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https://www.readbyqxmd.com/read/29334649/determining-variables-that-influence-the-phosphorus-content-of-waste-stabilization-pond-algae
#1
Matthew D Sells, Nicola Brown, Andrew N Shilton
Waste stabilization ponds (WSP) are one of the most common forms of wastewater treatment for smaller communities globally, but have poor phosphorus removal. It is known that WSP algae can accumulate polyphosphate within their cells in excess of that needed for cell function. If polyphosphate accumulation could be triggered at the higher range of WSP cell concentrations, phosphorus removal from domestic wastewater could be significantly improved. However, this phenomenon is sporadic and still not fully understood...
January 8, 2018: Water Research
https://www.readbyqxmd.com/read/29334410/selective-binding-and-precipitation-of-cesium-ions-from-aqueous-solutions-a-size-driven-supramolecular-reaction
#2
Ravell Bengiat, Benny Bogoslavsky, Daniel Mandler, Joseph Almog
The nuclear disasters of Chernobyl and Fukushima presented an urgent need for finding solutions to treatment of radioactive wastes. Among the by-products of nuclear fission is the radioactive 137Cs, which evokes an environmental hazard due to its long half-life (>30 years) and high solubility in water. In this work, a water-soluble organic ligand, readily obtained from alloxan and 1,3,5-benzenetriol, has been found to selectively bind and precipitate Cs+ ions from aqueous solutions. The special rigid structure of the ligand, which consists of a "tripodal" carbonyl base above and below an aromatic plane, contributes to the size-driven selectivity towards the large Cs+ ions and the formation of a giant, insoluble supramolecular complex...
January 15, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29333852/synthesis-of-mip-nanoparticles-for-%C3%AE-casein-detection-using-spr-as-a-milk-allergen-sensor
#3
Jon Ashley, Yunus Shukor, Roberta D'Aurelio, Linda Trinh, Thomas Lawrence Rodgers, Jeff Temblay, Mike Pleasants, Ibtisam E Tothill
Food recalls due to undeclared allergens or contamination are costly to the food manufacturing industry worldwide. As the industry strives for better manufacturing efficiencies over a diverse range of food products, there is a need for the development of new analytical techniques to improve monitoring the presence of unintended food allergens during the food manufacturing process. In particular, the monitoring of wash samples from cleaning in place systems (CIP), used in the cleaning of food processing equipment, would allow for the effective removal of allergen containing ingredients in between food batches...
January 15, 2018: ACS Sensors
https://www.readbyqxmd.com/read/29333644/school-lunch-consumption-among-3-food-service-providers-in-new-orleans
#4
Melanie Canterberry, Samantha Francois, Taslim van Hattum, Lindsey Rudov, Thomas W Carton
BACKGROUND: Louisiana has one of the highest rates of overweight and obese children in the United States. The Healthy School Food Collaborative (HSFC) was created to allow New Orleans's schools to select their own healthy school Food Service Provider (FSP) with requirements for higher nutritional standards than traditional options. The goal of this cross-sectional study was to examine whether HSFC membership was associated with lunch consumption rates in elementary school children. METHODS: An 8-week plate waste study examining 18,070 trays of food among fourth and fifth graders was conducted...
February 2018: Journal of School Health
https://www.readbyqxmd.com/read/29332949/convergent-synthesis-of-%C3%AE-branched-amines-by-transition-metal-catalyzed-c-h-bond-additions-to-imines
#5
Joshua R Hummel, Jonathan A Ellman
α-Branched amines are ubiquitous in drugs and natural products, and consequently, synthetic methods that provide convergent and efficient entry to these structures are of considerable value. Transition-metal-catalyzed C-H bond additions to imines have the potential to be highly practical and atom-economic approaches for the synthesis of a diverse and complex array of α-branched amine products. These strategies typically employ readily available starting inputs, display high functional group compatibility, and often avoid the production of stoichiometric waste byproducts...
November 2017: Israel Journal of Chemistry
https://www.readbyqxmd.com/read/29332935/novel-treatment-strategies-for-chronic-kidney-disease-insights-from-the-animal-kingdom
#6
REVIEW
Peter Stenvinkel, Johanna Painer, Makoto Kuro-O, Miguel Lanaspa, Walter Arnold, Thomas Ruf, Paul G Shiels, Richard J Johnson
Many of the >2 million animal species that inhabit Earth have developed survival mechanisms that aid in the prevention of obesity, kidney disease, starvation, dehydration and vascular ageing; however, some animals remain susceptible to these complications. Domestic and captive wild felids, for example, show susceptibility to chronic kidney disease (CKD), potentially linked to the high protein intake of these animals. By contrast, naked mole rats are a model of longevity and are protected from extreme environmental conditions through mechanisms that provide resistance to oxidative stress...
January 15, 2018: Nature Reviews. Nephrology
https://www.readbyqxmd.com/read/29332540/using-the-woman-abuse-screening-tool-to-screen-for-and-assess-dating-violence-in-college-students
#7
Janet Yuen-Ha Wong, Daniel Yee-Tak Fong, Jessie Ho-Yin Yau, Edmond Pui-Hang Choi, Anna Wai-Man Choi, Judith Belle Brown
The study aimed to evaluate the measurement properties of the Woman Abuse Screening Tool (WAST) in Chinese college students. A cross-sectional survey was conducted in Hong Kong. A cutoff score of 10 was found to be able to discriminate between abused and nonabused Chinese young adults. The total score was significantly correlated with total scores for anxiety and depression on the Chinese version of the Hospital Anxiety and Depression Scale. Two-factor structure of the WAST was supported by exploratory and confirmatory factor analyses...
October 1, 2017: Violence Against Women
https://www.readbyqxmd.com/read/29332394/compositional-dependence-of-solubility-retention-of-molybdenum-oxides-in-aluminoborosilicate-based-model-nuclear-waste-glasses
#8
Antoine Brehault, Deepak Patil, Hrishikesh Kamat, Randall E Youngman, Lynn M Thirion, John C Mauro, Claire Corkhill, John Stuart McCloy, Ashutosh Goel
Molybdenum oxides are an integral component of the high-level waste streams being generated from the nuclear reactors in several countries. Although borosilicate glass has been chosen as the baseline waste form by most of the countries to immobilize these waste streams, molybdate oxyanions (MoO42-) exhibit very low solubility (~ 1 mol.%) in these glass matrices. In the past 3-4 decades, several studies describing the compositional and structural dependence of molybdate anions in borosilicate and aluminoborosilicate glasses have been reported in the literature, providing a basis for our understanding of fundamental science that governs the solubility and retention of these species in the nuclear waste glasses...
January 14, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29332271/biodegradation-of-plastics-current-scenario-and-future-prospects-for-environmental-safety
#9
Temoor Ahmed, Muhammad Shahid, Farrukh Azeem, Ijaz Rasul, Asad Ali Shah, Muhammad Noman, Amir Hameed, Natasha Manzoor, Irfan Manzoor, Sher Muhammad
Plastic is a general term used for a wide range of high molecular weight organic polymers obtained mostly from the various hydrocarbon and petroleum derivatives. There is an ever-increasing trend towards the production and consumption of plastics due to their extensive industrial and domestic applications. However, a wide spectrum of these polymers is non-biodegradable with few exceptions. The extensive use of plastics, lack of waste management, and casual community behavior towards their proper disposal pose a significant threat to the environment...
January 13, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29331920/engineering-yeast-for-utilization-of-alternative-feedstocks
#10
REVIEW
Allison Yaguchi, Michael Spagnuolo, Mark Blenner
Realizing the economic benefits of alternative substrates for commodity chemical bioproduction typically requires significant metabolic engineering of common model organisms, such as Saccharomyces cerevisiae. A growing toolkit is enabling engineering of non-conventional yeast that have robust native metabolism for xylose, acetate, aromatics, and waste lipids. Scheffersomyces stipitis was engineered to produce itaconic acid from xylose. Yarrowia lipolytica produced lipids from dilute acetate at over 100g/L. Cutaneotrichosporon oleaginosus was engineered to produce omega-3 fatty acids and recently was shown to accumulate nearly 70% lipids when grown on aromatics as a carbon source...
January 10, 2018: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/29331913/speciation-evolution-of-zinc-and-copper-during-pyrolysis-and-hydrothermal-carbonization-treatments-of-sewage-sludges
#11
Rixiang Huang, Bei Zhang, Emily M Saad, Ellery D Ingall, Yuanzhi Tang
Thermal and hydrothermal treatments are promising techniques for sewage sludge management that can potentially facilitate safe waste disposal, energy recovery, and nutrient recovery/recycling. Content and speciation of heavy metals in the treatment products affect the potential environmental risks upon sludge disposal and/or application of the treatment products. Therefore, it is important to study the speciation transformation of heavy metals and the effects of treatment conditions. By combining synchrotron X-ray spectroscopy/microscopy analysis and sequential chemical extraction, this study systematically characterized the speciation of Zn and Cu in municipal sewage sludges and their chars derived from pyrolysis (a representative thermal treatment technique) and hydrothermal carbonization (HTC; a representative hydrothermal treatment technique)...
January 4, 2018: Water Research
https://www.readbyqxmd.com/read/29331892/dynamic-probabilistic-material-flow-analysis-of-nano-sio2-nano-iron-oxides-nano-ceo2-nano-al2o3-and-quantum-dots-in-seven-european-regions
#12
Yan Wang, Bernd Nowack
Static environmental exposure assessment models based on material flow analysis (MFA) have previously been used to estimate flows of engineered nanomaterials (ENMs) to the environment. However, such models do not account for changes in the system behavior over time. Dynamic MFA used in this study includes the time-dependent development of the modelling system by considering accumulation of ENMs in stocks and the environment, and the dynamic release of ENMs from nano-products. In addition, this study also included regional variations in population, waste management systems, and environmental compartments, which subsequently influence the environmental release and concentrations of ENMs...
January 11, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29331852/no-time-to-waste-organic-waste-nanosizing-converts-remains-of-food-processing-into-refined-materials
#13
Sharoon Griffin, Muhammad Sarfraz, Verda Farida, Muhammad Jawad Nasim, Azubuike P Ebokaiwe, Cornelia M Keck, Claus Jacob
Modern food processing results in considerable amounts of side-products, such as grape seeds, walnut shells, spent coffee grounds, and harvested tomato plants. These materials are still rich in valuable and biologically active substances and therefore of interest from the perspective of waste management and "up-cycling". In contrast to traditional, often time consuming and low-value uses, such as vermicomposting and anaerobic digestion, the complete conversion into nanosuspensions unlocks considerable potentials of and new applications for such already spent organic materials without the need of extraction and without producing any additional waste...
January 11, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29331718/partition-of-zn-cd-and-pb-during-co-combustion-of-sedum-plumbizincicola-and-sewage-sludge
#14
Feihong Guo, Zhaoping Zhong, Hui Xue
Co-combustion of sedum plumbizincicola and sewage sludge was performed in a tubular furnace. The influence of experimental conditions on the partitioning of Zn, Cd, and Pb was investigated. The results showed that 30% sewage sludge was proposed as the optimal ratio for the co-combustion as a compromise between low calorific value and high amount of heavy metal remained in the bottom ash. High temperature increased the volatilization degree of heavy metals, among which the performance of Cd and Pb was obvious than Zn...
January 6, 2018: Chemosphere
https://www.readbyqxmd.com/read/29330602/ecosystem-carbon-emissions-from-2015-forest-fires-in-interior-alaska
#15
Christopher Potter
BACKGROUND: In the summer of 2015, hundreds of wildfires burned across the state of Alaska, and consumed more than 1.6 million ha of boreal forest and wetlands in the Yukon-Koyukuk region. Mapping of 113 large wildfires using Landsat satellite images from before and after 2015 indicated that nearly 60% of this area was burned at moderate-to-high severity levels. Field measurements near the town of Tanana on the Yukon River were carried out in July of 2017 in both unburned and 2015 burned forested areas (nearly adjacent to one-another) to visually verify locations of different Landsat burn severity classes (low, moderate, or high; LBS, MBS, HBS)...
January 8, 2018: Carbon Balance and Management
https://www.readbyqxmd.com/read/29330530/estimation-of-lean-body-mass-by-creatinine-kinetics-increases-the-prevalence-of-muscle-wasting-in-peritoneal-dialysis-patients-compared-to-bioimpedance
#16
Suree Yoowannakul, Andrew Davenport
Dialysis patients are at increased risk for muscle wasting, and time efficient screening tests are required for to allow for early detection. Creatinine kinetics have been advocated to estimate lean body mass (LBM) in peritoneal dialysis (PD) patients, and can be readily calculated in clinical practice from peritoneal dialysate effluent and urine collections. Bioimpedance is increasingly available, and we compared methods in 434 PD patients (55% men, 33.3% diabetics), mean age 55.2 ± 16.2 years. LBM was lower by creatinine kinetics (47...
January 12, 2018: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/29330527/aquaglyceroporin-pbaqp-is-required-for-efficient-progression-through-the-liver-stage-of-plasmodium-infection
#17
Dominique Promeneur, Godfree Mlambo, Peter Agre, Isabelle Coppens
The discovery of aquaglyceroporins (AQP) has highlighted a new mechanism of membrane solute transport that may hold therapeutic potential for controlling parasitic infections, including malaria. Plasmodium parasites express a single AQP at the plasma membrane that functions as a channel for water, nutrients and waste into and out cells. We previously demonstrated that Plasmodium berghei targeted for PbAQP deletion are deficient in glycerol import and less virulent than wild-type parasites during the blood developmental stage...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330191/thermophilic-alkaline-fermentation-followed-by-mesophilic-anaerobic-digestion-for-efficient-hydrogen-and-methane-production-from-waste-activated-sludge-focusing-on-dynamics-of-bacterial-pathogens-as-revealed-by-the-combination-of-metagenomic-and-qpcr-analysis
#18
Jingjing Wan, Yuhang Jing, Yue Rao, Shicheng Zhang, Gang Luo
Thermophilic alkaline fermentation followed by mesophilic anaerobic digestion (TM) for hydrogen and methane production from waste activated sludge (WAS) was investigated. TM process was also compared to mesophilic alkaline fermentation followed by mesophilic anaerobic digestion (MM) process and one-stage mesophilic anaerobic digestion (M) process. The results showed that both hydrogen yield (74.5 mLH2/gVS) and methane yield (150.7 mLCH4/gVS) in TM process were higher than those (6.7 mLH2/gVS and 127.8 mLCH4/gVS) in MM process...
January 12, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29329958/contact-tracing-for-the-control-of-infectious-disease-epidemics-chronic-wasting-disease-in-deer-farms
#19
Chris Rorres, Maria Romano, Jennifer A Miller, Jana M Mossey, Tony H Grubesic, David E Zellner, Gary Smith
Contact tracing is a crucial component of the control of many infectious diseases, but is an arduous and time consuming process. Procedures that increase the efficiency of contact tracing increase the chance that effective controls can be implemented sooner and thus reduce the magnitude of the epidemic. We illustrate a procedure using Graph Theory in the context of infectious disease epidemics of farmed animals in which the epidemics are driven mainly by the shipment of animals between farms. Specifically, we created a directed graph of the recorded shipments of deer between deer farms in Pennsylvania over a timeframe and asked how the properties of the graph could be exploited to make contact tracing more efficient should Chronic Wasting Disease (a prion disease of deer) be discovered in one of the farms...
December 14, 2017: Epidemics
https://www.readbyqxmd.com/read/29329831/physicochemical-properties-nutritional-value-and-techno-functional-properties-of-goldenberry-physalis-peruviana-waste-powder-concise-title-composition-of-goldenberry-juice-waste
#20
Sayed M Mokhtar, Hesham M Swailam, Hassan El-Sayed Embaby
Goldenberry waste powder, contained 5.87% moisture, 15.89% protein, 13.72% fat, 3.52% ash, 16.74% dietary fiber and 61% carbohydrates. Potassium (560 mg/100 g) was the predominant element followed by sodium (170 mg/100 g) and phosphorus (130 mg/100 g). Amino acid analysis gave high levels of cystine/methionine, histidine and tyrosine/phenylalanine. Goldenberry waste powder had good levels of the techno-functional properties including water absorption index, swelling index, foaming capacity and stability (3...
May 15, 2018: Food Chemistry
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