Encapsulation in sub-micron species: a short review and alternate strategy for dye encapsulation.

The encapsulation of molecular species has received considerable attention in recent years. Polymers, dendrimers and microemulsions along with other systems have been used as precursors for the synthesis of encapsulating agents. Especially important in this field is the core-shell architecture. This structure offers the encapsulated species an extra level of protection due to the presence of a shell, covering the interior of a capsule. Dyes, porphyrines, drugs, cells and other active agents have been successfully encapsulated, and the host-guest interaction has been studied by various experimental techniques. A review is new provided of the progress made in this field in the last several years is presented. Different classes of synthetic approaches are presented and resulting encapsulation studies are summarised. An approach to the encapsulation of dansyl chloride dye in core-shell nanoparticles is also presented.

[The prevalence of infertility and the importance of nursing work in this field]. / Prevalencia de la infertilidad e importancia de la labor de enfermería en este campo.

A survey in the health area of "Héroes del Moncada" Polyclinics in Plaza de la Revolución municipality from Havana City was carried out by means of a multistage sampling in which 352 women in reproductive age (15-49 years old) were randomly chosen. A questionnaire designed by the World Health Organization for this kind of investigation was applied and a work of information and orientation was carried out for the infertile women. Prevalence of infertility in this health area was moderate and was found in 9.1% of the total number of women studied (12.1% of married women). Primary infertility was found in 0.6% of the total number of the women studied (12.1% of married women) and secondary infertility was found in 8.5% (11.3% of married women). A 43.8% of infertile women wanted to be pregnant what inversely correlated with the age and the number of children. The efficacy of the educational work of nursing was evidenced because 85.7% of infertile women who wanted to be pregnant attended the specialized consultation after the interview by the nurse. It is recommended to increase the nursing activity in the field of human reproduction.

Estudio esteroideo urinario en hirsutas constitucionales y con poliquistosis ovarica. / Urinary steroid study in constitutional hirsute patients and with ovarian polycystosis

Se estudiaron 63 pacientes hirsutas ingresadas en la sala de endocrinologia clinica del IEEM, 36 con poliquistosis ovarica (PO) y 27 hirsutas constitucionales (HC).Las PO mostraron una menor inhibicion de los 17 OH, 17 Cs y Ptriol durante las pruebas de inhibicion adrenal con Dxm (p< 0,05). Las hirsutas con PO tenian una mayor excrecion de Ptriol en condiciones basales y durante la estimulacion ovarica con HCG (p < 0,05). La eliminacion de E y de las fracciones 11 ceto y A de los 17 Cs fue similar en ambos grupos. La excrecion de la fraccion DHA fue mayor en las HC en condiciones basales y durante la estimulacion adrenal con ACTH (p < 0,05).Se observo un incremento mayor de la fraccion Et durante la estimulacion ovarica con HCG en las pacientes con PO (p < ,05). A pesar de las diferencias encontradas en la eliminacion de compuestos esteroideco entre las pacientes con PO y las HC, consideradas como grupo, existio una gran variabilidad y solamiento en los resultados de las pruebas que hacen dificil precisar, en casos particulares, la existencia o no de poliquistosis ovarica por los resultados de estas pruebas