The effects of two lubricating oils on the trophic diversity of a nematode community of a Tunisian lagoon were investigated in a microcosm experiment. Sediment from a pristine site in Ghar El Melh lagoon (Western Mediterranean) was treated with mineral oil (Mobil 20 W-50), a synthetic lubricant (Mobil 0 W-40), the same two lubricants after use in a vehicle. Univariate analysis showed significan...

This experiment tested the influence of the lubricant magnesium stearate on the effectiveness of the drug acetaminophen in a mixture of glidants and excipients. There are many factors that can cause variation in the effectiveness of drugs in tablet form. Chief among them are the lubrication and glidant percentages, shear rate, tablet hardness and hydrophobicity. In order to allow the powder to ...

This work deals with the modelling of lubricated revolute joints in multibody mechanical systems. In most machines and mechanisms, the joints are designed to operate with some lubricant fluid. The high pressures generated in the lubricant fluid act to keep the journal and the bearing apart. Moreover, the thin film formed by lubricant reduces friction and wear, provides load capacity and adds da...

Motivated by the development of lubricant-infused slippery surfaces, we study a sessile drop of a nonvolatile (ionic) liquid which is embedded in a slowly evaporating lubricant film (n-decane) on a horizontal, planar solid substrate. Using laser scanning confocal microscopy we imaged the evolution of the shape of the liquid/liquid and liquid/air interfaces, including the angles between them. Re...

Condensation of water from the atmosphere on a solid surface is an ubiquitous phenomenon in nature and has diverse technological applications, e.g. in heat and mass transfer. We investigated the condensation kinetics of water drops on a lubricant-impregnated surface, i.e., a micropillar array impregnated with a non-volatile ionic liquid. Growing and coalescing drops were imaged in 3D using a la...

Replacing R-22 by HFC refrigerants in stationary air conditioners is forcing oil producers to develop a new lubricant which has good miscibility with HFC, lubricity and electric resistivity. Mitsui has selected a carbonate compound for a new lubricant candidate with HFC and developed it forcusing on its thermal stability, which is one of the most important factors to get good lubricity. By supp...

The achievement of high density at reasonable cost would be a definite advantage for the production of P/M components requiring high static and dynamic properties. The use of the electrostatic die wall lubrication technique appears as a very attractive route to promote densification. By reducing the level of friction at die walls, this technique should have the potential to also reduce density ...

The objective of this paper was to study the performance of household refrigerator having both air and water-cooled condenser, with 0.06% mass fraction CuO nanoparticle-lubricant mixture and different types of compressor oils. The experiment was done using HFC134a as the refrigerant, CuO nanoparticles, Polyol-ester oil (POE) oil which is used as the conventional lubricant in the household refri...

Objectives: 1) HIV prevention, using a mechanical cervical barrier in combination with microbicide. 2) Prevention of pregnancy. 3) Shield the cervix to prevent sperm penetration and Gonorrhea, Chlamydia and HIV virus invasion. Methods: We investigated a new FDA approved cervical barrier FemCap (Figure 1). The FemCap is a contraceptive device that is designed with a unique delivery system for mi...