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https://www.readbyqxmd.com/read/27936400/wicking-of-light-hydrophobic-liquid-phase-from-water-by-pulverized-rubber-theoretical-and-experimental-analyses
#1
Daria Boglaienko, Berrin Tansel
Pulverized rubber (PR) can be utilized for capturing floating oils to prevent spreading and volatilization of hydrocarbons. Experiments were conducted using PR with four different particle sizes (ranging from 0.075 to 0.600mm) and South Louisiana crude oil. The oil capture performance of the PR particles was compared with that of powdered activated carbon (AC). Oil-particle interactions were analyzed using capillary theories for lateral aggregation and wicking processes, as well as sorption capacity in relation to particle size...
November 30, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/27936351/metal-exposures-at-three-u-s-electronic-scrap-recycling-facilities
#2
Diana Ceballos, Catherine Beaucham, Elena Page
Many metals found in electronic scrap are known to cause serious health effects, including but not limited to cancer and respiratory, neurologic, renal, and reproductive damage. The National Institute for Occupational Safety and Health/Centers for Disease Control and Prevention performed three health hazard evaluations at electronic scrap recycling facilities in the U.S. to characterize employee exposure to metals and recommend control strategies to reduce these exposures. We performed air, surface, and biological monitoring for metals...
December 9, 2016: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/27935765/gb3-binding-lectins-as-potential-carriers-for-transcellular-drug-delivery
#3
Stefan K Müller, Isabel Wilhelm, Thomas Schubert, Katharina Zittlau, Anne Imberty, Josef Madl, Thorsten Eierhoff, Roland Thuenauer, Winfried Römer
OBJECTIVES: Epithelial cell layers as well as endothelia forming the blood-brain barrier can drastically reduce the efficiency of drug targeting. Our goal was to investigate lectins recognizing the glycosphingolipid globotriaosylceramide (Gb3) for their potential as carriers for transcytotic drug delivery. METHODS: We utilized an in vitro model based on Madin-Darby canine kidney cells transfected with Gb3 synthase to characterize transcytosis of the Gb3-binding lectins LecA from Pseudomonas aeruginosa and the B-subunit of Shiga toxin (StxB)...
December 9, 2016: Expert Opinion on Drug Delivery
https://www.readbyqxmd.com/read/27934760/molecular-gas-in-the-halo-fuels-the-growth-of-a-massive-cluster-galaxy-at-high-redshift
#4
B H C Emonts, M D Lehnert, M Villar-Martín, R P Norris, R D Ekers, G A van Moorsel, H Dannerbauer, L Pentericci, G K Miley, J R Allison, E M Sadler, P Guillard, C L Carilli, M Y Mao, H J A Röttgering, C De Breuck, N Seymour, B Gullberg, D Ceverino, P Jagannathan, J Vernet, B T Indermuehle
The largest galaxies in the universe reside in galaxy clusters. Using sensitive observations of carbon monoxide, we show that the Spiderweb galaxy-a massive galaxy in a distant protocluster-is forming from a large reservoir of molecular gas. Most of this molecular gas lies between the protocluster galaxies and has low velocity dispersion, indicating that it is part of an enriched intergalactic medium. This may constitute the reservoir of gas that fuels the widespread star formation seen in earlier ultraviolet observations of the Spiderweb galaxy...
December 2, 2016: Science
https://www.readbyqxmd.com/read/27934721/galaxy-formation-through-cosmic-recycling
#5
Nina Hatch
No abstract text is available yet for this article.
December 2, 2016: Science
https://www.readbyqxmd.com/read/27934366/recyclable-hypervalent-iodine-mediated-dehydrogenative-cyclopropanation-under-metal-free-conditions
#6
Ya-Nan Duan, Zhao Zhang, Chi Zhang
A method is developed for the synthesis of cyclopropanes from the C(sp(2))-C(sp(3)) single bonds of β-keto esters with activated methylene compounds under metal-free conditions in the presence of 5-trimethylammonio-1,3-dioxo-1,3-dihydro-1λ(5)-benzo[d][1,2]iodoxol-1-ol anion (AIBX), a recyclable water-soluble hypervalent iodine(V) reagent developed by our group. This mild, efficient method has a wide substrate scope and good functional group tolerance and is complementary to existing cyclopropanation strategies...
December 2, 2016: Organic Letters
https://www.readbyqxmd.com/read/27934260/long-term-impact-of-field-applications-of-sewage-sludge-on-soil-antibiotic-resistome
#7
Wan-Ying Xie, Steve P McGrath, Jian-Qiang Su, Penny R Hirsch, Ian M Clark, Qirong Shen, Yong-Guan Zhu, Fang-Jie Zhao
Land applications of municipal sewage sludge may pose a risk of introducing antibiotic resistance genes (ARGs) from urban environments into agricultural systems. However, how the sewage sludge recycling and application method influence soil resistome and mobile genetic elements (MGEs) remains unclear. In the present study, high through-put quantitative PCR was conducted on the resistome of soils from a field experiment with past (between 1994 and 1997) and annual (since 1994) applications of five different sewage sludges...
December 6, 2016: Environmental Science & Technology
https://www.readbyqxmd.com/read/27934141/encaging-palladium-nanoparticles-in-chitosan-modified-montmorillonite-for-efficient-recyclable-catalysts
#8
Minfeng Zeng, Yudong Wang, Qi Liu, Xia Yuan, Shufeng Zuo, Ruokun Feng, Jing Yang, Baoyi Wang, Chenze Qi, Yao Lin
Metal nanoparticles, once supported by a suitable scaffolding material, can be used as highly efficient heterogeneous catalysts for numerous organic reactions. The challenge, though, is to mitigate the continuous loss of metals from the supporting materials as reactions proceed, so that the catalysts can be recycled multiple times. Herein, we combine the excellent chelating property of chitosan (CS) and remarkable stability of montmorillonite (MMT) into a composite material to support metal catalysts such as palladium (Pd)...
December 7, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27934007/flexibility-matters-cooperative-active-sites-in-covalent-organic-framework-and-threaded-ionic-polymer
#9
Qi Sun, Briana Aguila, Jason Perman, Nicholas Nguyen, Shengqian Ma
The combination of two or more reactive centers working in concert on a substrate to facilitate the reaction is now considered state of the art in catalysis, yet there still remains a tremendous challenge. Few heterogeneous systems of this sort have been exploited, as the active sites spatially separated within the rigid framework are usually difficult to cooperate. It is now shown that this roadblock can be surpassed. The underlying principle of the strategy presented here is the integration of catalytic components with excellent flexibility and porous heterogeneous catalysts, as demonstrated by the placement of linear ionic polymers in close proximity to surface Lewis acid active sites anchored on the walls of a covalent organic framework (COF)...
December 7, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27933976/new-rht-type-metal-organic-frameworks-decorated-with-acylamide-groups-for-efficient-carbon-dioxide-capture-and-chemical-fixation-from-raw-power-plant-flue-gas
#10
Xiangyang Guo, Zhen Zhou, Cong Chen, Junfeng Bai, Cheng He, Chunying Duan
The combination of carbon dioxide capture and chemical fixation in a one-pot process is attractive for both chemists and governments. The cycloaddition of carbon dioxide with epoxides to produce cyclic carbonates is an atomic economical reaction without any side products. By incorporating acylamide to enhance the binding affinity toward CO2, new rht-type metal-organic frameworks (MOFs) with (3, 28) and (3, 24) connected units were constructed. Zn-NTTA with two types of dinuclear paddlewheel building blocks-{Zn2(OOC(-))4} and {Zn2(OOC(-))3}...
November 23, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/27933496/green-synthesis-of-pd-walnut-shell-nanocomposite-using-equisetum-arvense-l-leaf-extract-and-its-application-for-the-reduction-of-4-nitrophenol-and-organic-dyes-in-a-very-short-time
#11
Maryam Bordbar, Nafiseh Mortazavimanesh
Palladium nanoparticles (PdNPs) have been immobilized on the surface of walnut shell powder using Equisetum arvense L. leaf extract as reducing and stabilizing agents in this work. FT-IR spectroscopy, UV-Vis spectroscopy, photoluminescence spectroscopy, X-ray diffraction (XRD) pattern, field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), and transmission electron microscopy (TEM) have been used in the characterization of the nanocomposites thus prepared. High catalytic activity was shown by these nanocomposites in the reduction of different dyes...
December 8, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27933404/genome-wide-high-content-sirna-screening-identifies-the-alzheimer-s-genetic-risk-factor-fermt2-as-a-major-modulator-of-app-metabolism
#12
Julien Chapuis, Amandine Flaig, Benjamin Grenier-Boley, Fanny Eysert, Virginie Pottiez, Gaspard Deloison, Alexandre Vandeputte, Anne-Marie Ayral, Tiago Mendes, Shruti Desai, Alison M Goate, John S K Kauwe, Florence Leroux, Adrien Herledan, Florie Demiautte, Charlotte Bauer, Fréderic Checler, Ronald C Petersen, Kaj Blennow, Henrik Zetterberg, Lennart Minthon, Vivianna M Van Deerlin, Virginia Man-Yee Lee, Leslie M Shaw, John Q Trojanowski, Marilyn Albert, Abhay Moghekar, Richard O'Brien, Elaine R Peskind, Nicolas Malmanche, Gerard D Schellenberg, Pierre Dourlen, Ok-Ryul Song, Carlos Cruchaga, Philippe Amouyel, Benoit Deprez, Priscille Brodin, Jean-Charles Lambert
Genome-wide association studies (GWASs) have identified 19 susceptibility loci for Alzheimer's disease (AD). However, understanding how these genes are involved in the pathophysiology of AD is one of the main challenges of the "post-GWAS" era. At least 123 genes are located within the 19 susceptibility loci; hence, a conventional approach (studying the genes one by one) would not be time- and cost-effective. We therefore developed a genome-wide, high-content siRNA screening approach and used it to assess the functional impact of gene under-expression on APP metabolism...
December 8, 2016: Acta Neuropathologica
https://www.readbyqxmd.com/read/27933272/autophagy-dependent-secretion-contribution-to-tumor-progression
#13
REVIEW
Tom G Keulers, Marco B E Schaaf, Kasper M A Rouschop
Autophagy is best known as a lysosomal degradation and recycling pathway to maintain cellular homeostasis. During autophagy, cytoplasmic content is recognized and packed in autophagic vacuoles, or autophagosomes, and targeted for degradation. However, during the last years, it has become evident that the role of autophagy is not restricted to degradation alone but also mediates unconventional forms of secretion. Furthermore, cells with defects in autophagy apparently are able to reroute their cargo, like mitochondria, to the extracellular environment; effects that contribute to an array of pathologies...
2016: Frontiers in Oncology
https://www.readbyqxmd.com/read/27933053/waste-conversion-into-n-caprylate-and-n-caproate-resource-recovery-from-wine-lees-using-anaerobic-reactor-microbiomes-and-in-line-extraction
#14
Leo A Kucek, Jiajie Xu, Mytien Nguyen, Largus T Angenent
To convert wastes into sustainable liquid fuels and chemicals, new resource recovery technologies are required. Chain elongation is a carboxylate-platform bioprocess that converts short-chain carboxylates (SCCs) (e.g., acetate [C2] and n-butyrate [C4]) into medium-chain carboxylates (MCCs) (e.g., n-caprylate [C8] and n-caproate [C6]) with hydrogen gas as a side product. Ethanol or another electron donor (e.g., lactate, carbohydrate) is required. Competitive MCC productivities, yields (product vs. substrate fed), and specificities (product vs...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27932944/role-of-homocysteine-in-the-ischemic-stroke-and-development-of-ischemic-tolerance
#15
REVIEW
Ján Lehotský, Barbara Tothová, Maria Kovalská, Dušan Dobrota, Anna Beňová, Dagmar Kalenská, Peter Kaplán
Homocysteine (Hcy) is a toxic, sulfur-containing intermediate of methionine metabolism. Hyperhomocysteinemia (hHcy), as a consequence of impaired Hcy metabolism or defects in crucial co-factors that participate in its recycling, is assumed as an independent human stroke risk factor. Neural cells are sensitive to prolonged hHcy treatment, because Hcy cannot be metabolized either by the transsulfuration pathway or by the folate/vitamin B12 independent remethylation pathway. Its detrimental effect after ischemia-induced damage includes accumulation of reactive oxygen species (ROS) and posttranslational modifications of proteins via homocysteinylation and thiolation...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27932039/anaerobic-digestion-of-nitrogen-rich-poultry-manure-impact-of-thermophilic-biogas-process-on-metal-release-and-microbial-resistances
#16
Reshma Anjum, Elisabeth Grohmann, Niclas Krakat
Poultry manure is a nitrogen rich fertilizer, which is usually recycled and spread on agricultural fields. Due to its high nutrient content, chicken manure is considered to be one of the most valuable animal wastes as organic fertilizer. However, when chicken litter is applied in its native form, concerns are raised as such fertilizers also include high amounts of antibiotic resistant pathogenic Bacteria and heavy metals. We studied the impact of an anaerobic thermophilic digestion process on poultry manure...
December 5, 2016: Chemosphere
https://www.readbyqxmd.com/read/27931827/selection-of-an-endogenous-2-3-butanediol-pathway-in-escherichia-coli-by-fermentative-redox-balance
#17
Keming Liang, Claire R Shen
Fermentative redox balance has long been utilized as a metabolic evolution platform to improve efficiency of NADH-dependent pathways. However, such system relies on the complete recycling of NADH and may become limited when the target pathway results in excess NADH stoichiometrically. In this study, endogenous capability of Escherichia coli for 2,3-butanediol (2,3-BD) synthesis was explored using the anaerobic selection platform based on redox balance. To address the issue of NADH excess associated with the 2,3-BD pathway, we devised a substrate-decoupled system where a pathway intermediate is externally supplied in addition to the carbon source to decouple NADH recycling ratio from the intrinsic pathway stoichiometry...
December 5, 2016: Metabolic Engineering
https://www.readbyqxmd.com/read/27931374/agricultural-waste
#18
Ling Xue, Panpan Zhang, Huajie Shu, Chein-Chi Chang, Renqing Wang, Shuping Zhang
In recent years, the quantity of agricultural waste has been rising rapidly all over the world. As a result, the environmental problems and negative impacts of agricultural waste are drawn more and more attention. Therefore, there is a need to adopt proper approaches to reduce and reuse agricultural waste. This review presented about 200 literatures published in 2015 relating to the topic of agricultural waste. The review examined research on agricultural waste in 2015 from the following four aspects: the characterization, reuse, treatment, and management...
October 2016: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/27929693/use-of-recycled-external-fixators-in-management-of-compound-injuries
#19
Swagat Mahapatra, Nandakumar Rengarajan
BACKGROUND: Compound fractures form a bulk of Orthopaedic Trauma cases in a developing country like India. External Fixation devices are the mainstays of treatment of these open fractures. They are generally used as a one use disposable device and add a great burden to the health care costs, especially in a developing country. In our study we evaluated the efficacy and complication rate of recycled external fixators with that of new external fixators. MATERIALS AND METHODS: This was a prospective randomised interventional study conducted in a tertiary care teaching hospital of a developing country...
December 8, 2016: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/27929083/applicability-of-drinking-water-treatment-residue-for-lake-restoration-in-relation-to-metal-metalloid-risk-assessment
#20
Nannan Yuan, Changhui Wang, Yuansheng Pei, Helong Jiang
Drinking water treatment residue (DWTR), a byproduct generated during potable water production, exhibits a high potential for recycling to control eutrophication. However, this beneficial recycling is hampered by unclear metal/metalloid pollution risks related to DWTR. In this study, the pollution risks of Al, As, Ba, Be, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, and Zn due to DWTR application were first evaluated for lake water based on human health risk assessment models and comparison of regulatory standards. The risks of DWTR were also evaluated for sediments on the basis of toxicity characteristics leaching procedure and fractionation in relation to risk assessment code...
December 8, 2016: Scientific Reports
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