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Search Results: 1 - 10 of 13066 matches for " YIN Jianhua "
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Stress Responses of Shewanella
Jianhua Yin,Haichun Gao
International Journal of Microbiology , 2011, DOI: 10.1155/2011/863623
Abstract: The shewanellae are ubiquitous in aquatic and sedimentary systems that are chemically stratified on a permanent or seasonal basis. In addition to their ability to utilize a diverse array of terminal electron acceptors, the microorganisms have evolved both common and unique responding mechanisms to cope with various stresses. This paper focuses on the response and adaptive mechanism of the shewanellae, largely based on transcriptional data.
FE Modelling of Seepage in Embankment Soils with Piping Zone
FE MODELLING OF SEEPAGE IN EMBANKMENT SOILS WITH PIPING ZONE

Yin Jianhua,
YinJianhua

岩石力学与工程学报 , 1998,
Abstract: A finite element model based on continuum mechanics is established to simulate the seepage now in embankment soils with piping zone. The focus is placed on the piping zone length and permeability ratio k/k0 and the influence on seepage flow. Main finite element results are presented and discussed. Measures for preventing piping failures are presented.
Stress Responses of Shewanella
Jianhua Yin,Haichun Gao
International Journal of Microbiology , 2011, DOI: 10.1155/2011/863623
Abstract: The shewanellae are ubiquitous in aquatic and sedimentary systems that are chemically stratified on a permanent or seasonal basis. In addition to their ability to utilize a diverse array of terminal electron acceptors, the microorganisms have evolved both common and unique responding mechanisms to cope with various stresses. This paper focuses on the response and adaptive mechanism of the shewanellae, largely based on transcriptional data. 1. Introduction Stress is an inevitable part of the life of all organisms. This is especially true about microorganisms, which reside and thrive in almost all environments on earth, including some considered extremely harsh [1]. Common environmental factors that affect the activities of microorganisms include temperature, pH, water availability, nutrient limitation, presence of various chemicals, osmolarity, pressure, and radiation [2]. Consequently, for every microorganism the ability to adapt rapidly to changes in environments is essential for its survival and prosperity. Regulation that modulates the microbial adaptation to environmental disturbances is rather complex. The most important and efficient control occurs at the level of transcription. Many single stress-induced regulatory circuits have been identified, which enable cells to cope with specific stresses. However, given that microbial cells live in a dynamic environment where multiple factors fluctuate constantly at the same time, stress responses are generally carried out by a regulatory network composed of a series of individual circuits which are highly connected [3]. Most of our understanding of microbial stress response mechanisms has come from the study of model microorganisms, particularly Escherichia coli and Bacillus subtilis. Extensive physiological and genetic analyses of the stress response systems in these two bacteria have helped us to elucidate the complexity of the process, function of critical proteins, and regulation [4]. While model organisms will continue to provide insights into the fundamental properties of the stress response systems, efforts should be extended to other microorganisms, especially those that are of scientific, environmental, and economic importance. As one of representatives, the family of Shewanellaceae (order Alteromonadales, class γ-proteobacteria) is emerging in recent years. The genus Shewanella consists of rod-shaped, Gram-negative, aerobic or facultatively anaerobic, polarly flagellated, readily cultivated γ-proteobacteria [5–8]. While many Shewanella isolates remain uncharacterized, 52 species have been
EQUIVALENT TIME AND ELASTIC VISCO-PLASTIC MODELLING OF GEOMATERIALS
等效时间和岩土材料的弹粘塑性模型

Yin Jianhua,
殷建华

岩石力学与工程学报 , 1999,
Abstract: The concepts of equivalent time, reference time line etc. are introduced and a simple onedimensional elastic viscoplastic model(1D EVP) is derived. Yin and Grahams 1D EVP model and its verification are also introduced. The creep data of a marine clay and a soft salt rock are used to examine the loadinghistory independence of equivalent time and creep strain rate. It is shown that the general 1D EVP model will approach to the elastic line and the reference time line(elasticplastic line)when the creep parameter /V approches to zero.
Cyclic AMP-Dependent Protein Kinase A Regulates the Alternative Splicing of CaMKIIδ
Qingqing Gu, Nana Jin, Hongzhuan Sheng, Xiaomin Yin, Jianhua Zhu
PLOS ONE , 2011, DOI: 10.1371/journal.pone.0025745
Abstract: Ca2+/calmodulin-dependent protein kinase (CaMK) IIδ is predominantly expressed in the heart. There are three isoforms of CaMKIIδ resulting from the alternative splicing of exons 14, 15, and 16 of its pre-mRNA, which is regulated by the splicing factor SF2/ASF. Inclusion of exons 15 and 16 or of exon 14 generates δA or δB isoform. The exclusion of all three exons gives rise to δC isoform, which is selectively increased in pressure-overload-induced hypertrophy. Overexpression of either δB or δC induces hypertrophy and heart failure, suggesting their specific role in the pathogenesis of hypertrophy and heart failure. It is well known that the β-adrenergic-cyclic AMP-dependent protein kinase A (PKA) pathway is implicated in heart failure. To determine the role of PKA in the alternative splicing of CaMKIIδ, we constructed mini-CaMKIIδ genes and used these genes to investigate the regulation of the alternative splicing of CaMKIIδ by PKA in cultured cells. We found that PKA promoted the exclusion of exons 14, 15, and 16 of CaMKIIδ, resulting in an increase in δC isoform. PKA interacted with and phosphorylated SF2/ASF, and enhanced SF2/ASF's activity to promote the exclusion of exons 14, 15, and 16 of CaMKIIδ, leading to a further increase in the expression of δC isoform. These findings suggest that abnormality in β-adrenergic-PKA signaling may contribute to cardiomyopathy and heart failure through dysregulation in the alternative splicing of CaMKIIδ exons 14, 15, and 16 and up-regulation of CaMKIIδC.
Testing for homogeneity of gametic disequilibrium across strata
Xiaolin Yin, Wenqing Ma, Manlai Tang, Jianhua Guo
BMC Genetics , 2007, DOI: 10.1186/1471-2156-8-85
Abstract: Using the likelihood score theory generalized to nuisance parameters we derive a score test for homogeneity of gametic disequilibrium across several independent populations. Simulation results demonstrate that the empirical type I error rates of our score homogeneity test perform satisfactorily in the sense that they are close to the pre-chosen 0.05 nominal level. The associated power and sample size formulae are derived. We illustrate our test with a data set from a study of the cystic fibrosis transmembrane conductance regulator gene.We propose a large-sample homogeneity test on gametic disequilibrium across several independent populations based on the likelihood score theory generalized to nuisance parameters. Our simulation results show that our test is more reliable than the traditional test based on the Fisher's test of homogeneity among correlation coefficients.Measuring gametic disequilibrium can provide important information about aspects of population histories and mating behavior [1] and can be useful in locating disease genes [2]. The term gametic disequilibrium is used in this article instead of the traditional term linkage disequilibrium to measure the extent of non-random association because such non-random association may be present between unlinked loci [3]. Various measures of gametic disequilibrium have been proposed [4-6], ranging from pairs of diallelic loci model to multiple multiallelic loci model. In this article, we consider the gametic disequilibrium which is defined as the difference between the gametic probability and its expected probability under the assumption of no statistical association of alleles, and the gametic disequilibrium calculations are based on two-allele, two-locus model [7].Consider two loci, A and B, each having two possible alleles (A0, A1) and (B0, B1), respectively. With two loci and two alleles, there are four possible gametes, namely, A0B0, A0B1, A1B0 and A1B1. The gametic disequilibrium between the two loci is def
Root and xylem ABA changes in response to soil drying in two woody plants
Huafang Wang,Jianhua Zhang,Jiansheng Liang,Weilun Yin
Chinese Science Bulletin , 1999, DOI: 10.1007/BF02885929
Abstract: Two woody plants,Platycladus orientalise (tolerant to drought) andAcacia auriculiformis (sensitive to drought), have been subjected to rapid and slow soil drying. ABA levels in their roots and xylem sap have been determined using radioimmunoassay (RIA, sensitivity is 0.4 pmol per assay vial) with a monoclonal antibody against ( + )-ABA. ABA contents ofP. orientalise andA. auriculiformis growing in well watered soil are 0.3 and 2.5 nmol · g ow 1 in roots and 1.6 and 0.4 μmol in xylem saps, respectively. A rapid soil drying has been applied to these two plants with soil water content (SWC) being reduced to 0.02 and 0.06 g · g ow 1 respectively. Under such treatment, ABA was increased by 22 times and 2 times in roots and by 7 times and 34 times in xylem saps respectively forP. orientalise andA. auriculiformis. After rewatering for 6 d, ABA in roots and xylem sap of both species returned to control levels. When a slow soil drying was applied, SWC was reduced to 0.1 and 0.13 g · g OW 1 respectively forP. orientalise andA. auriculiformis. ABA was increased by 5 times and 1.6 times in roots and by 6 times and 19 times in xylem saps respectively for these two plants. ABA in roots and xylem saps decreased to near control levels 8 d after watering. Plant leaf water potentials of both plants hardly changed at times when root and xylem ABA showed substantial increase in response to soil drying. It is concluded that ABA levels in the roots and xylem saps ofP. orientalise andA. auriculiformis are more sensitively regulated than leaf water potential in response to soil drying and can act as a chemical signal in root-shoot communications of the drought stress.
Responses of woody plant root and xylem sap ATP to soil drying
Huafang Wang,Jianhua Zhang,Jiansheng Liang,Weilun Yin
Chinese Science Bulletin , 1999, DOI: 10.1007/BF02885959
Abstract: The ATP in roots and xylem sap of two woody plant species,Platycladus orientalis andAcacia auriculiformis, subjected to rapid and slow soil drying has been determined employing firefly luciferase ATP assay method (sensitivity is at 10-12 mol ATP L-1). The ATP levels in the two species were 1.6 nmol· gDW -1, and 0.6 nmol· gDW -1 in roots, and 5.6 μmol· m-3 and 8 μmol · m-3 in xylem sap, respectively. When plants ofP. orientalis andA. auriculiformis were subjected to rapid soil drying, respectively, as soil water content (SWC) decreased from the normal level ( 0. 25 g · gDW -1) to 0.02 and 0.06 g · gDW -1, separately, plant water potential (Ψ) dropped to -4 and -3.2 MPa, differently, the ATP in roots decreased 99.7% and 42%, respectively. When the rapidly dried soil was watered for up to 6 d, SWC and Ψ were found to recover to their normal levels, but ATP content in roots ofP. orientalis andA. auriculifomis recovered by 10% and 23%, respectively. When plants ofP. orientalis andA. auriculiformis were subjected to slow soil drying, respectively, as SWC was found to decrease from the normal level to 0.1 and 0.13 g· gDW -1, separately, Ψ dropped to -2.5 and -2 MPa, differently, the ATP content in roots decreased 98% and 38%, respectively. When the slowly dried soil was watered for up to 8 d, ATP levels in roots ofP. orientalis andA. auriculiformis recovered by 30% and 24%, respectively. However, ATP concentrations in xylem sap were not directly influenced by either SWC or Ψ. The plot dots of xylem sap ATP concentration versus root ATP content were found to be distributed diagonally. It is concluded that ATP in roots is more sensitive in response to SWC changes than that to Ψ and root-sourced ATP is a source of that in xylem sap. When plants are subjected to slow soil drying, the ATP levels in both root and xylem sap are higher than that to rapid soil drying.
Rateless Codes with Progressive Recovery for Layered Multimedia Delivery
Zhao Chen,Liuguo Yin,Mai Xu,Jianhua Lu
Mathematics , 2012,
Abstract: This paper proposes a novel approach, based on unequal error protection, to enhance rateless codes with progressive recovery for layered multimedia delivery. With a parallel encoding structure, the proposed Progressive Rateless codes (PRC) assign unequal redundancy to each layer in accordance with their importance. Each output symbol contains information from all layers, and thus the stream layers can be recovered progressively at the expected received ratios of output symbols. Furthermore, the dependency between layers is naturally considered. The performance of the PRC is evaluated and compared with some related UEP approaches. Results show that our PRC approach provides better recovery performance with lower overhead both theoretically and numerically.
Unequal Error Protected JPEG 2000 Broadcast Scheme with Progressive Fountain Codes
Zhao Chen,Mai Xu,Luiguo Yin,Jianhua Lu
Mathematics , 2012,
Abstract: This paper proposes a novel scheme, based on progressive fountain codes, for broadcasting JPEG 2000 multimedia. In such a broadcast scheme, progressive resolution levels of images/video have been unequally protected when transmitted using the proposed progressive fountain codes. With progressive fountain codes applied in the broadcast scheme, the resolutions of images (JPEG 2000) or videos (MJPEG 2000) received by different users can be automatically adaptive to their channel qualities, i.e. the users with good channel qualities are possible to receive the high resolution images/vedio while the users with bad channel qualities may receive low resolution images/vedio. Finally, the performance of the proposed scheme is evaluated with the MJPEG 2000 broadcast prototype.
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