靑刈作物의 成熟段階에 따르는 營養 成分 變化

蔣潤煥,河成珍 慶北大學校 1980 論文集 Vol.29 No.-

The barley (Barsoy species) and rye (Petkuser) forages were collected at the varying stages of maturity from pre-heading to yellow ripe stage. The contents of general and inorganic compositions were analyzed by the methods of common procedure, colorimetry, and atomic absorption spectrophotometry. 1. The crude pcotein contents in green fodder and its hay of barley were in the ranges of 1.4-3.7% and 8-19%, respectively. The changes of dry matter contents following the maturity represented a decreasing trend. The ether extract levels in hay were 0.8-1.4%, showing unchangeable figure with the progress of maturity. N-free extract contents in hay were from 35% to 57%. They were increased while the maturity of plant progressed. The contents of crude fiber were increased until the stage of early bloom, but decreased after that. The contents of calcium, phosphorus, potassium, sodium and magnesium were similar to those other researchers reported. However, the values of iron, manganese and zinc were different from the others. The levels of inorganic elements in barley dry matter were not much different from each other following the maturity. 2. The contents of crude protein in fodder rye and its hay were 2.2-3.2% and 7-19%, respectively. The levels in dry matter were decreased according to the progress of maturity as well as in barley. The ether extract contents in hay were 0.8-2.0%, nitrogen-free extract were 35.5-43.7%, crude fiber were 23.0-32.3% and crude ash were 7.5-4.7%. The changing trends for above general compositions following the matunity were similar to those in barley. The values of mineral compositions in rye dry matter showed unchangeable figures as in barley.

중등도 심부전증 환자에서 Carvedilol의 치료 효과

차동훈,차영수,국진환,황경화,김형태,임상욱,김태용,조윤경,박필원 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.4

회맹장 및 대장을 침범한 장 결핵에 있어서 바륨을 이용한 방사선 이중조영촬영 소견에 대한 연구

진용현,전혜정,이용근,강철호,조성범,김윤환,박철민,차상훈,김일영,이혜경 건국대학교 의과학연구소 2002 건국의과학학술지 Vol.12 No.-

To determine the characteristic double contrast barium enema findings of ileo-cecal and colonic tuberculosis and to make differential diagnosis from other bowel inflammatory disease. Sixty-seven patients confirmed as ileo-cecal and/or colonic-tuberculosis in six hospitals were evaluated retrospectively. The diagnosis was proven by endoscopic biopsy, surgery, and clinical follow up. Nine of 67 patients were excluded because radiologic findings were normal though endocopic biopsy examinations resulted in tuberculosis. Histopathological diagnosis were madein 58 cases as follows: endoscopic biopsy(n=29), operation(n=12), follow up examination(n=14), tissue culture(n=1), laparoscopic biopsy(n=2). There were 30 men and 28 females. The mean age were 36 yrs(range:16-67), 34 patients were in the second and third decade. The distribution of lesions, morphological characteristics, mucosal changes, ulcer shape and depth, associated with other tuberculous lesion, multiplicity were retrospectively analyzed in the findngs of double contrast barim enema. The commonest clinical symptoms were abdominal pain(n=35, 60%) and diarrhea(n=18, 31%). The chest radiography revealed association of pulmonary tuberculosis in 39 cases. Tuberculous lesions of other organs except chest were present in five cases. Double contrast barium enema findings showed a thickening and irregularity of intestinal mucosal fold(n=29, 50%), bowel contraction and/or shortening(n=26, 45%). There were small, nodular, superficial ulcers in the case of ulcer depth less than 2 mm in the depth. As many as 39 cases(67%) in this series had two or more lesions in the intestinal tuberculosis. The involved segment revealed symmetrical feature(n=21, 36%). Inflammatory pseudopolypoid lesions were noted in 30 cases(52%). The ileo-cecal region was involved in 38 cases(66%). The ascending colon(n=25, 43%) was the second commonest site with or without contiguous cecal involvement. Lesions in terminal ileum, ileo-cecal valve, transverse colon, descending colon and appendix were seen in 19, 18, 18, 12 and seven cases, respectively. Among 18 cases of ileo-cecal valve lesions, there were incompetency in nine cases(16%) and wide gapping in four cases(7%). In 14 cases, tuberculous enterocolitis was diagnosed by clinical follow-up and double contrast barium enema study. 12 out of 14 cases, the findings of double contrast barium enema of tuberculous enterocolitis were normalized after anti-tuberculous medication. However, two cases showed more aggravated state than before due to inappropriate treatment. Double contrast barium enema plays an important role in the diagnosis of tuberculous enterocolitis, determines the type, site and extent of the involvement and helps in treatment guide by using sequential studies.

옴 가열이 대두 단백질의 열변성에 미치는 영향

차윤환 ( Yun Hwan Cha ) 한국식품영양학회 2011 韓國食品營養學會誌 Vol.24 No.4

Ohmic heating uses electric resistance heat which occurs equally and rapidly inside food when an electrical current is passed throught. In this study, we observed the physical & chemical characteristics changes which occurs in soybean protein during heating denaturation by using ohmic and conventional heating. After the ohmic heating process, we could not find any change of the primary protein structure in the denaturated soy protein samples. However, the rate of imbibed water(RIW) of the ohmic samples was 2 times faster than that of the conventional samples. Also the ANS-surface hydrophobicity was decreased, which is very closely related to RIW. In the differential scanning calorimeter(DSC) analysis result, all 7S soyprotein fraction samples were completely denaturated by ohmic and conventional heating. However, the 11S samples were completely denatured only by ohmic heating. According to the DSC result, we decided that soyprotein was damaged by temperature and electrical current during ohmic heating. The damage of electrical current was a cause of the charcteristic changes.

옴가열이 전분의 Pasting 특성에 미치는 영향

차윤환 ( Yun-hwan Cha ) 한국식품영양학회 2017 韓國食品營養學會誌 Vol.30 No.4

Ohmic heating is an internal heating method based on the principle that when an electrical current passes through food, electric resistance heat is uniformly generated internally by food resistance. Previous studies indicate that the thermal properties, external structure, internal structure, and swelling power of ohmic heat treated starch of various starches, such as potato, wheat, corn, and sweet potato, differed from those of conventional heating at the same temperature. In this study, the pasting property of starch, treated with ohmic and conventional heating, were measured by RVA (Rapid Visco-Analyzer). Our results show that as the ohmic heating temperature increased, the PV (Paste Viscosity) of the starch decreased significantly, and the PT (Pasting Temperature) increased. Changes in PV and PT indicate that the swelling of starch remains unchanged by ohm heating. The HPV (Hot Paste Viscosity), CPV (Cold Paste Viscosity) and SV (Setback Viscosity) of ohmic heated starch also differed from the conventional heated starch. The pasting property is similar to the viscosity curve of common cross-linked modified starch. In this experiment, we further confirm the similarity with modified starch and its usability.

혼합 참기름 중 개별 식용유 조성의 분석

차윤환,신효선 동국대학교 산업기술연구원 1997 산업기술논문집 Vol.10 No.-

시중에서 판매되는 참기름, 대두유, 옥수수유, 커놀라유, 면실유, 미강유, 팜올레인을 다양한 비율로 헌합한 혼합 참기름에서 개별 식용유와 혼합 참기름 중의 지방산, 스테롤류, 토코페롤류, 리그난 화합물의 조성을 분석하여 혼합 참기름 중 개별 식용유의 조성을 분석하는데 이용하였다. 식용유 중 참기름은 lignan 화합물, 카놀라유는 brassicasterol과 erucic acid, 미강유는 동정되지 않은 Unk. C, 팜올레인은 저급포화지방산을 특이성분(characteristic component)으로 각각 함유하고 있었다. 그러나 대두유, 옥수수유, 면실유는 특이성분을 함유하지 않았다. 혼합 참기름 중 특이성분을 함유하는 식용유는 특이성분을 이용하여 그 조성을 분석하였고, 비특이 식용유는 분석한 성분을 행렬로 만들어 그 조성을 분석하였다. 이때 모든 data처리는 BASIC으로 작성한 프로그램으로 처리하였다. 조제한 42개 혼합 참기름 중 24개 시료는 70% 이상의 정확도를 보였고, 12개와 6개 시료는 각각 50~70%와 50%이하의 정확도를 보였다. 혼합 참기름 중에서 개별 식용유 조성을 분석함에 있어 팜올레인이 가장 정확하게 분석되었고, 옥수수유가 가장 부정확하게 분석되었다. The data obtained by GLC and HPLC analysis of fatty acids, sterols, tocopherols and lignan compounds were applied to quantitative estimation of individual oils in blended sesame oil with soybean, corn, canola, cottonseed, rice bran and palm oils in market. Quantitative estimation of individual oils in blended sesame oil was approached by the selection of certain characteristic components for each oil. Lignan compounds in sesame oil, brassicasterol and erucic acid in canola oil, unidentified unk. C in rice bran oil and low chain fatty acid in palm olein were characteristic components in each oils. But, soybean oil, corn oil and cottonseed oil had not characteristic components. Quantitative estimation of individual oils including characteristic components in blended sesame oils was achieved by using characteristic components and that of oil excluding characteristic components was achieved by a matrix comparison method. A computer program was prepared in BASIC to facilitate automatic estimation and printout of results. In total 42 blended sesame oil samples, 24 samples were identified with above 70% accuracy. 12 and 16 samples were identified 70~50% and below 50% accuracy, respectively.

Antioxidant and hepatoprotective effects of Korean ginseng extract GS-KG9 in a D-galactosamine-induced liver damage animal model

Yun Ho Jo,Hwan Lee,Myeong Hwan Oh,Gyeong Hee Lee,You Jin Lee,Ji Sun Lee,Min Jung Kim,Won Yong Kim,Jin Seong Kim,Dae Seok Yoo,Sang Won Cho,Seon Woo Cha,Mi Kyung Pyo 한국영양학회 2020 Nutrition Research and Practice Vol.14 No.4

BACKGROUND/OBJECTIVES: This study was designed to investigate the improvement effect of white ginseng extract (GS-KG9) on D-galactosamine (Ga1N)-induced oxidative stress and liver injury. SUBJECTS/METHODS: Sixty Sprague-Dawley rats were divided into 6 groups. Rats were orally administrated with GS-KG9 (300, 500, or 700 mg/kg) or silymarin (25 mg/kg) for 2 weeks. The rats of the GS-KG9- and silymarin-treated groups and a control group were then intraperitoneally injected Ga1N at a concentration of 650 mg/kg for 4 days. To investigate the protective effect of GS-KG9 against GalN-induced liver injury, blood liver function indicators, anti-oxidative stress indicators, and histopathological features were analyzed. RESULTS: Serum biochemical analysis indicated that GS-KG9 ameliorated the elevation of aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), and lactate dehydrogenase (LDH) in GalN-treated rats. The hepatoprotective effects of GS-KG9 involved enhancing components of the hepatic antioxidant defense system, including glutathione, glutathione peroxidase (GPx), superoxide dismutase (SOD), and catalase (CAT). In addition, GS-KG9 treatment inhibited reactive oxygen species (ROS) production induced by GalN treatment in hepatocytes and significantly increased the expression levels of nuclear factor erythroid-2-related factor 2 (Nrf2) and heme oxygenase-1 (HO-1) proteins, which are antioxidant proteins. In particular, by histological analyses bases on hematoxylin and eosin, Masson"s trichrome, α-smooth muscle actin, and transforming growth factor-β1 staining, we determined that the administration of 500 mg/kg GS-KG9 inhibited hepatic inflammation and fibrosis due to the excessive accumulation of collagen. CONCLUSIONS: These findings demonstrate that GS-KG9 improves GalN-induced liver inflammation, necrosis, and fibrosis by attenuating oxidative stress. Therefore, GS-KG9 may be considered a useful candidate in the development of a natural preventive agent against liver injury.

Evaluation of antibacterial activity against Candida albicans according to the dosage of various denture cleansers

Cha-Hwan Bae,Yun-Kyong Lim,Joong-Ki Kook,Mee-Kyoung Son,Yu-Ri Heo 대한치과보철학회 2021 The Journal of Advanced Prosthodontics Vol.13 No.2

PURPOSE. The purpose of this study is to compare the antibacterial activity of currently purchasable denture cleansers against Candida albicans. Materials and methods. This study used tablet-type denture cleansers, Polident(R), Coolingdent(R) and Fittydent(R), along with liquid denture cleansers, Hexamedine(R), Listerine(R) and Apple vinegar(R). The antibacterial activities of denture cleansers were evaluated based on the number of C. albicans and concentrations of the denture cleansers. Results. In the 0.5 × 106 cfu/㎖ culture medium, the C. albicans’ death rate of Polident(R) was significantly lower than those of Fittydent(R), Hexamedine(R), Listerine(R), and Apple vinegar(R)(P <.05). In the 0.5 × 107 cfu/, the C. albicans ’ death rates of Polident(R) and Coolingdent(R) were significantly lower than those of Fittydent(R), Hexamedine(R), Listerine(R) and Apple vinegar(R)(P <.05). The C. albicans death rates of Polident(R) and Coolingdent(R) were significantly decreased at 0.02 g and 0.01 g. The C. albicans death rate of Fittydent(R) was significantly decreased at 0.005 g (P <.05). The C. albicans death rate of Hexamedine(R) was significantly decreased at 1/16 dilution. The C. albicans death rate of Listerine(R) was decreased at 1/8 dilution, and the antibacterial activity of Apple vinegar(R) was decreased at 1/4 dilution (P <.05). Conclusion. As the number of C. albicans increased, the antibacterial activities of the denture cleansers decrease. In the tablet-type denture cleanser, all denture cleansers showed 100% C. albicans death rate when used at a dose of 1 tablet. One denture cleanser showed the same antibacterial effect with only 1/3 of a tablet. In the liquid type denture cleanser, the level of dilution required was different for each denture cleanser.

Low thermal conductivity and high durability porous thermal insulation coating via room–temperature spray coating process

Yun Sae-Jung,Kim Jung-Hwan,Cha Hyun-Ae,Ahn Cheol-Woo,Moon Young Kook,Jang Jongmoon,Yoon Woon-Ha,Choi Jong-Jin,Hahn Byung-Dong 한국세라믹학회 2024 한국세라믹학회지 Vol.61 No.1

Herein, an efficient approach using aerosol deposition (AD) is proposed to fabricate a porous ceramic film with high thermal insulating and adhesive properties. Polyethylene powder (PE) is incorporated to regulate the kinetic energy of the ZrSiO4 powder, which hinders the formation of structurally stable film layers. During the high-energy milling process, the ZrSiO4-PE composite powder agglomerates suitably and exhibits adequate kinetic energy to produce a porous film. Despite its exceptional thermally insulating characteristics, the ZrSiO4-PE composite film demonstrates relatively poor adhesion properties. Consequently, an optimized quantity of Y2O3 powder is blended to modulate the thermal insulating and mechanical adhesion properties of the porous coating films. The Y2O3-(ZrSiO4-PE) composite film (approximately 60 μm) exhibits low density (2.2 g/cm3), low thermal conductivity (at ambient temperature, approximately 0.64 W/m∙K), and excellent adhesion strength (37 MPa) attributes. This research offers valuable guidance for fabricating composite porous ceramic films with low thermal conductivity and high adhesion at room temperatures using AD.

Validation of the Korean coeffcient for the modi-fication of diet in renal disease study equation

( Yun Jung Oh ),( Ran Hui Cha ),( Seung Hwan Lee ),( Kyung Sang Yu ),( Satbyul Estella Kim ),( Ho Kim ),( Yon Su Kim ) 대한내과학회 2016 The Korean Journal of Internal Medicine Vol.31 No.2

Background/Aims: Race and ethnicity are important determinants when estimating glomerular filtration rate (GFR). The Korean coeffcients for the isotope dilution mass spectrometry (IDMS) Modification of Diet in Renal Disease (MDRD) Study equations were developed in 2010. However, the coeffcients have not been validated. The aim of this study was to validate the performance of the Korean coeffcients for the IDMS MDRD Study equations. Methods: Equation development and validation were performed in separate groups (development group, n = 147 from 2008 to 2009; validation group, n = 125 from 2010 to 2012). We compared the performance of the original IDMS MDRD equations and modified equations with Korean coefficients. Performance was assessed by comparing correlation coefficients, bias, and accuracy between estimated GFR and measured GFR, with systemic inulin clearance using a single injection method. Results: The Korean coeffcients for the IDMS MDRD equations developed previously showed good performance in the validation group. The new Korean coe ffcients for the four- and six-variable IDMS MDRD equations using both the development and validation cohorts were 1.02046 and 0.97300, respectively. No significant difference was detected for the new Korean coeffcients, in terms of estimating GFR, between the original and modified IDMS MDRD Study equations. Conclusions: The modified equations with Korean coefficients for the IDMS MDRD Study equations were not superior to the original equations for estimating GFR. Therefore, we recommend using the original IDMS MDRD Study equation without ethnic adjustment in the Korean population.