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Disordered Structure and Reversible Phase Transformation from K-Birnessite to Zn-Buserite Enable High-Performance Aqueous Zinc-lon Batteries

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Energy & Environmental Materials 2024年第3期7卷 100-111页

作者： Nibagani Naresh Suyoon Eom Sang Jun lee Su Hwan Jeong Ji-Won Jung Young Hwa Jung Joo-hyung Kim Department of Materials Engineering and Convergence Technology Gyeongsang National University(GNU)Jinju 52828South Korea School of Material Science and Engineering(Ceramic Engineering) Gyeongsang National University(GNU)Jinju 52828South Korea School of Materials Science and Engineering University of Ulsan(UOU)Ulsan 44776South Korea PLS-ⅡBeamline Division Pohang Accelerator Laboratory(PAL)Pohang 37673South Korea

The layeredδ-MnO_(2)(dMO)is an excellent cathode material for rechargeable aqueous zinc-ion batteries owing to its large interlayer distance(~0.7 nm),high capacity,and low cost;however,such cathodes suffer from structural degradation during the long-term cycling process,leading to capacity *** this study,a Co-doped dMO composite with reduced graphene oxide(GC-dMO)is developed using a simple cost-effective hydrothermal *** degree of disorderness increases owing to the hetero-atom doping and graphene oxide *** is demonstrated that layered dMO and GC-dMO undergo a structural transition from K-birnessite to the Zn-buserite phase upon the first discharge,which enhances the intercalation of Zn^(2+)ions,H_(2)O molecules in the layered *** GC-dMO cathode exhibits an excellent capacity of 302 mAh g^(-1)at a current density of 100 mAg^(-1)after 100 cycles as compared with the dMO cathode(159 mAhg^(-1)).The excellent electrochemical performance of the GC-dMO cathode owing to Co-doping and graphene oxide sheets enhances the interlayer gap and disorderness,and maintains structural stability,which facilitates the easy reverse intercalation and de-intercalation of Zn^(2+)ions and H_(2)O ***,GC-dMO is a promising cathode material for large-scale aqueous ZIBs.

关键词： aqueous zinc-ion batteries birnessite buserite disordered structure phase transformation

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A hybrid swarm population of Pinus densiflora × P. sylvestris inferred from sequence analysis of chloroplast DNA and morphological characters

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Journal of Forestry Research 2013年第1期24卷 53-60页

作者： Young Hee Joung Jerry L. Hill Jung Oh Hyun Ding Mu Juchun Luo Do hyung lee Takayuki Kawahara Jeung Keun Suh Mark S. Roh Chonnam National University School of Biological Sciences & TechnologyGwangjuKorea US Department of Agriculture Forest ServiceDorena Genetic Resource CenterWashington State UniversityPullmanWA99164USA Seoul National University College of Agriculture and Life SciencesSeoulKorea Chinese Academy of Agricultural Science Beijing Forestry University College of Resources and Environment Yeungnam University College of Natural ResourcesDepartment of Forest ResourcesGyeongsanKorea Hokkaido Research Center Forestry and Forest Products Research InstituteSapporoJapan. Dankook University School of Bio-Resource ScienceDepartment of Environment HorticultureCheonanKorea. US Department of Agriculture Agricultural Research ServiceUS National ArboretumFloral and Nursery Plants Research UnitBeltsvilleMD 20705USA.

To confirm a hybrid swarm population of Pinus densiflora × P. sylvestris in Jilin, China, we used needles and seeds from P. densiflora, P. sylvestris, and P. densiflora × P. sylvestris collected from natural stands or experimental stations to study whether shoot apex morphology of 4-year old seedlings can be correlated with the sequence of a chloroplast DNA simple sequence repeat marker （cpDNA SSRs）. Total genomic DNA was extracted and subjected to sequence analysis of the pine cpDNA SSR marker Pt15169. Results show that morphological characters from 4-year old seedlings did not correlate with sequence variants of this marker. Marker haplotypes from all P. sylvestris trees had a CTAT element that was absent from all sampled P. densiflora trees. However, both haplotype classes involving this insertion/deletion element were found in a P. densiflora × P. sylvestris population and its seedling progeny. It was concluded that the P. densiflora × P. sylvestris accessions sampled from Jilin, China resulted from bi-directional crosses, as evidenced by both species’ cpDNA haplotypes within the hybrid swarm population.

关键词： P. sylvestris var. sylvestriformis chloroplast DNA simplesequence repeat sequencing hybrid swarm population

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Comparison of a novel bedside portable endoscopy device with nasogastric aspiration for identifying upper gastrointestinal bleeding

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World Journal of Gastroenterology 2014年第25期20卷 8221-8228页

作者： Jong Hwan Choi Jae Hyuk Choi Yoo Jin lee hyung Ki lee Wang Yong Choi Eun Soo Kim Kyung Sik Park Kwang Bum Cho Byoung Kuk Jang Woo Jin Chung Jae Seok Hwang Division of Gastroenterology and Hepatology Department of Internal Medicine Keimyung University School of MedicineDaegu 700-712South Korea

AIM: To compare outcomes using the novel portable endoscopy with that of nasogastric (NG) aspiration in patients with gastrointestinal bleeding.

关键词： Endoscopy Gastrointestinal bleeding Nasogastric aspiration

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Association between Helicobacter pylori status and metachronous gastric cancer after endoscopic resection

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World Journal of Gastroenterology 2016年第44期22卷 9794-9802页

作者： Sung Bum Kim Si hyung lee Seung Il Bae Yo Han Jeong Se Hoon Sohn Kyeong Ok Kim Byung Ik Jang Tae Nyeun Kim Department of Internal Medicine Yeungnam University College of Medicine

AIM To investigate the effect of Helicobacter pylori(H. pylori) status test and H. pylori eradication on the occurrence of metachronous gastric cancer(MGC) after endoscopic submucosal dissection(ESD) of early gastric cancer(EGC) and risk factors of MGC. METHODS The authors retrospectively reviewed the medical records of 433 patients(441 lesions) who underwent ESD for EGC from January 2005 to January 2015 in Yeungnam University Hospital. Patients were categorized into two groups; the H. pylori tested group(n = 257) and the H. pylori non-tested group(n = 176) based on performance of H. pylori status test after ESD of EGC. The H. pylori tested group was further categorized into three subgroups based on H. pylori status; the H. pylori-eradicated subgroup(n = 120), the H. pylori-persistent subgroup(n = 42), and the H. pylori-negative subgroup(n = 95). Incidences of MGC and risk factors of MGC were *** Median follow-up duration after ESD was 30.00 mo(range, 6-107 mo). Total 15 patients developed MGC during follow-up. MGC developed in 11 patients of the H. pylori tested group(7 in the H. pylori-negative subgroup, 3 in the H. pylori-eradicated subgroup, and 1 in the H. pylori-persistent subgroup) and 4 patients of the H. pylori non-tested group(P > 0.05). The risk factors of MGC were endoscopic mucosal atrophy in the H. pylori tested group and intestinal metaplasia in all patients. CONCLUSION H. pylori eradication and H. pylori status test seems to have no preventive effect on the development of MGC after ESD for EGC. The risk factors of MGC development were endoscopic mucosal atrophy in the H. pylori tested group alone and intestinal metaplasia in all patients.

关键词： Metachronous gastric cancer Endoscopic submucosal dissection Helicobacter pylori

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Comparative standardized ileal amino acid digestibility and metabolizable energy contents of main feed ingredients for growing pigs when adding dietary β-mannanase

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Animal Nutrition 2019年第4期5卷 359-365页

作者： Se Min Jeon Abdolreza Hosseindoust Yo Han Choi Min Ju Kim Kwang Yeol Kim Jun hyung lee Dong Yong Kil Beob Gyun Kim Byung Jo Chae Department of Animal Resources Science College of Animal Life SciencesKangwon National UniversityChuncheon 24341South Korea Swine Division National Institute of Animal ScienceRural Development AdministrationCheonan 31000South Korea Department of Animal Science and Technology Chung-Ang UniversityAnseong-siGyeonggi-do 17546South Korea Department of Animal Science and Technology Konkuk UniversitySeoul 143-701South Korea

The present study was conducted to test whether the dietary supplementation of β-mannanase affects amino acids(AA) digestibility,metabolizable energy(ME) contents of corn,wheat,soybean meal,distillers dried grains with solubles,and palm kernel meal(PKM),nutrient digestibility,and growth performance of *** Exp.1,22 cannulated pigs were used for 10 dietary treatments including 5 feed ingredients and 2 β-mannanase concentrations(0 and 0.5 g/kg of the diet) in 6 periods in an incomplete Latin square design to determine the AA and energy *** Exp.2,200 growing pigs were randomly allotted to 4 treatments with 2 nutrient levels(high and low) and 2 concentrations of β-mannanase(2×2 factorial arrangement) in 2 phases(phase 1,d 0 to 21;and phase 2,d 22 to 42).In Exp.1,β-mannanase increased the mean standardized ileal digestibility(SID) of AA in all feed *** amount of digestible energy was increased(P <0.05) in β-mannanase-treated *** fed β-mannanase showed a greater(P <0.05) digestibility of gross energy(GE).The feed-to-gain(F:G) ratio was improved(P <0.01) in pigs fed high-nutrient *** fed β-mannanase in the diets had greater(P <0.05) average daily gain and F:*** phase 2,the concentration of fecal ammonia was decreased(P <0.05) in pigs fed β-*** the 2 experiments,it can be concluded that β-mannanase increases the SID of AA,which has to be considered in balancing the rations.

关键词： Growing pigs β-mannanase Standardized ileal amino acids Ammonia Metabolizable energy

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Analytical Evaluation of the Asymptotic Impedance Matrix of a Uniaxial Substrate with Roof-Top Functions

Analytical Evaluation of the Asymptotic Impedance Matrix of ...

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2002 3rd International Symposium on Electromagnetic Compatibility

作者： Kai Li Seong-Ook Park hyung-Soo lee school of Engineering Information and Communications University 58-4 Hwaam-dongYusung-guTaejon305-732South KOREA Electronics Telecommunications Research Institute(ETRI) 161 Jajong-Dong Yusong-GuTaejon305-350South Korea

＜正＞An asymptotic technique is presented to solve the asymptotic part of the impedance matrix in the spectral domain for printed circuit structures on a uniaxial substrate by using roof-top subdomain *** infinite double integral of the asymptotic part of the impedance matrix is reduced to a finite one-dimensional integral by performing the integral transform technique. The efficiency and accuracy of the proposed method are compared with those of the conventional method,and it is demonstrated that the proposed method reduce the computation and improve the accuracy for the anisotropic uniaxial case.

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Interleukin-24 is correlated with differentiation and lymph node numbers in rectal cancer

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World Journal of Gastroenterology 2011年第9期17卷 1167-1173页

作者： Youngmin Choi Mee-Sook Roh Young-Seoub Hong hyung-Sik lee Won-Joo Hur Department of Radiation Oncology Dong-A University School of Medicine Department of Pathology Dong-A University School of Medicine Department of Preventive Medicine Dong-A University School of Medicine

AIM:To assess the significance of interleukin(IL)-24 and vascular endothelial growth factor(VEGF)expression in lymph-node-positive rectal cancer. METHODS:Between 1998 and 2005,90 rectal adenocarcinoma patients with lymph node involvement were *** patients received radical surgery and postoperative pelvic chemoradiotherapy of 50.4-54.0 *** of 5-fluorouracil and leucovorin or levamisole was given intravenously during the first and last week of radiotherapy,and then monthly for about 6 *** of IL-24 and VEGF was evaluated by immunohistochemical staining of surgical specimens, and their relations with patient characteristics and survival were *** median follow-up of surviving patients was 73 mo(range:52-122 mo). RESULTS:IL-24 expression was found in 81 out of 90 patients;31 showed weak intensity and 50 showedstrong *** expression was found in 64 out of 90 *** and weak intensities of IL-24 expression were classified as negative expression for ***-24 expression was significantly reduced in poorly differentiated tumors in comparison with well or moderately differentiated tumors(P=0.004),N2b to earlier N stages(P=0.016),and stageⅢc to stageⅢ a orⅢb(P=0.028).The number of involved lymph nodes was also significantly reduced in IL-24-positive patients in comparison with IL-24-negative ones. There was no correlation between VEGF expression and patient *** of IL-24 and VEGF was not correlated with survival,but N stage and stages were significantly correlated with survival. CONCLUSION:IL-24 expression was significantly correlated with histological differentiation,and inversely correlated with the degree of lymph node involvement in stageⅢrectal cancer.

关键词： Interleukin-24 Rectal cancer Lymph node Histological differentiation Vascular endothelial growth factor

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Double layered self-expanding metal stents for malignant esophageal obstruction, especially across the gastroesophageal junction

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World Journal of Gastroenterology 2012年第28期18卷 3732-3737页

作者： Min Dae Kim Su Bum Park Dae Hwan Kang Jae hyung lee Cheol Woong Choi hyung Wook Kim Chung Uk Chung Young Il Jeong Department of Internal Medicine Bongseng Memorial Hospital Busan 601-723 South Korea Department of Internal Medicine Pusan National University School of Medicine and Research Institute for Convergence of Biomedical Science and Technology Pusan National University Yangsan Hospital Yangsan 626-770 South Korea

AIM: To evaluate the clinical outcomes of double-layered self-expanding metal stents (SEMS) for treatment of malignant esophageal obstruction according to whether SEMS crosses the gastroesophageal junction (GEJ). METHODS: Forty eight patients who underwent the SEMS insertion for malignant esophageal obstruction were enrolled. Patients were classified as GEJ group (SEMS across GEJ, 18 patients) and non-GEJ group (SEMS above GEJ, 30 patients) according to SEMS position. Double layered (outer uncovered and inner covered stent) esophageal stents were placed. RESULTS: The SEMS insertion and the clinical improvement were achieved in all patients in both groups. Stent malfunction occurred in seven patients in the GEJ group and nine patients in the non-GEJ group. Tumor overgrowth occurred in five and eight patients, respectively, food impaction occurred in one patient in each group, and stent migration occurred in one and no patient, respectively. There were no significant differences between the two groups. Reflux esophagitis occurred more frequently in the GEJ group (eight vs five patients, P = 0.036) and was controlled by proton pump inhibitor. Aspiration pneumonia occurred in zero and five patients, respectively, and tracheoesophageal fistula occurred in zero and two patients, respectively. CONCLUSION: Double-layered SEMS are a feasible and effective treatment when placed across the GEJ for malignant esophageal obstruction. Double-layered SEMS provide acceptable complications, especially migration, although reflux esophagitis is more common in the GEJ group.

关键词： Metal stent Gastroesophageal junction Malignant esophageal obstruction

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Gastric subepithelial lesion complicated with abscess: Case report and literature review

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World Journal of Gastroenterology 2015年第20期21卷 6398-6403页

作者： Sung Bum Kim Myung Jin Oh Si hyung lee Department of Internal Medicine Yeungnam University College of Medicine

Gastric abscess is a localized pyogenic inflammation of the gastric wall, which is a rare form of suppurative gastritis. The rarity of gastric abscess may be associated with the difficulty of early diagnosis and high mortality as a result. In general, subepithelial lesions (SELs) of the stomach are incidentally detected during the course of upper endoscopy without specific clinical symptoms and signs. However, some gastric SELs present rarely as a form of hemorrhage, obstruction, perforation, and abscess. Here we report a 45-year-old man with gastric SEL presenting as a gastric abscess, which was diagnosed as an ectopic pancreas of the stomach, along with a review of the literature. Although gastric SEL presenting as an abscess is known as a serious and life-threatening lesion, the patient made a complete recovery through surgical resection as well as medical treatment.

关键词： Suppurative gastritis Gastric abscess Subepithelial lesion Ectopic pancreas Endoscopicultrasound

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Esophageal subepithelial lesion diagnosed as malignant gastrointestinal neuroectodermal tumor

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World Journal of Gastroenterology 2015年第18期21卷 5739-5743页

作者： Sung Bum Kim Si hyung lee Mi Jin Gu Department of Internal Medicine Yeungnam University Hospital Department of Pathology Yeungnam University Hospital

A 21-year-old male visited our hospital with a complaint of aggravating dysphagia and odynophagia for a few *** showed huge bulging mucosa with an intact surface causing luminal narrowing at 35 cm from the incisor *** ultrasonography showed an about 35 mm sized irregular margined in-homogenous hypoechoic lesion with an obscure layer of *** ultrasonography fine needle aspiration revealed spindle cell proliferation without immunoreactivity for CD117,SMA,and *** patient underwent excision of the subepithelial lesion at the distal *** pathologic examination of the specimen,the tumor was composed of short fascicles of oval to spindle cells with eosinophilic and clear cytoplasm and vesicular *** tumor cells were positive for S-100 and SOX10and negative for CD117,SMA,HMB-45,melan-A,cytokeratin,and *** split-apart signal was detected in EWSR1 on FISH,suggesting a malignant gastrointestinal neuroectodermal *** the time of writing,the patient is on radiation therapy at the operated site of esophagus and doing well,with no recurrence for three *** gastrointestinal neuroectodermal tumor is a rare gastrointestinal tumor with features of clear cell sarcoma,without melanocytic differentiation,and shows a poor *** is the first reported case of malignant gastrointestinal neuroectodermal tumor arising as subepithelial lesion in the esophagus.

关键词： Subepithelial lesion Esophagus Malignant gastrointestinal neuroectodermal tumor Ewing sarcoma break point region 1 gene Fluorescence in situ hybridization

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