Materials Literature
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为降低成本，采用传统电子陶瓷工艺制备了（Na0．5K0．5-xLix）NbO3（x=0．057-0．066）无铅压电陶瓷。Li取代K可以明显提高样品的居里温度（tc），x=0．066时样品的tc高达510℃，比纯（Na0．5K0.5）NbO3陶瓷高70℃左右。x=0．064时样品的d33高达212pC／N，kp为45．7％。x=0．063—0．066时样品的tanδ均低于0．020。特别是，x=0．066的样品经450℃退火24h，d33仍高达125pC／N。实验表明（Na0．500K0．434Li0．066）NbO3是高性能的高温无铅压电陶瓷。
After attention a proses of snack fryng, that this is a reason of scorched and made snack did,t growthis because of the temperature not stabil in sand because the last equipment after first fryng stop so the sand made not and if used can made snack scorched, so I have idea to fryng used” engine ” so the result of temp…
The present paper reports about a study on the reactivity of Keggin-type P/Mo/V polyoxometalates (POMs) in the oxidation of cyclohexanone to adipic acid with oxygen, in order to find out how the reactivity performance is affected by the POM composition and by reaction conditions. Keggin-type POMs were prepared accordi…
As shown previously, the conventional testing procedure for simulating long-term migration from the gaskets of metal closures into oily foods does not adequately reflect reality. It appears to be impossible to accelerate migration to the extent that the situation at the end of the shelf life of a product can be antici…
Polymer matrix-ZnO microcomposites were prepared in different filler concentrations. The electrical relaxation dynamics of all samples was examined by means of broadband dielectric spectroscopy (BDS) over a wide temperature range. Two relaxation modes (namely β and γ), observed in the low temperature region, are attri…
RAFT polymerization of poly(ethylene glycol) methyl ether methacrylate (PEGMA, 1100 g mol⁻¹) was first performed using cyanoisopropyl dithiobenzoate (CPDB). The control of PEGMA homopolymerization, carried out in THF ([PEGMA] = 40 wt %) at 65 °C (reflux) using 2,2'-Azobis(isobutyronitrile) (AIBN) as initiator, was sho…
Poly(e-caprolactone) (PCL) with a pendent coumarin group was prepared by solution polycondensation from 7-(3,5-dicarboxyphenyl) carbonylmethoxycoumarin dichloride and α, ω-dihydroxy terminated poly(e-caprolactone) with molecular weights of 1250, 3000, and 10,000 g/mol. These photosensitive polymers underwent a rapid r…
Protein adsorption at solid surfaces plays a key role in many natural processes and has therefore promoted a widespread interest in many research areas. Despite considerable progress in this field there are still widely differing and even contradictive opinions on how to explain the phenomena that are frequently obser…
Los polielectrolitos conjugados han adquirido gran importancia en las ultimas decadas gracias a sus potenciales aplicaciones en el campo de los diodos emisores de luz (LEDs), celdas fotovoltaicas, o como sondas quimicas y biologicas. En gran parte de estas aplicaciones es necesario que estos polimeros tengan una buena…
Because the molecular Hamiltonian contains only one-body and two-body operators, the two-electron reduced density matrix contains all the information needed to evaluate the energy, as well as most of the other properties of interest to chemists and molecular physicists. A straightforward minimization of the energy is…
A study was carried out to examine the ratio of diatom to dinoflagellate in two estuaries as sampling areas and its potential application as an early indicator for eutrophication. Water samples were collected from the estuaries of Samariang Batu and Santubong fortnightly for 10 samplings using Van dorn sampler. Cell e…
The novel trifunctional initiator, 1-(4-methyleneoxy-2,2,6,6-tetramethylpip-eridinoxyl)-3,5-bi(bromomethyl)-2,4,6-trimethylbenzene (TEMPO-2Br), was successfully synthesized and used to prepare the miktoarm star amphiphilic poly(styrene)-(poly(N-isopropylacrylamide))₂ (PS(PNIPAAM)₂) via combination of atom transfer rad…
It is suggested that the keratinolytic activity of proteases are associated with the degrading activity of the abnormal type prion protein (PrPSc). We tried to analyze the keratinolytic properties of the PrPSc- degrading enzyme E77. E77 showed a much greater keratinolytic activity than proteinase K and subtilisin. The…
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Tone injection scheme has been known as one of peak to average power ratio (PAPR) reduction methods deployable to multi-carrier system like orthogonal frequency division multiplexing (OFDM). The basic idea in tone injection scheme is to enforce the constellation size larger so that each of original constellation point…
The maleic anhydride-grafted multiwalled carbon nanotubes (MWCNTs-g-MA) have been introduced into polypropylene/ethylene-co-vinyl acetate (PP/EVA) blend. To clearly describe the effects of MWCNTs-g-MA on the morphology and mechanical properties of PP/EVA blends, the selective distribution of MWCNTs-g-MA in the blends…
Com o objectivo de conhecer o processo da co-incineração, foram realizadas visitas ao sistema integrado de tratamento e eliminação de resíduos, sA (sisAV), na chamusca, e à cimpor, em souselas. pode concluir-se que o tratamento das emissões gasosas, principal questão conflituosa associada à co-incineração, não difere…
This paper presents a non-linear analytical model for analyzing composite beams under transverse bending load. The model reproduces the elements responsible for the relative slip between the layers with an elasto-plastic strain-softening interlayer. Further than the slip, the model predicts load induced stress and ult…
Failure of ship hulls may be a result of a combination of factors. Residual stress caused by welding of the stiffeners on to the steel plates is one of the contributing factors to the failure. This analysis was completed for a more in-depth look at the residual stress distribution found at a typical weld-stiffener con…
The B206 alloy (up to 5 wt% Cu) is the strongest aluminum foundry alloy in current use. B206 alloy can be used in a number of automotive applications, e.g. suspension knuckles and vehicle control arms, to reduce vehicle weight. Elimination of hot tearing has reawakened the interest in the 206 alloy family. However, th…