1,721,071 research outputs found
Primi rilievi morfometrici del rene di colombo (Columba Livia).
No full textIl nefrone negli Uccelli si presenta eterogeneo sia nella grandezza che nella struttura. Fondamentalmente abbiamo due differenti tipi di nefroni, con e senza ansa di Henle; i primi sono del tipo dei mammiferi (M) e danno un'urina più concentrata, i secondi sono di tipo rettiliano (R) e danno un "urina meno concentrata (Dantzler e Braun, 1980). Anche nel nefrone degli Uccelli è presente l'apparato iuxtaglornerulare che si associa alle cellule del mesangio. Comunque nessun altro gruppo di vertCbrati mostra un cosi semplice disegno di ansa capillare (Dantzler; 1985) in contrasto con i capillari che noi troviamo anastomizzati nei Mammiferi (Braun, 1982). I reni sono organi simmetrici, destro (dx) e sinistro (sn), suddivisi in tre lobi, pressocchè uguali, per mezzo di scissure trasversali di varia profondità: craniale, medio e caudale. Il parenchirna è formato da lobuli piriformi, con una parte più ampia apicale detta corticale e una più piccola detta midollare. I nefroni M sono meno numerosi e situati in prossimità midollare, quelli R sono in periferia. Nel presente lavoro sono stati comparati il numero e la grandezza dci glomeruli renali di colombi a diverse età e sono stati sottoposti ad analisi statistiche
Electrophoretical patterns of hemoglobins and hemoglobin concentrations in the adults trouts Salmo balcanicus, Salmo aphelius and Salmo letnica of Ohrid Lake
No full textHemoglobins of Ohrid Lake trouts Salmo aphelius Kottelat 1997, Salmo balcanicus and Salmo letnica have been analyzed in agarose gel electrophoresis. Electrophoretical patterns of these three species revealed the presence of multiple hemoglobins: three anodic fractions and two cathodic fractions. This study provides information on hemoglobin electrophoretical patterns of fish individuals of the length 24-51 cm and weight from 150-1150 g. The electrophoretic fractions migrated closely together with a relative mobility of anodic bands (fractions) varying between 0.324 and 0.418 and of cathodic bands varying between 0.479 and 0.691. No difference has been detected for hemoglobin components on agarose gel electrophoresis and adult individuals between these three examined groups of Ohrid Lake trouts. Hemoglobin concentrations in the adults of Salmo balcanicus, Salmo aphelius and Salmo letnica were in the same levels with some other salmonids. © Medwell Journals, 2013
Spontaneous skin canine tumors: toluidine blue stain detection of mast cells in tissue section.
Full text linkDog mast cell tumor (MCT) is common in dog. The etiology of canine MCTs is unknown, but it is probably multi-factorial. Its incidence is higher than it has found in human. There are demonstrated several common biological and clinical characteristics in both species. Cutaneous mast cells are located in the dermis and hypodermis. The objective of this study is to detect of MC on Toluidine Blue stained slides. There were examined 74 dogs of difference breeds and aged, from Tirana city. Six of them demonstrated the skin canine tumors. Skin samples were obtained from these animals. Macroscopic examination of the tumor revealed nodular ulcerated lesion with areas of necrosis and hemorrhage, accompanied with normal superjacent epidermis and annexes. Serial sections obtained from biopsy specimens were processed with toluidine blue staining pH 4.5, specific for MC identification. This study suggests that Toluidine blue, pH 4.5 stain may give a good information about skin tumors in dog, histologically with benign behavior
Livelli plasmatici di catecolamine nel pulcino dopo trattamento con Monensin mediante mangime.
No full textModificazioni ultrastrutturali delle aree lattifere e dell’adenoipofisi dopo somministrazione di ivermectina in colombi fisiologicamente stimolati.
No full textIvermectin residues in milk of lactating donkey (Equus asinus): current regulation and challenges for the future
No full textIvermectin (IVM) is a macrocyclic disaccharide anthelmintic agent with broad-spectrum antiparasitic action.
It is used for controlling internal and external parasites in food-producing animals (bovine, swine and equine
species), including donkey. This drug is included in Council Regulation (EEC) 2377/9, annex I, with
Maximum Residue Limit (MRL) ranging from 15 to 100 μg kg−1 depending on the species. The
pharmacokinetic characteristics of IVM mainly depend on the animal species, formulation and route of
administration. Due to its high lipophilicity it accumulates in milk of food producing animals. Detailed IVM
pharmacokinetic studies were carried out for horse, pig, cattle, sheep, and goat, but there is lack of information
for asinine species. Consequently, the absence of “label milk withdrawal time” and MRLs in donkey’s milk
indicates that IVM should not be used in lactating animals. On the contrary, information about IVM residues
in milk would be of paramount importance in view of the fact that donkey’s milk is a suggested substitute
for infants suffering from hypersensitivity to cow’s, sheep’s and goat’s milk protein or from multiple
hypersensitivity. European legislation does not explicitly state that an MRL should be determined for every
target species; however it’s interpretation led to MRLs being adopted for each species and each foodstuff.
Although IVM is approved for use in all lactating animal species the possibility of an illegal use should be
considered. In this paper, the problems arising from IVM administration in lactating donkey are analysed. A
particular attention is paid for the existing legislation and some proposals are suggested for regulatory
framework formulation
Role of macrophages in protection against pathogens in fish: some considerations on animal welfare
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