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Search Results: 1 - 10 of 11408 matches for " Jichun Xing "
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A taxonomic study on the genus Japananus Ball (Hemiptera, Cicadellidae, Deltocephalinae), with description of one new species from China
Jichun Xing,Renhuai Dai,Zizhong Li
ZooKeys , 2008, DOI: 10.3897/zookeys.3.24
Abstract: The paper deals with four species of the genus Japananus Ball, 1931 (Hemiptera, Cicadellidae, Deltocephalinae), including one new species from Sichuan Province, China, Japananus bicurvatus sp. nov.. A key is given to distinguish all species of the genus, and illustrations of genitalia are provided. The type specimens of the new species are deposited in the Institute of Entomology, Guizhou University (IEGU).
Taxonomic study of the genus Neurotettix Matsumura (Hemiptera, Cicadellidae, Deltocephalinae) with a description of a new species from China
Renhuai Dai,Jichun Xing,Zizhong Li
ZooKeys , 2011, DOI: 10.3897/zookeys.82.1158
Abstract: This paper treats all four known species of the genus Neurotettix Matsumura, 1914 (Hemiptera, Cicadellidae, Deltocephalinae), including one new species: Neurotettix truncatus sp. n. from China. A key is given to distinguish all species of the genus, and illustrations of genitalia are provided.
Extinction for fast diffusion equations with nonlinear sources
Yuxiang Li,Jichun Wu
Electronic Journal of Differential Equations , 2005,
Abstract: We establish conditions for the extinction of solutions, in finite time, of the fast diffusion problem $u_t=Delta u^m+lambda u^p$, 0 less than $m$ less than 1, in a bounded domain of $R^N$ with $N$ greater than 2. More precisely, we show that if p greater than m, the solution with small initial data vanishes in finite time, and if $p$ less than $m$, the maximal solution is positive for all $t$ greater than $0$. If $p=m$, then first eigenvalue of the Dirichlet problem plays a role.
Study on Quality Traits for Steamed Bread Made from 25 Representative Wheat Varieties in Shandong Province  [PDF]
Juan Liu, Jichun Tian, Peng Wu, Xiangyang Li, Chao Li
Agricultural Sciences (AS) , 2019, DOI: 10.4236/as.2019.104039
Abstract: In order to study steamed bread quality traits and explore good wheat cultivars, 25 wheat cultivars grown in Shandong province were used through one-process fermentation procedure to examine the variability of steamed bread quality traits and the correlation between quality and score. The results showed that all the steamed bread quality traits expressed large variable coefficient except volume, L* value, l* value and cohesiveness traits, which suggested that the genetic diversity made from wheat in Shandong province was large. The average comprehensive score of the steamed bread was 76.8 for the tested 25 varieties, and ten varieties reached the good steamed bread level, which were Liangxing 99, Luyuan 205, Jimai 22, Jinan 17, Tainong 19, Wennong 17, Huaiyin 84137, and Huaimai 8. The main quality factors affecting the steamed bread score were volume, L* value, A* value, hardness, chewiness, and adhesiveness. Among these factors, the adhesiveness has a significantly positive correlation with the hardness and cohesive, and the volume has a significantly positive correlation with the A* value. The volume, L* value has a significantly positive correlation with score, A* value, hardness and chewiness, and gumminess has a significantly negative correlation with the score. There was no correlation between the score and other traits. The results will benefit the understanding of steamed bread quality in wheat cultivated in Shandong.
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QTL Mapping for chinese northern-style steamed bread specific volume  [PDF]
Peng Wu, Bin Liu, Tao Zhou, Zhuokun Li, Jichun Tian, Haiyun Du, Jiteng Wang
Agricultural Sciences (AS) , 2011, DOI: 10.4236/as.2011.23028
Abstract: In this study, quantitative trait loci (QTLs) with additive effects, epistatic effects for CNSB specific volume in bread wheat (Triticum aestivum L.), were studied in cultivars Huapei 3 and Yumai 57 (Triticum aestivum L.). The DH population and the parents were planted in 2007 and 2008 in Tai’An and 2008 in Suzhou. QTL analyses were performed using the software of IciMapping v2.2 based on the mixed linear model. Five putative QTLs for CNSB specific volume were detected on 5 chromosomes where single QTLs explained 5.11% to 9.75% of phenotypic variations. All of them had negative effects on specific volume and were contributed by Yumai 57 alleles. Qsv-1B was detected in both environment 1 and 3 with 13.88% and 4.83% phenotypic variations which had positive effects and was transmitted by Huapei 3 alleles. Fourteen pairs of QTLs with epistatic effects were detected for specific volume. Seven major QTLs, Qsv-1B/Qsv-3A, Qsv-2D/Qsv-3A, Qsv-3A/Qsv- 5B1, Qsv-1B/Qsv-6D, Qsv-2D/Qsv-4D, Qsv-4A/ Qsv-6B and Qsv-3A/Qsv-7D could account for 13.88%、20.39%、18.88%、12.31%、18.78%、11.98%, and 17.05% of the phenotypic variation of specific volume. The information obtained in this study will be useful for manipulating the QTLs for CNSB specific volume property by molecular marker-assisted selection (MAS).
Cytokines in the Progression of Pancreatic β-Cell Dysfunction
Chunjiong Wang,Youfei Guan,Jichun Yang
International Journal of Endocrinology , 2010, DOI: 10.1155/2010/515136
Abstract: The dysfunction of pancreatic β-cell and the reduction in β-cell mass are the decisive events in the progression of type 2 diabetes. There is increasing evidence that cytokines play important roles in the procedure of β-cell failure. Cytokines, such as IL-1β, IFN-γ, TNF-α, leptin, resistin, adiponectin, and visfatin, have been shown to diversely regulate pancreatic β-cell function. Recently, islet-derived cytokine PANcreatic DERived factor (PANDER or FAM3B) has also been demonstrated to be a regulator of islet β-cell function. The change in cytokine profile in islet and plasma is associated with pancreatic β-cell dysfunction and apoptosis. In this paper, we summarize and discuss the recent studies on the effects of certain important cytokines on pancreatic β-cell function. The imbalance in deleterious and protective cytokines plays pivotal roles in the development and progression of pancreatic β-cell dysfunction under insulin-resistant conditions. 1. Introduction Diabetes is a chronic disease that occurs when pancreatic islets fail to produce sufficient insulin and/or the sensitivity of glucose-metabolizing tissues to insulin decreases. Chronic hyperglycemia may lead to serious damage to many organs and cause the impairment of insulin production and action. The mechanisms of islet β cell failure are different in the progression of type 1 and type 2 diabetes. In the progression of type 1 diabetes, pancreatic islet β cells are mainly destructed by autoimmune-mediated apoptosis, leading to the loss of insulin production. Inflammatory cytokines play crucial roles in this process [1]. In the progression of type 2 diabetes, the failure of β-cell function and β-cell mass reduction are predominantly associated with the increase in circulating cytokines and in free fatty acids (FFAs) and with persistent hyperglycemia [2]. Chronic exposure of β cell to these mediators induces excessive production of reactive oxygen species (ROS) and activation of caspases, which inhibit insulin secretion and promote apoptosis of pancreatic β cells [3]. In the past decades, it had been well established that inflammatory cytokines including IL-1β, TNF-α, and IFN-γ play a critical role in the pathogenesis of type 1 diabetes. At the early stage of type 1 diabetes, some immune cells such as lymphocytes and macrophages infiltrate into the islets of pancreas and secrete inflammatory cytokines, resulting in high concentrations of cytokines within islets [1]. Chronic exposure of β cells to IL-1β, TNF-α, and IFN-γ finally induces islet dysfunction and β cell apoptosis. Since the discovery
On stochastic modeling of groundwater flow and solute transport in multi-scale heterogeneous formations
Hu, Bill X.;Wu, Jichun;He, Changming;
Computational & Applied Mathematics , 2004,
Abstract: a numerical moment method (nmm) is applied to study groundwater flow and solute transport in a multiple-scale heterogeneous formation. the formation is composed of various materials and conductivity distribution within each material is heterogeneous. the distribution of materials in the study domain is characterized by an indicator function and the conductivity field within each material is assumed to be statistically stationary. based on this assumption, a general expression is derived for the covariance function of the composite field in terms of the covariance of the indicator variables and the statistical properties of the composite materials. the nmm is used to investigate the effects of various uncertain parameters on flow and transport predictions in two case studies. it is shown from the study results that the two-scale stochastic processes of heterogeneity will both significantly influence the flow and transport predictions, especially for the variances of hydraulic head and solute fluxes. this study also shows that the nmm can be used to study flow and transport in complex subsurface environments. therefore, the method may be applicable to complex environmental projects.
EXTRACTION OF MERCAPTOACETIC ACID BY PETROLEUM SULFOXIDE
石油亚砜萃取巯基醋酸的研究

Jin Jichun,
金寄春

环境科学学报 , 1989,
Abstract: 对石油亚砜(PSO)萃取巯基醋酸的条件和影响进行了实验研究,确定了石油亚砜通过氢键和巯基醋酸形成的萃合物的组成.为从废水中回收巯基醋酸以及石油硫醚的综合利用提供了依据.
[2-(4-Chlorophenyl)-1,3-selenazol-4-yl]methanol
Jichun Cui,Chuan Li,Yanling Qiao
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812048088
Abstract: In the title compound, C10H8ClNOSe, the dihedral angle between benzene and selenazole rings is 11.4 (3)° and the hydroxymethyl group is bent from the selenazole ring, making a dihedral angle of 63.8 (3)°. In the crystal, molecules are linked into inversion dimers by pairs of O—H...N hydrogen bonds. Roof-tile-like stacking of the molecules along [010] [b = 4.5707 (4) ] is observed, with the benzene and selenazole rings separated by a face-to-face distance of 3.57 and a mutual slippage of 2.85 .
trans-Tris(4-bromophenyl)dichloridoantimony(V)
Yanling Qiao,Jin Jiang,Jichun Cui
Acta Crystallographica Section E , 2012, DOI: 10.1107/s160053681204809x
Abstract: The SbV atom in the title compound, [SbCl2(C6H4Br)3], has an almost regular trigonal–bipyramidal geometry with the equatorial plane made up of three C atoms of the bromophenyl groups and the axial positions occupied by two Cl ions in a trans configuration. In the crystal, C—H...Br hydrogen bonds link the molecules into zigzag chains along the b-axis direction. Pairs of C—H...Cl hydrogen bonds further link molecules into cyclic dimers with R22(10) ring motifs, generating a three-dimensional network.
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