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La glándula tiroides está presente en todos los vertebrados y es única entre las glándulas endocrinas en que almacena sus productos de secreción (hormonas tiroidales) extracelularmente. Estas hormonas juegan un papel indispensable en una variedad de reacciones bioquímicas en tejidos periféricos c...

The thyroid gland is present in all vertebrates and it is unique among endocrine glands in that it stores its secretory products (the thyroid hormones) extracellularly. These hormones play an indispensable role in a variety of biochemical reactions at the level of peripheral tissues such as the s...


Matamoros, RobertoContreras, P.A.Wittwer, F.Mayorga, M.I[Hypothyroidism in ruminants][Hipotiroidismo en rumiantes]Hipotiroidismo en rumiantes

Pastures in the south of Chile have been shown to be selenium deficient, and as selenium is a component of deiodinase type 1, which is necessary for the synthesis of triiodothyronine (T3) at peripheral levels, the effect of selenium deficiency on the blood concentration of theses hormones in cows...


Contreras, P.A.Matamoros, RobertoMonroy, R.Kruze, J.Leyán, V.Andaur Rademacher, MarcelaBohmwald, H.Wittwer, F.[Effect of a selenium-deficient diet on blood values of T3 and T4 in cows]Effect of a selenium-deficient diet on blood values of T3 and T4 in cows

The objective of this study was to characterize dairy productive systems of Vilcún commune, Cautín province, the IXth Region, Chile, linking qualitative and quantitative variables using statistical multivariate analysis of simple correspondence. 24 dairy farms were analyzed: 11 considered small s...


Avilez Ruíz, Juan PabloEscobar Bahamondes, PaulVon Fabeck, G.Villagrán, K.García, F.Matamoros, RobertoMartínez, A.G.[Caracterización productiva de explotaciones lecheras empleando metodología de análisis multivariado][Productive characterization of milk farms using multivariate analysis]Productive characterization of milk farms using multivariate analysis

Se comparó el desarrollo in vitro de ovocitos obtenidos de ovarios de vaca de matadero, madurados, fecundados y cultivados in vitro bajo dos sistemas. Los ovocitos fueron cultivados en un medio de maduración a 39 °C, 5 % de CO2 y humedad relativa de 95 % durante 22 horas. Posteriormente, fuer...

The in vitro development of matured and fertilized bovine oocytes was compared between two culture systems. Oocytes were collected by aspiration of follicles of 3-8 mm in diameter using an 18g needle. After morphological selection the oocytes were incubated at 39 0C, 5 % C02 y 95 % relative humid...


Ratto Fuster, MarceloBerland Olea, MarcoWolter, M.Matamoros, Roberto[Desarrollo de embriones de bovino obtenidos por fecundación in vitro cultivados con células oviductales o medio condicionado y transferidos a hembras receptoras][Bovine embryo development produced by in vitro fertilization cultured with oviductal cell or conditioned medium and transfer to recipients]Bovine embryo development produced by in vitro fertilization cultured with oviductal cell or conditioned medium and transfer to recipients

The objective of this study was to characterize dairy productive systems of Vilcun commune, Cautin province, the IXth Region, Chile, linking qualitative and quantitative variables using statistical multivariate analysis of simple correspondence. 24 dairy farms were analyzed: 11 considered small s...


Aviléz Ruiz, JuanEscobar Bahamondes, PaulVon Fabeck, GabrielleVillagran, KarenGarcia, FernandoMatamoros, RobertoGarcia Martinez, Anton[Productive Characterization of Milk Farms Using Multivariate Analysis]Productive Characterization of Milk Farms Using Multivariate Analysis

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