.140-146
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• 2013

Objective : There have been few comprehensive studies on the analysis of 24-hour HRV of major depressive disorder (MDD). The purpose of this study was to compare the autonomic nerve system of patients with a MDD with healthy patients and to examine the physiologic and clinical effects of 24-hour HRV by analyzing whether the HRV demonstrates the level of depressive symptoms after improving the symptoms in patients with a MDD. Methods : The 24-hour HRV was measured in patient groups with a MDD (n=16) and control groups (n=16). The patients with a MDD received the follow up test for two months after the treatment. Results : There were significant differences among the indexes (SDNN, rMSSD, SDNN index, and pNN50) of time-domain analysis and the indexes (TP, VLF, LF, HF, and ULF) of frequency-domain analysis of HRV between patient and control groups. The means of RR, SDNN, SDANN, and TP increased after two month of the treatment, comparing them with before the treatment, but there were no statistical significance. Conclusion : The results of 24-hour HRV analysis indicated significant decrease of HRV indexes among MDD patients which may suggest decrease of parasympathetic nervous functions.

• 중환자간호학회지
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• 제12권2호
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• pp.39-49
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• 2019

Purpose : The purpose of this study was to identify the extent to which intensive care unit (ICU) nurses' perceptions of life-sustaining treatment decisions and "a good death" affect attitudes toward terminal care. Method : Participants included 109 ICU nurses from three university hospitals. Data were collected using structured questionnaires, and collected data were analyzed using a t-test, ANOVA, the $Scheff{\acute{e}}$ test, Pearson correlation coefficients, and a multiple regression analysis (SPSS 24.0 program). Results : Perceptions of life-sustaining treatment decisions and a sense of closeness (a constituent for the awareness of "a good death") were positively correlated with terminal care attitudes. The factors affecting terminal care attitudes were a clinical career in ICU (${\beta}=.20$, p =.035), a sense of closeness(${\beta}=.19$, p =.041), and the perception of a life-sustaining treatment decision (${\beta}=.22$, p =.017). This finding indicates that more than 10 years of experience in ICU, a greater sense of closeness, and a higher view of life-sustaining treatment decisions results in more positive attitudes toward terminal care. The explanatory power of these variables on terminal care attitudes was 14% (F=6.84, p < .001, Adj $R^2=.140$). Conclusion : A sense of closeness and the perception of life-sustaining treatment decisions were identified as the factors affecting terminal care attitudes. Thus, various programs must be developed to raise awareness among ICU nurses of "a good death" and perceptions of life-sustaining treatment decisions.

• Clinical Pain
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• 제20권2호
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• pp.135-140
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• 2021

MiraDry^®, a microwave thermolysis device, is comparably new non-surgical agent in the field of eradication of sweat glands for treating axillary hyperhidrosis and osmidrosis. So far, altered sensation, swelling, and compensatory sweating are widely known as adverse effects of MiraDry^®. Of the few reported MiraDry^®-induced neuropathy cases, median and ulnar neuropathies are common. Although, one case has described radial nerve and posterior cord damage with maximized stimulation intensity, musculocutaneous nerve damage induced by MiraDry^® has not been reported. Here, we report a case of a 30-year-old woman experiencing left hand weakness after receiving MiraDry^® at a local dermatology clinic. Left brachial plexopathy, mainly involving the median nerve and the musculocutaneous nerve with partial axonotmesis, was confirmed by electrodiagnostic studies. Ultrasound evaluation showed corresponding results. This is the first case report of the musculocutaneous neuropathy by MiraDry^®.

• 한방재활의학과학회지
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• 제31권4호
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• pp.117-127
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• 2021

Objectives Previously, we demonstrated that a 5% ethanol extract of unripe Rubus coreanus (5-uRCK) and ellagic acid has hypocholesterolemic and antiobesity activity in high-fat diet-fed animals. Therefore, we conducted a clinical study on the anti-obesity effect of 5-uRCK in 140 Korean adults (aged 19-70 years, body mass index (BMI) ≥25 kg/m²). Methods The participants were randomly assigned to two groups and were administered the placebo (n=70) or 5-uRCK extract (800 mg, n=70) daily for 12 weeks. The subjects were instructed to maintain their usual dietary intake and normal physical activity. Anthropometrics, body composition (dual-energy X-ray absorptiometry), and blood parameters were compared between the two groups. Results Average body weight and BMI did not show any significant changes; however, changes in upper body fat mass between the two groups was significantly different, as determined using analysis of covariance adjusted for baseline of percent body fat and drinking units. Moreover, Although not significant, the trunk fat mass and percent trunk fat tended to decrease after 5-uRCK supplementation. There was no significant difference in other laboratory biomarkers between the two groups. All safety parameters were within normal ranges in the both group. Conclusions In the present study, 5-uRCK significantly reduced upper body fat in obese subjects after 12 weeks, which indicates that it may help improve android-type obesity. Furthermore, the supplement is safe and well tolerated.

• 농약과학회지
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• 제20권1호
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• pp.14-22
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• 2016

메타분석이라는 통계적 기법을 이용하여 일상생활에서 많이 사용되는 식품가공처리 (수돗물 세척, 껍질제거, 데치기 및 오븐건조)에 의한 농산물 중 농약 잔류량의 변화를 관찰한 기존의 문헌들이 제공하는 데이터들을 통계적으로 통합하고 정량화하는 작업을 수행하였다. 각 식품가공처리법의 가중평균 response ratio ($R^*$)를 살펴보면 껍질제거는 0.140, 데치기는 0.344, 오븐건조는 0.462 및 수돗물 세척은 0.522이었으며 껍질제거에 의해 농산물 중 잔류농약이 최대로 감소됨을 확인할 수 있었다. 수돗물 세척에 의한 12종 농약성분의 옥탄올물분배계수와 가중평균 response ratio ($R^*$)와의 상관분석을 실시한 결과, 피어슨상관계수는 r=0.624 (p=0.03)로서 양의 상관관계가 있음을 확인하였다. 본 연구결과는 보다 정확한 위해성 평가를 위한 가공계수를 산출하는데 참고자료로 활용될 수 있으며 또한 잔류농약과 식품안전성에 대한 소비자의 이해를 돕는 자료로도 활용될 수 있을 것이다.

• 한국환경과학회지
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• 제18권10호
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• pp.1135-1141
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• 2009

Carrots (Daucus carota L.) are consumed as an important dietary source of provitamin A including $\beta$-carotene, $\alpha$-carotene and lutein. An HPLC method was applied to determine the content of the carotenoid composition in carrot cutivars cultivated in Korea. HPLC analyses were carried out with five carrot cultivars (Socheon-5-chon, Hongsim-5-chon, Myeongju-5-chon, Seonhongbom-5-chon and Betarich) sown at April, 2007 and six cultivars (Yeoreum-5-chon, Hanyeoreum-5-chon, Sinheukjeon-5-chon, Bibariheukjeon, Manina and Betarich) sown at August of the same year. In general, the former varieties are not used for the sowing at summer because of their bolting (growth of floral axis). The former and the latter carrots were harvested after 110 and 96 days from seeding, respectively, and the carotenoids were extracted with acetone after freeze-drying. The amount of $\alpha$-carotene ($117.7{\sim}205.3\;{\mu}g/g{\cdot}DW$) was similar to that of $\beta$-carotene ($113.1{\sim}189.6\;{\mu}g/g{\cdot}DW$) for the carrot cultivars sown at spring, while the content ($46.2{\sim}71.1\;{\mu}g/g{\cdot}DW$) was about a half of $\beta$-carotene content ($92.5{\sim}140.2\;{\mu}g/g{\cdot}DW$) for the latter cultivars. In addition, the average content of lutein ($25.2\;{\mu}g/g{\cdot}DW$) in the former cultivars was eight times higher than that in the latter cultivars ($3.1\;{\mu}g/g{\cdot}DW$). Among the spring cultivation types, Socheon-5-chon and Myeongju-5-chon showed higher amount of $\alpha$-carotene and $\beta$-carotene, while the higher amount was determined in Yeoreum-5-chon and Sinheukjeon-5-chon among the autumn cultivation types. Validation of the HPLC-DAD method showed good linearity ($r^2$ > 0.997) of the three compounds analyzed in a wide concentration range ($0.025{\sim}20\;{\mu}g/ml$). The R.S.D. values for intra-day and inter-day precision were less than 19.2% and the mean recovery of each compound was 85.4~104.7%.

• 한국엔터테인먼트산업학회논문지
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• 제13권4호
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• pp.401-410
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• 2019

병원 입원환자들이 갈수록 고령화되고 질병의 중증도가 높아져서 섬망 발생율이 증가하고 있다. 본 연구는 간호학생들을 대상으로 섬망지식, 섬망간호 자신감과 섬망간호 수행도를 파악하고, 이들 요인들이 섬망간호 수행도에 미치는 영향을 규명함으로써 섬망간호 교육전략에 기초자료를 제공하고자 시도하였다. 연구 대상자는 G시에 소재한 3개교의 간호학과 4학년 학생 252명이며, 자료수집 방법은 2017년 4월부터 9월까지 구조화된 설문지를 통하여 수집하였다. 섬망지식은 조귀래(2001)가 개발하고 박용숙(2011) 수정한 도구, 섬망간호 자신감은 Akechi 등(1996)이 개발하고 김문자(2014)가 번역하고 수정 보완한 도구, 섬망간호 수행은 서희정과 유양숙(2006)이 개발한 도구를 김미영과 은영(2013)이 수정 보완한 도구를 사용하였다. 수집된 섬망간호 수행에 영향요인에 대한 자료는 단계적 다중 회귀분석으로 분석하였다. 대상자의 섬망 지식은 47점 만점에 29.0점, 섬망간호 자신감은 150점 만점에 71.7점, 섬망간호 수행은 69점 만점에 41.2점으로 나타났다. 대상자의 일반적 특성에 따른 섬망간호 수행은 섬망환자 경험(t=7.719, p<.001), 섬망 간호진단 사용 경험(t=4.850, p=<.001), 섬망간호 교육(t=3.039, p=.003), 임상실습 만족도(t=3.526, p=.001), 섬망환자 경험 부서(t=3.446, p=.001), 중환자실 실습 경험(t=5.349, p<.001)에 따라 유의한 차이를 나타냈다. 섬망간호 수행은 섬망 지식(r=.140, p=.026)과 섬망간호 자신감(r=.341, p<.001) 간에 유의한 순 상관관계가 있었다. 섬망간호 수행에 가장 주요한 예측 요인은 섬망환자 간호 경험(β=.314, p<.001) 섬망간호 자신감(β=.174, p=.003), 중환자실 실습 경험(β=.170, p=.001), 섬망 간호진단 사용경험(β=.129,p=.026), 실습만족도(β=.109, p=.048)의 순으로 나타났다. 모형의 설명력은 28.8%였다(F=22.307, p<.001). 본 연구결과, 간호학생들의 섬망간호 수행을 높이기 위해 섬망환자 간호 경험, 섬망간호 자신감, 중환자실 실습 경험, 섬망관련 간호진단, 실습만족도를 고려한 섬망간호 교육전략의 개발이 필요하다.

• KSBB Journal
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• 제23권4호
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• pp.329-334
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• 2008

오가피는 건강보조식품, 식품이나 화장품 등의 첨가제로 좋은 약재로 평가되고 있다. 그러나 오가피의 연구의 대부분은 가온 용매추출이나 열수추출을 통한 유효성분의 추출과 생리활성 연구에 치중되어 있다. 따라서 온도 및 추출용매를 조절하여 추출하고 Diaion HP2O 분획을 통한 유효성분의 함량 및 항산화활성에 대하여 연구하였다. 오가피추출물은 열에 불안정하여 갈변현상을 보이므로 상온추출 및 냉온추출하는 것of 좋으며, 에탄올 함량별로 추출시 주 활성성분인 chlorogenic acid의 함량을 보면 100% 정제수 및 100% 에탄올의 단일 용매 추출보다 에탄올수용액을 사용하여 추출시 chlorogenic acid의 함량이 증가함을 알 수 있었다. 에탄올수용액에서의 chlorogenic acid의 함량은 유사하므로 농축시간을 고려하여 70$\sim$85% 에탄올수용액으로 추출하는 것이 바람직할 것으로 사료된다. 최적화된 조건에서 추출된 오가피추출물은 Diaion HP2O column chromatography를 이용하여 10%, 20%, 40%, 60% 에탄올수용액으로 분획 후, 각 분획층의 주 활성성분 합량과 항산화효과를 확인하였다. 10% 및 20% 에탄올 수용액층은 chlorogenic acid가 주 구성성분이었으며, 40% 에탄올 수용액층은 caffeic acid 및 eleutheroside E가 주 구성성분임을 알 수 있었다. Chlorogenic acid와 caffeic acid 함량이 높은 20% 및 40% 에탄올수용액 분획층에서 우수한 DPPH와 superoxide radical에 대한 소거효과를 나타내었다. DPPH radical 소거효과에서 20% 및 40% 에탄올수용액 분획층은 각각 $IC_{50}$ 값이 $1.748{\pm}0.098{\mu}g/ml$, $11.487{\pm}1.768{\mu}g/ml$을 나타내었으며, Superoxide radical 소거효과에서는 $131.491{\pm}2.235{\mu}g/ml$, $200.681{\pm}2.444{\mu}g/ml$로 양성 대조군으로 사용한 ascorbic acid와 동등하거나 dl-$\alpha$-tocopherol보다 우수한 항산화효과를 보였다. 각 분획층의 항산화효과를 미루어 볼 때, 20% 및 40%의 주 구성성분을 조합하여 오가피추출물을 제조하면 더욱 우수한 소재로 개발할 수 있을 것으로 사료된다. 본 기술연구소에서는 최적화된 조건에서 추출된 오가피추출물 및 Diaion HP2O 분획물을 이용하여 B16 melanoma 세포에서의 멜라닌 생성저해 효과를 연구하여 새로운 미백제를 개발 중에 있으며, 건강보조식품, 기능성 향장품소재 등으로의 활용 가치가 높을 것으로 사료된다.

• 한국재료학회지
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• 제20권12호
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• pp.654-660
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• 2010

The influences of Na and K content on the crystal phase, the microstructure and the electrical property of $BaTiO_3$-based thermistors was found to show typical PTC effects. The crystal phase of powder calcined at $1000^{\circ}C$ for 4hrs showed a single phase with $BaTiO_3$, and the crystal structure was transformed from tetragonal to cubic phase according to added amounts of Na and K. In XRD results at $43^{\circ}\sim47^{\circ}$, the $(Ba_{0.858}Na_{0.071}K_{0.071})(Ti_{0.9985}Nb_{0.0015})O_{3-\delta}$ showed (002) and (200) peaks but the $(Ba_{0.762}Na_{0.119}K_{0.119})(Ti_{0.9975}Nb_{0.0025})O_{3-\delta}$ showed (002), (020) and (200) peaks. In sintered bodies, those calcined at $600^{\circ}C$ rather than at $1000^{\circ}C$ were dense, and for certain amounts of Na and K showed rapid decreases in grain size. In relative permittivity, the curie temperature due to the transformation of ferroelectric phase rose with added Na and K but decreased in terms of relative permittivity. In the result of the R-T curve, the sintered bodies have curie temperatures of about $140^{\circ}C$ and the resistivity of sintered bodies have scores of $\Omega{\cdot}cm$; the jump order of sintered bodies was shown to be more than $10^4$ in powder calcined at $1000^{\circ}C$.