The purpose of this laboratory study was to assess the potential cleaning efficacy of nine different toothbrushes around brackets in vitro. Standard and Mini Diamond brackets were fixed on coloured teeth in a special model, coated with white titanium oxide, brushed in a machine with different manual toothbrushes (three different types: planar, staged, and v-shaped bristle field), and tested wit...

Background: Manufacturers’ recommendations on cleaning of tracheostomy tubes focus on general warning information and nonMatthias Leonhard Ojan Assadian specific manual cleaning procedures. The aim of this experimental study Michaela Zumtobel was to evaluate different reprocessing methods and to determine the Berit Schneider-Stickler mechanical integrity and functionality of tracheostomy tubes ...

A UHV atomic hydrogen-cracking cell has been constructed to produce atomic hydrogen in order to perform in-situ cleaning of semiconductor samples. The cell was calibrated and tested with the objective of cleaning the III-V semiconductor samples such as GaAs. Mass spectroscopy studies during the atomic hydrogen cleaning of the GaAs samples revealed the chemical process of the hydrogen cleaning. ...

Background The process of cleaning and disinfection of animal transport vehicles after unloading animals at the abattoir is a critical control point regarding proper hygiene. It is an important step regarding the biosecurity. In the present study, a status quo analysis of the currently performed cleaning and disinfection measures of animal transport vehicles was carried out at the vehicle washi...

In this article we describe the assessment and control of lead dust exposure in the Treatment of Lead-exposed Children (TLC) Trial, a clinical trial of the effects of oral chelation on developmental end points in urban children with moderately elevated blood lead levels. To reduce potential lead exposure from settled dust or deteriorated paint during the drug treatment phase of the trial, the h...

E3all grid arrays (E3GAs), and other area array packages, are becoming more as a way to increase component pin count while avoiding the manufacturing prominent difficulties inherent In processing quad flat packs (QFPs). The JF)L Electronic Packaging and Fabrication section is currently conducting process development in order to be able to effectively place BGAs on printed wiring boards (PWE3S)....

In this study, the effects of the size and Chinese traditional processing (including elutriation, water cleaning, acid cleaning, alkali cleaning) on realgar nanoparticles (RN)-induced antitumor activity in human osteosarcoma cell lines (MG-63) and hepatoma carcinoma cell lines (HepG-2) were investigated. The human normal liver cell line (L-02) was used as control. RN was prepared by high-energy...

As machine design in the cotton ginning industry advances, the trend is towards systems that allow for dynamic adjustment of cleaning capabilities. There is however, a lack of real-time sensors suitable for detection of the trash content that would allow for determination of the trash content before the machine performs the cleaning. Current state of the art sensors typically sense the product’...

OBJECTIVE The prevalence of serious infections caused by multidrug-resistant pathogens transmitted in the hospital setting has reached alarming levels, despite intensified interventions. In the context of mandates that hospitals ensure compliance with disinfection procedures of surfaces in the environment surrounding the patient, we implemented a multihospital project to both evaluate and impro...

This paper describes the design of household intelligent cleaning robot, which is an innovative work of collegiate contest. This paper describes the general structure of system, hardware circuit design and software program design. The robot can achieve autonomous movement, garbage cleaning, obstacle avoidance and other functions. It can work in the home, library, exhibition halls and other indo...