With the aim to evaluate the effect of ivermectin 2.25% + abamectin 1.25% in the reduction of gas... more With the aim to evaluate the effect of ivermectin 2.25% + abamectin 1.25% in the reduction of gastrointestinal nematodes eggs per gram (epg) and the weight gain in bovines in 90 days, twenty four Santa Gertrudis breed, weaned calves localized in a ranch in Malpaso, Tecpatan municipality, Chiapas, Mexico, with a warm humid climate, were used. The calves were in
In order to evaluate the effect of cutting height (9, 12, and 15 cm) and frequency (3, 4, and 5 w... more In order to evaluate the effect of cutting height (9, 12, and 15 cm) and frequency (3, 4, and 5 wk -rainy season- and 5, 6 and 7 wk -dry and windy seasons) a randomized block design with a 3x3 factorial arrangement and three replicates was used to study Brachiaria humidicola attributes: herbage accumulation, growth rate (GR), leaf mass (LM),
The objective of this study was to measure Insurgente grass regrowth (total forage, forage compon... more The objective of this study was to measure Insurgente grass regrowth (total forage, forage component and shoots) grazed at different green leaf allowances, by means of a rotational grazing scheme having fixed rest periods, in the rainy season. Forage was grazed under three different allowances: 3, 5 and 7 kg dry matter (leaf) per 100 kg live weight -1 day
Informe financiado por Merck, Sharp & Dohme España, S.A El estudio evalúa diversas formas de intr... more Informe financiado por Merck, Sharp & Dohme España, S.A El estudio evalúa diversas formas de introducir ayudas visuales para comunicar riesgos en los prospectos de los medicamentos, frente a la situación actual.
Forage production was determined for the gramineae Brachiaria dictyoneura, B. brizantha (cv. Tole... more Forage production was determined for the gramineae Brachiaria dictyoneura, B. brizantha (cv. Toledo) and B. ruziziensis x B. brizantha (cv. Mulato) as monocrops as well as in association with the legume Arachis pintoi. Experimental design was completely random blocks with four replications. Measured variables included forage dry matter production; growth rate; botanical and morphological composition; tiller density; and tiller weight.
The sprayed concrete, which is widely used in underground constructions, requires a quick setting... more The sprayed concrete, which is widely used in underground constructions, requires a quick setting obtained by using set accelerating admixtures. Due to the current importance of this special concrete, an analysis of its mechanical properties derived from the incorporation of these admixtures is essential. The European Standard ‘EN 196-1 – Methods of testing cement. Part 1: Determination of strength’ describes the methodology to determinate the strength of common mortars. The Standard entails to analyse the results obtained statistically so as to check the validity of the test performed. This analysis consists of eliminating the result with the highest deviation from the average if such deviating is bigger than 10%. After eliminating this data, the average is estimated again and the same procedure is repeated. The test must not be considered valid if another result follows outside the 10% deviation range. The aim of this paper is to adapt the European Standard so that it could be use...
The objective of the present study was to evaluate herbage accumulation, morphological compositio... more The objective of the present study was to evaluate herbage accumulation, morphological composition, growth rate and structural characteristics in Mombasa grass swards subject to different cutting intervals (3, 5 and 7 wk) during the rainy and dry seasons of the year. Treatments were assigned to experimental units (17.5 m2) according to a complete randomised block design, with four replicates. Herbage
This paper proposes a method for determining the values of the individual tolerances of the parts... more This paper proposes a method for determining the values of the individual tolerances of the parts that form the assembly and satisfying the tolerance imposed for the component, optimizing the total manufacturing cost bearing in mind the cost functions based on the process. It starts with the main work done in the line of tolerance allocation and proposes the work model, which it is based on the optimization of costs from the implementation of the method of Lagrange multipliers to various cost-tolerance curves.
This paper presents the problems of the deployment of telecommunication networks and the role of ... more This paper presents the problems of the deployment of telecommunication networks and the role of public policies in order to fulfil the Digital Agenda for Europe targets regarding basic broadband universal service for 2013 and the 30 Mbps universal availability for 2020 for the case of Spain. The impact of issues as the universal service declaration, reframing process and access
Irradiated eggs of Anastrepha ludens were evaluated as hosts of two fruit-fly parasitoids for mas... more Irradiated eggs of Anastrepha ludens were evaluated as hosts of two fruit-fly parasitoids for mass rearing. Three different ages of A. ludens eggs (24-, 48- and 72-h-old) were analyzed for hatchability after being subjected to radiation doses of 2.5, 5, 7.5, 10, 12.5, 15, 17.5, 20, 22.5, 25, 27.5 and 30 Gy. No significant reduction in hatchability occurred with the
IntroductionConvulsive status epilepticus constitutes a medical emergency that requires a fast an... more IntroductionConvulsive status epilepticus constitutes a medical emergency that requires a fast and aggressive management with the objective to prevent neuronal damage and systemic complications. The objective is to determine clinico-epidemiologic characteristics and risk factors associated with convulsive status epilepticus in adults attended in a National Hospital from Lima-Peru in a period of four years.
With the aim to evaluate the effect of ivermectin 2.25% + abamectin 1.25% in the reduction of gas... more With the aim to evaluate the effect of ivermectin 2.25% + abamectin 1.25% in the reduction of gastrointestinal nematodes eggs per gram (epg) and the weight gain in bovines in 90 days, twenty four Santa Gertrudis breed, weaned calves localized in a ranch in Malpaso, Tecpatan municipality, Chiapas, Mexico, with a warm humid climate, were used. The calves were in
In order to evaluate the effect of cutting height (9, 12, and 15 cm) and frequency (3, 4, and 5 w... more In order to evaluate the effect of cutting height (9, 12, and 15 cm) and frequency (3, 4, and 5 wk -rainy season- and 5, 6 and 7 wk -dry and windy seasons) a randomized block design with a 3x3 factorial arrangement and three replicates was used to study Brachiaria humidicola attributes: herbage accumulation, growth rate (GR), leaf mass (LM),
The objective of this study was to measure Insurgente grass regrowth (total forage, forage compon... more The objective of this study was to measure Insurgente grass regrowth (total forage, forage component and shoots) grazed at different green leaf allowances, by means of a rotational grazing scheme having fixed rest periods, in the rainy season. Forage was grazed under three different allowances: 3, 5 and 7 kg dry matter (leaf) per 100 kg live weight -1 day
Informe financiado por Merck, Sharp & Dohme España, S.A El estudio evalúa diversas formas de intr... more Informe financiado por Merck, Sharp & Dohme España, S.A El estudio evalúa diversas formas de introducir ayudas visuales para comunicar riesgos en los prospectos de los medicamentos, frente a la situación actual.
Forage production was determined for the gramineae Brachiaria dictyoneura, B. brizantha (cv. Tole... more Forage production was determined for the gramineae Brachiaria dictyoneura, B. brizantha (cv. Toledo) and B. ruziziensis x B. brizantha (cv. Mulato) as monocrops as well as in association with the legume Arachis pintoi. Experimental design was completely random blocks with four replications. Measured variables included forage dry matter production; growth rate; botanical and morphological composition; tiller density; and tiller weight.
The sprayed concrete, which is widely used in underground constructions, requires a quick setting... more The sprayed concrete, which is widely used in underground constructions, requires a quick setting obtained by using set accelerating admixtures. Due to the current importance of this special concrete, an analysis of its mechanical properties derived from the incorporation of these admixtures is essential. The European Standard ‘EN 196-1 – Methods of testing cement. Part 1: Determination of strength’ describes the methodology to determinate the strength of common mortars. The Standard entails to analyse the results obtained statistically so as to check the validity of the test performed. This analysis consists of eliminating the result with the highest deviation from the average if such deviating is bigger than 10%. After eliminating this data, the average is estimated again and the same procedure is repeated. The test must not be considered valid if another result follows outside the 10% deviation range. The aim of this paper is to adapt the European Standard so that it could be use...
The objective of the present study was to evaluate herbage accumulation, morphological compositio... more The objective of the present study was to evaluate herbage accumulation, morphological composition, growth rate and structural characteristics in Mombasa grass swards subject to different cutting intervals (3, 5 and 7 wk) during the rainy and dry seasons of the year. Treatments were assigned to experimental units (17.5 m2) according to a complete randomised block design, with four replicates. Herbage
This paper proposes a method for determining the values of the individual tolerances of the parts... more This paper proposes a method for determining the values of the individual tolerances of the parts that form the assembly and satisfying the tolerance imposed for the component, optimizing the total manufacturing cost bearing in mind the cost functions based on the process. It starts with the main work done in the line of tolerance allocation and proposes the work model, which it is based on the optimization of costs from the implementation of the method of Lagrange multipliers to various cost-tolerance curves.
This paper presents the problems of the deployment of telecommunication networks and the role of ... more This paper presents the problems of the deployment of telecommunication networks and the role of public policies in order to fulfil the Digital Agenda for Europe targets regarding basic broadband universal service for 2013 and the 30 Mbps universal availability for 2020 for the case of Spain. The impact of issues as the universal service declaration, reframing process and access
Irradiated eggs of Anastrepha ludens were evaluated as hosts of two fruit-fly parasitoids for mas... more Irradiated eggs of Anastrepha ludens were evaluated as hosts of two fruit-fly parasitoids for mass rearing. Three different ages of A. ludens eggs (24-, 48- and 72-h-old) were analyzed for hatchability after being subjected to radiation doses of 2.5, 5, 7.5, 10, 12.5, 15, 17.5, 20, 22.5, 25, 27.5 and 30 Gy. No significant reduction in hatchability occurred with the
IntroductionConvulsive status epilepticus constitutes a medical emergency that requires a fast an... more IntroductionConvulsive status epilepticus constitutes a medical emergency that requires a fast and aggressive management with the objective to prevent neuronal damage and systemic complications. The objective is to determine clinico-epidemiologic characteristics and risk factors associated with convulsive status epilepticus in adults attended in a National Hospital from Lima-Peru in a period of four years.
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Papers by Jorge Pérez