Villous papilloma of the rectum presenting as infective gastro-enteritis

Three elderly patients have recently been admitted as emergencies to the Infection Unit of the Aberdeen Hospitals as presumed cases of infective gastro-enteritis. Investigation revealed the presence of a villous papilloma of the rectum in each case.     

Determination of polymer crystallinity from proton solid-echo NMR measurements

Summary The decomposition of the solid-echo curves of crystalline polymers into the crystalline and the amorphous component is discussed. The crystalline component is experimentally determined by using a special method of measurement. The amorphous component is assumed to correspond to a distribution of correlation times.Presented at the 22nd Microsymposium Characterization of Structure and Dynamics of Macromolecular Systems by NMR Methods, Prague, CSSR, July 20–23, 1981The author thanks Dr. H. Haberkorn for the determination of the x-ray crystallinities.     

Eimeria maxima: a comparison of two laboratory strains with a fresh isolate

Oocysts of the Weybridge and Houghton strains of Eimeria maxima and a fresh field isolate were similar and measured on average 30-9 X 22-4 mum. The Weybridge strain and the field isolate produced similar pathogenic effects in 6-week-old chickens, high doses causing 50-80% mortality and severe weight loss. The Houghton strain was slightly less pathogenic and few birds died but more oocysts were produced. With each strain, a single dose gave complete immunity to a light challenge with the homologous strain. Two or 3 immunizing doses gave complete immunity to a heavy homologous challenge but were not sufficient to protect against heterologous challenge.     

Ein neuer Weg zur quantitativen Erfassung der Vorgänge beim kontrollierten Walzen

Qualitative Ableitung der Größe ?addierte Endverformung“ und ihre quantitative Beschreibung über temperaturabhängige Additionskoeffizienten. Vorausberechnung von Streckgrenze und Festigkeit aus dem Stichplan. Berechnung eines Übergangspunktes der Kristallinität und hieraus Konstruktion der Kerbschlagzähigkeitskurve.     

Preparation and Nucleophilic Reactions of β-Fluoro-γ-Alkyl Halides

Problems related to the preparation of β-fluoro-γ-alkyl halides and the nucleophilic reactions of these compounds are described. These compounds are found to be less reactive than the corresponding halides without the fluorine atom. Nucleophilic reactions of these halides are S_N2 reactions, and no allylic rearrangements are observed in any case.     

The Synthesis of 22-Trans-Cholesta-5, 22, 25-Trien-3β OL

22-Trans -cholesta-5,22,25-trien-3β-ol has been synthesized from triphenylphosphine-2-methyl-but-l-en-4-ylidene and 3-oxo-Δ⁴-bisnor-cholenal.