Pub Date : 2019-11-01DOI: 10.1109/iCASAT48251.2019.9069519
Cristian Ricardo Hernández-Marín, P. C. Guadarrama-Mendoza, R. Valadez-Blanco, B. Chen, L. Diosady
Huauzontle (Chenopodium berlandieri subsp. Nuttalliae) is a species native to Mexico. Over the centuries, important nutritional and medical properties have been attributed to this species in ancient Mexican tradition. In contrast, quinoa (Chenopodium quinoaWilld.), an Andean crop genetically related to huauzontle, has been widely studied and acknowledged for its outstanding potential as a high quality protein source. Considering this, the main objective of this study was to obtain and purify the protein fractions of huauzontle seeds using alkaline extraction, isoelectric precipitation, and ultrafiltration membrane technology. Different pH settings were tested for the extraction and precipitation operations and pH 11 and 3.5 were selected, respectively. The protein mass balance for both extraction and precipitation, accounted for 96.6% and 98.7% of the proteins respectively. Using a 10 kDa ultrafiltration membrane, the protein was concentrated and purified by ultrafiltration and diafiltration at 45-50 °C with a concentration factor of 4 and a diafiltration volume of 4. A precipitated protein isolate was obtained with 78.96% purity. In this study, a process that combines alkaline extraction, isoelectric precipitation and ultrafiltration membrane technology was successfully employed to separate and purify huauzontle protein fractions to a level comparable to those reported in the literature for other proteinaceous seeds. In addition, this work will help to establish huauzontle, an ancient native Mexican crop, as an important source of protein, which can also be used as a protein supplement for staple foods.
{"title":"Alkaline Extraction and Purification of Huauzontle (Chenopodium berlandieri subsp. Nuttalliae) Seed Proteins by Ultrafiltration Membranes","authors":"Cristian Ricardo Hernández-Marín, P. C. Guadarrama-Mendoza, R. Valadez-Blanco, B. Chen, L. Diosady","doi":"10.1109/iCASAT48251.2019.9069519","DOIUrl":"https://doi.org/10.1109/iCASAT48251.2019.9069519","url":null,"abstract":"Huauzontle (Chenopodium berlandieri subsp. Nuttalliae) is a species native to Mexico. Over the centuries, important nutritional and medical properties have been attributed to this species in ancient Mexican tradition. In contrast, quinoa (Chenopodium quinoaWilld.), an Andean crop genetically related to huauzontle, has been widely studied and acknowledged for its outstanding potential as a high quality protein source. Considering this, the main objective of this study was to obtain and purify the protein fractions of huauzontle seeds using alkaline extraction, isoelectric precipitation, and ultrafiltration membrane technology. Different pH settings were tested for the extraction and precipitation operations and pH 11 and 3.5 were selected, respectively. The protein mass balance for both extraction and precipitation, accounted for 96.6% and 98.7% of the proteins respectively. Using a 10 kDa ultrafiltration membrane, the protein was concentrated and purified by ultrafiltration and diafiltration at 45-50 °C with a concentration factor of 4 and a diafiltration volume of 4. A precipitated protein isolate was obtained with 78.96% purity. In this study, a process that combines alkaline extraction, isoelectric precipitation and ultrafiltration membrane technology was successfully employed to separate and purify huauzontle protein fractions to a level comparable to those reported in the literature for other proteinaceous seeds. In addition, this work will help to establish huauzontle, an ancient native Mexican crop, as an important source of protein, which can also be used as a protein supplement for staple foods.","PeriodicalId":178628,"journal":{"name":"2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114932332","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 : 2019-11-01DOI: 10.1109/iCASAT48251.2019.9069525
G. Martinez
In this paper, the accuracy of a direct monocular visual odometry algorithm is improved. The algorithm is able to determine the position and orientation of a robot directly from intensity differences measured at observation points between consecutive images, captured by a monocular camera, rigidly attached to one side of its structure, tilted downwards. The improvement was achieved by extending the stochastic model of the intensity-difference measurement error, from considering only the camera noise, to one that also considers the intensity-difference measurement error due to the 3D shape error between the assumed and the true planetary surface shape. The corresponding covariance matrix was incorporated into a Maximum Likelihood estimator. According to the experimental results on irregular surfaces, where the 3D shape error is usually large, the accuracy of the visual odometry algorithm improved by a factor of 2 but with the cost of increasing the processing time also by the same factor.
{"title":"Extending the Measurement Error Model of a Direct Visual Odometry Algorithm to Improve its Accuracy for Planetary Rover Navigation","authors":"G. Martinez","doi":"10.1109/iCASAT48251.2019.9069525","DOIUrl":"https://doi.org/10.1109/iCASAT48251.2019.9069525","url":null,"abstract":"In this paper, the accuracy of a direct monocular visual odometry algorithm is improved. The algorithm is able to determine the position and orientation of a robot directly from intensity differences measured at observation points between consecutive images, captured by a monocular camera, rigidly attached to one side of its structure, tilted downwards. The improvement was achieved by extending the stochastic model of the intensity-difference measurement error, from considering only the camera noise, to one that also considers the intensity-difference measurement error due to the 3D shape error between the assumed and the true planetary surface shape. The corresponding covariance matrix was incorporated into a Maximum Likelihood estimator. According to the experimental results on irregular surfaces, where the 3D shape error is usually large, the accuracy of the visual odometry algorithm improved by a factor of 2 but with the cost of increasing the processing time also by the same factor.","PeriodicalId":178628,"journal":{"name":"2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133430989","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 : 2019-11-01DOI: 10.1109/iCASAT48251.2019.9069529
Araceli González, P. A. Vázquez Landaverde, Miriam G. Rodríguez Olvera
Orange essential oils have a lot of applications in industrial fields such as pharmaceuticals, cosmetics, and high demand for food and fragrances. Adulteration in essential oils is common, and this replaces the high-cost ingredients with cheaper and lower quality substitutes, which can be attractive and lucrative, and it has implications for the health of consumers like skin infections reported in previous studies. Therefore, it is necessary to have an analytical methodology with highly selective and sensitive to authenticate and quantify natural essential oils and their level of adulteration. The nonvolatile fraction of orange essential oils is commonly undervalued due to their insignificant contribution to the smell profile. However, these compounds may be the key to develop an analytical approach, but there is not enough information reported regarding authentication techniques for the flavor and fragrances industry. The purpose of this project is to develop a methodology that allows authenticating orange essential oils by chromatographic techniques. It is proposed a Reversed-Phase High-performance Liquid Chromatography (RP-HPLC) method for the compositional identification of polymethoxyflavones (PMFs) in orange essential oils. Twenty-eight samples of orange essential oils accomplished this study subjecting a solid-phase extraction (SPE) cartridges (C18). Then samples were filtered through the nylon membrane of 0.45 µm pore size, later were subjected to RP-HPLC analysis conditions, and for the identification of these compounds was carried out on Acquity UPLC H class with QDa mass detector (along with PDA). The compounds PMFs found were sinensetin, hexamethoxyflavone, nobiletin, tetra-o-methyl-scutellarein, heptamethoxyflavone, and tangeretin. A statistic tool with a high level of confidence allows identifying adulteration in orange essential oils.
{"title":"Authenticity analysis of orange (Citrus sinensis) essential oils","authors":"Araceli González, P. A. Vázquez Landaverde, Miriam G. Rodríguez Olvera","doi":"10.1109/iCASAT48251.2019.9069529","DOIUrl":"https://doi.org/10.1109/iCASAT48251.2019.9069529","url":null,"abstract":"Orange essential oils have a lot of applications in industrial fields such as pharmaceuticals, cosmetics, and high demand for food and fragrances. Adulteration in essential oils is common, and this replaces the high-cost ingredients with cheaper and lower quality substitutes, which can be attractive and lucrative, and it has implications for the health of consumers like skin infections reported in previous studies. Therefore, it is necessary to have an analytical methodology with highly selective and sensitive to authenticate and quantify natural essential oils and their level of adulteration. The nonvolatile fraction of orange essential oils is commonly undervalued due to their insignificant contribution to the smell profile. However, these compounds may be the key to develop an analytical approach, but there is not enough information reported regarding authentication techniques for the flavor and fragrances industry. The purpose of this project is to develop a methodology that allows authenticating orange essential oils by chromatographic techniques. It is proposed a Reversed-Phase High-performance Liquid Chromatography (RP-HPLC) method for the compositional identification of polymethoxyflavones (PMFs) in orange essential oils. Twenty-eight samples of orange essential oils accomplished this study subjecting a solid-phase extraction (SPE) cartridges (C18). Then samples were filtered through the nylon membrane of 0.45 µm pore size, later were subjected to RP-HPLC analysis conditions, and for the identification of these compounds was carried out on Acquity UPLC H class with QDa mass detector (along with PDA). The compounds PMFs found were sinensetin, hexamethoxyflavone, nobiletin, tetra-o-methyl-scutellarein, heptamethoxyflavone, and tangeretin. A statistic tool with a high level of confidence allows identifying adulteration in orange essential oils.","PeriodicalId":178628,"journal":{"name":"2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114873832","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 : 2019-11-01DOI: 10.1109/iCASAT48251.2019.9069515
A. Pacheco-Sánchez, Irving Larruz-Castillo, D. Sangani, D. Valdez-Pérez
This review focuses on the recent advances of metallic carbon nanotubes (m-CNTs) towards their implementation as interconnects in high-frequency (HF) applications. S-parameters of fabricated passive devices using m-CNTs are summarized and discussed as well as the device characteristics. In addition, compact and analytical models of CNT-based interconnects are reviewed in detail and model improvements are proposed.
{"title":"Comprehensive review on high-frequency CNT-based interconnects","authors":"A. Pacheco-Sánchez, Irving Larruz-Castillo, D. Sangani, D. Valdez-Pérez","doi":"10.1109/iCASAT48251.2019.9069515","DOIUrl":"https://doi.org/10.1109/iCASAT48251.2019.9069515","url":null,"abstract":"This review focuses on the recent advances of metallic carbon nanotubes (m-CNTs) towards their implementation as interconnects in high-frequency (HF) applications. S-parameters of fabricated passive devices using m-CNTs are summarized and discussed as well as the device characteristics. In addition, compact and analytical models of CNT-based interconnects are reviewed in detail and model improvements are proposed.","PeriodicalId":178628,"journal":{"name":"2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT)","volume":"156 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122317470","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 : 2019-11-01DOI: 10.1109/iCASAT48251.2019.9069521
N. Gonzalez-Cabrera
Electric systems require the necessity of new methods and techniques to assess the security in operation and planning. These techniques must be capable to add the oil variation prices, demand growing and reliability assessment. The consideration of all these variables convert the problem in a large numbers of elements to be evaluated in the operation problem. As a result, this arrogates great times wasted on unnecessary simulation time. Mainly from the point of view of contingency assessment. This paper presents an alternative method for the contingencies assessment considering stochastic contingency selection. Applied in the operation of power system considering the minimum load reduction. This allow offer programs utilizing structured incentive payments to encourage customer enrollment and energy conservation.
{"title":"Stochastic contingency assessment applied to Demand Management Contracts","authors":"N. Gonzalez-Cabrera","doi":"10.1109/iCASAT48251.2019.9069521","DOIUrl":"https://doi.org/10.1109/iCASAT48251.2019.9069521","url":null,"abstract":"Electric systems require the necessity of new methods and techniques to assess the security in operation and planning. These techniques must be capable to add the oil variation prices, demand growing and reliability assessment. The consideration of all these variables convert the problem in a large numbers of elements to be evaluated in the operation problem. As a result, this arrogates great times wasted on unnecessary simulation time. Mainly from the point of view of contingency assessment. This paper presents an alternative method for the contingencies assessment considering stochastic contingency selection. Applied in the operation of power system considering the minimum load reduction. This allow offer programs utilizing structured incentive payments to encourage customer enrollment and energy conservation.","PeriodicalId":178628,"journal":{"name":"2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114669557","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 : 2019-11-01DOI: 10.1109/iCASAT48251.2019.9069516
D. G. Gutiérrez-León, Tomás Serrano-Ramírez
In this research work, inactivation of two significant global contributors to microbiological problems in water was carried out: Escherichia coli and Salmonella enterica serotype Typhimurium. Both are representative of fecal pollution and their presence could compromise water quality and food safety generating serious effects on human health.Simultaneous inactivation process of Escherichia coli and Salmonella enterica serotype Typhimurium involved the production of Low Temperature Plasma from Positive Corona discharge (20 kV, 0.45 mA) at atmospheric conditions. Initial bacteria concentrations in water were respectively, 3.4 log CFU/ml and 3.6 log CFU/ml, which are typical from poultry activities.High effectiveness (> 99%) in the process was obtained at the end of 180 s and, total inactivation of Escherichia coli and Salmonella enterica serotype Typhimurium was achieved at 360 s. During treatment, Escherichia coli bacteria showed major resistance to be reduced; nevertheless, synergistic lethal effects generated in water during the production of plasma: reactive chemical species, shock waves and UV radiation, allowed to get null bacteria survival.
{"title":"Low Temperature Plasma by Corona discharge in water: lethal effect on Escherichia coli and Salmonella enterica serotype Typhimurium","authors":"D. G. Gutiérrez-León, Tomás Serrano-Ramírez","doi":"10.1109/iCASAT48251.2019.9069516","DOIUrl":"https://doi.org/10.1109/iCASAT48251.2019.9069516","url":null,"abstract":"In this research work, inactivation of two significant global contributors to microbiological problems in water was carried out: Escherichia coli and Salmonella enterica serotype Typhimurium. Both are representative of fecal pollution and their presence could compromise water quality and food safety generating serious effects on human health.Simultaneous inactivation process of Escherichia coli and Salmonella enterica serotype Typhimurium involved the production of Low Temperature Plasma from Positive Corona discharge (20 kV, 0.45 mA) at atmospheric conditions. Initial bacteria concentrations in water were respectively, 3.4 log CFU/ml and 3.6 log CFU/ml, which are typical from poultry activities.High effectiveness (> 99%) in the process was obtained at the end of 180 s and, total inactivation of Escherichia coli and Salmonella enterica serotype Typhimurium was achieved at 360 s. During treatment, Escherichia coli bacteria showed major resistance to be reduced; nevertheless, synergistic lethal effects generated in water during the production of plasma: reactive chemical species, shock waves and UV radiation, allowed to get null bacteria survival.","PeriodicalId":178628,"journal":{"name":"2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130661716","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 : 2019-11-01DOI: 10.1109/iCASAT48251.2019.9069514
Angel Hernández, Francisco Ornelas, Juan Hurtado, Joel González
The following document shows the design, development, and implementation of a computer vision system for face detection through convolutional neural networks. This system was first developed on a PC and then implemented in an embedded system such as the Google AIY Vision Kit; This kit is a powerful tool for working with machine and deep learning, as well as having an affordable cost. The main application of this system is for the surveillance of places with restricted access, such as laboratories, warehouses, offices. The methodology for the development of this system was: design the network, obtain a database for training, train the network, and test the performance of the system.
{"title":"Face recognition in office environments with Google AIY Vision Kit","authors":"Angel Hernández, Francisco Ornelas, Juan Hurtado, Joel González","doi":"10.1109/iCASAT48251.2019.9069514","DOIUrl":"https://doi.org/10.1109/iCASAT48251.2019.9069514","url":null,"abstract":"The following document shows the design, development, and implementation of a computer vision system for face detection through convolutional neural networks. This system was first developed on a PC and then implemented in an embedded system such as the Google AIY Vision Kit; This kit is a powerful tool for working with machine and deep learning, as well as having an affordable cost. The main application of this system is for the surveillance of places with restricted access, such as laboratories, warehouses, offices. The methodology for the development of this system was: design the network, obtain a database for training, train the network, and test the performance of the system.","PeriodicalId":178628,"journal":{"name":"2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125279568","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 : 2019-11-01DOI: 10.1109/icasat48251.2019.9069535
{"title":"[Copyright notice]","authors":"","doi":"10.1109/icasat48251.2019.9069535","DOIUrl":"https://doi.org/10.1109/icasat48251.2019.9069535","url":null,"abstract":"","PeriodicalId":178628,"journal":{"name":"2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129137914","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}
Currently, the resistance of bacterial strains to antibiotics is a public health concern, causing economic losses, mortality and morbidity. This has generated the need to develop effective methods and products to eliminate resistant microbial cultures, such as the silver nanoparticles (AgNPs), whose microbicide effect has been well documented in both Gram-negative and Gram-positive bacteria. In this study, we synthesize spherical AgNPs of 10 nm diameter using the extracellular filtrate of the fungus Paecilomyces variotii, also the cytotoxic capacity of the AgNPs was evaluated in pathogenic bacteria of importance in the health sector. Silver nanoparticles showed significant antimicrobial activities for Gram-negative (S. typhi, P. vulgaris, E. coli, P. aeruginosa) and Gram-positive (B. subtilis, B. megaterium, S. aureus, S, typhi) bacteria. The effect was greater as the concentration increased.
{"title":"Antimicrobial effect of silver nanoparticles synthesized by Paecilomyces variotii","authors":"Calvo Olvera Diana Alexandra, Rojas Avelizapa Norma Gabriela","doi":"10.1109/iCASAT48251.2019.9069536","DOIUrl":"https://doi.org/10.1109/iCASAT48251.2019.9069536","url":null,"abstract":"Currently, the resistance of bacterial strains to antibiotics is a public health concern, causing economic losses, mortality and morbidity. This has generated the need to develop effective methods and products to eliminate resistant microbial cultures, such as the silver nanoparticles (AgNPs), whose microbicide effect has been well documented in both Gram-negative and Gram-positive bacteria. In this study, we synthesize spherical AgNPs of 10 nm diameter using the extracellular filtrate of the fungus Paecilomyces variotii, also the cytotoxic capacity of the AgNPs was evaluated in pathogenic bacteria of importance in the health sector. Silver nanoparticles showed significant antimicrobial activities for Gram-negative (S. typhi, P. vulgaris, E. coli, P. aeruginosa) and Gram-positive (B. subtilis, B. megaterium, S. aureus, S, typhi) bacteria. The effect was greater as the concentration increased.","PeriodicalId":178628,"journal":{"name":"2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116067667","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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