Preparation of petroleum impregnating pitches from pyrolysis fuel oil using two‑step heat treatments

Jong‑Eun Choi,Seunghyun Ko,Young‑Pyo Jeon 한국탄소학회 2019 Carbon Letters Vol.29 No.4

Petroleum-based impregnating pitches were prepared from pyrolysis fuel oil (PFO) using a two-step heat treatment without a separation process. The pressurized heat treatment, the first step, was used to improve the properties of the pitches and enhance the product yield by promoting the cracking and polymerization of the components in the PFO. An atmospheric heat treatment as the second step was used only to synthesize the impregnating pitches from the liquid pitches prepared during the first step. The prepared impregnating pitches had the properties of a commercial petroleum-based impregnating pitch. The impregnation performance was evaluated by HT-XRD and an impregnation test. The HT-XRD results showed changes in the stacked structure of the pitches at the impregnation temperature. The bulk density of the carbon block was increased to 14.3% and the porosity was reduced by 10.3% after the impregnation/recarbonization process. The high reaction temperature during the first step induced the formation of quinoline insoluble (QI) components during the second step of the treatment, and the QI components adversely affected the impregnation process.

Virus Associated Hemophagocytic Syndrome 3례

전동석,황종문,김준식,서은숙,강진무 啓明大學校 醫科大學 1990 계명의대학술지 Vol.9 No.3

Virus associated hemophagocytic syndrome is characterized by a benign generalized histiocytic proliferation with marked hemophagocytosis associated with systemic viral infectioin. The syndrome is a non-neoplastic, potentially reversible process and manifested fever, severe constitutional symptoms, hepatosplenomegaly, and lymphadenopathy, and characterized by laboratory findings of pancytopenia, hemophagocytosis and abnormal liver function test and coagulopathy. Immunosuppressive and cytotoxic therapy are contraindicated because of increasing risk of fatal outcome. The authors experienced three cases of virus associated hemophagocytic syndrome diagnosed by clinical features, bone marrow aspiration and lymph node biopsy. All cases had higt fever, hepatosplenomegaly and lymphoadenopathy and showed granulocytopenia in peripheral blood and phagocytized histiocytes in bone marrow. The brief review of the literatures was made.

사군자탕이 항암제를 투여한 마우스의 면역세포에 미치는 영향

殷載淳,金大根,柳東和,權鎭,洪鍾星,蘇俊魯,全焄,吳贊鎬 우석대학교 의약품개발연구소 1997 藥學硏究誌 Vol.2 No.-

The purpose of this research was to investigate effects of Sa-Kunja-Tang(SKT) on immune cells of antitumor drugs administered mice. The apoptosis and T lymphocytes subpopulation were tested using a flow cytometry, and the proliferation was tested using a MTT assay. The administration of etoposide. vincristine or doxorubicin increased the apoptosis of T-lymphocytes, but the action of doxorubicin was decreased by the administration of SKT. The administration of etoposide or vincristine decreased helper T and cytotoxic T cells population of T lymphocytes, but the action of vincristine was recovered by the administration of SCT. The administration of etoposide, vincristine or doxorubicin decreased the proliferation of T-lymphocytes, but the action of doxorubicin was increased by the administration of SKT. These results suggest that SKT has a regulative function of T-lymphocytes in anti-tumor drugs administered mice.

HIV 감염/AIDS을 처음 진단받은 환자들의 특성과 임상에서 보편적인 HIV 검진의 가치

김종화,김태형,추은주,전민혁,서성우,이용관,최문한 순천향의학연구소 2008 Journal of Soonchunhyang Medical Science Vol.14 No.2

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건강과 생활양식의 상호관련성에 관한 연구

李鍾憲,全銀正 대구효성가톨릭대학교 1996 연구논문집 Vol.52 No.2

Analysis of the health status of our population shows that many people do not feel as healthy as they could feel and that much of this ill-feeling is the result of styles of living that create sickness. Excess smoking, obesity, emotional stress, and environmental pollution are among the lifestyle factors that produce many of today's sicknesses, including heart disease, stroke, cancer, and the emotional upsets that make tranquilizers and ulcer medications among the most frequently prescribed by physicians. The purposes of this study were to identify the life-style and to test their effects on the health. The data were analyzed by using the SAS and the LISREL-7.12. The correlation coefficients among all sub-categories and dependent variables were statistcally significant at the p〈0.001 level. Through the path analysis, this study found that nutrition, fitness, stress, sleeping, hobby, alcohol abuse, excess smoking, drug abuse and medical care had influences on the health. The goodness of fit of the whole model may be judged by means of four measures. ---------------------------------------- Chi-square=1.73(p=0.973) GFI=0.998 AGFI=0.987 RMSR=0.012 ----------------------------------------

당뇨병 및 간병변증 환자에서 발생한 Fusarium verticllioides에 의한 피부 감염 1예

이석종,전영민,원지연,송은섭,최용우,김한욱 예수병원 1998 예수병원학술지 Vol.19 No.-

정상 한국인에서의 경추의 운동범위

박희전,전종세,이필은 대한척추외과학회 2004 대한척추외과학회지 Vol.11 No.2

피부 적용 겔제제의 첨가제에 의한 수분 보유력 평가

이은미,박종희,경기열,전일순,조혜정,지웅길 충남대학교 약학대학 의약품개발연구소 2004 藥學論文集 Vol.19 No.-

The aim of this study was to improve the moisturizing and water retaining effects of a gel containing poloxamer 407, glycerin, sod hyaluronate, sorbo(sorbitol 70%). Topical preparations were formulated as a gel containing different concentration poloxamer 407, glycerin, sod. hyaluronate, sorbo(sorbito1 70%), lipid(ceramide. sphingosine ratio 1:l). We tested a various combination of different additives for the moisturizing effect The water holding capacity of the mixture was measured using a moisture analyzer. In vivo test was carried out on human skin using Skicon-200 and water retaining effect was increased by addition of lipid. Water evaporation test was performed by various concentration of additives and water evaporation characteristics of the preparations were determined using the moisture analyzer. Moisturizing and water retaining effects was increased by adequate combination of various additives with topical gel formulations.

가정환경·스트레스원·스트레스 수준의 상호관련성에 관한 연구

이종헌,전은정 대구효성가톨릭대학교 응용과학연구소 1997 응용과학연구논문집 Vol.6 No.1

The measure of adolescent family environment used here come from well-known sources; that is, sex, age, religion, economy level, mother's occupation, mother's age, birth order, family number. The stress measure is a 45-item standard stress questionnaire discussed in detail else where. The items fall into 7 areas; pysical and psychological stability, other sex friends relationship, self-satisfaction, personal relationship, family relationship, school grade, and headache. The subjects of this study were randomly selected 534 Middle school and High school students who lived in Hayang-up Kyong san-shi Kyongbuk and they interviewed in 1 to 31 May, 1996. The purpose of this study is to investigate the relationships between the stress level of adolescent and family environment and stress factor. The data were analyzed by the statistical methods taking advantage of SAS and LISREL. The result of this study as follows; 1. Through the correlation analysis, correlation coefficients among all sub-categories and stress level were statistically significant at the P〈0.01. 2. Through the path analysis, this study found that physical and psychological stability other sex friends relationship, self-satisfaction, personal relationship, family relationship, school grade, and headache, age, religion, economy level, and mother's occupation, mother's age, family number had influences on stress level. 3. The goodness of fit of the path model may be judged by means of five measures. ◁표 삽입▷(원문을 참조하세요)

사춘기 여학생의 신체발육형태에 관한 고찰

이종헌,전은정 대구효성가톨릭대학교 응용과학연구소 1998 응용과학연구논문집 Vol.6 No.2

The purpose of this study was to find the patterns of height and weight growth were in terms of growth distance, growth velocity, and adolescent growth spurt by PHV age and PWV age. For the study, 275 randomly sampled girl students in Taegu were served as subject. The results were as follws, 1. It was found that the growth distance of height from 7 to 14 years old girls who had an earlier PHV age was superior to later PHV age(P<0.01), and PHV age 9 and 10 showed maturity type. It was found that the growth distance of weight from 7 to 15 years old girls who had an earlier PWV age(P<0.01), and PWV age 9, 10 and 11 showed maturity type. 2. At the age of 15 years old, mean value of height is 158.7 cm in PHV age 9 and is 160.1cm in PHV age 12, and mean value of weight is 53.5kg in PWV age 9 and 48.9kg in PWV age 13. Therefore, growth patterns of earlier PHV age group and Later PWV age group is likely to smaller than later PHV age group and earlier PWV age group. 3. It was found that the patterns of height and weight growth velocity curve showed a one-phase pattern. 4. It was found that the earlier occurance of PHV age and PWV age is related to the amount of adolescent growth spurt.