Materials Literature
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An investigation of the feasibility of in situ monitoring of polymorphic transitions is presented. Focused beam reflectance measurement (FBRM) and particle vision and measurement (PVM) are used to study changes in crystal population and morphology during the transition of the δ-polymorph of d -mannitol to the thermody…
A major cost factor of cationizing cellulose with 3-chloro-2-hydroxypropyl trimethyl ammonium chloride (CHTAC) is the reaction efficiency, which is less than perfect due to a competing hydrolysis reaction. The efficiency of the cationization reaction sequence is analyzed in terms of chemical kinetics, and experimental…
Abstract Monocrystalline LnPO 4 (Ln = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb) nanowires have been prepared in bulk quantities by a simple, facile, and clean solution‐based hydrothermal method at 220−240 °C by finely tuning the acidity of the stock solutions. The length and width of the nanowires were in the range of 1−10 μm a…
High-throughput screening is usually the method of drug-lead discovery. It is now well accepted that, for a functional assay, quality is more important than quantity. The ligand-based or protein-based NMR screening methodologies for detecting compounds binding to the macromolecular target of interest are now well esta…
Focused-ion-beam chemical vapor deposition (FIB-CVD) is an excellent technology for forming three-dimensional nanostructures. Various diamond-like-carbon (DLC) free-space-wirings have been demonstrated by FIB-CVD using a computer-controlled pattern generator, which is a commercially available pattern generator for ele…
Process development of a Bristol-Myers Squibb drug substance candidate involved the development of crystallization and particle engineering protocols to address polymorphism, oiling out, and particle size control issues. Two monotropic polymorphs were evaluated, and one was determined to be thermodynamically more stab…
The class of hydrogen-containing salts in which the phases with dynamically disordered hydrogen-bond nets are formed has been considered. Unlike other hydrogen-bonded crystals, the crystals of this class are characterized by delocalized hydrogen bonds producing considerable influence on their physical and physical-che…
Nanocrystalline powders of Ce 0.5 Zr 0.5 O 2 were synthesized and characterized for the application as a catalyst support and oxygen storage medium in automotive catalysis. Detailed pair-distribution function analysis of the neutron diffraction data revealed an unusual structure of the nanocrystallites, consisting of…
Nitrogen-doped carbon nanotubes were grown vertically aligned on the iron nanoparticles deposited on silicon substrates, by thermal chemical vapor deposition of methane/ammonia and acetylene/ammonia mixtures in the temperature range 900−1100 °C. The concentration of the nitrogen atoms has been controlled in the range…
In this contribution we present two cases of phase transitions, in which the ability to control the reproducible formation of the desired physical form requires a control of crystallization parameters and a deep understanding of the phase diagram.
Abstract Dendrimer‐protected gold nanoparticles have been facilely obtained by heating an aqueous solution containing third‐generation poly(propyleneimine) dendrimers and HAuCl 4 without the additional step of introducing other reducing agents. Transmission electron microscopy (TEM) and UV‐vis data indicate the size,…
Poly(ethylene oxide) (PEO)-brushes are generally recognized as protein-repellent surfaces, and although a role in discouraging microbial adhesion has been established for some strains and species, no study exists on the effects of PEO-brushes on a large variety of bacterial and yeast strains. In this paper, a PEO-brus…
This study was designed to clarify which vascular carrier, the arteriovenous shunt loop or the arteriovenous bundle, has more potential as a vascular carrier for an artificial skin flap in rats. An arteriovenous shunt loop was constructed between the femoral artery and vein using an interpositional artery (group I) or…
Terpolymerization of poly(ethylene glycol) (PEG), divinyl ethers, and serinol can be used to synthesize water soluble, hydrolytically labile, amino-pendent polyacetals (APEGs) suitable for drug conjugation. As these polyacetals display pH-dependent degradation (with faster rates of hydrolysis at acidic pH) and they ar…
Self-assembly of [Ag(CN)2]-, 3-cyanopyridine, and iron(II) gives triple interpenetration of three-dimensional spin crossover (SCO) networks with the NbO topology, which interact each other via argentophilic interactions. Superposition of the networks along the c-axis defines an infinite mosaic of trigonal and hexagona…
Nanotechnologies promise new means for drug delivery. ICAM-1 is a good target for vascular immunotargeting of nanoparticles to the perturbed endothelium, although endothelial cells do not internalize monomeric anti-ICAM-1 antibodies. However, coupling ICAM-1 antibodies to nanoparticles creates multivalent ligands that…
The structural behavior of Al 3+ in peralkaline glasses and melts along the Na 2 Si 3 O 7 -Na 2 (NaAl) 3 O 7 join has been examined to 1200 °C at ambient pressure with 29 Si MAS NMR and Raman spectroscopy. The distribution of Al 3+ among coexisting Q 4 , Q 3 , and Q 2 structural units in the glasses and melts was dete…
The silkworm Bombyx mori is one of the most well-studied insects in terms of both genetics and physiology and is recognized as the model lepidopteran insect. To develop an efficient system for analyzing gene function in the silkworm, we investigated the feasibility of using the GAL4/UAS system in conjunction with pigg…
Ni$_3$Al and Ni$_3$Ga are closely related materials on opposite sides of a ferromagnetic quantum critical point. The Stoner factor of Ni is virtually the same in both compounds and the density of states is larger in Ni$_3$Ga. So, according to the Stoner theory, it should be more magnetic, and, in LDA calculations, it…
ABSTRACT The inhibitory activity of chitosan‐based edible coatings was assessed against 2 food pathogens ( Staphylococcus aureus and Listeria monocytogenes ) and 1 strain involved in food alteration ( Pseudomonas aeruginosa ) on model agar medium and on a real cheese food product. Colony counting and epifluorescence m…