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https://www.readbyqxmd.com/read/28934673/an-analysis-of-chemicals-and-other-constituents-found-in-produced-water-from-hydraulically-fractured-wells-in-california-and-the-challenges-for-wastewater-management
#1
Emily A Chittick, Tanja Srebotnjak
As high-volume hydraulic fracturing (HF) has grown substantially in the United States over the past decade, so has the volume of produced water (PW), i.e., briny water brought to the surface as a byproduct of oil and gas production. According to a recent study (Groundwater Protection Council, 2015), more than 21 billion barrels of PW were generated in 2012. In addition to being high in TDS, PW may contain hydrocarbons, PAH, alkylphenols, naturally occurring radioactive material (NORM), metals, and other organic and inorganic substances...
September 18, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28934004/development-of-functional-composts-using-spent-coffee-grounds-poultry-manure-and-biochar-through-microbial-bioaugmentation
#2
S Aalfin Emmanuel, Jangyeon Yoo, Eok-Jo Kim, Jae-Soo Chang, Young-In Park, Sung-Cheol Koh
Spent coffee grounds (SCG), poultry manure, and agricultural waste-derived biochar were used to manufacture functional composts through microbial bioaugmentation. The highest yield of tomato stalk-based biochar (40.7%) was obtained at 450°C with a surface area of 2.35 m(2) g(-1). Four pilot-scale composting reactors were established to perform composting for 45 days. The ratios of NH4(+)-N/NO3(-)-N, which served as an indicator of compost maturity, indicate rapid, and successful composting via microbial bioaugmentation and biochar amendment...
September 21, 2017: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/28933989/role-of-pex5-ubiquitination-in-maintaining-peroxisome-dynamics-and-homeostasis
#3
Wei Wang, Suresh Subramani
Peroxisomes are essential and dynamic organelles that allow cells to rapidly adapt and cope with changing environments and/or physiological conditions by modulation of both peroxisome biogenesis and turnover. Peroxisome biogenesis involves the assembly of peroxisome membranes and the import of peroxisomal matrix proteins. The latter depends on the receptor, PEX5, which recognizes peroxisomal matrix proteins in the cytosol directly or indirectly, and transports them to the peroxisomal lumen. In this review, we discuss the role of PEX5 ubiquitination in both peroxisome biogenesis and turnover, specifically in PEX5 receptor recycling, stability and abundance, as well as its role in pexophagy (autophagic degradation of peroxisomes)...
September 21, 2017: Cell Cycle
https://www.readbyqxmd.com/read/28933840/divergent-synthesis-of-revised-apratoxin-e-30-epi-apratoxin-e-and-30s-30r-oxoapratoxin-e
#4
Zhuo-Ya Mao, Chang-Mei Si, Yi-Wen Liu, Han-Qing Dong, Bang-Guo Wei, Guo-Qiang Lin
In this report, originally proposed apratoxin E (30S-7), revised apratoxin E (30R-7), and (30S)/(30R)-oxoapratoxin E (30S)-38/(30R)-38 were efficiently prepared by two synthetic methods. The chiral lactone 10, recycled from the degradation of saponin glycosides, was utilized to prepare the key non-peptide fragment 9. Our alternative convergent assembly strategy was applied to the divergent synthesis of revised apratoxin E and its three analogs. Moreover, ring-closing metathesis (RCM) was first time found to be an efficient strategy for the macrocyclization of apratoxins...
September 21, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28933824/pd-cu-oxide-nanoconjugate-at-zeolite-y-crystallite-crafting-the-mesoporous-channels-for-selective-oxidation-of-benzyl-alcohols
#5
Mukesh Sharma, Biraj Das, Mitu Sharma, Biplab K Deka, Young-Bin Park, Suresh K Bhargava, Kusum K Bania
Solid-state grinding of palladium and copper salts allowed the growth of palladium/copper oxide interface at the zeolite-Y surface. The hybrid nanostructured material was used as reusable heterogeneous catalyst for selective oxidation of various benzyl alcohols. The large surface area provided by the zeolite-Y matrix highly influenced the catalytic activity as well as the recyclability of the synthesized catalyst. Impregnation of PdO-CuO nanoparticles on zeolite crystallite leads to the generation of mesoporous channel that probably prevented the leaching of the metal-oxide nanoparticles and endorsed high mass transfer...
September 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28933685/adsorption-of-re-3-from-aqueous-solutions-by-bayberry-tannin-immobilized-on-chitosan
#6
Xianying Qiu, Yueyue Shen, Ruilin Yang, Hongcheng Zhang, Shilin Zhao
Bayberry tannin immobilized on chitosan (CS-BT) was successfully prepared, and its adsorption performance was studied for aqueous solutions of rare earth ions. The as-prepared absorbents were characterized by Fourier transform infrared spectrometry and scanning electron microscopy. The equilibrium adsorption capacity was achieved in approximately 30 min. The adsorption process of CS-BT for Nd(3+) ion was well fitted with a Freundlich model. Sorption of Nd(3+) onto CS-BT could be well described by the pseudo second-order kinetics...
September 21, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28933654/commonalities-and-differences-in-plants-deficient-in-autophagy-and-alternative-pathways-of-respiration-on-response-to-extended-darkness
#7
Jessica A S Barros, João Henrique F Cavalcanti, David B Medeiros, Adriano Nunes-Nesi, Tamar Avin-Wittenberg, Alisdair R Fernie, Wagner L Araújo
Autophagy is a highly conserved cellular mechanism in eukaryotes allowing the degradation of cell constituents. It is of crucial significance in both cellular homeostasis and nutrient recycling. During energy limited conditions plant cells can metabolize alternative respiratory substrates, such as amino acids, providing electrons to the mitochondrial metabolism via the tricarboxylic acid (TCA) cycle or electron transfer flavoprotein/ electron transfer flavoprotein ubiquinone oxidoreductase (ETF/ETFQO) system...
September 21, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28933603/autophagy-enables-retromer-dependent-plasma-membrane-translocation-of-slc2a1-glut-to-enhance-glucose-uptake
#8
Srirupa Roy, Jayanta Debnath
Macroautophagy/autophagy is traditionally viewed as an intracellular catabolic pathway that recycles core metabolites during starvation or stress. Recently, we found that autophagy also functions in the control of glucose uptake from the extracellular environment by facilitating cell surface expression of the glucose transporter SLC2A1/GLUT1. In response to increased glycolytic demand or acute glucose starvation, autophagosome induction titrates the RabGAP protein TBC1D5 away from its inhibitory interaction with the retromer complex and into MAP1LC3(+) compartments...
September 21, 2017: Autophagy
https://www.readbyqxmd.com/read/28933601/transcriptional-regulation-of-autophagy-and-lysosomal-function-by-bromodomain-protein-brd4
#9
Jun-Ichi Sakamaki, Kevin M Ryan
Macroautophagy/autophagy is an intracellular recycling system that delivers cytoplasmic organelles and materials to lysosomes for degradation. This process is operated by autophagy-related (ATG) genes and tightly controlled by stress-responsive signaling pathways. Our recent study revealed that autophagy programs are transcriptionally suppressed by the BET family protein BRD4. This repression is alleviated during nutrient deprivation through the AMPK-SIRT1 pathway. Our findings therefore provide new insights into the regulation of autophagy...
September 21, 2017: Autophagy
https://www.readbyqxmd.com/read/28933590/rubcn-rubicon-and-egfr-regulate-lysosomal-degradative-processes-in-the-retinal-pigment-epithelium-rpe-of-the-eye
#10
Luis Muniz-Feliciano, Teresa A Doggett, Zhenqing Zhou, Thomas A Ferguson
Macroautophagy/autophagy is an intracellular stress survival and recycling system whereas phagocytosis internalizes material from the extracellular milieu; yet, both pathways utilize lysosomes for cargo degradation. Whereas autophagy occurs in all cells, phagocytosis is performed by cell types such as macrophages and the retinal pigment epithelial (RPE) cells of the eye where it is supported by the noncanonical autophagy process termed LC3-associated phagocytosis (LAP). Autophagy and LAP are distinct pathways that use many of the same mediators and must compete for cellular resources, suggesting that cells may regulate both processes under homeostatic and stress conditions...
September 21, 2017: Autophagy
https://www.readbyqxmd.com/read/28933549/size-regulation-and-stability-enhancement-of-pt-nanoparticle-catalyst-via-polypyrrole-functionalization-of-carbon-nanotube-supported-pt-tetranuclear-complex
#11
Satoshi Muratsugu, Shota Miyamoto, Kana Sakamoto, Kentaro Ichihashi, Chang Kyu Kim, Nozomu Ishiguro, Mizuki Tada
A novel multiwall carbon nanotube (MWCNT) and polypyrrole (PPy) composite was found to be useful for preparing durable Pt nanoparticle catalysts of highly regulated sizes. A new pyrene-functionalized Pt4 complex was attached to the MWCNT surface which was functionalized with PPy matrix to yield Pt4 complex/PPy/MWCNT composites without decomposition of the Pt4 complex units. The attached Pt4 complexes in the composite were transformed into Pt(0) nanoparticles with sizes of 1.0-1.3 nm at a Pt loading range of 2 to 4 wt %...
September 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28933535/development-of-visible-light-induced-photoelectrochemical-platform-based-on-cyclometalated-iridium-iii-complex-for-bioanalysis
#12
Chunxiang Li, Weisen Lu, Ming Zhu, Bo Tang
The performance of the photoelectrochemical (PEC) bioanalysis relies closely on the properties of the usedphotoactive species. In this study, a visible-light induced PEC active species, [(C6)2Ir(dcbpy)]+PF6- (C6 = coumarin 6, dcbpy = 2,2'-bipyridine-4,4'-dicarboxylic acid) was prepared based on C6 with the stronger absorbance in the visible region. The as-prepared complex was characterized by 1H NMR,UV-visible absorption and cyclic voltammetry. It exhibits intense absorption in visible region at 480 nm with a molar extinction coefficient (ε) of more 40000 M-1cm-1, which is approximately twice that of Ru(bpy)32+...
September 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28933485/synthesis-characterization-and-catalytic-epoxidation-properties-of-lanthanide-stabilized-peroxoisopolytungstates
#13
Jipeng Guo, Yanjun Niu, Lanying Song, Qiaofei Xu, Jingkun Lu, Pengtao Ma, Dongdi Zhang, Chao Zhang, Jingyang Niu, Jingping Wang
A series of new lanthanide-containing peroxoisopolyoxotungstates, K6Na4[H32{Ln4(WO4)(H2O)16[W7O22(O2)2]4}3]·105H2O [Ln = Ce(III) (1), Nd(III) (2), Sm(III) (3), Tb(III) (4), Er(III) (5)], have been successfully synthesized and structurally characterized. All polyanions [Ln(WO4)(H2O)16{W7O22(O2)2}4](14-) are isostructural and consist of a central [Ln(WO4)(H2O)16](10+) cluster surrounded by four peripheral [W7O22(O2)2](6-) units. They could act as efficient recyclable catalysts for the epoxidation of various alkenes including different cycloalkenes, styrene derivatives, internal and long-chain alkenes...
September 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28933461/decoration-of-exfoliated-black-phosphorus-with-nickel-nanoparticles-and-its-application-in-catalysis
#14
Maria Caporali, Manuel Serrano-Ruiz, Francesca Telesio, Stefan Heun, Giuseppe Nicotra, Corrado Spinella, Maurizio Peruzzini
Nickel nanoparticles were dispersed on the surface of exfoliated black phosphorus and the resulting nanohybrid Ni/2DBP showed an improved stability with respect to pristine 2D BP when kept under ambient conditions in the dark. Ni/2DBP was applied as a catalyst in the semihydrogenation of phenylacetylene and exhibited high conversion and selectivity towards styrene. These features were preserved after recycling tests revealing the high stability of the nanohybrid.
September 21, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28931584/use-of-a-super-child-approach-to-assess-the-vitamin-a-equivalence-of-moringa-oleifera-leaves-develop-a-compartmental-model-for-vitamin-a-kinetics-and-estimate-vitamin-a-total-body-stores-in-young-mexican-children
#15
Veronica Lopez-Teros, Jennifer Lynn Ford, Michael H Green, Guangwen Tang, Michael A Grusak, Luis Quihui-Cota, Tawanda Muzhingi, Mariela Paz-Cassini, Humberto Astiazaran-Garcia
Background: Worldwide, an estimated 250 million children <5 y old are vitamin A (VA) deficient. In Mexico, despite ongoing efforts to reduce VA deficiency, it remains an important public health problem; thus, food-based interventions that increase the availability and consumption of provitamin A-rich foods should be considered.Objective: The objectives were to assess the VA equivalence of (2)H-labeled Moringa oleifera (MO) leaves and to estimate both total body stores (TBS) of VA and plasma retinol kinetics in young Mexican children...
September 20, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28931348/assessment-of-the-municipal-solid-waste-management-system-in-accra-ghana-a-wasteaware-benchmark-indicator-approach
#16
Kwaku Oduro-Appiah, Anne Scheinberg, Anthony Mensah, Abraham Afful, Henry Kofi Boadu, Nanne de Vries
This article assesses the performance of the city of Accra, Ghana, in municipal solid waste management as defined by the integrated sustainable waste management framework. The article reports on a participatory process to socialise the Wasteaware benchmark indicators and apply them to an upgraded set of data and information. The process has engaged 24 key stakeholders for 9 months, to diagram the flow of materials and benchmark three physical components and three governance aspects of the city's municipal solid waste management system...
September 1, 2017: Waste Management & Research
https://www.readbyqxmd.com/read/28931273/design-synthesis-and-application-of-polymer-supported-silicon-transfer-agents-for-cross-coupling-reactions-with-organolithium-reagents
#17
Minh H Nguyen, Kevin T O'Brien, Amos B Smith Iii
The initial rational design, synthesis and validation of polymer-supported siloxane transfer agents have been achieved that permit the direct use of organolithium reagents in the palladium-catalyzed cross-coupling reactions. Through rational design, two generations of polymer support were developed that significantly simplify product purification and the transfer agent recycling.
September 20, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28930972/study-of-protein-protein-interactions-in-autophagy-research
#18
Secil Erbil-Bilir, Nur M Kocaturk, Melih Yayli, Devrim Gozuacik
Protein-protein interactions are important for understanding cellular signaling cascades and identifying novel pathway components and protein dynamics. The majority of cellular activities require physical interactions between proteins. To analyze and map these interactions, various experimental techniques as well as bioinformatics tools were developed. Autophagy is a cellular recycling mechanism that allows the cells to cope with different stressors, including nutrient deprivation, chemicals, and hypoxia. In order to better understand autophagy-related signaling events and to discover novel factors that regulate protein complexes in autophagy, we performed protein-protein interaction screens...
September 9, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28929938/fo-md-hybrid-system-for-real-dairy-wastewater-recycling
#19
Hongwei Song, Fang Xie, Weiwei Chen, Jinrong Liu
This study investigated a forward osmosis and membrane distillation (FO/MD) hybrid system for real dairy wastewater recycling. Two types of FO membranes, cellulose triacetate embedded polyester screen support (CTA-ES) and aquaporin inside (AQP), were employed. Sodium chloride was used as the draw solution. A cross-flow FO cell and an air gap membrane distillation (AGMD) module were established to conduct individual FO experiments and FO/MD experiments. From the experiments, an analysis of the water flux (Jw), reverse draw solute flux (Js), Js/Jw ratio and contaminant rejection was performed...
September 7, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28929890/greening-healthcare-at-muskoka-algonquin-healthcare
#20
Debra Stone
Waste diversion is fundamental to reducing the ecological footprint. Until 2012, waste generated by Muskoka Algonquin Healthcare (MAHC) was not incorporated into any formal waste diversion efforts. In 2012, the Reduce, Recycle, Waste Diversion Program was initiated. Support for the program was endorsed by the senior leadership team, staff, and the community, and incorporated into the strategic plan, which was instrumental in the program's success. The goal of the waste diversion program was to help MAHC work towards a sustainable future and make MAHC a leading hospital in making responsible environmental choices...
March 2017: Healthcare Management Forum
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