氧浓度对丝绸上霉菌生长的影响

Effects of Oxygen Concentration on the Growth of Moulds on Silk

以黑曲霉、桔青霉为例,利用物联网系统监测培养箱温度、湿度和氧浓度,研究氧浓度对黑曲霉、桔青霉生长的影响。结果发现,在温度(28±1)℃、湿度60%~80%条件下培养7 d,黑曲霉生长所需的氧浓度最低值为0.7%。高浓度氧气能满足其有氧代谢,从而使生长发育达到饱和状态;低浓度氧气不能满足其有氧代谢,从而导致生长发育不充分。当氧浓度低至0.7%时,黑曲霉停止代谢活动。氧浓度对桔青霉生长存在类似的影响。研究丝绸文物上的常见霉菌生长与氧浓度的规律以及氧浓度阈值,为丝绸文物保藏及其装置开发设计提供了理论依据。

Taking Aspergillus niger and Penicillium citrinum as examples,the internet of things system was used to monitor the temperature,humidity and oxygen concentration of the incubator,and the influences of oxygen concentration on the growth of A.niger and P.citrinum were preliminarily studied.Through the preliminary study,it was found that the minimum oxygen concentration required for the growth of A.niger should be 0.7%when the temperature was(28±1)℃,the humidity was 60%-80%,and the culture lasted for 7 days.High concentration oxygen could satisfy its aerobic metabolism and make its growth and development reach saturation state,while low concentration oxygen could not satisfy its aerobic metabolism and cause insufficient growth and development.The metabolic activity of A.niger stopped when the oxygen concentration in the system was as low as 0.7%.The growth of P.citrinum was similar to the above rule in oxygen concentration.The study on the rule of the growth of common molds on silk cultural relics and the oxygen concentration and the oxygen concentration threshold provided the theoretical basis for the preservation of silk cultural relics and the development and design of its devices.