The effect of lubricants on powder flowability for pharmaceutical application. (65/71)

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Attitudes and approaches to vaginal atrophy in postmenopausal women: a focus group qualitative study. (66/71)

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The quantitative surface analysis of an antioxidant additive in a lubricant oil matrix by desorption electrospray ionization mass spectrometry. (67/71)

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Synthesis and effect of fatty acid amides as friction modifiers in petroleum base stock. (68/71)

Fatty acid amides were prepared by using Lewis acid as a catalyst. The products from reaction was subjected to solvent extraction with chloroform and then followed by purification with n-hexane, ethanol and acetonitrile. Fatty acid amide, characterized by various physicochemical and tribological properties like wear scar, weld load and coefficient of friction. These compounds found good antiwear (AW) and extreme pressure (EP) additive. The addition of various EP and AW additives in lubricating oil is an important and effective way to reduce friction and wear. Fatty acid amides were used as antiwear and friction modifier additive and a comparative study was carried out for 1%, 3%, 5% additive blend with commercial petroleum base stocks 150N and 500N.  (+info)

Adsorption of 99mTc-sestamibi onto plastic syringes: evaluation of factors affecting the degree of adsorption and their impact on clinical studies. (69/71)

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Outcomes of a community-based HIV-prevention pilot programme for township men who have sex with men in Cape Town, South Africa. (70/71)

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A study of micronized poloxamers as lubricants in direct compression of tablets. (71/71)

The study evaluates the micronized poloxamers Lptrol micro127 (poloxamer 407) and Lptrol micro 68 (poloxamer 188) as lubricants in combination with the dry binders microcrystalline cellulose and spray-dried lactose. Magnesium stearate was employed as the comparative lubricant. The parameters under study included energy for friction, plasticity, ejection force, tensile strength of tablets, and disintegration time of tablets. The factors of influence were the concentration of lubricants, compression force, and mixing parameters. The lubricating effect of micronized poloxamers was smaller than that of magnesium stearate. Higher concentrations of poloxamers decreased the tensile strength of tablets from microcrystalline cellulose, shortened the disintegration time, and slightly prolonged the disintegration time in the case of spray-dried lactose. Parameters of mixing of dry binders with poloxamers influenced the tested parameters of compression more in the case of spray-dried lactose. In microcrystalline cellulose, they influenced more the tensile strength and disintegration time of tablets.  (+info)