{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,11]],"date-time":"2026-07-11T06:18:14Z","timestamp":1783750694653,"version":"3.55.0"},"reference-count":28,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2020,6,25]],"date-time":"2020-06-25T00:00:00Z","timestamp":1593043200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001650","name":"German Academic Exchange Service New Delhi","doi-asserted-by":"publisher","award":["57299294"],"award-info":[{"award-number":["57299294"]}],"id":[{"id":"10.13039\/501100001650","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>In situ, continuous and real-time monitoring of respiration (R) and respiratory quotient (RQ) are crucial for identifying the optimal conditions for the long-term storage of fresh produce. This study reports the application of a gas sensor (RMS88) and a modular respirometer for in situ real-time monitoring of gas concentrations and respiration rates of strawberries during storage in a lab-scale controlled atmosphere chamber (190 L) and of Pinova apples in a commercial storage facility (170 t). The RMS88 consisted of wireless O2 (0% to 25%) and CO2 sensors (0% to 0.5% and 0% to 5%). The modular respirometer (3.3 L for strawberries and 7.4 L for apples) consisted of a leak-proof arrangement with a water-containing base plate and a glass jar on top. Gas concentrations were continuously recorded by the RMS88 at regular intervals of 1 min for strawberries and 5 min for apples and, in real-time, transferred to a terminal program to calculate respiration rates (     R   O 2        and      R    CO  2       ) and RQ. Respiration measurement was done in cycles of flushing and measurement period. A respiration measurement cycle with a measurement period of 2 h up to 3 h was shown to be useful for strawberries under air at 10 \u00b0C. The start of anaerobic respiration of strawberries due to low O2 concentration (1%) could be recorded in real-time.      R   O 2        and      R    CO  2        of Pinova apples were recorded every 5 min during storage and mean values of 1.6 and 2.7 mL kg\u22121 h\u22121, respectively, were obtained when controlled atmosphere (CA) conditions (2% O2, 1.3% CO2 and 2 \u00b0C) were established. The modular respirometer was found to be useful for in situ real-time monitoring of respiration rate during storage of fresh produce and offers great potential to be incorporated into RQ-based dynamic CA storage system.<\/jats:p>","DOI":"10.3390\/s20123589","type":"journal-article","created":{"date-parts":[[2020,6,25]],"date-time":"2020-06-25T10:36:54Z","timestamp":1593081414000},"page":"3589","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["In-Situ Measurement of Fresh Produce Respiration Using a Modular Sensor-Based System"],"prefix":"10.3390","volume":"20","author":[{"given":"Nandita","family":"Keshri","sequence":"first","affiliation":[{"name":"Department of Horticultural Engineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), 14469 Potsdam, Germany"},{"name":"Institut f\u00fcr Konstruktion, Mikro- und Medizintechnik, FG Agromechatronik, Technische Universit\u00e4t Berlin, Stra\u00dfe des 17. Juni 135, 10623 Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ingo","family":"Truppel","sequence":"additional","affiliation":[{"name":"Department of Horticultural Engineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), 14469 Potsdam, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6274-4596","authenticated-orcid":false,"given":"Werner B.","family":"Herppich","sequence":"additional","affiliation":[{"name":"Department of Horticultural Engineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), 14469 Potsdam, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5185-4880","authenticated-orcid":false,"given":"Martin","family":"Geyer","sequence":"additional","affiliation":[{"name":"Department of Horticultural Engineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), 14469 Potsdam, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cornelia","family":"Weltzien","sequence":"additional","affiliation":[{"name":"Department of Horticultural Engineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), 14469 Potsdam, Germany"},{"name":"Institut f\u00fcr Konstruktion, Mikro- und Medizintechnik, FG Agromechatronik, Technische Universit\u00e4t Berlin, Stra\u00dfe des 17. Juni 135, 10623 Berlin, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pramod V.","family":"Mahajan","sequence":"additional","affiliation":[{"name":"Department of Horticultural Engineering, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), 14469 Potsdam, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2020,6,25]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"381","DOI":"10.1016\/j.postharvbio.2013.07.030","article-title":"Identification of respiration rate and water activity change in fresh-cut carrots using biospeckle laser and frequency approach","volume":"86","author":"Alves","year":"2013","journal-title":"Postharvest Biol. 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