1,721,060 research outputs found
The mechanism of residual body disposal in the seminiferous epithelium of lizard (Podarcis sicula campestris De BETTA): A morphological, cytochemical and endocrinological study
No full textVariabilità glicoproteica nel testicolo di lucertola (Podarcis s1cula campestris) durante il suo ciclo annuale
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Effects of testosterone and oestradiol on lizard's (Podarcis s.c.) testes in sexual refractoriness
No full textDistribuzione dei siti lectino leganti nel dotto dell'epididimo di Podarcis s.c. (Reptilia, Lacertidae) in recrudescenza sessuale
No full textCaput epididymis of lizard (Podarcis s.c. ) as initial target of androgen fluctuations. Ultrastructural aspects.
No full textUltrastructural study of the epididymal ductuli efferentes epithelium in Podarcis s.c. (Reptilia, Lacertidae): comparison with birds and mammals ductuli efferentes
No full textHistochemical analysis of lizard testicular glycoconjugates during the annual spermatogenic cycle
No full textThe distribution of glycoconjugates in the testis of lizard Podarcis s. campestris De Betta was investigated by HRP-conjugated lectins during the annual spermatogenetic cycle. In addition, pretreatments of sections with neuraminidase and removal of alkali-labile O-linked sequences by beta-elimination allowed the structure of glycoconjugates to be further explored. Leydig cells displayed changes of lectin-binding sites during annual cycle, and during the abortive spermatogenesis period lacked N-linked sialylgalactosyl glycans. Sertoli cells stained by Con A, WGA, RCA120, BS I-B4, showed, except in July, O-linked sialylgalactosyl glycans. Spermatogonia bound Con A and WGA. Spermatocytes bound also BS I-B4, SBA, UEA I, and during spring spermatogenesis, revealed O-linked sialylgalactosyl glycans. The acrosomes of spermatids were also stained by RCA120 and PNA, whereas the heads of spermatozoa did not bind SBA and PNA. During the abortive spermatogenic period, the acrosomes showed O-linked sialylgalactosyl glycans and N-linked glycans terminating in beta-galactosyl residues. During the reproductive period, the acrosomes of spermatozoa expressed O- and N-linked sialylgalactosyl glycans and beta-galactosyl terminal residues on O- and N-linked glycans. This, in the testis of lizard, the two spermatogenesis periods show the emergence of different types of glycosylation
Spilamberto in età medievale
No full textIl saggio esamina l'evoluzione dell'insediamento medievale di Spilamberto individuando tre fasi salienti: una prima, più antica, che va dall'età longobarda, tra VII e VII secolo, sino al tardo secolo XII; una seconda, determinata dal controllo del territorio locale da parte del Comune di Modena; una terza, conseguente al radicamento sul luogo della signoria della famiglia Rangoni, appartenente all'aristocrazia cittadina modenese, che si afferma dal Trecento e si consolida grazie alle investiture a titolo feudale concesse dai marchesi Estensi
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