Materials Literature
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The paper analyzes surface structure of scale of cashmere and wool.It adopts a series of methods such as cyclostyle substitution,thinning,short line filtration,boundary searching,figure tracking,broken dot analysis,inflexion analysis,broken dot linking and so on.It brings forward some relate index such as inner and ou…
新規セルロース誘導体であるカーボネート化セルロースの合成を検討した. トリアセチルセルロース (CTA) を原料として, ジフェニルカーボネート (DPC) をカーボネート試薬兼反応溶媒とするエステル交換反応によるフェニルカーボネート基の導入を行ったところ, その置換度は2付近にとどまった. そこで高置換度カーボネート化誘導体を得る目的で, 未修飾セルロースを原料として, ジメチルアセトアミドー塩化リチウム均一溶媒系においてセルロースヒドロキシル基へのフェニルカーボネート基の導入を検討した. その結果, 初めにカーボネート試薬としてDPCを用いた場合, 反応溶液はゲル化し, 生成物は各種有機溶媒に不溶となった. 次にカーボネート試…
Na1-x Li x NbO3 (0 x 0.006) and Na1—x K x NbO3 (0 x 0.10) solid solution crystals have been grown from the flux. Dielectric, X-ray and optical studies of the crystals revealed the presence of new phase transitions in the temperature range from—50C to 200C. The results obtained imply the necessity of substantial correc…
A systematic spectroscopic study of single ZnWO 4 :Fe crystals with different iron concentrations has been performed under excitation by ultraviolet light, by synchrotron radiation or under photostimulation by near-infrared light. The luminescence of Fe 3+ -related centres has been studied. It is shown that iron centr…
In the first part of this paper [Wild and von Collani, Economic Quality Control 17: 113-122, 2002] the Bruceton method and the underlying model assumptions for assessing the sensitivity of explosives were critically examined resulting in the recommendation not to use the Bruceton method. The second part describes an a…
Magnesium housings, which are lightweight, strong, and have high heat radiation characteristics, are in widespread use for portable personal computers and similar devices. Another characteristic of magnesium alloy is that it is a metal that can be melted for recycling. There are two ways of recycling magnesium alloy h…
The requirements for future ferroelectric non-volatile memories (FRAM) include lower operating voltages, higher densities and tighter design rules. In order to achieve these requirements the key component of the FRAM device, viz., the PbZr x Ti 1 m x O 3 (PZT) thin film capacitor must be scaled dimensionally to obtain…
Epoxidation of olefins was successfully achieved using molecular oxygen in the presence of an aldehyde and a catalytic amount of CuCl2 at room temperature. Hexanal was found to be a particularly good reducing agent for the CuCl2-catalyzed epoxidation. A good correlation was observed between the reactivity and the calc…
Quaternary and ternary interdiffusion experiments of 7000 aluminum alloys have been performed at 725 and 755 K. The concentration profiles indicate that the diffusion distance of Cu is shorter than those of Zn and Mg in the solid solutions. The direct interdiffusion coefficients \\ ildeDZnZnAl, \\ ildeDMgMgAl are posi…
The purpose of this paper is to present a new constitutive equation (CE) based on the experimental results obtained by the author on different carbon steels and those available in the open literature on carbon steels, niobium ant titanium at different temperatures (−200 to 300 °C) and strain rates (10−4 to 5000 s−1),…
Extending Squeeze Lifetimes Using Miscible Displacement I.R. Collins; I.R. Collins BP Exploration Operating Company Search for other works by this author on: This Site Google Scholar J.A. Hewartson J.A. Hewartson BP Exploration Operating Company Search for other works by this author on: This Site Google Scholar Paper…
Contrary to natural fragmentation, controlled fragmentation offers the possibility to adapt fragment parameters like size and mass to the performance requirements in a very flexible way. Known mechanisms like grooves inside the casing, weaken the structure. This is, however, excluded for applications with high acceler…
In this study, two materials treated with a flame retardant were examined for their fire resistance. The first, MDF (medium density fiberboard) was overlaid by an oak sliced veneer, which was either treated by soaking in a 6wt.% solution of flame retardant chemicals (pentabromine-chlorinated paraffin) or non-treated a…
Influence of B on the selective surface oxidation behavior of Mn during recrystallization annealing was investigated by glow discharged spectroscopy, secondary electron microscopy and auger electron spectroscopy, on the 0.4mass% Mn added ultra low carbon steel.It is well known that both Mn and B are segregated on the…
SUMMARYZinc electrodeposits are widely used to protect iron and steel from corrosion. Zinc coatings are presently obtained from chloride and non-cyanide alkaline baths. Environmental corrosion along with the electrolyte's sensitivity towards metallic impurities limit the use of the chloride electrolyte. The use of bri…
A core of concentric nanotubes could oscillate at gigahertz frequencies–faster than any other mechanical oscillator.
As the dimensions of semiconducting devices continue to shrink, microelectronic devices are becoming increasingly sensitive to micro-contamination on wafer surfaces. This investigation analyzes the particulate morphology, elemental composition and the particle sizes of wafer contaminants in the lithographic process ar…
The associations of the water-soluble cationic copper(II)-5,10,15,20-meso-tetrakis(4-N-methylpyridyl) porphyrin (CuP) with d(pT)9 oligothymidylate and its building blocks deoxythymidine (dT) and deoxythymidine 5'-monophosphate (dTMP) were investigated by spectrophotometric titration [absorption, nanosecond transient r…
The temperature dependences of the nuclear-electric-quadrupole frequency ωQ of 117In and 111Cd doped in ferroelectrics LiTaO3, Li1−xInx⁄3TaO3 with x=0.2, and Li1−xCdx⁄2TaO3 with x=0.167, measured by the perturbed-angular-correlation technique, indicate that In behaves like Li; further, in a certain temperature range a…
Differences of high energy-ion induced microstructure of bcc δ-ferrite and fcc austenite matrix, and the effects of δ-ferrite on the Vickers micro-hardness (Hv) after irradiation were investigated for Type 304 stainless steel weldments containing two different δ-ferrite contents: ferrite number (FN) 5.5 and 8.5, respe…