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Determination of oxygen permeability and mechanical properties of the aluminium paper foils
packaging modulus of elasticity butter curd
2014/11/28
The paper deals with the determination of the oxygen permeability and mechanical properties of butter and curd aluminium paper foils Radaflex applied in the food packaging. Foil Radaflex is a paper fo...
Silage-corn harvesting machinery traffi c eff ects on soil bulk density and water permeability
repeated traffi c passes silage harvester soil compaction soil physical damage soil porosity
2014/2/24
Soil compaction caused by machinery traffi c aff ects the growth of agricultural crops and also has environmental eff ects
like soil damage and erosion. Field experiments were cond...
盘式吸渗仪吸渗率计算方法比较（Comparison among Permeability Methods of Disc Infiltrometer）
吸渗率 盘式吸渗仪 计算方法
2009/9/25
选用盘径为5cm和15cm的盘式吸渗仪，对杨凌塿土（粘土）和神木砂黄土（砂壤土）两种质地的土壤在0、－3、－6、－9、－12cm 水头5种负压下进行了室内吸渗实验，分析了不同盘径和负压对累积吸渗量的影响；并选用4种吸渗率公式对这两种质地土壤吸渗率进行了计算，以Vandervaere法为参考方法对该4种方法的适用性进行了分析。结果表明，在相同的时间内，两种土壤5 cm盘径下的累积吸渗量均大于15 c...
温度对气调包装薄膜透气性的影响（Effects of Temperature on Gas Permeability of Films for Modified Atmosphere Packaging）
气调包装 薄膜材料 透气系数
2010/2/26
通过小袋法测定了不同材料薄膜分别在2、8、14、20℃下的薄膜透气系数，分析了温度对薄膜透气系数和透气系数比的影响。试验得出：随着温度的升高果蔬包装薄膜的透气系数增大，薄膜材料LDPE的透气系数比显著上升，但薄膜材料PVC的透气系数比在试验温度范围内呈现不同的变化趋势。薄膜透气系数与绝对温度之间满足Arrhenius方程，透气系数的自然对数值与绝对温度的倒数值之间呈显著的线性关系。 The gas...