Materials Literature
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The effects of the heating rate from 0.6 up to 50 oC.s-1 on the thermoluminescence of a-Al2O3:C are very intensive. The material rapidly loses its high sensitivity as the heating rate increases. The peak shape characteristics, peak maximum and full width at half maximum agree only qualitatively with those theoreticall…
Free-standing monodomain thick films of three liquid crystalline compounds were examined by x-ray scattering. These compounds exhibit a unique enantiotropic crystal-B--hexatic-B--smectic-A phase sequence with no evidence of herringbone order. The hexatic order parameter ${\mathit{C}}_{6}$ changes in the hexatic phase…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTDefect-Enhanced Structural Relaxation Mechanism for the Evolution of Hot Spots in Rapidly Compressed CrystalsD. H. Tsai and R. W. ArmstrongCite this: J. Phys. Chem. 1994, 98, 43, 10997–11000Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Pub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies of Oxygen Species in Synthetic Todorokite-like Manganese Oxide Octahedral Molecular SievesYuan-Gen Yin, Wen-Qing Xu, Yan-Fei Shen, Steven L. Suib, and C. L. O'YoungCite this: Chem. Mater. 1994, 6, 10, 1803–1808Publication Date (Print):October 1, 1994Publication Histo…
Scaling analyses are performed for grafted polymers in marginally poor solvents, where the chains are not strongly collapsed. We obtain the first phase diagram for such systems which includes all three possible structures: layers, "mushrooms", and clusters. Clusters are found to exist in a region between the layer and…
Abstract Solubility and liquid‐liquid phase equilibrium data are presented for the ternary system water‐phosphoric acid‐methyl isobutyl ketone at 25 and 40°C. Binodal curves, tie lines and distribution curves have been determined. Hand's method has been used to correlate tie lines and to calculate coordinates of plait…
Abstract Alteration experiments have been performed using RTT7 and synthetic basaltic glasses in MgCl 2 −CaCl 2 salt solution at 190°C. The duration of experiments ranged from 0.25 to 463 days. The alteration products were studied by Scanning Electron Microscope (SEM), Scanning Transmission Electron Microscope (STEM),…
Abstract A planar heterodinuclear phthalocyaninylnaphthalocyanine (1) in which a phthalocyanine (Pc) and naphthalocyanine (Nc) share a common benzene ring has been synthesized for the first time and its electronic absorption, magnetic circular dichroism (MCD), and fluorescence data are reported. 1 and its deprotonated…
A preclinical toxicology study of liposome encapsulated vincristine, free vincristine and empty liposomes was carried out in mice and dogs by single and multiple (daily for 5 days) intravenous injection. Single and multiple dose intravenous injection studies in mice showed the encapsulated form of vincristine to be le…
The central gap in the density of states and the localization of states on a Penrose lattice are investigated within a tight-binding model for the vertex problem. The results show that the gap is a consequence of frustration. There are surface states within the gap in a finite lattice. The correlation between the appe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfluence of the Surface Atom Metallic Coordination in the Adsorption of Ethylene on a Platinum Surface: A Theoretical StudyJ.-F Paul and P. SautetCite this: J. Phys. Chem. 1994, 98, 42, 10906–10912Publication Date (Print):October 1, 1994Publication History Published online1…
BaTiO3 ultrafine particles of different size were prepared by Sol-Gel process. Their microstructure was examined at room temperature. The temperature dependence of the dielectric properties of the pressed pellets and fired ceramics of these particles was studied. With the decrease of particle size d, the Curie tempera…
A unique carboxyl proteinase (EC 3.4.23.33), insensitive to the classical inhibitor isovaleryl pepstatin and isolated from Pseudomonas sp. 101 (PCP), is the first example of a prokaryotic enzyme of this class. The gene coding for PCP was cloned, sequenced, and expressed in Escherichia coli. The gene consists of 1,761…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolid-State Polymerization of 15,17,19,21,23,25-TetracontahexayneShuji Okada, Kikuko Hayamizu, Hiro Matsuda, Atsushi Masaki, Nobutsugu Minami, and Hachiro NakanishiCite this: Macromolecules 1994, 27, 22, 6259–6266Publication Date (Print):October 1, 1994Publication History Pu…
The electrical conductivity of In 2 O 3 ‐ ZrO 2 as well as In 2 O 3 solid solutions doped with SnO 2 , CeO 2 , Nb 2 O 5 , Pr 6 O 11 , and MgO is investigated, in the temperature range between room temperature and 1300°C, and in the oxygen partial pressure range between 5 × 10 − 5 and 1 atm. In 2 O 3 doped with ZrO 2 i…
Pure non-reactive metals develop weak interactions with iono-covalent oxides (insulators) which can be both physical (van der Waals) and chemical (low density interfacial electronic states). As a result, non-wetting is generally observed, the contact angle being larger than 90 degrees. Improvement of wetting can be ob…
Abstract Vibrational spectra of zinc tris(thiourea) sulphate (ZTS), a new semiorganic non‐linear optical crystal, were recorded to determine the symmetries of molecular vibrations. The observed Raman and infrared bands are assigned to molecular vibrations of thiourea, sulphate groups and Zn(thiourea) 3 SO 4 tetrahedra…
A focused ion beam (FIB) has been applied for transmission electron microscope (TEM) sample preparation. The sample tilt method is demonstrated to correct the cross-sectional taper shape of the TEM sample. The origin of the taper is discussed using the time-dependent surface development under the FIB trench milling. A…
A new series of chiral homologous thiobenzoates with non-chiral end chains ranging from heptyloxy to octadecyloxy has been synthesized and characterized. The mesomorphic properties have been analysed by optical microscopy on pure compounds and mixtures, DSC, and electro-optical and pitch measurements. They display a v…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Characterization of Poly[(R,S)-3-hydroxybutyrate-b-6-hydroxyhexanoate] as a Compatibilizer for a Biodegradable Blend of Poly[(R)-3-hydroxybutyrate] and Poly(6-hydroxyhexanoate)Hideki Abe, Yoshiharu Doi, and Yoshiharu KumagaiCite this: Macromolecules 1994, 27, 2…