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https://www.readbyqxmd.com/read/28153294/attenuated-total-reflectance-fourier-transform-infrared-spectroscopy-for-determination-of-long-chain-free-fatty-acid-concentration-in-oily-wastewater-using-the-double-wavenumber-extrapolation-technique
#1
Zisu Hao, Divya Malyala, Lisa Dean, Joel Ducoste
Long Chain Free Fatty Acids (LCFFAs) from the hydrolysis of fat, oil and grease (FOG) are major components in the formation of insoluble saponified solids known as FOG deposits that accumulate in sewer pipes and lead to sanitary sewer overflows (SSOs). A Double Wavenumber Extrapolative Technique (DWET) was developed to simultaneously measure LCFFAs and FOG concentrations in oily wastewater suspensions. This method is based on the analysis of the Attenuated Total Reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) spectrum, in which the absorbance of carboxyl bond (1710cm(-1)) and triglyceride bond (1745cm(-1)) were selected as the characteristic wavenumbers for total LCFFAs and FOG, respectively...
April 1, 2017: Talanta
https://www.readbyqxmd.com/read/28126285/particulate-matter-pollution-over-china-and-the-effects-of-control-policies
#2
REVIEW
Jiandong Wang, Bin Zhao, Shuxiao Wang, Fumo Yang, Jia Xing, Lidia Morawska, Aijun Ding, Markku Kulmala, Veli-Matti Kerminen, Joni Kujansuu, Zifa Wang, Dian Ding, Xiaoye Zhang, Huanbo Wang, Mi Tian, Tuukka Petäjä, Jingkun Jiang, Jiming Hao
China is one of the regions with highest PM2.5 concentration in the world. In this study, we review the spatio-temporal distribution of PM2.5 mass concentration and components in China and the effect of control measures on PM2.5 concentrations. Annual averaged PM2.5 concentrations in Central-Eastern China reached over 100μgm(-3), in some regions even over 150μgm(-3). In 2013, only 4.1% of the cities attained the annual average standard of 35μgm(-3). Aitken mode particles tend to dominate the total particle number concentration...
January 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28125625/on-the-identification-of-associations-between-five-world-health-organization-water-sanitation-and-hygiene-phenotypes-and-six-predictors-in-low-and-middle-income-countries
#3
Hugh Ellis, Erica Schoenberger
BACKGROUND: According to the most recent estimates, 842,000 deaths in low- to middle-income countries were attributable to inadequate water, sanitation and hygiene in 2012. Despite billions of dollars and decades of effort, we still lack a sound understanding of which kinds of WASH interventions are most effective in improving public health outcomes, and an important corollary-whether the right things are being measured. The World Health Organization (WHO) has made a concerted effort to compile comprehensive data on drinking water quality and sanitation in the developing world...
2017: PloS One
https://www.readbyqxmd.com/read/28117002/b3-adrenoceptor-control-of-lower-gen%C3%A4-tour%C3%A4-nary-tract-organs-and-funct%C3%A4-on-in-male-an-overv%C3%A4-ew
#4
Ecem Kaya, Suresh C Sikka, Didem Yilmaz Oral, Isil Ozakca, Serap Gur
BACKGROUND: The sympathetic nervous system is one component of the nervous regulatory system of the physiological function of the lower genitourinary tract. Our knowledge on the role of this sympathetic system has advanced during the last decade due to the characterization of b3-adrenoceptors (b3-ARs) in the urogenital system. OBJECTIVE: This review focuses on the pharmacological and molecular evidence supporting the functional roles of β3-AR in male genitourinary tissues of various species...
January 20, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/28116058/effects-of-temperature-on-transcriptome-and-cuticular-hydrocarbon-expression-in-ecologically-differentiated-populations-of-desert-drosophila
#5
William J Etges, Cássia C de Oliveira, Subhash Rajpurohit, Allen G Gibbs
We assessed the effects of temperature differences on gene expression using whole-transcriptome microarrays and cuticular hydrocarbon variation in populations of cactophilic Drosophila mojavensis. Four populations from Baja California and mainland Mexico and Arizona were each reared on two different host cacti, reared to sexual maturity on laboratory media, and adults were exposed for 12 hr to 15, 25, or 35°C. Temperature differences influenced the expression of 3,294 genes, while population differences and host plants affected >2,400 each in adult flies...
January 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28110150/enhanced-degradation-of-iopamidol-by-peroxymonosulfate-catalyzed-by-two-pipe-corrosion-products-cuo-and-%C3%AE-mno2
#6
Jun Hu, Huiyu Dong, Jiuhui Qu, Zhimin Qiang
Peroxymonosulfate (PMS) is a promising alternative for drinking water disinfection; also many organic micropollutants may be present in drinking water sources nowadays. However, pipe corrosion products (PCPs) may impact the reactions between a disinfectant and organic micropollutants in water distribution systems. This study investigated iopamidol (IPM) degradation by PMS under catalysis of two PCPs (i.e., CuO and δ-MnO2). The pseudo-first-order rate constant of IPM degradation in the CuO/PMS system (CuPS) was 3...
January 16, 2017: Water Research
https://www.readbyqxmd.com/read/28095993/evaluation-of-the-short-term-fate-and-transport-of-chemicals-of-emerging-concern-during-soil-aquifer-treatment-using-select-transformation-products-as-intrinsic-redox-sensitive-tracers
#7
Meriam Muntau, Manoj Schulz, Kevin S Jewell, Nina Hermes, Uwe Hübner, Thomas Ternes, Jörg E Drewes
In this study, known products from oxic transformation of the X-ray contrast medium iopromide were introduced for the first time as intrinsic tracer for in situ characterization of the transition zone between oxic and suboxic conditions during the initial phase of soil-aquifer treatment (SAT). Two wet-dry cycles of a full-scale infiltration basin were monitored to characterize hydraulic retention times, redox conditions, removal of bulk organic parameters and the fate of chemicals of emerging concern (CECs)...
January 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28078333/topography-guided-buckling-of-swollen-polymer-bilayer-films-into-three-dimensional-structures
#8
Joonwoo Jeong, Yigil Cho, Su Yeon Lee, Xingting Gong, Randall D Kamien, Shu Yang, A G Yodh
Thin films that exhibit spatially heterogeneous swelling often buckle into the third dimension to minimize stress. These effects, in turn, offer a promising strategy to fabricate complex three-dimensional structures from two-dimensional sheets. Here we employ surface topography as a new means to guide buckling of swollen polymer bilayer films and thereby control the morphology of resulting three-dimensional objects. Topographic patterns are created on poly(dimethylsiloxane) (PDMS) films selectively coated with a thin layer of non-swelling parylene on different sides of the patterned films...
February 7, 2017: Soft Matter
https://www.readbyqxmd.com/read/28048404/we-h-201-03-enthusiasm-and-generosity-of-spirit-necessitate-a-volunteering-structure-to-make-them-more-meaningful
#9
Y Pipman
: The desperate need for radiotherapy in low and mid-income countries (LMICs) has been well documented. Roughly 60 % of the worldwide incidence of cancer occurs in these resource-limited settings and the international community alongside governmental and non-profit agencies have begun publishing reports and seeking help from qualified volunteers. However, the focus of several reports has been on how dire the situation is and the magnitude of the problem, leaving most to feel overwhelmed and unsure as to how to help and why to get involved...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047760/we-h-201-04-models-for-developing-medical-physics-educators-and-education-programs-in-the-developing-countries-and-the-potential-role-of-us-universities-and-individual-medical-physicists
#10
P Sprawls
: The desperate need for radiotherapy in low and mid-income countries (LMICs) has been well documented. Roughly 60 % of the worldwide incidence of cancer occurs in these resource-limited settings and the international community alongside governmental and non-profit agencies have begun publishing reports and seeking help from qualified volunteers. However, the focus of several reports has been on how dire the situation is and the magnitude of the problem, leaving most to feel overwhelmed and unsure as to how to help and why to get involved...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047637/we-h-201-00-opportunities-for-physicists-to-support-low-and-mid-income-countries
#11
Julianne Pollard
: The desperate need for radiotherapy in low and mid-income countries (LMICs) has been well documented. Roughly 60 % of the worldwide incidence of cancer occurs in these resource-limited settings and the international community alongside governmental and non-profit agencies have begun publishing reports and seeking help from qualified volunteers. However, the focus of several reports has been on how dire the situation is and the magnitude of the problem, leaving most to feel overwhelmed and unsure as to how to help and why to get involved...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046986/we-h-201-01-the-opportunities-and-benefits-of-helping-lmics-how-helping-them-can-help-you
#12
J Pollard
: The desperate need for radiotherapy in low and mid-income countries (LMICs) has been well documented. Roughly 60 % of the worldwide incidence of cancer occurs in these resource-limited settings and the international community alongside governmental and non-profit agencies have begun publishing reports and seeking help from qualified volunteers. However, the focus of several reports has been on how dire the situation is and the magnitude of the problem, leaving most to feel overwhelmed and unsure as to how to help and why to get involved...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046328/we-h-201-02-emerging-models-and-opportunities-in-global-health-for-medical-physicists-powered-by-information-and-communication-technologies
#13
W Ngwa
: The desperate need for radiotherapy in low and mid-income countries (LMICs) has been well documented. Roughly 60 % of the worldwide incidence of cancer occurs in these resource-limited settings and the international community alongside governmental and non-profit agencies have begun publishing reports and seeking help from qualified volunteers. However, the focus of several reports has been on how dire the situation is and the magnitude of the problem, leaving most to feel overwhelmed and unsure as to how to help and why to get involved...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28043001/flow-cytometry-for-immediate-follow-up-of-drinking-water-networks-after-maintenance
#14
Sam Van Nevel, Benjamin Buysschaert, Karen De Roy, Bart De Gusseme, Lieven Clement, Nico Boon
Drinking water networks need maintenance every once in a while, either planned interventions or emergency repairs. When this involves opening of the water pipes, precautionary measures need to be taken to avoid contamination of the drinking water at all time. Drinking water suppliers routinely apply plating for faecal indicator organisms as quality control in such a situation. However, this takes at least 21 h of waiting time, which can be crucial when dealing with major supply pipes. A combination of flow cytometric (FCM) bacterial cell counts with FCM fingerprinting techniques is proposed in this study as a fast and sensitive additional technique...
December 25, 2016: Water Research
https://www.readbyqxmd.com/read/28040052/examination-of-the-reflection-properties-of-sloping-terminations-to-organ-pipes
#15
Péter Rucz, Kai Dolde, Wei Kuang, Judit Angster, András Miklós
The sound characteristics of both labial and lingual organ pipes are affected to a great extent by the reflection properties of the resonators. In this paper, the reflection properties of sloped pipe terminations are examined and the possible applications in organ building practice are investigated. Sloped shallots of reed organ pipes with different termination angles are of particular interest in this study. For the examination of the reflection properties two different approaches are applied. Sound pulse reflection measurements on model geometries provide experimental data in the time domain, while finite element simulations yield reflection coefficients in the frequency domain...
December 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27998057/spatial-models-of-sewer-pipe-leakage-predict-the-occurrence-of-wastewater-indicators-in-shallow-urban-groundwater
#16
Patrick R Roehrdanz, Marina Feraud, Do Gyun Lee, Jay C Means, Shane A Snyder, Patricia A Holden
Twentieth century municipal wastewater infrastructure greatly improved U.S. urban public health and water quality. However, sewer pipes deteriorate, and their accumulated structural defects may release untreated wastewater to the environment via acute breaks or insidious exfiltration. Exfiltrated wastewater constitutes a loss of potentially reusable water and delivers a complex and variable mix of contaminants to urban shallow groundwater. Yet, predicting where deteriorated sewers impinge on shallow groundwater has been challenging...
January 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/27938247/estimating-diesel-fuel-exposure-for-a-plumber-repairing-an-underground-pipe
#17
Mary Finn, Mark Stenzel, Gurumurthy Ramachandran
We estimated the diesel fuel exposure of a plumber repairing an underground water line leak at a truck stop. The repair work was performed over three days during which the plumber spent most of his time in a pit filled with a mixture of water and diesel fuel. Thus, the plumber was exposed via both the inhalation and dermal routes. While previously asymptomatic, he was diagnosed with acute renal failure 35 days after working at this site. No measurements were available for estimating either inhalation or dermal exposures or the cumulative dose and, therefore, two different approaches were used that were based on simple models of the exposure scenario...
December 12, 2016: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/27914290/the-interaction-of-surfactants-with-plastic-and-copper-plumbing-materials-during-decontamination
#18
Karen S Casteloes, Gamini P Mendis, Holly K Avins, John A Howarter, Andrew J Whelton
The study goal was to examine the effectiveness of surfactants to decontaminate plastic and copper potable water plumbing components. Several common potable water pipe and gasket plastics were examined as well as Alconox(®) detergent, Dawn(®) soap, and MAGIT-DG 100 surfactants. Results showed that the MAGIT-DG 100 solutions permeated all plastics within 3days, effectively compromising tensile strength (-82%), physical dimension (+43% volume, +45% weight), and oxidative resistance (-15%). A variety of MAGIT-DG 100 solution compounds permeated plastic samples, not just the declared major ingredient...
March 5, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27897428/functionalization-of-polypyrrole-nano-pipes-with-redox-active-polyoxometalates-poms-for-ultrahigh-energy-density-supercapacitors
#19
Deepak Dubal, Belén Ballesteros, Ashwini Mohite, Pedro Gomez-Romero
Hybrid materials are prominent role-models for the fabrication of high performance supercapacitors. Here, we have explored organic-inorganic hybrid materials based on open-end porous 1D polypyrrole nano-pipes (PPy-NPipes) and heteropolyoxometalate (phosphotungstate ([PW12O40]3- (PW12) or phosphomolybdate [PMo12O40]3- (PMo12)) that display excellent areal capacitances. Two different hybrid materials (PMo12@PPy and PW12@PPy) were effectively synthesized and applied for symmetric supercapacitors. The anchoring of the inorganic nanoclusters onto the conducting polymer nanopipes led indeed to electrodes which stood up to our best expectations exhibiting outstanding areal capacitances which are almost 1...
November 29, 2016: ChemSusChem
https://www.readbyqxmd.com/read/27883920/nano-exploration-of-organic-conditioning-film-formed-on-polymeric-surfaces-exposed-to-drinking-water
#20
Grégory Francius, Racha El Zein, Laurence Mathieu, Florence Gosselin, Armand Maul, Jean-Claude Block
Adsorption of organic macromolecules onto surfaces in contact with waters forms a so-called conditioning film and induces modifications of the surface properties. Here, we characterized conditioning films formed onto two hydrophobic materials (used as pipe liner) and immersed for 24 h in tap water. Using combination of atomic force microscopy (AFM), and chemical force microscopy (CFM), we detected some changes in roughness and hydrophilic/hydrophobic balance of the surface of the tested coupons, and also the deposition of numerous organic polymers (few millions/cm(2)) randomly distributed on the surface...
February 1, 2017: Water Research
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