Materials Literature
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Research on functional materials is one of the hot technology-related topics. Isobenzofurans and Schiff bases are important building blocks for functional materials. In this study, fundamental aspects of hybrid structures were studied based on B3LYP calculations. The results confirm that fused ortho-amino Schiff bases…
Abstract : High intensity focused ultrasound (HIFU) has been combined with a Rose Bengal derivative (RB2) to provide a synergistic cytotoxicity requiring the presence of both ultrasonic cavitation and drug. In vitro tests have shown that a short treatment (less than 30s) of pulsed HIFU with power sufficient for cavita…
Abstract The identification of the free point in drill collars, drillpipe, tubing, or casing is critical for successful drilling recovery or abandonment operations. A new logging tool, available in the wireline service sector, has been developed and field tested that will help to cost-effectively identify a free point…
The low-temperature heat capacity of 2-thiopheneacetic acid was measured in the temperature range from 78 to 343 K with a high precision automated adiabatic calorimeter. No phase transition or other thermal anomaly was observed in the temperature ranges of 78 similar to 314 and 337 similar to 343 K, in which the molar…
Abstract GDF SUEZ and Sonatrach will develop in partnership the main fields of the prolific Sbaa basin, SW Algeria. In this area, the main gas reservoir is composed by the glaciogenic Upper Ordovician, which exhibits high poroperm heterogeneities, with porosity and permeability ranging from 1 to 15% and 10−3 to 103 md…
A study has been made of the leaching process to remove iron oxides from quartz presented in kaolin washing plant tailings. The tailings mineralogical constituents were quartz, clay minerals, hematite, and calcite. The leaching rate of Fe2O3 increased with increasing acid concentration, temperature, reaction time, and…
A portable magnetic separator was proposed for in-vivo biomedical applications. In this prototype design, a matrix of alternating, parallel magnetizable wires, and biocompatible tubing is immersed into an externally applied magnetic field. The wires are magnetized and high magnetic fields as well as field gradients ar…
Quantum chemical parameters such as LUMO energy, HOMO energy, ionization energy (I), electron affinity (A), chemical potential ( μ ), hardness ( η ) electronegativity ( χ ), philicity ( ωα ), and electrophilicity ( ω ) of a series of aliphatic compounds are calculated at the B3LYP/6-31G(d) level of theory. Quantitativ…
The adsorption of CO and N2 in ZSM-5 with different SiO2/Al2O3 ratio has been investigated both by static volumetric measurements and dynamic adsorption study. The adsorption capacity of CO and its selectivity over N2 decreases with an increase in the SiO2/Al2O3 ratio. ZSM-5 (25) showed highest selectivity for CO over…
Poly(ether–block–amide) (Pebax 2533) membrane was synthesized on a poly(vinylidene fluoride) (PVDF) ultraporous substrate to study the separation of synthetic ethylene glycol/water and ethanol/water mixtures by pervaporation. The membrane was characterized by FTIR spectroscopy, DSC, SEM, and XRD to assess intermolecul…
Our recent studies on the synthesis, structures, and aromaticity of phosphole-containing porphyrins and their metal complexes are summarized. Core-modified P,X,N2-porphyrins (X = S, N) are accessible from a σ4-phosphatripyrrane and the corresponding 2,5-difunctionalized heteroles in a few steps. X-ray structural analy…
A membrane based treatment strategy was developed for the possible recycling of rinsing wastewater from indigo dyeing to the process itself. Performances of three different nanofiltration (NF) (NF 270 and NF 90, Dow Film Tech, USA and NF 99, Alfa Laval, Denmark) and two different reverse osmosis (RO) (HR 98 PP and CA…
The search for molecular receptors capable of forming stable associates with fullerenes is a very active field of research in fullerene chemistry, with the purification from fullerite and the self-assembly of nanoscale electronic devices as driving forces. The construction of bivalent, tweezer-like receptors featuring…
Nanoparticles are widely used in nanomedicines, including for targeted delivery of pharmacological, therapeutic, and diagnostic agents. Since nanoparticles might translocate across cellular barriers from the circulation into targeted organs, it is important to obtain information concerning the pathophysiologic effects…
Nanomaterials, including single-walled carbon nanotubes (SWCNT), are being developed for a variety of commercial products. However, adverse health effects attributed to these new materials are not well understood. Recent reports showed that exposure of mice to dispersed SWCNT (DSWCNT) produced a rapid and progressive…
In this study, mesoporous MCM-41 has been modified by the incorporation of zirconium ion as a rapid, simple, and inexpensive method for modification. The adsorbent is characterized using powder X-ray diffraction and nitrogen adsorption-desorption isotherm data. The distribution coefficient of molybdenum ion on the mes…
The aim of this paper is to present a self contained introduction to the Hubbard model and some of its applications.The paper consists of two parts: the first will introduce the basic notions of the Hubbard model starting from the motivation for its development to the formulation of the Hamiltonian,and some methods of…
Hard X-ray and extremely low energy bulk-sensitive photoelectron spectroscopy has been performed in the temperature range of 100-330 K for Fe3O4. In the high temperature phase just above the Verwey transition, the intensity at the Fermi level (EF) is still negligible, but it increases gradually with further increasing…
Carbon nanotubes (CNT), since their discovery, have become one of the most promising nanomaterials in many industrial and biomedical applications. Due to their unique physicochemical properties, interest is growing in the manufacture of CNT-based products and their subsequent marketing. Since their discovery, the pros…
Engineered nanoparticles (NP) are being developed and incorporated in a number of commercial products, raising the potential of human exposure during manufacture, use, and disposal. Although data concerning the potential toxicity of some NP have been reported, validated simple assays are lacking for predicting their i…