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Travelling Wave Solutions in Delayed Reaction Diffusion Systems with Partial Monotonicity

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Acta Mathematicae Applicatae Sinica 2006年第2期22卷 243-256页

作者： jian-hua huang Xing-fu Zou Department of Mathematics National University of Defense Technology Changsha 410073 China Department of Mathematics and Statistics Memorial University of Newfoundland St. John's NF A1C5S7 Canada

This paper deals with the existence of travelling wave fronts of delayed reaction diffusion systems with partial quasi-monotonicity. We propose a concept of ＂desirable pair of upper-lower solutions＂, through which a subset can be constructed. We then apply the Schauder＇s fixed point theorem to some appropriate operator in this subset to obtain the existence of the travelling wave fronts.

关键词： Travelling wave fronts upper-lower solution partial monotonicity Schauder's fixed point theorem

Simulation Study on the Extension of Semi-flexible Polymer Chains in Cylindrical Channel

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Chinese Journal of Polymer Science 2019年第12期37卷 1290-1297,I0008页

作者： Yu Fu Fan Wu jian-hua huang Ying-Cai Chen Meng-Bo Luo Zhejiang Province Key Laboratory of Quantum Technology and Device Department of PhysicsZhejiang UniversityHangzhou 310027China Department of Chemistry Zhejiang Sci-Tech UniversityHangzhou 310018China Department of Physics Taizhou UniversityTaizhou 318000China

The scaling relations among the mean end-to-end distance of polymer along the channel,the polymer length N,and the effective diameter of channel De were investigated for flexible and semi-flexible polymer chains confined in long cylindrical *** the flexible polymer chain,scaling relation~NDe–0.7 was found in the classic de Gennes regime at lp2/b~NDe–1 in the transition regime lp1)and~De–0.7 in the classic de Gennes regime at larger De>xlp were *** simulation results revealed that the scaling relation in the transition regime was due to the rod-like behavior of the semi-flexible polymer in the small regime lp

关键词： Semi-flexible polymer Cylindrical channel Conformation Scaling relation Monte Carlo simulation

CLP gene family,a new gene family of Cotesia vestalis bracovirus inhibits melanization of Plutella xylostella hemolymph

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Insect Science 2021年第6期28卷 1567-1581页

作者： Ze-hua Wang Yue-Nan Zhou Xi-Qian Ye Xiao-Tong Wu Pei Yang Min Shi jian-hua huang Xue-Xin Chen Institute of Insect Science College of Agriculture and BiotechnologyZhejiang UniversityHangzhouChina Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects Zhejiang UniversityHangzhouChina Zhejiang Provincial Key Lab of Biology of Crop Pathogens and Insects Zhejiang UniversityHangzhouChina State Key Lab of Rice Biology Zhejiang UniversityHangzhouChina

Polydnaviruses(PDVs)are obligatory symbionts of parasitoid wasps and play an important role in suppressing host immune *** PDV genes that inhibit host melanization are known in Microplitis bracovirus,the functional homologs in Cotesia bracoviruses remain ***,we find that Cotesia vestalis bracovirus(CvBV)can inhibit hemolymph melanization of its host,Plutella xylostella larvae,during the early stages of parasitization,and that overexpression of highly expressed CvBV genes reduced host phenoloxidase ***,CvBV-7-I in particular reduced host phenolox-idase activity within 12 h,and the injection of anti-CvBV-7-1 antibody increased the melanization of parasitized host *** analyses showed that CvBV-7-1 and three homologs from other Cotesia bracoviruses possessed a C-terminal leucine/isoleucine-rich region and had a similar flinction in inhibiting ***,a new family of bracovirus genes was proposed and named as C-terminal Leucine/isoleucine-rich Protein(CLP).Ectopic expression of CvBV-7-1 in Drosophila hemocytes increased susceptibility to bacterial repression of melanization and reduced the melanotic encapsulation of par-asitized *** by the parasitoid Leptopilina *** formation rate of wasp pupae and the eclosion rate of *** were affected when the function of CvBV-7-1 was *** findings suggest that CLP genes from Cotesia bracoviruses encoded proteins that contain a C-terminal leucine/isoleucine-rich region and function as melanization inhibitors during the early stage of parasitization,which is important for successful parasitization.

关键词： host immunity immunosuppression new gene family Plutella xylostella polydnavirus wasp

CALCULATION OF CONFORMATIONAL ENTROPY AND FREE ENERGY OF POLYSILANE CHAIN

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Chinese Journal of Polymer Science 2001年第5期19卷 477-481页

作者： Meng-bo Luo Ying-cai Chen jian-hua huang jian-min Xu Department of Physics, Zhejiang University, Hangzhou 310028 China Department of Physics, Taizhou Teacher’s College, Taizhou 317000 China Department of Chemistry Zhejiang University Hangzhou 310028 China Zhejiang Univ Dept Phys Hangzhou 310028 Peoples R China Taizhou Teachers Coll Dept Phys Taizhou 317000 Peoples R China Zhejiang Univ Dept Chem Hangzhou 310028 Peoples R China

The conformational entropy S and free energy F were calculated by exact enumeration of polysilane chain up to 23 segments with excluded volume (EV) and long-range van der Waals (VW) interaction. A nonlinear relation between SEV+VW and chain length n was found though S-EV was found to vary linearly with n. We found that the second-order transition temperature of polysilane chain with VW interaction increases with the increase of chain length, while that of polysilane chain without VW interaction is chain length independent. Moreover, the free energies FEV+VW and F-EV are both linearly related with n, and FEV+VW < F-EV for all temperatures.

关键词： polysilane exact enumeration conformational entropy conformational free energy

SHAPE OF POLYMER CHAINS ON A TETRAHEDRAL LATTICE

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Chinese Journal of Polymer Science 2000年第5期18卷 419-422页

作者： jian-hua huang Me+ng-bo Luo Wen-hua jiang Shi-jun Han Department of Chemistry, Zhejiang University, Hangzhou 310027, China Department of Physics, Zhejiang University, Hangzhou 310027, China Zhejiang Univ Dept Chem Hangzhou 310027 Peoples R China Zhejiang Univ Dept Phys Hangzhou 310027 Peoples R China

The shape of unperturbed polymer chains was studied using the Monte Carlo technique on a tetrahedral lattice. The asphericity A, the ratios / and / were calculated for different Values of polymer chain length n, conformational energy epsilon (epsilon greater than or equal to 0) and temperature T. The asphericity A decreases with the increase of chain length and tends to reach its limiting value rapidly with the decrease of gamma (gamma = epsilon/k(B)T). For large n, A is about 0.525 +/- 0.005, the ratios / and / are about 2.7 and 12.0, respectively, and are almost independent of gamma, but for short chains, they depend on gamma.

关键词： shape polymer chain Monte Carlo technique

Expression and functional characterization of odorant-binding protein genes in the endoparasitic wasp Cotesia vestalis

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Insect Science 2021年第5期28卷 1354-1368页

作者： Yue-Nan Zhou Shuang Xie Jia-Ni Chen Ze-hua Wang Pei Yang Si-Cong Zhou Lan PangZ Fei Li Min Shi jian-hua huang Xue-Xin Chen nstitute of Insect Sciences College of Agriculture and BiotechnologyZhejiang UniversityHangzhou310058China Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insect Pests Zhejiang UniversityHangzhou310058China Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province Zhejiang UniversityHangzhou310058China State Key Lab of Rice Biology Zhejiang UniversityHangzhou310058China

Odorant-binding proteins(OBPs)are crucial in insect's olfactory perception,which participate in the initial step of odorant molecules transporting from the external environment to olfactory receptor *** better understand the roles for OBPs in olfactory perception in Cotesia vestalis,a solitary larval endoparasitoid of diamondback moth,Plutella xylostella,we have comprehensively screened the genome of ***,and obtained 20 CvesOBPs,including 18 classic OBPs and two minus-C ***-pattern analysis indicates that the motifs of *** OBPs are highly conserved in *** results of tissue expression analysis show that five OBPs(CvesOBP1/11/12/14/16)are highly expressed in male antennae,whereas six other OBP genes(CvesOBP7/8/13/17/18/19)are significantly transcriptionally enriched in female *** results of RNA interference experiments for three most highly expressed OBP genes(CvesOBP17/18/19)in female antennae demonstrate that they are likely involved in parasitic processes of female wasps,as the wasps take a longer time to target the hosts when they are knoc ked down.

关键词： Cotesia vestalis expression odorant-binding proteins parasitic bchavior phylogenetic analyses RNA interference

Hypoxia inducible factor-1α mediates protective effects of ischemic preconditioning on ECV-304 endothelial cells

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World Journal of Gastroenterology 2007年第16期13卷 2369-2373页

作者： Liu-Bin Shi jian-hua huang Bao-San Han Department of Organ Transplantation Huashan Hospital Fudan University Shanghai 200040 China Institute of Integrative Medicine Huashan Hospital Fudan University Shanghai 200040 China Department of General Surgery Ruijin Hospital School of Medicine Shanghai Jiaotong University Shanghai 200025 China

AIM: To investigate whether hypoxia inducible factor-1α (HIF-1α) is linked to the protective effects of ischemic preconditioning (IP) on sinusoidal endothelial cells against ischemia/reperfusion injury. METHODS: Sinusoidal endothelial cell lines ECV-304 were cultured and divided into four groups: control group, cells were cultured in complete DMEM medium; cold anoxia/warm reoxygenation (A/R) group, cells were preserved in a 4℃ UW solution in a mixture of 95% N2 and 5% CO2 for 24 h; anoxia-preconditioning (APC) group, cells were treated with 4 cycles of short anoxia and reoxygenation before prolonged anoxia- preconditioning treatment; and anoxia-preconditioning and hypoxia inducible factor-1α (HIF-1α) inhibitor (I-HIF-1) group, cells were pretreated with 5 μm of HIF-1α inhibitor NS398 in DMEM medium before subjected to the same treatment as group APC. After the anoxia treatment, each group was reoxygenated in a mixture of 95% air and 5% CO2 incubator for 6 h. Cytoprotections were evaluated by cell viabilities from Trypan blue, lactate dehydrogenase (LDH) release rates, and intracellular cell adhesion molecule-1 (ICAM-1) expressions. Expressions of HIF-1α mRNA and HIF-1α protein from each group were determined by the RT-PCR method and Western blotting, respectively. RESULTS: Ischemia preconditioning increased cell viability, and reduced LDH release and ICAM-1 expressions. Ischemia preconditioning also upregulated the HIF-1α mRNA level and HIF-1α protein expression. However, all of these changes were reversed by HIF-1α inhibitor ***: Ischemia preconditioning effectively inhibited cold hypoxia/warm reoxygenation injury to endothelial cells, and the authors showed for the first time HIF-1α is causally linked to the protective effects of ischemic preconditioning on endothelial cells.

关键词： Preconditioning Anoxia/reoxygenation injury Reperfusion injury Endothelial cells Hypoxia inducible factor-1α

Ab Initio Study of the Reaction: H + SO_2→HO + SO

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Chinese Chemical Letters 1998年第2期9卷 181-185页

作者： Rong Shun ZHU jian hua huang Ke Li HAN and Guo Zhong HE(State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023) Chinese Acad Sci Dalian Inst Chem Phys State key Lab Mol React Dynam Dalian 116023 Peoples R China

The reaction of H+ SO2→HO + SO was theoretically investigated sing ab initio MOmethods, and HF/TZV (d, p) level of theory was employed to locate stationary points which werethen characterized by calculation of the vibrational frequencies. Energies were estimated at the optimized geometries using MP2/TZV (d, p) calculations. The results show that the caIculated geometries- frequencies. and thermochemical data were in good agreement with available experi-mental values. The IRC calculations confirmed that nonplanar HSO2 and HOSO adducts shouldbe more reasonable than those of planar conformation.

关键词： Hydrogen Sulfur dioxtde Reaction Ab initio calculation

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一类分裂变分不等式及其收敛算法

数学学报（中文版） 2015年第6期58卷 1035-1044页

作者：黄志霞黄建华福州大学数学与计算机科学学院福州350108

引入一种新的分裂变分不等式问题,构造了两种算法来求解,得到了相应迭代序列的弱收敛性和强收敛性.

关键词：分裂变分不等式问题非扩张弱收敛强收敛