Breakthroughs in vitrification protocols and the results obtained after frozen embryo transfer have resulted in a different version of the assisted reproduction standard cycles: the “freeze-all” cycles. Regardless of their use beyond the usual indications (elevated progesterone, risk of hyperstimulation, among others), this new concept currently represents a common practice in many institutions and is applied to all patients. In this article, we will discuss the various factors that may have contributed to this change in policy and the scientific evidence for this topic. Based on this evidence, we will conclude if clinics should change their way of working from fresh embryo transfers to only transfer frozen embryos, or if we should maintain the standard protocol.

Puya trianae is characterized for developing a colorful inflorescence, which turned it into an ornamental plant. Is not currently considered threatened, due to the fast habitat deterioration, populations survival is threatened; due to the last, we developed a micropropagation protocol, focused on its conservation and mass production for ornamental purpose, as well as the chromosome counting. For multiplication, seedlings from germinated seeds were used in vitro and we made four tests to determine the type, concentration and time of exposure of some regulators, as well as the partial or total explants excised. Throughout the rooting phase, shoots were grown in MS/2 alone and/or supplemented with IBA and NAA; the acclimatization of the obtained seedlings was carried out in different mixtures land:peat:capote, in a growth room and a greenhouse. Buds and shoots that finished their develop...

Puya trianae se caracteriza por desarrollar una vistosa inflorescencia que la caracteriza como planta de uso ornamental. Aunque actualmente no se considera amenazada, debido al rápido deterioro de los ecosistemas donde habita, la supervivencia de sus poblaciones sí está amenazada; por dichas razones se desarrolló un protocolo de micropropagación, aplicable para su conservación y para producción masiva de plántulas con fines ornamentales, así como a la determinación de su número cromosómico. Para la multiplicación se utilizaron plántulas provenientes de semillas germinadas in vitro realizando cuatro ensayos para determinar tipo, concentración y tiempo de exposición de algunos reguladores, además de la escisión parcial o total de explantes. Durante la fase de enraizamiento se cultivaron brotes en MS/2 solo y/o suplementado con AIB y ANA; la aclimatización de las plántul...

El traslado intrahospitalario del paciente crítico, es un procedimiento que conlleva muchos riesgos latentes para el paciente, por lo que conocer los riesgos a los que se enfrenta es fundamental para mejorar la seguridad. Objetivo: analizar las características del traslado seguro del paciente crítico dentro de la institución de salud. Metodología: se realizó una revisión bibliográfica en las bases de datos de: Scielo, Pubmed, Lilacs, La Referencia; y en la revista de científica Elsevier. Resultados: se seleccionaron 20 artículos científicos, comprendidos entre el año 2014 -2021,se encontró que los eventos adversos más comunes están relacionas con la alteración hemodinámica, respiratoria y neurológica del paciente; las instituciones no cuentan con protocolos específicos para el traslado intrahospitalario y los cuidados para un traslado seguro son aquellos concernientes ...

Las bandas transportadoras son indispensables en la minería, permitiendo el traslado eficiente de materiales pesados y contribuyendo a una producción fluida. Esta investigación se enfoca en mejorar la evaluación del empalme vulcanizado en caliente de estas bandas en una empresa minera, buscando reducir riesgos de fallas continuas en operación. El propósito del estudio es diseñar un protocolo específico para el empalme vulcanizado en caliente, con el fin de minimizar los riesgos de fallo continuo en una empresa minera en Ancash. A través de una metodología aplicada, se desarrolla un proceso que incluye la definición de materiales, análisis de fichas técnicas, normativas, manuales y el desarrollo del ensayo de tracción según la norma ISO 283. Como resultado, se diseñó un procedimiento de empalme vulcanizado en caliente de fajas transportadoras de minerales con núcleo text...

Drying is a method to preserve fruits, vegetables and fish by reducing their volume, their weight. Drying involves the application of energy to vaporize and mobilize the moisture content within porous products. During this process, heat and mass transfer occur simultaneously. The quality of dehydrated fruits, vegetables, and aromatic herbs is a problem closely related to the development and optimization of new drying techniques. This research work addresses the common drying methods applied to fruits, grains, fish and nutrients in relation to possible options to improve the quality of dried products using different drying techniques or their combination. In general, the drying technique is different for each of the materials studied and specific conditions should be recommended after a proper evaluation of the drying protocols. However, a novel or combined technique must ensure a high qu...

OBJECTIVES: To determine the maternal characteristics with statistical probabilities of association with neo natal infection in patients rum premature rupture of membranes (PROM), both at term, as premature. Evaluate the perinatal morbidity and mortality MATERIAL AND METHODS: Retrospective observational study, case-control (infected-no newborn infected) between April 1998 and March 1999, according to protocol established in the Department of Obstetrics Loayza Hospital, entering pregnant with a single fetus, active, without fever and diagnosed with RPM. RESULTS: Of 3985 deliveries, 284 had RPM: 263 were to term and 21 preterm; 8 infants were not assessed (transferred by malformations, four mature, four premature). 259 pregnancies to term 42 infants were infected (16.2%) and 17 premature 11 were infected (64.7%). In term pregnancies, unmarried marital status was statistically significant i...

OBJECTIVES: To determine the maternal characteristics with statistical probabilities of association with neo natal infection in patients rum premature rupture of membranes (PROM), both at term, as premature. Evaluate the perinatal morbidity and mortality MATERIAL AND METHODS: Retrospective observational study, case-control (infected-no newborn infected) between April 1998 and March 1999, according to protocol established in the Department of Obstetrics Loayza Hospital, entering pregnant with a single fetus, active, without fever and diagnosed with RPM. RESULTS: Of 3985 deliveries, 284 had RPM: 263 were to term and 21 preterm; 8 infants were not assessed (transferred by malformations, four mature, four premature). 259 pregnancies to term 42 infants were infected (16.2%) and 17 premature 11 were infected (64.7%). In term pregnancies, unmarried marital status was statistically significant i...