Effective role of CaO

In the present work, the effect of the CaO/P2O5 ratio on the composition of sol-gel synthesized 58SiO2-(19 x)P2O5–(23 + x)CaO (x = 0, 5, 10 and 15 mol%) glass samples was studied. Further, the effect of NBO/BO ratio on hydroxy carbonated apatite layer (HCA) forming ability based on dissolution behavior in simulated body fluid (SBF) solution was also investigated. CaO/P2O5 ratios of synthesized glass samples were 1.2, 2, 3.6, and 9.5, respectively. NBO/BO ratios were obtained using Raman spectroscopic analysis as 0.58, 1.20, 1.46, and 1.78, respectively.

10p kequaidan1 16-11-2019 20 0   Download

Research objectives: Developing and systemizing the theoretical issues in terms of investment in enhancing competitive capacity at commercial banks; through theory and practice, confirming a extremely critical role of investment in enhancing competitive capacity for development of them in general and VCB in particularly. Depending on each period, development strategy, competition strategy and characteristics, banks implement appropriate investments; finding out the solutions for investment inenhancing competitive capacity to bring the highest effect to VCB.

28p nguyenthiminh32 12-07-2014 111 5   Download

The thesis aims to identify how students interest in learning speaking. The thesis, in ddition, aims to find out the effect of using role-play in speaking classes. Also, it is intended to find out difficulties from using role-play activities so that the researcher can suggest some solutions to these difficulties.

69p nickluvik123 03-07-2014 137 15   Download

This paper investigates the relationship between non-farm employment and household income in Hanoi's periurban areas. The findings showed that the vast majority of the sample households participate in non-farm activities and income from these sources mainly contributes to total household income. Factors affecting household income were examined using multiple regression models and the findings confirm the important role of non-farm employment in improving household income.

9p banhukute 18-06-2013 58 4   Download

This q u e s t i o n is particularly important for the construction of cooperative dialo 9 systems, since, i n many a p p l i cations, no e x p l i c i t knowledge about the dialog goals of the questioner is available at the outset. If a,system is nevertheless expected to 'over-answer , i.e. to volunteer information that has n o t s p e c i f i c a l l y been r e q u e s t e d , it must command a s e t...

8p buncha_1 08-05-2013 41 1   Download

Connective tissue growth factor/hypertrophic chondrocyte specific gene product 24 (CTGF/Hcs24) promotes proliferation and differentiation of chondrocytes in culture. We investigated the roles of two major types of mitogen activated protein kinase (MAPK) in the promotion of proliferation and differentiation by CTGF/Hcs24. Here we report the effects of the MAPKK/MEK 1/2 inhibitor, PD098059, and p38 MAPK inhibitor, SB203580, in a human chondrosarcoma-derived chondrocytic cell line (HCS-2/8) and rabbit growth cartilage (RGC) cells treated with CTGF/ Hcs24....

8p system191 01-06-2013 38 2   Download

Calcitonin (Ct) is a 32-residue peptide hormone that is mainly known for its hypocalcemic effect and the inhibition of bone resorption. Our previous studies have led to potent, side-chain lactam-bridged human Ct (hCt) analogues [Kapurniotu, A. Kayed, R., Taylor, J.W. & Voelter W. (1999) Eur. J. Biochem.265, 606±618; Kapurniotu, A. & Taylor, J.W. (1995)J. Med. Chem.38, 836±847]. We have hypothesized that a possibly type Ibturn/bsheet confor-mation in the region 17±21 may play an important role in hCt bioactivity. ...

12p research12 01-06-2013 41 4   Download

A proper treatment of syntax and semantics in machine translation is introduced and discussed from the empirical viewpoint. For EnglishJapanese machine translation, the syntax directed approach is effective where the Heuristic Parsing Model (HPM) and the Syntactic Role System play important roles. For Japanese-English translation, the semantics directed approach is powerful where the Conceptual Dependency Diagram (CDD) and the Augmented Case Marker System (which is a kind of Semantic Role System) play essential roles.

8p bungio_1 03-05-2013 47 3   Download

In recent years,a great deal of evidence has been collected which gives substantially increased insight into the nature of human speech perception. It is the author's belief that such data can be effectively used to infer much of the structure of a practical speech recognition system. This paper details a new view of the role of structural constraints within the several structural domains (e.g. articulation, phonetics, phonology, syntax, semantics) that must be utilized to infer the desired percept. ...

2p bungio_1 03-05-2013 41 1   Download

The cAMP-dependent protein kinase (PKA) signaling pathway plays a major role in a number of pathophysio-logical conditions. However, there have been conflicting evidences regarding the action of cAMP/PKA on nuclear factor-jB(NF-jB). Inthis study,wehaveexplored the effect of cAMP/PKA on NF-jBactivity and determined its molecular mechanism. PKA activating agents or expression of thecatalyticsubunitofPKA(PKAc) inhibitedtheNF-jB-dependent reporter gene expression induced by tumor nec-rosis factora(TNFa). ...

7p research12 23-04-2013 30 2   Download

The interactions between photosystem I and five charge mutants of plastocyanin from the cyanobacteriumPhormi-dium laminosumwere investigatedin vitro. The dependence of the overall rate constant of reaction,k2, on ionic strength was investigated using laser flash photolysis. The rate con-stant of the wild-type reaction increased with ionic strength, indicating repulsion between the reaction partners. Remov-inganegativechargeonplastocyanin(D44A) acceleratedthe reactionandmade it independentof ionic strength; removing a positive charge adjacent to D44 (K53A) had little effect....

10p tumor12 22-04-2013 35 2   Download

The presence of extraN- andC- terminal residues can play a major role in the stability, solubility and yield of recombi-nant proteins. Pfg27 is a 27Ksoluble protein that is essential for sexual development in Plasmodium falciparum.It was over-expressed using the pMAL-p2 vector as a fusion pro-teinwith themaltosebindingprotein. Sixdifferent constructs were made and each of the fusion proteins were expressed and purified.

5p tumor12 22-04-2013 33 1   Download

Glycogen synthase kinase 3 (GSK3) is inactivated by insulin and lithium and, like insulin, Li also activates glycogen synthase (GS)viainhibition of GSK3. Li also mimics insu-lin’s ability to stimulate glucose transport (GT), an obser-vation that has led to the suggestion that GSK3 may coordinate hormonal increases in GT and glycogen synthe-sis. Here we have used Li and SB-415286, a selective GSK3 inhibitor, to establish the importance of GSK3 in the hor-monal activation of GT in terms of its effect on GS in L6 myotubes and3T3-L1adipocytes. ...

10p tumor12 20-04-2013 28 2   Download

Intravenous iron, used for the treatment of anemia in chronic renal failure andother diseases, represents a possible source of free iron in tissue cells, particularly in the liver. In this study we examined the effect of different sources of intravenous iron (IVI) on the labile iron pool (LIP) which represents the nonferritin-bound, redox-active iron that is implicated in oxidative stress and cell injury. Furthermore, we examined the role of the LIP for the synthesis of ferritin.

8p tumor12 20-04-2013 44 2   Download

We investigate various contextual effects on text interpretation, and account for them by providing contextual constraints in a logical theory of text interpretation. On the basis of the way these constraints interact with the other knowledge sources, we draw some general conclusions about the role of domain-specific information, top-down and bottom-up discourse information flow, and the usefulness of formalisation in discourse theory.

8p bunmoc_1 20-04-2013 29 1   Download

Word alignment plays a crucial role in statistical machine translation. Word-aligned corpora have been found to be an excellent source of translation-related knowledge. We present a statistical model for computing the probability of an alignment given a sentence pair. This model allows easy integration of context-specific features. Our experiments show that this model can be an effective tool for improving an existing word alignment.

8p bunbo_1 17-04-2013 37 1   Download

We examine the effect of contextual and acoustic cues in the disambiguation of three discourse-pragmatic functions of the word okay. Results of a perception study show that contextual cues are stronger predictors of discourse function than acoustic cues. However, acoustic features capturing the pitch excursion at the right edge of okay feature prominently in disambiguation, whether other contextual cues are present or not.

8p hongvang_1 16-04-2013 49 4   Download

A hybrid convolution tree kernel is proposed in this paper to effectively model syntactic structures for semantic role labeling (SRL). The hybrid kernel consists of two individual convolution kernels: a Path kernel, which captures predicateargument link features, and a Constituent Structure kernel, which captures the syntactic structure features of arguments. Evaluation on the datasets of CoNLL2005 SRL shared task shows that the novel hybrid convolution tree kernel outperforms the previous tree kernels.

8p hongvang_1 16-04-2013 49 1   Download

This article describes a robust semantic parser that uses a broad knowledge base created by interconnecting three major resources: FrameNet, VerbNet and PropBank. The FrameNet corpus contains the examples annotated with semantic roles whereas the VerbNet lexicon provides the knowledge about the syntactic behavior of the verbs. We connect VerbNet and FrameNet by mapping the FrameNet frames to the VerbNet Intersective Levin classes.

8p hongvang_1 16-04-2013 35 1   Download

Dipeptidyl peptidase IV (DP IV, CD26) plays an essential role in the activation and proliferation of lymphocytes, which is shown by the immunosuppressive effects of syn-thetic DP IV inhibitors. Similarly, both human immuno-deficiency virus-1 (HIV-1) Tat protein and the N-terminal peptide Tat(1–9) inhibit DP IV activity and T cell prolifer-ation. Therefore, the N-terminal amino acid sequence of HIV-1 Tat is important for the inhibition of DP IV.

10p fptmusic 16-04-2013 29 2   Download