<p>Este documento expone la metodología y los resultados obtenidos en el desarrollo de una investigación sistemática, que trata sobre a la implementación de misiones de cohetería experimental. En este proceso se obtuvieron, datos y resultados que permitieron corroborar de forma experimental, conceptos de propulsión, aerodinámica y balística propios de una aeronave tipo cohete sin elementos de control activo a bordo. Para el estudio e implementación de esta misión, se generó un método dividido en etapas por las cuales se guió el desarrollo del proyecto; primero se realizó la etapa de validación y el<br />diseño preliminar en forma teórica, se continuó con la etapa de simulación, utilizando un software especializado y culminó con la etapa del proceso constructivo y el procedimiento de disparo. La puesta en marcha de esta misión de cohetería experimental permitió alcanzar, propulsado por un combustible tipo “candy” compuesto por nitrato de potasio y sorbitol, un apogeo del cohete Ainkaa 1 de 780 m sobre la superficie de lanzamiento, con una velocidad de impacto de 526 Km/h, un tiempo de quemado de 3.2s entre otros datos, para configurar esta misión dentro de la categoría de alta potencia.</p>

Currently, there are few studies on lyophilized bovine bone as a biomaterial for the manufacture of bone reconstruction implants [4] [8] [9] and these are usually focused on their manufacture, sterilization or mechanical comparison with other materials. The implants manufactured in this biomaterial have a main advantage over implants made of other materials, osteoinduction and osteoconduction, which cause the complete regeneration of the implant, eliminating the need for a second surgery to remove them. The main objective of this research article was to design and implement a guide for the manufacturing of HA2.7 screw implants; this manufacturing line includes the steps of material preparation, machining, cleaning, packaging and sterilization. In order to verify each of these stages, cytotoxicity tests, analysis of implant textures, chemical analysis, dimensional analysis, reproducibility and repetitiveness analysis of the process, and surface roughness analysis were used until the implantation of the screw as a fixation of fasciae latae implants. The surgery is based on an extraarticular repair of the anterior cruciate ligament rupture in a dog, where the behaviour of the screw was observed as its osseointegration in time until the patient recovered.

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Studies concerning the application of Porites asteroides coral for bone implant purposes have demonstrated the biological viability of its use. As a complement to previous research regarding the development of bone-powder based composite materials which are useful for such applications, this study was aimed at developing a coral powder-based composite material which would be able to satisfy the appropriate structural, mechanical and cytotoxic properties required for its use. A composite material made of coral powder, calcium sulphate powder and water was therefore developed, and its properties were tested in different compositions. The results showed how the resulting composite material had properties which were comparable to those of human cortical bone (from both a structural and mechanical point of view), as well as being non-toxic below a 0.35 mg/ml critical composite material concentration.

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