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Articles by Francisco O. Carrete Carreon
Total Records ( 2 ) for Francisco O. Carrete Carreon
  Jose Luis de la Cruz Gamez , Jose A. Toca Ramirez , Esperanza Herrera Torres , Manuel Murillo Ortiz , Juan Ramon Esparza Rivera and Francisco O. Carrete Carreon
  The positive sensory and nutritious attributes of ruminant meat have been overshadowed in recent years by the perception involving a high contribution of saturated fat to the diet with negative health effects. However along with dairy products, beef has been the largest source of Conjugated Linoleic Acid (CLA) which could have several benefits for human health. This study evaluated in laboratory data from 50 beef samples taken at random from a beef slaughtering plant of Federal Inspection type (TIF) for CLA determination, using the Gas Chromatography method (GC), the impact of factors related to animals (feeding system, feed type, sex, age, breed and origin) on the CLA proportion in the longissimusdorsi muscle. Among these factors, only significant differences (p<0.05) were found for the origin of the animals in the proportion of CLA content in different places of origin. However, intrinsic factors (breed, age, sex and type of muscle) could modulate the CLA proportion in beef from 24-47%. The specific biological properties of these isomers should determine the understanding and consequences in the variations of intramuscular CLA isomers for health of consumers.
  Jesus Herrera Corral , Martin E. Pereda Solis , Yolanda Herrera Arrieta , Francisco Gonzalez Gonzalez , Manuel Murillo Ortiz , Francisco O. Carrete Carreon , Armando Cortez Ortiz and Norma Almaraz Abarca
  The aim of this study was to estimate stocking rate in open grassland considering its primary productivity, diet quality and voluntary intake of beef cattle. To achieve this, the methodology and systems analysis approach was used. By means of the Stella 8.0 simulation program a model was developed whose predictions show an 11% of difference in the actual primary productivity respect to that estimated of 3 years with different precipitation. In the study period, the stocking rate estimated in 2000 ha in the study period according to dry matter intake, crude protein and metabolizable energy ranged between 248-663, 233-823 and 297-758 animal units, respectively. The monthly stocking rate average estimated by the model base on produced dry matter and protein crude and metabolizable energy was 247.4, 289.5 and 321.54 animal units, respectively. Stocking rate and stocking coefficient predicted by the model indicate that assigning the hectares per animal unit will meet the needs of dry matter intake but there is a deficiency of crude protein and metabolizable energy when the mean annual precipitation is equal or lower to average.
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