Materials Literature
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Petroleum contamination is a widespread and well-recognized global environmental threat to human health and ecosystems. Haloarcula sp. IRU1 was cultivated axenically in synthetic liquid media with crude oil as sole carbon and energy source. After 5 days' incubation, cell dry weight (CDW) and poly (3-hydroxybutyrate) (…
Pitch emulsions were prepared to mimic the colloidal wood resin system in paper mill process waters. The phase distribution of resin and fatty acids (RFAs) between the colloidal lipophilic droplets (l) and the water phase (w) were determined as pKlw values. The effect of triglyceride to RFA ratio on pKlw values was st…
Summary This paper reports a challenging and unique scale-forming environment in northern Alberta, Canada. Calcite was forming on the fire tubes in a series of treaters. Bulk fluid temperature was 110°C, but skin temperature of the fire tubes was in excess of 450°C. This created an extremely high scaling potential. Th…
In this article, the self-assembly of polyamines as a facile approach to fabricate permeability tunable polymeric shells for encapsulation of relatively low molecular weight (LM(w)) hydrophilic biomacromolecules (M(w) ≈ 4000 Da) is presented. The entire process is performed in organic solvents within 2 to 4 h to allow…
Glycerol is often used to protect proteins while stored frozen, to enhance their solubility and as a cryosolvent in cryocrystallography, but less so in protein crystallization, probably because it presents problems during screening. Understanding how glycerol affects protein crystallization is important for manual and…
Density functional theory (DFT) calculations were carried out in a study of the mechanism of benzene oxidation by N 2 O to phenol over an extra framework dimeric [FeOFe] 2+ species in ZSM-5 zeolite represented by a [Si 6 A l2 O 9 H 14 (Fe(μ-O)Fe)] cluster model. The catalytic reactivity of such a binuclear species is…
Three different carbons were prepared from rice husk by steam activation at 700 ºC, H3PO4-activation followed by desilication or desilication followed by H3PO4-activation at 500 ºC. Honeycomb monoliths were obtained by mixing of a carbon with montmorillonite followed by extrusion, curing, calcination and leaching by a…
Complex nanostructures such as branched semiconductor nanotetrapods are promising building blocks for next-generation nanoelectronics. Here we report on the electrical transport properties of individual CdS tetrapods in a field effect transistor (FET) configuration with a ferroelectric Ba(0.7)Sr(0.3)TiO(3) film as hig…
In this paper, we demonstrate a controllable optical activity emerging as electric-field-dependent circular dicroism (CD) and optical rotatory dispersion (ORD). Such controllable optical activity may offer fascinating possibilities for the production of novel optical materials/devices. The result also supports our pre…
Abstract The effect of γ‐rays sterilization at ambient (23°C) and at dry ice temperatures (−78°C) on two biodegradable semicrystalline polyesters, namely poly( L ‐lactide) (PLLA) and poly(ε‐caprolactone) (PCL), was studied. The radical processes generated by irradiation were investigated by electron paramagnetic reson…
The colour of electrochromic fabric, and its colour transitions, was explored on the basis of variations in underlying fabric colour. A complete understanding of this phenomenon is essential for the fabric’s use in full-colour wearable displays or other applications. Previous work in this area utilised only white-colo…
Featherlike PbTe dendrites were synthesized via a simple potentiostatic electrochemical deposition method at room temperature, employing Pb(NO 3 ) 2 and Na 2 TeO 3 as the precursors and tartaric acid as capping molecule. PbTe dendrites were deposited at the potential of −0.2 V for 5 min. This experiment was against th…
We present a novel method for producing metamaterials with a terahertz magnetic response via fiber drawing, which can be inexpensively scaled up to mass production. We draw a centimeter preform to fiber, spool it, and partially sputter it with metal to produce extended slotted resonators. We characterize metamaterial…
We devise future-oriented technology analyses tools to investigate a technology at an interesting development stage of early emerging applications. At this stage, technologies show great potential with little established commercialisation. Future development pathways are highly uncertain and heavily dependent on conte…
Ordered CdSe nanowire branched arrays were designed and synthesized while merging two particular structural features within a single nanomaterial. This novel CdSe nanostructure combines a branched structure and ordered single-crystalline character. The stems and branches consist of wurtzite CdSe single crystals. When…
It has been argued that the electron-hole puddles formed on graphene are mostly due to substrate-induced charged impurities [J. Martin et al., Nature Phys. 4, 144 (2008), Y. Zhang et al., Nature Phys. 5, 722 (2009)]. Here, using first-principles ab initio calculations, we show that the existence of ripples and electro…
BACKGROUND: The substitution of plastics based on fossil raw material by biodegradable plastics produced from renewable resources is of crucial importance in a context of oil scarcity and overflowing plastic landfills. One of the most promising organisms for the manufacturing of medium-chain-length polyhydroxyalkanoat…
Elution chromatography through columns packed with agarose beads has been used to separate metallic from semiconducting single-wall carbon nanotubes (SWCNTs). Prior studies have attributed the separation to either selective adsorption or size-exclusion (due to selective aggregation) of semiconducting SWCNTs. Initial S…
We report a facile approach to preparing binary mixed polymer brushes and free-standing films by combining the layer-by-layer and surface-initiated polymerization (LbL-SIP) techniques. Specifically, the grafting of mixed polymer brushes of poly(n-isopropylacrylamide) and polystyrene (pNIPAM-pSt) onto LbL-macroinitiato…
Micrometer- and submicrometer-scale surface roughness enhances osteoblast differentiation on titanium (Ti) substrates and increases bone-to-implant contact in vivo. However, the low surface wettability induced by surface roughness can retard initial interactions with the physiological environment. We examined chemical…