不同品质鸡蛋的脂质研究

目的 研究鸡蛋品质与蛋黄中脂质的相关性。方法 利用液相色谱-四极杆-飞行时间质谱法(liquid chromatography-Q-time of flight mass spectrometry, LC-Q-TOF MS)对鸡蛋中的脂质进行分析。选用鸡蛋的价格作为具体量化的效应指标, 将质谱数据进行差异分析及主成分分析。结果 不同脂质峰面积与价格存在统计学关系。建立了鸡蛋价格预测模型, 并对2种鸡蛋样品进行价格预测, 预测价格与实际价格偏差在20%以内。结论 该鸡蛋优质度评估方法具有一定的可行性。     

高二氧化碳不同冲击处理时间结合打孔气调贮藏对青香蕉苹果耐贮性的影响

水果采后用高CO2处理,近年来已有不少报道,有些成果已应用于商业性生产。我们曾报道,倭锦苹果采后用高CO2处理,然后结合打孔法气调贮藏,有助于抑制果实乙稀生成和后熟进程,保持果实较好品质,延长果实的贮藏期。青香蕉苹果是我国主产的晚熟品种之一,贮藏期间对 CO2有较强的耐受力。但其高     

温州蜜柑低温伤害时乙烯大量产生的原因

<正>温州蜜柑贮藏过程中对低温十分敏感,一般在0~2℃的冷库中贮藏一个月左右,就会发生低温伤害(也称水肿病),使商品造成严重损失,是目前生产中有待解决的问题     

Humidity sensing properties of Nation and sol-gel derived SiO2/Nafion composite thin films

Nafion, sol-gel derived SiO₂ and SiO₂/Nafion composite films were prepared through casting and dip-coating methods. Impedance response of the films to relative humidity and the stability of the response against different aging environments were examined. The response to relative humidity of each film was analyzed with their complex impedance spectra at different humidities.     

Comparison of conductometric humidity-sensing polymers

Films of differently modified PVA (polyvinyl alcohol), TA (phthalocyaninosilicon) and Nafion in different ionic forms (H⁺, Li⁺, and Na⁺) have been prepared by using casting methods. Impedance changes of the films with relative humidity are examined. The results demonstrate that the content and hydrophilicity of the hydrophilic group in PVA, ionization of TA, and the cation in Nafion have significant effects on sensing properties of the films.