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Villanueva M, Vega-Chacón J, Picasso G. Comparative analysis of a bulk optode based on a valinomycin ionophore and a nano-optode in micelles with pluronic F-127 for the quantification of potassium in aqueous solutions. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:4710-4723. [PMID: 38948955 DOI: 10.1039/d4ay00581c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
In this work, two types of optical sensors were prepared for the quantification of potassium: the bulk optode (BO) and nano-optode (NO). The BO was prepared using three main components: the ionophore valinomycin, the ion exchanger tetrakis(4-chlorophenyl) potassium borate (K-TCPB), and the chromoionophore ETH 5294 (CHI). The optimal composition was found to be in a ratio of [1 : 1 : 1]. The NO was prepared by miniaturizing the BO through sonication in surfactant Pluronic F-127. The working range for the linear calibration model of BO was from 10-6 to 1.0 M K+ with a LODBO = 0.31 μM, meanwhile for NO was from 10-4 to 1.0 M K+ with a LODNO = 30.3 μM. Both optodes were tested for selectivity towards K+ in the presence of alkaline and alkaline earth ions, with a selectivity coefficient > 1.0. Furthermore, precision and stability studies of BO and NO were performed for three levels of K+ concentrations, 10-6, 10-3, 1.0 M for BO and 10-4, 10-2, 1.0 M for NO, showing a good homogeneity of the NO in the whole concentration range. However, an excessive variability was obtained for BO at 1.0 M K+. Therefore, the NO represents a potential tool for quantification of K+.
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Affiliation(s)
- Miguel Villanueva
- Technology of Materials for Environmental Remediation (TecMARA) Research Group, Faculty of Sciences, National University of Engineering, Av. Tupac Amaru 210, Lima 15333, Peru.
| | - Jaime Vega-Chacón
- Technology of Materials for Environmental Remediation (TecMARA) Research Group, Faculty of Sciences, National University of Engineering, Av. Tupac Amaru 210, Lima 15333, Peru.
| | - Gino Picasso
- Technology of Materials for Environmental Remediation (TecMARA) Research Group, Faculty of Sciences, National University of Engineering, Av. Tupac Amaru 210, Lima 15333, Peru.
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Stevens JD, Murray D, Diepeveen D, Toohey D. A low-cost spectroscopic nutrient management system for Microscale Smart Hydroponic system. PLoS One 2024; 19:e0302638. [PMID: 38718016 PMCID: PMC11078404 DOI: 10.1371/journal.pone.0302638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 04/09/2024] [Indexed: 05/12/2024] Open
Abstract
Hydroponics offers a promising approach to help alleviate pressure on food security for urban residents. It requires minimal space and uses less resources, but management can be complex. Microscale Smart Hydroponics (MSH) systems leverage IoT systems to simplify hydroponics management for home users. Previous work in nutrient management has produced systems that use expensive sensing methods or utilized lower cost methods at the expense of accuracy. This study presents a novel inexpensive nutrient management system for MSH applications that utilises a novel waterproofed, IoT spectroscopy sensor (AS7265x) in a transflective application. The sensor is submerged in a hydroponic solution to monitor the nutrients and MSH system predicts the of nutrients in the hydroponic solution and recommends an adjustment quantity in mL. A three-phase model building process was carried out resulting in significant MLR models for predicting the mL, with an R2 of 0.997. An experiment evaluated the system's performance using the trained models with a 30-day grow of lettuce in a real-world setting, comparing the results of the management system to a control group. The sensor system successfully adjusted and maintained nutrient levels, resulting in plant growth that outperformed the control group. The results of the models in actual deployment showed a strong, significant correlation of 0.77 with the traditional method of measuring the electrical conductivity of nutrients. This novel nutrient management system has the potential to transform the way nutrients are monitored in hydroponics. By simplifying nutrient management, this system can encourage the adoption of hydroponics, contributing to food security and environmental sustainability.
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Affiliation(s)
- Joseph D. Stevens
- School of Information Technology, Murdoch University, Murdoch, Western Australia, Australia
| | - David Murray
- School of Information Technology, Murdoch University, Murdoch, Western Australia, Australia
| | - Dean Diepeveen
- School of Agricultural Sciences, Murdoch University, Murdoch, Western Australia, Australia
- Department of Primary Industries and Regional Development, South Perth, Western Australia, Australia
| | - Danny Toohey
- School of Management and Marketing, Curtin University, Perth, Western Australia, Australia
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Frossard E, Crain G, Giménez de Azcárate Bordóns I, Hirschvogel C, Oberson A, Paille C, Pellegri G, Udert KM. Recycling nutrients from organic waste for growing higher plants in the Micro Ecological Life Support System Alternative (MELiSSA) loop during long-term space missions. LIFE SCIENCES IN SPACE RESEARCH 2024; 40:176-185. [PMID: 38245343 DOI: 10.1016/j.lssr.2023.08.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 08/22/2023] [Accepted: 08/23/2023] [Indexed: 01/22/2024]
Abstract
Space agencies are developing Bioregenerative Life Support Systems (BLSS) in view of upcoming long-term crewed space missions. Most of these BLSS plan to include various crops to produce different types of foods, clean water, and O2 while capturing CO2 from the atmosphere. However, growing these plants will require the appropriate addition of nutrients in forms that are available. As shipping fertilizers from Earth would be too costly, it will be necessary to use waste-derived nutrients. Using the example of the MELiSSA (Micro-Ecological Life Support System Alternative) loop of the European Space Agency, this paper reviews what should be considered so that nutrients recycled from waste streams could be used by plants grown in a hydroponic system. Whereas substantial research has been conducted on nitrogen and phosphorus recovery from human urine, much work remains to be done on recovering nutrients from other liquid and solid organic waste. It is essential to continue to study ways to efficiently remove sodium and chloride from urine and other organic waste to prevent the spread of these elements to the rest of the MELiSSA loop. A full nitrogen balance at habitat level will have to be achieved; on one hand, sufficient N2 will be needed to maintain atmospheric pressure at a proper level and on the other, enough mineral nitrogen will have to be provided to the plants to ensure biomass production. From a plant nutrition point of view, we will need to evaluate whether the flux of nutrients reaching the hydroponic system will enable the production of nutrient solutions able to sustain a wide variety of crops. We will also have to assess the nutrient use efficiency of these crops and how that efficiency might be increased. Techniques and sensors will have to be developed to grow the plants, considering low levels or the total absence of gravity, the limited volume available to plant growth systems, variations in plant needs, the recycling of nutrient solutions, and eventually the ultimate disposal of waste that can no longer be used.
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Affiliation(s)
- Emmanuel Frossard
- ETH Zurich, Institute of Agricultural Sciences, 8315, Lindau, Switzerland.
| | - Grace Crain
- ETH Zurich, Institute of Agricultural Sciences, 8315, Lindau, Switzerland
| | | | | | - Astrid Oberson
- ETH Zurich, Institute of Agricultural Sciences, 8315, Lindau, Switzerland
| | | | - Geremia Pellegri
- ETH Zurich, Institute of Agricultural Sciences, 8315, Lindau, Switzerland
| | - Kai M Udert
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600, Dubendorf, Switzerland; ETH Zurich, Institute of Environmental Engineering, 8093, Zurich, Switzerland
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Carter JB, Huffaker R, Singh A, Bean E. HUM: A review of hydrochemical analysis using ultraviolet-visible absorption spectroscopy and machine learning. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 901:165826. [PMID: 37524192 DOI: 10.1016/j.scitotenv.2023.165826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 07/23/2023] [Accepted: 07/25/2023] [Indexed: 08/02/2023]
Abstract
There is a need to develop improved methods for water quality analysis. Traditionally, water quality analysis is performed in a laboratory on discrete samples or in the field with simple sensors, but these methods have inherent limitations. Ultraviolet-visible absorption spectroscopy (UVAS) is a commonly used laboratory technique for water quality analysis and is being applied more broadly in combination with machine learning (ML) to allow for the detection of multiple analytes without sample pretreatments. This methodology (referred to here as Hydrochemical analysis using Ultraviolet-visible absorption spectroscopy and Machine learning; 'HUM') can be applied in the laboratory or in situ while requiring less time, labor, and materials compared to traditional laboratory analysis. HUM has been used for the quantification of a variety of chemicals in a variety of settings, but information is lacking related to instrumental setup, sample requirements, and data analysis procedures. For instance, there is a need to investigate the influence of spectral parameters (e.g., sensitivity, signal-to-noise ratio, and spectral resolution) on measurement error. There is also a lack of research aimed at developing ML algorithms specifically for HUM. Finally, there are emerging concepts such as sensor fusion and model-sensor fusion which have been applied to similar fields but are not common in studies involving HUM. This review suggests the need for further studies to better understand the factors that influence HUM measurement accuracy along with the need for hardware and software developments so that the methodology can ultimately become more robust and standardized. This, in turn, could increase its adoption in both academic and non-academic settings. Once the HUM methodology has matured, it could help to reduce the environmental impacts of society by improving our understanding and management of environmental systems through high-frequency data collection and automated control of water quality in environmentally relevant systems.
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Affiliation(s)
- J Barrett Carter
- Department of Agricultural and Biological Engineering, University of Florida, 1741 Museum Road, Gainesville, FL 32611-0570, United States of America.
| | - Ray Huffaker
- Department of Agricultural and Biological Engineering, University of Florida, 1741 Museum Road, Gainesville, FL 32611-0570, United States of America
| | - Aditya Singh
- Department of Agricultural and Biological Engineering, University of Florida, 1741 Museum Road, Gainesville, FL 32611-0570, United States of America
| | - Eban Bean
- Department of Agricultural and Biological Engineering, University of Florida, 1741 Museum Road, Gainesville, FL 32611-0570, United States of America
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Guliy OI, Karavaeva OA, Smirnov AV, Eremin SA, Bunin VD. Optical Sensors for Bacterial Detection. SENSORS (BASEL, SWITZERLAND) 2023; 23:9391. [PMID: 38067765 PMCID: PMC10708710 DOI: 10.3390/s23239391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 11/12/2023] [Accepted: 11/20/2023] [Indexed: 12/18/2023]
Abstract
Analytical devices for bacterial detection are an integral part of modern laboratory medicine, as they permit the early diagnosis of diseases and their timely treatment. Therefore, special attention is directed to the development of and improvements in monitoring and diagnostic methods, including biosensor-based ones. A promising direction in the development of bacterial detection methods is optical sensor systems based on colorimetric and fluorescence techniques, the surface plasmon resonance, and the measurement of orientational effects. This review shows the detecting capabilities of these systems and the promise of electro-optical analysis for bacterial detection. It also discusses the advantages and disadvantages of optical sensor systems and the prospects for their further improvement.
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Affiliation(s)
- Olga I. Guliy
- Institute of Biochemistry and Physiology of Plants and Microorganisms—Subdivision of the Federal State Budgetary Research Institution Saratov Federal Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), Saratov 410049, Russia;
| | - Olga A. Karavaeva
- Institute of Biochemistry and Physiology of Plants and Microorganisms—Subdivision of the Federal State Budgetary Research Institution Saratov Federal Scientific Centre of the Russian Academy of Sciences (IBPPM RAS), Saratov 410049, Russia;
| | - Andrey V. Smirnov
- Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow 125009, Russia;
| | - Sergei A. Eremin
- Department of Chemistry, M. V. Lomonosov Moscow State University, Moscow 119991, Russia;
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Paper-based cation-selective optode sensor containing benzothiazole calix[4]arene for dual colorimetric Ag + and Hg 2+ detection. Anal Chim Acta 2020; 1104:147-155. [PMID: 32106946 DOI: 10.1016/j.aca.2020.01.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 12/23/2019] [Accepted: 01/02/2020] [Indexed: 02/02/2023]
Abstract
A new paper-based analytical device based on bulk ion-selective optodes (ISOs) for dual Ag+ and Hg2+ detection has been developed. A plasticized PVC hydrophobic phase composed of 25,27-di(benzothiazolyl)-26,28-hydroxycalix[4]arene (CU1) as an ion-selective ionophore, potassium tetrakis(4-chlorophenyl)borate as an ion-exchanger and chromoionophore XIV as a lipophilic pH indicator was entrapped in the pores of cellulose paper. This paper strip showed higher selectivity for Ag+ and Hg2+ over common alkali, alkaline earth and some transition metal ions with a color change from blue to yellow. With the proposed sensor, Ag+ and Hg2+ can be measured with the range of 1.92 × 10-6 to 5.00 × 10-3 M for Ag+ and 5.74 × 10-7 to 5.00 × 10-5 M for Hg2+ with a limit of detection of 1.92 × 10-6 M for Ag+ and 5.74 × 10-7 M for Hg2+. The proposed sensor was successfully applied to determine the amount of mercury in various water sources and the amount of silver in cleaning product samples containing silver nanoparticles (AgNPs). The results were in good agreement with inductively couple plasma-optical emission spectrometric measurements (ICP-OES).
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Apichai S, Wang L, Grudpan K, Bakker E. Renewable magnetic ion-selective colorimetric microsensors based on surface modified polystyrene beads. Anal Chim Acta 2020; 1094:136-141. [DOI: 10.1016/j.aca.2019.10.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 09/30/2019] [Accepted: 10/07/2019] [Indexed: 11/24/2022]
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Wang X, Sun M, Ferguson SA, Hoff JD, Qin Y, Bailey RC, Meyerhoff ME. Ionophore‐Based Biphasic Chemical Sensing in Droplet Microfluidics. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902960] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xuewei Wang
- Department of Chemistry University of Michigan 930 N University Ann Arbor MI 48109 USA
| | - Meng Sun
- Department of Chemistry University of Michigan 930 N University Ann Arbor MI 48109 USA
- Department of Biophysics University of Michigan 930 N University Ann Arbor MI 48109 USA
| | - Stephen A. Ferguson
- Department of Chemistry University of Michigan 930 N University Ann Arbor MI 48109 USA
| | - J. Damon Hoff
- Department of Biophysics University of Michigan 930 N University Ann Arbor MI 48109 USA
| | - Yu Qin
- Department of Chemistry University of Michigan 930 N University Ann Arbor MI 48109 USA
| | - Ryan C. Bailey
- Department of Chemistry University of Michigan 930 N University Ann Arbor MI 48109 USA
| | - Mark E. Meyerhoff
- Department of Chemistry University of Michigan 930 N University Ann Arbor MI 48109 USA
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9
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Ionophore‐Based Biphasic Chemical Sensing in Droplet Microfluidics. Angew Chem Int Ed Engl 2019; 58:8092-8096. [DOI: 10.1002/anie.201902960] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 04/14/2019] [Indexed: 01/24/2023]
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Day C, Søpstad S, Ma H, Jiang C, Nathan A, Elliott SR, Karet Frankl FE, Hutter T. Impedance-based sensor for potassium ions. Anal Chim Acta 2018; 1034:39-45. [PMID: 30193638 DOI: 10.1016/j.aca.2018.06.044] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 06/07/2018] [Accepted: 06/15/2018] [Indexed: 11/17/2022]
Abstract
A conductometric sensor for potassium ions in solution is presented. Interdigitated, planar gold electrodes were coated with a potassium-selective polymer membrane composed of a poly(vinyl chloride) matrix with about 65 wt% of plasticiser and 2-5 wt% of a potassium-selective ionophore. The impedance of the membrane was measured, using the electrodes as a transducer, and related to the concentration of potassium in a sample solution in contact with the membrane. Sensitivity was optimised by varying the sensor components, and selectivity for potassium over sodium was also shown. The resulting devices are compact, miniature, robust sensors which, by means of impedance measurements, eliminate the need for a reference electrode. The sensor was tested for potassium concentration changes of 2 mM across the clinically relevant range of 2.7-18.7 mM.
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Affiliation(s)
- C Day
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom.
| | - S Søpstad
- Institute for Microsystems, University College of Southeast Norway, N-3184, Borre, Norway; Zimmer & Peacock AS, N-3183, Horten, Norway.
| | - H Ma
- Electrical Engineering Division, Engineering Department, University of Cambridge, 9 JJ Thomson Avenue, Cambridge, CB3 0FA, United Kingdom.
| | - C Jiang
- Electrical Engineering Division, Engineering Department, University of Cambridge, 9 JJ Thomson Avenue, Cambridge, CB3 0FA, United Kingdom.
| | - A Nathan
- Electrical Engineering Division, Engineering Department, University of Cambridge, 9 JJ Thomson Avenue, Cambridge, CB3 0FA, United Kingdom.
| | - S R Elliott
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom.
| | - F E Karet Frankl
- Cambridge Institute for Medical Research, Cambridge Biomedical Campus, Cambridge, CB2 0XY, United Kingdom.
| | - T Hutter
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom.
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Mikhelson KN, Peshkova MA. Advances and trends in ionophore-based chemical sensors. RUSSIAN CHEMICAL REVIEWS 2015. [DOI: 10.1070/rcr4506] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Bamsey M, Graham T, Thompson C, Berinstain A, Scott A, Dixon M. Ion-specific nutrient management in closed systems: the necessity for ion-selective sensors in terrestrial and space-based agriculture and water management systems. SENSORS (BASEL, SWITZERLAND) 2012; 12:13349-92. [PMID: 23201999 PMCID: PMC3545570 DOI: 10.3390/s121013349] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Revised: 09/03/2012] [Accepted: 09/10/2012] [Indexed: 11/17/2022]
Abstract
The ability to monitor and control plant nutrient ions in fertigation solutions, on an ion-specific basis, is critical to the future of controlled environment agriculture crop production, be it in traditional terrestrial settings (e.g., greenhouse crop production) or as a component of bioregenerative life support systems for long duration space exploration. Several technologies are currently available that can provide the required measurement of ion-specific activities in solution. The greenhouse sector has invested in research examining the potential of a number of these technologies to meet the industry's demanding requirements, and although no ideal solution yet exists for on-line measurement, growers do utilize technologies such as high-performance liquid chromatography to provide off-line measurements. An analogous situation exists on the International Space Station where, technological solutions are sought, but currently on-orbit water quality monitoring is considerably restricted. This paper examines the specific advantages that on-line ion-selective sensors could provide to plant production systems both terrestrially and when utilized in space-based biological life support systems and how similar technologies could be applied to nominal on-orbit water quality monitoring. A historical development and technical review of the various ion-selective monitoring technologies is provided.
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Affiliation(s)
- Matthew Bamsey
- Canadian Space Agency, Space Science and Technology, 6767 route de l’aéroport, Longueuil, QC J3Y 8Y9, Canada; E-Mails: (M.B.); (A.B.)
- Controlled Environment Systems Research Facility, School of Environmental Sciences, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada; E-Mails: (T.G.); (C.T.)
| | - Thomas Graham
- Controlled Environment Systems Research Facility, School of Environmental Sciences, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada; E-Mails: (T.G.); (C.T.)
| | - Cody Thompson
- Controlled Environment Systems Research Facility, School of Environmental Sciences, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada; E-Mails: (T.G.); (C.T.)
| | - Alain Berinstain
- Canadian Space Agency, Space Science and Technology, 6767 route de l’aéroport, Longueuil, QC J3Y 8Y9, Canada; E-Mails: (M.B.); (A.B.)
| | - Alan Scott
- COM DEV Ltd., 303 Terry Fox Dr., Suite 100, Ottawa, ON K2K 3J1, Canada; E-Mail:
| | - Michael Dixon
- Controlled Environment Systems Research Facility, School of Environmental Sciences, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada; E-Mails: (T.G.); (C.T.)
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