Materials Literature
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The electronic structure and optical properties of the complex hydrides Ca2FeH6, Ca2RuH6, Mg2FeH6, Mg2RuH6, Sr2FeH6, Sr2RuH6 and Sr2OsH6 were studied using first-principles calculations. Optical spectra of the hydrides were compared with those of SiN x , In2O3 and ZnO determined from theoretical calculations and measu…
Abstract The investigations on the formation of mixed crystals of ammonium dihydrogen orthophosphate (ADP) and potassium dihydrogen orthophosphate (KDP) i.e. potassium ammonium dihydrogen phosphate, K 1‐x (NH 4 ) x H 2 PO 4 have been presented in this paper. Pure and mixed crystals of ADP and KDP have been grown by sl…
In this paper we discuss and interpret the results of shear bond strengths achieved after the use of two silane coupling agents with isocyanato functionality, viz. 3-isocyanatopropyltrimethoxysilane and 3-isocyanatopropyltriethoxysilane. The silanes were used alone and also blended with a non-functional cross-linking…
We have synthesized monodisperse “hairy rod oligomers” based on oligo( p -benzamide)s carrying alkyl side chains and conjugated them with polydisperse poly(ethylene glycol) (PEG) chains. The well-defined oligomers were synthesized from 4-amino-2-hexyloxybenzoic acid using a commercial peptide synthesizer. The PEG conj…
This study compares the effects of hollow polymeric microspheres (PHMS) on specific mechanical properties and thermal properties of glass, basalt, and carbon woven fabric reinforced vinyl ester composites. The specific flexural and specific impact strengths of the composites were marginally increased with the addition…
Detailed similarities between polarization states of light and ballistic charge carriers in graphene are derived. Based on these, the optical equivalent of quantum wavefunctions, the Dirac equation, and the effect of an electrostatic potential are found, and the quantum analogs of the refractive index of light and of…
Low-temperature heat capacity and oriented single-crystal field-cooled and zero-field-cooled magnetization data for the single-molecule magnet [Ni(hmp)(dmb)Cl](4) are presented that indicate the presence of ferromagnetic ordering at approximately 300 mK, which has little effect on the magnetization relaxation rates.
The effect of plasma treatments with oxygen and argon gases on some properties of polyamide 6 fibers is thoroughly investigated. The treated fabric with oxygen plasma is further treated with some metal salts solutions such as copper sulfate, nickel sulfate, and silver nitrate to study their effect on the antibacterial…
Reaction of the rigid angular ligand tetrahydroxy-9,10-dimethyl-9,10-dihydro-9,10-ethanoanthracene, hereafter LH(4), with Mn(CH(3)CO(2))(2) x 2 H(2)O in a basic aqueous medium, in air, affords a crystalline product of composition Na(12){[Mn(H(2)O)](12)L(12)} x xH(2)O. Single-crystal X-ray diffraction reveals the prese…
The microwave transmission of arrays of square patches, each rotated by 45° from the axes of the square lattice on which they are positioned, has been experimentally studied as a function of metal occupancy. At low frequencies, the microwave transmissivity drops on passing through the connectivity threshold (50 per ce…
In the search for high-temperature thermoelectric materials, two families of novel, narrow-band-gap semiconducting antimonide oxides with the compositions RE(3)SbO(3) and RE(8)Sb(3-delta)O(8) (RE = La, Sm, Gd, Ho) have been discovered. Their synthesis was motivated by attempts to open a band gap in the semimetallic RE…
Harmonic force field (FF) parameters for the active site of native azurin (AZ) have been developed using density functional theory (DFT)-based Becke's three-parameter hybrid exchange functional and the Lee-Yang-Parr correlation functional (B3LYP) method. The same computational protocol has also been applied to derive…
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Three different extract conditions (aqueous, EtOH and EtOAc) of four different parts (bracts, leaves, roots and stems) of the plant Anemopsis californica (A. californica) were evaluated for their effect on the growth and migration of human colon cancer cells, HCT-8, and the breast cancer cell lines Hs 578T and MCF-7/A…
We study the energy spectrum for the problem of graphene's carriers under perpendicular incidence of electromagnetic waves. To obtain the spectrum, we solve the Dirac equation under such a field. Then a generalized Mathieu equation is obtained. The limiting cases of strong and weak fields, as well as long and short wa…
A nonlinear thermodynamic theory is developed for the strain-mediated direct magnetoelectric (ME) effect displayed by ferroelectric-ferromagnetic nanostructures. This effect results from transmission of magnetic-field-induced deformations of a thick ferromagnetic substrate to a thin ferroelectric overlayer, where the…
The dissolution of (101̅4) calcite surfaces was investigated in the presence of 1-hydroxy ethylidene-1,1-diphosphonic acid) (HEDP) (0−10 mM) at pH = 8 using in situ atomic force microscopy (AFM). The presence of the organophosphonate resulted in a change in the appearance of the dissolution features from the typical r…
The cytostatic effects of polymeric conjugates based on N-(2-hydroxypropyl)methacrylamide copolymers (PHPMA) and containing doxorubicin bound through amide and hydrazone bonds (mixed conjugates) were compared with the cytostatic effects of monoconjugates containing drug bound through an amide or hydrazone bond. One gr…
New types of coordination polymers containing [M(TCNQ)] sheets in which the TCNQ component is present as the little known dianion TCNQ 2− are obtained in a very simple manner using readily available TCNQH 2 (i.e. 1,4-(NC) 2 CH·C 6 H 4 ·CH(CN) 2 ) as the starting material. Above and below the metal centers in the sheet…
We consider a simple Maier-Saupe statistical model with the inclusion of disorder degrees of freedom to mimic the phase diagram of a mixture of rodlike and disklike molecules. A quenched distribution of shapes leads to a phase diagram with two uniaxial and a biaxial nematic structure. A thermalized distribution, howev…