Die Brutv?del Siziliens

Ohne Zusammenfassung     

Gli organizzatori del fellogeno e del sughero in giovani rami di “Pinus Pinea„

Abstract

In Pinns Pinca L. la furniazione del sughero dipende da due organizzatori diversi che presiedono rispettivamente al processo di moltiplicazione e a quello di differenziazione : i fasci resinogeni sottoepidermici rappresentano l'organizzatore del fellogeno, l'epidermide rappresenta l'organizzatore del sughero.     

Sulla validità del genere Torulaspora

Zusammenfassung An 20 Stämmen von Torulaspora Rosei und 1 Stamm von Zygosaccharomyces globiformis forma typica wurde insbesondere die Sporenbildung untersucht. Da diese bei jenen immer parthenogenetisch erfolgt, muß die Gattung Torulaspora aufrecht erhalten werden.     

Basi ultrastrutturali della contrazione miocardica: la distensibilitá passiva del sarcomero quäle espressione della funzione ventricolare

Riassunto Dopo la discussione del metodo per la fissazione in toto del ventricolo sinistro a differenti pressioni passive di riempimento vengono riportati i dati biometrici ultrastrutturali della componente contrattile, dei mitocondri e del sistema trasversale del reticolo delle cellule miocardiche.L'aumento della pressione intraventricolare determina un rapido allungamento del sarcomero che raggiunge il valore di 2,2 a 10 mm Hg mentre il suo incremento è proporzionalmente minore ad elevate pressioni passive.Le miocellule degli strati sottoendocardici allo stesso livello pressorio sono inoltre maggiormente distese rispetto a quelle degli altri strati. Dall'analisi dei grafici relativi alle curve tensione/lunghezza e tensione/volume, risulta, inoltre, che l'allungamento dei sarcomeri è solo parzialmente responsabile dell'aumento della capacità ventricolare, per cui si può supporre che avvenga un nuovo ordinamento spaziale dei vari fasci nel contesto della parete.La distensibilitá passiva del sarcomero, qualora sia rapportata a precisi dati anatomo funzionali della cavità ventricolare, può essere ritenuta un valido modello per lo studio della contrattilità miocardica in condizioni normali e patologiche.

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Ultrastructural bases of myocardial contractility: the passive distensibility of the sarcomere, as an index of ventricular function

Summary Having described a method of total fixation of the left ventricle at different levels of passive pressure, the Authors refer about biometrical and ultrastructural data of the contractile component, the mitochondria and the transversal reticular system of the heart muscle cells.The raise of pressure in the ventricle determines a rapid increase of the sarcomere length, which can reach the value of 2,2 at a pressure of 10 mmHg. However, with higher passive pressures, a proportional minor increase of the sarcomere is found.With the same pressure, the myocells situated directly under the endocardium, became more distended than the myocells situated further in the myocard.From the analysis of the diagrams tension/length and tension/volume follows that the increase of the sarcomere is only partially responsible for the augmentation of the ventricular capacity. It is therefore possible that at the same time a new spatial arrangement of the fibres occurs.The passive distensibility, studied under any functional and anatomical condition of the ventricle, may be considered a valuable in vitro model for the study of the myocardial contractility under physiological as well as pathological conditions.

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La ricerca è stata eseguita con i fondi del C.N. R.     

Zur entwicklungsgeschichte der knochen im schädel des huhnes bis zum zeitpunkt des ausschlüpfens aus dem ei

Ohne Zusammenfassung     

Frecuencia de dermatofitos en una muestra de felinos del área urbana del Gran Mendoza,Argentina

BackgroundThe cat, considered the main reservoir of Microsporum canis, lives in urban areas, and also plays an important role in the emergence of dermatomycoses.AimsTo determine and analyse the frequency of zoonotic dermatophytes in a sample of cats in an urban area of the Gran Mendoza region.MethodsThe animals selected were household cats and cats less than one year old that came from shelters and kennels from urban areas in the Gran Mendoza region. A total of 45 samples from cats with and without dermatological lesions were analysed. These samples were collected through skin scraping, hair removal and Mackenzie brush, respectively. Direct observation was made with KOH and glycerol after heat exposure. Samples were cultured on Sabouraud and Lactrimel agar slants with chloramphenicol and cycloheximide for 30 days.ResultsThe frequency of dermatophytes isolated in this preliminary study was 13.3%. There were not statistically significant differences by source, age, sex, race or dermatological condition. Zoonotic dermatophytes were found in 2 household cats out of the 21 that had direct contact with children or the elderly. M. canis was isolated in 83.3% cases.ConclusionsThe frequency of isolation of zoonotic dermatophytes in the sample of cats in an urban area of the Gran Mendoza region was 13.3%, a value higher than expected. M. canis was the most isolated species.     

Consideraciones quirúrgicas del bocio amiloide

Amyloidosis is an uncommon syndrome consisting of a number of disorders having in common an extracellular deposit of fibrillary proteins. This results in functional and structural changes in the affected organs, depending on deposit location and severity.Amyloid infiltration of the thyroid gland may occur in 50% and up to 80% of patients with primary and secondary amyloidosis respectively. Amyloid goiter (AG) is a true rarity, usually found associated to secondary amyloidosis. AG may require surgical excision, usually because of compressive symptoms.We report the case of a patient with a big AG occurring in the course of a secondary amyloidosis associated to polyarticular onset juvenile idiopathic arthritis who underwent total thyroidectomy. Current literature is reviewed, an attempt is made to provide action guidelines, and some surgical considerations on this rare condition are given.     

Zitronensäuregärung Auf Stärkehydrolysaten

Summary It was the aim of the authors to examine the purification methods of the starch hydrolizate using the following adsorbents: Fuller's Earth, CaSO₄- dead burnt, activated coal, Amberlit IRA-410, Duolit C-20, Kaolin S, Kaolin NS and Al₂O₃ for Chromatography. Fermentation of the purified starch hydrolizate carried out withAspergillus niger C₂, showed that it could be used as a substrate for the citric acid fermentation. We obtained the best results using starch hydrolizates with a concentration of 10,24% of sugars purified with Amberlit IRA-410, 0,1–0,25% activated coal, Fuller's Earth and CaSO₄.     

Especie nueva del género Megastigma (Rutaceae), del estado de Guerrero,México

Megastigma balsense, from the Río Balsas basin, in Guerrero, Mexico, is described as new and illustrated. It is related to M. galeottii.