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임수현(Soo Hyun Lim),김국영(Kook Young Kim),정재근(Jae Keun Chung)한재욱(Jae Wook Han),김응수(Ungsoo Samuel Kim) 대한검안학회 2020 Annals of optometry and contact lens Vol.19 No.2
Purpose: To investigate the efficacy and detection rate of disease in the customized eye examination program. Methods: We reviewed the medical charts of 122 patients who have conducted the customized eye examination program from January 2018 to January 2019 in Kim’s Eye Hospital retrospectively. The customized eye examination program consisted of visual acuity test, intraocular pressure measurement, color vision test, slit-lamp examination, visual field tests, fundus photography, spectral domain optical coherence tomography (Cirrus HD-OCT, Zeiss), Optical Quality Analysis System (OQAS, Visiometrics, Terrassa, Spain), and dry eye test (LipiView II TearScience, Morrisville, NC, USA). The rate of newly diagnosed diseases and vision-threatening disorders including glaucoma and retinal disorders were calculated. Results: A total of 122 patients (46 males and 76 females, mean age; 47.8 ± 14.0 years old, from 22 to 85 years) were included. Nine patients (14 eyes) had a poor vision of less than 0.8. Newly detected diseases were found in 17 patients (13.9%), and among them, 10 glaucoma (8.2%) and retinal disorders (5.7%) were included. When it comes to glaucoma, 7 patients were diagnosed with definite glaucoma with visual field loss, and 3 patients had preperimetric glaucoma. Retinal disorders were composed of 5 epiretinal membranes, 1 diabetic retinopathy, and 1 central serous chorioretinopathy. Conclusions: Various diseases were identified by the customized eye examination program, and vision-threatening diseases such as glaucoma and retinal disorders were found. Therefore, a regular eye examination is needed to detect the serious ocular diseases in the early stage.
Effect of Physical and Chemical Treatments on Chitosan Viscosity
No, Hong Kyoon,Kim, Soon Dong,Kim, Dong Seok,Kim, So Ja,Samuel P. Meyers 한국키틴키토산학회 1999 한국키틴키토산학회지 Vol.4 No.4
물리적, 화학적 처리가 키토산의 점도에 미치는 영향을 조사하였다. 키토산의 점도는 물리적(분쇄, 가열, 고온가압,초음파) 그리고 화학적(오존) 처리에 의해 크게 영향을 받았으며, 처리 시간과 온도가 증가함에 따라 감소하였다. 그러나 키토산 용액을 -40℃ 에서 9일간 저장하였을 때 점도 변화는 나타나지 않았다. 키토산 용액을 4℃와 23℃에서 61일간 저장하였을 때 점도는 각각 23%와 64% 감소하였다. Effects of physical and chemical treatments on chitosan viscosity were investigated. Chitosan viscosity was considerably affected by physical (grinding, heating, autoclaving, ultrasonication) and chemical (ozone) treatments, except for freezing, and decreased with an increase in treatment time and temperature. Freezing at -40℃ for 9 days did not affect the viscosity of chitosan solution. The chitosan solution stored at 4 and 23℃ for 61 days decreased in viscosity by 23 and 64%, respectively. This suggests that chitosan solution stored at 4t is relatively stable from a viscosity point of view.
Kim, Moon Young,Baik, Soon Koo,Park, Dong Hun,Lim, Dae Wook,Kim, Jae Woo,Kim, Hyun Soo,Kwon, Sang Ok,Kim, Young Ju,Chang, Sei Jin,Lee, Samuel S. Wiley-Blackwell Publishing 2007 Liver International Vol. No.
<P>Abstract</P><P>Background and Aims</P><P>Alterations in the Doppler hepatic vein (HV) waveform are associated with cirrhosis and portal hypertension. We prospectively evaluated the correlation between the extent of abnormal Doppler HV waveforms expressed as damping index (DI) and the hepatic venous pressure gradient (HVPG) and response to propranolol in patients with cirrhosis.</P><P>Material and Methods</P><P>In 76 patients with cirrhosis (69 men and seven women), both DI of Doppler HV waveform and HVPG were measured, and the relationship between them was analysed. DI was calculated by the minimum velocity/maximum velocity of the HV waveform. An HVPG>12 mmHg was defined as severe portal hypertension. In a subgroup of 19 patients receiving propranolol, changes in both DI and HVPG were evaluated after propranolol administration for 3 months. One author (S. K. B.) performed all DI of Doppler HV waveform studies.</P><P>Results</P><P>Abnormal HV waveforms were seen in 66 of 76 patients (86.8%). DI significantly correlated with the grade of HVPG, i.e. with higher HVPG increased DI was observed (<I>P</I><0.01). By logistic regression analysis, DI>0.6 was significantly more likely to be severe portal hypertension (odds ratio: 14.19, 95% confidence interval: 4.07–49.55). Receiver-operating characteristic curve according to the value of 0.6 of DI showed a sensitivity of 75.9% and a specificity of 81.8% for the presence of severe portal hypertension. In 19 patients of the propranolol subgroup, change of DI following propranolol treatment also significantly correlated with that of HVPG (<I>P</I><0.01).</P><P>Conclusions</P><P>Damping index of the HV waveform by Doppler ultrasonography might be a non-invasive supplementary tool in evaluating the severity of portal hypertension and in responding to propranolol in patients with liver cirrhosis.</P>
Original Articles : Quantitative Analysis of Optic Disc Color
( Ung Soo Samuel Kim ),( Sun Jung Kim ),( Seung Hee Baek ),( Hwang Ki Kim ),( Yong Ho Sohn ) 대한안과학회 2011 Korean Journal of Ophthalmology Vol.25 No.3
Purpose: To evaluate the reproducibility of ImageJ software in analyzing the color of the optic disc. Methods: One hundred twelve normal participants (56 males and 56 females) were enrolled in this study. The image of the optic disc was taken using Kowa digital disc photo-graphy, and the gray scales of the nasal rim (NR), brightest cupping center (BCC) and largest inferior retinal vein (IRV) were calculated using histogram in ImageJ. Three different observers calculated the gray scales three separate times. Reproducibility was assessed using the interclass correlation coefficient (ICC). Results: The mean age of the participants was 50.6 years old (range, 11 to 82 years). The mean gray scales of the nasal rim were 91.81, 94.91, and 93.24; those of the brightest cupping center were 174.84, 179.94, and 177.76; and those of the largest inferior retinal vein were 61.85, 53.48, and 56.73 for observers 1, 2, and 3, respectively. Inter-observer reproducibility for NR, BCC and IRV was considered good based upon ICC values of 0.944, 0.860, and 0.789 for observers 1, 2, and 3, respectively. Significant age-related differences between the values of the brightest cupping center were noted, and the gray scale score was decreased in the older participants (p<0.001). Conclusions: The gray scale of the brightest cupping center diminished with age. ImageJ can be a useful objective tool with high reproducibility in the analysis of optic disc color.
다양한 제조공정에 따른 사과주스의 이화학 특성 및 항산화 활성
김급래(Keup-Rae Kim),김건오(Keono Kim),박사무엘(Samuel Park),김승현(Seung Hyun Kim),김태완(Teawan Kim),이동희(Donghui Lee),성지혜(Jeehye Sung) 한국식품영양과학회 2024 한국식품영양과학회지 Vol.53 No.3
본 연구는 국내에서 제조공법에 따른 시판 사과주스의 이화학적 품질 특성, 항산화 활성 및 주요 플라보노이드 조성을 분석하였다. 본 연구에서 사과주스의 이화학적 특성을 분석한 결과 FC 주스에서 NFC 주스와 CF 주스보다 당도가 다소 낮은 반면 산도 및 pH는 유의적인 차이가 나타나지 않았다. 이외에도 각 시료의 색도 차이가 관찰되었지만 제조공정 차이에 의한 경향은 보이지 않았다. 항산화 활성 분석 결과 NFC 주스와 CF 주스의 항산화 활성이 FC 주스에 비해 유의적으로 높았다. 이러한 항산화 활성 차이는 사과주스 내 hydrophilic한 폴리페놀 및 플라보노이드 성분이 크게 기여한 것으로 사료된다. 사과주스 내 주요 플라보노이드는 phlorizin, (-)-epicatechin, procyanidin B1, procyanidin B2 및 procyanidin B5였으며 FC 주스와 비교해서 NFC 주스와 CF 주스의 함량이 높았다. 이는 사과주스 제조 시 농축과정 중 열처리로 인해 일부 플라보노이드를 포함한 항산화 성분들이 파괴되어 항산화 활성의 감소를 유도한 것으로 판단된다. Apple juice has recently attracted attention due to its high polyphenol content and antioxidant capacity. The present study investigated the flavonoid compositions and antioxidant properties of apple juices produced by cold filling (CF), from concentrate (FC), or not from concentrate (NFC). Flavonoid compositions were determined by LC-MS/MS using a triple quadrupole instrument, and antioxidant activities were evaluated using a ferric-reducing power assay and ABTS and DPPH radical scavenging assays. Results showed CF and NFC juices had significantly higher total phenolic and flavonoid contents than FC juice. Flavonoids detected and quantified included procyanidins, (–)-epicatechin, and phlorizin. Procyanidin B2 (0.45±0.03∼2.54±0.23 μg/mL) and (–)-epicatechin (0.70±0.03∼2.44±0.17 μg/mL) levels were significantly higher than those of other flavonoids in CF and NFC juices. In addition, NFC apple juice was the strongest radical scavenger and ferric ion reducer. These results suggest that CF and NFC apple juices be considered safe, effective, and natural products.
문맥혈전이 합병된 환자에서 Jump Graft를 이용한 간이식술 및 수술후 유미성 복수의 보고
김수태(Soo Tae Kim),김주섭(Joo Seop Kim),이영철(Young Cheol Lee),이삼열(Samuel Lee),조마해(Ma Hae Cho),김호철(Ho Chul Kim),최철순(Chul Soon Choi),배상훈(Sang Hoon Bae),최현(Hyun Choi),김종혁(Jong Hyeok Kim),유재영(Jae Young Yoo) 대한외과학회 1998 Annals of Surgical Treatment and Research Vol.55 No.6
Electrosprayed graphene decorated with ZnO nanoparticles for supercapacitors
Samuel, Edmund,Londhe, Priyanka U.,Joshi, Bhavana,Kim, Min-Woo,Kim, Karam,Swihart, Mark T.,Chaure, Nandu B.,Yoon, Sam S. Elsevier 2018 Journal of alloys and compounds Vol.741 No.-
<P><B>Abstract</B></P> <P>A binder-free nanocomposite consisting of ZnO nanoparticles (NPs) grown directly on graphene sheets by electrospraying was fabricated for use as an electrode material in supercapacitors. The optimal concentrations of graphene and ZnO NPs were determined from the capacitive characteristics of the composite. Scanning electron microscopy confirmed that the ZnO NPs grew in a uniformly distributed manner on the graphene sheets and that they exhibited negligible agglomeration. Further, X-ray diffraction analysis confirmed that ZnO growth was preferentially oriented along (100) plane in the ZnO/graphene composite. A symmetric supercapacitor fabricated using this composite exhibited an energy density of 67 mWh·cm<SUP>−3</SUP> and power density of 6000 mW·cm<SUP>−3</SUP>. The composite also showed good long-term cycling performance, retaining 90% of its capacitance after 1000 galvanostatic charge/discharge cycles.</P> <P><B>Highlights</B></P> <P> <UL> <LI> ZnO/graphene electrodes for supercapacitor applications have been fabricated using electrospraying. </LI> <LI> A symmetric supercapacitor exhibited an energy density of 67 mWh·cm-3 and power density of 6000 mW·cm<SUP>−3</SUP>. </LI> <LI> The composite retained 90% of its capacitance after 1000 galvanostatic charge and discharge cycles. </LI> <LI> The graphene sheets prevented agglomeration of the ZnO nanoparticles. </LI> </UL> </P>