Materials Literature
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We experimentally demonstrate over 2 orders of magnitude increase in the room-temperature coherence time of nitrogen-vacancy centers in diamond by implementing decoupling techniques. We show that equal pulse spacing decoupling performs just as well as nonperiodic Uhrig decoupling and also allows us to take advantage o…
Kinetic equation (k. e.) of CaCO3 precipitation from calcium-hydrocarbonate systems (CHCS) has been formulated. The form of k.e. and the processes in CHCS depends upon pH within 6<pH<9.5 k. e. is expressed by bicarbonate index. It has been shown that the process of total crystallization from beginning to the end is co…
Syntactic foams, renowned for their low density and high mechanical properties, are enjoying continuing growth in various civilian and military sectors. However, like laminated composites, foam cored structures are vulnerable to impact damages and suffering from inabilities in repairing macro-scale cracks. A self-heal…
Microsphere systems with the ideal properties for bone regeneration need to be bioactive, and at the same time possess the capacity for controlled protein/drug-delivery; however, the current crop of microsphere system fails to fulfill these properties. The aim of this study was to develop a novel protein-delivery syst…
酞菁(phthalocyanine)及其金属配合物是一类性能良好的多功能材料, 在许多领域都有着重要的应用潜力. 由于酞菁母体大环: 四氮杂卟啉(porphyrazine)及其金属配合物具有紧稠的大环结构和可离域化的共轭π-电子体系, 因而近年来人们开始对酞菁外侧的苯环进行各种化学修饰来调节此类物质的物理化学性质. 本文工作主要集中于研究给电子噻吩杂环取代酞菁外侧苯环后产生的影响, 为今后的实验和理论研究提供依据. 本文利用密度泛函理论(DFT)和含时密度泛函理论(TD-DFT)中的B3LYP方法, 在6-31G(d)基组水平上, 对无金属四噻吩[2,3-b]四氮杂卟啉(TTPPzH2)及其镁配合物(TTPPzMg)的结构和性质进…
Τη δεκαετία του '80, η έρευνα σχετικά με τις ηλιακές κυψέλες πυριτίου άρχισε να αποδίδει, με αποτέλεσμα τη βελτίωση της απόδοσής τους: το 1985 τα ΦΒ πλαίσια πυριτίου άγγιξαν απόδοση 20%. Μέσα στην επόμενη δεκαετία, η «ηλιακή» βιομηχανία παρουσίασε σταθερό ποσοστό αύξησης, ανάμεσα στο 15 - 20%, ενώ το 1997 η ανάπτυξή τ…
Based on a diode coupled silicon carbide field effect transistor with platinum as catalytic gate material, the influence of dynamic temperature modulation on the selectivity of GasFETs has been investigated. This operating mode, studied intensively for semiconductor gas sensors, is applied for the first time with gas…
O dimensionamento de pilares mistos e uma atividade comum na rotina dos engenheiros de estruturas. Porem, no que tange a analisar estes elementos a situacoes de incendio, propriamente dito, o assunto passa a ser um tanto quanto diferente no cenario da engenharia civil brasileira. O enfoque deste trabalho e avaliar par…
The features of precipitating reaction of fluoride have been examined by employing waste gypsum as a precipitant. The major component of waste gypsum was examined to be CaO with minor components of SO3, SiO2. In the experimental condition, the precipitating reaction of fluoride progressed rapidly within a few minutes…
As the price of the noble metal used in Three-way catalyst (TWC) rise, the need to develop low cost materials to substitute the noble metal became eminent. We focused our research on developing substitute material for Rh to reduce the overall cost of TWC. Since latter part of the 2009, we investigated NO decomposition…
Various types of steel, namely, 0.35C, 0.2C-Cr, and 0.2C-Cr-Mo steels, were quenched and tempered by high-frequency induction heat treatment. The type, size, and spheroidization of the carbides varied depending on the tempering temperatures (450~720℃). During the tempering process, the carbide was precipitated in the…
The most common shape-memory polymers are those in which the shape-recovery is thermally-induced. A body made from such a material may be subjected to large deformations at an elevated temperature above its glass transition temperature θg . Cooling the deformed body to a temperature below θ g under active kinematical…
How they found out about UW-River Falls as an
Microstructures and grain growth behaviors at elevated temperatures have been investigated for extruded Mg-2%Zn and Mg-2%Zn-0.3%Zr alloys, in order to clarify the role of Zr in grain stability of Mg-Zn alloy. The grain size of Zr-free alloy increased continuously with an increase in annealing temperature, when isochro…
Studies on the rate of release of silver ions from ethylene polyterephthalate (PET) fibers, which had earlier been grafted with acrylic or metacrylic acid and then impregnated with silver nitrate, into a 0.01% aqueous solution of nitric acid has been presented. The results confirm, that the Ag+ ions are released gradu…
"GUEST EDITORIAL." Advances in Applied Ceramics, 109(8), p. 445
A study was made of the effect of electrothermopolarisation on the mechanical and electric strengths of polypropylene and polyethylene modified with additions of low-molecular-weight dyes. It was shown that, with increase in the strength of the polarisation electric field Ep, the mechanical and electric strengths of t…
This research evaluates the changes in the comfort-related properties of high-density fabric, such as moisture permeability and waterproofness, in order to assess the relative importance of laundry conditions for clothing properties after repeated laundering and suggest the best laundering conditions for high-density…
Plastics Engineering is the official publication of the Society of Plastics Engineers (SPE). We provide plastics professionals with a wealth of information about machinery, technological advances, materials innovations, sustainability, and more.
An examination is made of the effect of synthetic tanning agents on the colloid-chemical properties of non-ionogenic dispersions of polymers when the latter are used in the production of fibroporous composite materials.