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。
Enolase (2-phospho-D-glycerate hydrolase; EC 4.2.1.11) from the hyperthermophilic bacterium Thermotoga maritima was purified to homogeneity. The N-terminal 25 amino acids of the enzyme reveal a high degree of similarity to enolases from other sources. As shown by sedimentation analysis and gel-permeation chromatograph…
All articles of this category Epoxidation of trisubstituted olefins using Mn-salen complex ( 1 ) as a catalyst proceeds with high enantioselectivity and the sense of asymmetric induction observed in this reaction could be rationalized mainly by electronic repulsion between salen-benzene ring and unsaturated olefinic s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAlcohol/methylaluminum diphenolate systems as novel, versatile initiators for synthesis of narrow molecular weight distribution polyester and polycarbonateMasaki Akatsuka, Takuzo Aida, and Shohei InoueCite this: Macromolecules 1995, 28, 4, 1320–1322Publication Date (Print):F…
Bacterial polyesters such as polyhydroxybutyrate (PHB) or polyhydroxyalkanoates (PHAs) have to pass the following requirements to be accepted on a large scale: (i) they have to fulfil an urgent market need: (ii) they require that new and efficient composting systems are installed in urban areas; (iii) they have to com…
Using simple statistical mechanical models, we investigate secondary structure formation in the molten globule state of a helix-forming heteropolymer. The theory based on the helix-coil model of Bragg and Zimm correctly treats the one-dimensional aspect of the helix-coil transition but has been modified to include the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure-Property Correlations of Atomistic and Coarse-Grained Models of Polymer MeltsK. S. Schweizer, E. F. David, C. Singh, J. G. Curro, and J. J. RajasekaranCite this: Macromolecules 1995, 28, 5, 1528–1540Publication Date (Print):February 1, 1995Publication History Publi…
International audience
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamic Light Scattering from Dilute, Semidilute, and Concentrated Block Copolymer SolutionsC. Pan, W. Maurer, Z. Liu, T. P. Lodge, P. Stepanek, E. D. von Meerwall, and H. WatanabeCite this: Macromolecules 1995, 28, 5, 1643–1653Publication Date (Print):February 1, 1995Public…
The rheological behaviour of the smectic A phase of the thermotropic liquid crystal 4-cyano-4'-octylbiphenyl (8CB) is examined. X-ray scattering studies under shear flow were performed to probe changes of structures. We found that in a certain range of temperatures two states of orientation of lamellae exist. These tw…
International audience
The ac small‐signal response of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 (LSCF) is examined via lumped parameter/complex plane analysis (LP/CPA) technique. The ac data, acquired in the frequency range 10 − 1 ≤ f ≤ 10 6 Hz , are used to establish the role of ionic contribution in the LSCF material system using a two‐terminal bl…
To improve the surface blood compatibility on a cellulose hemodialysis membrane, a blood compatible polymer with a phospholipid polar group, poly[2-methacryloyloxyethyl phosphorylcholine(MPC)], was immobilized on the surface through the coating of a water-soluble cellulose grafted with poly(MPC) (MPC-grafted cellulose…
The changes in tensile strength, elongation at break, and high strain modulus of dermal sheep collagen (DSC) during in vitro degradation using bacterial collagenase were studied. The changes in mechanical properties were compared with the change in weight of the samples as a function of degradation time. DSC was cross…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSingle-Source Precursors of Lead Titanate: Synthesis, Molecular Structure and Reactivity of Pb2Ti2(.mu.4-O)(.mu.3-O-i-Pr)2(.mu.-O-i-Pr)4(O-i-Pr)4Stephane Daniele, Renee Papiernik, Liliane G. Hubert-Pfalzgraf, Susan Jagner, and Mikael HakanssonCite this: Inorg. Chem. 1995, 34…
A review of the performance of diamond single crystals as a high heat load optical component for synchrotron x rays is given. It has been proven experimentally that the bandpass and the angular divergence of the monochromatic beam provided by a relatively thin diamond crystal used in an undulator beam are not degraded…
To study surface property-dependent human monocyte adhesion and cytokine (IL-1 beta, IL-6, TNF-alpha) production, poly(tetrafluoroethylene/hexafluoropropylene) (FEP) polymer was modified to exhibit neutral, anionic, or cationic properties by incorporating amide (CONH2) and/or carboxyl (COOH) or aminoethyl amide [CONH(…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTime-Domain Electron Paramagnetic Resonance as a Probe of Electron-Electron Spin-Spin Interaction in Spin-Labeled Low-Spin Iron PorphyrinsMargaret H. Rakowsky, Kundalika M. More, Alexander V. Kulikov, Gareth R. Eaton, and Sandra S. EatonCite this: J. Am. Chem. Soc. 1995, 117…
The structure of an adsorbed polymer layer in equilibrium with a dilute good solvent is considered theoretically. It is shown that under saturation conditions the tails of the polymer chains give an important contribution to the monomer density profile in the outer layer away from the wall: the tail contribution domin…
Surface composition of a series of segmented poly(siloxane urea urethane)'s have been determined by angle- and energy-dependent ESCA. The polymers are based on aminopropyl end-capped dimethylsiloxane oligomers, isophorone diisocyanate and 1,4-benzene dimethanol. Effects of segmental length and annealing on the surface…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTScalar Relativistic Effects on 17O NMR Chemical Shifts in Transition-Metal Oxo Complexes. An ab Initio ECP/DFT StudyMartin Kaupp, Vladimir G. Malkin, Olga L. Malkina, and Dennis R. SalahubCite this: J. Am. Chem. Soc. 1995, 117, 6, 1851–1852Publication Date (Print):February 1…