세제세척 후 용기재질과 헹굼시간에 따른 계면활성제 잔류량 변화

정종신(Jong Shin Jeong),정연훈(Yon Hun Jeong),정승우(Seung Woo Jeong) 大韓環境工學會 2013 대한환경공학회지 Vol.35 No.12

일상생활과 실험실에서 널리 사용하는 대표적 용기를 선정하여 세제세척 및 헹굼 후 용기에 잔류하는 계면활성제의 양을 정량화하였다. 일반적 세제 사용량인 8 mL를 수세미에 묻혀 용기를 닦은 후 흐르는 물에 7초 및 15초간 헹궈주었다. 설거지가 끝난 용기에 증류수 100 mL를 붓고 흔들어 그릇에 남아 있는 계면활성제를 추출하여 분석하였다. 7초 헹굼과정을 거친 후 용기에 잔류하는 계면활성제 농도는 뚝배기 4.68 mg/L, 후라이팬 1.22 mg/L, 유리그릇 0.57 mg/L, 플라스틱 용기 0.25 mg/L 순으로 모든 용기에서 계면활성제가 검출되었다. 그러나 15초 헹굼과정을 거친 경우, 뚝배기에서만 계면활성제가 여전 히 검출되었고 다른 용기에서는 검출되지 않았다. 실험결과 다공성매체로 이루어진 재질일수록 계면활성제의 잔류가 많은 것으로 나타났다. 세제로 식기를 세척할 경우 충분한 헹굼과정이 있어야 세제 섭취를 줄일 수 있을 것으로 판단된다. 특히 많은 이공계실험실에서 실험실 용기가 세제세척 후 충분히 헹궈지지 않는다면 잔류 계면활성제가 이후 실험 결과에 지대한 영향을 미칠 수 있다. This study selected representative popular bowls used in daily life and laboratory and investigated the amount of residual surfactant resided in the bowls that were dish-washed. The bowls were washed by a scourer soaking 8 mL-detergent and then rinsed by flowing water for 7 or 15 seconds. One hundred milliliter of distilled water was placed in the washed-bowls to extract residual surfactant on the bowl surface and then analysed. All washed-bowls included residual surfactant after 7 second-rinsing. Residual surfactant concentrations in Ttukbaegi (earthen bowl), flying pan, glass bowl, and plastic bowl were 4.68, 1.22, 0.57, and 0.25 mg/L, respectively. However, the 15 second-rinsing showed that surfactant was detected only in Ttukbaegi and other bowls were clean. The results showed that surfactant would reside on the porous or rough surface of the bowl even after final rinsing. This study imply that all bowls and glasses should be throughly rinsed after detergent-washing to reduce continuos ingestion. Furthermore, residual surfactant in the glassware of laboratory may significantly affect experiment results.

'活血化瘀'의 동서의학적 이해

우원홍,이승연,김용수,백은경,정영목,정우열 대한동의생리학회,대한동의병리학회 2001 동의생리병리학회지 Vol.15 No.6

At once Medicine of East and West have the same purpose in treating, but there is a difference between the method of medical care and the view/slant on a disease each other. And so it is very important to understand Oriental medicine and Western counterpart, in addition it is meaningful to understand the terminology of Oriental medicine from the slant of Western Medicine. The conception of the Activation of Blood and the Elimination of Blood Stasis (活血化瘀) from Western medical standpoint is rather hard to explain. But It can be explained to clear such abnormal matter in blood as blood depletion of the blood to quicken the blood, but it is widely known to us this conception is too complicated to explain. Accordingly I would like to begin with a survey of Blood-quickening stasis dispelling, a prescription of the herbal formulas in Oriental midical view, and help aim at enlarging the range of our knowledge via theoretical explanation how to make understand it in the viewpoint of Western medicine.

The Successful Anesthetic Management of Cesarean Section for Quadruplets

Jeong Hyun Lee,Soo Chang Son,Seok Hwa Yoon,Woo Seok Jeong,Ho Yon Cho 대한마취과학회 2007 Korean Journal of Anesthesiology Vol.53 No.6

Grand multifetal pregnancies (4 or more), usually caused by ovulation induction agents and assisted reproductive technologies, challenge all members of a perinatal team and put mothers and infants increased risk. Important anesthetic considerations include greater incidence of complications that in the singleton pregnancy, risks related to the large pregnant uterus, impaired uterine contraction prior to delivery secondary to fetal oxygenation, and preparation of sufficient man-power and instruments. The importance of neonatal resuscitation cannot be overemphasized. We report a successful general anesthetic management for an emergent quadruplet cesarean section at 31 weeks 5 days weeks gestational age. (Korean J Anesthesiol 2007; 53: S 48∼50)

Radical Scavenging Activities of Asterina pectinifera Fermented with Cordyceps militaris Mycelia

Yon-Suk Kim,Eun-Kyung Kim,Sithranga Boopathy Natarajan,Jin-Woo Hwang,Seon Geun Kim,Nam-Joo Jeon,Jae-Woong Lee,Jae-Hyun Jeong,김학주,박표잠 한국식품과학회 2016 Food Science and Biotechnology Vol.25 No.suppl1

Asterina pectinifera was fermented with Cordyceps militaris mycelia for improvement of anti-oxidant activities. DPPH, alkyl, hydroxyl, and superoxide radical scavenging activities were evaluated using electron spin resonance. Anti-oxidant activities were also determined based on the ferric reducing anti-oxidant power assays and the ABTS radical scavenging activity. The lipid peroxidation inhibition activity was confirmed using ferric thiocyanate and thiobarbituric acid assays. The free radical scavenging activity and anti-oxidative effects of A. pectinifera fermented with C. militaris mycelia (FACM) extracts were higher than for A. pectinifera and C. militaris mycelia extracts alone. FACM extracts contained different biochemical ingredients due to fermentation of A. pectinifera and provide a beneficial anti-oxidant activity. FACM extracts are a promising source of beneficial antioxidants for use in food industries.

농어촌 지역의 중학교 학생들의 정서적 특성과 정서조절 양식에 관한 연구

채연숙 ( Yon Suk Chae ),김효정 ( Hyo Jeong Kim ),정희태 ( Hee Tae Chung ),이경수 ( Kyung Soo Lee ),노민우 ( Min Woo No ) 한국도서학회 2015 韓國島嶼硏究 Vol.27 No.3

본 연구에서는 이론적 근거와 선행연구들을 토대로 정서적 특성이 정서조절 양식에 미치는 영향에 대해 분석하였다. 본 연구의 목적은 첫째, 농촌 소규모 중학교 학생들의 성별에 의해 인지되는 정서적 특성과 정서조절 양식의 차이에 대해 알아보고, 둘째, 정적정서와 부적정서가 능동적 양식, 회피/분산 양식, 지지 추구양식에 미치는 영향에 대해 분석하는 것이다. 이를 위해 경상북도 S군의 농촌 소규모 중학교 학생들 112명을 대상으로 설문조사를 실시하였고, 정적정서 척도, 부적정서 척도, 능동적 양식 척도, 회피/분산 양식 척도, 그리고 지지추구 양식 척도를 사용하였다. 그 중 불성실한 응답, 무응답, 같은 번호의 응답 1부를 제외하여 총 111부를 최종 유효 표본으로 선정한 후 연구 목적에 맞게 자료 처리하였다. 통계 분석은 SPSS 19.0을 사용하여 신뢰도 분석, 상관관계 분석, 평균차이검증 및 다중회귀분석을 실시하였다. 본 연구의 결과를 요약하면 다음과 같다. 분석결과 정적정서는 능동적 양식(.283)과 지지추구 양식(.284)과 정적 상관관계를 보였으며, 부적정서는 회피/분산 양식(.263)과 정적상관이 있는 것으로 나타났다. 성별에 따른 평균 차이검증에서는 여학생(M=2.83)이 남학생(M=2.16)보다 능동적 양식을 더 높게 인지하고 있는 것으로 나타났다(t=-2.313, p=.023). 회귀분석 결과에서는 정적정서가 능동적 양식(t=2.984, p=.004).과 지지추구 양식(t=3.055, p=.003)에 영향을 미치는 것으로 나타났다. 이러한 결과들을 토대로 이 연구의 제한점 및 후속연구 등을 논의하였다. 후속연구에서는 초등학교 고학년 학생과 고등학생까지 포함하여 연구대상의 대표성을 높여야 할 것이며, 또한 중소도시의 연구대상과의 비교연구가 필요할 것이다. 연구 방법적 측면에서도 보다 정확한 정보를 수집하기 위하여 면접이나 부모와 담임교사의 평정 등의 자료를 수집하여 학생들의 자료를 보완할 필요가 있다. 또한, 정서관련 척도의 경우 우리 문화특성이 적합하게 반영되는 한편 다른 요인에 의해 오염되지 않고 측정할 수 있는 정서 척도의 개발이 필요하다. Based on the rationale and previous studies, this study analyzes how emotional characteristics affect emotional control form. Using the Positive Affect and Negative Affect Scale; PANAS; Active style Scale, Avoidant / Distractive style Scale and Support-pursuing style Scale, 112 students from a small rural school were surveyed. 111 students were selected as valid samples while 1 student whose response was not countable was excluded. Statistical analysis, cronbach’s α, correlation analysis, latent means analysis and multiple regression analysis were performed using SPSS 19.0. The results of the study were as follows: As a result of correlation analysis, positive affect showed a positive correlation(+) with active style(.283) and supportive-pursuing style(.284). On the other hand, negative affect showed a positive correlation(+) with avoidant-distractive style(.263). As for the gender differences, female students(M=2.83) showed better awareness of active style than male students(M=2.16, t=-2.313, p=.023). In the regression analysis, positive emotion showed affection to active style(t=2.984, p=.004) and supportive-pursuing style(t=3.055, p=.003). Based on these results, we discussed the limitations of this study and made suggestions regarding the follow-up study.

Rapid Upregulation of Dehyrin3 and Dehydrin4 in Response to Dehydration Is a Characteristic of Drought-Tolerant Genotypes in Barley

( So Yon Park ),( Kyu Jin Noh ),( Jeong Hoon Yoo ),( Jae Woong Yu ),( Byun Woo Lee ),( Jung Gon Kim ),( Hak Soo Seo ),( Nam Chon Paek ) 한국식물학회 2006 Journal of Plant Biology Vol.49 No.6

Growth Period Effects on the Protective Properties of Aloe vera Against t-BHP-Induced Oxidative Stress in Chang Cells

( Jin Woo Hwang ),( Eun Kyung Kim ),( Yon Suk Kim ),( Jae Woong Lee ),( Jeong Jun Lee ),( Han Jong Pyo ),( Sang Ho Moon ),( Byong Tae Jeon ),( Pyo Jam Park ) 한국미생물 · 생명공학회 2015 Journal of microbiology and biotechnology Vol.25 No.12

Aloe vera has been used in traditional medicine for the therapy of a variety of disorders, such as wounds and burns. However, few studies have examined the antioxidant capacities of A. vera plants during different growth periods. In order to investigate the effects of growth on antioxidant activity, A. vera was prepared from 2-, 4-, 6-, 8-, and 12-month-old aloe. The extracts from 6-month-old A. vera showed the highest contents of flavonoids (9.750 mg catechin equivalent/g extract) and polyphenols (23.375 mg gallic acid equivalent/g extract) and the highest ferric reducing antioxidant power (0.047 mM ferrous sulfate equivalent/mg extract). The extract from 6-month-old A. vera exhibited the highest free radical scavenging potential, and the lowest IC50 values were found for 2,2-diphenyl-1-picrylhydrazyl (0.26 mg/ml) and alkyl radicals (0.50 mg/ml). In addition, the extract from 6-month-old A. vera showed the greatest effects on cell viability in normal liver cells. Based on these findings, the extract from 6-month-old A. vera was examined further in order to determine its protective potential against tert-butyl hydroperoxide (t-BHP)-induced oxidative stress. The extract from 6-monthold A. vera at a concentration of 0.25 mg/ml showed the highest protective activity against t-BHP-induced reactive oxygen species production. These findings suggested that harvesting regimens were critical in the regulation of effects of the bioactive potential of A. vera on antioxidant activity.

n-butanol Fraction of Uncaria rhynchophylla Induces Apoptosis in Human Hepatoma Cancer Cells through Activation of PARP

Kim, Yon-Suk,Hwang, Jin-Woo,Kwon, Hyuck-Ju,Lee, Won-Young,Song, Hyuk,Jeong, Jae-Hyun,Sung, Si-Heung,Moon, Sang-Ho,Jeon, Byong-Tae,Park, Pyo-Jam 한국생물공학회 2014 Biotechnology and Bioprocess Engineering Vol.19 No.3

The ability of water and ethanolic extracts isolated of Uncaria rhynchophylla (UR) to function as an anticancer agents was studied using HepG2 cells. The ethanolic UR extract was further fractionatedwith hexane, chloroform (CHCl3), ethyl acetate (EtOAc), n-butanol (n-BuOH), and water, and these fractions were subsequently investigated for anticancer activity. Among the fractions, the n-BuOH fraction induced apoptosis in a dose- and time-dependent manner, when determined by cell cycle analysis, Annexin V-FITC/PI double staining, and Hoechst 33342 staining. Moreover, the n-BuOH fraction induced apoptotic cell death by modulating the expression of caspase-7, caspase-8, and poly ADP ribose polymerase (PARP). These results indicated that the n-BuOH fraction from UR has strong anticancer activity in HepG2 cells and causes an upregulation of apoptotic proteins through the activation of PARP.

위성 DMB 수신 단말기용 ‘ㄷ’형 마이크로스트립 안테나 설계

장연정(Yon-Jeong Jang),우종명(Jong-Myung Woo) 한국통신학회 2006 한국통신학회 학술대회논문집 Vol.2006 No.7

The differential effects of anemia on mortality in young and elderly end-stage renal disease patients

( Eun Jeong Ko ),( Yong Kyun Kim ),( Jang-hee Cho ),( Yon Su Kim ),( Shin-wook Kang ),( Nam-ho Kim ),( Yong-lim Kim ),( Chul Woo Yang ),( Byung Ha Chung ) 대한신장학회 2020 Kidney Research and Clinical Practice Vol.39 No.2

Background: The aim of this study was to compare the effect of anemia on clinical outcomes according to age in patients with end-stage renal disease (ESRD). Methods: A total of 3,409 patients from the Clinical Research Center for ESRD were included and divided into three groups by age: age < 40 (n = 488), 40 ≤ age < 60 (n = 1,650), and age ≥ 60 (n = 1,271). We compared overall and cardiovascular mortality, and all-cause and cardiovascular hospitalization according to mean hemoglobin (Hb) concentration. Results: Among participants ≥ 60 years of age, the Hb < 10 g/dL group had greater all-cause mortality (adjusted hazard ratio [HR], 2.098; 95% confidence interval [CI], 1.567-2.808; P < 0.001) than the 10 ≤ Hb < 12 g/dL group, whereas among participants < 40 years of age, the Hb ≥ 12 g/dL group had greater mortality than the 10 ≤ Hb < 12 g/dL group. Moreover, in participants ≥ 60 years of age, the HR for all-cause hospitalization for the Hb < 10 g/dL group was significantly greater than that of the 10 ≤ Hb < 12 g/dL group (HR, 1.472; 95% CI, 1.057-2.051; P = 0.022), whereas it was significantly lower in the Hb ≥ 12 g/dL group (HR, 0.544; 95% CI, 0.362-0.820; P = 0.004) However, among participants < 40 years of age, the incidence of all-cause hospitalization did not differ according to the Hb concentration (HR, 1.273; 95% CI, 0.814-1.991; P = 0.290 for the Hb < 10 g/dL group; reference, 10 ≤ Hb < 12 g/dL; HR, 0.787; 95% CI, 0.439-1.410; P = 0.265 for Hb ≥ 12 g/dL group). Conclusion: The impact of anemia on mortality was more significant in elderly ESRD patients. Strict monitoring and management of anemia should be required for elderly ESRD patients.