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。
Two mismatches, G.G and I.I, have been incorporated at the central position of 5'd-(GCCACXAGCTC).d(GAGCTXGTGGC) in order to carry out NMR and molecular dynamics studies. These duplexes constitute the sequence 29-39 of the K-ras gene coding for the glycine 12, a hot spot for mutation. The NMR spectra show that the dupl…
The structural elucidation of seven related oxypregnane-oligoglycosides stephanosides K (1), L (2), M (3), N (4), O (5), P (6), and Q (7) from the fresh stem of Stephanotis lutchuensis var. japonica (Asclepiadaceae) was achieved through on a detailed study of their high-field 1H- and 13C-NMR spectra. The results show…
The strengths of the $^{5}$${\mathit{D}}_{0}$${\mathrm{\ensuremath{-}}}^{7}$${\mathit{F}}_{\mathit{J}}$ (J=0,2,4) optical transitions of the ${\mathrm{Sm}}^{2+}$ ion in solids, which are due to the forced electric dipole transition, are analyzed by taking into account not only the Judd-Ofelt mechanism but also the exc…
Article Preparation of Dissolving Pulp from Sugar Cane Bagasse, and its Acetylation Under Homogeneous Solution Condition was published on January 1, 1996 in the journal Holzforschung (volume 50, issue 3).
New determinations of quantitative forward rate constants for reactions of titanium monomer cation with C 2 H 6, C 3 H 8, H 2 O, NH 3, and O 2 are accomplished using a high-pressure (multicollision) flow tube reactor. These experiments were prompted by our observation of conflicting reports in the literature. The reac…
Thermograms of fine, medium and coarse fibres prepared by cutting, milling and freezegrinding at 5°, 20° and 50°C/ min heating rates were compared. Scanning electron microscopy revealed that fibre ends prepared by the three methods were distinctly different from each other and, in addition, the mean length of the fibr…
The Fresnel diffraction of periodic objects at rational fractions of the Talbot distance is described in terms of the Wigner distribution function (WDF). The analysis provides a heuristic model for understanding the formation of the diffraction patterns as well as for evaluating the complex amplitude at any fractional…
First-principle electronic structure calculations are used to describe the magneto-optical properties of MnBiAl alloys as a function of the Al concentration. The calculated Kerr rotation and ellipticity are in good agreement with the experimental data for MnBi. Due to lack of good structural information, the magneto-o…
The compound tetrakis( tert -butylammonium)- cyclo -tetrametavanadate(V), the first oxovanadate salt isolated from aqueous solution which contains a discrete unprotonated [V 4 O 12 ] 4 - anion, undergoes an irreversible, reconstructive, continuous, and heterogeneous phase transition in the solid state by means of a nu…
Single crystal X-ray and neutron diffraction is essential for determining occupancies, positional as well as static and dynamic displacement parameters in crystalline matter by measuring Bragg, satellite or diffuse reflections. In our contribution a new low-temperature high pressure cell for neutron single crystal dif…
Several tellurometalates of the general formula [MTe(7)](n)()(-) (n = 2, 3) have been isolated as salts of organic cations by reaction of suitable metal sources with polytelluride solutions in DMF. The [HgTe(7)](2)(-) anion has the same structure in both the NEt(4)(+) and the PPh(4)(+) salts except for a minor change…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTRemoval of Acetal, Silyl, and 4,4'-Dimethoxytrityl Protecting Groups from Hydroxyl Functions of Carbohydrates and Nucleosides with Clay in Aqueous MethanolJun-ichi Asakura, Morris J. Robins, Yukihiro Asaka, and Tong Hei KimView Author Information Departments of Biochemistry and…
Accelerating irradiation growth has been reported for several zirconium alloys with a range of metallurgical states during high-temperature tests in fast-breeder reactors (673 to 723 K) for annealed Zircaloys in thermal test reactors at power reactor temperatures (523 to 623 K) and in power reactor core components fab…
Magnetic materials exhibiting gigantic magnetostriction, especially Terfenol, are currently being widely used in fine positioning and active vibration damping devices. By involving accurate magnetostriction models during design stages, precision of such devices may be significantly enhanced. In this paper a straight-f…
Phloroglucinol 4, hydroquinone 5 and naphthalene-2,6-diol 6 react with the monomer 2, activated either by 1,3-dicyclohexylcarbodiimide (DCC) or as its acid.chloride 3. Hydrogenolysis of the benzyl protecting groups, followed by repetition of these procedures leads, divergently, to three series of analytically pure ary…
It is shown that polyester fibres are able to absorb water more easily by making a grooved and/or a non-grooved hollow in a fibre. The effect of water absorbency becomes larger with an increase in the ratio of space to polymer in the fibre cross-section if the yarn and fabric structures are the same. The effect is esp…
After amputation of a salamander limb, the extracellular matrix undergoes remodeling. The extracellular matrix that maintains the differentiated state of limb tissues is broken down and replaced by an extracellular matrix essential for dedifferentiation and blastema formation. We used monoclonal antibodies in immunohi…
A general method is proposed for the molecular level characterization of relaxation and transformation processes in polymer crystals mediated by propagation of conformational imperfections. The proposed approach combines a definition of the defect ensemble, in terms of the extent and boundary conditions of the defect…
The precipitation mechanisms and kinetics in three titanium alloys of different ß-phase stabilities - the ß-rich a α+β titanium alloy Ti-6Al-2Sn-4Zr-6Mo and the near ß-titanium alloys Ti-5Al-2Sn-2Cr-4Mo-4Zr-1Fe(ß- CEZ) and Ti-10V-2Fe-3Al - were investigated by isothermal holding in the α+β field after a ß-solution tre…
The interfacial composition and kinetics of interfacial mixing of two polymers that exhibit strong exothermic interactions, poly( N, N‘ -dimethylethylenesebacamide) (mPA) and the lithium salt of a lightly sulfonated polystyrene ionomer containing 7.4 mol % sulfonate groups (Li−SPS), were characterized by neutron refle…