نتایج جستجو برای: after pre cleaning
تعداد نتایج: 1917410 فیلتر نتایج به سال:
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...
Introduction: One of the most important steps in root canal therapy is removal of microorganisms presented in the root canal by means of cleaning and shaping with a variety of manual and rotary instruments. The aim of this study was to compare the amount of dentinal debris remained in canal after application of two nickel titanium rotary files(Flexmaster, Twisted) with stereomicroscope. Method...
Salmonella sp. continues to be one of the most important foodborne pathogens. Control measures in terms of cleaning and disinfection on food production plants are very important for limiting the risk of contaminated food products to reach the consumer. In the last decade concern has arisen that bacteria exposed to disinfectants can develop resistance toward disinfectants and can have a higher r...
It is posted here for your personal use. No further distribution is permitted. Data cleaning is a pre-processing technique used in most data mining problems. The purpose of data cleaning is to remove noise, inconsistent data and errors in order to obtain a better and representative data set to develop a reliable prediction model. In most prediction model, unclean data could sometime affect the ...
Inside air ventilation ducts of the confined space such as subway stations become contaminated by various contaminants and particular matters after long time operation. The accumulated various pollutants at inner duct surface easily transport and cause secondary air contamination and injure subway passengers’ respiratory system and health. In fact, only periodic duct cleaning works can improve ...
BACKGROUND Early after intubation, a layer of biofilm covers the inner lumen of the endotracheal tube (ETT). Cleaning the ETT might prevent airways colonization by pathogens, reduce resistance to airflow, and decrease sudden ETT obstruction. We investigated the effectiveness of a cleaning closed suction system in maintaining the endotracheal tube free from secretions. METHODS We conducted a s...
objective: the aim of this study was to evaluate and compare the cleaning ability and instrumentation time of manual and rotary methods used for preparation of primary anterior teeth. materials and methods: forty-four primary anterior teeth were used in this experimental study. access cavities were prepared and india ink was injected into the canals. the samples were divided into three groups a...
protein and it is conceivable that some residual soiling may still have been present on the diathermy pencils but below the level of detection. Visual inspection of all of the diathermy pencils also revealed a scored topography due to repeated use and cleaning (Figure 1). The rough surfaces of the pencils may serve as a base for residual soiling from human sources to remain firmly attached desp...
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