Materials Literature
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Confocal Raman microspectrometry has been applied to the in situ study of an electrical double-layer capacitor involving activated carbon cloth electrodes and an organic electrolyte. The Raman spectra of the carbon electrodes have been recorded during the charge and discharge. The intensity variations of the G and D b…
The thermal stability and spectroscopic properties of Er 2 O 3 ‐doped TeO 2 –GeO 2 –ZnO–Na 2 O–Y 2 O 3 glasses for 1.5 μm fiber amplifiers were investigated. The thermal stability of the 75TeO 2 ·20ZnO· 5Na 2 O glass was improved by introducing GeO 2 and Y 2 O 3 . The radiative transition and the nonradiative transiti…
Poly(L-lactic acid) (PLA)-degrading Amycolatopsis sp. strains K104-1 and K104-2 were isolated by screening 300 soil samples for the ability to form clear zones on the PLA-emulsified mineral agar plates. Both of the strains assimilated >90% of emulsified 0.1% (wt/vol) PLA within 8 days under aerobic conditions. A novel…
In this paper, we show that dilute maleic acid, a dicarboxylic acid, hydrolyzes cellobiose, the repeat unit of cellulose, and the microcrystalline cellulose Avicel as effectively as dilute sulfuric acid but with minimal glucose degradation. Maleic acid, superior to other carboxylic acids reported in this paper, gives…
Yong-Ling Ruan, Danny J. Llewellyn, Robert T. Furbank, The Control of Single-Celled Cotton Fiber Elongation by Developmentally Reversible Gating of Plasmodesmata and Coordinated Expression of Sucrose and K⁺ Transporters and Expansin, The Plant Cell, Vol. 13, No. 1 (Jan., 2001), pp. 47-60
BACKGROUND: Resistance to chemotherapeutic agents and poor blood-brain barrier penetration are major limitations in the treatment of malignant glioma. To improve drug delivery across the blood-brain barrier, the authors used doxorubicin as liposomal encapsulated formulation (Caelyx, Scheringh-Plough, Munich, Germany)…
Research Article| January 01, 2001 Geochemical Stability of Natural Zeolites Steve J. Chipera; Steve J. Chipera Los Alamos National Laboratory, Mail Stop D469, Los Alamos, New Mexico 87545 Search for other works by this author on: GSW Google Scholar John A. Apps John A. Apps Lawrence Berkeley National Laboratory, Mail…
The effect of various electrochemical pre-treatment methods on the surface and electrochemical properties of screen-printed carbon paste electrodes (SPCE) prepared with three different commercial products was examined. It was observed that a positively charged redox couple, e.g., hexaammineruthenium(III), exhibited qu…
A new series of achiral five-ring banana-shaped compounds is presented which exhibit a cyano substituent in the 4-position of the central core. It follows from X-ray investigations and from NMR, microscopical and electro-optical measurements that all members of the series do not only form the chiral B2 phase character…
Microcapsules in the micrometer size range with walls of nanometer thickness are of both scientific and technological interest, since they can be employed as micro- and nano-containers. Liposomes represent one example, yet their general use is hampered due to limited stability and a low permeability for polar molecule…
A novel and simple one-step, solid-state reaction in the presence of a suitable surfactant has been developed to synthesize uniform copper oxide nanorods with average diameters of ca. 8 nm and lengths of up to 400 nm.
The crystalline phase of polyamide 6 (otherwise nylon 6) films produced following various physical treatments is investigated by means of thermal analysis, X-ray diffraction, and infrared spectroscopy. A recently published procedure for treating infrared spectra of multicomponent compounds without a priori knowledge o…
Oligo(ethylene glycol) (O-EG(n))-terminated alkanethiol surface-assembled monolayers (SAMs) have been reported to demonstrate protein-resistant properties similar to those of poly(ethylene glycol) (PEG). In this study, we compared the relative protein resistance of short and long ethylene oxide chains, SAMs of PEG 500…
At room temperature CO is adsorbed strongly on Cu+ sites (band at 2131 cm−1) whereas NO is preferably adsorbed on Cu2+ sites (band at 1882 cm−1). Coadsorption of CO and NO allows simultaneous and selective detection of both kinds of cations. This observation is used to follow the changes on the sample surface occurrin…
Tubular polypyrrole (PPy) doped with β-naphthalenesulfonic acid (β-NSA) was synthesized by a template-free method. SEM and TEM images proved the tubular morphology. It was found that the morphology of the resulting PPy-NSA was significantly affected by the concentration of β-NSA. When the concentration of β-NSA was in…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTHydrothermal Processing of High-Quality Multiwall Nanotubes from Amorphous CarbonJose Maria Calderon Moreno and Masahiro YoshimuraView Author Information Materials and Structures Laboratory Tokyo Institute of Technology 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Jap…
Methods for the preparation of II-VI, III-V, and II-V as well as other compound semiconductor nanoparticles using main group single-molecular precursors have been developed. The work involves the design and synthesis of compounds containing all the elements required within the desired nanoparticulate material. Precurs…
The full structural characterisation of the highly deintercalated LixNi1.02O2 (x ≤ 0.30) phases has been performed. The structure of the Li0.30Ni1.02O2 phase was refined by the Rietveld method. The cationic distribution was found to be identical to that of the pristine material. A study of the Li//LixNi1.02O2 system a…
We have recently developed a geometric formulation of the stress field for an interacting quantum system within the local density approximation (LDA) of density functional theory (DFT). We obtain a stress field which is invariant with respect to choice of energy density. In this paper, we explicitly demonstrate this u…
We describe direct imaging measurements of a colloidal sphere's diffusion between two parallel surfaces. The dynamics of this deceptively simple hydrodynamically coupled system have proved difficult to analyze. Comparison with approximate formulations of a confined sphere's hydrodynamic mobility reveals good agreement…