نتایج جستجو برای: disinfection by

تعداد نتایج: 7049288  

Journal: :The Journal of prosthetic dentistry 2005
Maria Pappas David R Burns Peter C Moon James P Coffey

STATEMENT OF PROBLEM Clinicians have used disinfection materials to remove surface contaminants during cavity preparation. It has been postulated that disinfection materials may negatively affect shear bond strength of restorative materials. If so, large numbers of restorations may be predestined for early failure with the use of a disinfection protocol. PURPOSE The purpose of this study was ...

2013
Nabeel Ahmed Prasanna Neelakantan

Contemporary endodontics and the future of endodontics are based on regenerative strategies. Success of these regenerative endodontic treatments depends on disinfection of the root canal system. Current research in endodontics focuses on identifying the optimal methods of disinfection of root canal systems to achieve predictable results in revascularization therapy. Although the use of sodium h...

Journal: :American journal of infection control 2003
Ann Cozad Rhonda D Jones

This article reviews published literature to determine the role environmental disinfection plays in the prevention of infectious disease. Health benefits from disinfection have been established through studies of applications such as critical instrument sterilization, water treatment, and food production. Guidelines by the Centers for Disease Control and Prevention, the Food and Drug Administra...

Journal: :The Journal of hospital infection 2011
J J Cotter P Maguire F Soberon S Daniels J P O'Gara E Casey

The effective disinfection of hospital surfaces is recognised as an important factor in preventing hospital-acquired infections. The purpose of this study was to quantify the disinfection rate of a novel gas plasma system on clinically relevant biofilms. Clinical isolates of Staphylococcus epidermidis and meticillin-resistant Staphylococcus aureus (MRSA) were grown as biofilms on glass surfaces...

Journal: :تحقیقات نظام سلامت 0
علیرضا مصداقی نیا استاد، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران. فروغ واعظی دانشیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران. عماد دهقانی فرد گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران امیرحسین محوی استادیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران. کاظم ندافی دانشیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران. محمود علی محمدی استادیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، تهران، ایران. رضا قنبری

background: despite their simplicity and the low-cost, the conventional non-contact uv systems have low efficiency in water disinfection. the purpose of this study was to examine the possibility of upgrading these systems by some modifications in order to maximize the water contact with the uv radiation and as a result a better disinfection.    methods: in this study, two enhanced models of non...

2009
Martin Johannes Bek Sven Laule Christine Reichert-Jünger Rainer Holtkamp Michael Wiesner Cornelius Keyl

INTRODUCTION To evaluate the cause of methemoglobinemia in patients undergoing extended daily hemodialysis/hemodiafiltration we analyzed the relationship between methemoglobinemia and the water disinfection schedule of the hospital. METHODS We reviewed all arterial blood gas analyses, obtained over a one-year period, in patients undergoing extended hemodialysis/hemodiafiltration, and compared...

Journal: :Infection control and hospital epidemiology 1995
W A Rutala D J Weber

Endoscopes are used widely for the diagnosis and therapy of medical disorders. To prevent spread of nosocomial infection, all endoscopes should undergo thorough cleaning and high-level disinfection following each use. The Food and Drug Administration (FDA) has approved a user-friendly package label for one liquid chemical germicide that requires a 45-minute immersion at 25 degrees C to support ...

Journal: :Ultrasonics sonochemistry 2004
Torben Blume Uwe Neis

The objective of our work is to evaluate the scientific and economic potential of US application as a pre-treatment step in combination with UV to optimise the disinfection process of wastewaters. Ultrasound application of 20 s at low density of 30 W/l changed the particle size distribution (PSD) of the samples, the mean particle diameter dropped from 70 to 11 microm. Generally it is assumed th...

Journal: :Revue scientifique et technique 1995
G Salvat P Colin

The application and efficacy of cleaning and disinfection methods are reviewed, together with the relevant European and French legislation. European Commission Hygiene Directive 93/43/EEC of 14 June 1993 proposes the adoption of hazard analysis and critical control points (HACCP) for the meat industry, and this includes cleaning and disinfection. It is necessary to organise a team for washing, ...

2017
Qingxia Zhong Anna Carratalà Rachele Ossola Virginie Bachmann Tamar Kohn

The emergence of waterborne viruses with resistance to disinfection has been demonstrated in the laboratory and in the environment. Yet, the implications of such resistance for virus control remain obscure. In this study we investigate if viruses with resistance to a given disinfection method exhibit cross-resistance to other disinfectants. Chlorine dioxide (ClO2)- or UV-resistant populations o...

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