Malaprade’ introduced periodic acid for the purpose of dissociating the carbon chain of polyhydric glycols. Criegee,2 a few years later, introduced lead tetraacetate-which generally acts similarly to periodic acid-as an oxidant, particularly for the purpose of recognizing the presence of two adjacent terminal hydroxyl groups in glycosides. Fleury and Lange,” at the same time, recognized that pe...

In the present study, the lenses and ciliary bodies of 20 ostrich eyes were studied macroscopically and microscopically. The histological slides were studied after staining by hematoxylin and eosin, Verhoeff, Van Gieson, and periodic acid-Schiff (PAS). Posterior surface of lens was more convex than its anterior surface. The average lens diameter and thickness were respectively measured as 1.43 ...

Ergodic Optimization is the process of finding invariant probability measures that maximize the integral of a given function. It has been conjectured that “most” functions are optimized by measures supported on a periodic orbit, and it has been proved in several separable spaces that an open and dense subset of functions is optimized by measures supported on a periodic orbit. All known positive...

Para-Aminobenzoic acid is supported on silica gel via reaction of activated silica gel and p-aminobenzoic acid which is then converted to its manganese and cobalt salts. A mixture of the manganese and cobalt salts of the acid is used to catalyze allylic and benzylic alcohols to their corresponding carbonyl compounds in reasonable yields using oxygen or air. Reactions are clean and the catal...

We consider the 1D Schrödinger operator Hy = −y′′ + (p+ q)y with a periodic potential p plus compactly supported potential q on the real line. The spectrum of H consists of an absolutely continuous part plus a finite number of simple eigenvalues in each spectral gap γn 6= ∅, n > 0, where γ0 is unbounded gap. We prove the following results: 1) we determine the distribution of resonances in the d...

A sensitive and specific assay for hyaluronate was devised. Hyaluronate contained in biological mixtures was digested with a commercially available microbial hyaluronate lyase. The P-A4,5-eneglucopyranuronic acid residues contained at the nonreducing termini of the resulting oligosaccharides were oxidized with periodic acid to yield, among other products, formyl pyruvic acid. The latter compoun...

When a tensile strain is applied to a film supported on a compliant substrate, a pattern of parallel cracks can channel through both the film and substrate. A linear-elastic fracture-mechanics model for the phenomenon is presented to extend earlier analyses in which cracking was limited to the film. It is shown how failure of the substrate reduces the critical strain required to initiate fractu...