1. The pneumococcal type IX polysaccharide (polysaccharide S IX) has been oxidized by sodium metaperiodate and reduced by sodium borohydride. Of the constituent monosaccharides, N-acetylglucosamine and N-acetylmannosamine remain unaltered, whereas 40% of the glucose and 90% of the glucuronic acid are oxidized. 2. The effect of oxidation and subsequent reduction on the precipitation of polysacch...

We consider the dynamics towards the initial singularity of Bianchi type IX vacuum and orthogonal perfect fluid models with a linear equation of state. The ‘Bianchi type IX attractor theorem’ states that the past asymptotic behavior of generic type IX solutions is governed by Bianchi type I and II vacuum states (Mixmaster attractor). We give a comparatively short and self-contained new proof of...

introduction when a liquid is irradiated with high-intensity and low-frequency ultrasound, acoustic cavitation occurs and there are some methods to determine and quantify this phenomenon. the existing methods for performing these experiments include sonochemiluminescence (scl) and chemical dosimetric methods. the particles in a liquid decrease the ultrasonic intensity threshold needed for cavit...

An h.p.l.c. method was developed for the assay of coproporphyrinogen oxidase activity in rat liver. The protoporphyrinogen IX formed is completely oxidized to protoporphyrin IX for separation and quantification by reversed-phase chromatography with mesoporphyrin as the internal standard. The Km of coproporphrinogen oxidase is 1.01 +/- 0.23 microM. The activities are 4.07 +/- 0.40 nmol of protop...

We introduce two generalisations of the full symmetric inverse semigroup IX and its dual semigroup I ∗ X – inverse semigroups PI ∗ X and PI ∗ X . Both of them have the same carrier and contain IX . Binary operations on PI∗X and PI ∗ X are reminiscent of the multiplication in IX . We use a convenient geometric way to realise elements from these two semigroups. This enables us to study efficientl...

Title IX has undoubtedly increased athletic opportunities for young high school and college women. What is less well understood is whether Title IX has had the unintended consequence of decreasing educational opportunities for young women relative to men. This paper examines the relationship between a university's compliance with Title IX via the proportionality standard and the subsequent admi...

We report the effects of zinc metal substitution on the molecular dynamics of protoporphyrin-IX in dichloromethane solvent by spectrally resolving the femtosecond photon echo spectrum. We have found that the coherence and population dynamics change due to the presence of Zn metal in the protoporphyrin-IX system. Zinc metal reduces the conformational disorder in the molecular structure of protop...

In demyelinating diseases such as multiple sclerosis, a critical problem is failure of remyelination, which is important for protecting axons against degeneration and restoring conduction deficits. However, the underlying mechanism of demyelination/remyelination remains unclear. N-acetylglucosaminyltransferase-IX (GnT-IX; also known as GnT-Vb) is a brain-specific glycosyltransferase that cataly...

Bovine skin fibroblasts accumulated protoporphyrin IX when incubated in culture with the porphyrin-heme precursor, delta-aminolevulinic acid (ALA). Fibroblasts from cattle homozygous for erythropoietic protoporphyria (EPP) and with the clinical symptoms of the disease accumulated approximately sixfold greater amounts of protoporphyrin IX than cells from normal control animals. Cells from obliga...