배양조건에 따른 담자조류의 지방산 조성 변화

장재선 京畿專門大學 1997 京畿專門大學 論文集 Vol.- No.25

Chitinonecetes opilio에서 추출한 chitosan에 대한 물성과 색소 제거

장재선 京畿專門大學 2000 京畿專門大學 論文集 Vol.- No.28

Chitosan was prepared from Chitinonecetes opilio. The aim of this paper was to study the physicochemical properties and dye removal of the chitosan from Chitinonecetes opilio. As the results of this study, the following conclusion were obtained : The content of Chitinonecetes opilio shell and chitosan were analyzed 11.1% and 12.0% moisture, 32.0% and 0.1% crude ash, 25.5% and 43.3% protein, 0.02% and 0.08% currie fat, 31.4% and 44.7% sugar, respectively. The glucosamine, degree of deacetylation and viscosity of the chitosan from Chitinonecetes opilio were 91.1%, 88.0% and 150cps. The removal rate of erythrosine according to varying time were 79.2% on the 10 min, 89.6% on the 20 min, 91.7% on the 30 min, 91.7% on the 40 min, 91.7% on the 30 min and 93.7% on the 60 min. The removal rate of erythrosine according to varying temperature were 85.4%, 91.7% and 79.2% on the 30℃, 50℃ and 70℃, respectively. The removal rate of erythrosine according to varying chitosan amounts remarkably increased.

Filter Medium의 여과특성에 관한 연구

장재선 京畿專門大學 1994 京畿專門大學 論文集 Vol.- No.21

추출조건이 chitosan의 제조에 미치는 영향

장재선 京畿專門大學 2001 京畿專門大學 論文集 Vol.- No.29

Chitosan have been usually prepared by deacetylation of chitin derived from Crustacea species such as lobster and crab with cone. NaOH. However, such treatment not only deacetylation N-acetyl glucosamine residues but also causes degradation of glycosidic bonds of chitins, decreasing their molecular weight. Some fungi contains as components of their cell walls. If chitosans prepared from these fungi have unique properties compared with those derived from Crustacea species, they would be valuable for industrial use. Chitosan was isolated from Aspergillus oryzae. This can be the potential resource for the production of chitosan. The composition of A. oryzae has been investigated. The chemical analysis of A. oryzae was consists chiefly of carbohydrate(42.8%) and protein(42.5%), with smaller amounts of moisture(6.4%), ash(4.9%) and crude fat(3.4%). In the case of isolating of chitosan from A. oryzae, hot alkali extraction(40% NaOH, 120℃, Ihr.) was carried out to remove alkali soluble glucan, protein and lipid. This was followed by acetic acid extraction(0.5 N acetic acid, 95℃, 12hr.) to extract the chitosan. To isolated chitosan from A. oryzae and the affect of the yield of chitosan-glucan complex and glucosamine, the alkaline concentration, the temperature, and the extraction time were examined by ANOVA test. At the 5% significant level, the yield of chitosan-glucan complex was only affected by the extraction time while the glucosamine content was affected by the temperature. The yield of chitosan and chitosan-glucan complex were 5.89%(dry basis) and 20.73%(dry basis) of homogenized A. oryzae, respectively.

Chitosan을 이용한 염료 탈색에 관한 연구

장재선 京畿專門大學 1999 京畿專門大學 論文集 Vol.- No.27

Dyes are released into the environment from industrial wastewater. They are considered to be a pollution problem because of the wide spread into environment with a variety of colors. The decolorization of dyes from synthetic water using chitosan were studied varying temperature, time, chitosan amount and viscosity. The results on decolorization of several dyes were as followed : The decolorization rate of dyes according to varying time were 40% and 23%, 49% and 24%, 57% and 25%, 60% and 28% on the 5, 10, 30, 60 minutes in eosin Y and basic fuchsin, respectively. The decolorization rate of dyes according to varying temperature were 40% and 28%, 57% and 28%, 36% and 10% on the 30℃, 60℃, 90℃ in eosin Y and basic fuchsin, respectively. The decolorization rate of eosin Y according to varying chitosan amount remarkably increased. Otherwise, in basic fuchsin dyes that the results were found to be quite similarly. The decolorization rate of dyes according to varying viscosity were 69% and 30%, 57% and 28%, 59% and 28% on the 9.0cps, 9.5cps, 10.0cps in eosin Y and basic fuchsin, respectively.

여과 케이크의 압축성에 관한 연구

장재선 京畿專門大學 1996 京畿專門大學 論文集 Vol.- No.24

여러 가지 탄소원이 인지질 생합성에 미치는 영향

장재선 京畿專門大學 1998 京畿專門大學 論文集 Vol.- No.26

The changes in contents of phospholipids were analyzed in Chlorella treated with carbon sources (glucose, sucrose, raffinose) during the cultures. The content changes of PC were decreased average 99% in glucose treatment, but increased average 200% in sucrose treatment, 182% in raffinose treatment compared with the control. The PG content were markedly increased average 302%, 138% and 102% in glucose, sucrose and raffinose treatment. The content changes of PG were increased average 222%, 244% and 129% in glucose, sucrose and raffinose treatment. The average increase was 2-5 times. The PI content were increased average 246% in glucose treatment, 289% in sucrose treatment, 304% in raffinose treatment compared with the control. The average increase was 5-6 times.

고감도 CaSO_4 : Dy TL 분말의 TL 특성 및 고감도 TL 소자 제작 Dy TL powder and development of high sensitivity CaSO_4 Dy TL pellet

양정선,박재우,김두영,김장렬,장시영 제주대학교 방사능이용연구소 2002 연구보고 Vol.16 No.-

CaSO_4 : Dy series TL material is widely used as a personal dosimeter because of its high sensitivity to radiation. KAERI(Korea Atomic Energy Research Institute) has been produced CaSO_4 TL powder activated by Dy(rare earth elements) for several years and continually tried to improve its sensitivity having more than that of commercialized Teledyne CaSO_4 : Dy TL powders(USA). The TL powder is prepared by adding 0.1mol% Dy as an activator and by the acid evaporation method at first. And new step of washing this powder by distil-water is appended to separate non-crystalized powder in the initial crystal of CaSO_4 : Dy powder. CaSO_4 : Dy crystal TL powder which is produced by applying this new method has higer sensitivity than before washing step, and it has also higher sensitivity than that of Teledyne CaSO_4 : Dy TL powder. This CaSO_4 : Dy TL powder shows good TL characteristics such as dose response, energy response and fading. It is not possible to make solid detectors of only CaSO_4 : Dy TL phosphor without any binding material. Until now widely used sintered pellets. which were made from a mixture of CaSO_4 : Dy TL phosphor and Teflon. But, due to reduction in content of CaSO_4 : Dy TL phosphor in pellets(15∼20wt%) the TL sensitivity of pellets was reduced correspondingly. To variously use the CaSO_4 : Dy TL phosphor, research for preparing detectors by mixing CaSO_4 : Dy TL phosphor with different binding substances has been conductedThis paper described development of a new type of CaSO_4 : Dy pellets by using P-compounds as a bonding material(KCT-300), and compared the TL sensitivity with that of the commercialized Teledyne CaSO_4 : Dy pellets. Sensitivity of a new developed KCT-300 shows about 6 times than Teledyne ones, and can be used to measure very low radiation dose.

Li 화합물을 첨가한 CaSO₄:Dy 열중성자 측정용 TLD 소자 개발

양정선,김두영,박재우,김장렬,장시영 제주대학교 방사능이용연구소 2003 연구보고 Vol.17 No.-

Personal neutron dosimetry is quite a difficult area because a neutron is always accompanied with gamma radiation, which is required of a capability for mixed field dosimetry. CaSO₄:Dy phosphor is known to have a very high sensitivity to gamma, but the neutron capture cross section of the constituents of CaSO₄:Dy are so small that the interactions between the thermal neutron and the phosphor are rare. One method to improve the neutron interaction is by introducing an impurity ion with a large thermal neutron captures cross section into the phosphor to act as a neutron target centre such as 6Li. In neutron-gamma mixed radiation fields, if two detectors for the 6Li-7Li compounds embedded CaSO₄:Dy TL pellets are used, a 6Li-compound embedded pellet can detect the neutron and gamma radiation together, and the other pellet can only detect the gamma radiation. Recently Korea Atomic Energy Research Institute (KEARI) has developed a new type of CaSO₄:Dy TL materials embedded with phosphorous (KCT-300) to detect beta and gamma radiation with a very high sensitivity[1]. This paper presents the development of CaSO₄:Dy TL pellets embedded with 6Li compound for a thermal neutron measurement, and the detection method of the neutron and gamma dose in mixed fields with CaSO₄:Dy TL pellets embedded with a 6Li compound(KCT-306) and CaSO₄:Dy TL pellets embedded with a 7Li compound(KCT-307) is introduced. The net neutron sensitivity of CaSO₄:Dy TL pellets embedded with 6Li compound developed in this study is higher than that of the TLD-600 (Harshaw Co.) dosimeter which is available in the open market.

간호사들에서 월경전불쾌기분장애와 삶의 질, 사회직업기능 및 장애 간의 연관성

김선영,김재민,김웅장,양수진,김성완,신일선,윤진상 大韓神經精神醫學會 2008 신경정신의학 Vol.47 No.1

Objectives : This study aimed to investigate the prospective associations of premenstrual dysphoric disorder (PMDD) with quality of life, socio-occupational function and disability. Methods : 170 nurses were recruited 6om two general hospitals. Interviews were made at baseline and at four follow-up points (two mid follicular phases and two late luteal phases ofthe two consecutive menstrual cycles). The baseline evaluation Consis-ted of sociodemographic characteristics and menstmal history. PMDD was diagnosed by DSM-IV criteria after observation of the two menstrual cycles. The follow-up evaluations were consisted ofthe World Health Organization Quality of Life-Brief form, the Social and Occupational Functioning Assessment Scale, and the World Health Organization Disability Assessment Scale-II. Results : PMDD was detected 15 (8.8%) of 170 participants. The PMDD group showed significantly worse quality of life and socio-occupational functioning than the none-PMDD group particularly at the late luteal phases. No significant differences were found in sociodemographic characteristics and menstrual history between those with and without PMDD. Conclusion : PMDD was prospectively associated with worse quality of life and socio-occupational functioning in this study group.