가열처리에 의한 단감의 이화학적 특성

손규목,김광호,성태수,김종현,신동주,정지영,배영일 한국식품영양학회 2002 韓國食品營養學會誌 Vol.15 No.2

단감의 기능성 소재 및 기호성이 우수한 부원료로서의 이용 가능성을 확인하기 위하여 단감새옥를 전처리별 즉, 열처리 온도 (25℃, 75℃ 및 95℃) 에서 NaCl (0, 1, 3%) 농도별로 침적 (1, 5분) 하여 동결건조한 시료구를 대상으로 탄닌, 비타민 C, 색도 및 조직감 등을 분석한 결과는 다음과 같다. 탄닌 성분은 열처리 온도, NaCl 농도 및 침적시간이 증가할수록 탄닌함량이 감소하는 경향을 나타내었으며, 특히, 대조구 (420 mg%) 에 비해 95℃에서 1% 및 3% NaCl 농도에 5분간 침적시 각각 228 및 198 mg%로 감소하였다. 비타민 C 함량은 대조구 (122.4 mg%)에 비해 95℃에서 3% NaCl 농도에 5분간 침적시 75.8 mg% 로 감소하였고, 색도는 열처리 온도, NaCl 농도 및 침적시간이 증가할수록 L(명도) 및 b(황색)값이 뚜렷하게 증가한 반면, a(적색도) 값은 감소하였고, ??E 값은 증가하여 처리조건이 가중될수록 색의 변화가 진행됨을 알 수 있었다. 단감껍질과 전처리한 시료 (95℃, 1% NaCl, 5 분)의 flavonol 함량은 껍질에 myricetin(2.0 ㎍/g), quercetin (34. 5 ㎍/g) 및 kaemferol (1.1 ㎍/g) 성분이 검출되었고, 전처리한 시료는 myricetin (9.5 ㎍/g), quercetin (5.5 ㎍/g)이 검출되었다. 조직감은 대조구에 비해 전처리 (95℃, 1% NaCl, 5분) 한 시료에서 부서짐성, 응집성, 점성 및 씹힘성이 우수하였다. 관능검사는 95℃에서 1% NaCl에 5분 및 3% NaCl 농도에 1부간 침지한 시료가 좋은 평가를 받았다. Sweet persimmon were tested in order to identify their use as secondary material which is excellent in function and taste as food. Samples were soaked for 1 and 5 min with NaCl concentration (0, 1 and 3%) at a certain heating temperature (25, 75 and 9r℃), and then tannin, vitamin C, flavonol, color intensity, sensory test and textural properties were analyzed. The results of the analyses were as follows. Tannins were decreased as heating temperature, NaCl concentration and soaking time were increased, especially, that the control was 420 mg% but decreased 228 and 198 mg% at 95℃ (1 and 3% NaCl concentration) for 5 min, soaked in each. Vitamin C content also decreased more in higher temperature and NaCl concentration than control (122.4 mg%). Color intensity showed higher value in L and b than in heating temperature, NaCl concentration and soaked time longer remarkably, but a value decreased. The peel of sweet persimmons was analyzed myricetin (2.0 ㎍/g), quercetin (34.5 ㎍/g) and kaemperaol (1.1 ㎍/g), but in pre-treatment sample ( 95℃, 1% NaCl concentration and 5 min, soaked ) was showed higher myricetin (9.5 ㎍/g) and quercetin (5.5 ㎍/g). Textural properties were good in pre-treatment sample ( 95℃, 1% NaCl concentration and 5 min, soaked) such as brittleness, cohesiveness, gumminess and chewiness. In sensory analysis, the pre-treatment samples (95℃, 1% NaCl concentration and 5 min, soaked and 95℃, 3% NaCl concentration and 1 min, soaked) were showed higher point than others.

레이저 인터페로메타를 이용한 드릴링 머신의 틸팅에 관한 연구

이승수,손영지,장성규,전언찬 동아대학교 공과대학부설 생산기술연구소 1996 生産技術硏究所硏究論文集 Vol.1 No.2

This paper describes tilt angle measurement method. This method measures tilt angle of drilling machine using laser interferometer with simple sliding linear bearing. Measurement method is next orders. First, measurement position is considered pointed contact of two probes. And revolution of drill axis deliver pointed contact of probe. Second, so laser interferometer attach on sliding linear bearing, moving of probe influence laser reflector. And laser program displays this vibration of laser reflector. Namely, this vibration is tilt factor. A lot of error factor have an effect on accuracy to measurement of linear, angular, and so on. But this paper ignores some error factor, because these error festor is very smaller than tilt angle factor which we had been measuring values.

요로조영상에서 요관폐색 및 음영결손을 보인 환자에서의 요관경검사

염규영,하용원,노안식,손성용,김진겸,설종구 충남대학교 의과대학 지역사회의학연구소 2000 충남의대잡지 Vol.27 No.2

Purpose: To evaluate the clinical value of ureteroscopy for the ureteral filling defect or obstruction on the excretory or retrograde pyelogram(RGP). Materials and Methods: The 72 patients with filling defect or intrinsic obstruction ureteral lesion on the excretory urogram or RGP underwent ureteroscopy to examine and treat the lesions. We used the 9.5Fr. or 11.5Fr. rigid ureteroscope with 5Fr. working channel. Results: The results were as follows; I. Among the 72 patients, 39 were male and 33were female. The mean age of patient was 45.7 years. 2. Ureteroscopy was successfully performed in 70 cases(97%) out of 72. In 2 cases, the advance of ureteroscope was failed. 3. Among 70 successful cases, ureteroscopy revealed 45 radiolucent stones, 9 ureteral stricture, 2 ureteral TCC. I metastatic tumor, 3 blood clot, each case of ureteral polyp, epithelial hyperplasia and Von-Brunn's nest. In 7 cases, no causative lesions were identified. 4. 41 out of 45 radiolucent stones were successfully removed by ureteroscopic procedure and 9 ureteral strictures were dilated. 6 cases of ureteral mass were successfully biopsied for pathological diagnosis. 5. 23 cases of post-operative or fever were treated conservatively and 10 cases of mucosal tearing and 1 case of ureteral perforation were treated with double-J stent indwelling. Conclusions: The ureteroscopy is effective modality to evaluate and treat in the ureteral filling defect or obstruction on the excretory urogram.

STS 304 스테인리스강의 플라즈마 페이스트 침붕처리에 관한 연구

李聖道,李贊揆,孫明淑,尹在弘,許聖康 國立 昌原大學校 産業技術硏究所 1997 産技硏論文集 Vol.11 No.-

Various surface properties of boride layer formed by plasma paste boronizing were examined. A boride layer of flat structure was formed on the STS 304 stainless steel substrate by plasma paste boronizing treatment with several different temperature from 1023K to 1223K under gas mixture of Ar/H₂: 2/1(vol.%). The paste was composed of 30wt% boron and 70wt% borax. The properties of boride layer were evaluated by micro vickers hardness tester, SEM, EPMA, and corrosion tester. Metallographic cross section of the borided specimen was consisted of the boride layer, Ni rich layer, Cr rich layer, and matrix structure. It was found to form boride layer in a short time to conventional boronizing methode. In XRD analysis of boride surface, various peaks such as FeB, Ni₃B and CrB were presented. Especially, the peak of CrB was more intensive than other peaks. Activation energy for the formation of boride layer was found to be 123kJ/mol which is lower than the conventional boronizing treatment. The microhardness of these boride layers were in the range of HV 1800∼2000. However, from the results of anodic polarization curve in 1M H₂SO₄solution on the borided specimens, it is found that the corrosion resistance is improved by boronizing treatment. Primary current density is, however, increased with the Boronizing temperature.

Packed-bed column에서 산림부식질의 중금속 흡착 특성

안세희,손성길,이동화,최인규 대구대학교 과학기술연구소 1999 科學技術硏究 Vol.5 No.5

This experiment investigates the adsorption characteristic of heavy metals by humic substances of Forest soil in a packed bed column. Forest humic substances contain various components such as carboxyl group, phenol group which provide active sites for heavy metal binding. Humic substances of high cation exchange capacity have been utilized for removing metal ions. The analysis of chemical structure of humic substances was investigaed by FT-IR and CP/MAS Carbon-13 NMR Spectrometer at last year. Adsorption experiments of heavy metal cation by humic substances was conducted to the optimum adsorption condition. The adsorption isotherms for Cu, Zn, Cd, Cr conformed to Langmuir's equation. In the packed bed column, the adsorption ratios of Cu, Zn, Cd, Cr on the humic substances were more than 90%. There were no significant differences between the adsorption ratio and the species of humic substances. With increasing retention time, the removal efficiency of heavy metal ions were not changed greatly. The adsorption ratio of the heavy metal ions were considerably greater for the packed bed reactor than for the stirred reactor. The stirred and column methods give similar result for the adsorption characteristics of heavy metal ion in humic substances.

算數科 現場敎育 實態調査를 通한 基本的 裝學의 方向提示에 關한 硏究

河永純,孫鎔圭,李祥奎 晋州敎育大學 科學敎育硏究所 1983 科學敎育硏究 Vol.9 No.-

This study aims at, first, getting hold of the present states in the overall activities of arithmetic education in the elementary schools and the teaching activeries of numbers, operations, figures, measurements and the related domains in the 1st and 2nd grades, secondly, presenting the direction of the basic promotion of learming after searching out the problems related to the activities.

열공형과 비열공형 피질하 혈관성 치매에서 위험인자의 차이에 관한 비교 연구

배희준,정지향,유경호,나덕렬,김상윤,최경규,양동원,손의주,이상도,김재우,박경원,김응규,이재홍,박미영,한일우,함동석,최문성,하충건,최성혜,이애영,이병철,한설희 대한치매학회 2003 Dementia and Neurocognitive Disorders Vol.2 No.2

Backgrounds and Objectives: Vascular dementia is a group of dementing disoders arising from various stroke syndrome. Among these. subcortical ischemic vascular dementia (SIVD) is regarded as a relatively distinct clinical entity. However, MRI patterns of SIVD are not homogenous. In some patients, lacunes are dominant, and in others, subcortical white matter changes are. This study was designed to compare risk factor profiles between SIVD with and without multiple lacunes. Methods: We divided 47 subjects (22 males, mean age. 68 years) recruited from VADAPET (Multicenter Trial For Evaluation Of The Changes In the PET Images Of Subcortical Vascular Dementia Patient) study into two groups one with more than 5 lacunes in deep gray matter (lacune group) and the other with 5 or less(non-lacune group) Clinical characteristics and laboratory findings of two groups were compared. Results: Nineteen of 47 patients (40%) belonged to the lacune group. The lacune and non-lacune groups d d not differ in the following variables: age, hypertension, diabetes mellitus, hyperlipidemia heart disease, history of stroke or TIA, history of trauma or major surgery, family history of hypertension stroke, or dementia, age at diagnosis of dementia, body mass index, white blood cell count, ESR, CRP, fibrinogen, hemoglobin A1C, total cholesterol. LDL cholesterol creatinine, proteinuria, glucosuria, and microhematuria. However, male sex, smoking alcohol. hemoglobin, and HDL cholesterol were possibly associated more with lacune group SIVD than with non-lacune group (p<0 1) Multivariate analyses revealed that smoking, hemoglobin, and HDL cholesterol were independent predictors of SIVD with multiple lacunes Conclusion: Our study suggests that SIVD with multiple lacunes may be significantly different in smoking habits hemoglobin, and HDL cholesterol from SIVD without multiple lacunes.

Objective evaluation for severity of atopic dermatitis by morphologic study of skin surface contours

Son, Sang W.,Park, Sang Y.,Ha, Seung H.,Park, Gyu M.,Kim, Min G.,Moon, Jong S.,Yoo, Dong S.,Oh, Chil H. Munksgaard International Publishers 2005 Skin research and technology Vol.11 No.4

<P>Background/aims</P><P>Wide variation in outcome methodology can make the interpretation of patient outcomes confusing and the comparison of the results of different studies almost impossible. It is important to objectively measure and record the severity of atopic dermatitis (AD) for routine clinical practice and research. The aim of this study was to evaluate whether morphologic study of skin surface contours might be helpful to objectively quantify the severity of AD.</P><P>Methods</P><P>Thirty atopic patients (12 females, 18 males) participated in this study. Moisturizer was applied twice daily for 2 weeks. Bioengineering methods such as D-Squame®, corneometer, evaporimeter, and spectrophotometer were measured at the start of the study and after 1 week and 2 weeks. In addition, we assessed moisturizer effects after 3 h of moisturizer application.The stereoimage optical topometer (SOT) based on a new concept of stereoimage was applied for this study. We compared SOT, other bioengineering methods, and the severity scoring of atopic dermatitis (SCORAD) index.</P><P>Results</P><P>After 3 h of application with moisturizer, the results measured by SOT, conventional optical profilometer (COP), D-Squame®, and corneometer showed significant differences (<I>P</I><0.05). After 1 and 2 weeks, there were significant changes in the results measured by SOT, COP, D-Squame®, corneometer, spectrophotometer, and SCORAD index. We observed a significant correlation between bioengineering methods and the SCORAD index (<I>P</I><0.05).</P><P>Conclusion</P><P>These data indicate that morphologic study of skin surface contours are useful in evaluating of AD severity. If we would combine methods to evaluate the physiologic changes and those such as SOT to measure the morphological changes of skin surface, we could evaluate more objectively and quantitatively the severity of AD.</P>

<i>Ex vivo</i> imaging of basal cell carcinoma using synchrotron phase-contrast X-ray microscopy

Son, Sang Wook,Park, Sang Yong,Man Park, Gyu,Ha, Seung Han,Lee, Gun Woo,Lee, On Seok,Hwu, Yeukuang,Kim, Ae Ree,Je, Jung Ho,Oh, Chil Hwan Blackwell Publishing Ltd 2008 SKIN RESEARCH AND TECHNOLOGY Vol.14 No.1

<P>Background/aims</P><P>There is a need for development of non-invasive methods to improve early diagnosis and screening of suspected malignant lesions. Phase-contrast X-ray microscopy (PCXM) has potential to reveal the structures inside soft tissues, and fine details can be observed without any staining or contrast-enhancing cell preparation. We aimed to investigate the possibility that PCXM can be used to explore the microscopic details of basal cell carcinoma (BCC).</P><P>Methods</P><P>Paraffin blocks of specimens from patients with basal cell carcinoma were cut with 30 μm thickness for PCXM imaging. Experiments were performed at the International Consortium of Phase Contrast Imaging and Radiology (ICPCIR) (7B2) beamline of the Pohang light source in Korea. The PCXM images were achieved by using coherent hard X-rays from a synchrotron source with no monochromatization.</P><P>Results</P><P>We could obtain images with clear edge enhancement by PCXM. The images taken with this technique showed clear anatomic details of organelles in normal skin such as epidermis, dermis and skin appendages. Most of cancerous lesions were clearly differentiated from adjacent normal tissues and the images closely corresponded to those obtained with low-magnification optical microscopy.</P><P>Conclusion</P><P>In this pilot study, we successfully demonstrated that synchrotron PCXM could be used for radiological imaging of BCC with great anatomic details.</P>

Effect of In Vivo Embryo Production and Embryo Transfer Following Superovulation in Hanwoo

Sang-Rae Cho,Sun-Ho Choi,ChangYong Choe,Jun-Kyu Son,Soo-Ho Choi,Young-joo Kim,Poongyeon Lee,Yeoung-Gyu Ko,Sung-Heum Yeon,Jin-Woo Jung,Sung-Jae Kim,Yeon-Sub Jung,Nan-Hee Bok,Hyun-Jong Kim,Dong-Soo Son 한국동물생명공학회(구 한국동물번식학회) 2010 발생공학 국제심포지엄 및 학술대회 Vol.2010 No.1