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Rationally designed graphene channels for real-time sodium ion detection for electronic tongue

InfoMat 2023年第7期5卷 43-58页

作者： Chung Won Lee Sang Eon Jun seung Ju Kim Tae Hyung Lee Sol A.Lee Jin wook Yang Jin Hyuk Cho Shinyoung Choi Cheol-joo Kim Soo Young Kim Ho Won Jang Department of Materials Science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoulRepublic of Korea Department of Materials Science and Engineering Korea UniversitySeoulRepublic of Korea Department of Chemical Engineering Pohang University of Science and Technology(POSTECH)PohangRepublic of Korea Advanced Institute of Convergence Technology Seoul National UniversitySuwonRepublic of Korea

Monitoring taste-inducing ions and molecules continuously in liquids or solutions is of great considerable matter for the realization of the electronic tongue(E-tongue).Particularly from the five major tastes,the highly selective,sensitive detection of Na^(+)in real-time is *** is due to the saltiness of food is the key ingredient in most ***,existing Na^(+)detecting devices have relatively low performances of selectivity,sensitivity,and lack of on–off ***,conventional devices significantly deteriorate in capac-ity due to repetitive usage or lifetime shortage by degradation of the sensing ***,a graphene-based channel was rationally designed by the facile decoration of Calix[4]arene and Nafion to address this *** act as a receptor and a molecular sieve,respectively,to enhance selectivity and sensitivity and elon-gate the life expectancy of the *** device was merged with a microfluidic channel to control the injection and withdrawal of solutions to fulfill dynamic on–off *** fabricated device has highly selective,sensitive Na^(+)detection properties compared to other 10 molecule/ionic *** on–off functions of the device were available,also possesses a long lifespan of at least 220 ***,it can precisely discriminate real beverages containing Na^(+),which can be observed by principal component analysis *** features offer the possibility of ascending to a platform for E-tongues in near future.

关键词： electronic tongue graphene microfluidic channels Na^(+)sensors solution-gated field-effect transistors

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RGD peptide and graphene oxide co-functionalized PLGA nanofiber scaffolds for vascular tissue engineering

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Regenerative Biomaterials 2017年第3期4卷 159-166页

作者： Yong Cheol Shin Jeonghyo Kim Sung Eun Kim Su-Jin Song SuckWon hong Jin-Woo Oh Jaebeom Lee Jong-Chul Park Suong-Hyu Hyon Dong-wook Han Department of Cogno-Mechatronics Engineering Department of Optics and Mechatronics Engineering Department of Nanoenergy Engineering College of Nanoscience and NanotechnologyPusan National UniversityBusan 46241Korea Cellbiocontrol Laboratory Department of Medical EngineeringYonsei University College of MedicineSeoul 03722Korea and 5Center for Fiber and Textile Science Kyoto Institute of TechnologyMatsugasakiKyoto 606-8585Japan

In recent years,much research has been suggested and examined for the development of tissue engineering scaffolds to promote cellular *** our study,RGD peptide and graphene oxide(GO)co-functionalized poly(lactide-co-glycolide,PLGA)(RGD-GO-PLGA)nanofiber mats were fabricated via electrospinning,and their physicochemical and thermal properties were characterized to explore their potential as biofunctional scaffolds for vascular tissue *** electron microscopy images revealed that the RGD-GO-PLGA nanofiber mats were readily fabricated and composed of randomoriented electrospun nanofibers with average diameter of *** successful co-functionalization of RGD peptide and GO into the PLGA nanofibers was confirmed by Fourier-transform infrared spectroscopic ***,the surface hydrophilicity of the nanofiber mats was markedly increased by co-functionalizing with RGD peptide and *** was found that the mats were thermally stable under the cell culture ***,the initial attachment and proliferation of primarily cultured vascular smoothmuscle cells(VSMCs)on the RGD-GO-PLGA nanofibermats were *** was revealed that the RGD-GO-PLGA nanofibermats can effectively promote the growth of *** conclusion,our findings suggest that the RGD-GO-PLGA nanofiber mats can be promising candidates for tissue engineering scaffolds effective for the regeneration of vascular smooth muscle.

关键词： RGD peptide graphene oxide poly(lactic-co-glycolic acid) biofunctional scaffold vascular smooth muscle cell

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Amylase level in extra hepatic bile duct in adult patients with choledochal cyst plus anomalous pancreatico-biliary ductal union

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World Journal of Gastroenterology 2005年第13期11卷 1965-1970页

作者： In-Ho Jeong Yong-Sik Jung hong Kim Bong-Wan Kim Jung-Woon Kim Jeong hong Hee-Jung Wang Myung-wook Kim Byung-Moo Yoo Jin-hong Kim Jae-Ho Han wook-Hwan Kim Department of Surgery Department of Gastroenterology Department of Pathology

AIM: To investigate the relationship between pancreatic amylase in bile duct and the clinico-pathological features in adult patients with choledochal cyst and anomalous pancreatico-biliary ductal union (APBDU).METHODS: From 39 patients who underwent surgery for choledochal cyst between March 1995 and March 2003,we selected 15 adult patients who had some symptoms and were radiologically diagnosed as APBDU, and their clinico-pathological features were subsequently evaluated retrospectively. However, we could not obtain biliary amylase in all the patients because of the surgeon's ***, we measured the amylase level in gall bladder of 10 patients and in common bile duct of 11 ***: Levels of amylase in common bile duct and gall bladder ranged from 11 500 to 212 000 IU/L, and the younger the patients, the higher the biliary amylase level (r= -0.982, P＜0.01). Pathologically, significant correlation was found between the size of choledochal cyst and the grade of inflammation (r= 0.798,P＜0.01). And, significant correlation was found between the level of amylase in gall bladder and the grade of hyperplasia. On the other hand, there was no correlation to the age of symptomatic onset or inflammatory grade (r = 0.743, P＜0.05). Level of lipase was elevated from 6 000 to 159 000 IU/L in bile duct and from 14 400 to 117 000 IU/L in the gall bladder;however, there was no significant correlation with age or clinico-pathological ***: The results support the notion that amylase has a particular role in the onset of symptoms, and suggest that a large amount of biliary amylase induces early onset of symptom, thereby making early diagnosis possible.

关键词： Choledochal cyst Anomalous pancreaticobiliary ductal union Amylase Hyperplasia

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White phosphorescent organic light-emitting diodes using double emissive layer with three dopants for color stability

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Chinese Optics Letters 2014年第10期12卷 100-103页

作者： Jin wook Kim Nam Ho Kim Ju-AnYoon seung Il Yoo Jin Sung Kang Woo Young Kim Department of Green Energy & Semiconductor Engineering Hoseo University Department of Engineering Physics McMaster University

We fabricate white phosphorescent organic light-emitting diodes （PHOLEDs） with three dopants and double emissive layer （EML） to achieve color stability. The white PHOLEDs use FIrpic dopant for blue EML （B- EML）, and Ir（ppy）3：Ir（piq）3 dopants for green：red EML （GR-EML） with N,N＇-dicarbazolyl-3, 5-benzene （mCP） as host material. Thicknesses of B-EML and GR-EML are adjusted to form a narrow recombination zone at two EML＇s interface and charge trapping happens in EML according to wide highest occupied molecular orbital and/or lowest unoccupied molecular orbital energy band gap of mCP and smaller energy band gap of dopants. The total thickness of both EMLs is fixed at 30 nm in the device structure of ITO （150 nm）/MoO3 （2 nm）/N,N＇-diphenyl-N,N＇-bis（1-naphthyl-phenyl）-（1,1″-biphenyl）-4, 4＇-diamine （70 nm）/ meP：Firpic-8.0% （12 nm）/mCP：Ir（ppy）3-3.0%：Ir（piq）3-1.5% （18 nm）/2″,2＇,2＂＇-（1,3,5-benzinetriyl）-tris（1- phenyl-l-H-benzimidazole）（30 nm）/8-hydroxyquinolinolato-lithium （2 nm）/A1 （120 nm）. White PHOLED shows 18.25 cd/A of luminous efficiency and white color coordinates of （0.358 and 0.378） at 5000 cd/m2 and color stability with slight CIExy change of （0.028 and 0.002） as increasing luminance from 1000 to 5000 cd/m^2.

关键词： EML White phosphorescent organic light-emitting diodes using double emissive layer with three dopants for color stability ITO nm NPB

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Hydroxylation and sulfation of sex steroid hormones in inflammatory liver

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The Journal of Biomedical Research 2017年第5期31卷 437-444页

作者： Sang R. Lee seung-yeon Lee Sang-yun Kim Si-yun Ryu Bae-kuen Park Eui-Ju hong College of Veterinary Medicine Chungnam National University Daejeon Republic of Korea

Sex steroids, also known as gonadal steroids, are oxidized with hydroxylation by cytochrome P450,glucuronidation by UDP-glucuronosyltransferase, sulfation by sulfotransferase, and O-methylation by catechol Omethyltransferase. Thus, it is important to determine the process by which inflammation influences metabolism of gonadal hormones. Therefore, we investigated the mechanism of metabolic enzymes against high physiologic inflammatory response in vivo to study their biochemical properties in liver diseases. In this study, C57BL/6N mice were induced with hepatic inflammation by diethylnitrosamine(DEN) exposure. We observed upregulation of Cyp19a1, Hsd17b1, Cyplal, Sult1e1 in the DEN-treated livers compared to the control-treated livers using real time PCR. Moreover, the increased Cyp19a1 and Hsd17b1 levels support the possibility that estrogen biosynthesis from androgens are accumulated during inflammatory liver diseases. Furthermore, the increased levels of Cyp1a1 and Cyp1b1 in the hydroxylation of estrogen facilitated the conversion of estrogen to 2-or 4-hydroxyestrogen,respectively. In addition, the substantial increase in the Sultlel enzyme levels could lead to sulfate conjugation of hydroxyestrogen. The present information supports the concept that inflammatory response can sequester sulfate conjugates from the endogenous steroid hormones and may suppress binding of sex steroid hormones to their receptors in the whole body.

关键词： liver inflammation sex steroid hormone steroid metabolic enzyme cytochrome enzyme

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Younger patients have poorer biochemical outcome after radical prostatectomy in high-risk prostate cancer

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Asian Journal of Andrology 2011年第5期13卷 719-723页

作者： Sung Kyu hong Jung Soo Nam Woong Na Jong Jin Oh Cheol Yong Yoon Chang wook Jeong Hyun June Kim Seok-Soo Byun Sang Eun Lee Department of Urology Seoul National University Bundang Hospital Seongnam Kyunggi-do 463-707 Korea

The aim of this study was to investigate the prognostic significance of patient age with respect to tumour aggressiveness in men who underwent radical prostatectomy （RP） for prostate cancer. In this study, we reviewed the records of 743 patients who received RP without neoadjuvant or adjuvant therapy at our institution and were followed up for 〉2 years postoperatively. For our analyses, the patients were divided into two groups according to age： younger （〈60 years） and older （≥ 60 years）. Through uni- and multivariate analyses, associations of various clinicopathological parameters, including biochemical recurrence-free survival, with patient age, were evaluated among all patients, and the patients were stratified according to their D＇Amico risk classification. Among all subjects, younger （n= 126） and older （n=617） patients showed no significant differences regarding pathological parameters and biochemical recurrence-free survival （P=0.288）. For the high-risk group （n= 206）, younger patients had a lower rate of biochemical recurrence-free survival following surgery than older patients （P=0.017）, despite the fact that no significant differences were observed regarding various known prognostic parameters between the two age groups. In addition, multivariate analysis revealed that age was an independent predictor of biochemical recurrence-free survival among the high-risk group （P=O.O03）. Our results showed that relatively younger patients have a comparable biochemical outcome compared with their older counterparts following RP performed for prostate cancer. However, among patients with high-risk disease, younger patients have a worse biochemical outcome following RP compared with older patients.

关键词： age factors biochemical outcome prostate prostatic neoplasms prostatectomy

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Effects of obesity on lower urinary tract symptoms in Korean BPH patients

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Asian Journal of Andrology 2009年第6期11卷 663-668页

作者： seung Hwan Lee Joon Chul Kim Ji-Youl Lee Jang Hwan Kim Cheol Young Oh seung wook Lee Se Jeong Yoo Byung Ha Chung Department of Urology Yonsei University Health System Seoul 135-720 Korea Department of Urology The Catholic University of Korea Seoul 137-701 Korea Department of Urology Hallym University Chuncheon 200-704 Korea Department of Urology Eulji Medical Center Eulji University Seoul 139-230 Korea

We analyzed the effects of obesity on lower urinary tract symptoms （LUTSs） in Korean benign prostatic hyperplasia （BPH） patients. This is a multicenter, cross-sectional, prospective study conducted in four centers in Korea. A total of 602 men with LUTSs secondary to BPH were included. BPH/LUTSs cases were men aged ≥ 40 years with intemational prostate symptom scores （IPSS） ≥ 8 points. Height, weight and waist circumference were measured. Among the 602 patients, 156 patients had a waist circumference above 90 cm, representing central obesity, and 215 patients had a body mass index above 25 kg m2. Waist circumference was positively correlated with prostate volume （P = 0.034）. Men with waist circumference 〉 90 cm experienced a 1.36-fold increased risk of severe LUTSs （95% CI 0.82-2.41） compared with men with waist circumference ≤ 90 cm. Prostate volume was positively correlated with urgency and nocturia in men with central obesity. In this population of Korean men diagnosed with BPH, central obesity rather than overall obesity seems to be the more important predictor of LUTSs correlated with BPH.

关键词： benign prostatic hyperplasia central obesity lower urinary tract symptom prostate

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Survival outcome of patients with spontaneously ruptured hepatocellular carcinoma treated surgically or by transarterial embolization

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World Journal of Gastroenterology 2013年第28期19卷 4537-4544页

作者： Young-Joo Jin Jin-Woo Lee Seoung-wook Park Jung Il Lee Don Haeng Lee Young Soo Kim Soon Gu Cho Yong Sun Jeon Kun Young Lee seung-Ik Ahn Department of Internal Medicine Inha University Hospital Inha University School of Medicine Incheon 400-711 South Korea Department of Internal Medicine Yonsei University College of Medicine Seoul 120-752 South Korea Department of Internal Medicine and Center for Advanced Medical Education by Brain Korea 21 Project Inha University School of Medicine and Utah-Inha DDS and Advanced Therapeutics Research Center Incheon 400-711 South Korea Department of Radiology Inha University Hospital Inha University School of Medicine Incheon 400-711 South Korea Department of Surgery Inha University Hospital Inha University School of Medicine Incheon 400-711 South Korea

AIM: To evaluate clinical outcomes of patients that underwent surgery, transarterial embolization (TAE), or supportive care for spontaneously ruptured hepatocellular carcinoma (HCC). METHODS: A consecutive 54 patients who diagnosed as spontaneously ruptured HCC at our institution between 2003 and 2012 were retrospectively enrolled. HCC was diagnosed based on the diagnostic guidelines issued by the 2005 American Association for the Study of Liver Diseases. HCC rupture was defined as disruption of the peritumoral liver capsule with enhanced fluid collection in the perihepatic area adjacent to the HCC by dynamic liver computed tomography, and when abdominal paracentesis showed an ascitic red blood cell count of > 50000 mm 3 /mL in bloody fluid. RESULTS: Of the 54 patients, 6 (11.1%) underwent surgery, 25 (46.3%) TAE, and 23 (42.6%) supportive care. The 2-, 4and 6-mo cumulative survival rates at 2, 4 and 6 mo were significantly higher in the surgery (60%, 60% and 60%) or TAE (36%, 20% and 20%) groups than in the supportive care group (8.7%, 0% and 0%), respectively (each, P < 0.01), and tended to be higher in the surgical group than in the TAE group. Multivariate analysis showed that serum bilirubin (HR = 1.09, P < 0.01), creatinine (HR = 1.46, P = 0.04), and vasopressor requirement (HR = 2.37, P = 0.02) were significantly associated with post-treatment mortality, whereas surgery (HR = 0.41, P < 0.01), and TAE (HR = 0.13, P = 0.01) were inversely associated with posttreatment mortality. CONCLUSION: Post-treatment survival after surgery or TAE was found to be better than after supportive care, and surgery tended to provide better survival benefit than TAE.

关键词： Ruptured hepatocellular carcinoma Surgery Transarterial embolization

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Single hepatocellular carcinoma ≤ 3 cm in left lateral segment:Liver resection or radiofrequency ablation?

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World Journal of Gastroenterology 2014年第14期20卷 4059-4065页

作者： Jong Man Kim Tae wook Kang Choon Hyuck David Kwon Jae-Won Joh Justin Sangwook Ko Jae Berm Park Hyunchul Rhim Joon Hyeok Lee Sung Joo Kim seung Woon Paik Department of Surgery Samsung Medical CenterSungkyunkwan University School of Medicine Department of Radiology and Center for Imaging Science Samsung Medical CenterSungkyunkwan University School of Medicine Department of Anesthesiology and Pain Medicine Samsung Medical CenterSungkyunkwan University School of Medicine Division of Gastroenterology Department of MedicineSamsung Medical CenterSungkyunkwan University School of Medicine

AIM: To evaluate the long-term results of radiofrequency ablation (RFA) compared to left lateral sectionectomy (LLS) in patients with Child-Pugh class A disease for the treatment of single and small hepatocellular car... 详细信息

关键词： Small hepatocellular carcinoma Left lateral segment Radiofrequency ablation Liver resection Tumor recurrence Survival

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Analgesic efficacy of median nerve stimulation in mice with chemotherapy-induced peripheral neuropathy via modulation of brain-derived neurotrophic factor expression

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Journal of Traditional Chinese Medicine 2023年第4期43卷 686-694页

作者： Dong-wook Kang Jae-Gyun Choi Hee Ju Song Jaehyuk Kim Miae Lee Taehee Kim Suk-Yun Kang Yeonhee Ryu Hwa seung Yoo Jin Sun Lee Jin Bong Park Sang Do Lee Hyun-Woo Kim Department of Physiology and Medical Science College of Medicine and Brain Research InstituteChungnam National UniversityDaejeon 35015Republic of Korea KM Fundamental Research Division Korea Institute of Oriental Medicine Daejeon 34054Republic of Korea East-West Cancer Center Dunsan Korean Medicine Hospital of Daejeon UniversityDaejeon 35234Republic of Korea Department of Surgery Chungnam National University HospitalDaejeon 35015Republic of Korea Laboratory of Veterinary Pharmacology College of Veterinary Medicine and Research Institute for Veterinary ScienceSeoul National University1 Gwanak-roGwanak-guSeoul 08826Republic of Korea

OBJECTIVE:Chemotherapeutic agents such as docetaxel(DTX)can trigger chemotherapy-induced peripheral neuropathy(CIPN),which is characterized by unbearable *** study was designed to investigate the analgesic effect and related neuronal mechanism of low-frequency median nerve stimulation(LFMNS)on DTX-induced tactile hypersensitivity in ***:To produce CIPN,DTX was administered intraperitoneally 4 times,once every 2 d,to male ICR *** was performed on the wrist area,and the pain response was measured using von Frey filaments on both hind *** blot and immunofluorescence staining were performed using dorsal root ganglion and spinal cord samples to measure the expression of brainderived neurotrophic factor(BDNF).RESULTS:Repeated LFMNS significantly attenuated the DTX-induced abnormal sensory response and suppressed the enhanced expression of BDNF in the DRG neurons and spinal dorsal ***:LFMNS might be an effective nonpharmaceutical option for treating patients suffering from CIPN via regulating the expression of peripheral and central BDNF.

关键词： analgesia brain-derived neurotrophic factor chemotherapy-induced peripheral neuropathy docetaxel nerve stimulation

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