OBJECTIVES To determine whether environmental cleaning and contamination are associated with variation in the prevalence of methicillin-resistant Staphylococcus aureus (MRSA) between nursing homes. DESIGN Prospective study of environmental contamination and cleaning quality. SETTING Nursing home. PARTICIPANTS Ten California nursing homes. MEASUREMENTS Nursing homes were categorized into...

introduction: pulpectomy of primary teeth is commonly carried out with hand files and broaches; a tricky and time consuming procedure. the purpose of this in vitro study was to compare the cleaning efficacy and time taken for instrumentation of deciduous molars using hand k-files and flex master rotary system. materials and methods: in this study, 68 canals of 23 extracted primary molars with a...

cotton/polyester knitted fabrics as a major production of textile industry was treated with titanium dioxide nanosized particles. the treated fabric with nanosized tio2 became whiter with a good self-cleaning property. also the discoloration of reactive black 5 dye was studied and reported. the stabilization of tio2 on cotton/polyester knitted fabrics by citric acid (ca) with sodium hypophospha...

While specializing in primarily aqueous and semi-aqueous cleaning systems to replace hazardous solvents, TURI’ s Surface Cleaning Laboratory must also offer environmentally-friendlier chemical substitutions where water-based technologies do not apply. Media blasting for parts cleaning and supercritical extraction for precision cleaning are two options that will be reviewed on an application-spe...

Fouling is an age-old problem in many process industries. It is responsible for large energy and throughput losses, resulting in financial penalties and negative environmental impact. One effective mitigation strategy is the regular cleaning of fouled heat transfer devices. Optimization tools can be used to schedule the timing of cleaning actions in order to minimize the cost of fouling and imp...

Usable life of cleaning solutions in a model heat processing unit was studied by evaluation of the nature and quantity of residue remaining on the surface of the equipment after cleaning. Lipoidal residue was recovered from equipment surfaces by ether rinsing. A surface displacement technique was used to quantify the lipoidal material, which was characterized by gas-liquid chromatographic analy...

An X-ray fluorescence method for measuring the quantity of test matter removed from carpet by vacuuming and wet extraction in typical carpet cleaning processes is described. In this cleaning effectiveness analytical method, five different test compounds were incorporated into an artificial soil, which was then applied to a test carpet. X-ray fluorescence was used to quantify these elements afte...

Cleaning validation is required in the pharmaceutical field to avoid potential clinically significant synergistic interactions between pharmacologically active chemicals. A simple, sensitive and accurate HPLC method has been developed and validated for determination of Clobetasol Propionate residues on the surface of manufacturing equipement. Separation of Clobetasol Propionate and Related comp...

The association between moral purity and physical cleanliness has been widely discussed recently. Studies found that moral threat initiates the need of physical cleanliness, but actual physical cleaning and priming of cleaning have inconsistent effects on subsequent attitudes and behaviors. Here, we used resting-state functional magnetic resonance imaging to explore the underlying neural mechan...