α-Sialon 세라믹스(X=0.15)의 기계적 성질에 미치는 소결분위기 및 ZrO₂의 첨가 영향

임헌진,조덕호,이홍림,이경원 연세대학교 산업기술연구소 1991 논문집 Vol.23 No.1

4.82 wt% AIN and 2.95 wt% Y₂O₃were added to Si₃N₄as sintering agents in order to have α-Sialon composition of X=0.15 and monoclinic ZrO₂between 0 to 10 wt% was admixed with Si₃N₄. Si₃N₄based ceramics were fabricated by hot-pressing at 1750℃ for 90 min under 30 MPa in argon and nitrogen atmospheres Effects of sintering atmospheres and addition of ZrO₂on mechanical proporties of Si₃N₄based ceramics were investigated. As ZrO₂content increased, the fraction of α-Sialon tended to decrease and the amount of cubic ZrO₂increased because Y₂O₃acted as the stabilizer of ZrO₂. The sintering atmospheres didn't affect on the sintering behavior and the product phases in hot-pressing of Si₃N₄. Bending strength increased when ZrO₂was added up to 3 wt%. Hardness showed tendency to decrease with ZrO₂content. ZrO₂didn't contribute to the increase of fracture toughness because stabilized cubic ZrO₂was produced by the added Y₂O₃.

저크비용함수를 이용한 골프 숙련자와 초보자간의 퍼팅 동작 분석

임영태,최진승,한영민,김형식,이정한,전재훈,탁계래 한국운동역학회 2006 한국운동역학회지 Vol.16 No.1

침전법에 의한 알루미나 분말제조 Ⅲ. 소결체의 열적·기계적 특성

임헌진,이홍림,이형직,홍기곤 연세대학교 산업기술연구소 1992 논문집 Vol.24 No.1

A precipitation method was adopted in order to prepare high-tech Al₂O₃ceramics. Al₂(SO₄)₃·18H₂O was used as a starting materials and alumimum hydroxides were obtained by single precipitation method at the pH condition 7 and 11, using NH₄OH as a precipitation agent. Fine Al₂O₃powders were prepared at optimum calcination condition and were sintered at 1650℃ for 4 h in air. Microstructures and mechhanical properties of Al₂O₃ceramics were investigated. Doped MgO limited the grain growth of Al₂O₃and increased grain size homogeneity of Al₂O₃Flexural stregth values were 340∼430 MPa. Critical temperature difference?? was 175 K showing rapid strength degradation by thermal shock.

Piperine 유도체 〔3-(3',4'-dihydroxyphenyl)-2-propenic acid amide〕의 합성에 관한 연구

林中基,咸元勳,김진영 성균관대학교 약학연구소 1990 成均藥硏論文集 Vol.2 No.1

Abstract-3,4-Methylenedioxyphenyl cinnamic acid was synthesized from the reaction of 3,4-methylenedioxy benzaldehyde with malonic acid, via Perkin reaction and it was added to SOCI_2. From acid chloride, many amide derivatives were synthesized, using various amines. In the final step, cleavage of 3,4-methylenedioxy group was not accomplished by the traditional method of halogenation with phosphorous pentachloride. And, protection of the OH-group of catechol with tosyl, acyl, methoxy methyl chloride or acetonide was failed. So, aryl benzyl ethers were prepared from a protocatechualdehyde by treating an alkaline solution of the protocatechualdehyde with a benzyl chloride. Amide derivatives were synthesized from the former ways. Benzyl group was readily removed by hydrogenolysis.

휴대용 근적외분광분석기를 이용한 유탕면의 수분 함량 측정 : Infrared(NIR) System

임현량,김도형,우영아,김효진 동덕여자대학교 종합약학연구소 2002 동덕약학연구지 Vol.6 No.-

This experiment was carried out to determine non-destructively water content in a intact fried noodle in oil by portable near-infrared system. Water content was ranged from 0 to 14.3w/w% and the near infrared (NIR) measurements were made on 70 intact samples over the spectral range 1100-1750nm. We found the variation of absorbance band due to OH vibration of water in the noodles depending on the concentration change around 1450nm in the second derivatives spectra. Partial least squares(PLS) regression models were set up using a calibration set(42 E.A.) and a validation set(28 E.A.) between the NIR response and value from loss on dry. Various pretreatments of the spectra were examined: the smallest stnadard error of prediction(0.35%) was obtained using autoscaling spectra over 1100-1700nm. 10 factors were required for the PLS model to give a good relationship between the spectral information and the noodle water content. In order to validate the developed calibration model, routine analyses were performed using other intact noodles. Water contents from the NIR calibration model were compared with the values from loss on dry and the results showed good correlation with those of loss on dry. This study showed that the rapid and non-destructive determination of water content in a intact fried noodle in oil was successfully performed by portable NIR system.

하동카올린의 탄소환원법에 의한 질화거동

이형복,이홍림,이형직,임헌진 연세대학교 산업기술연구소 1985 논문집 Vol.17 No.2

Nitridation behavior of Hadong Pink Kaolin was studied over the temperature range of 1250-1350℃ in N₂-H₂atmosphere. Carbon was used as a reducing agent. Mullite, α-quartz, Si₂N₂O, X-phase, 15R-AIN, SiC and cristobalite were formed as intermediate products during reaction. But the final product was almost β-Sialon phase, when the reaction proceeded longer than 10hr at the C/H.K.(SiO₂) ratio larger than 3.

인슐린 비의존성 당뇨병에 동반된 심상성 천포창 1 례

이상준,박진용,임태형,윤영호,권순대,남창욱,허규찬,박근용,구본식,김상표,장종억 啓明大學校 醫科大學 1997 계명의대학술지 Vol.16 No.3

저자들은 인슐린 비의존형 당뇨병 환자에서 통증성 구강내 미란 및 전신성 수포성 미란을 동반한 심상성 천포창 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Various skin conditions such as diabetic dermopathy, necrobiosis lipoidica diabeticorum, bullosis diabeticorum, granuloma annulare occur frequently in diabetes, although common lesions may be associated by chance. Pemphigus vulgaris(PV) is a blistering skin disease seen predominantly in elderly patients. This disorder is characterized by the loss of cohesion between epidermal cells with the resultant formation of intraepidermal blisters. These blisters rupture easily, leaving denuded areases that may crust and enlarge peripherally. In half or more of patients, lesions begin in the mouth: approximately 90% of patients have oromucosal involvement at some time during the course of their disease. But the relationship of this disorder with diabetes is not clear. We experienced a case of pemphigus vulgaris associated with NIDDM in 67 years old woman who was admitted due to painful oral ulcer and control of blood glucose, so we present this case with a review of literatures.

수용성 키틴이 백서 창상치유에 미치는 영향

강장석,조용남,정상훈,유 결,임진수,권 호,조용우,고석원 大韓成形外科學會 2001 Archives of Plastic Surgery Vol.28 No.1

『무정』의 계보 : 『무정』의 정본 확정을 위한 판본의 비교 연구

김철,이경훈,서은주,임진영 민족문학사학회 2002 민족문학사연구 Vol.20 No.-

이광수의 장편소설『무정』은 단행본으로 출판되는 과정에서 편집자에 의해 심하게 훼손되고 변개(變改)되었다. 신뢰할 만한 정본(定本)이 부재한 상태에서 그동안의 연구자들은 변개의 양상이 가장 심한 1962년도 삼중당 전집의 『무정』을 텍스트로 사용하였다. 이러한 현실이 『무정』연구의 질적 발전을 가로막았다. 이 논문은 이러한 사정에 주목하여, 1917년『매일신보』에 연재된 최초의 『무정』으로부터 가장 최근에 출판된 『무정』에 이르기까지 모두 아홉개의 판본을 검토하였다. 이 검토를 통하여 식민지 시대에 출판된 『무정』의 간행 상황과 그 판본들의 차이, 1956년 광영사에서 간행된 『무정』에서 가장 심한 훼손이 이루어진 사실, 그 이후 아무런 의심 없이 이 판본이 연구용 텍스트로 사용되어 온 사실 등이 밝혀졌다. 1990년대 이후 『무정』이 정본을 출판하기 위한 몇몇 시도가 있었지만, 그것 역시 오류가 많은 것들이어서 정본이라고 할 수 없다. 이 논문에서는 보다 완벽한 『무정』정본의 간행을 위해 기왕의 주요 판본들을 비교 검토하였고, 이에 따라 『무정』정본의 출판을 위한 기본적인 조건들이 마련되었다. A lot of paragraphs of Yi Kwang-Soo’s novel MuJeong had been changed and even spoiled by editors while it was published Many researches have used MuJeong SamJungDang Co. 1962 as an original text, which was most severely spoiled by editors. Reflecting upon this situation, we have scrutinszed nine texts, that is, from the first serialized MuJeong in Maeil Shinbo 1917 to the last one which was published most recently. From this scrutiny, we came to know not only many differences among the texts but also the fact that MuJeong has been published eight rimes during colonial era. Allthough there have been several tries to publish the original text of MuJeong since 1990’s they also include a lot of errors. From the scrutiny of this paper, we would be provided with the fundamental materials for the more complete text MuJeong.

복강경하 대장절제술을 시행 받는 환자에서 라모세트론과 온단세트론외 술 후 오심 및 구토 예방 효과 비교

김효중;어전영;어근무;어정한;엄세훈;조광래;김명훈 인제대학교 2011 仁濟醫學 Vol.32 No.-

Objectives : We evaluated the efficacy of ramosetron and ondansetron for preventing postoperative nausea and vomiting (PONV) in laparoscopic colectomy. Methods and Materials : Eighty patients who received laparoscopic colectomy were randomly divided into two groups: R group (ramosetron 0.1mg PO) and O group (ondansetron 4mg twice IV). Injection or oral medication was administered before the induction of anesthesia in each group. Injection was administered at the end of surgery in O group. General anesthesia was induced using propofol and rocuronium, and maintained with sevoflurane, remifentanil and air (FiO2 0.5), We investigated the incidences of PONV in each group by the Rhodes index of nausea, vomiting and retching (RINVR) at postoperative 6 and 24 hours. Results : The incidence of PONV was not different between group at each time points after surgery (at postoperative 6 hours: 20% in group R, 17.5% in group 0, at postoperative 24 hours; 12.5% in group R, 7.5% in group 0). There was no difference in the severity of PONV, satisfaction, rescue drug usage. Conclusion : Prophylactic therapy with ramosetron is as effective as conventional prophylactic therapy with ondansetron for preventing PONV in general anesthesia for laparoscopic colectomy.