Colophonium (rosin, CAS no. 8050-09-7) is a complex mixture of >100 different compounds derived from pine trees. It is a good tackifier, can be used as an emulsifier, and has acid properties without causing corrosion. Because of these properties, colophonium is used in various products, such as soldering fluxes, paper, cosmetics (depilatory waxes, soaps, hair gel, and nail polish), cutting flui...

[The hobby of ocean] “sailing is like standing day after day in a cold shower tearing up five-dollar bills.” Anonymous blue water sailor In a Luann comic strip Luann is doing her nails. Brad asks “What’s that, another new nail polish?” Luann answers “Yup, after it dries, it still looks wet.” Brad asks “Why do you want it to look wet when it’s dry?” Luann replies testily “I don’t know Brad. I’m ...

Given its vapor pressure, toluene tends to partition to the atmosphere. Automobile emissions are the principal source of toluene in ambient air, with levels fluctuating in proportion to automobile traffic. Toluene can also be a common indoor contaminant, and indoor air concentrations are often several times higher than outside air. This is likely due to release of toluene from common household ...

Recent advances in the manipulation and control of layered, two-dimensional materials has given way to construction heterostructures with new functionality unprecedented electronic properties. In this study, we present a simple technique assemble transfer van der Waals using common nail polish. Commercially available polish acts as resilient sticky polymer, allowing for fabrication complex mult...

The aim of this study was to investigate the effects of some acidic drinks on dentin erosion, using methods of surface profile (SP) analysis and energy-dispersive X-ray fluorescence spectrometry (EDXRF). One hundred standardized dentin slabs obtained from bovine incisor roots were used. Dentin slabs measuring 5x5 mm were ground flat, polished and half of each specimen surface was protected with...

Background: Cosmetics have been used since the oldest known civilizations, and nowadays almost everybody resorts to beauty products.. Reactions to cosmetics constitute a small but significant number of cases of contact dermatitis that can present with varied appearances. Aims and objective: evaluate cosmetic dermatitis using cosmetics. Methods: The study was performed over a period of 6 months,...

Forensic practitioners and crime laboratories regularly collect and analyze fingernail evidence; however, the best techniques for processing such evidence have not been established. In this study, numerous aspects of fingernail evidence processing-collection of exogenous cells, transportation, purification of DNA, and STR analysis-were analyzed using fingernails harboring applied blood or epith...