Materials Literature
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In this report, we describe a laser-latex combination system that enables membrane-impermeable molecules to penetrate cell membranes. Laser light (Q-switched Nd:YAG laser, 532.5 nm) was used to irradiate a mixture of commercial latex particles (blue dyed, 1 micro m in diameter) and mouse fibrosarcoma (Meth-A) cells. A…
We studied theoretically the interaction of simple aliphatic amines with carboxylated zigzag and armchair single-walled carbon nanotube (SWNT) models. We used single-level MM+ molecular mechanics and the AM1 semiempirical method to study noncovalent interactions. To study the model amidation reaction with methylamine,…
ABSTRACT: Films based on whey protein isolate (WPI) were formed using compression molding. Compression molded films could be formed using 30% to 50% moisture content or glycerol content WPI at 104 °C to 160 °C for 2 min. Films made from water‐WPI mixtures were brittle and insoluble and had water‐vapor permeability val…
Thin homogeneous films of the Prussian blue analogues with idealized formulas KFe III [Fe II (CN) 6 ], KNi II [Fe III (CN) 6 ], CsNi II [Cr III (CN) 6 ], and KCr II [Cr III (CN) 6 ] have been prepared through the sequential adsorption of the appropriate metal ions and hexacyanometalate complexes onto hydrophobic surfa…
In this review, the control of size and shape of inorganic nanocrystals via colloidal solution is discussed. The nanocrystals are organized in 2D and 3D superlattices with formation of ‘supra’ crystals in fcc structure. Physical properties of nanocrystals organized in mesoscopic scale are neither those of the isolated…
Fully dense, doped ZnO varistors were prepared using an easy two‐stage pressureless‐sintering method at temperatures as low as 825°C, with a grain size of ∼0.5 μm. After the highly nonohmic ZnO varistors were sintered, their fine microstructure consisted of uniformly sized grains, small spinel grains with partially di…
Nanometric ammonium aluminum carbonate hydroxide (AACH) with a particle size less than 5 nm was produced from ammonium aluminum sulfate and ammonium hydrocarbonate under an optimized adding condition, and phase transformations of the AACH on heating and the effect of α‐Al 2 O 3 seeding on the transformation kinetics w…
Abstract The size of quaternary <mml:math xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mnf="http://cambridge.org/core/manifest" xmlns:cup="http://contentservices.cambridge.org" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:m="http://cambridge.org/core/metadata" xmlns:core="http://cambridge.org/core" xmlns:c…
Abstract The soot combustion process promoted by some of the most promising diesel particulate combustion catalysts (Cs 2 O·V 2 O 5 , Cs 4 V 2 O 7 , CsVO 3 ) is discussed on the grounds of a theoretical analysis and an experimental test campaign involving reaction runs in microreactors (either in isothermal or in temp…
We show that finite-size scaling techniques can be employed to study the glass transition. Our results follow from the postulate of a diverging dynamical correlation length at the glass transition whose physical manifestation is the presence of dynamical heterogeneities. We introduce a parameter B(T,L) whose temperatu…
We present the circuit equivalent of the Landau-Khalatnikov dynamical ferroelectric model. The differential equation for hysteretic behavior is subject to numerical computer simulations. The size and shape of the simulated hysteretic loops depend strongly on the frequency and the amplitude of the driving electric fiel…
This study investigates the influence of cyclic tensile strain, applied to fully contracted fibroblast-seeded collagen constructs. The constructs were preloaded to either 2 or 10 mN. The preloaded constructs were subsequently subjected to a further 10% cyclic strain (0-10%) at 1 Hz, using a triangular waveform, or wer…
Abstract DTPA‐bisamide derivatives with alkyl chains containing 14, 16 and 18 carbon atoms were synthesized and complexes of various trivalent lanthanide ions (Ln = Gd, La, Pr, Eu) were formed. Variable temperature proton NMR spectroscopy of paramagnetic praseodymium( III ) and europium( III ) complexes revealed that…
Galactokinase plays a key role in normal galactose metabolism by catalyzing the ATP-dependent phosphorylation of alpha-D-galactose to galactose 1-phosphate. In humans, mutations in the galactokinase gene can lead to the diseased state referred to as Type II galactosemia. Here we describe the three-dimensional structur…
β-Cyclodextrin (β-CD) and γ-cyclodextrin (γ-CD) formed inclusion complexes with poly(dimethylsilane)s (PSi) of various molecular weights to give crystalline compounds. However, α-cyclodextrin (α-CD) did not form complexes with PSi of any molecular weight. The yields of the β-CD−PSi inclusion complexes decreased with i…
A brief survey of host–guest interactions involving dendritic architectures is presented. Discussion begins with an examination of early examples of branched motifs described as ‘micelle-like’ and progresses through to current investigations of unimolecular micelles and their attendant supramolecular properties.
4(R)-Hydroxyproline in the Yaa position of the -Gly-Xaa-Yaa-repeated sequence of collagen plays a crucial role in the stability of the triple helix. Since the peptide (4(R)-Hyp-Pro-Gly)10 does not form a triple helix, it was generally believed that polypeptides with a -Gly-4(R)-Hyp-Yaa-repeated sequence do not form a…
Electromigration in Cu Damascene lines with bamboo-like grain structures, either capped with Ta/TaN, SiNx, SiCxNyHz layers, or without any cap, was investigated. A thin Ta/TaN cap on top of the Cu line surface significantly improves electromigration lifetime when compared with lines without a cap and with lines capped…
Edible films based on gluten from four types of Brazilian wheat gluten (2 "semi-hard" and 2 "soft") were prepared and mechanical and barrier properties were compared with those of wheat gluten films with vital gluten. Water vapor, oxygen permeability, tensile strength and percent elongation at break, solubility in wat…
We show that the rheology of a silazane‐based precursor for a silicon carbonitride ceramic can be radically altered by reacting it with an alkoxide precursor. This modified precursor can be drawn into fibers by a simple process. The fiber‐friendly rheology of the modified precursor is ascribed to the creation of linea…