Materials Literature
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Hydroxypropylcellulose (HPC) hydrogel being a material of natural origin, combines the properties of a polymer, which make up the network, with biodegradability. In this report the effects of high energy radiation on the ether of cellulose-HPC are presented. The polymer irradiated in its solid state or in dilute aqueo…
The formation of γ‐AlON from Al 2 O 3 and AlN was investigated as a function of some of the reaction parameters, that is, temperature and time. The appearance of phases was followed in conjunction with the change in lattice parameter to reveal the reaction sequences of formation. An oxygen‐rich γ‐AlON phase formed fir…
The crystal structures of bismutite, Bi2(CO3)O2, a 3.865(2), b 3.862(2), c 13.675(6) Å, V 204.1(2) Å3, space group Imm2, Z = 2, and beyerite, CaBi2(CO3)2O2, a 3.7729(5), b 3.7742(7), c 21.726(4) Å, V 309.4(1) Å3, space group Immm, Z = 2, have been refined to R indices of 0.0206 and 0.0145 on the basis of 184 and 258 u…
A four-pad 3ω method was developed for determining the thermal conductivity of bulk and thin film materials. The heat conduction in the sample geometry was investigated by numerical simulation employing the finite volume technique. As a result, the conditions (i.e., sample geometry, frequency range) can be predicted w…
New poly(butylene succinate) (PBS)/layered silicate nanocomposites have been successfully prepared by simple melt extrusion of PBS and octadecylammonium modified montmorillonite (C18-mmt) at 150 degrees C. The d-spacing of both C18-mmt and intercalated nanocomposites was investigated by wide-angle X-ray diffraction an…
Liquid n-decane, n-undecane, n-dodecane, and n-hexadecane formed tiny symmetrical droplets on a partially wettable cylindrical fiber. When a temperature gradient was created along the fiber, the droplets began to move along the fiber toward the cold region. An explanation of the phenomenon is related to the thermocapi…
The characteristics of an end-member formula are defined as follows: (1) the chemical formula must be fixed; no variable chemical components are possible; (2) the end-member formula must be compatible with the crystal structure of the mineral (or putative mineral); (3) the chemical composition at each site in the crys…
In this paper the formation and annihilation of defects produced in Si nanocrystals (nc) by ion-beam irradiation are investigated in detail. The luminescence properties of Si nanocrystals embedded in a ${\mathrm{SiO}}_{2}$ matrix were used as a probe of the damaging effects generated by high-energy ion-beam irradiatio…
A novel concept is proposed: the use of shape memory alloy (SMA) to reduce panel thermal deflection and flutter responses. SMA has a unique ability to recover large pre-strains completely when the alloy is heated above the austenite finish temperature A f . The transformation austenite start temperature A s for nitino…
Single-walled carbon nanotubes (SWNTs) are ideal systems for investigating fundamental properties in one-dimensional electronic systems and have the potential to revolutionize many aspects of nano/molecular electronics. Scanning tunneling microscopy (STM) has been used to characterize the atomic structure and tunnelin…
RATIONALE AND OBJECTIVES: An important characteristic of targeted contrast agents is how they are tolerated in a biologic environment and their localization in the surrounding tissues in addition to target tissue. We evaluate the biodistribution of a gadolinium Gd 153-folate-dendrimer in high affinity folate-receptor…
In this contribution we introduce a new apparatus combining high-resolution photoelectron spectroscopy and supersonic molecular beam techniques designed to follow simple surface reactions like adsorption, desorption or oxidation in situ in a time- and temperature-resolved manner. Using high brightness synchrotron radi…
Cyclic polarization (CYP) experiments were performed on reinforcing steel bars of various surface finishes in chloride-containing alkaline solutions (pH 11.6 ~ 13.6). Pitting initiation was observed at potentials below the oxygen evolution potential (EOE) when the solution [Cl–]/[OH–] ratio (CR) was high enough. The p…
This communication reports on the preparation and electric properties of dense nanocrystalline ZnO ceramics. By spark plasma sintering, nanocrystalline (∼100 nm) ZnO ceramics with a high density of 98.5% were obtained at a very low temperature of 550°C. Electric property measurement revealed a novel conduction nonline…
AIMS: To optimize the nutritional and environmental conditions for growth of and poly-beta-hydroxybutyrate (PHB) accumulation in Bacillus mycoides RLJ B-017. METHODS AND RESULTS: An isolate, identified as B. mycoides, was grown on different sources of carbon and nitrogen. Among these, sucrose, beef extract and di-ammo…
This review deals with the current status of newly developed pendant-type PEG-immunoliposomes (Type C), carrying monoclonal antibodies or their fragments (Fab') at the distal ends of the PEG chains. In terms of target binding of Type C, two different anatomical compartments are considered. They are mouse lung endothel…
We present a method for the calculation of the local electric field at the surface of a nanoscopic emitting structure. The method is here applied to carbon nanotubes (NT) where symmetry makes the application of the method easier. The NT is simulated as a cylindrical array of touching spheres, each sphere representing…
A unified approach to the analysis of the mechanisms that lead to the edge reconstruction of graphite and growth of a variety of non-planar graphitic structures, such as nanotubes, is suggested. Transmission electron microscopy (TEM) shows that nano-arches are formed on the edge planes of natural and synthetic graphit…
The preparation of LaCuOS1−xSex solid solutions (x=0.0, 0.25, 0.5, 0.75, and 1.0) was attempted to control their energy gap and band edge emission energy. X-ray diffraction analysis revealed that the lattice constant of LaCuOS1−xSex increased linearly with increasing x, indicating the formation of a complete solid sol…
Abstract The rate constants of epoxidation were determined by reacting formic acid with a number of oils, pure TAG, and pure FAME. These results showed that FA composition had a significant effect on the value of the rate constant. In TAG, the double bonds of oleic acid and linoleic acid were equally reactive, and the…