Materials Literature
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Abstract The effect of softening/decarbonisation and dosage of orthophosphate on copper corrosion was studied in pipe rigs according to the German standard DIN 50931, part 1. A literature study with regard to the effects of phosphate dosing on copper corrosion has shown that on the one hand and in most of the cases a…
In the present work, life prediction of a buried pipeline was estimated based on corrosion rates. From alternating current (AC) impedance measurements and by using a transmission line model, polarization resistance values of a buried structure were calculated with different coating defects exposed in different electro…
We have studied the properties of polaron charge carriers in a large variety of π-conjugated polymers and oligomers. We first study the optical absorption spectrum of polarons and find that the transition photon energy of the so-called low-energy transition obeys a universal relationship depending only on the oligomer…
The micro-geometry of three-dimensional (3-D) braided tubular preform is more complex than that of rectangular one, and it is more difficult to analyze its architecture and mechanical properties theoretically as well. Through the advantage of digital element approach for textile technology, 3-D circular braiding proce…
Rough samples with topography on a scale that is much greater than the micrometer dimensions of the electron interaction volume present an extreme challenge to quantitative electron beam x-ray microanalysis with energy-dispersive x-ray spectrometry. Conventional quantitative analysis procedures for flat, bulk specimen…
New molecular single-source precursors for the preparation of carbon-rich random inorganic networks in the quaternary system Si/B/N/C have been synthesized and fully characterized by spectroscopic methods (infrared, nuclear magnetic resonance and mass spectrometry). As a new structural feature, the precursors contain…
Abstract The bubble deformation behavior of double bubble tubular film (DBTF) of linear low density polyethylene (LLDPE) is experimentally analyzed. Also investigated is how the bubble deformation behavior of the stretched films are changed by stretching conditions, especially stretching temperature, and how the prope…
The mechanical properties of needle-punched nonwoven fabrics depend on the fiber entanglement effected by the needles. The needle barbs catch the fibers during punching and lead them into the thickness direction, creating fiber-to-fiber entanglement. In this research, we propose a method to estimate the number of fibe…
The results of research on the plasticity and strength of a wide class of metal oxide perovskite-like compounds which have the property of high-temperature superconductivity or which can be used as base compounds for making high-temperature superconductors (HTSCs) are systematized and presented from a unified point of…
Abstract Stretchability and properties of linear low density polyethylene (LLDPE) blends for biaxially oriented film was investigated in the previous report [1]. That report focused on changing the film density by blending three different densities of LLDPE. The relationship among stretchability, film density and the…
Literature reports on bulk sample of the ferrite Ni 0 . 5 Co 0 . 5 Fe 2 O 4 confirm a complete inverse spinet structure. On site occupancy and magnetic anisotropy on nano-particle samples of the titled ferrite prepared usingtwo different routes - a wet chemical co-precipitation process and sol-gel method have been stu…
Abstract A study of gas‐liquid reactive crystallization for CO 2 ‐BaCl 2 ‐H 2 O system was performed in a continuous flow crystallizer. The influences of mixing on the crystallization kinetics of barium carbonate crystals were investigated. The mixing parameters are stirrer speed, feed concentration, gas‐flow rate, pH…
In histidine biosynthesis, histidinol-phosphate aminotransferase catalyzes the transfer of the amino group from glutamate to imidazole acetol-phosphate producing 2-oxoglutarate and histidinol phosphate. In some organisms such as the hyperthermophile Thermotoga maritima, specific tyrosine and aromatic amino acid transa…
The effect of iron content on crystallization of a mica glaze as coating for fast firing stoneware substrates has been investigated. Measurements by differential thermal analysis (DTA) combined with X‐ray diffraction (XRD) and scanning electron microscopy (SEM) have shown the development of preferential crystal orient…
A physical model is proposed for a single CdSe nanocrystal coated with a ZnS shell which can explain the power-law statistics of its experimentally observed intermittent photoluminescence. If the localized electron-hole pairs (excitons) form in the nanocrystal, this suggestion alone will suffice to explain why the on-…
To prepare self-reinforced sisal composites, sisal fibers were cleaned, treated with NaOH solution, and then benzylated with benzyl chloride. In this way, the skin layers of the fibers were converted into thermoplastic material while the core of the fiber cells remained unchanged. Under the circumstances of hot pressi…
Novelty of the synthesis method is the use of alumina hydroxides with very low initial density ~0.02 g/cm 3 . This porous alumina monolith (PAM) is obtained first by active oxidation of aluminum in a humid atmosphere through a liquid mercury layer. Then, in the second step, a thermal treatment of PAM between 1000 and…
Properties of self-organized SiGe quantum dots formed for the first time by ion implantation of Ge ions into Si are studied using Auger electron spectroscopy, atomic-force microscopy, and scanning electron microscopy. It is found that a spatially correlated distribution of Ge atoms is observed in Si layers implanted w…
Abstract The Raman spectra of D ‐penicillamine in H 2 O and D 2 O were recorded under different acidity conditions, together with the respective SERS spectra on silver colloids. Vibrational assignments of the spectra obtained are proposed. The analysis of the SERS spectra shows that two of the conformers of D ‐penicil…
Abstract In our efforts of finding new specific contrast agents of higher relaxivity and selectivity, we have prepared the two new benzyl‐functionalized DTPA (‘diethylenetriamine pentaacetate’) gadolinium complexes ( S )‐ 3 and ( R , S )‐ 4 , and compared their properties with those of the known regioisomers ( S )‐ 2…