Materials Literature
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The novel nanocomposite based on poly(carbonate-urea)urethane and polyhedral oligomeric silsesquioxanes (POSS) has been used in medicine especially in cardiovascular applications. It is also known that the cell affinity towards biomaterials can be promoted by immobilization of extracellular matrix proteins onto these…
Gut behütet: Peptide, die auf der Oberfläche von mesoporösen Silicat-Trägern verankert wurden, fungieren als „Torwache“. Auf diese Weise werden absolut dichte Transportmaterialien erhalten, die die Ladung erst in Gegenwart einer passenden Peptidase selektiv freisetzen (siehe Bild, rote Kreise: Ladung, bunte Ketten: Pe…
Proton exchange membrane (PEM) fuel cells have attracted grate attention in recent years as a promising replacement for traditional engines. The performance of PEM fuel cells is known to be influenced by many parameters such as operation temperature and humidification of the gas streams. In this work, a testbench was…
The load-bearing capacity of today's tissue-engineered (TE) cartilage is insufficient. The arcade-like collagen network in native cartilage plays an important role in its load-bearing properties. Inducing the formation of such collagen architecture in engineered cartilage can, therefore, enhance mechanical properties…
We designed and manufactured a multi-degree-of-freedom (MDoF) ultrasonic motor (USM) by using a single actuator. Although there have been numerous MDoF USMs reported in the literature, only a few of them cover the combined rotary and translational motions in a cylindrical-joint type configuration. Combining these two…
In the present paper, synthesis of hydroxyapatite (HAp) powder from eggshell waste is produced through wet precipitation process at 50–55°C. The thoroughly washed and dried eggshell powder is treated with dilute nitric acid followed by diammonium hydrogen phosphate under controlled reaction conditions such as pH, temp…
Southern mixed hardwood chips were extracted with alkaline solutions at different chemical charges, times (45-110 min), and temperatures (125°C-160°C). At high alkali charges (10% and 20% sodium hydroxide [NaOH] as sodium oxide [Na2O]), the extract was strongly alkaline (pH about 13) and 17%-40% of the wood was dissol…
A broadly based investigation of the effects of a diverse array of substituents on the photochemical rearrangement of p-hydroxyphenacyl esters has demonstrated that common substituents such as F, MeO, CN, CO2R, CONH2, and CH3 have little effect on the rate and quantum efficiencies for the photo-Favorskii rearrangement…
OBJECTIVE: To evaluate the potency of carboxymethyl chitosan-2, 2' ethylenedioxy bis-ethylamine-folate (CMC-EDBE-FA) on tissue injury, antioxidant status and glutathione system in tissue mitochondria and serum against nicotine-induced oxidative stress in mice. METHODS: CMC-EDBE-FA was prepared on basis of carboxymethy…
In this work, adhesive wear and frictional characteristics of thermoplastic treated kenaf fibre-reinforced polyurethane (T-KFRP) is investigated. The T-KFRP composite was tested against stainless-steel counterface using a block-on-disc apparatus. The effects of applied loads and sliding distance on the wear and fricti…
PURPOSE: To investigate physical and biophysical properties of proton tracks 1 keV-300 MeV using Monte Carlo track structure methods. MATERIALS AND METHODS: We present model calculations for cross sections and methods for simulations of full-slowing-down proton tracks. Protons and electrons were followed interaction-b…
We report on a direct comparison of the depth and lateral resolution of the current state-of-the-art laser-assisted atom probe microscopy analysis of single-crystalline silicon. The isotopic heterostructures composed of 5–15 nm-thick S28i- and S30i-enriched layers were measured to reconstruct three-dimensional images…
Synthesis of nanoparticles of TiO 2, Pt, CdS, and their binary and ternary combinations were made on zeolite Y starting from molecular precursors that are ion exchanged into the zeolite. Nanoclusters of TiO 2 in the anatase form were formed from titanyl ions at low loadings of Ti (1 per 2.5 supercages). CdS (hexagonal…
The ground state structure and frontier molecular orbital of newly synthesized carbazole-fluorene based D-π-A organic dyes, CFP1A, CFP2A, CFP1CA, and CFP2CA, were theoretically investigated using density functional theory (DFT) at B3LYP/6-31G(d,p) level. These dye molecules have been constructed based on carbazole-flu…
A cold radio frequency oxygen plasma treatment is demonstrated as a successful route to prepare clean, well-ordered, and stoichiometric PrO(2) layers on silicon. High structural quality of these layers is shown by x-ray diffraction. So far unobserved spectral characteristics in Pr 3d x-ray photoelectron (XP) spectra o…
Comparative Molecular Field Analysis (CoMFA) is a mainstream and down-to-earth 3D QSAR technique in the coverage of drug discovery and development. Even though CoMFA is remarkable for high predictive capacity, the intrinsic data-dependent characteristic still makes this methodology certainly be handicapped by noise. I…
In this work, the thermodynamic equilibrium and applying of PEG4000/Phosphate ATPS on the purification of bromelain extracted from pineapple was studied. A rigorous study of the equilibrium curves and tie-line length from PEG4000/phosphate ATPS were done for the pH 6-11 at 25ºC. Results showed that there was augment i…
Abstract Diamond/Cu‐ x Cr composites were fabricated by pressure infiltration process. The thermal conductivities of diamond/Cu‐ x Cr ( x = 0.1, 0.5, 0.8) composites were above 650 W/mK, higher than that of diamond/Cu composites. The tensile strengths ranged from 186 to 225 MPa, and the bonding strengths ranged from 4…
A coarse-grained molecular model, which consists of a spherical particle and an orientation vector, is proposed to simulate lipid membrane on a large length scale. The solvent is implicitly represented by an effective attractive interaction between particles. A bilayer structure is formed by orientation-dependent (til…
Folding of naturally occurring proteins has eluded a universal molecular level explanation till date. Rather, there is an abundance of diverse views on dominant factors governing protein folding. Through rigorous analyses of several thousand crystal structures, we observe that backbones of folded proteins display some…