Bipartição escrotal associada à má formação prepucial em ovino Morada Nova: relato de caso / Scrotal bipartition associated with preputial malformation in sheep Morada Nova: case report

As alterações anatômicas do aparelho reprodutor masculino de ovinos são pouco relatadas, especialmente a condição de bipartição escrotal. Devido à importância do esclarecimento sobre esta alteração anatômica, objetivou-se relatar o caso de um ovino da raça Morada Nova que apresentava bipartição escrotal associada à má formação prepucial. Observou-se que essa alteração pode ocorrer como condição de adaptabilidade a climas tropicais.

The anatomical changes in the male reproductive system of sheep are rarely described, especially the scrotal bipartition condition. Due to the importance of clarification of this anatomical change, we aimed to describe a case of a Morada Nova sheep that had scrotal bipartition associated with preputial malformation. It was observed that this change may occur as a adaptability condition to tropical climates.

Conformational behavior of dimethyl 5-methyl-1H,3H-pyrrolo[1,2-c][1,3]thiazole-6,7-dicarboxylate 2,2-dioxide isolated in low-temperature matrixes.

The structure of dimethyl 5-methyl-1H,3H-pyrrolo[1,2-c][1,3]thiazole-6,7-dicarboxylate 2,2-dioxide (PTD) was investigated in low-temperature noble gas matrixes (Ar, Kr, Xe), amorphous solid, and the crystalline state by infrared spectroscopy and computational methods. The geometry of PTD conformers is defined by the orientation of two methyl ester groups, which may adopt pseudo-trans or pseudo-cis positions in relation to the pyrrolo-thiazole system. For both methyl ester groups, the latter arrangement was predicted by the calculations to be energetically the most favorable in the isolated molecule. The envelope form of the thiazolidine ring is present in all conformers, with the sulfur atom placed in the apex position, while the pyrrole ring is almost planar. Three types of conformers differing in the orientation of the methyl ester groups relative to the pyrrolo-thiazole system (cis/cis, trans/cis, cis/trans) were identified in the matrixes. The cis/cis forms were found to be the most stable ones in both gaseous state and argon matrixes. On the other hand, the more polar trans/cis forms were found to be stabilized in the more polarizable krypton and xenon matrixes as well as in the neat amorphous and crystalline phases. On the basis of annealing experiments, performed in argon and xenon matrixes up to 35 and 68 K, respectively, conformational changes preceding the aggregation of the compound are suggested.