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Respiration Rate and Respiratory Quotient of Harvested Oyster Mushrooms at Different Storage Temperatures

Gede Arda, S.TP., M.Sc., GEDE ARDA (2011) Respiration Rate and Respiratory Quotient of Harvested Oyster Mushrooms at Different Storage Temperatures. Agrotekno, 16. ISSN 20886497

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Abstract

Temperature management on postharvest handling of fruits and vegetables has an important role to preserve the product to prolong their sales appeal period or shelf life. Besides, availability of gases around the product influences the product behavior also. The important aspects of the related-physiological behaviors are respiration rate and respiratory quotient. Those provide the initial information about the changes of gas composition in inner space of storage jar as well as the sign of the shift of aerobic to anaerobic respiration occurred. Based on that issue, the aim of this work is to study the physiological behaviors of Oyster mushroom on various temperature storage and gas concentration. The object of study was Oyster mushrooms (Pleurotus ostreatus) produced by the local farmers. Respiration rate was determined by closed or static system until gas composition shows 1-2% of O2 and 20-21 % of CO2 under 5 0C, 15 0C and ambient storage temperature. The result showed that respiration rate of Oyster mushroom was influenced by storage temperature with activation energies of 2.33 kJ/mol and 2.08 kJ/mol for O2 consumption and CO2 evolution respectively. Respiration rates resulted from this measurement were 55.45 mlO2/kg.h, 135.97 mlO2/kg.h, 318.97 mlO2/kg.h and 61.59 mlCO2/kg h, 165.34 mlCO2/kg h, 335.76 mlCO2/kg h for 5 0C, 15 0C and ambient storage temperatures respectively. In this work also was found that Oyster mushrooms were not CO2 sensitive (tolerant of high CO2 concentration). The value of respiratory quotients were not much different although the concentrations of CO2 reach more than 15 %. Respiratory quotient of mushroom under 5 0C, 15 0C and ambient storage temperatures were 1.11, 1.22 and 1.05 respectively.

Item Type: Article
Uncontrolled Keywords: Oyster mushroom, Pleurotus ostreatus, respiration rate, respiratory quotient, activation energy
Subjects: L Education > L Education (General)
Divisions: Faculty of Law, Arts and Social Sciences > School of Education
Depositing User: Mr. Repository Admin
Date Deposited: 07 Jun 2016 21:58
Last Modified: 21 Jun 2016 05:58
URI: http://erepo.unud.ac.id/id/eprint/8070

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