نتایج جستجو برای: booster chlorination

تعداد نتایج: 6997  

2013
Kadir Özdemir İsmail Toröz Vedat Uyak

In this study, the changes in UV absorbance of water samples were characterized using defined differential UV spectroscopy (DUV), a novel spectroscopic technique. Chlorination experiments were conducted with water samples from Terkos Lake (TL) and Büyükçekmece Lake (BL) (Istanbul, Turkey). The maximum loss of UV absorbance for chlorinated TL and BL raw water samples was observed at a wavelength...

1998

Most of the 36 billion gal of treated sewage wastewater discharged daily into the environment in the United States is disinfected via chlorination. To minimize toxicity, dechlorination with sulfite or sulfur dioxide is often performed. Although dechlorination is considered instantaneous and complete, several studies have found residual toxicity of chlorinated/dechlorinated effluent to aquatic l...

Journal: :Journal of environmental sciences 2018
Ying Zhang Ning Zhang Peng Zhao Zhiguang Niu

The characteristics of dissolved organic matter (DOM) and bromide ion concentration have a significant influence on the formation of disinfection by-products (DBPs). In order to identify the main DBP precursors, DOM was divided into five fractions based on molecular weight (MW), trihalomethane formation potential and haloacetic acid formation potential were determined for fractions, and the cha...

Journal: :Microbe Magazine 2012

Journal: :iranian journal of parasitology 0
aboelhadid shawky mohamed aboelhadid parasitology department, faculty of veterinary medicine, beni-suef university, beni-suef, egypt. mahmoud amin el-askalany parasitology department, faculty of veterinary medicine, beni-suef university, beni-suef, egypt. wahid mohamed mousa parasitology department, faculty of veterinary medicine, cairo university, cairo, egypt. walid mahmoud arafa parasitology department, faculty of veterinary medicine, beni-suef university, beni-suef, egypt.

background: haemonchus contortus causes severe economic losses in small ru-minants, so this study was conducted to study the uv effect on h. contortus larvae and its protective effect. methods: sixteen male goats were divided into 5 groups, control infected, con-trol uninfected and uv 30minutes exposure; uv 60minutes exposure and uv booster 60minutes exposure. the uv groups were exposed to uv i...

Journal: :environmental health engineering and management 0
mehdi ahmadi environmental technologies research center, department of environmental health engineering, school of public health, ahvaz jundishapur university of medical sciences, ahvaz, iran maedeh rozkhosh science and research branch, islamic azad university of khozestan, faculty of environment, ahvaz, iran nemat-allah jaafarzadeh haghighifard environmental technologies research center, department of environmental health engineering, school of public health, ahvaz jundishapur university of medical sciences, ahvaz, iran

background: iran is located in the seventh rank in terms of co2 emissions resulting from the fuel combustion in the world. gas compressor booster stations, due to the several sources of contaminants, are causing the release of large amounts of co2 and ch4, which will cause climate change therefore, estimating the emissions of the gases from oil and gas, different processing units are necessary....

2016
Wendell C. Taylor Raheem J. Paxton Ross Shegog Sharon P. Coan Allison Dubin Timothy F. Page David M. Rempel

INTRODUCTION The 15-minute work break provides an opportunity to promote health, yet few studies have examined this part of the workday. We studied physical activity and sedentary behavior among office workers and compared the results of the Booster Break program with those of a second intervention and a control group to determine whether the Booster Break program improved physical and behavior...

Journal: :The Pediatric infectious disease journal 2016
Johannes Trück Sena Jawad David Goldblatt Lucy Roalfe Matthew D Snape Merryn Voysey Andrew J Pollard

BACKGROUND Both the 13- and 10-valent pneumococcal conjugate vaccines (PCV-13; PCV-10) are immunogenic and effective against vaccine-type pneumococcal disease when given to young children. However, limited data are available regarding the interchangeability of these 2 vaccines. METHODS UK children (n = 178) who had previously been vaccinated with PCV-13 at 2 and 4 months were randomized to re...

Journal: :Pediatrics 2012
Michelle L Macy Sarah J Clark Gary L Freed Amy T Butchart Dianne C Singer Comilla Sasson William J Meurer Matthew M Davis

OBJECTIVE Booster seat use among school-aged children has been consistently lower than national goals. In this study, we sought to explore associations between parental experiences with booster seats and carpooling. METHODS We conducted a cross-sectional Web-based survey of a nationally representative panel of US parents in January 2010. As part of a larger survey, parents of 4- to 8-year-old...

2012
Giuseppe Ferrera Mario Cuccia Gabriele Mereu Giancarlo Icardi Gianni Bona Susanna Esposito Federico Marchetti Marc Messier Sherine Kuriyakose Karin Hardt

BACKGROUND Pertussis occurs in older children, adolescents and adults due to waning immunity after primary vaccination. Booster vaccination for pre-school children has been recommended in Italy since 1999. In this study (NCT00871000), the immunogenicity, safety and reactogenicity of a booster dose of reduced-antigen content diphtheria-tetanus-acellular pertussis-inactivated poliovirus vaccine (...

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