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Showing "Comparision Different Methods Enviromennt Disinfection" PubMed Articles 1–25 of 12,000+

Photocatalytic disinfection of surfaces with copper doped Ti02 nanotube coatings illuminated by ceiling mounted fluorescent light.

High economic burden is associated with foodborne illnesses. Different disinfection methods are therefore employed in food processing industry; such as use of ultraviolet light or usage of surfaces with copper-containing alloys. However, all the disinfection methods currently in use have some shortcomings. In this work we show that copper doped TiO2 nanotubes deposited on existing surfaces and illuminated with ceiling mounted fluorescent lights can retard the growth of Listeria Innocua by 80% in seven hours...

Improved blackwater disinfection using potentiodynamic methods with oxidized boron-doped diamond electrodes.

Electrochemical disinfection (ECD) has become an important blackwater disinfection technology. ECD is a promising solution for the 2 billion people without access to conventional sanitation practices and in areas deficient in basic utilities (e.g., sewers, electricity, waste treatment). Here, we report on the disinfection of blackwater using potential cycling compared to potentiostatic treatment methods in chloride-containing and chloride-free solutions of blackwater (i.e., untreated wastewater containing f...

Guideline Implementation: Manual Chemical High-Level Disinfection: 1.5

The Spaulding system recommends sterilization or, at minimum, high-level disinfection for semicritical medical items (ie, items that come into contact with mucous membranes or nonintact skin). High-level disinfection deactivates all types of microorganisms except bacterial spores and prions. If high-level disinfection is not performed correctly, however, contaminated medical or surgical devices could transmit pathogens to patients. Reusable semicritical items may be processed using manual methods when manua...

Review of Disinfection and Sterilization - Back to the Basics.

In-depth knowledge of disinfection and sterilization is a key component of infection control. Sterilization completely removes a spore, whereas disinfection cannot. Disinfectants are classified as oxidants and non-oxidants. The decision regarding which method to apply is based on Spaulding's classification. In this article, disinfection and sterilization are thoroughly reviewed, and extensive information from basic to practical points is discussed.

Povidone-iodine versus the benzethonium chloride wipe for penile skin disinfection before semen collection from sperm donors.

To study the influence of povidone-iodine (PI) versus that of the benzethonium chloride wipe (BCW) on semen collection and semen quality of sperm donors undergoing penile skin disinfection and provide some evidence for the selection of disinfection methods for semen collection.

Evaluation of the antibacterial efficacy of various root canal disinfection methods against Enterococcus faecalis biofilm. An ex-vivo study.

Complete elimination of bacteria and their by-products from the root canal system is very difficult with current techniques. The purpose of this study was to compare the antibacterial efficacy of different disinfection protocols against Enterococcus faecalis (E. faecalis) biofilms.

The in vitro examination of the effectiveness of antiseptic substances for a surface disinfection of teeth inoculated with Escherichia coli.

The aim of the study was to assess the possibility of penetration of Escherichia coli bacteria into the dentinal tubules of the samples and determine the antimicrobial efficacy after 5 and 20 min exposition of 3% HO (groups I and II) and 1 and 5 min exposition of 3% NaOCl (groups III and IV) for surface disinfection of bovine teeth. The samples were subjected to inoculation with E. coli suspension. The quality of disinfection was assessed with the three methods. The surface disinfection of samples proved to...

Visible-Light-Driven Catalytic Disinfection of Staphylococcus aureus Using Sandwich Structure g-C3N4/ZnO/Stellerite Hybrid Photocatalyst.

A novel g-C3N4/ZnO/stellerite (CNZOS) hybrid photocatalyst, which was synthesized by coupled hydro thermal-thermal polymerization processing, was applied as an efficient visiblelight- driven photocatalyst against (S. aureus). The optimum synthesized hybrid photocatalyst showed a sandwich structure morphology with layered g-C₃N₄ (doping amount: 40 wt%) deposited onto micron-sized ZnO/stellerite particles (ZnO average diameter: ~18 nm). It had a narrowing band gap (2.48 eV) and enlarged specific surface a...

Improvement of indoor air quality in pet shop using gaseous chlorine dioxide.

Many studies have shown that pet shops have a high concentration of bioaerosols. Thus, effective disinfection protocols are essential to protect the pet shop staff and visitors to the store. The present study examines the effectiveness of gaseous chlorine dioxide (ClO) fogging in minimizing the residual bacteria and fungi levels in a typical pet shop in Taiwan consisting of a commodity area, a lodging area, and a grooming area. This investigation uses three disinfection modes (DMs) according to different di...

Rotating packed bed as a novel disinfection contactor for the inactivation of E. coli by ozone.

The intensification of mass transfer and mixing in ozone-based disinfection processes is very important in order to achieve a certain disinfection effect at a reasonable cost. This study employed rotating packed bed (RPB), an efficient process intensification device, as an ozone-disinfection contactor, and its performance on disinfection and mass transfer was evaluated by the inactivation of Escherichia coli (E. coli) and mass transfer coefficient (ka). The ozone exposure (Ct value) and the log inactivatio...

Electrochemical oxidation for stormwater disinfection: How does real stormwater chemistry impact on pathogen removal and disinfection by-products level?

Preliminary laboratory work has shown that electrochemical oxidation (ECO) is a promising technology for disinfection of harvested stormwater. This paper focuses on understanding how stormwater chemistry (e.g. pH, chloride, bicarbonate, ammonia and total organic carbon - that can vary substantially between sites) impacts the disinfection performance of ECO. Real stormwater samples from four different urban catchments were collected and tested for ECO performance in disinfecting stormwater pathogens using a ...

A critical review of protocols for conventional microwave oven use for denture disinfection.

The lack of proper denture hygiene may cause denture stomatitis and be detrimental to older adults' health. The cleaning of complete dentures should be quick, efficient, and easy to perform, although it might not guarantee disinfection. The use of a microwave oven has been suggested for aiding in the disinfection of complete dentures, but lacks a gold standard protocol.

Synergy of MS2 disinfection by sequential exposure to tailored UV wavelengths.

The advantages of polychromatic ultraviolet (UV) light for viral disinfection can be optimized for disinfection using emerging tailored wavelength sources including KrCl excimer lamps and light emitting diodes (LEDs). Disinfection of the common viral surrogate MS2 bacteriophage was measured after exposure to these emerging sources and conventional low pressure (LP) mercury UV lamps in individual or sequential exposures. The first dose response for any virus (MS2) exposed to a KrCl excimer lamp is reported, ...

UV-C decontamination of hand-held tablet devices in the healthcare environment using the Codonics D6000™ disinfection system.

Mobile phones and tablet computers may be contaminated with microorganisms and become a potential reservoir for cross-transmission of pathogens between healthcare workers and patients. There is no generally accepted guidance how to reduce contamination on mobile devices in healthcare settings. Our aim was to determine the efficacy of the Codonics D6000™ UV-C disinfection device. Daily disinfection reduced contamination on screens and on protective cases (test) significantly, but not all cases (control) co...

Boron- and phenyl-codoped graphitic carbon nitride with greatly enhanced light responsive range for photocatalytic disinfection.

The development of metal-free photocatalyst to make maximum use of the solar energy for photocatalytic disinfection is highly desired. Herein, boron-and phenyl-codoped graphitic carbon nitride was prepared by thermal polycondensation of cyanamide with 3-aminobenzeneboronic acid and applied as photocatalyst to inactivate Escherichia coli (E. coli). The photocatalysts exhibited the enhanced light responsive range over ultraviolet to near infrared light and 99.9% bacteria could be inactivated within 3 h with...

Enhanced Antibiotic Resistant Bacteria Removal from Wastewater Treatment Plant by Different Disinfection Technologies.

Based on the removal of total heterotrophic bacteria (HPC) and antibiotic resistant bacteria (ARB), including the ampicillin resistant bacteria (AMP), erythromycin resistant bacteria (ERY), tetracycline resistant bacteria (TET), kanamycin resistant bacteria (KAN), and ciprofloxacin resistant bacteria (CIP), this study investigates the enhanced removal performance of ARB by different disinfection technologies. The experimental results showed that ARB removal by ultraviolet (UV) disinfection from the wastewat...

Effect of pulsed xenon ultraviolet room disinfection devices on microbial counts for methicillin-resistant Staphylococcus aureus and aerobic bacterial colonies.

Inadequate environmental disinfection represents a serious risk for health care-associated infections. Technologic advancements in disinfection practices, including no-touch devices, offer significant promise to improve infection control. We evaluated one such device, portable pulsed xenon ultraviolet (PX-UV) units, on microbial burden during an implementation trial across 4 Veterans Affairs hospitals.

Formation kinetics of disinfection byproducts in algal-laden water during chlorination: A new insight into evaluating disinfection formation risk.

It is necessary and important to investigate the formation of disinfection byproducts (DBPs) in water treatment systems for the management of disinfection formation risk. In the present study, the formation potential of trichloromethane (TCM) and haloacetic acids in different algal metabolites were compared, and the formation kinetics of these DBPs were investigated. The results indicated that DBP formation potential, the traditional index widely used to evaluate the disinfection formation risk, can represe...

Can CabECO technology be used for the disinfection of highly faecal-polluted surface water?

In this work, the disinfection of highly faecal-polluted surface water was studied using a new electrochemical cell (CabECO cell, manufactured by CONDIAS) specifically designed to produce ozone in water with very low conductivity. The disinfection tests were carried out in a discontinuous mode to evaluate the influence of the electrode current charge passed. The effect of the current density was also studied in order to optimize the disinfection conditions and to simultaneously prevent the formation of unde...

A comprehensive review on the use of second generation TiO photocatalysts: Microorganism inactivation.

Photocatalytic disinfection practices have been applied for decades and attract current interest along with the developments in synthesis of novel photocatalysts. A survey based investigation was performed for elucidation of photocatalytic treatment details as well as disinfection mechanism of microorganisms. The present work brings significant information on the utilization of second generation TiO photocatalysts for inactivation of microorganisms typically using E. coli as the model microorganism. Specia...

An international survey of cleaning and disinfection practices in the healthcare environment.

Antimicrobial resistance has become an urgent global health priority. Basic hygiene practices and cleaning and disinfection of the hospital environment are key in preventing pathogen cross-transmission.

Importance of cleaning and disinfection of critical surfaces in dental health services. Impact of an intervention program.

Introduction Dental care has become a challenge for healthcare associated infection prevention programs, since the environment, within other factors, plays an important role in the transmission chain. Materials and Methods An intervention program was designed for the Dental Unit of Hospital Militar de Santiago, between years 2014 and 2015. The program contemplated 3 stages: diagnostic, intervention and evaluation stage. Objective To improve the safety of critical surfaces involved in dental healthcare. Resu...

Applicability of integrated cell culture reverse transcriptase quantitative PCR (ICC-RTqPCR) for the simultaneous detection of the four human enteric enterovirus species in disinfection studies.

A newly developed integrated cell culture reverse transcriptase quantitative PCR (ICC-RTqPCR) method and its applicability in UV disinfection studies is described. This method utilizes a cell culture system coupled with four RTqPCR assays to detect four species of human enterovirus (e.g., Enterovirus A, Enterovirus B, Enterovirus C and Enterovirus D). Evaluation of the RTqPCR assays was conducted with coxsackievirus A10, echovirus 30, poliovirus 1 and enterovirus 70 and resulted in 100% specificity for the ...

Particle assisted removal of microbes from surfaces.

Increased reliance on kill based approaches for disinfection raises concerns of antimicrobial resistance development and has significantly elevated the need for alternate approaches for skin and substrate disinfection. This study focuses on reducing harmful microbes from substrates primarily via removal and to a lesser extent by kill.

Drinking water disinfection byproducts and risk of orofacial clefts in the National Birth Defects Prevention Study.

Maternal exposure to drinking water disinfection byproducts (DBP)s may contribute to orofacial cleft (OFC) development, but studies are sparse and beset with limitations.

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