Avaliação de diferentes métodos de colheita de embriões bovinos.

Edição dos resumos da 20. Reunião Anual da Sociedade Brasileira de Tecnologia de Embriões, Araxá, MG, agosto 2006

Avaliação da influência do flunixin meglumine sobre os níveis séricos de progesterona em novilhas e vacas mestiças.

Edição dos resumos da 20. Reunião Anual da Sociedade Brasileira de Tecnologia de Embriões, Araxá, MG, agosto 2006

Avaliação dos efeitos do flunixim meglumine sobre a concentração sérica de progesterona e ciclo estral em novilhas e vacas mestiças.

Resumo: Baseando-se nos mecanismos de interrupção da síntese de PGF2a em bovinos, objetivou-se com este estudo avaliar os efeitos do flunixin meglumine (FM) sobre o comprimento do ciclo estral e sobre os níveis de progesterona, em novilhas e vacas mestiças. Após sincronização dos estros, os animais foram divididos em grupos: controle (cinco vacas e quatro novilhas) e tratado (seis vacas e seis novilhas), sendo submetidos à colheita diária de sangue, até o estro subseqüente. Do 13o ao 18o dia, aplicou-se nos animais do grupo tratado 1,65 mg/kg intramuscular de FM, e nos do grupo controle, mesmo volume de solução fisiológica. A determinação da concentração sérica de progesterona foi realizada por RIA. Os resultados do comprimento do ciclo estral foram comparados entre os grupos e entre animais, pelo teste t de Student, enquanto a concentração de progesterona foi normalizada em relação à luteólise, e analisada entre os grupos pelo teste t de Tukey (SAS). Não se observou diferença (P>0,05) no comprimento do ciclo estral entre grupos e entre novilhas e vacas, tratadas e não tratadas. O dia do ciclo estral em relação à concentração de progesterona máxima e inferior a 1,0ng/mL, e a concentração sérica de progesterona entre os animais do grupo controle e tratado, também foram semelhantes entre os grupos (P>0,05). No entanto, observou-se diferença (P0.05). However, there was no difference concerning the concentration of progesterone decrease among theexperimental groups. It was concluded that, under the conditions this study was carried out, even though the effect of the treatment was observed, its action would be better characterized if the sample population were bigger.(AU

Channeling Effects In High-energy Implantation of N+ In Silicon

Nitrogen implantation of Si single crystals in the 600 keV to 1.4 MeV energy range in random, and alignment conditions on cut silicon wafers was performed. The 6 x 10(13) - 2 x 10(16) cm-2 fluence range was investigated. The beam alignment along the various axial directions was precisely checked by monitoring the backscattered nitrogen signal. RBS-channeling analysis was performed in order to measure the damage profiles. The nitrogen concentration profiles were analyzed by SIMS in all the implanted samples. The behaviour of the channeled component and the amorphization process was studied as a function of the dose for all the implantation orientations. The energy loss of the channeled ions was also estimated

Determination of the sodium monofluoroacetate in serum by gas chromatography

Sodium monofluoroacetate (NAFAc) has been widely used for vertebrate pest control, such as rabbits in Australia. However NAFAc is extremely toxic to all vertebrates and its use is restricted. Although this compound is stringently restricted, the occurrence of accidental and homicidal poisoning is no ever-present possibility.The method developed in this work shows the applicability of SPE with alumina cartridges for the extraction of NAFAc from serum samples. The method is efficient with recoveries of at least 96.8% from spiked serum. The samples were subsequently derivatized with dicyclohexylcabodiimide (DCC), using 2,4-dichloroaniline (DCA), to make the product volatile for GC analysis

Alterações morfológicas nos órgãos genitais de cães e gatos provenientes de vilas rurais na região de Umuarama, PR.

Edição dos resumos da 20. Reunião Anual da Sociedade Brasileira de Tecnologia de Embriões, Araxá, MG, agosto 2006

An Interdisciplinary Capstone Design Experience on Critical Embedded Systems using Agile Methods

International audienceThis paper relates a capstone design project conceived through an engineering problem-based learning approach. The project is applied to critical embedded systems and the Scrum Agile method is used. The focus of the paper is on the pedagogical experience, so the Intended Learning Outcomes and pedagogical sequence over one semester are presented. Two platforms (the Parrot AR.Drone 2 and a toy car) were used for the project. Pros and cons of such platforms are debated. Tools like Git for the version control and iceScrum for the Agile management are presented. The different roles of teachers as clients, counselors, and evaluators are detailed. This paper shows that an interdisciplinary teaching team is very important in this kind of project, so is the teachers' engagement in the Agile philosophy. Feedback, analyses and some suggested improvements are given, based on our 5 years' experience in such projects and surveys.Cet article relate notre expérience de mise en oeuvre d’un apprentissagebasé sur la résolution de problèmes d’ingénierie au travers d’unprojet interdisciplinaire. Ce projet a pour domaine d’application lessystèmes embarqués critiques. La méthode agile Scrum est utiliséecomme méthode de gestion de projet. L’article porte principalement sur notre expérience pédagogique : il présente les acquis d’apprentissagevisés et la séquence pédagogique tout au long du semestre.Deux plates-formes (le Parrot AR.Drone 2 et une voiturette pour enfants)ont été successivement utilisées pour ce projet. Les avantageset les inconvénients des deux plates-formes sont débattus. Des outilstels que Git pour le contrôle de version et iceScrum pour la gestionagile sont présentés. Les différents rôles des enseignants en tantque clients, conseillers et évaluateurs sont détaillés. Cet article montrequ’une équipe pédagogique interdisciplinaire est très importante dansce type de projet, de même que l’engagement des enseignants dans laphilosophie Agile. L’article donne un retour d’expériences, des analysessur les résultats obtenus, des suggestions d’amélioration sur la base denos cinq années d’expérience et sur des sondages effectués auprès desdifférentes cohortes d’étudiants.Mots-clés : projet interdisciplinaire, systèmes embarqués, méthode agile,apprentissage par résolution de problèmes d’ingénieri