Materials Literature
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We report on efficient frequency upconversion in ${\mathrm{Er}}^{3+}$ -doped fluoroindate glass. The process is observed under 1.48 \ensuremath{\mu}m laser diode excitation and results in fluorescence generation in the range from ultraviolet to near-infrared radiation. The study was performed for samples containing 1,…
Highly pure aluminum was anodized at a constant current density of 25 A m − 2 at 293 Kin 0.5 M boric acid/0, 0.005, or 0.05 M sodium tetraborate solutions, to examine the effect of sodium tetraborate concentration on the formation and breakdown characteristics of barrier oxide films by using inductively coupled plasma…
This article on acoustic cavitation is a revision of a tutorial lecture presented at the Acoustical Society of America meeting in Austin, Texas, on 28 November 1994. The general approach adopted here differs from a review article in stressing the overarching themes that come under the category of acoustic cavitation,…
Single crystals of Dabco−MnGS−SB1 (MnGe 4 S 10 ·(C 6 H 14 N 2 )·3H 2 O) were synthesized hydrothermally in the presence of Dabco (1,4-diazabicyclo[2.2.2]octane). This material ( Pna 2 1, a = 18.367(2), b = 14.184(2), and c = 9.410(1) Å) contains [Ge 4 S 10 ] 4 - adamantine clusters corner-linked through distorted Mn 2…
, which finally can be situated below the values predicted by the additivity rules. Vice versa, the corresponding argument will hold for blends with higher interchain orientation induced by intensive exothermic hetero-contact forces.
ABSTRACT An optimal caseinate‐acetylated monoglyceride edible coating consisting of 1.5% Alanate‐310 (a calcium caseinate) and 1.5% Myvacet‐5‐07 (an acetylated monoglyceride) produced a reduction (75%) in moisture loss from celery ( Apium graveolens ) sticks. Similar edible coatings on apple ( Malus domestica ) fruits…
The solvent effect on the molecular first hyperpolarizability, β, of p -nitroaniline ( p NA) has been investigated. Using the hyper-Rayleigh scattering technique, we have also determined β of p NA in DMSO using 1064 nm laser radiation. This β value has not been previously reported. With the help of Onsager's theory, w…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTVisualization of Critical pH-Controlled Gating of a Porous Membrane Grafted with Polyelectrolyte BrushesYoshihiro Ito, Yong Soon Park, and Yukio ImanishiView Author Information PRESTO, Japan Science and Technology Cooperation Department of Material Chemistry Graduate S…
The low-temperature ${\mathrm{T}}^{2}$ rise and the subsequent plateau of the thermal conductivity of glasses allow one to determine two parameters of the phenomenological soft-potential model. The first of these is a weighted average C-bar of the dimensionless parameter combinations ${\mathrm{C}}_{\mathrm{l}}$ and ${…
Abstract Trialkyl cis-1,3,5-cyclohexanetricarboxamides were able to cause physical gelation in organic liquids to afford completely transparent organogel. The main driving force for gelation was intermolecular hydrogen bonding between amides and van der Waals interaction among hydrophobic alkyl chains.
1 H-NMR spectral properties of two paramagnetic binuclear copper(II) complexes 1 and 2, which are weakly antiferro- and ferromagnetically coupled, respectively, in the solid state, have been studied in solution; corresponding parameters are compared to a mononuclear copper(II) analogue 1a . Compound 1 exhibits unusual…
We report a convenient and general synthesis of β-octafluoroporphyrins bearing meso -tetraaryl substituents, including the first synthesis and full characterization of a perfluorinated tetraarylporphyrin, perfluoro-5,10,15,20-tetraphenylporphyrin, 2 . The structural, spectroscopic, and electrochemical data indicate th…
Abstract Molybdenum(VI) solutions were investigated in detail by Raman spectroscopy with a view to establishing the speciation of the predominant polynuclear species (isopolymolybdates) formed in aqueous solution. The most intense Raman frequencies due to asymmetric stretching vibration of Mo=O were very sensitive to…
A structural feature shared by many protein kinases is the requirement for phosphorylation of threonine or tyrosine in the so-called activation loop for full enzyme activity. Previous studies by several groups have indicated that the isotypes alpha, betaI, and betaII of protein kinase C (PKC) are synthesized as inacti…
Newly surveyed sets of energy loss cross sections are presented for N2, O2, and O. The work was motivated by a number of new electron energy loss measurements in the late 1980s and early 1990s and recent selected review articles. Each set includes a total ionization cross section and excitation cross sections that cor…
Abstract Four heterogeneous nucleating agents were added to polypropylene (PP) homoblock and random copolymers. Melting and crystallization of the polymers were studied by differential scanning calorimetry (DSC), and characteristics derived from the crystallization exotherms were related to the mechanical properties o…
Scatterometry, the analysis of light diffraction from periodic structures, is shown to be a versatile metrology technique applicable to a number of processes involved in the production of microelectronic devices. We have demonstrated that the scatterometer measurement technique is robust to changes in the thickness of…
Poly(ε-caprolactone) (PCL) with a wide range of molecular weight (MW) has been prepared via fractionation by either precipitating PCL/chloroform solutions into different amounts of methanol or adding methanol into PCL/tetrahydrofuran (THF) solutions. The samples with M n ranging from 1900 to 64 700 were used to invest…
This paper presents the evaluation of enhancement in the mechanical properties of short sisal fiber reinforced polyethylene composites by the incorporation of short glass fiber as an intimate mix with sisal. Intimately mixed short glass-sisal hybrid fiber reinforced polyethylene composites (GSRP) were prepared by solu…
The development of second-generation photosensitizers to improve photodynamic therapy (PDT) is an area of extensive research. Three such compounds that have been synthesized in our group are polysubstituted Zn(II) phthalocyanines that differ in their overall net charge (one cationic, one anionic and one neutral). The…