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fac-Tris(L-serinato)chromium(Ⅲ) 화합물의 분광학적 연구 및 리간드장 분석
최영근,서정선,이규왕 명지대학교 자연과학연구소 1995 자연과학논문집 Vol.12 No.-
중심금속chromium(III)와 리간드인.amino acid(L-serine)[serine=HOCH₂CH(NH₂)CO₂H]사이의 결합의 특성을 파악하기 위하여 저온(13K)에서의 luminescence 스펙트럼과 excitation 스펙트럼을 측정하였다.Tris (L-serinato)chromium(III)착화합물은 산소 원자 3개와 질소원자 3개로 이루어진 facial 형태의 geometry를 가진 착화합물이다.Amino acid 를 리간드로 가진 다른 착화합물과는 달리, serine 착화합물은 β탄소위치에 hydroxy group이 치환되어 있어서 electronic effect 와 steric dffect의 효과를 기대할 수 있다. 산소원자의 π비등방성 결합을 포함한 ligand field analysis로 부터, serine 착화합물의 자세한 electronic structure와 결합특성을 살펴보기로 하겠다. Low temperature (13K)luminescence and excitation spectra were measured to anlayze the bonding characteristics between Cr(III)and amino acid(L-serne) ligand. Tris(L-serinato)chromium(III) complex has three oxygen and three nitrogen ligand atoms in facial geometry. Unlike oter complexes with amino acids, additional hydroxyl group in β-carbon tom is expected to have electronic an steric effects. From the ligand field analysis including anisotropic πbonding on oxygen atom, we found that both oxygen and nitrogen atom is weak σdonor. The splitting of electronic lines and bonding characteristics in the title compound are explained by considering the geometric effect, especially anisotropic πbonding.
정신분열병에 대한 Risperidone의 효과 및 안전성에 관하여
신석철,왕성근,지익성,이선우,이규광,이봉희,이진영,황선희,신용재,배경도,김정란 충남대학교 의과대학 지역사회의학연구소 1997 충남의대잡지 Vol.24 No.1
In order to evaluate the efficacy and safety of risperidone, 10 patients with chronic schizophrenia were examined for 8 weeks in a silgle-open study. After the wash-out period of 1 week, risperidone was administered. Efficacy was evaluated by means of Positive and Negative syndrome Scale for Schizophernia(PANSS) and Clinical Global Impression(CGI). Safety assessment included the Extrapyramidal Symptom Rating Scale(ESRS), vital signs, body weight, ECG, and laboratory tests. The results were as follows 1) On the PANSS total score, there was significant improvement of total score after 1 week (P<.05) of administratiom. 2) On the PANSS positive and negative subscal, there were significant improvement of posotive and negative scores after 2 weeks (P<.05) of administration. 3) On the PANSS general psychopatholgy subscals, there were significant improvement of general psychopathologyscores after 1 week (P<.05) of administratiom. 4) On the CGI, there was significant decreasement of clinical impression of severity of schizophrenia score after 2 week (P<.05) of administration. 5) A statistically significant increase in body weight (P<.05) was observed after 8 weeks of administration. 6) EPS reached the peak at the end of the 1st week of administration of risperidone (11.8± 24.25) but they were easily relieved by addition of benztropine and clonazepam. There was not significant change in laboratory tests, vital sign, ECG after 8 weeks of administration. These results suggest that Risperidone is an effective antipsychotics and clinically safe except for increased body weight in chronic schizophrenia.
치료저항 정신분열병환자에서 Clozapine의 효과 및 안전성
지익성,김영희,신석철,왕성근,신윤오,이선우,김정란 충남대학교 의학연구소 2001 충남의대잡지 Vol.28 No.2
In order to assess the efficacy and safety of clozapine, 50 in-patients with treatment-resistanat schizophrenia were evaluated using PANSS(Positive and Negative Symptome Scale for Schizophrenia), CGI(Clinical Global Impression), AMS(Abnormal Involuntary Movement Scale), Adverse Event-Somatic Symptoms, Neurological Rating Scale for EPS before and during treatment. Mean daily dosage of clozapine was 344.15±123.43mg at 12th week. A clinically significant improvement in positive, negative, and general psychopathology was noted as early as week 2 through 12 week. The tolerability of clozapine was generally found to be good. Drowsiness/sleepiness, Hypersalivation, and Constipation were the most common side effects. There was no neutropenia, and 3 patients suffered from seizures. These results suggest that clozapine is worth considering for the treatment-resistant patients
AC8A-T6 알루미늄 合金材의 切削加工 特性에 關한 硏究
최현민,김경우,김우순,김용환,김동현,채왕석 한국공작기계학회 2002 한국공작기계학회 추계학술대회논문집 Vol.2002 No.-
In this study, examined the cutting characteristics of alumuminum alloy AC8A-T6 that is used to present car piston materials. And in been holding materials machining empirically escape as result that experiment comparison changing the cutting speed and feed on various condition to choose efficient machining condition. The following results can be summarized from this research. 1.As the cutting speed decreased, principal cutting force and thrust cutting force is increased, and reason that cutting force interacts greatly in the low cutting speed is thought by result by BUE's stabilization. 2.The feed speed and cutting speed increase, friction factor is decrescent and the cause appeared the thrust cutting force is fallen than cutting force relatively because chip flow according to increase of the feed rate is constraint. 3.Though specific cutting resistance grows cutting area and the feed rate are few, the cause was expose that shear angle decreases by rake face of tool gets into negative angle remarkably as wear of a cutting tool or defect part of workpiece is cut. 4.Cutting speed do greatly depth of cut is slow, surface roughness examined closely through an experiment that becomes bad, and know that it can get good surface that process cutting speed because do feed rate by 0.1㎜/rev low more than 250m/min to get good surface roughness can.
( Young Kul Jung ),( Jong Eun Yeon ),( Woo Sik Han ),( Ji Hoon Kim ),( Jeong Han Kim ),( Jong Jae Park ),( Jae Seon Kim ),( Young Tae Bak ),( Wang Don Yoo ),( Sun Pyo Hong ),( Soo Ok Kim ),( So Young 대한소화기기능성질환·운동학회 2010 Gut and Liver Vol.4 No.2
Background/Aims: The aim of our study was to define the potential role of virologic response at 12 months of treatment (VR12) in predicting subsequent virologic and clinical outcomes in adefovir (ADV)-treated lamivudine-resistant chronic hepatitis B. Methods: Two hundred and four patients with lamivudine-resistant chronic hepatitis B virus (HBV) treated with ADV monotherapy were included. Serum HBV DNA was quantified by real-time polymerase chain reactions. VR12 was defined as a HBV DNA level of less than 4 log10 copies/mL after 12 months of ADV treatment. Results: VR12 was observed in 110 of the 204 patients (54%). The mean HBV DNA reductions from baseline after 12 months of ADV treatment were 3.8 and 1.9 log10 copies/mL in patients with and without VR12, respectively (p<0.001). The hepatitis B e antigen (HBeAg) seroconversion rates in patients with and without VR12 were 32% and 14% at 12 months treatment, respectively (p=0.018), and 40% and 27% at 24 months of treatment (p=0.032). The genotypic mutation rates to ADV in patients with and without VR12 were 0% and 6% at 12 months of treatment, respectively (p=0.033), and 21% and 42% at 24 months (p=0.012). The rates of viral breakthrough in patients with and without VR12 were 0% and 7% at 12 months of treatment, respectively (p=0.072), and 9% and 25% at 24 months (p=0.006). Conclusions: Patients without VR12 may need to switch to or add on other potent antiviral drugs in their medical regimens. (Gut Liver 2010;4:212-218)
김선영 ( Sun Young Kim ),한삼성 ( Sam Sung Han ),김영희 ( Young Hee Kim ),유왕근 ( Wang Keun Yoo ) 대한미용학회(구 대한미용과학회) 2018 대한미용학회지 Vol.14 No.2
This study was carried out to examine the effect to influence the customer’s satisfaction of SNS characteristics of nail shops. The data were collected from 452 customers who visited nail shops in Daegu and Gyeongbuk region, using self-administered questionnaire for the period from May 1 to Aug 30, 2016. This study showed that there was a statistically significant difference in the customer’s satisfaction according to education level. The satisfaction level of SNS characteristics, the customer’s satisfaction tend to be higher according to the increase of educational level. The multiple regression also showed that the satisfaction level of customer on services are likely to be higher according the increase of the level of satisfaction of the subjects on SNS characteristics. The SNS characteristics of nail shops has a very strong effect on the satisfaction of the customers of nail shops. Thus, in order to strengthen competent power in the market, development and the positive use of tailor-made SNS in the nail shops considering the characteristics of customers should be needed.