Materials Literature
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In comparison with the original determination based on Weissenberg film data [Khan et al. (1970 ▶). Acta Cryst. B26, 1889-1892], the current redetermination of diammonium hydrogenarsenate(V) reveals all atoms with anisotropic displacement parameters and all H atoms localized. This allowed an unambiguous assignment of…
Abstract The structural formation of polymer–nanoparticle composites (PNC), which are also called polymer spherical brushes, is investigated by Monte Carlo simulations. Based on an osmotic model, the solid–liquid transition of PNC systems due to the steric effect between PNCs is studied by employing the Lindemann crit…
The crystal structure of the title compound, DyNi(3), was redetermined from single-crystal X-ray diffraction data. In comparison with previous studies based on powder X-ray diffraction data [Lemaire & Paccard (1969 ▶). Bull. Soc. Fr. Minéral. Cristallogr.92, 9-16; Tsai et al. (1974 ▶). J. Appl. Phys.45, 3582-3586], th…
Satellite Low Noise Block-down convertors (LNBs) have been evaluated for use in amplitude and intensity interferometry. LNBs have been found to have a high performance to cost ratio which is beneficial for any sensor system. They are investigated here for a diversity of applications from the derisking of subsystems fo…
The Zn(II) ion in the title compound, [Zn(C(24)H(28)N(2)O(6))](n), is located on a twofold rotation axis and is at the midpoint of a crown-4 moiety of 3,3'-[(1,7-dioxa-4,10-diaza-cyclo-dodecane-4,10-di-yl)bis-(methyl-ene)]dibenzoate anion. It is octahedrally coordinated by two N atoms and two O atoms of the crown moie…
INTRODUCTION: The E 1450 sodium salt of starch octenylsuccinate which exhibits emulsifying properties is used as food additive and is also recommended as yolk replacer in the process of mayonnaise production. Commercial E 1450 preparations reveal excellent functional properties in mayonnaise production. However, sodiu…
General results on the existence of mountain pass scenarios and heteroclinic orbits for the steady states of the thin-film type equations are present. Applied to the special case f ( h ) = h q , they provide analytic justifications to some known numerical results. The dynamics of the thin film for q ∈ (1, 3) is descri…
An equiatomic PrGe single crystal was grown by the Czochralski pulling method. The grown single crystal was found to have CrB-type orthorhombic crystal structure with the space group Cmcm (no. 63). Transport and magnetization data reveal large anisotropy in the electrical resistivity, magnetic susceptibility and magne…
Wicking or spontaneous imbibition is the suction of a liquid into a porous medium due to the negative capillary pressure created at the liquid-air interfaces. The capillary pressure arises as a result of wetting the surface of the solid particles by the invading liquid that causes a change in the surface energy of the…
Aluminum gallium nitride (AlGaN)-based devices are attractive candidates for integration into future Air Force communication and sensor platforms, including those that must operate in harsh radiation environments. In this study, the electrical and optical properties of 1.0 MeV electron irradiated n-AlxGa1-xN are chara…
Abstract The fabrication of large ZSM-5 bulk bodies by a hydrothermal method was investigated. The results reveal that porous ZSM-5 bulk bodies with sizes of the order of centimeters could be prepared by the one-pot hydrothermal method using raw materials for synthesizing ZSM-5 powder. Machinability tests and mechanic…
Emil Zolotoyabko's book is an excellent textbook for courses on both geometric/structural and physical crystallography. There are approximately 300 pages with nearly 200 illustrative color figures and an index. The recommended list for general reading comprises references to 17 relevant and well known books as well as…
A novel compact band-pass filter (BPF) with radial stubs (RS) utilizing modified composite-right/left-handed (CRLH) structure is proposed. A pair of microstrip RS is loaded as a combination of inductance and capacitance, which creates a transmission zero at the upper stop band. By introducing the magnetic coupling to…
Epitaxial lateral overgrowth (ELO) a-plane GaN samples were successfully grown on masked sapphire (11̄02) substrates using an in-situ carbonized photoresist (PR) mask by a metalorganic chemical vapor deposition (MOCVD) method. The PR masks for the ELO process were prepared using conventional lithography in the form of…
The crystal structure of durangite, ideally NaAl(AsO(4))F (chemical name sodium aluminium arsenate fluoride), has been determined previously [Kokkoros (1938). Z. Kristallogr.99, 38-49] using Weissenberg film data without reporting displacement parameters of atoms or a reliability factor. This study reports the redeter…
A phytochemical investigation of the stem bark of Diospyros cuneata (Ebenaceae) together with in vitro cytotoxic evaluation of the pure compounds in four human cancer cell lines KB, Hep-2, HeLa and SiHa led to the isolation of plumbagin, elliptinone, lupeol, atraric acid methyl ester, maritinone, betulin and betulinal…
The interatomic C(6) dispersion coefficients in crystalline and amorphous SiO(2) and ZrO(2) structures were obtained with the approach proposed by Silvestrelli (2008 Phys. Rev. Lett. 100 053002) and based on the use of maximally localized Wannier functions (MLWFs) for partitioning the electron density. Localization of…
This article presents a new direct patterning technique in which laser photoreduction of silver from a liquid is controlled by a scanning atomic force microscope tip. Contrary to expectations, the tip suppresses, rather than enhances, deposition on the underlying substrate, and this suppression persists in the absence…
Minireaktoren: Mithilfe eines Tensids wurden nanometergroße Domänen aus Polyethylenglycol (PEG) in inversen Micellen dispergiert, die in überkritischem CO2 gebildet wurden. Größe und Eigenschaften dieser PEG-Domänen können durch Änderung des PEG-Gehalts kontrolliert werden. Außerdem wurden sie als Nanoreaktoren für di…
Using atomically and momentum resolved scanning tunneling microscopy and spectroscopy, we demonstrate that a two-dimensional (2D) √3 × √3 semiconducting Ga-Si single atomic alloy layer exhibits an electronic structure with atomic localization and which is different at the Si and Ga atom sites. No indication of an inte…