keyword
MENU ▼
Read by QxMD icon Read
search

Organ pipes

keyword
https://www.readbyqxmd.com/read/28978350/interactive-effects-of-temperature-organic-carbon-and-pipe-material-on-microbiota-composition-and-legionella-pneumophila-in-hot-water-plumbing-systems
#1
Caitlin R Proctor, Dongjuan Dai, Marc A Edwards, Amy Pruden
BACKGROUND: Several biotic and abiotic factors have been reported to influence the proliferation of microbes, including Legionella pneumophila, in hot water premise plumbing systems, but their combined effects have not been systematically evaluated. Here, we utilize simulated household water heaters to examine the effects of stepwise increases in temperature (32-53 °C), pipe material (copper vs. cross-linked polyethylene (PEX)), and influent assimilable organic carbon (0-700 μg/L) on opportunistic pathogen gene copy numbers and the microbiota composition, as determined by quantitative polymerase chain reaction and 16S rRNA gene amplicon sequencing...
October 4, 2017: Microbiome
https://www.readbyqxmd.com/read/28974829/the-influence-of-smoking-on-the-variations-in-carboxyhemoglobin-and-methemoglobin-during-urologic-surgery
#2
Aleksandra Gavrilovska-Brzanov, Mirjana Shosholcheva, Biljana Kuzmanovska, Andrijan Kartalov, Maja Mojsova-Mijovska, Marija Jovanovski-Srceva, Gordana Taleska, Nikola Brzanov, Risto Simeonov, Maja Slaninka Miceska
INTRODUCTION: Surgery is supposed to modulate the production of carbon monoxide by the reduction of heme oxygenase activity or transcriptional regulation of inducible heme oxygenase. On the other hand, the inhalation of tobacco smoke can substantially raise the level of carboxyhemoglobin in the blood. Furthermore, methemoglobin is maintained at a constant level. However, excessive production of methemoglobin relative to total methemoglobin reductase activity results in methemoglobin increase...
June 2017: Medical Archives
https://www.readbyqxmd.com/read/28974043/multi-elements-in-source-water-drinking-and-surface-water-within-five-cities-from-the-semi-arid-and-arid-region-nw-china-occurrence-spatial-distribution-and-risk-assessment
#3
Ting Wu, Xiaoping Li, Tao Yang, Xuemeng Sun, Howard W Mielke, Yue Cai, Yuwei Ai, Yanan Zhao, Dongying Liu, Xu Zhang, Xiaoyun Li, Lijun Wang, Hongtao Yu
The purpose of this study was to identify the concentration of multi-elements (MEs) in source water (surface and drinking water) and assess their quality for sustainability. A total of 161 water samples including 88 tap drinking waters (DW) and 73 surface waters (SW) were collected from five cities in Xi'an, Yan'an, Xining, Lanzhou, and Urumqi in northwestern China. Eighteen parameters including pH, electrical conductivity (EC), total organic carbon (TOC) total nitrogen (TN), chemical compositions of anions (F(-), Cl(-), NO₃(-),HCO₃(-), SO₄(2-)), cations (NH₄⁺, K⁺, Na⁺, Ca(2+),Mg(2+)), and metals (lead (Pb), chromium (Cr), cadmium (Cd), copper (Cu)) were analyzed in the first time at the five cities ...
October 2, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28961439/chemical-characterization-and-safety-assessment-of-dokha-an-emerging-alternative-tobacco-product
#4
Yehya Elsayed, Sarah Dalibalta, Maissam El Kouche
Dokha is known to be one of the most rapidly spreading alternative tobacco products (ATPs) in the Middle East and North Africa (MENA) region. It is smoked using a pipe known as Midwakh. There is no scientific research published on the chemical composition of dokha and only very little was done to investigate its impact on human health. Three different types of dokha were included in this study. The trace metals content in the dokha samples were analyzed using inductively-coupled plasma-optical emission spectroscopy and energy-dispersive X-ray spectroscopy-scanning electron microscope...
September 26, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28929027/the-role-of-polycarbonate-monomer-bisphenol-a-in-insulin-resistance
#5
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/28869912/well-organized-migration-of-electrons-for-enhanced-hydrogen-evolution-integration-of-2d-mos2-nanosheets-with-plasmonic-photocatalyst-by-a-facile-ultrasonic-chemical-method
#6
Wenwen Liu, Bo Liang, Yongjin Ma, Yi Liu, Anquan Zhu, Pengfei Tan, Xiang Xiong, Jun Pan
The construction of a plasmonic photocatalyst is an efficient way to suppress detrimental electrons-holes recombination and extend the spectral range of light absorption in semiconductors. However, the facilitation effect in the aspect of electrons-holes separation is great limited as the lack of a driving force compelled the electrons or holes migration to surface catalytic sites makes them flow randomly in semiconductors. In this work, we confirm that the integration of MoS2 nanosheets formed two dimensional (2D) layered heterojunction with C3N4 with Au-C3N4 plasmonic photocatalyst can further enhance electrons-holes separation through the formation of Au-C3N4-MoS2 nanostructure by a facile ultrasonic chemical method...
August 30, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28841184/experimental-investigation-on-surface-quality-processed-by-self-excited-oscillation-pulsed-waterjet-peening
#7
Xiaolong Ding, Yong Kang, Deng Li, Xiaochuan Wang, Dongping Zeng
High-speed waterjet peening technology has attracted a lot of interest and is now being widely studied due to its great ability to strengthen metal surfaces. In order to further improve the mechanical properties of metals, self-excited oscillation pulsed waterjets (SOPWs) were used for surface peening with an experimental investigation focused on the surface topography and properties. By impinging the aluminum alloy (5052) specimens with SOPWs issuing from an organ-pipe oscillation nozzle, the hardness and roughness at various inlet pressures and stand-off distances were measured and analyzed, as well as the residual stress...
August 25, 2017: Materials
https://www.readbyqxmd.com/read/28771996/microbial-biotechnology-approaches-to-mitigating-the-deterioration-of-construction-and-heritage-materials
#8
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...
September 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/28758736/vapor-liquid-sol-gel-approach-to-fabricating-highly-durable-and-robust-superhydrophobic-polydimethylsiloxane-silica-surface-on-polyester-textile-for-oil-water-separation
#9
Xiaojing Su, Hongqiang Li, Xuejun Lai, Lin Zhang, Jing Wang, Xiaofeng Liao, Xingrong Zeng
Large-scale fabrication of superhydrophobic surfaces with excellent durability by simple techniques has been of considerable interest for its urgent practical application in oil-water separation in recent years. Herein, we proposed a facile vapor-liquid sol-gel approach to fabricating highly durable and robust superhydrophobic polydimethylsiloxane@silica surfaces on the cross-structure polyester textiles. Scanning electron microscopy and Fourier transform infrared spectroscopy demonstrated that the silica generated from the hydrolysis-condensation of tetraethyl orthosilicate (TEOS) gradually aggregated at microscale driven by the extreme nonpolar dihydroxyl-terminated polydimethylsiloxane (PDMS(OH))...
August 11, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28758735/electrochemical-approach-for-effective-antifouling-and-antimicrobial-surfaces
#10
Sheng Long Gaw, Sujoy Sarkar, Sivan Nir, Yafit Schnell, Daniel Mandler, Zhichuan J Xu, Pooi See Lee, Meital Reches
Biofouling, the adsorption of organisms to a surface, is a major problem today in many areas of our lives. This includes: (i) health, as biofouling on medical device leads to hospital-acquired infections, (ii) water, since the accumulation of organisms on membranes and pipes in desalination systems harms the function of the system, and (iii) energy, due to the heavy load of the organic layer that accumulates on marine vessels and causes a larger consumption of fuel. This paper presents an effective electrochemical approach for generating antifouling and antimicrobial surfaces...
August 9, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28746531/effective-tobacco-control-measures-agreement-among-medical-students
#11
Stella Regina Martins, Renato Batista Paceli, Marco Antônio Bussacos, Frederico Leon Arrabal Fernandes, Gustavo Faibischew Prado, Elisa Maria Siqueira Lombardi, Mário Terra-Filho, Ubiratan Paula Santos
Objective: To determine the level of agreement with effective tobacco control measures recommended by the World Health Organization and to assess the attitudes toward, knowledge of, and beliefs regarding smoking among third-year medical students at University of São Paulo School of Medicine, located in the city of São Paulo, Brazil. Methods: Between 2008 and 2012, all third-year medical students were invited to complete a self-administered questionnaire based on the Global Health Professionals Student Survey and its additional modules...
May 2017: Jornal Brasileiro de Pneumologia: Publicaça̋o Oficial da Sociedade Brasileira de Pneumologia e Tisilogia
https://www.readbyqxmd.com/read/28743326/a-review-of-surfactant-role-in-soil-clogging-processes-at-wastewater-exfiltration-locations-in-sewers
#12
REVIEW
Mitra Nikpay, Peter Krebs, Bryan Ellis
  Wastewater contains significant sources of pollutants and contaminants. often the failure of a pipe, inadequate sealing or corrupt pipe-connections cause the loss of raw sewage, which percolates into the nearby soil. As a consequence, a colmation layer in conjunction with soil clogging is developing, which regulates the exfiltration rate. Recently, literature has emerged that offers findings about the effects of wastewater surfactants on the change of physical properties of the soil. A survey of published literature in this field provides information highlighting the influential mechanisms of surfactants in soil clogging through physical, chemical and biological processes...
August 1, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28708616/monitoring-accumulation-sediment-characteristics-in-full-scale-sewer-physical-model-with-urban-wastewater
#13
Manuel Regueiro-Picallo, Juan Naves, Jose Anta, Joaquín Suárez, Jerónimo Puertas
A series of experiments were carried out with real wastewater in a pilot flume located at A Coruña wastewater treatment plant (WWTP) (Spain). A full scale model was developed to test a circular (300 mm inner diameter) and an equivalent area egg-shaped plastic pipe under controlled experimental conditions (pipe slope 2-5‰, averaged discharge Q = 4 L/s). Velocity profiles and sediment accumulation in the pipe invert was daily measured. Within the 7-11 days, the average sediment accumulation rate found in the circular pipe was between 1...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28668756/crude-oil-contamination-of-plastic-and-copper-drinking-water-pipes
#14
Xiangning Huang, Stephane Andry, Jessica Yaputri, Devin Kelly, David A Ladner, Andrew J Whelton
This study was conducted to determine the susceptibility of plastic (i.e., PEX, HDPE and CPVC) and copper pipes to short-term contamination by crude oil. Pipes were exposed to highly and slightly contaminated drinking water for the typical duration of Do Not Use drinking water orders. PEX pipes sorbed and desorbed the greatest amount of monoaromatic hydrocarbons (MAHs), whereas copper pipes were less susceptible to contamination. For benzene, toluene, ethylbenzene, and xylenes (BTEX) quantified in water, only benzene exceeded its health based maximum contaminant level (MCL)...
June 17, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28659529/combined-ultrafiltration-electrodeionization-technique-for-production-of-high-purity-water
#15
Anita Kusuma Wardani, Ahmad Nurul Hakim, Khoiruddin, I Gede Wenten
Electrodeionization (EDI) is the most common method to produce high purity water used for boiler feed water, microelectronic, and pharmaceutical industries. Commonly, EDI is combined with reverse osmosis (RO) to meet the requirement of EDI feed water, with hardness less than 1 ppm. However, RO requires a relatively high operating pressure and ultrafiltration (UF) as pretreatment which results in high energy consumption and high complexity in piping and instrumentation. In this work, UF was used as the sole pretreatment of EDI to produce high purity water...
June 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28616178/population-differences-in-host-plant-preference-and-the-importance-of-yeast-and-plant-substrate-to-volatile-composition
#16
Priya Date, Amber Crowley-Gall, Aaron F Diefendorf, Stephanie M Rollmann
Divergent selection between environments can result in changes to the behavior of an organism. In many insects, volatile compounds are a primary means by which host plants are recognized and shifts in plant availability can result in changes to host preference. Both the plant substrate and microorganisms can influence this behavior, and host plant choice can have an impact on the performance of the organism. In Drosophila mojavensis, four geographically isolated populations each use different cacti as feeding and oviposition substrates and identify those cacti by the composition of the volatile odorants emitted...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28571022/therapeutic-use-exemptions
#17
David Gerrard, Andrew Pipe
The introduction, in 2004, of the World Anti-Doping Code and a standardized "prohibited list" of substances and methods proscribed in sport represented a consistent, international response to the escalating challenge of drug misuse in contemporary sport. Simultaneously, it was recognized that athletes experiencing illness or injury might legitimately require the use of "prohibited" medications or procedures, and the concept of the "therapeutic use exemption" (TUE) was introduced. The mechanisms of the TUE process are carefully defined and described in a specific WADA "international standard" (IS)...
2017: Medicine and Sport Science
https://www.readbyqxmd.com/read/28513143/interactive-effects-of-corrosion-copper-and-chloramines-on-legionella-and-mycobacteria-in-hot-water-plumbing
#18
William J Rhoads, Amy Pruden, Marc A Edwards
Complexities associated with drinking water plumbing systems can result in undesirable interactions among plumbing components that undermine engineering controls for opportunistic pathogens (OPs). In this study, we examine the effects of plumbing system materials and two commonly applied disinfectants, copper and chloramines, on water chemistry and the growth of Legionella and mycobacteria across a transect of bench- and pilot-scale hot water experiments carried out with the same municipal water supply. We discovered that copper released from corrosion of plumbing materials can initiate evolution of >1100 times more hydrogen (H2) from water heater sacrificial anode rods than does presence of copper dosed as soluble cupric ions...
June 1, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28502052/variation-of-microbial-communities-and-functional-genes-during-the-biofilm-formation-in-raw-water-distribution-systems-and-associated-effects-on-the-transformation-of-nitrogen-pollutants
#19
Wei Chen, Yanmei Gu, Hang Xu, Zhigang Liu, Chunhui Lu, Chenshuo Lin
This study aimed to investigate the variation of microbial communities and functional genes during the biofilm formation in raw water distribution systems without prechlorination and associated effects on the transformation of nitrogen pollutants by using a designed model pipe system. The results showed the transformation of nitrogen pollutants was obvious during the biofilm formation. The richness and diversity of the microbial communities changed significantly. The higher abundance of Nitrospirae in biofilm samples significantly contributed to biological nitrification...
May 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28498127/accelerated-anaerobic-release-of-k-mg-and-p-from-surplus-activated-sludge-for-element-recovery-and-struvite-formation-inhibition
#20
A Ito, H Kawakami, N Ishikawa, M Ito, T Oikawa, A Sato, T Umita
Accelerated release of potassium (K), magnesium (Mg) and phosphorus (P) from surplus activated sludge (SAS) was investigated to develop a new system for the recovery of the elements. Anaerobic cultivation of SAS during 24 h released 78% of K and about 50% of Mg and P from SAS more effectively compared to aerobic cultivation (K: 40%, Mg: 15%, P: 15%). Furthermore, the addition of sodium acetate as an organic carbon source remarkably accelerated the release of K, Mg and P from SAS under anaerobic condition. However, no increase in the maximum release efficiencies was observed...
May 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
keyword
keyword
20866
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"