Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Decahedral multiply-twinned particles of Si, 60–80 nm in size, prepared by a gas evaporation method are studied by a high resolution electron microscope. A mismatch arising in packing five tetrahedra is accommodated by deforming plastically one of the tetrahedra by introducing a small angle grain boundary. A core regi…
It was recently reported (C-W. Chen et al., FEBS Lett. 168, 70 (1984)) that water solutions of Mn3+ (TPPS4) have a surprisingly high relaxivity at 20 MHz and 37 degrees C, greater than most Mn2+ complexes including the hexaaquoion. Because Mn3+ (TPPS4) is highly stable, and porphyrins in general are tumor-seeking, we…
SUMMARY Stability changes during ageing (sterile) or incubation (non‐sterile) of both natural field aggregates and remoulded aggregates from five soils were studied for periods up to 30 days. Growth of fungal hyphae, estimated by ergosterol measurement, corresponded to temporary stability increases in both types of ag…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMathematical modeling of biofilm on activated carbonH. Ted. Chang and Bruce E. RittmannCite this: Environ. Sci. Technol. 1987, 21, 3, 273–280Publication Date (Print):March 1, 1987Publication History Published online1 May 2002Published inissue 1 March 1987https://pubs.acs.org…
Magnetic resonance imaging provides a method of visualizing multiple sclerosis plaques, but the age and activity of these plaques cannot be determined with routine magnetic resonance images. Gadolinium DTPA is a paramagnetic contrast agent that does not cross an intact blood-brain barrier. We studied 16 patients with…
Fine crystals of Si having spherical shapes of less than 200 nm, as well as hybrid particles of Si and β-SiC were prepared by a gas evaporation method using an arc discharge as the heat source. Si particles always contain stacking faults and twins which are categorized as growth faults. All the planar faults in a part…
Abstract The crystal of a new ambient-pressure superconductor, κ-(BEDT-TTF)2I3 belongs to the monoclinic system with space group P21/c and a=16.387, b=8.466, c=12.832 Å and β=108.56°. The 2-dimensional(2D) metal sheets composed of paired BEDT-TTF molecules and the I3 anion sheets are arranged alternately along the a.…
Recent developments in the theory of phase transitions in KH2PO4-type crystals are reviewed together with some relevant experiments. The nature of the isotope effect in the static and dynamic properties of these systems on replacing hydrogen by deuterium is discussed. Expressions for the static and dynamic properties…
The cure reactions, chemical structure, and network topography of diaminodiphenyl sulfone (DDS)-cured tetraglycidyl 4,4′diaminodiphenyl methane (TGDDM) epoxies are reported. Systematic Fourier transform infrared (FTIR) spectroscopy studies of the cure and degradation reactions of TGDDM-DDS epoxies in the 100–300°C tem…
We present a model for solid-state silicide nucleation at the interface of a thin metal film and a silicon substrate, starting with the assumption that compound nucleation in these systems is a kinetically controlled process. We consider the work being done on other systems, such as dendrite nucleation and growth, and…
Particles of hydrogen storage alloy was microencapsulated with porous thin film (about one micron thickness) of copper. The microencapsulated alloy powder was used as an anode material in a sealed nickel/metal hydride battery. The battery characteristics were compared with those of a battery with a bare (noncoated) al…
Alumina‐zirconia composites were fabricated by isostatic pressing and sintering of powder mixtures in such a way that bar‐shaped specimens consisted of three layers. The outer layers contained A1 2 O 3 and unstabilized ZrO 2 while the central layer contained A1 2 O 3 and partially stabilized ZrO 2 (with 2 mol% Y 2 O 3…
Analytical expressions are derived for estimating the temperature profile along a straight-line resistor test structure due to the joule heating generated by a high current-density stress, such as is used in accelerated stress tests to characterize metallizations for electromigration. It is shown how an improved estim…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text Douglas S. Goodman, "Theory and Practice of Scanning Optical Microscopy," J. Opt. Soc. Am. A 4, 551-552 (1987) Export Citation BibTex Endnote (RIS) HTM…
一、引言 Bednorz和Muiller发现在Ba-La-Cu氧化物系统中可能存在35K的超导电性,Uchida和Takagi等人观察到Meissner效应,从而确定了该系统的超导电性的存在. 国内外几个小组在短时间内报道了他们有成效的结果. Chu等人报道了在流体静压下获得起始超导转变温度为52K的结果,Cava等人获得了接近于单相的超导相,其转变温度为36.2K,
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSize quantization in layered semiconductor colloids with tetrahedral bonding: mercury diiodideO. I. Micic, M. T. Nenadovic, M. W. Peterson, and A. J. NozikCite this: J. Phys. Chem. 1987, 91, 6, 1295–1297Publication Date (Print):March 1, 1987Publication History Published onli…
The mechanism of lattice thermal expansion in pure hexagonal cordierite prepared by glass devitrification was investigated by time‐of‐flight neutron powder diffraction at temperatures from 22° to 750°C under vacuum. Full matrix least‐squares refinement of the diffraction spectra was carried out in space group P6/mcc u…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTpH-sensitive nickel(II) hydroxide-based microelectrochemical transistorsMichael J. Natan, Daniel. Belanger, Michael K. Carpenter, and Mark S. WrightonCite this: J. Phys. Chem. 1987, 91, 7, 1834–1842Publication Date (Print):March 1, 1987Publication History Published online1 M…
Crystalline fine powders of LiAlO 2 can be prepared by hydrolysis of metal alkoxides for application to the breeder blanket in nuclear fusion. The precipitates were fine crystalline particles of β‐LiAlO 2 of ∼0.1‐μm size under controlled conditions. The transformation from β‐ to γ‐phase was confirmed at temperatures b…
The reproducibility of median-time-to-failure (t50) measurements was determined in an interlaboratory experiment in which 11 laboratories and a reference laboratory took part. Each laboratory used a method of its choosing to test equivalent samples under the same conditions of current density and oven temperature. The…