불화석 용액내 불소농도의 장기변화와 첨가물의 영향에 관한 실험적 연구

유두선,이광희,최윤주,김대업 大韓小兒齒科學會 1996 大韓小兒齒科學會誌 Vol.23 No.2

The purpose of this study were to measure the solubility of the stannous fluoride experimentally,to find a method for improving the solubility of the stannous fluoride,and to observe the effect of longterm storage of the variation of the concentration of fluoride in the stannous fluoride solutions.By adding such materials as antiseptics,dye,flavor,and tests to solution,the variation of the fluoride concentration was also observed. Ten groups of 0.4% stannous fluoride solutions to which glycerine,sodium chloride,chlorhexidine,dye,flavor,xylitol,and sorbitol were added were prepared.The measurements were carried out by direct calibration. The obtained results were as follows. 1.Effect of adding glycerine as solvent:This solubility of the stannous fluoride increased in the case of adding glycerine.By increasing the glycerin concentration,the fluoride level in stannous fluoride solution also increased. 2.Effect of adding sodium chloride and chlorhexidine.:Comparing to the case of pure water,low fluoride level was measured in case of adding sodium chlorid and high fluoride level was measured in case of adding chlorhexidine. 3.Effect of adding erythrosin as dye and banna essence as flavor.:Adding erythrosin and banna essence didn't affect fluoride level. 4.Effect of adding xylitol and sorbitol.:The effects of xylitol and sorbitol were nearly the same as the effect of adding erythrosin and banna essence.

精神治療 個人指導監督에 대한 被監督者들의 意見調査Ⅱ

柳凡熙,趙斗英 大韓神經精神醫學會 1991 신경정신의학 Vol.30 No.2

This study is to investigate the opinions of supervisees on the individual supervision of psychotherapy. The subjects of the study are 3rd-year psychiatric residents working for the training hospitals all over the country in 1989 and psychiatric specialists certified in the same year. 112 persons, whose addresses were identified, were included in the study. The data for the investigation were collected from July 18 to October 28 in 1989 by means of a questionnaire sent by post. Among the 50 respondents, there were 28 psychiatric residents and 22 psychiatric specialists. We analyzed the content of the questionnaire. Results are as follows; 1) Among the respondents, the proportion of psychiatrists practicing psychotherapy is 70% in this study. This is lower than that from the previous study by the authors which was carried out on psychiatric residents working for Seoul National University Hospital and psychiatric specialists trained in the same university hospital. But It is higher than 58% derived from the other domestic study. 2) Conditions to be a good supervisor preferred by supervisees are `age of fifties' and `great experience'. The opinion that the sexual difference of supervisors is not important is somewhat more common than the opinion that men are preferred to women as supervisors. 3) The advantage of having more than one supervisor simultaneously is varieties of instructions' and `being more neutral and objective', and there are a lot of more positive responses. 4) The supervisees favor once per week as the ideal frequency of supervision and an hour per session as the ideal time. A standard for how to choose a case to be discussed in the supervision is to feel difficulty in treating patients. In the supervision, most of supervisees expect help from supervisors and have curiosity for learning, and some of them become tense or anxious. Most of them favor the 2nd-year residency as a good period for beginning supervision and believe that the individual supervision of psychotherapy is needed even after the residency training. 5) Most of supervisees favor 4-6 months as the ideal duration of supervision by one supervisor, but they want the supervision to be deeper and more analytic. Supervisees are usually satisfied with the psychotherapy supervision even though they often get angry with their supervisors. Considering these contradicting attitudes we are concerned that they are somewhat confused in understanding the nature of supervision. 6) The most appropriate method of the case presentation in supervision is verbatim-method and the best place for supervision is the personal office of a supervisor. 7) Most of the supervisees believe that the personal intimacy and good matching between supervisors and supervisees have a great effect on supervision. All of them expressed need to choose their supervisors freely for themselves, but they are skeptical about the practicality of the idea. 8) In the previous study by the authors, psychiatric residents tended to accept the opinions of supervisors more frequently than psychiatric specialists did when they had different ones, and the subjects of this study have a similar tendency to the psychiatric residents. Besides this, most of supervisees imitate supervisors more or less. 9) Among important learnings from supervisors, supervisees choose therapeutic attitudes to deal with patients' and `to know their own problems'. They believe that the most desirable improvement in supervision is to get deeper and more enthusiastic supervision.

위아전절제술 후 정맥통증자가조절시 Morphine Sulfate와 Ketorolac의 진통효과

유슈봉,윤광,김두식 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.4

Background: Morphine sulfate, the most commonly used analgesic, produces adequate analgesia for postoperative pain. The authors studied the efficacy and incidence of side effects of morphine sulfate IV-PCA for postoperative analgesia and compared these to butorphanol. Method: Forty ASA physical status I or II patients undergoing subtotal gastrectomy were randomly allocated to one of two groups: Group M (morphine sulfate 60 mg and ketorolac 180 mg, n=20), Group B (butorphanol 10 mg and ketorolac 300 mg, n=20). Drugs for both group were mixed with normal saline (total 100 ml) for infusion. Bolus dose, maintenance dose and lockout interval were 0.5 ml per each press, 1 ml/hr and 15 minutes, respectively. In each groups, numerical rating scale (NRS) score, sedation score and incidence of side effect were checked Results: The NRS score of group M is lower than that of group B (P < 0.05) during 24 hours after the operation. There were no significant differences in sedation score and incidence of side effect between two groups. Conclusions: We recommend 60 mg morphine sulfate, mixed with 180 mg of ketorolac, and normal saline for postoperative pain relief using IV-PCA after subtotal gastectomy.

포도재배용 봉지제조 기술개발 : 포도 재배용 봉지의 특성 변화와 포도당도 Effect of Grape-Bagging Paper Properties on Grape Saccharinity

유병철,박종문,이영주,윤두훈 충북대학교 한국과학재단 지정 첨단원예기술개발 연구센터 2002 연구보고서 Vol.6 No.-

이 연구는 포도의 생육기간에 사용되는 봉지의 특성이 포도의 생육과 당도에 어떤 영향을 미치는지 알아보고자 수행되었다. 포도의 생장에 영향을 미치는 많은 요소가 있지만 빛의 영향을 가장 많이 받는 것으로 알려져 있다. 그래서 미국과 유럽의 경우 다른 경제적인 이유도 있지만, 포도가 빛에 그대로 노출되도록 봉지를 씌우지 않는 무대재배를 한다. 국내의 경우는 식용 생과의 생산이 목적이기 때문에 포도의 생장기간에 병충해방지 및 과실의 착색효과 및 외관보호 등 여러 목적을 가지고 봉지를 씌워서 재배를 한다. 봉지의 구조에 따라서 포도의 생육과 당도에 영향을 미치게 되므로, 봉지를 만드는 원료인 섬유의 종류와 고해정도를 달리해서 봉지를 제작하여 포도를 생산했다. 실험실에서 제조한 종이로 재배한 포도의 당도가 기존에 사용되던 봉지로 재배된 포도보다 당도가 약 0.7 Brix 정도 높았다. 또한 침엽수 천연섬유와 침엽수 재생섬유, 침엽수와 활엽수 섬유를 혼합하여 만든 종이와 활엽수 섬유로 만든 종이가 빛의 투과성과 동도에 상반된 결과를 보였으며, 봉지가 빛을 많이 흡수할수록 당도가 높음을 알 수 있었다. 봉지내부의 온도변화를 측정한 결과 포도의 생육에 적정한 온도가 있음을 추정할 수 있었다.

경막외 혈액 봉합술을 시행받은 자발성 두개내 저압 환자의 분석

김두식,유수봉,윤상호 고신대학교 의과대학 2009 고신대학교 의과대학 학술지 Vol.24 No.2

Background : Spontaneous intracranial hypotension(SIH) is found as a not uncommon cause of headache recently. We wanted to study its demographic characteristics, presenting symptoms and findings and the effect of autologous epidural blood patch (AEBP). Methods : We retrospectively analyzed medical records of 11 patients who were diagnosed of spontaneous intracranial hypotension and treated with AEBP from March of 2006 to October of 2009. Results : Age of patients(10 female and 1 male) was ranged from 29 to 51 years (mean 38.8 years). Their presenting symptoms included typical postural headache(11/11), nausea and vomiting(7/11), dizziness(2/11), stiff neck or neck pain(2/11), shoulder pain(2/11), and back pain(1/11). In nine patients CSF pressure was checked, CSF pressure was less than 6 cmH2O in 8 patients. In nine of eleven patients, CSF leakage was detected in cisternography. Brain MRI showed diffuse meningeal enhancement in six patients and subdural hematoma in one. VAS of postural headache decreased from 8-10(mean 9.6) to 1-5(mean 1.6) after AEBP. Conclusion : Most of the SIH patients were otherwise healthy people. It was prevalent among women, especially young adult. AEBP showed as an excellent treatment modality.

Acylthiocholine의 합성

정두희,이지현,박유미,정대일,곽문정,신영주 東亞大學校附設基礎科學硏究所 1998 基礎科學硏究論文集 Vol.15 No.2

Choline esters that are used with substrate of EE-AChE-catalyzed hydrolyses were synthesized by two methods. 2-Chloroethyl thiohexanoate 4a, 2-chloroethyl thioheptanoate 4c, and 2-chloroethyl thiooctanoate 4b were synthesized by treatment of hexanoyl chloride 3a, heptanoyl chloride 3c, and octanoyl chloride 3b with ethylene sulfide 2. Hexanoylthiocholine 6a and octanoylthiocholine 6b were synthesized by using 4a and 4b with trimethylamine 5. Secondly after reaction ethylene sulfide 2 with dimethyl amine 7 and acylation by acid anhydride 8, heptanoylthiocholine 6c, decanoylthiocholine 6d were synthesized by treatment of methyl iodide.

Streptobacillus sp.가 생산하는 pullulanase에 관한 연구

오두환,지희숙,최형택,신원철,유주현 연세대학교 산업기술연구소 1986 논문집 Vol.18 No.2

A bacterium with the highest pullulanase activity was isolated from the soil and identified as Streptobacillus sp. Y-716. The optimum culture condition of Streptobacillus sp. for the production of pullulanase was as follows; 1.2%(w/v)soluble starch, 0.7%(w/v) CH₃COONH₄, 0.05%(w/v) MgSO₄7 H₂O, 0.01%(w/v)FeSO₄7H₂O, at 30℃, for 48 hrs. The pullulanase from the culture broth of Streptobacillus sp. Y-716 was purified about 46 fold by ammonium sulfate precipitation, dialysis. DEAE-cellulose and Sephadex G-200 column chromatography. The purified enzyme was stable between pH 5.0 and pH 7.5. It was inactivated rapidly above 35℃. The Km value and Vmax of the purified enzyme were 0.0137mg/m/ and 0.666μm/min. on pullulan, respectively.

Plasmid DNA pBR 322의 증폭과 Hydroxyapatite Chromatography에 의한 분리

오두환,유주현,신원철,정건섭,유승구 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.1

The amplification and the isolation conditions of pBR322 plasmid DNA were investigated. For the amplification of pBR322 plasmid DNA, cells from logarithmic growth phase were most effective. The optimal conditions for the amplification of pBR322 plasmid DNA in Escherichia coli GM4 were obtained as follows; 50-150 ㎍/ml of chloramphenicol concentration, 6-8 hours of incubation time in the presence of chloramphenicol. Ampicillin and tetracycline had no effect on the amplification of pBR322 plasmid DNA. Approximately 1 mg of pBR322 plasmid DNA was purified from 3.5 ℓof Escherichia coli GM4 culture broth by hydroxyapatite chromatography. The purified pBR322 plasmid DNA was expressed in Escherichia coli C600.

확장된 자료 종속성 제거 방법을 이용한 프로시저 변환

장유숙,박두순 순천향대학교 부설 산업기술연구소 2001 순천향 산업기술연구소논문집 Vol.7 No.2

In this paper the proposal of parallelism on sequential loop since most program execution time is consumed in loop structure. This procedure is about automatic transformation to nested DOALL loop and nested loops to reduce data dependency efficiently. And the study to extract the parallelism is about in only one procedure transition. But almost all programs have potential parallelism in between procedures. A procedure call, which has only one loop structure or procedure call, is almost all are concentrated on uniform code, which is in the distance of data dependency in uniform.For the parallelism on loops or procedure that has loops on paralleisms are concentrated on uniform code.We presents algorithms which can be applied with uniform code, nonuniform code and complex code. The proposed algorithm evaluate using CRAY-T3E. The result of performance evaluation is that proposed algorithm is an effect.

수소화된 비정질 규소와 다결정 규소 박막의 반송자 이동도

최유신,정세민,안두수,이준신 成均館大學校 科學技術硏究所 1997 論文集 Vol.48 No.1

열처리는 규소 박막의 구조적, 광학적 성질뿐만 아니라 반송자 이동도 특성을 변화시킨다. 반송자 이동도는 주파수 응답 또는 시간 응답을 통해 소자의 동작에 영향을 끼친다. 본 논문은 수소화된 비정질 실리콘(a-Si:H)의 이동도 변화를 열처리 온도의 함수로써 살펴보았다. 이동도 측정에서 사용된 방법들에 대한 장단점들에 대해 검토하였다. 홀 효과와 Haynes-Shockley 방법은 a-Si:H 박막의 이동도 결정에 대한 오류를 나타내었다. TOF법은 a-Si:H에는 적용 가능하지만 높은 암전류때문에 다결정 실리콘(poly -Si)에는 적용할 수가 없다. 전도를 제한하는 공간전하, 박막 트랜지스터, 과도 전류 관찰방법등은 a-Si:H와 poly-Si의 이동도를 결정할 수 있었다. 규소 박막의 전계효과 이동도는 700℃이상의 고온처리와 RF 플라즈마 재수소화후에 20∼67㎠로 상승된 값을 얻었다. 우리는 박막 트랜지스터(TFT)와 과도 전류 관찰방법은 박막 실리콘 분석에 적당하다는 결론을 얻었다. The carrier mobility influences the device behavior through its frequency response or time response. This paper summarizes the mobility changes of the a-Si:H as a function of anneal temperature. The anneal treatment changes the carrier mobilities of thin film Si as well as optical and structural properties. The advantages and disadvantages were discussed for the employed methods in mobility measurement. Hall effect and Haynes-Shockley (HS) method exhibited some errors for a-Si:H mobility determination. A time of flight (TOF) method was attractive for the a-Si:H but not applicable for the poly-Si films because of high dark current. Space charge limited conduction (SCLC), thin film transistor (TFT), and transient current observation methods were able to determine the mobilities of a-Si:H and poly-Si films. A very high field effect mobility of 20-67㎠/V.s was observed after the high temperature anneal above 700℃, and grain boundary passivation using a RF plasma rehydrogenation. We learned that thin film transistor and transient current observation methods are suitable for the analysis of thin film Si.