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Yong Zhou,C. F. Li 한국전산응용수학회 2005 Journal of applied mathematics & informatics Vol.18 No.1-2
In this paper, we consider the higher order nonlinear neutral delay difference equation of the form r(xn + pxn−) + f(n, xn−1(n), xn−2(n), . . . ,xn−m(n)) = 0. We give an integrated classification of nonoscillatory solutions of the above equation according to their asymptotic behaviours. Necessary and suffi- cient conditions for the existence of nonoscillatory solutions with designated asymptotic properties are also established.
Experimental Study of Molecular Immune Mechanism of TGCO Anti-Adjurant Arthritis
Zhou, Yong,Li, Jianmin,Wang, Xudan 경희대학교 2001 INTERNATIONAL SYMPOSIUM ON EAST-WEST MEDICINE Vol.2001 No.1
The total glycosides of cornus officinal (TGCO) is effective part of cornus officinals, TGCO suppress immune reactions has been reported in vivo or in vitro. In this paper, we researched effect of TGCO on rat adjuvant arthritis and its molecular immune mechanism. The results showed that TGCO had better action of curing to rat AA, suppressing joint swell of primary and secondary recreation to adjuvant, improving of pathological changes of joints and alleviating spain. On above basis, we forward investigated the molecular immune mechanism TGCO anti-AA, the main results showed such as: 1. TGCO could suppress T lymphocytes proliferation stimulated with ConA and DTH reaction induced by PPO in AA rats. 2. TGCO suppress production of IL-1, IL-6 and TNFα of peritoneal macrophages from AA rats, and PEG2 in plasma of AA rats.3. TGCO could suppress expression of iNOS mRNA gene and IL-lra mRNA gone of peritoneal macrophage of AA rats. 4. Cell-ELISA method was used to detect adhesion molecules(ICAM-1, CD44) and integrin (α4 β7) on ECV 304(It is an important endothelial cell line derived from HUVEC), TGCO could inhibit ECV304 expressing adhesion molecules (ICAM-1, CD44) and integrin(α4β7), with TNF-α and IL-1 stimulate in vitro. Summarizing above results, we infer that TGCO can cure rat AA is in relation to suppressing cell-mediated immune, anti inflammation cytokine(IL-1. IL-6 and TNF-α), and inhibiting adhesion molecule expression.
Zhou Yong,Dong Qi,Niu Xiao-Jun,Xu Hong,Xiong Qi,Su Hao,Zheng Jun 대한전기학회 2021 Journal of Electrical Engineering & Technology Vol.16 No.6
A 2 MW direct-drive (DD) high temperature superconducting (HTS) wind power generator with HTS wires in the rotor fi eld windings and copper transposed conductor in the stator coils was explored for the wind turbine application in this study. An oil-cooling air-core stator with non-magnetic teeth of the 2 MW DD HTS generator was designed because the high fl ux density generated by the HTS wires wound result in larger dissipation in iron teeth, and the process of that could be summarized as follows. First, a 2 MW DD HTS wind power generator was designed, and the electromagnetic (EM), loss, EM force, and insulation of the DD HTS generator were analyzed and developed, respectively. Second, the thermal and mechanical of the one pole pair oil-cooling air-gap armature was analyzed by the fi nite element analysis. Then, a pole pair segment of the oil-cooling air-core stator with the same structure as the 2 MW generator was designed and manufactured to identify potential challenges, obtain practical knowledge before production, and then reduce the development risk of the 2 MW DD HTS generator. Furthermore, a test system with converter, oil-cooling system, and data acquisition equipment was developed simultaneously to test the temperature distribution of the slotless stator. The performance test results show that the maximum temperature rise of the one pole pair oil-cooling stator under rated conditions is about 81.4 K, which satisfi es the design requirements of the 2 MW DD HTS generator.
Yong Yan,Fan Jiang,Lian Liu,Zhou Yu,Yong Zhang,Yong Zhao 대한금속·재료학회 2016 ELECTRONIC MATERIALS LETTERS Vol.12 No.1
A growth method is presented to control the preferred orientation inchalcopyrite CuInxGa1-xSe2 (CIGS) thin films grown by magnetronsputtering. Films with (220/204) and (112) preferred orientation aswell as randomly oriented films were prepared. The effects of anIn2Se3 wetting layer and the working pressure on the texture transitionphenomena were examined. A large-grained CIGS film with (220/204) texture was formed at 400°C with the inclusion of a thin (80 nm)In2Se3 layer and liquid phase (excess copper selenide phase)formation, and the reaction mechanism is proposed. The devicedeposited at 2.0 Pa on an In2Se3 layer exhibited the optimal electricalproperties.
IN SITU UNZIPPING OF CARBON NANOTUBES TO FORM GRAPHENE NANORIBBONS
YONG-SHENG ZHOU,PAN JIN,TENG GUO,YING-CHUN ZHU,GAO-HUI DU,BING-SHE XU 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.1
We report the one step facile synthesis of graphene nanoribbons (GNRs) by unzipping carbonnanotubes (CNTs) from glucose (C 6 H 12 O 6 ) precursor, using a simple chemical vapor depositionmethod. Some nanotubes are partially cut resulting in a GNR – CNT hybrid whereas others arefully cut to form GNRs. The average length of GNRs achieved by this method is typically in therange of 1 – 10 ? m. The formation of GNRs is ascribed to the in situ oxygen-driven unzipping ofCNTs. The process is free from aggressive oxidants and utilizes the in situ unzipping. Thismethod o®ers an alternative approach for making GNRs, compared to previously used techniquesto synthesize GNRs.
Optimization of preparation and properties of Gardenia yellow pigment-loaded alginate beads
Yong Liu,Qing Zhou,Yan-Mei He,Xiu-Yun Ma,Lin-Na Liu,Yong-Jian Ke 한국화학공학회 2021 Korean Journal of Chemical Engineering Vol.38 No.8
Gardenia yellow pigment (GYP) loaded alginate beads were prepared by the ionic gelation technique, and the preparation parameters were optimized by response surface methodology for high encapsulation efficiency. The optimized parameters were alginate concentration of 3.3%, CaCl2 concentration of 2.4%, and GYP concentration of 3.2mg/mL, under which the encapsulation efficiency was 73.61%. The surface morphology and bead size analysis showed that the GYP-loaded alginate beads had a roughly spherical morphology with a wrinkled surface, and their average diameter was 0.87 mm. In vitro release test revealed that the GYP release had a pH-dependent release profile and a two-step release process. The Rigter-Peppas model was the most proper model to assess the GYP release from alginate beads. The release mechanism of GYP at pH 1.2 and 7.4 was non-Fickian transport and case-II transport, respectively. The 2,2-diphenyl-1-picrylhydrazyl assay indicated that the encapsulated GYP had effectively maintained 82.56% of the antioxidant activity.
Yong Zhou,Feng Xie,Hai-Yuan Jia,Wei Chen 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.10
A conceptual 20 MW high-temperature superconducting (HTS) motor (HTSM) with a novel glass-fiber reinforced plastic (GFRP) racetrack ring in the flexible support rotor was explored in this study. To support the cold mass at operating conditions, the high-strength, lowleakage GFRP racetrack ring was designed as follows. First, conceptual design of the 20 MW HTSM was conducted, and the torque transmitted by the GFRP racetrack rings was obtained through electromagnetic analysis. Second, a GFRP racetrack ring was designed, and its total cross-sectional area was obtained through theoretical analysis. Third, thermal leakage and stress were calculated and examined through theoretical and finite element analyses, respectively. The GFRP racetrack ring with the “D” ring was selected based on the results. The thickness and width of the GFRP ring were set to 16 and 10 mm, respectively, and the thickness of the “D” ring was 3 mm. Then, a full-scaled GFRP ring was fabricated, and its strength and stiffness were tested via room-temperature and low-temperature tensile tests. The average tensile strength and average Young’s modulus of the GFRP ring at room temperature were 1131.5 MPa and 49.9 GPa, respectively. The strength of the GFRP ring at 193.4 K was 1243.9 MPa, and the Young's modulus of the GFRP ring at 141.3 K was 69 GPa. Lastly, a new 200 kW HTS generator was assembled using a scaled rotor with the same structure as the 20 MW HTSM and the original stator of an existing 200 kW generator. The test system was built to evaluate the feasibility of the GFRP ring before manufacturing the 20 MW HTSM. Test results showed that the GFRP ring is feasible, the design method of the GFRP ring is credible. The GFRP ring is suitable for the cold mass support of HTSMs and other low-temperature devices.
Insect-specific microRNA involved in the development of the silkworm Bombyx mori
Yong Zhang,Xue Zhou,Xie Ge,Jiang-Hao Jiang,Mu-Wang Li,Shi-Hai Jia,Xiao-Nan Yang,Yun-Chao Kan,Xue-Xia Miao,Guo-Ping Zhao,Fei Li,Yong-Ping Huang 한국응용곤충학회 2009 한국응용곤충학회 학술대회논문집 Vol.2009 No.10
MicroRNAs (miRNAs) are endogenous non-coding genes that participate in post-transcription regulation by either degrading mRNA or blocking its translation. It is considered to be very important in regulating insect development and metamorphosis. Insects are the largest group of animals and are extremely valuable in biological and agriculture research. Insects are also important pests to human health and agriculture, and efforts are necessary protect both humans and plants from disease and damage. Despite their importance, insects lag behind mammals, nematodes, and plants in miRNA research. At present, only 279 insect miRNAs have been identified from Drosophila melanogaster, Anopheles gambiae, Apis mellifera, Bombyx mori, and D. pseudoobscura in miRBase, and most of these miRNAs were computationally predicted without experimental validation. Functional analysis of insect miRNAs has only been conducted in D. melanogaster.