신장기능영상용 방사성의약품 Bz - MAG3 ( Benzoylmercaptoacetylglycylglycylglycine ) 의 키트화 및 체내분포

고창순(Chang Soon Koh),이명철(Myung Chul Lee),정준기(June Key Chung),이동수(Dong Soo Lee),김영주(Young Ju Kim),정재민(Jae Min Jeong),장영수(Young Soo Chang),조정혁(Jung Hyuk Cho) 대한핵의학회 1996 핵의학 분자영상 Vol.30 No.3

N/A The MAG3 is a tubular excreting radiopharmaceutical for renal image. We synthe-sized benzoyl MAG3 (Bz-MAG3) and made a kit for labeling with Tc-99m. We checked the labeling effeciency of Tc-99m labeled MAG3 and biodistribution. Labeling efficiency was checked by TLC- SG (acetonitrile/H2O=2/1). After injecting of 1 mCi of Tc-99M-MAG3 to ICR-mice, Tmax(min), T1/2(min) were obtained in the renogram. Sequencial images (30sec, 2min, 5min, 10min, 15min, 20min) of TC-99m-MAG3 were compared with those of commercial Tc-99m-DTPA (Du Pont Merck Pharmaceutical Co.) kit. 1) The Rf value of synthesized Tc-99m-MAG3 was 0.78 and labeling efficiency was 97.5±1.9% (n=10). 2) The dynamic images of the Tc-99m-MAG3 were better than those of the Tc-99m-DTPA. 3) The Tmax(min.) and T1/2(min.) of Tc-99m-MAG3 (n=10) were 1.5±0.5 (left), 1.4±0.4(right), and 4.3±1.4 (left), 4.8±2.0 (right), respectivel. The Tmax(min.) and T1/2(min.) of Tc-99m-DTPA (n=7) were 2.7±1.6 (left), 2.7±1.6 right), and 3.8±1.7 (left), 4.5±2.7 (right), respectively. The quaility of image and labeling efficiency of the synthesized Bz-MAG3 kit were excellent, that it was supposed to be used in routine clinical work.

정안침요법(整顔鍼療法)을 응용하여 호전된 후천성 사경환자 치험 2례

박서영,김재수,홍의재,이윤경,이봉효,임성철,정태영,이경민,Park, Seo-Young,Kim, Jae-Su,Hong, Eui-Jae,Lee, Yoon-Kyoung,Lee, Bong-Hyo,Lim, Seong-Chul,Jung, Tae-Young,Lee, Kyung-Min 대한침구의학회 2008 대한침구의학회지 Vol.25 No.4

Objectives : This report intended to estimate effects of Jung-an acupuncture on the acquired torticollis caused by muscle contraction. Methods : The patients were treated by Jung-an acupuncture, herb medication and Physical treatment daily. The improvement of the patients was judged by Toronto Western Spasmodic Torticollis Rating Scale(TWSTRS), Tsui's score and Visual Analogue Scale(VAS). Results : After 7 days of treatment, the 2 patients' neck pain and cervical movement were improved. Also, TWSTRS score, Tsui's score and VAS were all reduced. Conclusions : As the Jung-an acupuncture's theological base is organized with meridian theory and myofacial release therapy, We considered the Jung-an acupuncture is effective not only for the skin disease but also for the muscle problem such as torticollis.

김치유래 젖산균의 균체지방산 분석을 이용한 분류학적 연구

이정숙,정민철,김우식,이근철,김홍중,박찬선,이헌주,주윤정,이근종,안종석,박완,박용하,민태익 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.2

표준균주를 포함한 230여개의 김치유래 젖산균에 대한 균체지방산(FAMEs)을 분석하였다. FAMEs profiles는 Euclidian Distance 17.5에 의해 7개의 Major Cluster와 1개의 Single Cluster로 나뉘어졌다. 이중 A, B, C 및 Cluster는 Leuconostoc속으로 분석되어졌고, F는 Lactobacillus속으로 분석되어졌다. 그리고 E와 G cluster는 두개의 Genus가 혼재되어 나타났으며 보충적인 연구가 필요하다. 앞으로 김치유래 젖산균의 균체지방산 분석결과를 기반으로 한 데이타베이스에 95가지 탄소원을 이용하는 수치분류학적 접근방법 및 Pyrolysis Mass Spectrometry 등의 화학적 분석 방법과 분자친화적 연구를 통한 종합적 분류정보 체계가 갖추어지면 젖산균의 신속, 정확한 동정 및 연구에 활발히 이용되어질 것이다. Two hundreds and thirty lactic acid bacteria, mostly isolated from Kimchi, including type strains were sued for analysis of cellular fatty acids. The 230 test strains were recoverd in 7 major and 1 single clusters defined a Euclidian distance of 17.5. These aggregate taxa were equivalent to the genus Leuconostoc (aggregate group A, B, C and D), and the genera Leuconostoc and Lactobacillus (aggregate group G). It is concluded as evident that FAMEs (Fatty Acid Methyl Esters) profile of cell can be used as a criterion in classification of lactic acid bacterial from kimchi. Additional comparative taxonomic studies need to be carried out on well chosen representative strains to determine the most appropriate methods of value.

정신분열병에 대한 리스페리돈의 효과 및 안정성

이민수,김용구,김영훈,연병길,오병훈,윤도준,윤진상,이철,정희연,강병조,김광수,김동언,김명정,김상훈,김희철,나철,노승호,민경준,박기창,박두병,백기청,백인호,손봉기,손진욱,양병환,양창국,우행원,이정호,이종범,이홍식,임기영,전태연,정영조,정영철,정인과,정인원,지익성,채정호,한상익,한선호,한진희,서광윤 大韓神經精神醫學會 1998 신경정신의학 Vol.37 No.1

연구목적 : 본 시험의 목적은 임상시험 시작전에 연구자들을 대상으로 PANSS Workshop을 통하여 PANSS, ESRS에 대한 국내에서의 표준화 작업을 구축하고 새로운 정신병 치료제인 리스페리돈의 효과와 안정성을 재확인하여 리스페리돈 사용에 대한 적정화를 이루는데 있다. 연구방법 : 1996년 4월부터 1996년 9월까지 국내 39개 대학병원 정신과에 입원중인 혹은 증상이 악화되어 입원하는 정신분열병 환자 377명을 대상으로 다시설 개방 연구를 시행하였다. 1주일간의 약물 배설기간을 가진후, 리스페리돈을 8주간 투여하였고, 기준점, 1주, 2주, 4주, 그리고 8주후에 평가되었다. 용량은 제1일에는 리스페리돈 1mg씩 1일 2회, 제2일에는 2mg씩 1일 2회, 제3∼7일에는 3mg씩 1일 2회 투여하였다. 이후 환자의 임상상태에 따라 임의로 증량할 수 있으며, 최대 일일 16mg을 초과하지 않도록 하였다. 추체외로 증상을 조절하기 위한 투약을 허용하였다. 임상증상 및 부작용의 평가는 PANSS(Positive and Negative Syndrome Scale), CGI(Clinical Global Impression) 그리고 ESRS(Extrapyramidal Symptom Rating Scale)을 사용하였다. 연구결과 : 377명중 343명(91%)이 8주간의 연구를 완결하였다. 치료 종결시점인 8주후 PANSS 총점수가 20% 이상 호전된 경우를 약물 반응군으로 정의할때, 약물반응군은 81.3%였다. 리스페리돈에 반응하는 예측인자로는 발병연령, 이전의 입원 횟수, 유병기간이 관련 있었다. 리스페리돈은 1주후부터 PANSS양성, 음성, 및 일반정신병리 점수상에 유의한 호전을 보여 효과가 빨랐다. CGI의 경우도 기준점에 비해 1주후부터 유의한 감소를 나타내었다. ESRS의 경우, 파킨슨 평가점수는 기준점과 비교해 투여 1주, 2주, 4주후 유의하게 증가되었다가 8주후 기준점과 차이가 없었다. Dystonia 평가점수는 1주후만 유의한 증가를 보였으며, dyskinesia 평가점수는 유의한 차이가 없었다. 혈압, 맥박수의 생명징후 및 일반 혈액학 검사, 생화학적 검사, 심전도 검사에서 유의한 변화는 없었다. 결 론 : 이상의 다시설 개방 임상 연구를 통해 리스페리돈은 정신분열병 환자에서 양성증상뿐만 아니라 음성증상 및 전반적인 증상에도 효과적인 것으로 사료된다. 보다 명확한 평가를 위해서는 다른 항정신병약물과의 이중맹검 연구가 필요할 것으로 생각되며, 또한 장기적 치료에 대한 평가도 함께 이루어져야 하겠다. Objective : The purpose of this study was to investigate the efficacy and safety of risperidone in the treatment of Korean schizophrenic patients. Method : This multicenter open study included 377 schizophrenic patients drawn from 39 university hospitals. After a wash-out period of 1 week, the schizophrenic patients were treated with risperidone for 8 weeks and evaluated at 5 points ; at baseline, and 1, 2, 4 and 8 weeks of treatment. The dose was increased from 2mg/day(1mg twice daily) to 6mg/day(3mg twice daily) during the first week and adjusted to a maximum of 16mg/day over the next 7 weeks according to the patient's clinical response. Medication to control extrapyramidal symptoms was permitted. The psychiatric and neurological status of the patients was assessed by PANSS, CGI, and ESRS scales. Results : 343(91%) of 377 patients completed the 8-week trial period. Clinical improvement, as defined by a 20% or more reduction in total PANSS score at end point, was shown by 81.3% of patients. The predictors of response to risperidone were associated older age, shorter duration of illness, fewer previous hospitalization. Risperidone had rapid onset of action ; a significant decrease of the total PANSS and three PANSS factor(positive, negative, general), and CGI was already noticed at the end of first week. For the ESRS, parkinsonism rating scores were significantly increased until week 4 comparing with baseline. Dystonia rating scores were significantly increased until week 1, and dyskinesia rating scores were not significantly changed during the study. Laboratory parameters including vital sign, EKG, hematological, and biochemical values showed no significant changes during the trial. Conclusions : This study suggests that risperidone is generally safe and effective against both the positive and negative symptoms in our group of patients.

주요우울증에 대한 벤라팍신의 효과 및 안전성

이민수,남종원,강성민,연병길,오병훈,이철,정인과,채정민,백인호 대한신경정신의학회 2000 신경정신의학 Vol.39 No.6

연구목적 : 주요우울증 환자에서 벤라팍신의 치료 효과와 안정성을 조사하기 위해 다기관 개방연구를 시행하였다. 방 법 : DSM-IV 진단 기준에 의거하여 주요우울증으로 진단된 환자중 벤라팍신 투여에 동의한 환자를 대상으로 하였다. 선택된 환자에서 다른 항우울제를 복용하고 있는 경우 14일 이상의 약물 배설기간을 가진후 벤라팍신을 6주간 투여하였으며, 기준점, 1주, 2주, 4주, 6주 후에 HAM-D, MADRS, 그리고 CGI등을 사용하여 평가하였다. 본 연구기간중 발생된 모든 부작용은 부작용의 발생 및 소설 시기, 심한 정도, 발생 빈도, 벤라팍신과의 관련성, 관련 조치 및 결과에 대하여 증례기록서에 기록하도록 하였다. 결 과 : 총 141명을 대상으로 하였으며, 이중 94명(66.7%)이 6주간의 연구를 완결하였고, 47명(33.3%)이 중도탈락하였다. HAM-D총점수는 벤라팍신 투여 1주후부터 유의한 감소를 나타내었으며, 2주,4주, 6주후에도 지속적인 감소를 보였다. MADRS의 총점수도벤라팍신 투여 1주 후부터 유의한 호전을 나타내었으며, 2주, 4주, 6주 후에도 지속적인 감소를 보였다. CGI에서도 기준점, 1주, 2주, 4주, 6주 후 각각의 시점 사이에 유의한 호전이 보였다. 활력징후, 일반 혈액학, 생화학, 심전도 검사 등에서 유의한 변화는 없었다. 벤라팍신과 관련된 부작용으로 흔히 보고한 증상은 오심(10.6%), 소화불량(9.5%), 변비(8.5%), 현기증(8.5%)등 이었다. 결 론 : 다기관 개방연구를 통해 주요우울증 환자에 대한 벤라팍신의 투여는 우울증상의 호전에 효과적이었으며 안전하였다. Objective : A Multicenter open-label study was conducted to evaluate the clinical efficacy and safety of venlafaxine for the tretment in patients with major depression. Method : The study was done in patients with major depression diagnosed by DSM-IV who accepted venlafaxine medication. In cases of the patients taking other antidepressants, 6 weeks of venlafaxine medication was carried out after 14 days of drug excretion period and evaluation using HAM-D, MADRS, and CGI was done at baseline, and after 1, 2, 4, and 6 weeks. Regarding all side effects that had occurred during the period of our study such as their developed/disappeared time, severities, incidences, relationship with venlafaxine, managements and results have been putted into the records. Results : A total of 141 patients were enrolled. Among 94 of them finished the 6 weeks of research and 41 of them did not make it through the research. Total HAM-D scores showed significant decrease after 1 week of venlafzxine medication and continous decrease through the study period. Total scores of MADRS also showed significant improvement after 1 week and continuous decrease through the study period. Similarly, CGI showed significant improvement between baseline, 1, 2, 4, and 6 weeks. There were no significant changes in vital sign, CBC, chemistry, and EKG. The commonly reported side effects of venlafaxine were nausea(10.6%), indigestion(9.5%), constipation(8.5%), and dizziness(8.5%). Conclusion : According to the results, venlafaxine was effective and safe in the treatment of patients with major depression.

12주간의 태권도 트레이닝이 남자 청소년의 골밀도 및 골 건강관련 호르몬에 미치는 영향

김민형 ( Min Hyung Kim ),정현철 ( Hyun Chul Jung ),강효정 ( Hyo Jung Kang ),김현배 ( Hyun Bae Kim ),송종국 ( Jong Kook Song ) 한국스포츠정책과학원(구 한국스포츠개발원) 2012 체육과학연구 Vol.23 No.4

The purpose of the study was to evaluate the effects of weeks taekwondo training on bone mineral density, and calcemic hormones in male adolescents. 19 male adolescents aged 13-14 years (12 for training group; 7 for control group) were participated in this study. Taekwondo group has been performed 50 minutes a days a week for 12 weeks, as exercise intensity of 60-70 % HRR (heart rate reserver). Control group have only performed the activities included in their physical education classes. Skeletal maturity was assessed by TW3. Bone mineral density at the sites of lumber spine, forearm, femur and whole body were assessed by DXA (Hologic. QDR-4500, USA). Blood samples were drown in the morning after 12-h fast and spun at 3000 rpm for 15 min. 25(OH)D and calcitonin were analyzed by Liaison (Diasorin, USA). Osteocalcin was analyzed by COBAR 5010 (Quantum Packard. USA). Parathyroid hormone was analyzed by E170 (Roche, Germany) and growth hormone was analyzed by Immulite 2000 (DPC, USA). Statical analyses were done with SAS version 9.2. All data were presented in terms of means and standard deviations. Two-wany ANOVA with repeated measure was used for interaction of time x group. Paired t-test was perfomed to change over time in each parameter. Multiple regression analysis was used to find factors that influence dependent variables. A statistically significant level was defined as 95%. The results of this study indicates that bone age for TG (14.9±0.62yr) was significantly advanced compared to chronological age (14.0±0.64yr). but CG had similar bone age (14.1±0.55yr) compared to chronological age (13.9±0.46yr). significant within subjects effects were found for whole body BMD(p<.001), lumbar BMD (p<.001) and forearm BMD (p<.0001). Significant increase could be obtained in TG for whole body BMD, lumbar BMD, and forearm BMD between pre and post-tests However, there was no difference for femoral BMD for both TG and CG. Although no difference was found for serum osteocalcin in CG, significant increase could be observed in TG between pre and post-tests. There was significant within subject effect for PTH in TG (p<.05). Significant interaction effect of group and time was found for GH (p<.0001). serum 25 (OH)D was significantly decreased in both groups throughout the study periods. Bone age, serum calcitonin and lean tissue were predictors for whole body BDM in explaining 51.0%, 64% and 74.0% respective in TG. Bone age was significant predictor for lumbar BMD in explaining 39.0% in TG. In conclusion, 12 weeks taekwondo training has positive effects on bone mineral density and calcemic hormones in male adolescents. Further study is needed to enhance femral BMD as taekwondo training over 12 weeks and higher intensity. 이 연구의 목적은 12주간의 태권도 트레이닝이 남자 청소년의 골밀도와 골 건강관련 호르몬에 미치는 영향을 규명하는 것이었다. 연구대상자는 13~14세 남자 청소년 19명이었으며, 이들을 훈련군(12명)과 통제군(7명)으로 분류하였다. 골격성숙도는 TW3 방법을 적용하여 RUS 점수와 뼈나이를 평가하였고, 골밀도는 DXA를 이용하여 측정하였다. 골 건강관련 호르몬은 osteocalcin(OC), calcitonin(CC), parathyroid hormone(PTH), growth hormone(GH)과 25-hydroxyvitamin D(25(OH)D)를 분석하였다. 그룹 간 태권도 트레이닝 전·후 종속변인의 차이를 규명하기 위해 반복 이원분산분석을 적용하였고, 그룹 내 차이는 대응 t-검정을 이용하여 분석하였다. 골밀도와 뼈나이, 체중, 신장, 골 건강관련 호르몬의 관계를 규명하기 위해 다중회귀분석을 적용하였다. 이 연구 결과 훈련군의 전신 골밀도(p<.001), 요추 골밀도(p<.001), 전완 골밀도(p<.01)는 12주 태권도 트레이닝 전·후 통계적으로 유의하게 증가하였으나 통제군은 유의한 변화가 없었다. 한편 대퇴 골밀도는 훈련군과 통제군 모두 12주 트레이닝 전·후 유의한 변화가 나타나지 않았다. OC는 훈련군(pre: 13.18ng/mL, post: 40.38ng/mL)과 통제군(pre: 13.04ng/mL, post: 40.89ng/mL) 모두 통계적으로 유의하게 증가한 반면, CC는 두 그룹 모두 유의한 변화가 없었다. PTH는 훈련군의 경우 통계적으로 유의하게 감소하였지만(p<.05), 통제군은 유의한 차이를 보이지 않았다. GH는 트레이닝 전·후 훈련군과 통제군에서 유의한 상호작용효과가 나타났으며(p<.05), 훈련군(pre: 0.70ng/mL, post: 4.22ng/mL)에서는 증가한 반면 통제군(pre: 5.40ng/mL, post: 2.04ng/mL)에서는 감소하였다. 25(OH)D는 훈련군과 통제군 모두 통계적으로 유의하게 감소하였다. 골밀도의 예측변인을 분석한 결과 훈련군에서 전신 골밀도의 경우 뼈나이, 제지방조직, 신장이 높은 설명력을 보였고, 요추 골밀도의 경우 뼈나이, 전완 골밀도의 뼈나이, PTH, 생활나이가 유의한 설명력을 나타냈다. 결론적으로 12주간의 태권도 트레이닝은 남자 청소년들의 골밀도와 골 건강관련 호르몬에 긍정적인 영향을 미친 것으로 나타났으며 태권도 트레이닝이 청소년들의 요추 골밀도에 영향을 미치기 위해서는 12주 이상의 장기간의 훈련을 통한 후속연구가 필요할 것으로 사료된다.

식품중 중금속 규격 과학화를 위한 조사연구(Ⅲ) : 음료수의 중금속 향량에 대하여 Heavy metal contents beverages

김명철,김미혜,권기성,정소영,박성국,이윤동,이승훈,김은정,강민철,박효정 식품의약품안전청 2001 식품의약품안전청 연보 Vol.5 No.-

본 연구는 국내에 유통되고 있는 음료류중 중금속 함량을 파악하여 식품공전 제 ·개정시 과학적 기초자료로 활용하고자 수행하였다. 출 2☞7여건의 음료류에 대하여 유도결합플라스마 분광기(ICP), 원자홉광광도 계(AAS) 및 수은분석기 등을 치용하여 납, 카드윰 등 중금속함량을 측정하였으며 그 결과는 다음과 같다 [단위 : min-ma)t(irran) ; mrk3 ; f : 0.0001-0.0025(0.0003), As :불검출곰.OB45(0.0003), Pb : 불검출-0.0893(0.0041),Cd ' 불검출곤.0064(0.0011), Cfl : 불검출.(i9(0.05), Mn : 불검출글.찌(0.16), Zn : 불검출-12.85(0.뽀), Sn :불검출-45.36(1.97). 본 조사결과 우리나라에서 유통되고 있는 음료류 중 납 등 중금속 함량은 외국의 모니터랑 결과와 유사하였다. 또한 우리나라 국민이 음료류를 통한 중금속 섭취량은 FAO/UTfO에서 설정한 잠 정주간섭취처용량의 약 0.OleO.06% 이하로 매우 낮았다. 편 연구조사에서 먼어진 결과는 음료류 중 납 기준 설정을 위한 중요한 기초자료로 활용할 수 있는 것으로 사료된다. This study was conducted to estimate the cantents of heavy netals in beverages and to fIFovide a scientific basis for heav)· meta3 standardizatior of Korea Food Code. The contents of rriercur17(Hg), lead(Pb), cadmium(Cd), arsenic(As), manganese(Mn),ziac(Zn), tin(Sn) and topper(Cu) were determined in a total of 20? samples of beverages usinga mercury anal!'zer, aromic absorption spectrophotometer(AAS) and inductiuety coupled plasmaspectrometer(fcpl. The vatues of heavy metals In beverages were as fellows (min-max (mean) , mg/krl , Hg : 0.DOOI-0.0095(0.0004), As : ND-0.0245(0.0003), Pb ND-0.0893(0.0041), Cd : ND-0.0064(0.0011),Cu : ND-1.69(0.03), Mn : ND-3.94(0.16), Zn ND-12.85(0.28), Sn : ND-45.36(1,97). Our results weresimilar to thofe reported by other countries. It is thought that our results could be utilizedimportant references toT es?ablish the standard of lead in beverages.

고등어(Scomber japonicus ) 치어의 마취제로서 Clove oil, MS-222 및 2-Phenoxyethanol의 평가

한석중 ( Seock Jung Han ),김경민 ( Kyong Min Kim ),최낙중 ( Nack Jung Choi ),구준호 ( Jun Ho Koo ),박충국 ( Chung Kug Park ),이원교 ( Won Gyo Lee ),지승철 ( Seung Chul Ji ) 한국수산과학회(구 한국수산학회) 2011 한국수산과학회지 Vol.44 No.6

The efficiency of clove oil, MS-222, and 2-phenoxyethanol was evaluated as anesthetics in juvenile Scomber japonicus . Stage A5 of anesthesia was assumed to be sufficient for conducting routine aquaculture procedures in less than 3 min, with recovery (stage R5) in less than 5 min. The lowest effective doses of the three anesthetics were 50 mg L-1 clove oil (anesthetic time of 71.3 s and recovery time of 167.0 s), 100 mg L-1 MS-222 (anesthetic time of 70.7 s and recovery time of 115.7 s), and 400 mg L-1 2-phenoxyethanol (anesthetic time of 86.7 s and recovery time of 95.0 s). Anesthetic times decreased with increasing doses for all three anesthetic agents, and fish anesthetized with clove oil exhibited the longest recovery times. After 30 min, the highest plasma cortisol and lactate levels were detected with the use of clove oil, whereas the lowest values were observed with 2-phenoxyethanol. In addition, high glucose levels were maintained during recovery with clove oil, but the treatments did not significantly differ. The most effective of the three anesthetic agents was 2-phenoxyethanol, although all were considered acceptable for use in cultures of juvenile Scomber japonicus

Involvement of calcium-mediated apoptotic signals in H₂O₂-induced MIN6N8a cell death

Choi, Sung-E,Min, Se-Hee,Shin, Ha-Chul,Kim, Hyo-Eun,Jung, Min Whan,Kang, Yup Elsevier 2006 european journal of pharmacology Vol.547 No.1

<P><B>Abstract</B></P><P>Reactive oxygen species are believed to be the central mediators of beta-cell destruction that leads to type 1 and 2 diabetes, and calcium has been reported to be an important mediator of beta cell death. In the present study, the authors investigated whether Ca<SUP>2+</SUP> plays a role in hydrogen peroxide (H<SUB>2</SUB>O<SUB>2</SUB>)-induced MIN6N8a mouse beta cell death. Treatment with low concentration H<SUB>2</SUB>O<SUB>2</SUB> (50?μM) was found to be sufficient to reduce MIN6N8a cell viability by 55%, largely via apoptosis. However, this H<SUB>2</SUB>O<SUB>2</SUB>-induced cell death was near completely blocked by pretreatment with BAPTA/AM (5?μM), a chelator of intracellular Ca<SUP>2+</SUP>. Moreover, the intracellular calcium store channel blockers, such as, xestospongin c and ryanodine, significant protected cells from 50?μM H<SUB>2</SUB>O<SUB>2</SUB>-induced cell death and under extracellular Ca<SUP>2+</SUP>-free conditions, 50?μM H<SUB>2</SUB>O<SUB>2</SUB> elicited transient [Ca<SUP>2+</SUP>]<SUB>i</SUB> increases. In addition, pharmacologic inhibitors of calpain, calcineurin, and calcium/calmodulin-dependent protein kinase II were found to have a protective effect on H<SUB>2</SUB>O<SUB>2</SUB>-induced death. Moreover, H<SUB>2</SUB>O<SUB>2</SUB>-induced apoptotic signals, such as c-JUN N-terminal kinase activation, cytochrome <I>c</I> release, caspase 3 activation, and poly (ADP-ribose) polymerase cleavage were all down-regulated by the intracellular Ca<SUP>2+</SUP> chelation. These findings show that [Ca<SUP>2+</SUP>]<SUB>i</SUB> elevation, possibly due to release from intracellular calcium stores and the subsequent activation of Ca<SUP>2+</SUP>-mediated apoptotic signals, critically mediates low concentration H<SUB>2</SUB>O<SUB>2</SUB>-induced MIN6N8a cell death. These findings suggest that a breakdown of calcium homeostasis by low level of reactive oxygen species may be involved in beta cell destruction during diabetes development.</P>

간헐식 흐름방식을 활용한 수직 · 수평 습지의 정화효율 평가

주광진(Kwang Jin Joo),이동민(Dong Min Lee),김기중(Ki Jung Kim),조용철(Yong Chul Cho),장광현(Gwang Hyeon Jang),최이송(I Song Choi),오종민(Jong Min Oh) 응용생태공학회 2017 Ecology and resilient infrastructure Vol.4 No.3

본 연구에서는 부영양화의 원인이 되는 질소와 인의 제거 효율을 향상시킬 목적으로 광물질을 활용한 여재를 이용하여 호기, 혐기의 흐름조건을 만들어주기 위한 수직·수평 흐름 인공습지를 고안하여 아크릴 반응조로 제작한 후 성능평가를 진행하였다. 수직·수평 흐름형 인공습지의 경우 호기 및 혐기조건을 평가하기 위해서 반응조 내 용존산소(DO) 농도를 측정해본 결과 호기상태에서는 2.7 ㎎/L, 혐기상태에서는 N.D로 확인되어 목적에 부합된 결과가 확인되었다. 실험결과에서는 SS 저감효과가 140 min, 80 min, 60 min의 운전시간에서 각각 94%, 91%, 61%의 효율을 보였고, T-P의 경우 각각의 운전시간에 따라 84%, 71%, 63%의 저감효율을 보였다. 또한 T-N의 경우 각각의 운전시간에 따라 63%, 49%, 42%의 저감효율을 보여 기존의 습지가 12~24 hr 체류시간을 가지는 것에 비하여 짧은 운전시간에도 높은 처리효율을 보이는 것으로 확인되었다. 본 연구에서는 수직·수평 흐름 방식을 복합 적용하여 기존 인공습지의 단점을 보완하기 위해 기술개발을 진행한 것으로 어떠한 기능적 효과를 갖는지 확인하였고, 향후 이에 대한 현장적용을 위한 운영 및 관리적 차원의 메커니즘 연구가 추가로 진행 될 필요가 있다. Nitrogen and phosphorus are key factors in causing eutrophication of water body. In this study, ceramics media was selected to increase the removal efficiency of nitrogen and phosphorus. We designed vertical, horizontal flow constructed wetlands to create aerobic and anaerobic flow conditions by using the media, then proceeded to performance evaluations after acrylic reactors were produced. In the case of vertical and horizontal flow constructed wetlands, we measured oxygen concentrations to evaluate aerobic and anaerobic conditions. we got the result of 2.7 ㎎/L in the aerobic condition, N.D in the anaerobic condition respectively, which suited our purpose. The result of the combined vertical and horizontal flow condition showed that the removal efficiency of SS was 94%, 91%, 61% at 140 min, 80 min, 60 min of running times, respectively, and the removal efficiency of T-P was 84%, 71%, 63% during each running time. In case of T-N, the removal efficiency was 63%, 49%, 42% during each running time. We found that the reactor exerted better removal efficiency when in the short time compared to 12 - 24 hr residence time of existing wetlands. In this study, we conducted experiments to explore functional effects after applying combined vertical and horizontal flow methods in the field. Further study will be carried out to identify its mechanism and administrative perspective.