Pub Date : 2022-12-31DOI: 10.35429/jsl.2022.27.9.14.19
Luis Kevin Pacheco-Alvarado, Ana Lilia González-Monzón, Henry Christopher Piña-Alcántara, León Guillermo Torres-Arreola
The present work consists of the development of a control system by means of a microprocessor for a prototype of engraving of non-metallic materials using a semiconductor laser, which has the purpose of carrying out said process without the use of any image processing software as they do. other common marketing devices. This prototype is based on a Cartesian positioning robot, built with a 20mm structural aluminum profile, a 450nm wavelength laser module at 1W of power adjustable by PWM pulse width modulation, 3 motors with Nema 17 bipolar steps, an ATMega2560 microcontroller and a CNC shield card. As a result, we obtain a prototype of a laser engraver with a microcontroller control system, which according to the tests carried out has an efficiency of 95%, capable of carrying out a maximum of 27 engraving processes every 60 minutes with a 30-minute break and that does not use image processing software.
{"title":"Control of a CNC laser engraver machine for non-metallic materials","authors":"Luis Kevin Pacheco-Alvarado, Ana Lilia González-Monzón, Henry Christopher Piña-Alcántara, León Guillermo Torres-Arreola","doi":"10.35429/jsl.2022.27.9.14.19","DOIUrl":"https://doi.org/10.35429/jsl.2022.27.9.14.19","url":null,"abstract":"The present work consists of the development of a control system by means of a microprocessor for a prototype of engraving of non-metallic materials using a semiconductor laser, which has the purpose of carrying out said process without the use of any image processing software as they do. other common marketing devices. This prototype is based on a Cartesian positioning robot, built with a 20mm structural aluminum profile, a 450nm wavelength laser module at 1W of power adjustable by PWM pulse width modulation, 3 motors with Nema 17 bipolar steps, an ATMega2560 microcontroller and a CNC shield card. As a result, we obtain a prototype of a laser engraver with a microcontroller control system, which according to the tests carried out has an efficiency of 95%, capable of carrying out a maximum of 27 engraving processes every 60 minutes with a 30-minute break and that does not use image processing software.","PeriodicalId":192509,"journal":{"name":"Revista de Simulación y Laboratorio","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134243005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.35429/jsl.2022.27.9.29.35
Javier Ramírez-Martínez, J. Pacheco-Aguilar
Phytopathogenic fungi are one of the main causes of diseases that affect agricultural production. For their control, in recent years, biological alternatives have been developed, such as the use of antagonistic microorganisms that produce inhibitory molecules towards these fungi, exerting a biocontrol effect. In the present study, Bacillus licheniformis Q19 and Bacillus subtilis Q20 strains were characterized for their ability to inhibit in vitro the mycelial growth of Rhizoctonia solani, Fusarium oxysporum, Sclerotium rolfsii, Colletotrichum gloesporoides and Phytophthora spp. The results of dual cultures show that only Q20 inhibited the pathogens in a range from 33.3 to 50.6 %, being A. alternata who presented the greatest inhibition. A positive test for hemolysis, which is related to the lipopeptide production, indicates that these molecules could probably be involved in the fungal inhibition. Later, assays in plates overlapping, where the study microorganisms are not in the same culture médium, showed that Q19 and Q20 produce volatile compunds, capable of inhibiting A. alternata and S. rolfsii by 72.4 and 56.3 %, respectively. In conclusion, Q19 and Q20 produce lipopeptides and/or volatile compounds with activity against phythopathogenic fungi as biocontrol mechanisms.
{"title":"Production of volatile compounds and lipopeptides as antagonistic mechanisms of two Bacillus strains towards phytopathogenic fungi","authors":"Javier Ramírez-Martínez, J. Pacheco-Aguilar","doi":"10.35429/jsl.2022.27.9.29.35","DOIUrl":"https://doi.org/10.35429/jsl.2022.27.9.29.35","url":null,"abstract":"Phytopathogenic fungi are one of the main causes of diseases that affect agricultural production. For their control, in recent years, biological alternatives have been developed, such as the use of antagonistic microorganisms that produce inhibitory molecules towards these fungi, exerting a biocontrol effect. In the present study, Bacillus licheniformis Q19 and Bacillus subtilis Q20 strains were characterized for their ability to inhibit in vitro the mycelial growth of Rhizoctonia solani, Fusarium oxysporum, Sclerotium rolfsii, Colletotrichum gloesporoides and Phytophthora spp. The results of dual cultures show that only Q20 inhibited the pathogens in a range from 33.3 to 50.6 %, being A. alternata who presented the greatest inhibition. A positive test for hemolysis, which is related to the lipopeptide production, indicates that these molecules could probably be involved in the fungal inhibition. Later, assays in plates overlapping, where the study microorganisms are not in the same culture médium, showed that Q19 and Q20 produce volatile compunds, capable of inhibiting A. alternata and S. rolfsii by 72.4 and 56.3 %, respectively. In conclusion, Q19 and Q20 produce lipopeptides and/or volatile compounds with activity against phythopathogenic fungi as biocontrol mechanisms.","PeriodicalId":192509,"journal":{"name":"Revista de Simulación y Laboratorio","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116556162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-12-31DOI: 10.35429/jsl.2022.27.9.20.28
Jesus Rodriguez-Avila, J. Valle-Hernandez, J. M. Gallardo-Villarreal
Currently the generation of energy in space is of vital importance for research on other planets and moons, as all missions sent are powered by electricity so that they keep all their instruments operating properly and present no short-term problems. For the generation of energy outside the planet earth are presented the power converters which are able to convert thermal energy into electrical energy, currently there are two types of power converters which are dynamic and static, for this work are addressed the static, also called thermoelectric that work from a physical phenomenon called seebeck effect which USES two metals of different composition united, They take advantage of a temperature gradient where one end is kept at a hot temperature and the other at a cold temperature, causing a voltage differential. For a material to be considered thermoelectric and work properly has to have some properties such as the seebeck coefficient, electrical resistivity and thermal conductivity, in this work we study some thermoelectrics used in the aerospace sector which are Bi_2 Te_3, PbTe, SiGe, Skutterudite and BiSbTe Where its thermoelectric properties will be analyzed according to its operating temperature range, the merit figure zt will be calculated, the electrical power generated, the input heat and the output heat, finally a comparative table of the electrical power generated by the static converters and another of its applications in the space sector will be performed. This work provides information on the most used thermoelectrics in the space sector, as well as the physical phenomena involved in static converters.
{"title":"Analysis of thermoelectrics used in the aerospace industry for power generation by the seebeck effect","authors":"Jesus Rodriguez-Avila, J. Valle-Hernandez, J. M. Gallardo-Villarreal","doi":"10.35429/jsl.2022.27.9.20.28","DOIUrl":"https://doi.org/10.35429/jsl.2022.27.9.20.28","url":null,"abstract":"Currently the generation of energy in space is of vital importance for research on other planets and moons, as all missions sent are powered by electricity so that they keep all their instruments operating properly and present no short-term problems. For the generation of energy outside the planet earth are presented the power converters which are able to convert thermal energy into electrical energy, currently there are two types of power converters which are dynamic and static, for this work are addressed the static, also called thermoelectric that work from a physical phenomenon called seebeck effect which USES two metals of different composition united, They take advantage of a temperature gradient where one end is kept at a hot temperature and the other at a cold temperature, causing a voltage differential. For a material to be considered thermoelectric and work properly has to have some properties such as the seebeck coefficient, electrical resistivity and thermal conductivity, in this work we study some thermoelectrics used in the aerospace sector which are Bi_2 Te_3, PbTe, SiGe, Skutterudite and BiSbTe Where its thermoelectric properties will be analyzed according to its operating temperature range, the merit figure zt will be calculated, the electrical power generated, the input heat and the output heat, finally a comparative table of the electrical power generated by the static converters and another of its applications in the space sector will be performed. This work provides information on the most used thermoelectrics in the space sector, as well as the physical phenomena involved in static converters.","PeriodicalId":192509,"journal":{"name":"Revista de Simulación y Laboratorio","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124791352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-30DOI: 10.35429/jsl.2022.26.9.9.17
Carina Ivonne Canul-Cemé, Ricardo Conejo-Flores, J. García-González, J. Guzmán-Pantoja
The environmental problems caused by carbon dioxide emissions, as well as its accumulation in the atmosphere, have forced the scientific community to implement methods to reduce said emissions, as well as to seek alternatives for their use, one of which is in the chemical synthesis; simultaneously, catalysts with various materials that facilitate their activation have been developed. The following research paper presents the synthesis of catalysts for obtaining acrylic acid from carbon dioxide and ethylene. The materials used are transition metals: nickel and cobalt, from the salts NiSO4•(NH4)2SO4•6H2O (ammonium sulfate and nickel hexahydrate) and CoCl2•6H2O (cobalt chloride hexahydrate). During the procedure, nickel is impregnated in a polymeric material and absorbed in a clayey material; both metals are subjected to a chemical reduction process. To verify the composition of the material, a scanning electron microscopy/X-ray energy dispersive spectrometry analysis was performed for allthe obtained materials. The results presented here are initial in the research, so the reaction to obtain the acrylic acid is not yet studied in depth. The proposed materials and gathered information are a good starting point for future research.
{"title":"Preparation of catalytic materials for obtaining Acrylic Acid from Ethylene and Carbon Dioxide","authors":"Carina Ivonne Canul-Cemé, Ricardo Conejo-Flores, J. García-González, J. Guzmán-Pantoja","doi":"10.35429/jsl.2022.26.9.9.17","DOIUrl":"https://doi.org/10.35429/jsl.2022.26.9.9.17","url":null,"abstract":"The environmental problems caused by carbon dioxide emissions, as well as its accumulation in the atmosphere, have forced the scientific community to implement methods to reduce said emissions, as well as to seek alternatives for their use, one of which is in the chemical synthesis; simultaneously, catalysts with various materials that facilitate their activation have been developed. The following research paper presents the synthesis of catalysts for obtaining acrylic acid from carbon dioxide and ethylene. The materials used are transition metals: nickel and cobalt, from the salts NiSO4•(NH4)2SO4•6H2O (ammonium sulfate and nickel hexahydrate) and CoCl2•6H2O (cobalt chloride hexahydrate). During the procedure, nickel is impregnated in a polymeric material and absorbed in a clayey material; both metals are subjected to a chemical reduction process. To verify the composition of the material, a scanning electron microscopy/X-ray energy dispersive spectrometry analysis was performed for allthe obtained materials. The results presented here are initial in the research, so the reaction to obtain the acrylic acid is not yet studied in depth. The proposed materials and gathered information are a good starting point for future research.","PeriodicalId":192509,"journal":{"name":"Revista de Simulación y Laboratorio","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124077471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-30DOI: 10.35429/jsl.2022.26.9.18.30
Claudio Alberto Moreno-Arias, Oscar Chamarraví-Guerra, Fernando De Jesús Lopéz-Maza
Waste tires, composed of rubber, have caused negative environmental problems. There have been problems regarding an increase in the accumulation of tires in different sectors, together with the fact that waste management methods are obsolete. These problems have awakened interest in their study and thermal degradation. Tires composed of rubber represent a material with an important potential for recycling and utilization, together with the conversion of these wastes into energy, value-added products or for the improvement of raw materials. The technique used to carry out thermal degradation is called pyrolysis and consists of heating the organic matter in the absence of oxygen at a specified rate or heating rate, up to a maximum temperature known as pyrolysis temperature, and maintaining it there for a specified time. The products of pyrolysis correspond to: liquid, condensable gases and solid char or ash; for its part, the condensable gas can be further decomposed into non-condensable gases (〖CO, CO2, H2 and CH4), liquid and char. This work aims to contribute with the design and simulation of the condensation cycle of the gases obtained from pyrolysis. Particularly, for the condensation of these gases, the ASPEN HYSYS process simulator was used, where the adaptation of a shell and tube heat exchanger allowed to carry out the condensation. The feed containing these gases comes from tests in a pyrolytic reactor with favorable results. As a result of this condensation and the operating conditions, it is observed that, for a range between 80 and 90 °C, the condensation of gases such as i-Butene and Propylene is favored. This study aims to take up existing research in this area and make a proposal for the condensation of pyrolysis gases, generating an idea of the feasibility and recovery of tire waste with a circular economy approach.
{"title":"Simulation of gas condensation process from pyrolysis of used tires","authors":"Claudio Alberto Moreno-Arias, Oscar Chamarraví-Guerra, Fernando De Jesús Lopéz-Maza","doi":"10.35429/jsl.2022.26.9.18.30","DOIUrl":"https://doi.org/10.35429/jsl.2022.26.9.18.30","url":null,"abstract":"Waste tires, composed of rubber, have caused negative environmental problems. There have been problems regarding an increase in the accumulation of tires in different sectors, together with the fact that waste management methods are obsolete. These problems have awakened interest in their study and thermal degradation. Tires composed of rubber represent a material with an important potential for recycling and utilization, together with the conversion of these wastes into energy, value-added products or for the improvement of raw materials. The technique used to carry out thermal degradation is called pyrolysis and consists of heating the organic matter in the absence of oxygen at a specified rate or heating rate, up to a maximum temperature known as pyrolysis temperature, and maintaining it there for a specified time. The products of pyrolysis correspond to: liquid, condensable gases and solid char or ash; for its part, the condensable gas can be further decomposed into non-condensable gases (〖CO, CO2, H2 and CH4), liquid and char. This work aims to contribute with the design and simulation of the condensation cycle of the gases obtained from pyrolysis. Particularly, for the condensation of these gases, the ASPEN HYSYS process simulator was used, where the adaptation of a shell and tube heat exchanger allowed to carry out the condensation. The feed containing these gases comes from tests in a pyrolytic reactor with favorable results. As a result of this condensation and the operating conditions, it is observed that, for a range between 80 and 90 °C, the condensation of gases such as i-Butene and Propylene is favored. This study aims to take up existing research in this area and make a proposal for the condensation of pyrolysis gases, generating an idea of the feasibility and recovery of tire waste with a circular economy approach.","PeriodicalId":192509,"journal":{"name":"Revista de Simulación y Laboratorio","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127072237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-30DOI: 10.35429/jsl.2022.26.9.31.39
Gerardo Diaz Espinoza, J. Valle-Hernandez, J. M. Gallardo Villarreal
The latest proposal for nuclear systems for application in space are 4th generation reactors that use liquid metals as coolant. The operating conditions, as well as its safety in these matters, is linked to its thermal and fluid dynamic behavior. This paper presents the estimation of the temperature profile of a sodium-cooled fast reactor from the conduction and convection heat transfer mechanisms. The temperature distribution is analyzed in the area of the fuel and the temperature profile of the coolant in the area of the high conductivity pipes. Is established the analysis of nuclear fuel in a one-dimensional, stationary and with power generation. In the GAP area, the analysis is carried out by natural convection, and finally, the cladding in contact with sodium by forced conduction-convection. As results, it is presented the simulation in Computational Fluid Dynamics to determine the temperature profile due to the behavior of the coolant in the pipe when subjected to a constant flow of heat supplied by the nuclear fuel pellets. The temperature profile will allow us to determine the parameters to establish the operating conditions of secondary power conversion systems.
{"title":"Temperature Profile Estimation in the Core of a Sodium-Cooled Fast Reactor using CFD Modeling","authors":"Gerardo Diaz Espinoza, J. Valle-Hernandez, J. M. Gallardo Villarreal","doi":"10.35429/jsl.2022.26.9.31.39","DOIUrl":"https://doi.org/10.35429/jsl.2022.26.9.31.39","url":null,"abstract":"The latest proposal for nuclear systems for application in space are 4th generation reactors that use liquid metals as coolant. The operating conditions, as well as its safety in these matters, is linked to its thermal and fluid dynamic behavior. This paper presents the estimation of the temperature profile of a sodium-cooled fast reactor from the conduction and convection heat transfer mechanisms. The temperature distribution is analyzed in the area of the fuel and the temperature profile of the coolant in the area of the high conductivity pipes. Is established the analysis of nuclear fuel in a one-dimensional, stationary and with power generation. In the GAP area, the analysis is carried out by natural convection, and finally, the cladding in contact with sodium by forced conduction-convection. As results, it is presented the simulation in Computational Fluid Dynamics to determine the temperature profile due to the behavior of the coolant in the pipe when subjected to a constant flow of heat supplied by the nuclear fuel pellets. The temperature profile will allow us to determine the parameters to establish the operating conditions of secondary power conversion systems.","PeriodicalId":192509,"journal":{"name":"Revista de Simulación y Laboratorio","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133347795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-30DOI: 10.35429/jsl.2022.26.9.1.8
José María Aguilera-Méndez, Carlos Juárez-Toledo, Juan Roberto Calderón-Maya, Irma Martínez-Carrillo
Storm surge is a phenomenon that occurs on coasts with a higher incidence in the rainy season. The factors that promote its appearance are the wind and the tide whose force has been sometimes catastrophic. The objective of the study is to provide a storm surge forecast using the SWASH numerical model for some points on the Mexican Pacific coast. The approach of the experiment refers to previous works that use the infrastructure and data available from NOAA and SEMAR; the use of unstructured meshes used in a wave model to conclude in a beach wave model. In the validation of the results, the tide gauges of the study locations will be used; with the feedback obtained, the necessary adjustments are expected until the model has at least 60% correct measurements. Some authors agree that global warming affects the power with which the phenomenon has been manifesting itself, so that the development of technology could help minimize the consequences.
{"title":"Storm surge forecast calculus on the Mexican Pacific coast using SWASH numerical model","authors":"José María Aguilera-Méndez, Carlos Juárez-Toledo, Juan Roberto Calderón-Maya, Irma Martínez-Carrillo","doi":"10.35429/jsl.2022.26.9.1.8","DOIUrl":"https://doi.org/10.35429/jsl.2022.26.9.1.8","url":null,"abstract":"Storm surge is a phenomenon that occurs on coasts with a higher incidence in the rainy season. The factors that promote its appearance are the wind and the tide whose force has been sometimes catastrophic. The objective of the study is to provide a storm surge forecast using the SWASH numerical model for some points on the Mexican Pacific coast. The approach of the experiment refers to previous works that use the infrastructure and data available from NOAA and SEMAR; the use of unstructured meshes used in a wave model to conclude in a beach wave model. In the validation of the results, the tide gauges of the study locations will be used; with the feedback obtained, the necessary adjustments are expected until the model has at least 60% correct measurements. Some authors agree that global warming affects the power with which the phenomenon has been manifesting itself, so that the development of technology could help minimize the consequences.","PeriodicalId":192509,"journal":{"name":"Revista de Simulación y Laboratorio","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132374049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-30DOI: 10.35429/jsl.2022.27.9.1.13
A. Martínez-Ruíz, Juan Quintanar-Olguin, Miguel Servín-Palestina, F. R. Flores-de la Rosa
The HortSyst model is a new discrete-time model to describe the dynamics of photothermal time (PTT), dry matter production (DMP), N uptake (Nup), leaf area index (LAI) and rate of transpiration (ETc) of greenhouse crops, it has 13 parameters. The model assumes that crops do not have water and nutrient limitations. The input variables of the model are hourly measurements of air temperature, relative humidity, and the integral of solar radiation. Two experiments were carried out in a greenhouse, with hydroponic tomato cv. "CID F1" at a density of 3.5 plants m-2, autumn-winter and spring-summer cycle, in Chapingo, Mexico. The first experiment was transplanted on August 21, 2015 and the second experiment on April 24, 2016. A weather station was installed inside the greenhouses, temperature and relative humidity were measured with a model S-TMB-M006 sensor and radiation global sensor S-LIB-M003. The objective of this research is to compare two growth models for tomato in greenhouses. According to the adjustment of its predictions against the measurements it can be of help in the supply water and nitrogen.
{"title":"Comparison of Vegsyst and Hortsyt models: Two models of growth of greenhouse crops","authors":"A. Martínez-Ruíz, Juan Quintanar-Olguin, Miguel Servín-Palestina, F. R. Flores-de la Rosa","doi":"10.35429/jsl.2022.27.9.1.13","DOIUrl":"https://doi.org/10.35429/jsl.2022.27.9.1.13","url":null,"abstract":"The HortSyst model is a new discrete-time model to describe the dynamics of photothermal time (PTT), dry matter production (DMP), N uptake (Nup), leaf area index (LAI) and rate of transpiration (ETc) of greenhouse crops, it has 13 parameters. The model assumes that crops do not have water and nutrient limitations. The input variables of the model are hourly measurements of air temperature, relative humidity, and the integral of solar radiation. Two experiments were carried out in a greenhouse, with hydroponic tomato cv. \"CID F1\" at a density of 3.5 plants m-2, autumn-winter and spring-summer cycle, in Chapingo, Mexico. The first experiment was transplanted on August 21, 2015 and the second experiment on April 24, 2016. A weather station was installed inside the greenhouses, temperature and relative humidity were measured with a model S-TMB-M006 sensor and radiation global sensor S-LIB-M003. The objective of this research is to compare two growth models for tomato in greenhouses. According to the adjustment of its predictions against the measurements it can be of help in the supply water and nitrogen.","PeriodicalId":192509,"journal":{"name":"Revista de Simulación y Laboratorio","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122071450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-31DOI: 10.35429/jsl.2021.25.8.1.8
Juan Carlos Rojas-Garnica, J. L. Muñoz-Mata, Juan Pedro Cervantes-De la Rosa, Alma Delia Ocotitla-Muñoz
In medical applications, specifically in the handling of mechanical utensils, hygiene and safety must be ensured, which implies a complete cleaning and sterilization of these, as well as the absence of burrs on support edges, in order that there are no harmful cuts of the tissues that are being examinated or manipulated. In such a way, the so-called mirrors or vaginal dilators are very useful elements in the review of women's health and should not be exempt from the minimum quality of hygiene and safety. These devices, are developed using a special polymer, which are commonly elaborated through plastic injectors using molds, due to, they are implemented using different parts, generate the creation of sharp edges and shavings that must be eliminated. The geometry of the mirrors implies a certain complexity in the elimination of the cutting elements. In the present work the design of a polishing machine is presented, which is designed under the principle of fusion of sharp edges and shavings by applying heat from butane gas flames. The proposed machine transports the mirrors to the position to the location of the heating source, with the proper orientation, in order to eliminate the edges and shavings.
{"title":"Design of an equipment for polishing of medical vagin dilators in order to eliminate edges and burrs","authors":"Juan Carlos Rojas-Garnica, J. L. Muñoz-Mata, Juan Pedro Cervantes-De la Rosa, Alma Delia Ocotitla-Muñoz","doi":"10.35429/jsl.2021.25.8.1.8","DOIUrl":"https://doi.org/10.35429/jsl.2021.25.8.1.8","url":null,"abstract":"In medical applications, specifically in the handling of mechanical utensils, hygiene and safety must be ensured, which implies a complete cleaning and sterilization of these, as well as the absence of burrs on support edges, in order that there are no harmful cuts of the tissues that are being examinated or manipulated. In such a way, the so-called mirrors or vaginal dilators are very useful elements in the review of women's health and should not be exempt from the minimum quality of hygiene and safety. These devices, are developed using a special polymer, which are commonly elaborated through plastic injectors using molds, due to, they are implemented using different parts, generate the creation of sharp edges and shavings that must be eliminated. The geometry of the mirrors implies a certain complexity in the elimination of the cutting elements. In the present work the design of a polishing machine is presented, which is designed under the principle of fusion of sharp edges and shavings by applying heat from butane gas flames. The proposed machine transports the mirrors to the position to the location of the heating source, with the proper orientation, in order to eliminate the edges and shavings.","PeriodicalId":192509,"journal":{"name":"Revista de Simulación y Laboratorio","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130359621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-31DOI: 10.35429/jsl.2021.25.8.9.15
Marisol Basilio-Mora, Julio César Hernández-Salgado, Diana Juárez-Barrios
The demand for chiltepín is increasing, since in addition to the traditional sale of fresh and dried fruit in the street and regional markets, there is also the commercialization of derived products such as pickles, sauces and dehydrated products in chain stores, the market is supplied by the collection of wild fruits. This has made harvesting intense and aggressive, because collectors cut productive branches or the entire plant in order to harvest a larger quantity, limiting its possibilities for regeneration. Therefore, it is proposed to improve the germination of chiltepín seeds and to evaluate the obtaining of good quality seedlings through substrate mixtures and application of gibberellic acid (AG3) at 400 parts per million (ppm). The results of the research indicate that at seven days treatments 4, 3, 7 and 8 differ significantly from the other treatments, while by day 31 treatments 1, 7 and 8 are significantly different from the others, with a significance of 95%; for the number of roots the best treatment was T1 for the evaluation on day 31 after planting (dds).
{"title":"Germination of chiltepín with mixed substrates and application of gibberellic acid","authors":"Marisol Basilio-Mora, Julio César Hernández-Salgado, Diana Juárez-Barrios","doi":"10.35429/jsl.2021.25.8.9.15","DOIUrl":"https://doi.org/10.35429/jsl.2021.25.8.9.15","url":null,"abstract":"The demand for chiltepín is increasing, since in addition to the traditional sale of fresh and dried fruit in the street and regional markets, there is also the commercialization of derived products such as pickles, sauces and dehydrated products in chain stores, the market is supplied by the collection of wild fruits. This has made harvesting intense and aggressive, because collectors cut productive branches or the entire plant in order to harvest a larger quantity, limiting its possibilities for regeneration. Therefore, it is proposed to improve the germination of chiltepín seeds and to evaluate the obtaining of good quality seedlings through substrate mixtures and application of gibberellic acid (AG3) at 400 parts per million (ppm). The results of the research indicate that at seven days treatments 4, 3, 7 and 8 differ significantly from the other treatments, while by day 31 treatments 1, 7 and 8 are significantly different from the others, with a significance of 95%; for the number of roots the best treatment was T1 for the evaluation on day 31 after planting (dds).","PeriodicalId":192509,"journal":{"name":"Revista de Simulación y Laboratorio","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115732987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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