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Parameterization of below-cloud scavenging for polydisperse fine mode aerosols as a function of rain intensity

Journal of Environmental Sciences 2023年第10期132卷 43-55页

作者： Chang hoon Jung Hyung-Min Lee Dasom Park Young Jun Yoon Yongjoo Choi Junshik Um Seoung Soo Lee ji Yi Lee Yong Pyo Kim Department of Health Management Kyungin Women’s UniversityIncheon 21041Korea Department of Environmental Science and Engineering Ewha Woman’s UniversitySeoulKorea Department of Environmental Engineering Konkuk UniversitySeoulKorea Korea Polar Research Institute IncheonKorea Department of Environment Hankuk University of Foreign StudiesYonginKorea Department of Atmospheric Sciences Pusan National UniversityBusanKorea Earth System Science Interdisciplinary Center University of MarylandCollege ParkMDUSA Research Center for Climate Sciences Pusan National UniversityBusanKorea Department of Chemical Engineering and Materials Science Ewha Womans UniversitySeoulKorea

The below-cloud aerosol scavenging process by precipitation is one of the most important mechanisms to remove aerosols from the *** to its complexity and dependence on both aerosol and raindrop sizes,wet scavenging process has been poorly treated,especially during the removal of fine *** makes the numerical simulation of below-cloud scavenging in large-scale aerosolmodels *** consider the slip effects of submicron particles,a simplified expression for the diffusion scavenging was developed by approximating the Cunningham slip correction *** derived analytic solution was parameterized as a simple power function of rain intensity under the assumption of the lognormal size distribution of *** resultant approximated expression was compared to the observed data and the results of previous studies including a 3D atmospheric chemical transport model *** with the default GEOS-Chem coefficient of 0.00106R0.61 and the observation-based coefficient of 0.0144R0.9268,the coefficient of a and b in∧m=aRb spread in the range of 0.0002-0.1959 for a and 0.3261-0.525 for b over a size distribution of GSD of 1.3–2.5 and a geometric mean diameter of 0.01-2.5μ***,this study showed that the scavenging coefficient varies widely by orders of magnitude according to the size distribution of particles and rain *** study also demonstrated that the obtained simplified expression could consider the theoretical approach of aerosol *** proposed analytic approach showed that results can be effectively applied for reduced computational burden in atmospheric modeling.

关键词： Below-cloud scavenging Polydisperse aerosol Parameterization Cunningham correction factor Scavenging coefficient

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Reactive oxygen species involved in sulforaphane-induced STAT3 inactivation and apoptosis in DU145 prostate cancer cells

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Chinese Science Bulletin 2010年第34期55卷 3922-3928页

作者： KOH Wonil ahn Kwang Seok JEONG Soo-jin LEE Hyo-Jung KIM Minseok LEE Hyo-Jeong LEE Eun-Ok KIM Sung-hoon College of Oriental Medicine Kyung Hee University College of Dental Medicine Tufts UniversityBoston

Signal transducer and activator of transcription factor 3(STAT3)is a transcription factor that regulates various cellular processes such as proliferation,survival and angiogenesis in cancer *** the present study,we investigated the mechanisms whereby isothiocyanate sulforaphane(SFN)suppresses STAT3 activation in DU145 prostate cancer *** significantly inhibited SFN-inhibited STAT3 phosphorylation at Tyr705 as well as the deoxyribonucleic acid(DNA)binding capability in electrophoresis mobility shift assay(EMSA)in time-and concentration-dependent *** also abrogated the Janus activated kinase 2(JAK2)*** addition,SFN down-regulated STAT3-related gene products including Bcl-2,Bcl-xL,and cyclin D1 and vascular endothelial growth factor(VEGF),and inhibited the proliferation and induced ***,SFN mediated reactive oxygen species(ROS)production at the early ***,these results demonstrate that ROS generation may be involved in the inhibition of JAK2/STAT3 activation and apoptosis in DU145 cells.

关键词：前列腺癌细胞 STAT3 细胞凋亡活性氧活化诱导硫素萝卜

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Bioreduction of nitrate in groundwater using a pilot-scale hydrogen-based membrane biofilm reactor

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Frontiers of Environmental Science & Engineering 2010年第3期4卷 280-285页

作者： Youneng TANG Michal ZIV-EL Chen ZHOU Jung Hun SHIN Chang hoon ahn Kerry MEYER Daniel CANDELARIA David FRIESE Ryan OVERSTREET Rick SCOTT Bruce ERITTMANN Center for Environmental Biotechnology Biodesign Institute at Arizona State UniversityTempeAZ 85287USA CH2M Hill EnglewoodCO 80112USA Applied Process Technology Inc.Pleasant HillCA 94523USA City of Glendale GlendaleAZ 85303USA

A long-term pilot-scale H_(2)-based membrane biofilm reactor(MBfR)was tested for removal of nitrate from actual groundwater.A key feature of this secondgeneration pilot MBfR is that it employed lower cost polyester hollow fibers and still achieved high loading *** steady-state maximum nitrate surface loading at which the effluent nitrate and nitrite concentrations were below the Maximum Contaminant Level(MCL)was at least 5.9 g·N·(m^(2)·d)^(–1),which corresponds to a maximum volumetric loading of at least 7.7 kg·N·(m^(3)·d)^(–1).The steady-state maximum nitrate surface area loading was higher than the highest nitrate surface loading reported in the firstgeneration MBfRs using composite fibers(2.6 g·N·(m^(2)·d)^(–1)).This work also evaluated the H_(2)-utilization efficiency in *** measured H_(2)supply rate was only slightly higher than the stoichiometric H_(2)-utilization ***,H_(2)utilization was controlled by diffusion and was close to 100%efficiency,as long as biofilm accumulated on the polyester-fiber surface and the fibers had no leaks.

关键词： denitrification groundwater treatment hydrogen membrane biofilm reactor(MBfR) polyester fiber

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Identifying and Verifying Vulnerabilities through PLC Network Protocol and Memory Structure Analysis

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Computers, Materials & Continua 2020年第10期65卷 53-67页

作者： Joo-Chan Lee Hyun-Pyo Choi Jang-hoon Kim Jun-Won Kim Da-Un Jung ji-Ho Shin Jung-Taek Seo Department of Information Security Engineering Soonchunhyang UniversityAsan31538Korea

Cyberattacks on the Industrial Control System(ICS)have recently been increasing,made more intelligent by advancing *** such,cybersecurity for such systems is attracting *** a core element of control devices,the Programmable Logic Controller(PLC)in an ICS carries out on-site control over the ICS.A cyberattack on the PLC will cause damages on the overall ICS,with Stuxnet and Duqu as the most representative ***,cybersecurity for PLCs is considered essential,and many researchers carry out a variety of analyses on the vulnerabilities of PLCs as part of preemptive efforts against *** this study,a vulnerability analysis was conducted on the XGB *** vulnerabilities were identified by analyzing the network protocols and memory structure of PLCs and were utilized to launch replay attack,memory modulation attack,and FTP/Web service account theft for the verification of the *** on the results,the attacks were proven to be able to cause the PLC to malfunction and disable it,and the identified vulnerabilities were defined.

关键词： Industrial control system programmable logic controller cybersecurity network protocol vulnerability

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Development of a 3D subcutaneous construct containing insulin-producing beta cells using bioprinting

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Bio-Design and Manufacturing 2022年第2期5卷 265-276页

作者： Chi B.ahn ji-Hyun Lee Joo H.Kim Tae H.Kim Hee-Sook Jun Kuk H.Son jin W.Lee Department of Molecular Medicine College of MedicineGachon University155Gaetbeol-roYeonsu-kuIncheonRepublic of Korea Department of Health Sciences and Technology GAIHSTGachon University155Gaetbeol-roYeonsu-kuIncheonRepublic of Korea College of Pharmacy Gachon University191Hambangmoe-roYeonsu-kuIncheonRepublic of Korea Department Thoracic and Cardiovascular Surgery Gachon University Gil Medical CenterCollege of MedicineGachon University21Namdong-daero 774 beon-gilNamdong-guIncheonRepublic of Korea

Type 1 diabetes is caused by insulin deficiency due to the loss of beta cells in the islets of *** severe cases,islet transplantation into the portal vein is ***,due to the loss of transplanted islets and the failure of islet function,the 5-year insulin independence rate of these patients is<50%.In this study,we developed a long-term,insulin-secreting,3 Dbioprinted construct implanted subcutaneously with the aim of preventing islet *** bioprinted construct was fabricated by the multi-layer bioprinting of beta-cell(mouse insulinoma-6:MIN-6)-encapsulated alginate bioink and poly(caprolactone)biodegradable polymer.A glucose response assay revealed that the bioprinted constructs proliferated and released insulin normally during the 4-week in vitro *** MIN-6 generated clusters with a diameter of 100-200μm,similar to the original pancreatic islets in the *** an in vivo study using type 1 diabetes mice,animals implanted with bioprinted constructs showed three times higher insulin secretion and controlled glucose levels at 8 weeks after *** the implanted,bioprinted constructs had a positive effect on insulin secretion in the experimental animals,the survival rate of the implanted group(75%)was three times higher than that of the non-implanted group(25%).The results suggest that the proposed,3 D-bioprinted,subcutaneous construct can be a better alternative to portal vein islet transplantation.

关键词： 3D bioprinting Subcutaneous construct Type 1 diabetes Insulin Beta cells

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Sex-based differences in histology,staging,and prognosis among 2983 gastric cancer surgery patients

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World Journal of Gastroenterology 2022年第9期28卷 933-947页

作者： Yonghoon Choi Nayoung Kim Ki Wook Kim Hyeong Ho Jo Jaehyung Park Hyuk Yoon Cheol Min Shin Young Soo Park Dong Ho Lee Hyeon Jeong Oh Hye Seung Lee Young Suk Park Sang-hoon ahn Yun-Suhk Suh Do Joong Park Hyung-Ho Kim ji-Won Kim jin Won Kim Keun-Wook Lee Won Chang ji hoonPark Yoon jin Lee Kyoung Ho Lee Young hoon Kim Department ofInternal Medicine Seoul National University Bundang HospitalSeongnam 13620South Korea Nayoung Department of Internal Medicine Seoul National University College of MedicineSeoul 03080South Korea Department of Pathology Seoul National University Bundang HospitalSeongnam 13620South Korea Department of Pathology Seoul National University College of MedicineSeoul 03080South Korea Department of Surgery Seoul National University Bundang HospitalSeongnam 13620South Korea Department of Surgery Seoul National University College of MedicineSeoul 03080South Korea Department of Radiology Seoul National University Bundang HospitalSeongnam 13620South Korea Department of Radiology Seoul National University College of MedicineSeoul 03080South Korea

BACKGROUND Few studies have been conducted on sex differences in the incidence, pathophysiology, and prognosis of gastric cancer(GC).AIM To analyze the differences in GC characteristics according to sex in patients who underwent surgical treatment for *** A total of 2983 patients diagnosed with gastric adenocarcinoma who received surgical treatment at the Seoul National University Bundang Hospital between 2003 and 2017 were *** clinicopathological characteristics, histologic type of GC, overall and GC-specific survival rates, and associated risk factors were *** Among the 2983 patients, 2005(67.2%) and 978(32.8%) were males and females, *** average age of the female group(59.36 years) was significantly younger than that of the male group(61.66 years;P < 0.001).Cancer of the gastric body(P < 0.001) and diffuse-type histology(P < 0.001) were more common in females than in *** trend was more prominent in females younger than 60 years of age, with a significantly higher proportion of diffuse-type cancer than in the male *** of sex, diffuse-type GC was more common in younger patients, and the proportion of intestinal-type GC increased with *** overall survival rate was significantly higher in females(P < 0.001).However, this difference disappeared for GC-specific survival(P = 0.168), except for the poor GC-specific survival rate in advanced-stage cancer(stage Ⅲ or above) in females(P = 0.045).The risk factors for GC-related mortality were older age, upper location of GC, and diffuse-or mixed-type *** terms of comorbidities, more males died from diseases other than GC, including other malignancies such as lung cancer, hepatocellular carcinoma, and pancreatic cancer, and respiratory diseases such as interstitial lung disease and chronic obstructive pulmonary disease, while there were relatively more cardiovascular or cerebrovascular deaths in *** Sex-based differences in GC were

关键词： Gastric cancer Histology Prognosis Sex difference Survival

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Treatment of Bone Defect with Modular Metal Augmentation Using a Downsized Block in Total Knee Arthroplasty: Technical Note and Report of 17 Cases

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Open Journal of Orthopedics 2016年第9期6卷 268-275页

作者： Su Chan Lee Chang Hyun Nam Seung Hyun Hwang ji-hoon Baek Soon Yong Yoo Hye Sun ahn Joint & Arthritis Research Department of Orthopaedic Surgery Himchan Hospital Seoul Korea

In total knee arthroplasty (TKA), a treatment of bone defect varies depending on the location and extent of defect and requires proper surgical procedure. Metal augmentation is readily available for both femoral and tibial bone defects. We report the operative technique of modular metal augmentation using a downsized block for ambiguous proximal tibial and distal femoral bone defects in primary and revision TKA. Regarding bone defects, bone loss can be minimized by using a different size of metal augmentation, and suitable reinforcement for bone defects can be achieved. Once our technique is properly used, it will be very helpful in treating bone defects.

关键词： Total Knee Arthroplasty Bone Defect Metal Augmentation

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CT and MR imaging findings of ocular adnexal mucosa-associated lymphoid tissue lymphoma associated with IgG4-related disease: multi-institutional case series

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International Journal of Ophthalmology(English edition) 2020年第8期13卷 1231-1237页

作者： Roh-Eul Yoo Sun-Won Park Jung Hyo Rhim ji Eun Kim Soo Chin Kim ji-Young Choe Ho-Kyung Choung Sang In Khwarg ji-hoon Kim Jeong Hyun Lee Bo Eun Lee Yeonah Kang Department of Radiology Seoul National University College of MedicineSeoul 03080Republic of Korea Department of Radiology Seoul National University HospitalSeoul 03080Republic of Korea Department of Radiology Seoul Metropolitan Government Seoul National University Boramae Medical CenterSeoul 07061Republic of Korea Department of Pathology Seoul Metropolitan Government Seoul National University Boramae Medical CenterSeoul 07061Republic of Korea Department of Pathology Seoul National University College of MedicineSeoul 03080Republic of Korea Department of Radiology Asan Medical CenterSeoul 05505Republic of Korea Department of Pathology Hallym University Sacred Heart HospitalAnyang14068Republic of Korea Department of Ophthalmology Seoul Metropolitan Government Seoul National University Boramae Medical CenterSeoul 07061Republic of Korea Department of Ophthalmology Seoul National University College of MedicineSeoul 03080Republic of Korea Department of Radiology Ulsan University College of MedicineSeoul 05505Republic of Korea Department of Radiology Inje University Haeundae Paik HospitalBusan 47392Republic of Korea

AIM:To report CT and MR imaging findings of ocular adnexal mucosa-associated lymphoid tissue lymphoma associated with IgG4-related disease(IgG4-MALT lymphoma),a rare but clinically important complication of ocular adnexal IgG4-related ***:We retrospectively reviewed all cases of histologically confirmed ocular adnexal IgG4-related disease at three ter tiary and one secondary referral centers,between February 2003 and December *** cases of histopathologically diagnosed IgG4-MALT lymphoma were *** and MR images were analyzed by consensus of two experienced head and neck ***:Lacrimal glands were the main site of involvement in all seven *** lesions typically showed well-demarcated margins,iso-to hyperattenuation on precontrast CT,T2 hypo-to isointensity,T1 isointensity,and homogenous internal architecture with homogenous enhancement *** were mostly hyperdense and isointense to normal extraocular muscles on postcontrast CT and MR images,***:Unlike in typical ocular adnexal IgG4-related disease,T2 isointensity and hyperattenuation on precontrast CT images were noted in some IgG4-MALT lymphoma *** the findings may be nonspecific,the possibility of accompanying MALT lymphoma may need to be considered,when ocular adnexal lesions in patients clinically suspected of having IgG4-related disease are refractory to glucocorticoids and show T2 isointensity and hyperattenuation on precontrast CT for the optimal management of the ***,this is a case series of a very rare complication of ocular adnexal IgG4-related disease,and thus caution is warranted to generalize the conclusion.

关键词： CT IgG4-related disease MR ocular adnexal mucosa-associated lymphoid tissue lymphoma

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Reduction of gastrointestinal motility by unilateral thyroparathyroidectomy plus subdiaphragmatic vagotomy in rats

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World Journal of Gastroenterology 2012年第33期18卷 4570-4577页

作者： Jun Ho Lee Oh Deog Kwon Seon Ho ahn Keun Han Choi ji Hye Park Seoul Lee Bong Kyu Choi Kyu Yong Jung Department of Pharmacology Wonkwang University School of Medicine Jeonbuk 570-749 South Korea Department of Clinical Pathology College of Veterinary Medicine Kyungpook National University Daegu 702-701 South Korea Department of Internal Medicine Wonkwang University School of Medicine Jeonbuk 570-749 South Korea

AIM: To investigate whether the combined methods of unilateral thyroparathyroidectomy (TPX) and subdiaphragmatic vagotomy (VAX) can be adapted for rats and used as a reliable method to produce a rat model of long-term reduction of gastrointestinal (GI) motor function. METHODS: Male Sprague-Dawley rats were randomly divided into 3 groups, normal, sham-operated and unilateral TPX plus VAX. The TPX plus VAX rats received VAX 7 d after application of TPX, and dietary intake and fecal output were then measured daily for 1 *** completion of the experiments, gastric emptying and small bowel transit were measured in vivo, and the contractile responses of colonic strips to excitatory and inhibitory neurotransmitters were estimated using isometric force transducers in vitro. RESULTS: In comparison with normal and sham-operated rats, rats which received unilateral TPX plus VAX showed a significant decrease in body weight and in fecal pellet number and weight throughout the entire week. Application of TPX plus VAX to rats markedly delayed gastric emptying and small bowel transit. In TPX plus VAX rats, the longitudinal muscles of the proximal colon showed a significant reduction in contractile responses to acetylcholine (5 × 10-6 mol/L), and a dramatic attenuation of contractile responses was also observed in both the longitudinal and circular muscles of the distal colon. However, the spontaneous contractility of the colonic strips from TPX plus VAX rats was not significantly affected by treatment with N-nitro-Larginine-methyl ester (0.1 mol/L). CONCLUSION: The results indicate that unilateral TPX plus VAX reduced the motor function of the GI tract in rats, and the reduced gut motility is likely mediated, at least in part, by inhibition of the excitatory neurotransmitter system.

关键词： Unilateral thyroparathyroidectomy Subdiaphragmatic vagotomy Gastric emptying Small bowel transit Rat

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Endoscopic fibrin glue injection for closure of pancreatocutaneous fistula following transgastric endoscopic necrosectomy

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World Journal of Gastroenterology 2008年第39期14卷 6093-6095页

作者： ji Woong Jang Do Hyun Park Sung-hoon Moon Sang Soo Lee Dong Wan Seo Sung Koo Lee Myung-Hwan Kim Division of Gastroenterology Department of Internal MedicineUniversity of Ulsan College of MedicineAsan Medical CenterSeoul 138-736South Korea

Transgastric endoscopic necrosectomy has been recently introduced as the effective and alternative management of infected pancreatic necrosis and pancreatic abscess. However,up to 40% of patients who undergo endoscopic necrosectomy may need an additional percutaneous approach for subsequent peripancreatic fluid collection or non-resolution of pancreatic necrosis. This percutaneous approach may lead to persistent pancreatocutaneous fistula,which remains a serious problem and usually requires prolonged hospitalization,or even open-abdominal surgery. We describe the first case of pancreatocutaneous fistula and concomitant abdominal wall defect following transgastric endoscopic necrosectomy and percutaneous drainage,which were endoscopically closed with fibrin glue injection via the necrotic cavity.

关键词： Fibrin glue Pancreatocutaneous fistula Infected pancreatic necrosis Pancreatic abscess Endoscopic necrosectomy

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