Crystalline nanoparticles or nanoprecipitates with a cubic structure often have near polyhedral shapes composed of low-index planes with {100}, {111} and {110}. To consider such near polyhedral shapes, algebraic formulas of extended superspheres that can express intermediate shapes between spheres and various polyhedra have been presented. Four extended superspheres, (i) {100} regular-hexahedra...

The reaction of the metal-organic precursor Fe[N(SiMe3)2]2 with H2 in the presence of a long-chain acid and a long-chain amine in various proportions produces monodisperse zerovalent iron nanoparticles. These Fe particles display magnetic properties that match those of bulk iron as evidenced by magnetic and Mössbauer measurements. The nanoparticles adopt a cubic shape with edges of 7 nanometers...

A protein combined with phytic acid has been extracted from the dried seeds of Phaseolus vulgaris, variety Great Northern, by the following method. &traction-l00 gm. of bean flour were stirred wit,h 100 ml. of N NaCl, followed by 800 ml. of water. The suspension was centrifuged and the sediment discarded. The pH of the turbid supernatant solution was lowered to 4.6 with about 7.0 ml. of N HCl, ...

SIRs,-In your April issue (Brit. J. Ophthal., 1965, 49, 205) you published my paper "Applanation Tonometry using One Drop of an Anaesthetic-Fluorescein Mixture". This paper recommended a mixture containing 0 3 per cent. Novesine and 0)125 per cent. fluorescein; one drop gave good corneal anaesthesia and a good fluorescent ring for Goldmann applanation tonometry. Of the eight anaesthetic solutio...

In the previous paper (1) a procedure was outlined for the isolation of a highly purified, apparently crystalline, blue-green colored copper protein from horse liver. The precipitate obtained in step 8 of the isolation procedure (1), contains a number of proteins of potential biochemical interest. Two of these proteins, in addition to the copper protein, have been separated by fractionation wit...

BACKGROUND Precipitous labor is defined as expulsion of the fetus within less than 3 hours of commencement of regular contractions. We retrospectively examined our cases of precipitous labor to identify the clinical significance and perinatal outcomes following precipitous labor in singleton vertex deliveries. METHODS A retrospective population-based study was conducted comparing women with s...

The majority of invertebrate skeletal tissues are composed of the most stable crystalline polymorphs of CaCO(3), calcite, and/or aragonite. Here we describe a composite skeletal tissue from an ascidian in which amorphous and crystalline calcium carbonate coexist in well-defined domains separated by an organic sheath. Each biogenic mineral phase has a characteristic Mg content (5.9 and 1.7 mol %...

Crystalline proteins, such as edestin or melon globulin, remove pepsin from solution. The pepsin protein is taken up as such and the quantity of protein taken up by the foreign protein is just equivalent to the peptic activity found in the complex. The formation of the complex depends on the pH and is at a maximum at pH 4.0. An insoluble complex is formed and precipitates when pepsin and edesti...

The vast majority of commercial polyolefins are semi-crystalline materials. Depending on the chemical composition and tacticity, their melting temperatures range from ambient to temperatures exceeding 160 C. Polyolefins form various crystalline structures that can be investigated with microscopic, spectroscopic and scattering techniques. When a semi-crystalline polyolefin is dissolved in a solv...

Glass-ceramics from the studied system are able to precipitate a crystalline phase with an anomalous and low coefficient of thermal expansion. Besides called LEAZit (Low Expansion Alkaline Earth Zinc Silicate), other phases appear within those glass-ceramics. In order understand expansion behavior whole material, content has be known as function composition chosen heat treatment. this paper, gl...