Giant unruptured aneurysm of the left sinus of Valsalva in the left ventricular outflow tract of a young dog

A young adult, 28 kg, intact female Siberian husky-mixed breed dog was presented to the Veterinary Medical Teaching Hospital (VMTH) Emergency Service for evaluation of a dysrhythmia and an abnormal cardiac structure. The dog had been adopted from an animal shelter approximately 3 months before presentation. The dog occasionally showed exercise intolerance, and the owners suspected that she had impaired vision. Initial clinical signs appeared 2 days before presentation during strenuous activity—the dog uncharacteristically stopped and lay down while tachypneic. The dog produced dark liquid feces and was lethargic and anorexic overnight.     

Luteoforol,a flavan 4-ol,is induced in pome fruits by prohexadione-calciumand shows phytoalexin-like properties against <Emphasis Type="Italic">Erwinia amylovora</Emphasis>and other plant pathogens

Treatments with prohexadione-calcium led to lowered incidence of fire blight, scab and other diseases in pome fruit trees and other crop plants. In addition to acting as a growth regulator, prohexadione-calcium interferes with flavonoid metabolism and induces the accumulation of the 3-deoxycatechin luteoliflavan in shoots of pome fruit trees. Luteoliflavan does not possess any remarkable antimicrobial activity. Therefore luteoforol, its unstable and highly reactive precursor, has been tested in vitro for its bactericidal and fungicidal activities. Luteoforol was found to be highly active against different strains of Erwinia amylovora, the causal agent of fire blight, and all other bacterial and fungal organisms tested. Phytotoxic effects were also observed in pear plantlets. The results obtained indicate that prohexadione-calcium induces luteoforol as an active principle with non-specific biocidal properties. It is proposed that luteoforol is released upon pathogen attack from its cellular compartment and inhibits further disease development by destroying pathogen cells as well as by inducing a hypersensitive-like reaction in the host plant tissue. This mechanism would be closely analogous to the one known for structurally related phytoalexins in sorghum.     

Bemerkungen zu einigen kultiviertenSorghum-Sippen auf der Grundlage ihrer Korrelationsstruktur

Zusammenfassung Die Korrelationsstruktur kultivierterSorghum-Sippen wurde mittels Berechnungen von Koeffizienten der Divergenz der Korrelationen (KDK) und Ähnlichkeitskoeffizienten (ÄK) untersucht. Dafür wurden22 Merkmale an 54 nach dem System vonJakusevkij (1969) 7 Kulturarten zugerechnetenSorghum-Sippen geprüft. Besonders wurden morphologische Merkmale der vegetativen Sphäre und ökologische Merkmale untersucht, die gewöhnlich für dieSorghum-Systematik, die sich auf Merkmale der Organe der generativen Sphäre gründet, keine große Rolle spielen.Nach den Ergebnissen von KDK und ÄK erweist sich der S.durra-Komplex, der deutlich viele Kulturpflanzenmerkmale zeigt, als besonders hoch entwickelt. Ihm sehr ähnlich ist derS. nervosum-Komplex. DerS. guineense-Komplex dagegen steht weit von diesen Artenkomplexen, die sich im Zentrum der Diagramme befinden (Abb. 3 und 4), entfernt. Seine Merkmale entsprechen im Durchschnitt auch mehr dem Wildtyp.Beim Studium der Korrelationsstruktur war es möglich, anhand der von uns gewählten Merkmale manche Artenkomplexe deutlich zu unterscheiden. Es wird festgestellt, daß einige der in neuerer Zeit zu einer Art zusammengefaßten kultiviertenSorghum- Sippen als eigenständige Arten aufgefaßt werden können.

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Remarks on some cultivatedSorghum races on the basis of their correlation structure

Summary The correlation structure of cultivatedSorghum races was studied by using the coefficient of divergence of correlations (KDK) and the coefficient of similiarity (ÄK). In 54Sorghum races (table 1), which were grouped into 7 species (table 2) according toJakuevskij (1969),22 characters (table 3) were studied. Above all morphological characters from vegetative organs and ecological characters were tested, which do not play an important role for the systematics ofSorghum, because this is founded on characters from generative organs mainly. The results from KDK (fig. 3) and ÄK (fig. 4) show that theS. durra — complex is highly developed and has many characters of cultivated plants. TheS. nervosum-complex is similar to it. Whereas theS. guineense — complex can be found at the periphery of the diagrams (fig. 3 and 4) far away from the already mentioned complexes, which are located in the centres of the diagrams. The characters of theS. guineense — complex are similar to the wildSorghums mainly.From the study of the correlation structure it was possible to separate some of the species — complexes very clearly by using the above mentioned characters. We can state that some of the cultivatedSorghums, which are now often united into one species, may be regarded as good species.

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Sorghum

0 ( ) (ÄK). 22 ( . 3) 54 (. 1) (1969) 7 (. 2). , , . , . ÄK , S. durra . S. nervosum. ,S. guineense (. 3 4) . . , . , .

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Die Arbeit entstand während eines längerfristigen Arbeitsaufenthaltes. Mein Dank gilt dem VIR für Arbeitsmöglichkeiten und Material.     

Wirkung von antibiotikumhaltigen Kulturfiltraten von Angehörigen derStreptomyces-albus-Gruppe auf den Apfelmehltau und Spinnmilben in vivo

Zusammenfassung Im Rahmen von Untersuchungen zur Bekämpfung des Apfelmehltaues mit antibiotikumhaltigen Kulturfiltraten von Angehörigen derStreptomyces-albus-Gruppe konnte festgestellt werden, daß die Kulturfiltrate bestimmterStreptomyces-Stämme neben einer guten Wirkung gegen Apfelmehltau auch eine beachtliche acaricide Wirkung besitzen. Dies wird an Hand von Freiland- und Laborversuchen dargestellt.