Materials Literature
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Abstract 2,3,6,7,14,15-Hexamethyl-9,10-distibatriptycene (3) reacted with bromine to give an adduct 4 with the composition of 3·2Br2. X-ray structure analysis and 1H NMR studies revealed that the bromine adduct 4 forms an intramolecular salt composed of a tetracoordinate bromostibonium ion moiety, R3SbBr+, and a hexac…
The enhancer of rudimentary gene, e(r), of Drosophila melanogaster encodes an enhancer of rudimentary (ER) protein with functions implicated in pyrimidine biosynthesis and the cell cycle. The ER homolog (ERH) is highly conserved among vertebrates, invertebrates, and plants. Xenopus laevis ERH was reported to be a tran…
A gene encoding a quinolinate synthase has been identified in the hyperthermophilic archaeon Pyrococcus horikoshii via genome sequencing. The gene was overexpressed in Escherichia coli, and the crystal structure of the produced enzyme was determined to 2.0 A resolution in the presence of malate, a substrate analogue.…
Abstract LaF3 : Yb3+, Er3+ nanoparticles were synthesized through a simple hydrothermal method. The nanoparticles were well-crystallized and exhibited hexagonal structure with fine morphology, as indicated by powder X-ray diffraction, electron diffraction, and transmission electron microscopy. The nanocrystals present…
We studied the fluorescence of quantum dots in cells. Coating quantum dots with cationic peptides caused them to be endocytosed and transported to lysosomes. After overnight incubation, their fluorescence apparently dimmed but became markedly "photoactivatable", increasing more than 3-fold within minutes on exposure t…
Understanding relationships between sequence, structure, and evolution is important for functional characterization of proteins. Here, we define a novel DOM-fold as a consensus structure of the domains in DmpA (L-aminopeptidase D-Ala-esterase/amidase), OAT (ornithine acetyltransferase), and MocoBD (molybdenum cofactor…
Abstract The deintercalation of carbonate ions from a hydrotalcite-like compound (MgAl-LDH) was investigated using salt-HCl mixed solutions with sodium salts containing various monovalent anion species. The deintercalation was influenced by the anion species, and the carbonate ions were deintercalated most easily for…
Pseudomonas aeruginosa produces the biosurfactant rhamnolipid, which has several potential biotechnological applications. The synthesis of this surfactant is catalyzed by rhamnosyltransferase 1, composed of the proteins RhlA and RhlB. Here we report that RhlA plays a role not only in surfactant synthesis, but also in…
The synthesis and X-ray structure of the low-coordinate, high-spin Fe(I) compound LFe(HCCPh) (L = HC(C[tBu]N[2,6-diisopropylphenyl])2]-), 1, are reported. Low-temperature Mössbauer and electron paramagnetic resonance (EPR) spectroscopies reveal that the electronic ground state is a Kramers doublet with uniaxial magnet…
Deproteinized natural rubber latex (DPNR-latex) was treated with lipase and phosphatase in order to analyze the structure of the chain-end group (alpha-terminal). The enzymatic treatment decreased the content of long-chain fatty acid ester groups in DPNR from about 6 to 2 mol per rubber molecule. The molecular weight…
Using density functional theory we demonstrate that superconductivity in C6Ca is due to a phonon-mediated mechanism with electron-phonon coupling 0.83 and phonon-frequency logarithmic-average 24.7 meV. The calculated isotope exponents are 0.24 for Ca and 0.26 for C. Superconductivity is mostly due C vibrations perpend…
Introduction bond-band-barrier (BOLS) correlation for the effect of electronic process of oxidation and the bond order-length-strengtrh (BOLS) correlation for the behaviour of nanostructures.
This paper reports the structure-dependent molecular orientation behavior of sericin, an adhesive silk protein secreted by silkworm, Bombyx mori. Although application of sericin as a biomaterial is anticipated because of its unique characteristics, sericin's physicochemical properties remain unclear, mainly because of…
[reaction: see text] Photochromic dithienylethene moieties were covalently attached to fluorescent 4,4-difluoro-8-(4'-iodophenyl)-1,3,5,7-tetramethyl-4-bora-3a,4a-diaza-s-indacene (iodo-BODIPY) via a phenylacetylene linker. UV light induced isomerization of the photochrome results in significant decrease in fluorescen…
Magnetic properties of ${\mathrm{M}}_{c}{\mathrm{Ta}}_{2}{\mathrm{S}}_{2}\mathrm{C}$ $(\mathrm{M}=\mathrm{Fe},\mathrm{Co},\mathrm{Ni},\mathrm{Cu})$ have been studied using superconducting quantum interference device dc and ac magnetic susceptibility. In these systems magnetic ${\mathrm{M}}^{2+}$ ions are intercalated…
The surface tension of a model, water-based, flexographic printing ink was measured at a range of surfactant concentrations along with the equilibrium contact angle formed with polymer substrates. The surface excess of surfactant at each concentration was calculated using the Gibbs adsorption isotherm and assumed equa…
Ab initio calculations reveal that ultrashort-period epitaxial KNbO3∕(KTaO3)m superlattice exhibits typical ferroelectricity when m=1 or 2; while it becomes paraelectric when m⩾3. We observe considerable and tantamount dipole moment in each cell, which can be attributed to the continuity of dipole moment at the interf…
Abstract Mannose‐functionalized and ethoxyethanol‐functionalized poly(amido)amine dendrimers bound multiple vanadate‐substituted polyoxotungstate Wells–Dawson‐type polyoxometalates (POMs). Dendrimers incorporating 10–30 POMs were characterized with NMR, transmission electron microscopy, and matrix‐assisted laser desor…
Patterning and fusion of CuO nanorods with a focused laser beam, Yu, Ting, Sow, Chorng-Haur, Gantimahapatruni, Aditya, Cheong, Fook-Chiong, Zhu, Yanwu, Chin, Kok-Chung, Xu, Xiaojing, Lim, Chwee-Teck, Shen, Zexiang, Thong, John Thiam-Leong, Thye-Shen Wee, Andrew
A phosphoserine-containing peptide was identified from tryptic digests from Sulfolobus solfataricus P1 by liquid chromatography-tandem mass spectrometry. Its amino acid sequence closely matched that bracketing Ser-309 in the predicted protein product of open reading frame sso0207, a putative phosphohexomutase, in the…