전처리한 목섬유로 제조한 섬유판의 물리적 및 기계적 성질

李弼宇,辛榕洙 서울大學校 農業生命科學大學 農業開發硏究所 1996 서울대농학연구지 Vol.21 No.2

This paper reports on dimensional stability of the composites made from acetylated wood-fibers. The fiberboards at this study were made by different face-layer formulation ratios(10, 20, 30, 40 and 50%) of acetylated wood-fibers. In this experiment, acetylation of wood-fiber was reacted with liquid acetic anhydride in stainless steel cylinder. The WPG(weight percent gain) as a result of acetylation was calculated based on the weight of oven-dry untreated wood-fiber, and the 17% WPG could be achieved in reaction time from 2 hours. In physical properties of fiberbodards made from acetylated wood-fiber, thickness swelling and water absorption were more reduced than control fiberboards, but mechanical properties(MOR, MOE and IB) decreased with increasing of face-layer formulation ration of acetylated wood-fibers, which was probably due to poor adhesion and uncontinuous mat forming between acetylated fiberboards and control fiberboards. In the IB test on acetylated fiberboards most failure occurred in the boundary between acetylated face-layer and untreated core-layer. In the acetylated fiberboards, the failure was due to adhesive penetration and compressibility problems associated with acetylated fiber.

급성충소돌기염의 임상 : 병리학적 고찰

양기화,조준필,하영천,한진우,정학재,손수창,이성희,황재훈,신철호 최신의학사 1989 最新醫學 Vol.32 No.4

천마분말이 고콜레스테롤혈증 흰쥐 혈청의 지질성분에 미치는 영향

박미연,성낙주,신정애,이수정,박필숙 동아시아식생활학회 1998 동아시아식생활학회지 Vol.8 No.1

This study was designed to investigate the optimum recommendation level on Gastrodia rhizoma and the effects on the improvement of the lipids in the dietary hypercholesterolemic rats. Experimental diets mixed with 5% Dioscorea batatas(Group 2), 10% Dioscorea batatas(Group 3), 15% Dioscorea batatas(Group 4), 5% Gastrodia rhizoma(Group 5), 10% Gastrodia rhizoma (Group 6) and 15% Gastrodia rhizoma(Group 7) were administered to the male rats of the Sprague Dawley for 3 weeks. Concentration of total cholesterol in serum was lower in the Gastrodia rhizoma groups than in the other groups, especially total cholesterol concentration of 10% Gastrodia rhizoma(Group 6) was the lowest in the Gastrodia rhizoma groups. Concentration of HDL-cholesterol in serum was higher in the 10% Gastrodia rhizoma and 15% Gastrodia rhizoma than in the other groups. Concentrations of cholesterylester, LDL, LDL-cholesterol in serum were the lowest in the 10% Gastrodia rhizoma. Concentration of glucose and activity of GPT in serum were the lowest in the 10% Gastrodia rhizoma group. The activity of GOT in serum was lower in the 10% Gastrodia rhizoma group and 15% Gastrodia rhizoma group than in the other groups. Therefore, we consider that there are effects on the improvement of the lipids in the Gastrodia rhizoma and the optimum recommendation quantity of Gastrodia rhizoma is 10% to quantity of food composition.

신생아 고 17α-Hydroxyprogesterone치의 추이

박은영,조진형,이수진,양승,김광남,신재훈,오필수 대한소아내분비학회 2003 Annals of Pediatirc Endocrinology & Metabolism Vol.8 No.2

온라인 게임을 위한 플랫폼 현황 및 발전 방향

신필수(Phil Soo Shin),박종목(Chong Mok Park) 한국정보과학회 2009 정보과학회지 Vol.27 No.10

A Significant Number of Sessile Serrated Adenomas Might Not Be Accurately Diagnosed in Daily Practice

( Soo Woong Kim ),( Jae Myung Cha ),( Joung Il Lee ),( Kwang Ro Joo ),( Hyun Phil Shin ),( Gou Young Kim ),( Sung Jig Lim ) 대한소화기기능성질환·운동학회 2010 Gut and Liver Vol.4 No.4

Background/Aims: The diagnosis of hyperplastic polyps (HPs) may involve a conglomeration of subgroups of serrated polyps. The diagnosis of HPs may therefore be revisited if this is sessile serrated adenoma (SSA). The aim of this study was to determine clinically and endoscopically relevant information associated with reclassification to SSA. Methods: After reviewing the data from 1,372 patients who underwent colonoscopic polypectomy, 49 HPs larger than 10 mm were analyzed in this study. Two gastrointestinal pathologists reclassified each of the original 49 HPs as conventional HPs, SSAs, and others. Results: Among the 49 initially diagnosed HPs, 18.4% were reclassified into SSAs or mixed polyps. Overall architectural features were useful for the diagnosis of SSA, but cytological features were less useful. The patient and polyp characteristics did not differ between HPs with and without reclassification of the initial pathological diagnosis. Conclusions: A significant number of SSAs might not be accurately diagnosed in daily clinical practice without any predilection for size, shape, and location. Therefore, when large HPs are diagnosed in clinical practice, it is necessary for physicians to have greater awareness of the diagnosis of SSA and to individualize subsequent surveillance. (Gut Liver 2010;4:498-502)

Preoperative Carbohydrate Antigen 19-9 Levels Can Predict Stage and Survival Rate in Patients with Colorectal Cancer

( Soo Young Moon ),( Jae Myung Cha ),( Joung Il Lee ),( Kwang Ro Joo ),( Hyun Phil Shin ),( Jae Jun Park ),( Jung Won Jeon ),( Jun Uk Lim ),( Seung Jung Jun ),( Yoon Jong Seo ),( Chi Hoon Lee ) 대한장연구학회 2013 Intestinal Research Vol.11 No.3

Background/Aims: The purpose of this study was to determine whether preoperative carbohydrate antigen 19-9 (CA 19-9) levels can predict the stage of diseases or survival rate in patients with resectable colorectal cancer (CRC). Methods: A total of 247 patients who underwent curative resections at Kyung Hee University Hospital at Gangdong between 2006 and 2011 were enrolled. We investigated the correlations of preoperative serum levels of CA19-9 with clinicopathological features of CRC. Receiver operative curve was constructed for evaluating the efficiency of the serum CA 19-9 levels in the stratifying stage of CRC. Survival analysis was performed with Kaplan-Meire method and log-rank test. Cox regression analysis was used for the multivariate analysis for survival. Results: Abnormal level of serum CA 19-9 (>37 IU/mL) were associated with advanced T stage (P<0.001), N stage (P=0.002) and TNM stage (P<0.001) in patients with resectable CRC. Furthermore, abnormal level of serum CA 19-9 were related with vascular invasion (P=0.002) and lymphatic invasion (P=0.026). The area under the curve was 0.75 (95% confidence interval [CI] 0.67-0.83) for T4 stage CRC and 0.680 (95% CI 0.61-0.75) for TNM stage III CRC. In patients with TNM stage III CRC, a preoperative CA 19-9 higher than 60 IU/mL (P=0.033) and presence of vascular invasion (P=0.002) were identified as significant predictors of survival rate on multivariate analysis. Conclusions: In patients with resectable CRC, preoperative CA 19-9 correlates with T stage, N stage and TNM stage of disease. Serum CA 19-9 >60 U/mL was an independent predictor of survival rate in the patients with TNM stage III CRC. (Intest Res 2013;11:184-190)

Preparation and characterization of polyacrylonitrile-based carbon fibers produced by electron beam irradiation pretreatment

Shin, Hye Kyoung,Park, Mira,Kang, Phil Hyun,Choi, Heung-Soap,Park, Soo-Jin Elsevier 2014 Journal of industrial and engineering chemistry Vol.20 No.5

<P><B>Abstract</B></P> <P>This study evaluated the feasibility of polyacrylonitrile (PAN) fibers stabilized by thermal treatment after electron beam irradiation (EBI) in the production of carbon fibers. The effects of EBI and thermal treatments on the PAN precursor were verified by FT-IR, differential scanning calorimetry (DSC), X-ray diffraction (XRD), and scanning electron microscopy (SEM). FT-IR spectra confirmed that the intensities of the CN stretching vibration at 2244cm<SUP>−1</SUP> significantly decreased as the thermal treatment temperature increase from 200°C to 250°C and the holding time from 20min to 40min after EBI process. This decrease was caused by the cyclization of nitrile groups upon stabilization by the EBI and thermal treatments. The thermal properties were characterized by DSC, which confirmed that the EBI affected the quantity of the released heat as well as the position of exothermic equilibrium over a wide range of low temperatures. The majority of the exothermic peaks disappeared after thermal treatment. The stabilization index (SI) values for the PAN fibers that were exposed to EBI and thermal treatment after EBI were evaluated by XRD. The SI value of the PAN fibers that were treated at 250°C for 40min after EBI was 99.21%. Additionally, the tensile strength of carbon fibers that were produced from PAN attained about 2.3GPa, the cross-section exhibited a clear and brittle morphology.</P>

A Case study of Applying Learning analytics in General Mathematics Class

Jeong-Phil Hu,In-Ae Kang,Seung-Soo Shin 중소기업융합학회 2015 중소기업융합학회 국제학술대회논문집 Vol.2 No.1

The researcher hope to extend the cafe management period and aims to draw more active participation through various methods and use more tools of communication with the students to receive continuous feedback not only during exam period but during the semester. As mentioned in the debate, the class will be supplemented to help not only the teacher but also the students, in line with the purpose of learning analytics, and the researcher confirmed that by analyzing the learners' learning activities and styles using Naver Cafe's analysis tools, the quality of the individual learning abilities can be enhanced. In the future, this research could be useful as a case study of using learning analytics and hopefully learning analysis tools will be used more widely in education and that this research can be extended into more fields.

성장호르몬결핍성 환아에서 약물자극분비된 성장호르몬과 야간 3시간 자연분비된 성장호르몬과의 연관성

오필수,신재훈,차재국,김기중 대한내분비학회 1998 Endocrinology and metabolism Vol.13 No.1

Nowadays, to evaluate growth hormone(GH) deficiency-suspicious short stature, we usually use more than two kinds of provocative tests using various pharmacologic agents such as clonodine, L-dopa, insulin, etc. However, the importance of physiologic natural secretion of GH was recently approved. In the past, diagnosis of GH neurosecretory dysfunction was made by studying the 24-hour spantaneous GH secretion profile. But, because it is very clinically difficult, and so we measured and evaluated the mean GH concentrations of blood samples, obtained every 30 minutes during the first 3 hours' nocturnal sleep, instead of that. At the department of Pediatrics, Hanyang University Hospital from November, 1992 to February, 1994, we selected 34 GH deficiency-suspected children on the base of their growth data and bone age, etc. After GH stimulation with clonidine(100-150 ug/m2) and L-dopa(200-250 mg/m2), we measured their peak GH values by the immunoradiometric assay(IRMA) kit. And, we measured the mean GH concentrations of blood samples, obtained every 30 minutes during the first 3 hours noctumal sleep(22:OOPM-1:OOAM). Results: 1. We analyzed the relationship between the mean of 3-hours' physiologic night-time surge of GH(X) and the phamacologically stimulated peak GH level(Y), except for the two neurosecretory dysfunction suspicious children. And so, for the 32 children, the relationship was Y=1.806X+ 3.177, r= 0.794, p$lt;0.01. However, for all the tested children(34), the relationship is Y=1.709X+ 4.06, r=0.737, p$lt;0.01. 2. We analyzed the relationship between the peak of 3-hours' physiologic night-time surge of GH(X) and the phamacologicaUy stimulated peak GH level(Y), except for the two neurosecretory dysfunction suspieious children. And so, for the 32 children, the relationship was Y=0.683X+ 3.686, r=737, p$lt;0.01. Conelusion: For all the tested children(34), the relationship between the mean 3hr physiologic GH night time surge and stimulated peak GH value is Y=1.709X+4.06, r=0.737, p$lt;0.01. The percentage of GH neurosecretory dysfunction is 5.8%(2/34). And, except for the two childrren, the relationship is more good, Y=1.806X+3.177, r=0,794, p$lt;0.01. On the above relationship, the 3-hour GH night time-surge test might to give us some helpful information for the diagnosis of neurosecretory dysfunction. (J Kor Soc Endocrinol 13:16-23, 1998)