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Influence of volcanic activity on vegetation succession and growth environment on the hillslope of Sakurajima Volcano in southern Kyushu,Japan

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Journal of Forestry Research 2017年第2期28卷 309-317页

作者： Yukiyoshi Teramoto Etsuro Shimokawa Tsugio Ezaki Kun-Woo Chun suk-Woo kim Youn-tae Lee Faculty of Agriculture Kagoshima UniversityKagoshima 890-0065Japan Faculty of Agriculture Ehime UniversityMatsuyama 790-8566Japan Division of Forest Science Kangwon National UniversityChuncheon 24341Republic of Korea Department of Forestry and Environmental Systems Graduate SchoolKangwon National UniversityChuncheon 24341Republic of Korea

This study was conducted in order to examine the influence of long-term volcanic activity on vegetative succession and growth on the slope of Sakurajima in southern Kyushu, Japan. We investigated the vegetation,depth of the volcanic ash layer, and dry density and p H of the surface soil at six places on the north-northwestern slope, 2.3–3.4 km from the Minami-dake crater, where a layer of pumice stone was deposited by the Taisho eruption in 1914. The height and diameter at breast height（DBH） of the trees increased with increasing distance from the Minami-dake crater, as did the number of individuals and species, and basal area. The Shannon–Wiener diversity index（H＇） demonstrates that vegetative succession is significantly affected by distance from the Minami-dake crater, as areas farther from the crater exhibited later seral stages. Comparison of the diversity index and species number of the crater region with that of the climax forest in Kagoshima indicates that vegetative growth alone cannot advance succession in the study area, as the local vegetative community is heavily influenced by the harsh environmental conditions associated with continual exposure to long-term volcanic activity. Seral stage, ash layer depth,dry density, and p H of the soil surface layer are governed by distance from the Minami-dake crater. The results of this study indicate that conditions for vegetative growth and succession improve with increasing distance from the source of constant volcanic activity. Thus, soil development is promoted by the acidification of the soil, which decreases the dry density and p H of the soil surface *** introduction of plant species resistant to volcanic ash and gas is recommended to promote soil development and improve the infiltration capacity of the soil.

关键词： volcanic succession vegetation vegetative northwestern eruption basal leaved gentle harsh

Optical Gain Analysis of Graded InGaN/GaN Quantum-Well Lasers

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Chinese Physics Letters 2011年第7期28卷 319-322页

作者： Seoung-Hwan Park Yong-tae Moon Jeong Sik Lee Ho ki Kwon Joong Seo Park Doyeol Ahn Department of Electronics Engineering Catholic University of DaeguHayangKyeongsanKyeongbuk 712-702Republic of Korea SLED R&D Center LG Innotek16 Woomyeon-dongSeocho-guSeoul 137-140Republic of Korea Department of Electrical and Computer Engineering University of SeoulSeoul 130-743Republic of Korea

Optical properties of graded InGaN/GaN quantum well(QW)lasers are analyzed as improved gain media for laser diodes emitting near 500 *** results are compared with those of conventional InGaN/GaN QW *** heavy-hole effective mass around the topmost valence band is found to nearly not be affected by the inclusion of the graded *** graded InGaN/GaN QW structure shows a much larger matrix element than the conventional InGaN/GaN QW *** radiative current density dependences of the optical gain are similar to each ***,the graded QW structure is expected to have lower threshold current density than the conventional QW structure because the former has a lower threshold carrier density than the latter.

关键词： InGaN/GaN graded Lasers

Spectrum of mucin-producing neoplastic conditions of the abdomen and pelvis:Cross-sectional imaging evaluation

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World Journal of Gastroenterology 2011年第43期17卷 4757-4771页

作者： Nam Kyung Lee suk kim Hyun Sung kim tae Yong Jeon Gwang Ha kim Dong Uk kim Do Youn Park tae Un kim Dae Hwan Kang Department of Radiology Pusan National University Hospital Medical Research Institute Pusan National University School of Medicine Pusan National University Department of Surgery Pusan National University Hospital Department of Internal Medicine Pusan National University Hospital Department of Pathology Pusan National University Hospital Department of Radiology Yangsan Pusan National University Hospital Medical Research Institute Pusan National University School of Medicine Department of Internal Medicine Yangsan Pusan National University Hospital

Various mucin-producing neoplasms originate in different abdominal and pelvic *** neoplasms differ from non-mucinous neoplasms because of the differences in clinical outcome and imaging *** carcinoma,in which at least 50%of the tumor is composed of large pools of extracellular mucin and columns of malignant cells,is associated with a worse *** ring cell carcinoma is characterized by large intracytoplasmic mucin vacuoles that expand in the malignant cells with the nucleus displaced to the *** prognosis is also generally *** contrast,intraductal papillary mucinous neoplasm of the bile duct and pancreas,which is characterized by proliferation of ductal epithelium and variable mucin production,has a better prognosis than other malignancies in the pancreaticobiliary *** modalities play a critical role in differentiating mucinous from non-mucinous *** to high water content,mucin has a similar appearance to water on ultrasound(US) ,computed tomography(CT) ,and magnetic resonance imaging,except when thick and proteinaceous,and then it tends to be hypoechoic with fine internal echoes or have complex echogenicity on US,hyperdense on CT,and hyperintense on T1and hypointense on T2-weighted images,compared to ***,knowledge of characteristic mucin imaging features is helpful to diagnose various mucinproducing neoplastic conditions and to facilitate appropriate treatment.

关键词：恶性肿瘤生产条件黏液性影像学腹部横断面计算机断层扫描评价

LDHA Desuccinylase Sirtuin 5 as A Novel Cancer Metastatic Stimulator in Aggressive Prostate Cancer

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Genomics, Proteomics & Bioinformatics 2023年第1期21卷 177-189页

作者： Oh Kwang Kwon In Hyuk Bang So Young Choi Ju Mi Jeon Ann-Yae Na Yan Gao Sam Seok Cho Sung Hwan ki Youngshik Choe Jun Nyung Lee Yun-Sok Ha Eun Ju Bae tae Gyun Kwon Byung-Hyun Park Sangkyu Lee BK21 Plus KNU Multi-Omics Based Creative Drug Research Team College of PharmacyResearch Institute of Pharmaceutical SciencesKyungpook National UniversityDaegu 41566Republic of Korea Department of Biochemistry and Molecular Biology Chonbuk National University Medical SchoolJeonjuJeonbuk 54896Republic of Korea College of Pharmacy Chosun UniversityGwangju 61452Republic of Korea Korea Brain Research Institute Daegu 41068Republic of Korea Department of Urology School of MedicineKyungpook National UniversityDaegu 41566Republic of Korea Department of Urology Kyungpook National University HospitalDaegu 41566Republic of Korea College of Pharmacy Chonbuk UniversityJeonjuJeonbuk 54896Republic of Korea School of Pharmacy Sungkyunkwan UniversitySuwon 16419Republic of Korea

Prostate cancer(PCa)is the most commonly diagnosed genital cancer in men *** 80%of the patients who developed advanced PCa suffered from bone metastasis,with a sharp drop in the survival *** great efforts,the detailed mechanisms underlying castration-resistant PCa(CRPC)remain *** 5(SIRT5),an NAD+-dependent desuccinylase,is hypothesized to be a key regulator of various ***,compared to other SIRTs,the role of SIRT5 in cancer has not been extensively ***,we revealed significantly decreased SIRT5 levels in aggressive PCa cells relative to the PCa *** correlation between the decrease in the SIRT5 level and the patient’s reduced survival rate was also *** quantitative global succinylome analysis,we characterized a significant increase in the succinylation at lysine 118(K118su)of lactate dehydrogenase A(LDHA),which plays a role in increasing LDH *** a substrate of SIRT5,LDHA-K118su significantly increased the migration and invasion of PCa cells and LDH activity in PCa *** study reveals the reduction of SIRT5 protein expression and LDHA-K118su as a novel mechanism involved in PCa progression,which could serve as a new target to prevent CPRC progression for PCa treatment.

关键词： Sirtuin 5 Lactate dehydrogenase A Lysine succinylation PCa progression

Application of powdered activated carbon coating to fabrics in a hybrid filter to enhance mercury removal

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Journal of Environmental Sciences 2019年第6期31卷 58-65页

作者： Jin-Ho Sung Seung-ki Back Eun-Song Lee Ha-Na Jang Yong-Chil Seo Youn-suk Kang Myong-Hwa Lee Department of Environmental Engineering Yonsei University J-E Tech Co. Ltd Department of Environmental Engineering Kangwon National University

Elemental mercury(Hg0) is predominant constituent of flue gas emitted from coal-fired power plants. Adsorption has been considered the best available technology for removal of Hg0 from flue gas. However, adsorbent injection increases the amount of ash generated. In the present study, powdered activated carbon(PAC) was coated on polytetrafluoroethylene/glass fiber filters to increase Hg0 removal while concurrently reducing the amount of ash generated. The optimal PAC coating rate was determined in laboratory experiments to ensure better Hg0 removal with low pressure drop. When PAC of particle size less than 45 μm was used, and the areal density was 50 g/m2, the pressure drop remained under 30 Pa while the Hg0 removal efficiency increased to 15.8% from4.3%. The Hg0 removal efficiency also increased with decrease in filtration velocity. The optimal PAC coating rate was applied on a hybrid filter(HF), which was combined with a bag filter and an electrostatic precipitator in a single chamber. Originally designed to remove fine particulates matter, it was retrofitted to the flue gas control device for simultaneous Hg0 removal. By employing the PAC coating, the Hg removal efficiency of the HF increased to 79.79% from 66.35%. Also, a temporary reduction in Hg removal was seen but this was resolved following a cleaning cycle in which the dust layer was removed.

关键词： Mercury Hybrid filter Activated carbon Coating filter Coal-fired power plant

The association of stromal antigen 3(STAG3) sequence variations with spermatogenic impairment in the male Korean population

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Asian Journal of Andrology 2020年第1期22卷 106-111页

作者： Yeojung Nam Kyung Min Kang Se Ra Sung Ji Eun Park Yun-Jeong Shin Seung Hun Song Ju tae Seo tae ki Yoon Sung Han Shim Department of Biomedical Science College of Life ScienceCHA UniversitySeongnam 13488Korea Genetics Laboratory Fertility Center of CHA Gangnam Medical CenterCHA UniversitySeoul 06135Korea Department of Urology CHA Gangnam Medical CenterCHA UniversitySeoul 06135Korea Department of Urology Cheil General HospitalSeoul 04619Korea Department of Obstetrics and Gynecology CHA Gangnam Medical CenterSeoul 04637Korea

The stromal antigen 3(STAG3)gene,encoding a meiosis-specific cohesin component,is a strong candidate for causing male infertility,but little is known about this gene so *** identified STAG3 in patients with nonobstructive azoospermia(NOA)and normozoospermia in the Korean *** coding regions and their intron boundaries of STAG3 were identified in 120 Korean men with spermatogenic impairments and 245 normal controls by using direct sequencing and haplotype analysis.A total of 30 sequence variations were identified in this *** the total,seven were exonic variants,18 were intronic variants,one was in the 5’-UTR,and four were in the 3'-*** variations that directly caused NOA were not ***,two variants,c.3669+35C>G(rs1727130)and+198A>T(rs1052482),showed significant differences in the frequency between the patient and control groups(P=0.021,odds ratio[OR]:1.79,95%confidence interval[Cl]:1.098-2.918)and were tightly linked in the linkage disequilibrium(LD)*** pmir-rs1052482A was cotransfected with miR-3162-5p,there was a substantial decrease in luciferase activity,compared with *** result suggests that rsl052482 was located within a binding site of miR-3162-5p in the STAG33'-UTR,and the minor allele,the rs1052482T polymorphism,might offset inhibition by *** are the first to identify a total of 30 single-nucleotide variations(SNVs)of STAG3 gene in the Korean *** found that two SNVs(rs1727130 and rsl052482)located in the 3'-UTR region may be associated with the NOA *** findings contribute to understanding male infertility with spermatogenic impairment.

关键词： linkage disequilibrium meiotic-specific gene single-nucleotide variations spermatogenic impairment stromal antigen 3 gene

A simple,sensitive and non-destructive technique for characterizing bovine dental enamel erosion:attenuated total reflection Fourier transform infrared spectroscopy

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International Journal of Oral Science 2016年第1期8卷 54-60页

作者： In-Hye kim Jun Sik Son Bong ki Min Young Kyoung kim Kyo-Han kim tae-Yub Kwon Department of Dental Science Graduate SchoolKyungpook National UniversityDaeguKorea Korea Textile Development Institute DaeguKorea Center for Research Facilities Yeungnam UniversityGyeongsanKorea Department of Conservative Dentistry School of DentistryKyungpook National UniversityDaeguKorea Department of Dental Biomaterials School of DentistryKyungpook National UniversityDaeguKorea

Although many techniques are available to assess enamel erosion in vitro, a simple, non-destructive method with sufficient sensitivity for quantifying dental erosion is required. This study characterized the bovine dental enamel erosion induced by various acidic beverages in vitro using attenuated total reflection Fourier transform infrared （ATR-FTIR） spectroscopy. Deionized water （control） and 10 acidic beverages were selected to study erosion, and the pH and neutralizable acidity were measured. Bovine anterior teeth （110） were polished with up to 1 200-grit silicon carbide paper to produce flat enamel surfaces, which were then immersed in 20 mL of the beverages for 30 min at 37 ℃. The degree of erosion was evaluated using ATR-FTIR spectroscopy and Vickers＇ microhardness measurements. The spectra obtained were interpreted in two ways that focused on the ~1, ~3 phosphate contour： the ratio of the height amplitude of ~3 P04 to that of/11 P04 （Method 1） and the shift of the v3 P04 peak to a higher wavenumber （Method 2）. The percentage changes in microhardness after the erosion treatments were primarily affected by the pH of the immersion media. Regression analyses revealed highly significant correlations between the surface hardness change and the degree of erosion, as detected by ATR-FTIR spectroscopy （P〈0.001）. Method 1 was the most sensitive to these changes, followed by surface hardness change measurements and Method 2. This study suggests that ATR- FTIR spectroscopy is potentially advantageous over the microhardness test as a simple, non-destructive, sensitive technique for the quantification of enamel erosion.

关键词： acidic beverage enamel erosion Fourier transform infrared spectroscopy microhardness sensitivity

DVL/RPM Based Velocity Filter Aiding in the Underwater Vehicle Integrated Inertial Navigation System

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Journal of Sensor Technology 2014年第3期4卷 154-164页

作者： tae suk Yoo Maritime R&D Center LIG Nex1 Co. Ltd. Gyeonggi-Do South Korea

The purpose of this paper is to design a DVL-RPM based VKF (Velocity Kalman Filter) design for a performance improvement underwater integrated navigation system. The integrated navigation sensor using DVL (Doppler Velocity Log) is widely used to improve the underwater navigation performance. However, the DVL’s range of measuring varied depending on the characteristics of sensor. So, if the sea gets too deep suddenly, it cannot measure the velocity. To complement such a weak point, the VKF was additionally designed, which was made of DVL, RPM (Revolve Per Minutes) of motor, and ES (Echo Sounder). The proposed approach relies on a VKF, augmented by an altitude from ES based switching architecture to yield robust performance, even when DVL exceeds the measurement range and the measured value is unable to be valid. The proposed approach relies on two parts: 1) indirect feedback navigation Kalman filter design, 2) VKF design. To evaluate the proposed method, we compare the VKF aided navigation system with PINS (Pure Inertial Navigation System) and conventional INS-DVL navigation system through simulation results. Simulations illustrate the effectiveness of the underwater navigation system assisted by the additional DVL-RPM based VKF in underwater environment.

关键词： IMU (Inertial Measurement Unit) Kalman Filter VKF (Velocity Kalman Filter)

Limited endoscopic sphincterotomy plus large balloon dilation for choledocholithiasis with periampullary diverticula

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World Journal of Gastroenterology 2010年第34期16卷 4335-4340页

作者： Hyung Wook kim Dae Hwan Kang Cheol Woong Choi Jong Hwan Park Jin Ho Lee Min Dae kim Il Doo kim ki tae Yoon Mong Cho Ung Bae Jeon suk kim Chang Won kim Jun Woo Lee Department of Internal Medicine Pusan National University School of Medicine and Medical Research Institute Pusan National University Yangsan Hospital Department of Radiology Pusan National University School of Medicine and Medical Research Institute Pusan National University Hospital

AIM: To investigate the effectiveness and safety of limited endoscopic sphincterotomy (EST) plus large balloon dilation (LBD) for removing choledocholithiasis in patients with periampullary diverticula (PAD). METHODS: A total of 139 patients with common bile duct (CBD) stones were treated with LBD (10-20 mm balloon diameter) after limited EST. Of this total, 73 patients had PAD and 66 patients did not have PAD (controls). The results of stone removal and complications were retrospectively evaluated. RESULTS: There were no significant differences between the PAD and the control groups in overall successful stone removal (94.5% vs 93.9%), stone removal in first session (69.9% vs 81.8%), mechanical lithotripsy (12.3% vs 13.6%), and complications (11.0% vs 7.6%). Clinical outcomes were also similar between the types of PAD, but the rate of stone removal in first session and the number of sessions were significantly lower and more frequent, respectively, in type B PAD (papilla located near the diverticulum) than controls [23/38 (60.5%) vs 54/66 (81.8%), P = 0.021; and 1 (1-2) vs 1 (1-3), P = 0.037, respectively] and the frequency of pancreatitis was significantly higher in type A PAD (papilla located inside or in the margin of the diverticulum) than in controls (16.1% vs 3.0%, P = 0.047). CONCLUSION: Limited EST plus LBD was an effective and safe procedure for removing choledocholithiasis in patients with PAD. However, some types of PAD should be managed with caution.

关键词： Endoscopic sphincterotomy Large balloon dilation Choledocholithiasis Periampullary diverticula