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Search Results: 1 - 10 of 33535 matches for " Min Jia "
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Gene expression related to growth axis and gonadal axis in puberty rats
WU Jia-Min
Zhong Xi Yi Jie He Xue Bao , 2003,
Abstract: Objective: To elucidate the effect and effective mechanism of gonadotropin-releasing hormone analog (GnRHa) on growth axis and gonadal axis in puberty rats. Methods: After injecting GnRHa on puberty rats, hypothalamus, pituitary, ovary and epiphyseal cartilage of legs were taken, and related gene expression was detected by fluorescence quantitative PCR (FQ-PCR). Results: GnRHa could reduce the gene expression of gonadotropin-releasing hormone (GnRH) in hypothalamus and its receptor (GnRHR) in pituitary, increase the gene expression of growth hormone releasing inhibiting hormone (SRIH), and not affect the gene expression of growth hormone releasing hormone (GHRH) in hypothalamus. And GnRHa could reduce the gene expression of growth hormone (GH) in pituitary, estrogen receptor (ER) in ovary and insulin-like growth factors-I (IGF-1) in epiphyseal cartilage of legs. Conclusion: Besides restraining the gene expression of GnRHR in pituitary and leading to descent regulation of receptor, GnRHa can reduce the gene expression of GnRH in hypothalamus and down-regulate gonadal hormone level. At last, GnRHa can reduce the maturity degree and pace of the second sexual characteristics. By means of increasing the gene expression of SRIH in hypothalamus, GnRHa can reduce the gene expression of GH in pituitary and IGF-1 in epiphyseal cartilage of legs. It could be one of the mechanisms of GnRHa reducing epiphyseal maturity for the patients with idiopathic central precocious puberty.
Temporal Dynamic Appearance Modeling for Online Multi-Person Tracking
Min Yang,Yunde Jia
Computer Science , 2015,
Abstract: Robust online multi-person tracking requires the correct associations of online detection responses with existing trajectories. We address this problem by developing a novel appearance modeling approach to provide accurate appearance affinities to guide data association. In contrast to most existing algorithms that only consider the spatial structure of human appearances, we exploit the temporal dynamic characteristics within temporal appearance sequences to discriminate different persons. The temporal dynamic makes a sufficient complement to the spatial structure of varying appearances in the feature space, which significantly improves the affinity measurement between trajectories and detections. We propose a feature selection algorithm to describe the appearance variations with mid-level semantic features, and demonstrate its usefulness in terms of temporal dynamic appearance modeling. Moreover, the appearance model is learned incrementally by alternatively evaluating newly-observed appearances and adjusting the model parameters to be suitable for online tracking. Reliable tracking of multiple persons in complex scenes is achieved by incorporating the learned model into an online tracking-by-detection framework. Our experiments on the challenging benchmark MOTChallenge 2015 demonstrate that our method outperforms the state-of-the-art multi-person tracking algorithms.
The Benefits of Exogenous NO: Enhancing Arabidopsis to Resist Botrytis cinerea  [PDF]
Hongyu Yang, Xiaodan Zhao, Jia Wu, Min Hu, Shaolei Xia
American Journal of Plant Sciences (AJPS) , 2011, DOI: 10.4236/ajps.2011.23060
Abstract: Botrytis cinerea is a necrotrophic fungal pathogen that impacts a wide range of hosts, including Arabidopsis. Pretreatment with nitric oxide (NO) donor sodium nitroprusside (SNP) on Arabidopsis leaves suppressed Botrytis cinerea infection development. Additionally, in this study the dosage levels of SNP applied to the leaves had no direct, toxic impact on the development of the pathogen. The relationship between NO and reactive oxidant species (ROS) was studied by using both spectrophotometrical methods and staining leaf material with fluorescent dyes, nitro blue tetrazolium (NBT), and with 3,3-diaminobenzidine (DAB). The results showed that exogenous NO restrained the generation of ROS, especially H2O2, as the pathogen interacted with the Arabidopsis plant. And this inhibition of reactive oxidant burst coincided with delay infection development in NO-supplied leaves. The influence of elevated level of NO on antioxidant enzymes was investigated in this study. The activities of catalase (CAT) and guaiacol peroxidase (POD) were increased to different degrees in both: 1) SNP treated only leaves, and 2) SNP pretreated leaves that were subsequently inoculateted with pathogens. However, the activity of superoxide dismutase (SOD) was unchanged in the leaves studied. The decrease in H2O2 content probably resulted from the increase in activities of POD and CAT. Our study suggests that NO might trigger some metabolic reactions, i.e. enhanced enzyme activity that restrains H2O2 which ultimately results in resistance to B. cinerea infection.
Flexible GPBi-CG Method for Nonsymmetric Linear Systems  [PDF]
Jia-Min Wang, Tong-Xiang Gu
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.34050
Abstract: We present a flexible version of GPBi-CG algorithm which allows for the use of a different preconditioner at each step of the algorithm. In particular, a result of the flexibility of the variable preconditioner is to use any iterative method. For example, the standard GPBi-CG algorithm itself can be used as a preconditioner, as can other Krylov subspace methods or splitting methods. Numerical experiments are conducted for flexible GPBi-CG for a few matrices including some nonsymmetric matrices. These experiments illustrate the convergence and robustness of the flexible iterative method.

Chen Jia-min,

金属学报 , 1978,
Abstract: A formula for the calculation of rolling pressure has been derived on the following bases: flat compression instead of fiat rolling is adopted; contacting area is differentiated according to different friction role; theory of plasticity of constant strain energy is assumed.The formula thus derived may be applied with given calculating charts of rolling pressure and roll-elastic flattening which renders the rolling pressure calculation very much simplified.
Complete Affine K$\ddot{a}$hler Manifolds
Fang Jia,An-Min Li
Mathematics , 2010,
Abstract: In this paper we prove that for a complete, connected and oriented K\"{a}ler affine manifold $(M,G)$ of dimension $n,$ if it is K\"ahler affine Ricci flat or the K$\ddot{a}$hler affine scalar curvature $S\equiv0,$ ($n\leq 5$), then the universal covering manifold $\widetilde{M}$ of $M$ is isometric to the Euclidean n-space $E^{n}$.
Overexpression of MyoD Attenuates Denervated Rat Skeletal Muscle Atrophy and Dysfunction  [PDF]
Wei-Min Xiong, Jia-Hui Huang, Lei Xie, Yuan Qiao, Xin-Min Lu, Jiang-Chen Peng, Jin-Jia Hu
Neuroscience & Medicine (NM) , 2012, DOI: 10.4236/nm.2012.34048
Abstract: Nerve injury commonly contributes to irreversible functional impairment, reconstruction of the function of muscle is big challenge. In denervated skeletal muscle, therapid expression of MyoD mRNA and protein also occurs during early postdenervation, which suggested that the function of denervation-induced MyoD may be to prevent denervation-induced skeletal muscle atrophy. However, the detail mechanism is not clear. Therefore, in this study, we established a stable-transfected MyoD L6 cell line. After the operation for cutting the rats’ tibial nerve, the MyoD-L6 cells were injected in the gastrocnemius, the function of the gastronemius was monitored. It was found that injected the MyoD-L6 cells could attenuate the muscle atrophy and dysfunction. Therefore, overexpression of MyoD could serve as a new therapy strategy to cure denervation-induced dysfunction of skeletal muscle.
Poly[[{μ4-2,2′-[butane-1,4-diylbis(sulfanediyl)]bis(1,3,4-thiadiazole)}silver(I)] perchlorate sesquihydrate]
Jia-Jia Li,Wei-Min Zhu
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812022957
Abstract: In the polymeric title compound, {[Ag(C8H10N4S4)]ClO4·1.5H2O}n, the AgI atom has a slightly distorted trigonal-planar coordination geometry provided by three N-atom donors from the thiadiazole rings of three symmetry-related 2,2′-[butane-1,4-diylbis(sulfanediyl)]bis(1,3,4-thiadiazole) ligands. Centrosymmetrically related AgI atoms are bridged by the N–N fragments of rings, forming six-membered dinuclear metallacycles, which are further linked by the alkyl spacers of the thiadiazole ligands into a layer network extending parallel to (0-21). The crystal structure is stabilized by intermolecular O—H...O hydrogen bonds. The O atoms of the perchlorate anion and one water molecule are disordered over two sets of sites with refined occupancy ratios of 0.640 (6):0.360 (6) and 0.663 (11):0.337 (11), respectively. The second water molecule shows half-occupancy.
Uniqueness and Asymptotic Behavior of Positive Solutions for a Fractional-Order Integral Boundary Value Problem
Min Jia,Xin Liu,Xuemai Gu
Abstract and Applied Analysis , 2012, DOI: 10.1155/2012/294694
Abstract: We study a model arising from porous media, electromagnetic, and signal processing of wireless communication system ,  ,   ,   , where ,   and , is the standard Riemann-Liouville derivative, is linear functionals given by Riemann-Stieltjes integrals, is a function of bounded variation, and can be a changing-sign measure. The existence, uniqueness, and asymptotic behavior of positive solutions to the singular nonlocal integral boundary value problem for fractional differential equation are obtained. Our analysis relies on Schauder's fixed-point theorem and upper and lower solution method.
DNA Barcodes Provide a Quick Preview of Mitochondrial Genome Composition
Xiang Jia Min, Donal A. Hickey
PLOS ONE , 2007, DOI: 10.1371/journal.pone.0000325
Abstract: DNA barcodes have achieved prominence as a tool for species-level identifications. Consequently, there is a rapidly growing database of these short sequences from a wide variety of taxa. In this study, we have analyzed the correlation between the nucleotide content of the short DNA barcode sequences and the genomes from which they are derived. Our results show that such short sequences can yield important, and surprisingly accurate, information about the composition of the entire genome. In other words, for unsequenced genomes, the DNA barcodes can provide a quick preview of the whole genome composition.
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