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https://www.readbyqxmd.com/read/30316100/targeted-metabolomics-to-understand-the-association-between-arsenic-metabolism-and-diabetes-related-outcomes-preliminary-evidence-from-the-strong-heart-family-study
#1
Miranda J Spratlen, Maria Grau-Perez, Jason G Umans, Joseph Yracheta, Lyle G Best, Kevin Francesconi, Walter Goessler, Teodoro Bottiglieri, Mary V Gamble, Shelley A Cole, Jinying Zhao, Ana Navas-Acien
BACKGROUND: Inorganic arsenic exposure is ubiquitous and both exposure and inter-individual differences in its metabolism have been associated with cardiometabolic risk. A more efficient arsenic metabolism profile (lower MMA%, higher DMA%) has been associated with reduced risk for arsenic-related health outcomes. This profile, however, has also been associated with increased risk for diabetes-related outcomes. OBJECTIVES: The mechanism behind these conflicting associations is unclear; we hypothesized the one-carbon metabolism (OCM) pathway may play a role...
September 27, 2018: Environmental Research
https://www.readbyqxmd.com/read/30315588/hybrid-density-functional-study-on-the-electronic-structures-and-properties-of-p3ht-pbs-and-p3ht-cds-hybrid-interface-for-photovoltaic-applications
#2
Thao P Nguyen, Ji Hoon Shim
The efficiency of charge transport mainly depends on the interfacial energy level alignment between the conjugated polymer and the inorganic substrate. It provides an accurate understanding, predicting as well as controlling the optimal power conversion efficiency of various type of hybrid photovoltaic systems. In this article, we use hybrid functional (HSE06) to study the electronic structures and properties at the interface of poly(3-hexylthiophene)(P3HT)/CdS and P3HT/PbS for solar cell applications. We found that the dangling bonds at the inorganic surface introduce in-gap states and greatly reduce the device performance...
September 15, 2018: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/30315527/biological-and-chemical-compositions-of-atmospheric-particulate-matter-during-hazardous-haze-days-in-beijing
#3
Zhendong Guo, Zhongyi Wang, Lu'an Qian, Zongzheng Zhao, Chunmao Zhang, Yingying Fu, Jiaming Li, Cheng Zhang, Bing Lu, Jun Qian
Particulate matter (PM), a major air pollutant in Beijing in recent years, poses a formidable public health threat. Even through many studies have documented the chemical and biological characteristics of PM, less is known about these characteristics on hazardous haze days (Air Quality Index, AQI 301-500) and the difference with sunny or unhealthy haze day (AQI 151-200) characteristics. Herein, studies were performed during a red alert air pollution event (continuous hazardous haze days) and the first few days following the event (sunny days first and then unhealthy haze days) in Beijing from December 19 to 25, 2016...
October 12, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/30315316/discovery-of-several-novel-widespread-and-ecologically-distinct-marine-thaumarchaeota-viruses-that-encode-amoc-nitrification-genes
#4
Nathan A Ahlgren, Clara A Fuchsman, Gabrielle Rocap, Jed A Fuhrman
Much of the diversity of prokaryotic viruses has yet to be described. In particular, there are no viral isolates that infect abundant, globally significant marine archaea including the phylum Thaumarchaeota. This phylum oxidizes ammonia, fixes inorganic carbon, and thus contributes to globally significant nitrogen and carbon cycles in the oceans. Metagenomics provides an alternative to culture-dependent means for identifying and characterizing viral diversity. Some viruses carry auxiliary metabolic genes (AMGs) that are acquired via horizontal gene transfer from their host(s), allowing inference of what host a virus infects...
October 12, 2018: ISME Journal
https://www.readbyqxmd.com/read/30315082/a-novel-efflux-transporter-arsk-is-responsible-for-bacterial-resistance-to-arsenite-antimonite-trivalent-roxarsone-and-methylarsenite
#5
Kaixiang Shi, Chan Li, Christopher Rensing, Xingli Dai, Xia Fan, Gejiao Wang
Arsenic-resistant bacteria have evolved various efflux systems for arsenic resistance. Five arsenic efflux proteins, ArsB, Acr3, ArsP, ArsJ and MSF1, have been reported. In this study, comprehensive analyses were performed to study the function of a putative major facilitator superfamily gene arsK and the regulation of arsK transcriptional expression in Agrobacterium tumefaciens GW4. We found that (1) arsK is located on an arsenic gene island in strain GW4, ArsK orthologs are widely distributed in arsenic-resistant bacteria and are phylogenetically divergent from the five reported arsenic efflux proteins, indicating that it may be a novel arsenic efflux transporter; (2) Reporter gene assays showed that the expression of arsK was induced by arsenite [As(III)], antimonite [Sb(III)], trivalent roxarsone [Rox(III)], methylarsenite [MAs(III)] and arsenate [As(V)]; (3) Heterologous expression of ArsK in an arsenic-hypersensitive E...
October 12, 2018: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/30314375/enhanced-adsorption-performance-of-oxytetracycline-by-desugared-reed-residues
#6
Min Zhou, Tao Zhu, Xiaohua Fei
The performance of oxytetracycline adsorption by untreated reed roots, stems and leaves, as well as the desugared reed roots, stems and leaves, was investigated with scanning electron microscopy, Fourier-transform infrared spectroscopy, elemental analysis and surface area analysis to understand the adsorption mechanism. The results showed that the adsorption capacities of untreated reed were 416.35 mg/kg for roots, 341.92 mg/kg for stems and 280.21 mg/kg for leaves, and can be increased significantly by a factor of 8⁻12 after desugarization...
October 11, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/30314278/layered-expanded-mesostructured-silicas-generalized-synthesis-and-functionalization
#7
Pedro Burguete, José Manuel Morales, Lorenzo Fernández, Jamal El Haskouri, Julio Latorre, Carmen Guillem, Francisco Pérez-Pla, Ana Cros, Daniel Beltrán, Aurelio Beltrán, Pedro Amorós
Mesostructured layered silicas have been prepared through a surfactant-assisted procedure using neutral alkylamines as templates and starting from atrane complexes as hydrolytic inorganic precursors. By adjusting the synthetic parameters, this kinetically controlled reproducible one-pot method allows for obtaining both pure and functionalized (inorganic or organically) lamellar silica frameworks. These are easily deconstructed and built up again, which provides a simple way for expanding the interlamellar space...
October 11, 2018: Nanomaterials
https://www.readbyqxmd.com/read/30312926/engineered-nanomaterials-for-water-decontamination-and-purification-from-lab-to-products
#8
REVIEW
Shams Tabrez Khan, Abdul Malik
Clean water is vital for life; it is required not only for drinking but also for the preparation of food and proper hygiene. Unfortunately, more than fifty percent of the world population mainly in China and India face a severe scarcity of water. Around 1.8 billion people inevitably drink water from sources having fecal contamination resulting in the death of about a million children every year. Scientists are developing various economic technologies to decontaminate and purify water. Nanomaterials-based technology offers an economic and effective alternative for water purification and decontamination...
October 3, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/30312905/hybrid-inorganic-nonporous-silica-organic-alginate-core-shell-platform-for-targeting-a-cisplatin-based-pt-iv-anticancer-prodrug
#9
Mauro Ravera, Elisabetta Gabano, Diego Bonzani, Ilaria Zanellato, Aldo Arrais, Simone Cantamessa, Marco Biggiogera, Domenico Osella
Nonporous silica nanoparticles with an external shell containing the 3‑aminopropyl arm (SiNP) were further decorated with alginic acid (SiNP-ALG) as a potential biocompatible delivery system for Pt antitumor agents. Such particles were coupled with the prodrug (OC‑6‑44)‑acetato(β‑alaninato)diamminedichloridoplatinum(IV), 1, through the formation of amide bonds between the pendant carboxylate groups on SiNP-ALG and the free amino group of the complex. Cytosol extracted from tumor cells was able to quickly and efficiently reduce the Pt(IV) prodrug, and produces the active metabolite cisplatin...
October 2, 2018: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/30312869/digestion-performance-and-contributions-of-organic-and-inorganic-fouling-in-an-anaerobic-membrane-bioreactor-treating-waste-activated-sludge
#10
Akira Hafuka, Riho Mashiko, Ryuto Odashima, Hiroshi Yamamura, Hisashi Satoh, Yoshimasa Watanabe
This study evaluates the performance of an anaerobic membrane bioreactor (AnMBR) digesting waste activated sludge. A digestion reactor equipped with an external hollow fiber microfiltration membrane module was operated in continuous-mode for 248 days. The system demonstrated 56% volatile solids degradation at an organic loading rate of 0.40 g-VS/(L·d) in 15 days of hydraulic retention time. The average methane content in the biogas produced was 76% which is considerably high compared to that from a typical continuously stirred tank reactor...
October 2, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30312853/investigating-chemical-and-structural-instabilities-of-lead-halide-perovskite-induced-by-electron-beam-irradiation
#11
Xuanyu Chen, Zhiwei Wang
Chemical and structural instabilities of lead halide perovskites remain a major obstacle to their large-scale applications in photovoltaic solar cells and optoelectronic devices. Herein we report on a comparative investigation of electron beam irradiation effects on (all-inorganic) CsPbI3 and (organic-inorganic hybrid) CH3 NH3 PbI3 halide perovskite thin films by transmission electron microscopy. Upon continuous electron beam irradiation with high dose rates, CsPbI3 exhibits rather rapid morphological change and compositional degradation within irradiated regions, which are attributed to the radiolysis effect and probably assisted by electron beam heating and Coulomb forces...
September 22, 2018: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/30312796/peroxymonosulfate-activation-by-iron-iii-tetraamidomacrocyclic-ligand-for-degradation-of-organic-pollutants-via-high-valent-iron-oxo-complex
#12
Hongchao Li, Chao Shan, Wei Li, Bingcai Pan
Herein, we proposed a new catalytic oxidation system, i.e., iron(III)-tetraamidomacrocyclic ligand (FeIII -TAML) mediated activation of peroxymonosulfate (PMS), for highly efficient organic degradation using p-chlorophenol (4-CP) as a model one. PMS/FeIII -TAML is capable of degrading 4-CP completely in 9 min at the initial 4-CP of 50 μM and pH = 7, whereas the recently explored system, H2 O2 /FeIII -TAML, could only result in ∼22% 4-CP removal in 20 min under otherwise identical conditions. More attractively, inorganic anions (i...
October 6, 2018: Water Research
https://www.readbyqxmd.com/read/30312792/molecular-insights-into-the-mechanism-and-the-efficiency-structure-relationship-of-phosphorus-removal-by-coagulation
#13
Yong-Bao Chu, Min Li, Jin-Wei Liu, Wei Xu, Shi-Han Cheng, Hua-Zhang Zhao
Types and structures of phosphorus compounds influence the removal of phosphorus by coagulation. Until now, the molecular-level interaction between coagulants and phosphorus (especially organophosphates) and the relationship between removal efficiency and phosphorus structure have not been clear. This work investigated the removal of phosphorus with different structures using conventional coagulants (poly aluminum chloride (PACl) and polymerized ferric sulfate (PFS)) and a novel covalently-bound inorganic-organic hybrid coagulant (CBHyC)...
October 5, 2018: Water Research
https://www.readbyqxmd.com/read/30312769/long-chain-polyphosphate-in-osteoblast-matrix-vesicles-enrichment-and-inhibition-of-mineralization
#14
Lina Li, Mei Li Khong, Eric L H Lui, Saida Mebarek, David Magne, Rene Buchet, Julian A Tanner
BACKGROUND: Inorganic polyphosphate (polyP) is a fundamental and ubiquitous molecule in prokaryotes and eukaryotes. PolyP has been found in mammalian tissues with particularly high levels of long-chain polyP in bone and cartilage where critical questions remain as to its localization and function. Here, we investigated polyP presence and function in osteoblast-like SaOS-2 cells and cell-derived matrix vesicles (MVs), the initial sites of bone mineral formation. METHODS: PolyP was quantified by 4',6-diamidino-2-phenylindole (DAPI) fluorescence and characterized by enzymatic methods coupled to urea polyacrylamide gel electrophoresis...
October 9, 2018: Biochimica et biophysica acta. General subjects
https://www.readbyqxmd.com/read/30312759/iron-addiction-with-ferroptosis-resistance-in-asbestos-induced-mesothelial-carcinogenesis-toward-the-era-of-mesothelioma-prevention
#15
Shinya Toyokuni
Cancer is the primary cause of human mortality in most countries. This tendency has increased as various medical therapeutics have advanced, which suggests that we cannot escape carcinogenesis, although the final outcome may be modified by exposomes and statistics. Cancer is classified by its cellular differentiation. Mesothelial cells are distinct in that they line somatic cavities, facilitating the smooth movement of organs, but are not exposed to the external environment. Malignant mesothelioma, or simply mesothelioma, develops either in the pleural, peritoneal or pericardial cavities, or in the tunica vaginalis testes...
October 9, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/30312466/relative-bioavailability-of-l-lysine-sulfate-is-equivalent-to-that-of-l-lysine-hcl-for-nursery-piglets
#16
Jorge Y P Palencia, Maíra Resende, Marina A G Lemes, Melissa F S A Mendes, Sudário R Silva, Lyssa Otani, Allan P Schinckel, Márvio L T Abreu, Vinícius S Cantarelli
Supplementary l-lysine sources include l-lysine HCl and l-lysine sulfate. L-Lysine sulfate contains at least 50% l-Lys and other components as residues from the fermentation process, other amino acids, and other organic and inorganic substances, being an alternative to l-Lys HCl. The aim of this study was to evaluate the relative bioavailability (RBV) of l-Lys sulfate in comparison with l-Lys HCl and its effects on performance, blood parameters, intestinal functionality, and the apparent total tract digestibility in nursery piglets...
October 12, 2018: Journal of Animal Science
https://www.readbyqxmd.com/read/30311990/inorganic-triphenylphosphine
#17
Paul Pringle, Adam Gorman, Hazel Sparkes, Tom Young, Jonathan Bailey, Natalie Fey
A completely inorganic version of one of the most famous organophosphorus compounds, triphenylphosphine, has been prepared. A comparison of the crystal structures of inorganic triphenylphosphine, PBaz3 (where Baz = B3H2N3H3) and PPh3 shows that they have superficial similarities and furthermore, the Lewis basicities of the two compounds are remarkably similar. However, their oxygenation and hydrolysis reactions are starkly different. PBaz3 reacts quantitatively with water to give PH3 and with the oxidizing agent ONMe3 to give the triply-O-inserted product P(OBaz)3, an inorganic version of triphenylphosphite; a corresponding transformation with PPh3 is inconceivable...
October 12, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/30311703/shortening-of-apparent-transverse-relaxation-time-of-inorganic-phosphate-as-a-breast-cancer-biomarker
#18
Wybe J M van der Kemp, Tijl A van der Velden, Alexander M Schmitz, Kenneth G Gilhuijs, Peter R Luijten, Dennis W J Klomp, Jannie P Wijnen
Phosphorus MRS offers a non-invasive tool for monitoring cell energy and phospholipid metabolism and can be of additional value in diagnosing cancer and monitoring cancer therapy. In this study, we determined the transverse relaxation times of a number of phosphorous metabolites in a group of breast cancer patients by adiabatic multi-echo spectroscopic imaging at 7 T. The transverse relaxation times of phosphoethanolamine, phosphocholine, inorganic phosphate (Pi ), glycerophosphocholine and glycerophosphatidylcholine were 184 ± 8 ms, 203 ± 17 ms, 87 ± 8 ms, 240 ± 56 ms and 20 ± 10 ms, respectively...
October 12, 2018: NMR in Biomedicine
https://www.readbyqxmd.com/read/30310904/eurogels-a-ferromagnetic-semiconductor-with-a-porous-structure-prepared-via-the-assembly-of-hybrid-nanorods
#19
Bastian Trepka, Julian Stiegeler, Ilona Wimmer, Mikhail Fonin, Sebastian Polarz
EuO is unique, because it belongs to the few solids combining semiconducting properties (Egap = 1.1 eV) with native ferromagnetism. For future applications of EuO, e.g. as spin-filters or for sensors, one has to learn how defined nanostructures can be prepared. Unlike other ceramic oxides, there are no established soft-chemistry routes (e.g. sol-gel) towards EuO nanomaterials e.g. porous materials. This is due to the labile nature of the oxidation state Eu(+ii). We present a particle-based method leading to a EuO aerogel...
October 12, 2018: Nanoscale
https://www.readbyqxmd.com/read/30310868/secondary-building-units-as-the-turning-point-in-the-development-of-the-reticular-chemistry-of-mofs
#20
REVIEW
Markus J Kalmutzki, Nikita Hanikel, Omar M Yaghi
The secondary building unit (SBU) approach was a turning point in the discovery of permanently porous metal-organic frameworks (MOFs) and in launching the field of reticular chemistry. In contrast to the single-metal nodes known in coordination networks, the polynuclear nature of SBUs allows these structures to serve as rigid, directional, and stable building units in the design of robust crystalline materials with predetermined structures and properties. This concept has also enabled the development of MOFs with ultra-high porosity and structural complexity...
October 2018: Science Advances
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