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。
Abstract Ultrasound can be used in chemistry to increase both reaction rates and yields of products. Most effects of ultrasound on chemical reactions are due to cavitation: the formation and collapse of small bubbles in the solvent. In this review, we first outline the physical background of cavitation, and discuss it…
A new type of self-assembled multilayer film, a molecular deposition (MD) film composed of meso-tetra(4-sulfenyl)porphyrin (tppS4) or copper phthalocyaninetetrasulfonic acid, tetrasodium salt (CuTsPc), alternating with a bipolar pyridine salt has been achieved and its structure studied in detail.
The term “Pattern Theory” was introduced by Ulf Grenander in the 70s as a name for a field of applied mathematics which gave a theoretical setting for a large number of related ideas, techniques and results from fields such as computer vision, speech recognition, image and acoustic signal processing, pattern recogniti…
The complete-moving-hysteresis (CMH) model computes both the reversible and the irreversible components of the magnetization and the relationship between these components. An important question associated with a given model is the corresponding identification strategy which provides a method to experimentally obtain t…
Acidic matrix macromolecules, present in many mineralized tissues, including those of vertebrates, are thought to be involved in controlling crystal formation. Little, however, is known about their in vivo functions, particularly in relation to calcium-phosphate-containing crystals. The manner in which a variety of sy…
Treatment of fluorinated ethylene propylene (FEP) and polytetrafluoroethylene (PTFE) in ammonia plasmas produced surfaces with very high wettability by water, but on storage in air at ambient temperature, the air/water contact angles increased markedly. The evolution of the surface composition and topography was studi…
Expression of a cold-regulated protein with a molecular mass of 85 kDa (COR85) is closely associated with the development of freezing tolerance during cold-acclimation of spinach [Kazuoka and Oeda (1992) Plant Cell Physiol. 33: 1107]. In the present study, COR85 was purified from the leaves of cold-acclimated spinach…
The Clostridium cellulovorans cellulosome is comprised of a large, nonenzymatic scaffolding protein called the cellulose binding protein A (CbpA) and a number of endoglucanases/xylanases. The CbpA contains several functional domains, including a signal peptide, a cellulose binding domain (CBD), a hydrophilic domain (H…
The discovery of a new magnetic field induced phase transition between the space-modulated spin structure (SMSS) and the homogeneous antiferromagnetic state (HAFS) is reported. This phase transition is accompanied by large magnetoelectric (ME) anomalies. It is well known that BiFeO, shows the ferroelectric ordering (T…
Sulfonated polyaniline (SPAN) was synthesized by sulfonation of polyaniline (PANI) base with fuming sulfuric acid. Thin films were cast from polymer solutions in basic media. The polymer films were characterized by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, ultraviolet–visi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymer-like lecithin reverse micelles. 1. A light scattering studyP. Schurtenberger and Carolina CavacoCite this: Langmuir 1994, 10, 1, 100–108Publication Date (Print):January 1, 1994Publication History Published online1 May 2002Published inissue 1 January 1994https://doi.o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyrotaxanes based on polyurethane backbones and crown ether cyclics. 1. SynthesisY. X. Shen, D. Xie, and H. W. GibsonCite this: J. Am. Chem. Soc. 1994, 116, 2, 537–548Publication Date (Print):January 1, 1994Publication History Published online1 May 2002Published inissue 1…
This paper presents the magneto-structural study on orthoferrite TmFeO3 and Sm substituted TmFeO3 across spin reorientation transition (SRT) temperature. A strong change in magnetic anisotropy due to the substitution of the Sm3+was observed, which is reflected as a change in spin reorientation transition (SRT) tempera…
Large 1H chemical shifts are suggestive of protonic superacidity of sulfated zirconia catalysts, this property being related to the structure of surface sulfate species.
Nitrogen adsorption isotherms have been measured on a series of aluminosilicate and titanosilicate MCM-41 Molecular sieves, whose mean pore radius varied from ca. 0.9 to ca. 2 nm. By means of comparison plots the nature of the adsorption on these materials was found to depend strongly on their pore size. With pores of…
The adsorption of low-molecular-weight polyacrylic acid (Mr= 2000) on zirconia has been studied as a function of pH. In this study, an atomic force microscope (AFM) was used to monitor directly the changes in polymer conformation at the solid/water interface. Force–distance profiles were obtained at AFM scan rates equ…
Evidence is presented on the harmful impact of a diatom (Thalassiosira rotula) on the reproductive biology of the copepod Calanus helgolan&cus. When adult females were fed the &atom, both total egg production and hatching success were significantly lower than with the dinoflagellate Prorocentrum minimum. Embryonic dev…
The synthesis and characterisation of the dodecanuclear nickel complex, [Ni12(O2CMe)12(chp)12(H2O)6(THF)6](where chp = the anion of 6-chloro-2-pyridone) is described; structure determination shows formation of a metallocycle, while magnetic studies indicate ferromagnetic coupling between the nickel(II) ions within the…
The formation of photostimulated luminescence (PSL) centers in BaFBr:Eu 2+ single-crystal phosphors is studied in the 5–9 eV vacuum ultraviolet region. The centers are efficiently formed by the Eu 2+ photoionization absorption at 6.6 eV. The PSL excitation spectrum after the photoionization excitation is almost the sa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase behavior of blends of linear and branched polyethylenes in the molten and solid states by small-angle neutron scatteringR. G. Alamo, J. D. Londono, L. Mandelkern, F. C. Stehling, and G. D. WignallCite this: Macromolecules 1994, 27, 2, 411–417Publication Date (Print):Ja…