2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT)最新文献_第2页

Alkaline Extraction and Purification of Huauzontle (Chenopodium berlandieri subsp. Nuttalliae) Seed Proteins by Ultrafiltration Membranes 花柔子碱的提取纯化。Nuttalliae)种子蛋白的超滤膜研究

2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT) Pub Date : 2019-11-01 DOI: 10.1109/iCASAT48251.2019.9069519

Cristian Ricardo Hernández-Marín, P. C. Guadarrama-Mendoza, R. Valadez-Blanco, B. Chen, L. Diosady

{"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}

引用次数: 1

Extending the Measurement Error Model of a Direct Visual Odometry Algorithm to Improve its Accuracy for Planetary Rover Navigation 扩展一种直接视觉测程算法的测量误差模型以提高其在行星漫游车导航中的精度

2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT) Pub Date : 2019-11-01 DOI: 10.1109/iCASAT48251.2019.9069525

G. Martinez

引用次数: 0

Authenticity analysis of orange (Citrus sinensis) essential oils 柑桔精油的真伪分析

2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT) Pub Date : 2019-11-01 DOI: 10.1109/iCASAT48251.2019.9069529

Araceli González, P. A. Vázquez Landaverde, Miriam G. Rodríguez Olvera

{"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}

引用次数: 0

Comprehensive review on high-frequency CNT-based interconnects 基于碳纳米管的高频互连研究综述

2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT) Pub Date : 2019-11-01 DOI: 10.1109/iCASAT48251.2019.9069515

A. Pacheco-Sánchez, Irving Larruz-Castillo, D. Sangani, D. Valdez-Pérez

引用次数: 1

Stochastic contingency assessment applied to Demand Management Contracts 随机应急评估在需求管理合同中的应用

2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT) Pub Date : 2019-11-01 DOI: 10.1109/iCASAT48251.2019.9069521

N. Gonzalez-Cabrera

引用次数: 0

Low Temperature Plasma by Corona discharge in water: lethal effect on Escherichia coli and Salmonella enterica serotype Typhimurium 水中电晕放电低温等离子体对大肠杆菌和肠炎沙门氏菌血清型鼠伤寒杆菌的致死作用

2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT) Pub Date : 2019-11-01 DOI: 10.1109/iCASAT48251.2019.9069516

D. G. Gutiérrez-León, Tomás Serrano-Ramírez

{"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}

引用次数: 0

Face recognition in office environments with Google AIY Vision Kit 人脸识别在办公环境与谷歌AIY视觉工具包

2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT) Pub Date : 2019-11-01 DOI: 10.1109/iCASAT48251.2019.9069514

Angel Hernández, Francisco Ornelas, Juan Hurtado, Joel González

引用次数: 1

[Copyright notice] (版权)

2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT) Pub Date : 2019-11-01 DOI: 10.1109/icasat48251.2019.9069535

引用次数: 0

Antimicrobial effect of silver nanoparticles synthesized by Paecilomyces variotii 不同拟青霉合成纳米银的抗菌作用

2019 IEEE International Conference on Applied Science and Advanced Technology (iCASAT) Pub Date : 2019-11-01 DOI: 10.1109/iCASAT48251.2019.9069536

Calvo Olvera Diana Alexandra, Rojas Avelizapa Norma Gabriela

引用次数: 1