1,721,052 research outputs found
Post weaning plasma progesterone, prolactin and environmental influence in the resumption of ovarian activity in sows
No full textPlasma progesterone levels were determined three days after weaning in 151 sows Landrace x Large White. Furthermore, the influence of bromocriptine (Parlodel®, Sandoz) was studied on the resumption of ovarian activity in 19 sows during the hot season. An increased progesterone base-line level was shown during the June-July-August period as compared with May and September-October. No correlation was found between progesterone levels and the percentage of sows which returned to estrus 10 days after weaning except when progesterone levels reached and exceeded 0.9 ng/ml; in this case, no sow resumed ovarian activity in normal time. Bromocriptine treatment had no influence on the resumption of ovarian activity, suggesting that prolactin is not involved in the lack of estrus after weaning. An influence of environmental factors is also suggested
Caratterizzazione del miotomo in Teleostei. Studio su Salmo trutta trutta e Oncorhynchus mykiss
No full textL’obiettivo di tale lavoro è di valutare le differenze istochimiche delle fibre muscolari elemento fondamentale dell’attività motrice del muscolo e di evidenziare la la presenza di mucopolisaccaridi nell’apparato digerente in modo da definirne il ruolo di difesa delle mucose gastrointestinali da agenti chimici e patogeni in due condizioni sperimentali differenti: alimentazione tradizionale; alimentazione tradizionale con l’aggiunta di sostanze biologiche. La sperimentazione è stata condotta sulle due specie di Teleostei maggiormente allevate in Italia: Oncorhynchus mykiss (Trota Iridea) e Salmo (trutta) trutta (Trota Fario). Il fine ultimo della ricerca è stato quello di identificare la specie che meglio si adatta all’ambiente artificiale quale quello dell’acquacoltura
Histochemical and Morphometrical Characterization and Distribution of Fiber Types in four muscles of Ostrich (Struthio camelus).
No full textA staining procedure used for simultaneously determining
three different fibre types in single sections bovine, porcine or
ovine skeletal muscle was modified for use with Ostrich
skeletal muscle. The muscle fibres of Gastrocnemius pars
externa, Tibialis cranialis caput tibiale, Tibialis cranialis
caput femorale and Fibularis longus tendo caudalis were
studied. The histochemical results revealed the presence of
three types of fibre only in the Gastrocnemius pars externa
muscle: fast-twitch glycolytic fibres (FG), fast-twitch oxidative
glycolytic fibres (FOG) and slow-twitch oxidative fibres
(SO), while in the other muscles the FG fibres were absent.
The percentage distribution of fibres types showed a higher
incidence of SO fibres compared to FOG fibres in Tibialis
cranialis caput femorale and Tibialis cranialis caput tibiale
muscles, while it was opposite in the case of the Fibularis
longus tendo caudalis muscle. In the Gastrocnemius pars
externa muscle the FG fibres outnumber the other fibres,
followed by the SO and FOG fibres. The results of the
analysis of variance show significant interaction between
muscle · fibre type for every morphometric parameter evaluated.
Differences about value of fibres area exists between
Tibialis cranialis caput femorale and Fibularis longus tendo
caudalis muscles. Both fibre types in Tibialis cranialis caput
tibiale muscle have mean values of transversal section area
smaller than Tibialis cranialis caput femorale. The other
morphometric parameters show a similar trend. The Gastrocnemius
pars externa muscle presents similar dimensions
of muscle fibres for the FG and FOG types, and significantly
smaller for the SO type
Valutazione dell’effetto del Sistema Calpaina/Calpastatina sull’intenerimento della carne di Bovino Podolico durante la fase di frollatura.
No full textObiettivo dello studio è stato valutare l’attività di tale sistema enzimatico attraverso analisi biochimiche (espressione e attività della μ-calpaina, della p-94, della calpastatina e della -actina) immediatamente dopo il sacrificio degli animali e la variazione del sistema nel corso della frollatura di su diversi muscoli di Bovino Podolico: 1. testa (masseter) 2. collo (brachiocaephalicus) 3. cintura e dell’arto toracici (supraspinatus) 4. torace (diaphragma) 5. addome (rectus abdominis) (psoas minor) (psoas major) al fine di identificare a quali tempi di frollatura si verificano cambi significativi a livello strutturale dovuti ai processi di proteolisi intervenuti sui tagli scelti
Sex hormone levels in the Buffalo epididymis, (Bubalus buffalus)
No full textAndrogen and estradiol titres were obtained from studies on the plasma, testis and epididymis of Bubalus buffalus, using a RIA method. Animals were sacrificed in late summer or autumn.
In plasma the androgen titres increased in the November specimens and estradiol was demonstrable only then. Androgens in epididymis were detected at a higher concentration in all zones in the autumn. Estradiol in September speciment was present only in the caput and cauda, while in November it was found in all zones
Il sistema calpaina/calpastatina in 3 muscoli dell’arto pelvico di struzzo African Black. Studio istochimico, immunoistochimico e morfometrico.
No full textScopo di questo lavoro è stato fornire una descrizione dettagliata di tre muscoli dell’arto pelvico di struzzo African Black, analizzare le loro caratteristiche istochimiche e morfometriche, e esaminare l’attività del sistema calpaina/calpastatina attraverso l’utilizzo di metodiche immunoistochimiche
Muscle fibre types, fat deposition and fatty acid profile of Casertana versus Large White pig
No full textUsed were 8 castrated males and 8 entire females of indigenous Casertana and Large White pigs, 4 animals of each breed. In Longissimus dorsi (LD) and Psoas major (PM) muscles the morphometric characteristics of FG (fast glyeolytie), FOG (fast oxidative glyeolytie) and SO (slow oxidative) fibre types was performed and their percentage determined. Determined was also the area of adipocytes from internal and external layer of adipose tissue from backfat, shoulder, dorsal and loin regions. The SO were larger than FG and FOG fibres (P<0.05-0.001) and the size of FG fibres was significantly different among the two breeds considered, higher in Large White pigs and lower in Casertana. LD muscle was characterized by FG and SO fibres larger than PM (P<0.001). Males had fibres larger than females in both muscles and breeds. The dorsal region had bigger adipocytes in both the pig breeds (P<0.05-0.01). In comparison with the outer fat layer, the inner and middle layers showed more developed adipocytes. Differences in fatty acid composition were observed between breeds. Particularly, Casertana pigs showed higher level of essential fatty acids than did Large White. The results showed the particular characteristics of the Casertana breed as compared to pig lines intensively selected for growth efficiency
la notte dei musei "luci nella notte" musei in movimento
No full textIl DVD contiene il filmato e le fotografie dell'intera manifestazione, nonché la raccolta delle presentazioni ppt dei relatori italiani e starnieri intervenuti alla manifestazione "la notte dei musei" dell'anno 2005. Il CD, dal titolo "il cavallo di Gioacchino Murat" inciso in Germania, contiene i brani eseguiti dal gruppo Jazz "D'Errico quartet", nella notte dei musei
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