Determination of the optimum porosity for 2‑CEES adsorption by activated carbon fiber from various precursors

Hye‑Min Lee,Byeong‑Hoon Lee,Ju‑Hwan Kim,Kay‑Hyeok An,Soo‑Jin Park,Byung‑Joo Kim 한국탄소학회 2019 Carbon Letters Vol.29 No.6

In this study, we prepared ACFs with a high specific surface area from various precursors (rayon, pitch, and oxidized polyacrylonitrile-based fibers) by a steam-activation technique and investigated the effects of the micropore and mesopore fraction on 2-CEES adsorption behaviors. The activation time was precisely controlled so that the activation yield was in the range of 35–40% to ensure the mechanical properties of the ACFs. The N2 adsorption isotherm characteristics at 77K were confirmed by Brunauer–Emmett–Teller, Barrett–Joyner–Halenda and non-local density functional theory equations. The adsorption capacities of the ACF were measured by breakthrough experiments in the gas phase (750 μg/mL of 2-CEES in N2 flow). The removal efficiency of the ACFs was evaluated and compared with that of AC. From the results, specific surface areas and total pore volume of the ACF were determined to be 1380–1670 m2/g and 0.61–0.82 cm3/g, respectively. It was also observed that various pore characteristics of ACF were found to be dependent on crystallite structure of each precursor. The break through time (C/C0 = 0.10) was in the order of Oxi-Pan-H-9-2 < Saratoga AC < Rayon-H-9-3 < Pitch-H-9-4. This indicates that 2-CEES adsorption capacity could be a function not only of specific surface area or total pore volume, but also of sub-mesopore volume fraction in the range of 1.5–2.5 nm of adsorbents.

브루셀라균에 노출된 미생물 검사실 직원들에 대한 예방적 항생제 요법과 혈청학적 추적검사

이창섭,이혜수,이재현,박진희,최영실,황규잠,이흥범 대한감염학회 2008 감염과 화학요법 Vol.40 No.2

The aerozolization is one of possible Brucella transmission mechanisms, particularly in air-borne exposed laboratory workers. In this study, seven laboratory workers were potentially exposed to B. abortus via aerosols. Two laboratory workers who sniffed an agar plate several times were considered to be at high risk for acquiring the disease, 5 workers who did not work directly with the strain were be considered at low risk of infection. Prophylactic antibiotics of doxycycline 200 mg/day and rifampin 600 mg/day were offered for 6 weeks in high risk workers and 3 weeks for low risk workers respectively. Enrolled workers were advised to check for serological testing of Brucella species every 3 weeks during a total period of 12 weeks. Compliance with taking medicine was 57.1% (4/7) and compliance for completing the serological tests was 85.7% (6/7). None of the laboratory workers developed clinical disease or tested positive serologically during 3 months of seroloaical testing and 1 year of clinical follow-up.

Reply to comment on “Combination of cupric ion with hydroxylamine and hydrogen peroxide for the control of bacterial biofilms on RO membranes by Hye-Jin Lee, Hyung-Eun Kim, Changha Lee [Water Research 110, 2017, 83–90]”

Lee, Hye-Jin,Lee, Changha Pergamon Press 2017 Water research Vol.118 No.-

<P><B>Highlights</B></P> <P> <UL> <LI> Procedures for reaction quenching used in our recent study were clarified. </LI> <LI> Bacterial inactivation by the pH drop was negligible in our experiments. </LI> <LI> Bacterial inactivation by Cu(II)/sulfite was prevented in the presence of EDTA. </LI> </UL> </P>

휴대폰 카메라용 자동초점 구동기의 충격해석

이성민,김봉석,송준호,이수훈,이혜진,이문구,송준엽,이창우 한국공작기계학회 2008 한국공작기계학회 춘계학술대회논문집 Vol.2008 No.-

Recently, the robustness against daily impact is important according to portablization and downsizing of mobile electronics. Especially, almost parts of cellular phone should undergo drop test when they fall 1.5 m above ground. This test simulates the case when cellular phone slips through user's fingers while he is talking on the phone. This paper studies a drop test of auto focusing (AF) actuator for camera module in cellular phone. This component is composed of voice coil motor (VCM) as an actuator and leaf spring as a guide and suspension. The leaf spring's deformation is essential for the test because its permanent distortion disables the focusing, and then, a high quality photograph cannot be obtained. Up to now the drop test has been carried out after fabricating real AF actuator. We propose a dropt test model which simulates the drop test based on finite element analysis. This model makes us enable investigate the stress acting on the clamping and curved parts of leaf spring. Stress over Von Mises criterion lets the spring deformed permanently, and then AF actuator malfunctioned, It helps us to design and modify AF actuator without manufacturing the real product. And also, it saves the time and cost for the development of new products.

췌장 선방세포암 1예

이화정,지준호,박승찬,박정철,최은정,서혜진,이원식,이정림,배병조,손경락,이경희 영남대학교 의과대학 2008 Yeungnam University Journal of Medicine Vol.25 No.2

Acinar cell carcinoma is a rare tumor that represents 1~2% of al1 pancreatic cancers. Clinical and radiologic findings are inconclusive in this disease Acinar cell carcinoma is characterized by rapid progression and early metastasis, which lead to its poor prognosis. A 41-year-o1d man was admitted to our hospital for abdominal pain. Abdominal computed tomography (CT) and positron emission tomography-computed tomography (PET-CT) showed a splenic mass, which was being invaded by a pancreatic tail mass and which had increased ^(18)F-fluorodeoxyglucose (FDG) uptake Primary radical distal pancreatectomy and splenectomy were performed. Pathologic findings revealed an acinar cell carcinoma of the Pancreas The patient underwent a total gastrectomy three months later because of gastric recurrence Four months later, multiple hepatic metastases were discovered, and the patient underwent a left hepatectomy During treatment with capecitabine, there was no evidence of tumor progression for 14 months. We report a case of metastatic pancreatic acinar cell carcinoma, which did not progress for an extended period while the patient was being treated with capecitabme.

Plasma arc 광원을 이용한 과산화수소의 치아미백 효과

이혜진(Hye-Jin Lee1),김민영(Min-Young Kim),양달님(Dal-Nim Yang) 한국구강보건과학회 2016 한국구강보건과학회지 Vol.4 No.2

The purpose of this study was to compare of the effectiveness of tooth bleaching with different hydrogen peroxide concentrations and light activated plasma arc on extracted premolar tooth The 100 specimens were stained using the CEYLON black tea. Among of them 60 specimens were selected by lightness values (*L) and were classified into five groups (n=12): Group Ⅰ, Distilled water; Group Ⅱ, 5% hydrogen peroxide gel ; GroupⅢ, 5% hydrogen peroxide+plasma arc; Group Ⅳ, 15% hydrogen peroxide; GroupⅤ, 15% hydrogen peroxide +plasma arc. Specimens were bleached until 4 times (60 min). The color change (ΔE*) of specimens was measured after stained and each bleaching time by Shade Eye-NCC. The samples were analyzed qualitatively by evaluating morphological changes in the SEM images, microhardness and quantitatively by using roughness parameters (Ra). The acquired data was analyzed by paired t-test and one-way ANOVA followed by Tukey s multiple test for variable at a 0.05 significant level. The color changes (ΔE*) significantly increased after bleaching in all groups (p<0.05). Microhardness (VHN) significant decreased after bleaching in all groups AFM and SME images exhibited that the surfaces of specimens became roughed after bleaching. Especially, Group of hydrogen peroxide with plasma arc showed more rougher than hydrogen peroxide without plasma arc in SEM. This study suggested that hydrogen peroxide with plasma arc may be better tooth whitening effects than only hydrogen peroxide.

김남천의 『사랑의 水族館』에 나타난 '현대'의 성격과 '현대청년'

이혜진(Lee Hye-Jin) 부산대학교 한국민족문화연구소 2006 한국민족문화 Vol.27 No.-

Aquarium of Love written by Nam-cheon Kim is a novel that was published serially from 1939 to 1940 in Chosun Ilbo. It features the characteristics of modern times that isolates the main character. The author also delineated them in his previous work. While Gwang-joon Kim, brother of Gwang-ho Kim, who ended up in dying of acute tuberculosis after abandoning his old-style wife and cohabiting together with a barmaid was .1 prototype of previous generation that implied the background of the times when the ideology of the past socialists collapsed, Gwang-ho Kim, the main character of this work, represents "the characteristics of modern times". Nam-cheon Kim already showed his interest in the way of the world and public morals through the theories of complaint literature and view literature. Accordingly, his delineation of the characters including Gwang-ho Kim and Gyeong'-hee Lee is just a complaint about and view of the then social reality, and the features of their living were the epitome of the social reality of the times. In this work, Nam-cheon Kim explores the love, belief, the way of the world, and public morals of young people who represent "the characteristics of the times" and are represented by Gwang-ho Kim and Gyeong-hee Lee. Outwardly, however, the story progresses with a focus on the plot of conflicts and reconciliation that arise in the course of love and marriage of Gwan-ho Kim and Gyeong-hee Lee. Furthermore, since the real time from 1939 to 1940 and the internal time of the story coincide, the work fully reproduces the sense of reality of the times. The reason why Nam-cheon Kim positively delineates the new senses of "modernized young people" is that vogue is closely associated with productive relationship and it is a means to sensitively view the public morals of 'modern times'.

노화로 인한 신체적 기능 쇠퇴와 고령자를 위한 욕실 디자인 가이드라인 관계 연구

이연숙(Lee, Yeun-Sook),임현진(Lim, Hyun-Jin),이지혜(Lee, Ji-Hye),안창헌(Ahn, Chang-Houn) 한국실내디자인학회 2013 한국실내디자인학회논문집 Vol.22 No.5

Advancement toward aging society has presented the importance of house planning in consideration of the elderly, increasing the necessity of such planning. Therefore the importance of indoor design guideline for elderly houses has been stressed and the understanding of the aging in regard to this trend will create more mature spaces. In line with this trend the purpose of this study is to study the medical factors related with bathroom interior design guidelines of the existing elderly houses from the viewpoint of deteriorating physical functions due to aging process. In order to research the deterioration of physical functions due to aging literatures of medical and exercise physiology were used and concerning the existing bathroom design guidelines for the aged people, the guideline items of behavior facilitation, physiological maintenance and perceptual maintenance aspects out of Murtha & Lee’s user benefit criteria(1976) related with physical functions were selected to research in relation with the knowledge about the deterioration phenomena of physical functions. Physical aging and deterioration aspects were classified from the viewpoint of musculoskeletal disorder, cardiovascular disorder, respiratory disorder, gastronomy disorder, urology disorder, somatosensory disorder, endocrine disorder, immune disorder, nervous disorder and skin diseases and these were utilized in interpreting total 100 items of bathroom design guideline. Because bathroom is the space where many physical movements are done, it had the closest relationship with the deterioration of musculoskeletal health in general and as bathroom is the space where people use water and feel the difference in temperature and moisture more than other spaces, deterioration of skin and somatosensory health had the next closest relationship. The result of this study revealed that regarding the deterioration of physical functions of the elderly people in aspect of their perceptibility as designers will design creatively and sincerely based on its relationship with nervous system in future, the result of this study will be used to develop better spatial designs efficiently to meet for the aging society.

노인의 영적 간호요구

최미혜,김경희,김귀옥,김기숙,김수강,김정신,김춘숙,노흥진,박지연,성혜연,오명선,이선희,이원옥,이윤영,이현수,장명재,차혜경,채정선,홍상희 중앙대학교 의과대학 간호학과 간호과학연구소 2001 중앙간호논문집 Vol.5 No.1

This study was designed to exam the aged's needs for spiritual nursing care. The purpose was to serve as a basis for the development of spiritual nursing practice. The major findings are as follows : 1. The degree of needs for spiritual nursing care as area was that needs of love and relationship mean 22.0, needs of meaning and object mean 28.2, needs of forgiving mean 13.5. Total needs for spiritual nursing care mean 63.7, which was on the upper middle level. The needs of meaning and object was rated highest. 2. Among the general characteristics of the subjects, needs of love and relatiohship wasn't significanlty different. 3. Among the general characteristics of the subjects, needs of meaning and object was significantly different according to two factors : age(F=7.260, p=0.001), religion(F=5.275, p=0.001). Higher needs of meaning and object was possessed by the older than the younger, by the one who have religion than the other. 4. Among the general characteristics of the subjects, four factors made a significantly difference to needs of forgiving : sex(t=-2.851, p=0.006), age(F=8.201, p=0.001), religion(F=6.928, p=0.000), disease(t=2.327, p=0.024). Higher needs of forgiving was possessed by man than woman, by the older than the younger, by the one who have religion than the other, by the one who have disease than the other.

위선암에 병발된 혈액학적 합병증 1예 : 백적아구증, 파종성 혈관내 응고, 미세 맥관성 용혈성 빈혈

정혜경,김희진,이선영,최진혁,이순남,이홍수,정화순,한운섭 梨花女子大學校 醫科大學 醫科學硏究所 1994 EMJ (Ewha medical journal) Vol.17 No.2

Among the hematologic complications of solid tumors, leukoerythroblastosis, DIO and MAHA have been known to be clinically significant According to the recent increasing incidence of cancer, these hematologic complications have been reported frequently. However, the simutaneous developement of such manifestations is rare. Recently, we have experienced a patient with gastric adenocarcinoma in which case severe bleeding tendency were observed and laboratory studies including bone marrow examination demonstrated the findings of leukoerythroblastosis, DIC and MAHA. She died of upper gastrointestinal bleeding despite the supportive care such as vlood transfusions. We should give attention to the findings of peripheral golld smear for the patient with malignancy and it is mandatory for therapeutic plan to perform bone marrow examination if the above mentioned hemorrhagic complications are suspected.