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Articles by Manuel Murillo Ortiz
Total Records ( 3 ) for Manuel Murillo Ortiz
  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.
  M. Guadalupe Villarreal Rodriguez , Esperanza Herrera Torres , Evaristo Alvarez Mendoza and Manuel Murillo Ortiz
  The purpose of this research was to determined if the 227 ha used in the cultivated soils of the five different stables destined for the production of milk and specimens of the Holstein Friestan stock found in Guadiana valley in Durango are affected by the well waters used in irrigation and the residual waters of the automatic milking process. The variables of the study included: apparent density (Da), total Nitrogen (N), Phosphorus (P), potassium (K), sodium (Na), Calcium (Ca) and Magnesium (Mg). The experimental period consisted of 3 consecutive days in each of the production units using the method of cutting for the recollection of the samples consisting of soil, for its future analysis in a lab. The obtained results were processed through the program of statistics (SAS) Version 8 with a module completely at random. Analyzing the results between each stable the variable measurements can be observed in the tables from 1 through 5. The variables found in the comparison between the five production units were: density, the stable with the highest amount was stable 2 and the stable with the least was the stable 1 with a difference between the stables of high significance; recorded in the table provided (p<0.05). Nitrogen was another element present in the stables with the highest number was the first stable and the one with the lowest was the third stable with a difference between stables of p<0.05. Phosphorous appeared in the stables with the highest measurements found in the fourth stable and the slightest was the first stable with a difference between stables of highly significant readings (p<0.05). Sodium in the stables appeared with the highest number in the first stable and the tiny amount in the third stable with a difference that was significant (p<0.05). In the meantime, the correlation showed the following results: the highest correlation (0.95715) appeared between the magnesium and the calcium which results in a significant number (p<0.01). A significant correlation (p<0.05) between the variales of total nitrogen and potassium with a value of 0.58496 appear in the findings.
 
 
 
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