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Full-Text Articles in Engineering
Classifying Reflectance Targets Under Ambient Light Conditions Using Passive Spectral Measurements, Ali Hamidisepehr, Michael P. Sama, Joseph S. Dvorak, Ole O. Wendroth, Michael D. Montross
Classifying Reflectance Targets Under Ambient Light Conditions Using Passive Spectral Measurements, Ali Hamidisepehr, Michael P. Sama, Joseph S. Dvorak, Ole O. Wendroth, Michael D. Montross
Biosystems and Agricultural Engineering Faculty Publications
Collecting remotely sensed spectral data under varying ambient light conditions is challenging. The objective of this study was to test the ability to classify grayscale targets observed by portable spectrometers under varying ambient light conditions. Two sets of spectrometers covering ultraviolet (UV), visible (VIS), and near−infrared (NIR) wavelengths were instrumented using an embedded computer. One set was uncalibrated and used to measure the raw intensity of light reflected from a target. The other set was calibrated and used to measure downwelling irradiance. Three ambient−light compensation methods that successively built upon each other were investigated. The default method used a variable …
Characterization And Enzyme Engineering Of A Hyperthermophilic Laccase Toward Improving Its Activity In Ionic Liquid, Joseph Craig Stevens, David W. Rodgers, Claire Dumon, Jian Shi
Characterization And Enzyme Engineering Of A Hyperthermophilic Laccase Toward Improving Its Activity In Ionic Liquid, Joseph Craig Stevens, David W. Rodgers, Claire Dumon, Jian Shi
Biosystems and Agricultural Engineering Faculty Publications
Ionic liquids (ILs) are organic salts molten at room temperature that can be used for a wide variety of applications. Many ILs, such as 1-ethyl-3-methylimidazolium acetate ([C2C1Im][OAc]), have been shown to remove a significant fraction of the complex biopolymer lignin from biomass during pretreatment. Valorizing lignin via biological pathways (e.g., enzymes) holds promise but is limited by the low biocompatibility of many ILs used for pretreatment. The discovery of thermostable enzymes and the application of enzyme engineering techniques have yielded biocatalysts capable of withstanding high concentrations of ILs. Converting lignin from a waste product to value-added …
Non-Destructive Technologies For Detecting Insect Infestation In Fruits And Vegetables Under Postharvest Conditions: A Critical Review, Akinbode A. Adedeji, Nader Ekramirad, Ahmed Rady, Ali Hamidisepehr, Kevin D. Donohue, Raul T. Villanueva, Chadwick A. Parrish, Mengxing Li
Non-Destructive Technologies For Detecting Insect Infestation In Fruits And Vegetables Under Postharvest Conditions: A Critical Review, Akinbode A. Adedeji, Nader Ekramirad, Ahmed Rady, Ali Hamidisepehr, Kevin D. Donohue, Raul T. Villanueva, Chadwick A. Parrish, Mengxing Li
Biosystems and Agricultural Engineering Faculty Publications
In the last two decades, food scientists have attempted to develop new technologies that can improve the detection of insect infestation in fruits and vegetables under postharvest conditions using a multitude of non-destructive technologies. While consumers' expectations for higher nutritive and sensorial value of fresh produce has increased over time, they have also become more critical on using insecticides or synthetic chemicals to preserve food quality from insects' attacks or enhance the quality attributes of minimally processed fresh produce. In addition, the increasingly stringent quarantine measures by regulatory agencies for commercial import-export of fresh produce needs more reliable technologies for …