Materials Literature
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Encapsulation of β-carotene inside single-walled carbon nanotubes (SWCNTs) greatly improves the stability of β-carotene. The Figure shows a schematic illustration of β-carotene inside a SWCNT. The surrounding tube wall protects β-carotene from reacting with radical species and suppresses its isomerization. This protec…
Giving cobalt some stick: A general strategy for the synthesis of 1D assemblies of hollow nanocrystals is presented. Cobalt nanostructures assembled through magnetic dipolar interactions (see scheme) are used as templates for the formation of wires of hollow nanocrystals of CoSe2 (and Co3S4, CoTe). The wires of hollow…
Highly ordered monolayers of macrocyclic oligothiophene C[12]T (see Figure) can be used as veritable templates to epitaxially grow 3D nanoarchitectures with C60-fullerenes. Due to submolecularly resolved STM images, 1:1 complexes consisting of a ring-shaped p-type semiconductor (C[12]T) and a spherical n-type semicond…
We show that colloidal particles with attractive interactions induced by a nonadsorbing polymer exhibit a stable phase consisting of a fluid of clusters of particles. This phase persists even in the absence of any long-range repulsion due to charge, contrary to expectations based on simulation and theory. Cluster morp…
The all-electron GW approximation energy band gap of bulk hexagonal boron nitride is shown to be of indirect type. The resulting computed in-plane polarized optical spectrum, obtained by solving the Bethe-Salpeter equation for the electron-hole two-particle Green function, is in excellent agreement with experiment and…
We report on orientational order and dynamics of a nematic liquid crystal confined in porous silica. 13 C NMR lineshape is used as a fingerprint for this study. A procedure based on exchange of non-coupled sites is implemented in order to obtain the corresponding local order parameter S and the characteristic time for…
The calcium-binding sites of calbindin D(9k) have a helix-loop-helix motif. In this study, the helix motifs were replaced by several Ala-Gly repeating regions designed on the basis of the primary sequences of several silk fibroins. The synthesized peptides were treated with several organic solvents to modify the secon…
Understanding the interaction between silicate ions and surfactants is critical for the design and development of mesoporous siliceous materials. We examined the interaction between sodium silicate ions and three different cationic surfactants [namely, cetyltrimethylammonium bromide (CTAB), tetradecyltrimethylammonium…
The crystal structures of Nd(0.7)Ti(0.9)Al(0.1)O3, taken to represent the ideal Nd(2/3)TiO3, have been elucidated from 4 to 1273 K using high-resolution neutron powder diffraction in combination with group-theoretical analysis. The room-temperature structure is monoclinic in C2/m, on a cell with a = 7.6764 (1), b = 7.…
L-allo-Threonine aldolase (L-allo-threonine acetaldehyde-lyase), which exhibited specificity for L-allo-threonine but not for L-threonine, was purified from a cell-free extract of Aeromonas jandaei DK-39. The purified enzyme catalyzed the aldol cleavage reaction of L-allo-threonine (K(m) = 1.45 mM, Vmax = 45.2 mumol m…
Abstract The conductivity type conversion from p ‐ to n ‐type at a critical temperature of 315 K in TlGaS 2 crystals is observed through the Hall effect measurements in the temperature range of 200–350 K. The analysis of the temperature‐dependent electrical resistivity, Hall coefficient and carrier concentration data…
A transposon Tn917-induced mutant strain of Staphylococcus xylosus was isolated that required exogenous cysteine for growth. The transposon was found to reside within a gene, designated cysE, encoding a protein of 216 amino acids with a high level of similarity to bacterial serine acetyltransferases. The cysE::Tn917 m…
The Rolls-Royce integrated-planar solid oxide fuel cell (IP-SOFC) consists of ceramic modules with electrochemical cells printed on the outer surfaces. The cathodes are supplied with oxygen from air flowing over the outside of the module and the anodes are supplied with fuel diffusing from the internal gas channels. N…
Abstract The curing system of diglycidyl ether of bisphenol A (DGEBA) with two phosphorus‐containing amine compounds—bis(3‐aminophenyl)methyl phosphine oxide and bis(4‐aminophenyl)‐bis(9,10‐dihydro‐9‐oxa‐10‐oxide‐10‐phosphaphenanthrene‐10‐yl)methane—was studied with differential scanning calorimetry under isothermal a…
A poly(3-hydroxybutyric acid) (PHB) depolymerase gene of Comamonas testosteroni YM1004 was cloned on Sau3AI fragment from genomic DNA into Escherichia coli DH5. Nucleotide sequence analysis dedicated a 1539 bp open reading frame encoding a protein 513 amino acid with a putative 25 residue signal peptide for secretion.…
The correct correspondence address for the authors of this Communication is: State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter and Graduate School of the Chinese Academy of Sciences Fuzhou, Fujian 350002 (P. R. China)
Using natural rubber latex as the sole source of carbon and energy 50 rubber-degrading bacteria were isolated. Out of those 50 isolates, 33 were identified as Streptomyces species and 8 as Micromonospora species. Screening of 1220 bacteria obtained from different culture collections revealed 46 additional rubber-degra…
Release 2005/1 of the Inorganic Crystal Structure Database contains 158 entries under the space group R3. The first 81 together with 15 related entries include 52 different structure types, 10 of which represent families that have two or more isostructural members. There are 18 types that satisfy the structural criter…
The synthesis and characterization of two manganese(II) complexes formally each featuring two cis-tetracyanoethylenide radical anionic ligands (TCNE*/-) are reported. In each case, tris(pyrazol-1-ylmethyl)amine serves as a capping ligand, blocking three facial coordination sites. Crystal structures show that the two T…
Two models for predicting the stress-strain curve of porous NiTi under compressive loading are presented in this paper. Porous NiTi shape memory alloy is considered as a composite composed of solid NiTi as matrix and pores as inclusions. Eshelby’s equivalent inclusion method and Mori-Tanaka’s mean-field theory are emp…