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Wang Xiangyou – One of the best experts on this subject based on the ideXlab platform.

  • Effect of precooling temperature on physiological quality of cold stored Agaricus bisporus
    International Journal of Agricultural and Biological Engineering, 2014
    Co-Authors: Wang Xiangyou, Tan Jincui, Wang Juan
    Abstract:

    Effect of precooling temperatures (2°C, 6°C, 10°C and 14°C) on the physiological quality of postharvest Agaricus bisporus during cold storage was investigated. After six hours’ precooling, Agaricus bisporus was stored at 3°C and sampled on day 3, 6 and 9, respectively, for physiological quality analysis. Results showed that physiological quality of the Agaricus bisporus increased with the decrease of precooling temperature in the range of 2-14°C. Precooling at 2°C before cold storage had a positive impact on the storage quality of Agaricus bisporus. The decrease of hardness, whiteness and pH value was delayed, while the increase of cell membrane permeability and PPO and POD activities was restrained. Whiteness value of the Agaricus bisporus precooled at 2°C was above 80 on day 9, which means it was still acceptable, but the Agaricus bisporus precooled at 6°C and 10°C lost their commercial values. Keywords: precooling, Agaricus bisporus, cold storage, precooling temperature, quality DOI: 10.3965/j.ijabe.20140702.013 Citation: Wang X Y, Tan J C, Wang J. Effect of precooling temperature on physiological quality of cold stored Agaricus bisporus. Int J Agric & Biol Eng, 2014; 7(2): 108-114.

  • Modelling of Agaricus bisporus Respiration Rate Based on Enzyme Kinetics
    , 2012
    Co-Authors: Wang Juan, Li Xia, Wang Xiangyou
    Abstract:

    The aim of this paper is to characterise the respiration rate of Agaricus bisporus as affected by MAP at 5, 10, 15 and 20°C. The experimental in-pack partial pressures of O2 and CO2 under all treatments was described for a storage period of 15h. A respiration model, based on Michaelis-Menten type enzyme kinetics, was proposed for predicting respiration rates of Agaricus bisporus as a function of O2 and CO2 volume fraction at the storage temperature. The relationship between maximum rate vm and temperature T was well described by the Arrhenius equation. The results suggest that, the respiration rate of Agaricus bisporus as well as vm increased with temperature, and it has a linear relationship between lnvm and T-1. Results of the study can be applied to the MAP design for Agaricus bisporus.

  • Effects of Relative Humidity on Postharvest Physiologyof Agaricus bisporus
    Storage and Process, 2006
    Co-Authors: Wang Xiangyou
    Abstract:

    The Effects of storage in different relative humidity(70%,80%,90%,100%)to postharvest physiology of Agaricus bisporus at 3 ℃ were studied by investigation the changing of Agaricus bisporus` appearance,weight losing rate,respiratory rate,browning degree and the active of PPO.The results show that weight losing rate,browning degree and the active of PPO all decreased with the increasing of relative humidity.The scarfskin of Agaricus bisporus which stored in 100 percent relative humidity felt pastiness.That affects Agaricus bisporus` appearance quality and value.All data were considered that the optimum condition of relative humidity is 93%~100% for postharvested Agaricus bisporus.

Xiangyou Wang – One of the best experts on this subject based on the ideXlab platform.

  • Respiration Model of Agaricus bisporus under Modified Atmosphere Packaging Based on Enzyme Kinetics
    Advanced Materials Research, 2011
    Co-Authors: Juan Wang, Xiangyou Wang
    Abstract:

    The dynamic changes of the oxygen and carbon dioxide volume fraction,in modified atmosphere packaging of Agaricus bisporus were studied at different temperature. The respiration rate of Agaricus bisporus under modified atmosphere packaging at any instant of time were determined by improved permeable system. A respiration model, based on Michaelis-Menten type enzyme kinetics, was proposed for predicting respiration rates of Agaricus bisporus as a function of O2 and CO2 volume fraction at the storage temperature. The model parameters were estimated by fitting the model to the experimental data by non-linear regression using Matlab. The effection on the model parameters of temperature was described by Arrhenius equation. The results suggest that, the low temperature and MAP could inhibit the respiration of mushroom, which is essential to the design of modified atmosphere package.

  • Respiration Rate Models of Agaricus bisporus under Modified Atmosphere Packaging
    International Journal of Food Engineering, 2009
    Co-Authors: Xiangyou Wang, Juan Wang, Zhe Liu
    Abstract:

    The package headspace composition, in terms of O2 and CO2 concentrations, in modified atmosphere packaging (MAP) of Agaricus bisporus at 2, 4, 8 and 20°C were respectively monitored within 15h by a gas chromatograph. The respiration rate of Agaricus bisporus under modified atmosphere packaging at any instant of time were calculated by a C program based on permeable system. The dependence of respiration rate on gas composition was well described by a Michaelis-Menten type enzyme kinetic equation with uncompetitive CO2 inhibition. The model parameters were estimated by fitting the model to the experimental data by non-linear regression using Excel. The relationship between maximum rate Vm and temperature was well described by the Arrhenius equation. The results suggest that, the respiration rate of Agaricus bisporus as well as Vm increased with temperature, and it has a linear relationship between lnVm and T-1. Results of the study can be applied to the MAP design for Agaricus bisporus.

  • Browning Substrates in Agaricus bisporus
    2007 Minneapolis Minnesota June 17-20 2007, 2007
    Co-Authors: Jiying Zhu, Xiangyou Wang, Juan Wang
    Abstract:

    The main browning substrates in Agaricus bisporus (F56, the main breed widely planted in China) were studied by high-pressure liquid chrochromatography (HPLC) and UV-absorption spectrums in this paper. The results showed that there were many kinds of polyphenols in Agaricus bisporus, in which the content of tyrosine was the highest, reached to 0.503mg.g-1FW and the content of tyrosine decreased quickly with the increasing of browning degree during storage. The UV-absorption spectrums of standard tyrosine sample, the products of tyrosine reacting to PPO from Agaricus bisporus and the native browning products in Agaricus bisporus were compared. The result showed that the absorption peak of the products of tyrosine reacting to PPO from Agaricus bisporus and the native browning products in Agaricus bisporus appeared at 240nm, but the absorption peak of standard tyrosine sample appeared at 320nm. So, tyrosine was proved the main browning substance in Agaricus bisporus.

Yang Zhi-lei – One of the best experts on this subject based on the ideXlab platform.

Wen Zhi-qiang – One of the best experts on this subject based on the ideXlab platform.

  • Comparison of Control Effect of Fungicides against Agaricus bisporus Wet Bull Caused by Mycogone perniciosa Magn
    Edible Fungi of China, 2009
    Co-Authors: Wen Zhi-qiang
    Abstract:

    11 kinds of fungicides were selected to test their control effect against Agaricus bisporus wet bull caused by Mycogone perniciosa and the effect on the growth of Agaricus bisporus in the mushroom house were tested. The results indicated that 11 kinds of fungicides had obvious difference towards control effect against Agaricus bisporus wet bull caused by Mycogone perniciosa and effect on the growth of Agaricus bisporus. Among them, 45% EW with 500 times liquid of Thiabendazol was the best with the control effect of 93.7% by covering soil and 89.1% by dealing cover soil with spraying during fruiting period. Meanwhile, it had not adversary effect on mycelial growth and fruit body development of Agaricus bisporus. Comprehensive performance of the other fungicides were non-ideal.

Guo Hui – One of the best experts on this subject based on the ideXlab platform.