Báo cáo vật lý: "The Kinetics and Mechanism of the Core-shell Styrene-butyl Acrylate Polymerisation" pdf

... experimentally and estimates of the emulsion polymerisation mechanism of synthesis for the obtained core and shell. The determination of the polymerisation reaction kinetics of the styrene core and butyl ... is the polymerisation rate of the styrene core, and k is the rate reaction constant in the formation of the styrene core. 3.4 Mechanism of Reaction in the Formation of the Styrene Core The ... theory in their quantitative experiment, and the Harkins5 micellar theory is the basis of the theory for emulsion polymerisation kinetics. Smith and Ewart6 found Core-shell Styrene-butyl Acrylate...

Báo cáo vật lý: "Mechanochemical Synthesis and Characterisation of Bismuth-Niobium Oxide Ion Conductors" ppsx

... 800oC, the diffusion of oxygen ions through the entire thickness of the electrode was seen in the collapse of the spike into a semicircular arc [Fig. 4(c)], supporting the idea that the conducting ... 7 shows the comparison of the Arrhenius plots of Bi3NbO7 synthesized by the solid-state and mechanochemical methods. Based on the results, there is no significant difference in the conductivities ... between the two samples synthesized via the two different methods. The slopes of the plots are determined to be 0.79 eV for the compound prepared via the mechanochemical method and 0.83 eV for the...

Báo cáo vật lý: "Selective Oxygenation and Plant-Growth Regulatory Activity of Sesquiterpene Lactones" pot

... 5 (24%) and 6 (29%) that were identified by comparison with the mp, IR and NMR of the authentic samples. Compound 9 showed IR bands at 1780 cm–1 due to the presence of δ-lactone, bands at ... 157oC) and 6 (mp 144oC) were identified as isozaluzanin-C, telekin, and isotelekin. The IR bands [in chloroform (CHCl3)] of compound 3 were obtained at 3440, 1775, 1670, 1640 and 890 cm–1 and ... one considers the combined benefits of economics, selectivity and safety, UHP emerges as one of the best sources of oxygen atoms for a variety of organic oxygenation reactions. The compounds...

Báo cáo vật lý: "Thermo-mechanical and Light Transmittance of Silica Diffusant Filled Epoxy Composites" docx

... that the DCN/SS50 composite possesses the lowest CTE value. The Tonset and Tpeak of the DCN were not influenced by the addition of diffusants. On the other hand, the ΔH and Tg of the ... Tg as the content of the SS50 diffusant increases. Table 3 shows the Tg of the DCN and of the various DCN/SS50 composites. The Tg for the DCN/SS50 composites slightly decreased as the percentage ... Tpeak, Tg and ΔH, of the DCN and the various DCN/SS composites. It can be seen that the Tonset of the epoxy blends increased with the addition of the silica diffusant, albeit the increment...

Báo cáo vật lý: "Synthesis, Characterisation and Catalytic Performance of Porous Nafion Resin/Silica Nanocomposites for Esterification of Lauric Acid and Methanol" potx

... external surface of the resin where shape selectivity does not exist.16 On the other hand, the reaction might occur on the internal sites of the NR/S-20 structure and therefore control the shape ... 3.4 Influence of the Hydrocarbon Chain Length on the Acid The influence of the hydrocarbon chain length on the diffusion rate of the acid in the catalyst was studied. The results present ... that the diffusion of lauric acid was easier with the gel phase of the resin in the catalyst due to the chain length effect and its facilitation of adsorption on the strong protonic sites. Therefore,...

Báo cáo vật lý: "LATTICE DYNAMICS AND NORMAL COORDINATE ANALYSIS OF HTSC Tl2Ba2Cu1O6" potx

... Analysis of the Zero Wave Vector Vibrations of Tl2Ba2Cu1O6 The study of lattice vibrations and the free carriers are important for the understanding of the physical nature of high ... label the ions and r is their separation. The parameters aij and bij are the pair potentials and the parameters Y and K determine the electronic polarizabilities. The parameters Z, Y and ... Tl2Ba2Cu1O6 and the numbering of the atoms are shown in Figure 1. The 11 atoms of the unit cell yield a total of 22 optical vibrational modes. All the above calculations are made at q = 0. One of A2u...

Tài liệu Báo cáo khoa học: Identiﬁcation and characterization of the transcription factors involved in T-cell development, t-bet, stat6 and foxp3, within the zebraﬁsh, Danio rerio docx

... CD4+CD25+Foxp3+Tregor whetherthey induce the production of these cytokines fromanother population of cells [20].To date, our knowledge about the different types of Th and Tregresponses relates ... tissue of mouse and spleen and thymus of human and mouse [11,37]. Foxp3 is also highly expressed inlymphoid organs, such as the thymus and spleen [49], and its expression within a variety of other ... conservation of syntenybetween the human and zebraﬁsh genomes where the t-bet and foxp3 genes are found. In contrast, there wasno synteny between the human and zebraﬁsh regionscontaining the stat6...

Tài liệu Báo cáo khoa học: SREBPs: physiology and pathophysiology of the SREBP family ppt

... particular, p21 is a direct target of SREBP [20]. The role of SREBP-1a in the regulation of cell growth and the cell cycle might be biphasic and complex, and needs to be further investigated.SREBP is ... resistance [48]. The exact roles of SREBP-1c ⁄ADD1 are not yet fully deﬁned.SREBP and parasympathetic functionin heartParasympathetic stimulation of the heart involvesactivation of GIRK1 ⁄ 4, ... inhibit lipogenesis and lowertissue and plasma triglyceride levels through inhibition of SREBP-1c. The molecular mechanisms by whichPUFAs inhibit SREBP-1c are multiple and complex, and still under...

Tài liệu Báo cáo khoa học: Topology, tinkering and evolution of the human transcription factor network doc

... compares the studied network withrandomized versions of it with the same size and degree dis-tribution. The so-called Z-score quantiﬁes the differencebetween the studied network and an ensemble of ... analysis of the topological modules of the Fig. 3(labelled A–G) shows that they include structural and ⁄or functional features. Table 3 summarizes the main structural and functional features of thesegroups. ... functions, and topologi-cal features retain functionality and phylogeny. How-ever, the nature of the connections between thesefactors needs to be understood at the level of the pro-tein domain. The...

Tài liệu Báo cáo khoa học: Antifungal effects and mechanism of action of viscotoxin A3 docx

... >, of (––) DPH and (ÆÆÆÆ) TMA-DPH incorporated into spores of F. solani in the absence of VtA3(n) and in the presence of 1.5 lM VtA3(s )and3 lM VtA3(n). Insert in (B) shows the evolution of ... changein ﬂuidity of fungal membranes may be explained by the insertion of the protein and modulation of the lat-eral pressure, as has been reported for other proteins[41]. Moreover, these results ... induce the genera-tion of H2O2in spores [9,15–18].In this work we have gained more information on the cellular targets and the mechanism of action of vis-cotoxins, by examining the interaction...

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