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。
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Pronounced Axial Ligand Effect on the Reactivity of Oxoiron(IV) Porphyrin Cation RadicalsZeev Gross and Shay NimriCite this: Inorg. Chem. 1994, 33, 9, 1731–1732Publication Date (Print):April 1, 1994Publication History Published online1 May 2002Published inissue 1 April 199…
The frequency ω versus wave vector k of elastic waves propagating in periodic binary composites consisting of solid inclusions placed periodically in a host matrix was calculated. Attention was focused on the possibility of stop bands (spectral gaps) for all directions of propagation in such composites. It was found t…
“Supercapacitors” are a new category of electrical condenser which are based on the properties of charge distribution at the interface of an electrode/electrolyte solution. After an introduction to the features of such devices, a brief history of their development is followed by a description of some technical details…
The effective experimental critical exponents \ensuremath{\alpha}, \ensuremath{\gamma}, ${\ensuremath{\nu}}_{\mathrm{\ensuremath{\parallel}}}$, and ${\ensuremath{\nu}}_{\mathrm{\ensuremath{\perp}}}$ obtained from high-resolution heat capacity and x-ray studies of nematic--smectic-A transitions in liquid crystals are p…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic Acyl Transfer by a Cyclic Porphyrin Trimer: Efficient Turnover without Product InhibitionLindsey G. Mackay, R. Stephen Wylie, and Jeremy K. M. SandersCite this: J. Am. Chem. Soc. 1994, 116, 7, 3141–3142Publication Date (Print):April 1, 1994Publication History Publi…
Within the thermodynamics of irreversible processes and the concept of in ternal state variables, a general phenomenological theory of coupled damage-elasto- (visco)plasticity at small strains is given. The state variables (external and internal) are considered to evolve phenomenologically according to competing proce…
Biomimetics is a newly emerging interdisciplinary field in materials science and engineering and biology in which lessons learned from biology form the basis for novel technological materials. It involves investigation of both structures and physical functions of biological composites of engineering interest with the…
The active form of pyruvate formate-lyase (PFL) from Escherichia coli contains a glycyl radical in position 734 of the polypeptide chain which is produced post-translationally by pyruvate formate-lyase-activating enzyme (PFL activase) using S-adenosylmethionine (AdoMet) and dihydroflavodoxin as co-substrates (Wagner,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase Behavior and Association Properties of Poly(oxypropylene)-Poly(oxyethylene)-Poly(oxypropylene) Triblock Copolymer in Aqueous SolutionZukang Zhou and Benjamin ChuCite this: Macromolecules 1994, 27, 8, 2025–2033Publication Date (Print):April 1, 1994Publication History Pu…
The pressure and temperature dependent viscosities of two glass forming liquids, glycerol and dibutyl phthalate (DBP), have been studied in the range P=0–3 GPa, T=0–125 °C, and η=101–1010 cP. These studies were made using a combination of a rolling-ball and a centrifugal-force diamond anvil cell viscometer. The majori…
Diffraction of light by periodic gratings is analyzed with a characteristic-matrix formalism based on a rigorous coupled-wave approach. This formalism is particularly convenient for modeling the diffraction by nonuniform periodic structures. In order to overcome numerical difficulties that are due to inhomogeneous eig…
Abstract We study a variational problem involving a nonconvex function of Δ u , regularized by a higher order term. The motivation comes from the theory of martensitic phase transformation—specifically, a model for the fine scale structure of twinning near an austenite‐twinned‐martensite interface. It is widely believ…
Resonance light-scattering measurements have been employed to investigate the solute species present in acidic aqueous media for some 14 sulfonated porphyrins. The results confirm that the anomalous absorption band in the Soret region reported for several of these porphyrins arises from the formation of extended aggre…
A new microcalorimeter for measuring heat capacity of thin films in the range 1.5–800 K is described. Semiconductor processing techniques are used to create a device with an amorphous silicon nitride membrane as the sample substrate, a Pt thin film resistor for temperatures greater than 40 K, and either a thin film am…
A molecular mechanism is proposed to explain the anomalous optical reorientation observed in nematic guest-host systems. According to the model, light-induced reorientation in these systems is due to the interaction between the excited dye molecules and the nematic host. The model justifies a phenomenological descript…
Journal of the American Chemical Society
In Bacillus subtilis stress proteins are induced in response to different environmental conditions such as heat shock, salt stress, glucose and oxygen limitation or oxidative stress. These stress proteins have been previously grouped into general stress proteins (Gsps) and heat-specific stress proteins (Hsps). In this…