关于牙膏纸箱堆码压力与整体蠕变变形可靠性研究

通过牙膏纸箱堆码整体蠕变的实验数据，利用可靠性理论，统计出在一定堆码层数下，最底层牙膏纸箱所受的堆码压力与纸箱整体蠕变变形之间的可靠性关系。     

Identification of Crystalline Phases in Toothpaste byPowder Diffractometry

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高效液相色谱法同时测定牙膏中的维生素B_2、维生素B_3和维生素B_6

建立了同时测定牙膏中维生素B_2、维生素B_3和维生素B_6的检测方法。样品经水分散溶解后,用丙酮沉淀杂质,采用Waters T3色谱柱分离,HPLC测定,实验优化了沉淀剂的选择及用量等条件。结果表明,待测维生素在各自浓度范围内线性良好,相关系数均大于0.999,方法检出限在0.60~1.20 mg/kg之间,在高中低三个添加水平的平均回收率为95.0%~103.7%,相对标准偏差为1.67%~6.96%。该方法具有前处理简单、定量准确、灵敏快速的特点,适用于牙膏中维生素B_2、维生素B_3和维生素B_6的定量分析检测。     

牙膏中氟化物含量测定

用氟离子选择电极法,对市售十几种牙膏的氟化物含量进行了直接测定。回收率９０．８％－１０９％,为牙膏中氟化物测定提供了较快速的方法。     

离子选择电极法测定牙膏中氟含量的研究与探讨

本文对离子选择电极法测定牙膏中氟化物进行了研究与探讨.讨论了仪器精度、共存离子引入的误差及干扰、测定的pH值范围、电极相关因素的影响、搅拌的影响和测定中应注意的问题等因素对氟离子选择电极法测定牙膏中氟化物的影响。该方法具有选择性好,准确、快速、检测范围宽的特点.     

牙膏纸箱堆码时间的统计处理

为了研究在不同工况下牙膏纸箱的堆码层数和堆码时间的关系,指导牙膏纸箱的储运,通过对样本的堆码试验,利用统计分析方法对其堆码中产生整体蠕变的时间数据进行处理,然后在一定置信度下进行参数和区间估计,从而得出牙膏纸箱堆码时产生蠕变的大小和堆码时间的关系,确保牙膏纸箱堆码整体蠕变时间确定的可靠性.     

流变学在牙膏配方研制中的应用

本文通过对牙膏膏体流变性能的研究，证明了用已知的流变学数据指导牙膏配方研制的可行性，为制定牙膏配方提供了理论依据。     

新型矿物牙膏磨擦剂的研究与开发

分析了牙膏磨擦剂的技术要求,据此以天然矿物为基本原料,通过技术加工,制备了新型矿物牙膏磨擦剂,经检验和制成牙膏使用,洁齿效果好,接近白炭黑水平。     

电位滴定法测定牙膏中的氟

研究了氟的分析方法：比色法、离子色谱法、离子选择电极法。进而建立了测定牙膏中氟的新方法，利用氟离子选择电极，根据电位突跃来判断终点的电位滴定法。回收率为95％～103％，相对标准偏差RSD为0．5％～1．3％。     

Matching the nano- to the meso-scale: Measuring deposit–surface interactions with atomic force microscopy and micromanipulation

Many researchers have studied the effects of changing the surface on fouling and cleaning. In biofouling the ‘Baier curve’ is a well-known result which relates adhesion to surface energy, and papers on the effect of changing surface energy to food fouling can be found more than 40 years ago. Recently the use of modified surfaces, at least at a research level, has been widespread. Here two different ways of studying surface–deposit interactions have been compared. Atomic force microscopy (AFM) is a method for probing interactions at a molecular level, and can measure (for example) the interaction between substrate and surfaces at a nm-scale. At a μm–mm level, we have developed a micromanipulation tool that can measure the force required to remove the deposit; the measure incorporates both surface and bulk deformation effects. The two methods have been compared by studying a range of model soils: toothpaste, as an example of a soil that can be removed by fluid flow alone, and confectionery soils. Removal has been studied from glass, stainless steel and fluorinated surfaces as examples of the sort of surfaces that can be found in practice. AFM measurements were made by using functionalized tips in force mode. The two types of probe give similar results, although the rheology of the soil affects the measurement from the micromanipulation probe under some circumstances. The data suggests that either method could be used to test candidate surfaces.