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https://www.readbyqxmd.com/read/28929027/the-role-of-polycarbonate-monomer-bisphenol-a-in-insulin-resistance
#1
Milos Pjanic
Bisphenol A (BPA) is a synthetic unit of polycarbonate polymers and epoxy resins, the types of plastics that could be found in essentially every human population and incorporated into almost every aspect of the modern human society. BPA polymers appear in a wide range of products, from liquid storages (plastic bottles, can and glass linings, water pipes and tanks) and food storages (plastics wraps and containers), to medical and dental devices. BPA polymers could be hydrolyzed spontaneously or in a photo- or temperature-catalyzed process, providing widespread environmental distribution and chronic exposure to the BPA monomer in contemporary human populations...
2017: PeerJ
https://www.readbyqxmd.com/read/28920053/smoking-and-lung-cancer-a-geo-regional-perspective
#2
REVIEW
Zahraa Rahal, Shaza El Nemr, Ansam Sinjab, Hassan Chami, Arafat Tfayli, Humam Kadara
Lung cancer is the leading cause of cancer-related deaths worldwide. Non-small cell lung cancer (NSCLC) represents the most frequently diagnosed subtype of this morbid malignancy. NSCLC is causally linked to tobacco consumption with more than 500 million smokers worldwide at high risk for this fatal malignancy. We are currently lagging in our knowledge of the early molecular (e.g., genomic) effects of smoking in NSCLC pathogenesis that would constitute ideal markers for early detection. This limitation is further amplified when considering the variable etiologic factors in NSCLC pathogenesis among different regions around the globe...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28913681/calculation-of-intercepted-runoff-depth-based-on-stormwater-quality-and-environmental-capacity-of-receiving-waters-for-initial-stormwater-pollution-management
#3
Hai-Qin Peng, Yan Liu, Xue-Long Gao, Hong-Wu Wang, Yi Chen, Hui-Yi Cai
While point source pollutions have gradually been controlled in recent years, the non-point source pollution problem has become increasingly prominent. The receiving waters are frequently polluted by the initial stormwater from the separate stormwater system and the wastewater from sewage pipes through stormwater pipes. Consequently, calculating the intercepted runoff depth has become a problem that must be resolved immediately for initial stormwater pollution management. The accurate calculation of intercepted runoff depth provides a solid foundation for selecting the appropriate size of intercepting facilities in drainage and interception projects...
September 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28902154/leak-detection-and-location-of-water-pipes-using-vibration-sensors-and-modified-ml-prefilter
#4
Jihoon Choi, Joonho Shin, Choonggeun Song, Suyong Han, Doo Il Park
This paper proposes a new leak detection and location method based on vibration sensors and generalised cross-correlation techniques. Considering the estimation errors of the power spectral densities (PSDs) and the cross-spectral density (CSD), the proposed method employs a modified maximum-likelihood (ML) prefilter with a regularisation factor. We derive a theoretical variance of the time difference estimation error through summation in the discrete-frequency domain, and find the optimal regularisation factor that minimises the theoretical variance in practical water pipe channels...
September 13, 2017: Sensors
https://www.readbyqxmd.com/read/28895003/reduction-of-water-losses-by-rehabilitation-of-water-distribution-network
#5
Mahmud Güngör, Ufuk Yarar, Mahmut Firat
Physical or real losses may be indicated as the most important component of the water losses occurring in a water distribution network (WDN). The objective of this study is to examine the effects of piping material management and network rehabilitation on the physical water losses and water losses management in a WDN. For this aim, the Denizli WDN consisting of very old pipes that have exhausted their economic life is selected as the study area. The fact that the current network is old results in the decrease of pressure strength, increase of failure intensity, and inefficient use of water resources thus leading to the application of the rehabilitation program...
September 11, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28892868/assessing-the-feasibility-of-integrating-ecosystem-based-with-engineered-water-resource-governance-and-management-for-water-security-in-semi-arid-landscapes-a-case-study-in-the-banas-catchment-rajasthan-india
#6
Mark Everard, Om Prakash Sharma, Vinod Kumar Vishwakarma, Dharmendra Khandal, Yogesh K Sahu, Rahul Bhatnagar, Jitendra K Singh, Ritesh Kumar, Asghar Nawab, Amit Kumar, Vivek Kumar, Anil Kashyap, Deep Narayan Pandey, Adrian C Pinder
Much of the developing world and areas of the developed world suffer water vulnerability. Engineering solutions enable technically efficient extraction and diversion of water towards areas of demand but, without rebalancing resource regeneration, can generate multiple adverse ecological and human consequences. The Banas River, Rajasthan (India), has been extensively developed for water diversion, particularly from the Bisalpur Dam from which water is appropriated by powerful urban constituencies dispossessing local people...
September 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28892770/new-model-of-chlorine-wall-reaction-for-simulating-chlorine-concentration-in-drinking-water-distribution-systems
#7
Ian Fisher, George Kastl, Arumugam Sathasivan
Accurate modelling of chlorine concentrations throughout a drinking water system needs sound mathematical descriptions of decay mechanisms in bulk water and at pipe walls. Wall-reaction rates along pipelines in three different systems were calculated from differences between field chlorine profiles and accurately modelled bulk decay. Lined pipes with sufficiently large diameters (>500 mm) and higher chlorine concentrations (>0.5 mg/L) had negligible wall-decay rates, compared with bulk-decay rates. Further downstream, wall-reaction rate consistently increased (peaking around 0...
August 30, 2017: Water Research
https://www.readbyqxmd.com/read/28880257/inverse-association-between-cigarette-and-water-pipe-smoking-and-hypertension-in-an-elderly-population-in-iran-bushehr-elderly-health-programme
#8
M B Mehboudi, I Nabipour, K Vahdat, H Darabi, A Raeisi, N Mehrdad, R Heshmat, G Shafiee, B Larijani, A Ostovar
The collected data in Bushehr Elderly Health (BEH) Program which had detailed the data on participants' smoking status and habits, was analysed to investigate the association between smoking of both water pipes and cigarettes and hypertension in an elderly population. Three thousand elderly men and women who participated in the baseline assessment of the BEH Program-a prospective population-based study being conducted in Bushehr, Iran-were selected randomly through a multistage, stratified cluster sampling method...
September 7, 2017: Journal of Human Hypertension
https://www.readbyqxmd.com/read/28876269/info-gap-robustness-pathway-method-for-transitioning-of-urban-drainage-systems-under-deep-uncertainties
#9
Jonatan Zischg, Mariana L R Goncalves, Taneha Kuzniecow Bacchin, Günther Leonhardt, Maria Viklander, Arjan van Timmeren, Wolfgang Rauch, Robert Sitzenfrei
In the urban water cycle, there are different ways of handling stormwater runoff. Traditional systems mainly rely on underground piped, sometimes named 'gray' infrastructure. New and so-called 'green/blue' ambitions aim for treating and conveying the runoff at the surface. Such concepts are mainly based on ground infiltration and temporal storage. In this work a methodology to create and compare different planning alternatives for stormwater handling on their pathways to a desired system state is presented...
September 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28872628/copper-corrosion-and-biocorrosion-events-in-premise-plumbing
#10
REVIEW
Ignacio T Vargas, Diego A Fischer, Marco A Alsina, Juan P Pavissich, Pablo A Pastén, Gonzalo E Pizarro
Corrosion of copper pipes may release high amounts of copper into the water, exceeding the maximum concentration of copper for drinking water standards. Typically, the events with the highest release of copper into drinking water are related to the presence of biofilms. This article reviews this phenomenon, focusing on copper ingestion and its health impacts, the physicochemical mechanisms and the microbial involvement on copper release, the techniques used to describe and understand this phenomenon, and the hydrodynamic effects...
September 5, 2017: Materials
https://www.readbyqxmd.com/read/28869187/growth-of-legionella-anisa-in-a-model-drinking-water-system-to-evaluate-different-shower-outlets-and-the-impact-of-cast-iron-rust
#11
Wilco van der Lugt, Sjoerd M Euser, Jacob P Bruin, Jeroen W Den Boer, Jimmy T Walker, Sebastian Crespi
Legionella continues to be a problem in water systems. This study investigated the influence of different shower mixer faucets, and the influence of the presence of cast iron rust from a drinking water system on the growth of Legionella. The research is conducted using a model of a household containing four drinking water systems. All four systems, which contained standard plumbing components including copper pipes and a water heater, were filled with unchlorinated drinking water. Furthermore, all systems had three different shower faucets: (A) a stainless-steel faucet, (B) a brass-ceramic faucet, and (C) a brass thermostatic faucet...
August 18, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28842800/reductive-precipitation-and-removal-of-cr-vi-from-groundwaters-by-pipe-flocculation-microfiltration
#12
Stylianos Stylianou, Konstantinos Simeonidis, Manassis Mitrakas, Anastasios Zouboulis, Mathias Ernst, Ioannis A Katsoyiannis
Chromium (Cr(VI)) is a very toxic and carcinogenic element, which is widely present in groundwaters, mainly due to geogenic conditions. The limit of Cr(VI) in drinking water is expected to be reduced to 10 μg/L in both the USA and the European Union. Recent literature findings indicated that the most efficient process in reducing Cr(VI) levels to below 10 μg/L proved to be Cr(VI) reduction by Fe(II), by applying a molar ratio Fe(II)/Cr(VI) of around 9. In the present work, we investigated the reduction of Cr(VI) by Fe(II) in pipe flocculation reactors followed by filtration of insoluble products by microfiltration...
August 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28829737/hygienic-behaviors-and-risks-for-ascariasis-among-college-students-in-kabul-afghanistan
#13
Mohammad Yousuf Mubarak, Abram L Wagner, Bradley F Carlson, Matthew L Boulton
Teenagers have a high prevalence of ascariasis in low-income countries with endemic disease, and their hygienic behaviors and access to proper sanitation may be limited in rapidly urbanizing settings. We studied university students in Kabul to estimate the proportion with ascariasis and determine the prevalence of risk factors for infection. Ascariasis was assessed through microscopy for 520 students attending Kabul Medical University. Overall, 15.8% of students were infected. Living in a hostel (21.2% versus 10...
August 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28829724/prevalence-age-profile-and-associated-risk-factors-for-hymenolepis-nana-infection-in-a-large-population-based-study-in-northern-peru
#14
COMPARATIVE STUDY
Percy M Vilchez Barreto, Ricardo Gamboa, Saul Santivañez, Seth E O'Neal, Claudio Muro, Andrés G Lescano, Luz-Maria Moyano, Guillermo Gonzálvez, Hector H García, For The Cysticercosis Working Group In Perú Cwgp
Hymenolepis nana, the dwarf tapeworm, is a common intestinal infection of children worldwide. We evaluated infection and risk factor data that were previously collected from 14,761 children aged 2-15 years during a large-scale program in northern Peru. We found that 1,124 of 14,761 children (7.61%) had H. nana infection, a likely underestimate given that only a single stool sample was examined by microscopy for diagnosis. The strongest association with infection was lack of adequate water (adjusted prevalence ratio [aPR] 2...
August 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28807621/antitoxin-therapy-of-natural-avian-botulism-outbreaks-occurred-in-brazil
#15
Rodrigo O S Silva, Sandra Y M Gómez, Lilian B Medeiros, Marcus V R Marques, Aila S G Silva, Elisabeth N Mureb, Carlos A Oliveira Junior, Samantha M Favoretto, Francisco C F Lobato, Nelson R S Martins
Botulism commonly affects water birds and it has recently been observed to be emerging in poultry production. In the present work, outbreaks of botulism in wild native species, such as the black-fronted Piping-guan (Aburria jacutinga), wild duck (Cairina moschata) and its crosses with mallard (Anas platyrhynchos), and domestic chickens (Gallus gallus domesticus) are described. Following treatments with a commercial botulism antitoxin CD, 28 (96.5%) out of 29 animals fully recovered after 24-72 h. The antitoxin therapy was shown to be a useful option for the treatment of affected birds, including those that were severely affected...
August 12, 2017: Anaerobe
https://www.readbyqxmd.com/read/28793024/socioenvironmental-conditions-and-intestinal-parasitic-infections-in-brazilian-urban-slums-a-cross-sectional-study
#16
Caroline Ferraz Ignacio, Milena Enderson Chagas da Silva, Natasha Berendonk Handam, Maria de Fatima Leal Alencar, Adriana Sotero-Martins, Martha Macedo de Lima Barata, Antonio Henrique Almeida de Moraes
Methods: A cross-sectional study covering an agglomeration of urban slums was conducted between 2015 and 2016 using participants observation, a socioeconomic survey, and the spontaneous sedimentation method with three slides per sample to analyze fresh stool specimens ( n =595) searching for intestinal parasites. Results: Endolimax nana ( n =95, 16.0%) and Entamoeba coli ( n =65, 10.9%) were the most frequently identified agents, followed by Giardia intestinalis ( n =24, 4...
August 7, 2017: Revista do Instituto de Medicina Tropical de São Paulo
https://www.readbyqxmd.com/read/28783497/incorporating-model-uncertainty-into-the-evaluation-of-interventions-to-reduce-microcontaminant-loads-in-rivers
#17
P Gimeno, R Marcé, Ll Bosch, J Comas, Ll Corominas
Models of microcontaminant fate and transport in wastewater treatment plants (WWTPs) and rivers have been developed and used to assist decision-making in the field of water management. These models come with parameter uncertainties that must be properly incorporated in the decision-making process. The main goal of this study is to evaluate how the magnitudes of key model parameter uncertainties influence the selection of end-of-pipe interventions (at WWTPs) designed to reduce the microcontaminant loads in rivers...
July 17, 2017: Water Research
https://www.readbyqxmd.com/read/28780359/change-regularity-of-water-quality-parameters-in-leakage-flow-conditions-and-their-relationship-with-iron-release
#18
Jingqing Liu, Huabin Shentu, Huanyu Chen, Ping Ye, Bing Xu, Yifu Zhang, Hamid Bastani, Hongxi Peng, Lei Chen, Tuqiao Zhang
The long-term stagnation in metal water supply pipes, usually caused by intermittent consumption patterns, will cause significant iron release and water quality deterioration, especially at the terminus of pipelines. Another common phenomenon at the terminus of pipelines is leakage, which is considered helpful by allowing seepage of low-quality drinking water resulting from long-term stagnation. In this study, the effect of laminar flow on alleviating water quality deterioration under different leakage conditions was investigated, and the potential thresholds of the flow rate, which can affect the iron release process, were discussed...
July 16, 2017: Water Research
https://www.readbyqxmd.com/read/28771996/microbial-biotechnology-approaches-to-mitigating-the-deterioration-of-construction-and-heritage-materials
#19
Pilar Junier, Edith Joseph
Microorganisms are the main engines of elemental cycling in this planet and therefore have a profound impact on both organic and mineral substrates. As such, past and present human-made structures and cultural heritage can be negatively affected by microbial activity. Processes such as bioweathering (rocks and minerals), biodeterioration (organic substrates) or biocorrosion (metals) participate to the degradation or structural damage of construction and heritage materials. This structural damage can cause major economic losses (e...
August 3, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28768518/water-sanitation-and-hygiene-infrastructure-and-quality-in-rural-healthcare-facilities-in-rwanda
#20
Alexandra Huttinger, Robert Dreibelbis, Felix Kayigamba, Fidel Ngabo, Leodomir Mfura, Brittney Merryweather, Amelie Cardon, Christine Moe
BACKGROUND: WHO and UNICEF have proposed an action plan to achieve universal water, sanitation and hygiene (WASH) coverage in healthcare facilities (HCFs) by 2030. The WASH targets and indicators for HCFs include: an improved water source on the premises accessible to all users, basic sanitation facilities, a hand washing facility with soap and water at all sanitation facilities and patient care areas. To establish viable targets for WASH in HCFs, investigation beyond 'access' is needed to address the state of WASH infrastructure and service provision...
August 3, 2017: BMC Health Services Research
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