Materials Literature
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Abstract BACKGROUND: While carbon nanotubes are highly interesting materials for a variety of applications, their inherent insolubility limits widespread applications and solution‐phase processing. It is known that chemical functionalization can overcome this insolubility problem, and covalent grafting of polymers to…
Abstract Rigid polyurethane foams (RPUFs) have been fabricated from crude MDI (CMDI) and polypropylene glycols (PPGs) of various functionalities ( f ) with HFC 365mfc as a blowing agent. Foam density increased, cell size and density distribution decreased with increasing f while the closed cell content was kept consta…
This paper presents a novel and facile method for the fabrication of nanocomposite films with ordered porous surface structures. In this approach, a water-borne poly(styrene-co-butyl acrylate-co-acrylic acid)/silica nanocomposite dispersion was synthesized in situ by surfactant-free emulsion polymerization by using 3-…
Photoinduced electron transfer (ET) in films of the double-linked free-base phthalocyanine−fullerene dyads (Pc−C 60 ) was studied in solid Langmuir−Blodgett (LB) films using femtosecond pump−probe and microsecond flash-photolysis methods. Excitation of the phthalocyanine (Pc) moiety of the dyad results in a rapid (0.8…
Expression of genes in the gapA operon encoding five enzymes for triose phosphate interconversion in Bacillus subtilis is negatively regulated by the Central glycolytic genes Regulator (CggR). CggR belongs to the large SorC/DeoR family of prokaryotic transcriptional regulators, characterized by an N-terminal DNA-bindi…
Candida antarctica Lipase B (CALB), immobilized on Lewatit (Novozym 435), was used as catalyst to prepare a series of poly(butylene carbonate- co -butylene succinate) [poly(BC- co -BS)] copolymers. The polymers were synthesized by copolymerizations of diethyl carbonate (DEC), 1,4-butanediol (BD), and diethyl succinate…
On basis of a coarse-grained model, we investigate the conformational behavior of a spherical polyelectrolyte brush (SPB) in a solution containing oppositely charged linear polyelectrolytes. Our results obtained from Brownian dynamics (BD) simulations show that with increasing amount of linear polyelectrolytes the SPB…
Time-resolved small-angle X-ray scattering measurements using synchrotron radiation have been conducted during tensile deformation of a poly(ethylene terephthalate) fiber at room temperature. The marked change of the scattering patterns from the layer-line scattering with a four-spot nature to the layer-line scatterin…
Quantum chemical calculations of geometric and electronic structure and vertical transition energies for several low-lying excited states of the neutral and negatively charged nitrogen-vacancy point defect in diamond (NV(0) and NV(-)) have been performed employing various theoretical methods and basis sets and using f…
The heat capacities in the solid state, below the glass transition, of Bombyx mori silk fibroin with and without water have been determined based on the contribution of vibrational motions of the components: poly(amino acid)s and water. These vibrational heat capacities were constructed using the Advanced Thermal Anal…
The scattering properties of multipole plasmon resonances sustained by silver and gold nanorods (NRs) are investigated using classical electrodynamics DDA (discrete dipole approximation) simulations. The angular distribution of the scattered light is examined as a function of the multipole order, NR length, noble meta…
Lead sulfide nanocrystals were grown in toluene solutions of poly(2-methoxy-5-(2′-ethyl-hexyloxy)- p -phenylene vinylene, polyethylene, poly(1-butene), poly(1-decene), and polystyrene. The PbS nanocrystal diameter was controlled by the polymer used for synthesis and ranged from 4 to 9 nm. Strong nonlinear absorption w…
Gigantische Metallkäfige: Mesoporöse Pt-Partikel mit dreidimensional verbundenen Mesokäfigen (siehe Bild) werden durch Elektroabscheidung mithilfe eines lyotropen Flüssigkristalltemplats bestehend aus Diblockcopolymeren erzeugt. Die Mesokäfige (Weite ca. 15 nm) sind die bislang größten, die in mesoporösen Metallen geb…
Gently brought into line: Functionalized carbon nanotubes (see picture, C,H black, N blue) facilitate a high degree of orientation in a weak magnetic field , as detected by linear dichroism spectroscopy (incident planes of light A⊥ and A∥). In addition, relaxation measurements in the magnetic field allow the length of…
A three-layer feed-forward artificial neural network (ANN) was constructed and tested to analyze the crystal growth rate of sucrose under different operating conditions. The operating variables studied were used as inputs to predict the corresponding crystal growth rate. The operating variables studied include the sup…
Abstract Surface plasmon (SP) coupling technique was used to enhance light emissions from semiconductor nanocrystals with evaporated metal layers. We found that the SP coupling can increase the internal quantum efficiencies (IQE) of emission from CdSe‐based nanocrystals regardless of the initial efficiencies. This sug…
The phase boundary between beta-Si(3)N(4) and gamma-Si(3)N(4) is investigated at high pressure and high temperature using first-principles lattice dynamics calculations within the quasi-harmonic approximation. We find a positive slope of the phase boundary, hence, at higher temperatures it requires higher pressures to…
Abstract Efforts of fabricating single crystalline ZnO thin films by the mist chemical vapor deposition (CVD) method have been reported in this paper. In our previous research, by using the water solution of zinc acetate as the Zn source, we have not succeeded in obtaining ZnO thin films of single crystalline structur…
Abstract Poly(acryloyl chloride) (PACl) was employed to enhance the surface of multi‐walled carbon nanotubes (MWCNTs). MWCNTs were first acid treated to generate hydroxyl groups on the surface, which was reacted with PACl to obtain an encapsulation. The numerous acryloyl chloride groups on the out layer were esterifie…
BACKGROUND: L-Dopa decarboxylase (DDC) is a pyridoxal 5'-phosphate-dependent enzyme that was found to be involved in many malignancies. The aim of this study was to investigate the mRNA expression levels of DDC in prostate tissues and to evaluate its clinical utility in prostate cancer (CaP). METHODS: Total RNA was is…