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박정훈,박상도,남성찬,이해정 한국화학공학회 2004 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.42 No.1
생성물 수율과 반응성을 고려하여 선정한 원료를 이용하여 수열합성법으로 BaTiO_(3) 미세 분말을 제조하였으며 합성시 반응 원료, 온도 및 시간 변화에 따른 영향을 조사하였다. Ba(NO_(3))_(2)와 TiO_(2)ㆍxH_(2)O를 출발물질로 사용할 경우는 광화제 없이도 80℃부터 BaTiO_(3)가 합성되었다. BaTio_(3)의 합성은 반응혼합물의 pH가 높을수록 유리하였으며 전화율은 반응시간보다는 반응온도에 더 큰 영향을 받았다. 이상의 실험 결과로부터 BaTiO_(3) 입자는 수열합성시 용액 중 OH^(-)기의 친핵 공격에 의한 함수 티타니아의 용해와 Ba이온과의 탈수 반응을 통한 핵생성 및 성장 경로를 통해 합성된다고 제안하였다. BaTiO_(3) fine powder was prepared by hydrothermal synthesis with various precursor materials selected in view of yield and reactivity. The effect of reaction temperature, time and raw material was investigated in the above process. While a(NO₃)₂ and TiO₃·xH_(2)O were used as starting material, it was not possible to prepare BaTiO_(3) without mineralizer, however the same can be synthesized at 80℃ without mineralizer using Ba(OH_(2))·8H₃O and TiO₃·xH₃O. The synthesis of BaTiO₃ was favored by higher pH of the reaction solution and conversion was found dependent on the reaction temperature instead of time. Experimental data suggested that BaTiO₃ seemed to be synthesized hydrothermally through reaction pathway that included dissolution of hydrous titania by nucleophilic attack of OH^(-) group in aqueous medium, nucleation by dehydration between Ba ion and titanium complex dissolved and the growth of nuclei.
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울산지역 초, 중, 고등학생들의 자기 체형에 대한 인식 및 불만족도에 대한 조사
홍찬의,홍성완,정철주,이동진,최광해 영남대학교 의과대학 2008 Yeungnam University Journal of Medicine Vol.25 No.2
Background : In this study, we examined body image perception and dissatisfaction with weight and height in children and adolescents, according to age and body mass index. Additionally, we compared our findings with those of previous studies concerning eating disorders. Materials and Methods : In July and August 2008, 1,501 students were sampled from elementary, middle, and high schools in Ulsan and assessed using self-completion questionnaires. We used the Korean version of the Eating Attitude Test-26 (EAT-26) to screen for eating risk groups Participants were stratified by grade, gender, and body mass index. Results : 1) Dissatisfaction with height, weight, and body image was greater in the older group. 2) Dissatisfaction with weight and body image was greater in the heavier group. 3) EAT-26 scores and the number of individuals at high risk for eating disorders were higher in the female group than in the male group. Conclusion : The EAT-26 score in this study was similar to those found in Previous Westem studies. 2) There were a number of high-risk individuals in the female group, with a tendency toward earlier Presentation. Continuous health management and prevention programs are required.
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의류 중의 미생물에 대한 소비자의 지식과 세탁습관 실태조사 분석
최해운,정찬진,박명자 服飾文化學會 2002 服飾文化硏究 Vol.10 No.6
Microorganisms living in clothing cause damage to fabric as well as unhygienic conditions with unpleasant odor for wearers. Removal or growth of microorganisms are affected by the conditions during washing and storage. The purpose of this research was to study the consumer's knowledge and habits in laundering with respect to microorganisms in clothing. For survey method, questionnaires were administered to 580 housewives, age of 20~60s living in Seoul. Employing 479 respondents, the data were analyzed by using deseriptive statistics. The results are as follows; The level of knowledge about microorganisms of clothing was high in general, but wasn't expert level. Many people had experienced damages of textiles, clothing and unpleasant odor due to microorganisms. Fabric softeners and bleaches were rarely used for disinfection but usually used for antistatic. whitening or removal of stains. There was no relationship between laundering habits the knowledge of microorganism, and experience of clothing damage by microorganism
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홍나영,유혜경,이주현,석혜정,신혜성,김찬주 服飾文化學會 2003 服飾文化硏究 Vol.11 No.3
The main purpose of this exploratory research was to examine the characteristics of consumers who patronize natural-dyed clothes and their perceptions regarding natural-dyed clothes. Thirty three participants who have worn natural-dyed clothes were interviewed for the study. They were asked about styles and price of natural-dyed clothes they owned, their evaluation on them, and the lifestyles of themselves. Existence of subculture among the interviewes and its characteristics were also probed. The results indicated that natural-dyed clothes are relatively high-priced, mostly of modified hanbok style, and became popular in recent years. Interviewees frequently mentioned uniqueness and comfort as the main benefits of natural-dyed clothes, and expressed dissatisfaction regarding color fastness, easy care and problem of coordination. The consumers of natural-dyed clothes appeared to have strong preferences for environment conservation and Korean traditional culture. They also seemed to form a subcultural group who have commonality in their involvement in Korean cultural activities, mainly tea ceremony.
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문철웅,정종훈,박천국,이승일,배학연,장경식,김만우,정춘해,홍순표,이병래,김호중 朝鮮大學校 附設 醫學硏究所 1993 The Medical Journal of Chosun University Vol.18 No.1
Renal ischemia is one of the most common causes of acute renal failure. Four factors related to the pathogenesis of acute renal failure are vasoconstriction, decreased glomerular filtration rate, tubular back leak of filtrate, and intratubular obstruction. The cellular response to renal ischemic insults include decreased content of adenosine trihosphate, lipid peroxidation induced membrane degradation, alteration in cellular pH, and calcium or phospholipase induced mitochondrial dysfunction. Much attention has been given to the role of increased cellular calcium as a pathogenetic contributor to cell injury during ischemia. Author studied the protective effects of calcium antagonists on cellular injury during renal ischemia in rat. To investigate the protective role of these agents, author measured the amount of malondialdehyde(MDA) and the enzyme activities of free radical scarvengers-superoxide dismutase(SOD), catalase and glutathione peroxidase from non-pretreated group and calcium antagonists pretreated groups in control, ischemia and reflow subgroups. The results were summerized as follows: 1) The amount of MDA in non-pretreated group was higher in the reflow compared with the control(<p<0.01). But, in all pretreated groups, there was no statistically difference in the amount of MDA. 2) The SOD activity in non-pretreated group was lower in both the ischemia and the reflow compared with the control (P<0.05). But, in both verapamil and trifluoperazine-pretreated groups, there was no statistically difference in the SOD activity. 3) Both catalase and glutathione peroxidase activities in non-pretreated group were lower in both the ischemia and the reflow compared with the control (P<0.05). But in all pretreated groups, there was no statically difference in both catalase and glutathione peroxidase activities. These results suggest that free radical mediated ischemic injury by renal artery clamp in rat can be protected by intraperitoneal pretreatment with calcium antagonists. As trifluoperazine has a protective effect in renal ischemia, the calcium activated calmodulin dependent enzyme may play a role in renal ischemic injury.
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( Hae Jung Song ),( Jin Oh Kim ),( Soo Hoon Eun ),( Young Deok Cho ),( In Seop Jung ),( Young Koog Cheon ),( Jong Ho Moon ),( Joon Seong Lee ),( Moon Sung Lee ),( Chan Sup Shim ),( Boo Sung Kim ),( So 대한소화기학회 2007 Gut and Liver Vol.1 No.1
Background/Aims: Distinguishing benign and malignant lymph nodes by the findings of endoscopic ultrasonography (EUS) is still controversial. We tried to evaluate EUS findings of benign mediastinal and abdominal lymphadenopathy (BLAP) confirmed by EUS-guided fine needle aspiration (FNA). Methods: A total of 37 patients with enlarged mediastinal or abdominal lymph nodes (diameter ≥1 cm) were enrolled and EUS-FNA was performed. Final diagnosis was based on FNA cytology and follow up imaging studies (CT scans or EUS). Results: Thirteen patients were confirmed to have BLAP by EUS-FNA. Causes of BLAP were as follows; (i) extrapulmonary tuberculosis in six cases including patients with postoperative states due to cervical cancer and advanced gastric cancer, (ii) Kikuchi disease in one case, (iii) hypereosinophilic syndrome in one case, (iv) reactive hyperplasia in five cases including patients with postoperative states due to thyroid cancer, lung cancer, and EGC with ESD. EUS findings of BLAP revealed that median lymph node size was 24.7 mm. Lymph nodes were oval or round shaped in 9 cases, sharp borders in 9 cases, hypoechoic echo pattern in 7 cases, heterogenous internal echo pattern in 7 cases. Other findings included internal septation, calcification, multiplicity, attachment to the gastrointestinal tract wall, and conglomeration. Conclusions: EUS findings of BLAP were not different from those of malignant lymphadenopathy previously reported in other studies. (Gut and Liver 2007;1:68-73)
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군소 ( Aplysia kurodai ) 의 중추신경계로부터 myomodulin A 와 E 의 정제
김찬희(Chan Hee Kim),서해점(Hae Jeom Seo),황은영(Eun Young Hwang),김은정(Eun Jung Kim),고혜진(Hye Jin Go),김인혜(In Hye Kim),서정길(Jung Kil Seo),문정혜(Jung Hye Moon),허민도(Min Do Huh),박남규(Nam Gyu Park) 한국수산과학회 2001 한국수산과학회지 Vol.34 No.3
군소의 중추신경계로부터 myomodulin A (MMA)과 myomodlin E (MME)의 정제에 대해 보고하고자 한다. 500마리 군소의 중추신경계를 산조건으로 추출한 후 4종류의 HPLC column system에 적용하여 두가지 신경성 펩타이드를 정제하였다. HPLC 분리과정에서 얻어진 모든 분획의 활성을 조사하기 위하여 bioassay system으로 진주담치 (Mytilis edulis)의 ABRM을 이용하였다. 최종 정제된 신경성 펩타이드는 Edman 분해법을 이용한 아미노산 서열 분석기, 질량분석기와 화학합성을 통해 완전한 일차구조를 밝힐 수 있었다. 정제한 MMA와 MME의 일차구조는 각각 Pro-Met-Ser-Met-Leu-Arg-Leu-NH₂(847.41 Da)과 Gly-Leu-Gln-Met-Leu-Arg-Leu-NH₂, (830.50 Da) 이었다. 또한 이들 합성 펩타이드는 진주담치의 ABRM에 대해 phasic contration의 조절활성을 나타내었다. This paper reports the purification of myomodulin A (MMA) and myomodulin E (MME) from the sea hare. The central nervous systems of 500 sea hare were extracted in an acidified solvent, after which four HPLC column systems were used to obtain pure peptides. The phasic contraction bioassay using a Mytilus edulis anterior byssus retractor muscle (ABRM) was applied to monitor all collected fractions. The pure peptides were submitted to Edman degradation based automated microsequencing. Mass spectrometry and chemical synthesis confirmed the sequence. The primary structures of MMA and MME were Pro-Met-Ser-Met-Leu-Arg-Leu-NH₂(847.41 Da) and Gly-Leu-Gln-Met-Leu-Arg-Leu-NH₂(830.50 Da), respectively. Synthetic peptides showed a modulating activity of phasic contraction in the ABRM of Mytilus edulis.
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Kumar, Rajesh,Oh, Jung-Hwan,Kim, Hyun-Jun,Jung, Jung-Hwan,Jung, Chan-Ho,Hong, Won G.,Kim, Hae-Jin,Park, Jeong-Young,Oh, Il-Kwon American Chemical Society 2015 ACS NANO Vol.9 No.7
<P>Atomic-scale defects on carbon nanostructures have been considered as detrimental factors and critical problems to be eliminated in order to fully utilize their intrinsic material properties such as ultrahigh mechanical stiffness and electrical conductivity. However, defects that can be intentionally controlled through chemical and physical treatments are reasonably expected to bring benefits in various practical engineering applications such as desalination thin membranes, photochemical catalysts, and energy storage materials. Herein, we report a defect-engineered self-assembly procedure to produce a three-dimensionally nanohole-structured and palladium-embedded porous graphene hetero-nanostructure having ultrahigh hydrogen storage and CO oxidation multifunctionalities. Under multistep microwave reactions, agglomerated palladium nanoparticles having diameters of ∼10 nm produce physical nanoholes in the basal-plane structure of graphene sheets, while much smaller palladium nanoparticles are readily impregnated inside graphene layers and bonded on graphene surfaces. The present results show that the defect-engineered hetero-nanostructure has a ∼5.4 wt % hydrogen storage capacity under 7.5 MPa and CO oxidation catalytic activity at 190 °C. The defect-laden graphene can be highly functionalized for multipurpose applications such as molecule absorption, electrochemical energy storage, and catalytic activity, resulting in a pathway to nanoengineering based on underlying atomic scale and physical defects.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2015/ancac3.2015.9.issue-7/acsnano.5b02337/production/images/medium/nn-2015-02337d_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn5b02337'>ACS Electronic Supporting Info</A></P>
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