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UV-Catalytic Treatment of Municipal Solid-Waste Landfill Leachate with Hydrogen Peroxide and Ozone Oxidation

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Chinese Journal of Chemical Engineering 2002年第4期10卷 444-449页

作者： TahirImranQURESHI Hong－TaeKIM 等 DepartmentofEnvironmentalEngineering DepartmentofCivilEngineering KyungpookNationalUniversityTaegu702－701Korea

The performance of UV/H_2O_2, UV/O_3, and UV/H_2O_2/O_3 oxidationsystems for the treatment of municipal solid-waste landfill leachatewas investigated. Main objective of the experiment was to removetotal organic carbon (TOC), non-biodegradable organic compounds(NBDOC) and color. In UV/H_2O_2 oxidation experiment, with theincrease of H_2O_2 dosage, removal efficiencies of TOC and coloralong with the ratio of biochemical oxygen demand (BOD) to chemicaloxygen demand (COD) of the effluent were increased and a betterperformance was obtained than the system H_2O_2 alone.

关键词： photochemical degradation UV/ozone UV/hydrogen peroxide advancedoxidation process

Fracture and Tribological Evaluation of Dental Composite Resins Containing Pre-polymerized Particle Fillers

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Journal of Materials Science & Technology 2003年第3期19卷 249-252页

作者： JingriREN KyohanKim SeockSamKim DepartmentofMechanicalEngineering YanbianUniversityYanji133002China DepartmentofDentalBiomaterials KyungpookNationalUniversityTaegu701-702Korea DepartmentofMechanicalEngineering KyungpookNationalUniversityTaegu701-702Korea

The fracture and tribological evaluation of dental composite resin containing pre-polymerized particle fillers were investigated. Composite resins, e.g. metafil, silux plus, heliomolar and palfique estelite were selected as specimens in order to evaluate the effects of pre-polymerized particle filler on the fracture and wear characteristics of composite resins. In the wear tests, a ball-on-flat wear test method was used. The friction coefficient of metafil was quite high. The wear resistance of silux plus and palfique estelite was better than that of metafil and heliomolar under the same experimental condition. The main wear mechanism of composite resins containing pre-polymerized particle fillers was an abrasive wear by brittle fracture of pre-polymerized particles and by debonding of fillers and matrix.

关键词： Composite resin Tribology Dental materials Pre-polymerization Wear mechanism

Electromagnetic Scattering from One-Dimensional Time-Varying Sea Surface with Gaussian-Like Beam Incidence

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Communications in Theoretical Physics 2004年第3X期42卷 413-418页

作者： GUOLi-Xin WUChun-Yu KimCheyoung WUZhen-Sen SchoolofScience XidianUniversityXi'an710071China SchoolofElectricalEngineeringandComputerScience KyungpookNationalUniversityTaeguKorea

A widely used iterative technique named the Method of Ordered Multiple Interactions is given for calculat-ing the Gaussian-like beam scattering from a time-varying sea surface with the Pierson-Moskowitz (P-M) spectrum. Thisis done by solving the magnetic field integral equation for the current induced on an infinite rough surface. Following thediscretization of the integral equation, the unknown currents can be determined more rapidly with the LU *** results are presented with emphasis on the electromagnetic backscattering at low grazing angle incidence. Itis shown that the backscattering cross section is proportional to the nearly fourth power of the grazing angle for thebackscattering cross section with a different beam waist, surface length, and velocity of the wind are

关键词：电磁散射类高斯束时间改变水平面蒙特卡罗模型背景散射截面平面波

Synthesis and light-emitting properties of organic electroluminescent compounds and their metal complexes

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Chinese Science Bulletin 2004年第8期49卷 797-802页

作者： CUIJianzhong KimSung-Hoon DepartmentofChemistry TianjinUniversityTianjin300072China DepartmentofDyeingandFinishing KyungpookNationalUniversityDaegu702-701Korea

Several organic electroluminescent (EL) com-pounds,2,2′-(1,4-phenylenedivinylene)bis-3,3-dimethyl-in- dolenine (1),2,2′-(1,4-phenylenedivinylene)bis-benzoxazole (2), 2,2′-(1,4-phenylenedivinylene)bis-benzothiazole (3), 4,4′-(1,4-phenylenedivinylene)bis-quinoline (4),2,2′-(1,4-phenyle-nedivinylene)bis-quinoline (5),2,2′-(1,4-phenylenedivinyle-ne)bis-1,3,3-trimethyl-indoleninedichloride(6),2,2′-(1,4- phenylene-divinylene)bis-1-hydro-3,3-dimethylindolenine dichloride (7),2,2′-(1,4-phenylenedivinylene)bis-8-acetoxy- quinoline (8), 2,2′-(1,4-phenylenedivinylene)bis-8-hydroxyq- uinoline (9) and metal complexes of 9, Al(PHQ) (10) and Zn(PHQ) (11), have been synthesized and characterized. The crystal structure of 6 was determined. Light emitting proper-ties of the prepared compounds have been investigated. 1 produces an orange-yellow emission (lmax = 575 nm). The cation, 6, gives a red emission (lmax = 607 nm), which is shifted 32 nm to the red compared to 1. 8 produces a yellow emission (lmax = 567 nm). The metal complex 10 gives a red emission (lmax = 610 nm), which is a red shift of 43 nm com-pared to 8. The change in structure in the prepared com-pound caused a change in the electron distribution in the compounds, which induces a large wavelength shift of the emitted-light. Thermal analysis showed that the decomposi-tion temperatures of the metal complexes (10, 11) were higher than those for the smaller organic molecular com-pounds (1-9). Therefore, metal complexes (10, 11) can be used as EL materials over a larger temperature range.

关键词：轻发射复合物晶体结构有机场致发光化合物波长转移金属复合物

Alterations of mast cells and TGF-β1 on the silymarin treatment for CCl_4-induced hepatic fibrosis

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World Journal of Gastroenterology 2005年第8期11卷 1141-1148页

作者： Da-HeeJeong Gi-PpeumLee Won-IlJeong Sun-HeeDo Hai-JieYang Dong-WeiYuan Ho-YongPark Kyu-JongKim Kyu-ShikJeong DepartmentofPathology CollegeofVeterinaryMedicineKyungpookNationalUniversityDaegu702-701RepublicofKorea KoreaResearchInstituteofBioscienceandBiotechnology DaejonRepublicofKorea Dr.KimMedicosClinics JungGuSamdeokDong3-21Daegu702-701RepublicofKorea

AIM: Silymarin is a potent antioxidant, antiinflammatory and anti-fibrogenic agent in the liver, which is mediated by alteration of hepatic Kupffer cell function, lipid peroxidation, and collagen production. Especially, in hepatic fibrogenesis, mast cells are expressed in chronic inflammatory conditions, and promote fibroblast growth and stimulate production of the extracellular matrix by hepatic stellate cells. METHODS: We examined the inhibitory mechanism of silymarin on CCI4-induced hepatic cirrhosis in rats. At 4, 8, and 12 wk, liver tissues were examined histopathologically for fibrotic changes produced by silymarin treatment. RESULTS: In the silymarin with CCU-treated group, increase of hepatic stellate cells and TGF-β1 production were lower than in the CCI4-treated group at early stages. Additionally, at the late fibrogenic stage, expressions of TGF-β1 were weaker and especially not expressed in hepatocytes located in peripheral areas. Moreover, the number of mast cell in portal areas gradually increased and was dependent on the fibrogenic stage, but those of CCI4+silymarin-treated group decreased significantly. CONCLUSION: Anti-fibrotic and antiinflammatory effects of silymarin were associated with activation of hepatic stellate cells through the expression of TGF-β1 and stabilization of mast cells. These results suggest that silymarin prevent hepatic fibrosis through suppression of inflammation and hypoxia in the hepatic fibrogenesis.

关键词： Silymarin TGF-β1 Mast cell Hepatic fibrosis

SIMULA在Cu/ZnO/Al_2O_3催化剂上进行甲醇部分氧化蒸气重整制备氢气的模拟研究(英文)

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燃料化学学报 2001年第3期29卷 207-213页

作者：蒋元力黄强王福安 Mee Sook Lim Dong Hyun Kim 郑州工业大学化工学院 DepartmentofChemicalEngineering KyungpookNationalUniversityTaegu702701Korea

两个大气压下 ,对管状填充床反应器中在Cu ZnO Al2 O3催化剂上甲醇部分氧化蒸气重整制备氢气进行了实验研究。在Cu ZnO Al2 O3催化剂上进行该反应体系动力学研究的基础上 ,建立了该反应器内的稳态质量和热量衡算方程 ,同时考虑了颗粒内... 详细信息

两个大气压下 ,对管状填充床反应器中在Cu ZnO Al2 O3催化剂上甲醇部分氧化蒸气重整制备氢气进行了实验研究。在Cu ZnO Al2 O3催化剂上进行该反应体系动力学研究的基础上 ,建立了该反应器内的稳态质量和热量衡算方程 ,同时考虑了颗粒内的扩散限制。模型的预测结果与实验结果吻合较好。

关键词：氢气制备模拟质量衡算热量衡算部分氧化蒸气重整甲醇铜氧化锌氧化铝催化剂

Security extension for the Canetti-Krawczyk model in identity-based systems

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Science in China(Series F) 2005年第1期48卷 117-124页

作者： LIXinghua MAJianfeng SangJaeMoon KeyLaboratoryofComputerNetworksandInformationSecurity(MinistryofEducation) XidianUniversityXi'an710071China//SchoolofComputingandAutomatizationTianjinPolytechnicUniversityTianjin300160China MobileNetworkSecurityTechnologyResearchCenter KyungpookNationalUniversitySankyuk-dongBuk-kuDaeyu702-701Korea KeyLaboratoryofComputerNetworksandInformationSecurity(MinistryofEducation) XidianUniversityXi'an710071China

The Canetti-Krawczyk (CK) model is a formalism for the analysis of key-exchange protocols, which can guarantee many security properties for the protocols proved secure by this model. But we find this model lacks the ability to guarantee key generation center (KGC) forward secrecy, which is an important security property for key-agreement protocols based on Identity. The essential reason leading to this weakness is that it does not fully consider the attacker's capabilities. In this paper, the CK model is accordingly extended with a new additional attacker's capability of the KGC corruption in Identity-based systems, which enables it to support KGC forward secrecy.

关键词： KGC forward secrecy Canetti-Krawczyk model attacker's capability key exchange protocol.

A New Bioassay Method for Evaluation Allelopathic Potential of Rice Germplasm

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Journal of Life Sciences 2016年第3期10卷 128-133页

作者： Yongliang Lu Hong Lu Kilung Kim Yiding Sun Jian Fu Yiqing Guo ChinaNationalRiceResearchInstitute ChineseAcademyofAgriculturalSciencesHangzhou310006China NationalCenterforAgro-Biodiversity/YunnanAgriculturalUniversity Kunming650201China CollegeofAgricultureandLifeScience KyungpookNationalUniversityDaegu702-701Korea Biotchnology&GermplasmResourceInstitute YunnanAcademyofAgriculturalSciencesKunming650223China

Allelopathy was defined in 1996 by IAS （international allelopathy society） as any process involving secondary metabolites produced by plant, algae, bacteria and fungi that influences the growth and development of agricultural and biological systems. Rice allelopathy against weeds was reported since 1989, which offers an integrated weed management with substantially reduced herbicide usage. Application of allelopathic rice cultivars is thought a resources conservation and environmental friendly way of weed bio-control, and could promote the sustainable development of agriculture. Screening or evaluating the allelopathic potential rice variety is the first step. In this paper, a new bioassay method was set up by the allelopathic potential of 9 rice lines on the target weed barnyardgrass （Echinochloa crusgalli）, and comparing with bioassay methods such as relay seeding in filter paper （RSF） and relay seeding in agar （RSA）. The results indicated that three methods had a same tendency in evaluating the allelopathic potential of rice; there existed a significant difference among different bioassay methods, and an interaction between bioassay methods and rice lines. The method of root exudates （RE） with the highest value and a correlation efficiency of 0.98 was considered as ideal bioassay method for evaluation of allelopathic potential.

关键词： Rice allelopathic potential bioassay methods comparison.

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反应型聚氨酯对不饱和聚酯树脂韧性的影响

网络聚合物材料通讯 2004年第1期3卷 6-9页

作者： KYUNG-EUNMIN YEONG-CEUNHWANG GWAN-YOUNGCHOI HO-GYUMKIM WOO-SIKKIM DONG-HOLEE LEE-SOONPARK KWAN-HOSEO INN-KYUKANG IL-RYUNJUN JEONG-CHEOLLIM HAN-CHULSONG 陈维涛天津科技大学，天津300220 DepartmentofPolymerScience KyungpookNationalUniversityTaeguSouthKorea DepartmentofIndustrialChemistry Kyung-ilUniversityKyungsanSouthKorea YeungnamCollageofScience＆TechnologyTaegu SouthKorea DepartmentofDyeing＆Finishing KyungpookNationalUniversityTaeguSouthKorea

不饱和聚酯(UP)树脂是一种重要的热固性树脂。在成型加工过程中，不饱和聚酯树脂常作为复合材料的一种基体树脂来使用。然而，不饱和聚酯树脂也存在一些缺陷：如耐碱性差；在低聚物不饱和聚酯树脂与苯乙烯单体进行交联反应的过程中发生... 详细信息

不饱和聚酯(UP)树脂是一种重要的热固性树脂。在成型加工过程中，不饱和聚酯树脂常作为复合材料的一种基体树脂来使用。然而，不饱和聚酯树脂也存在一些缺陷：如耐碱性差；在低聚物不饱和聚酯树脂与苯乙烯单体进行交联反应的过程中发生体积收缩、性脆。不饱和聚酯树脂的机械性能可以通过将其与不同的材料进行嵌段来得以提高。在研究中，使用聚氨酯(PU)作为改性剂来提高UP树脂的韧性，并讨论了作为PU软段的聚醚多元醇分子质量及PU含量对PU改性UP树脂韧性的影响。通过甲基二异氰酸酯(MDI)上的异氰酸酯基和UP分子上的羟基反应生成了一种UP／PU聚合物网络，发现当PU质量分数大约为2％时，其韧性达到最大值。以上结果可以通过弹性PU链段嵌入脆性UP树脂这一现象来加以解释。

关键词：不饱和聚酯聚氨酯聚合物网络韧性热固性树脂