keyword
MENU ▼
Read by QxMD icon Read
search

Exchange

keyword
https://www.readbyqxmd.com/read/28738639/a-colorimetric-indicator-displacement-assay-for-cysteine-sensing-based-on-a-molecule-exchange-mechanism
#1
Zhonghua Xue, Xiaoxia Fu, Honghong Rao, Mohammed Hassan Ibrahim, Lulu Xiong, Xiuhui Liu, Xiaoquan Lu
In this study, we developed an ingenious yet effective strategy for cysteine detection. The colorimetric cysteine assay is established through an indicator displacement process, where Cu(2+) and pyrocatechol violet (PV) was employed as receptor and indicator, respectively. Proof-of-concept trials demonstrated that the stronger binding affinity of Cu(2+) receptor toward cysteine than PV indicator endowed our colorimetric sensor with high selectivity and excellent sensitivity as well as with a lower detection limit (4...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738614/in-situ-synthesis-of-reduced-graphene-oxide-gold-nanoparticles-modified-electrode-for-speciation-analysis-of-copper-in-seawater
#2
Ming Liu, Dawei Pan, Wen Pan, Yun Zhu, Xueping Hu, Haitao Han, Chenchen Wang, Dazhong Shen
In this paper, reduced graphene oxide/gold nanoparticle/Nafion (rGO/AuNP/Nafion) modified electrode was fabricated through in-situ synthesis and used for determination of copper ions in strong salt electrolyte (0.5M NaCl) by differential pulse anodic stripping voltammetry (DPASV). This in-situ synthesis procedure was based on the ion-exchange and electrochemical reduction. The use of rGO provided a larger electrode surface and the presence of more active sites, while electron transfer was accelerated by incorporating AuNPs...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738416/conditionally-immortal-slc4a11-mouse-corneal-endothelial-cell-line-recapitulates-disrupted-glutaminolysis-seen-in-slc4a11-mouse-model
#3
Wenlin Zhang, Diego G Ogando, Edward T Kim, Moon-Jung Choi, Hongde Li, Jason M Tenessen, Joseph A Bonanno
Purpose: To establish conditionally immortal mouse corneal endothelial cell lines with genetically matched Slc4a11+/+ and Slc4a11-/- mice as a model for investigating pathology and therapies for SLC4A11 associated congenital hereditary endothelial dystrophy (CHED) and Fuchs' endothelial corneal dystrophy. Methods: We intercrossed H-2Kb-tsA58 mice (Immortomouse) expressing an IFN-γ dependent and temperature-sensitive mutant of the SV40 large T antigen (tsTAg) with Slc4a11+/+ and Slc4a11-/- C57BL/6 mice...
July 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28738393/estrogen-and-environmental-enrichment-differentially-affect-neurogenesis-dendritic-spine-immunolabeling-and-synaptogenesis-in-the-hippocampus-of-young-and-reproductively-senescent-female-rats
#4
Tina Sager, Michael Kashon, Kristine Krajnak
<br>Background: Studies examining the ability of estrogen replacement therapy (ERT) to enhance memory in women, and in animal models, have not produced consistent results. However, studies examining the effects of activity and exposure to novel environments consistently find enhancement of memory. METHODS: An animal model of reproductive aging was used to determine if estradiol (E2) replacement, activity, and/or exposure to an enriched environment could act synergistically to improve memory, and neural correlates of memory...
July 24, 2017: Neuroendocrinology
https://www.readbyqxmd.com/read/28738320/meeting-report-emerging-concepts-in-cell-organization
#5
David Teis, Wanda Kukulski
New concepts in cell organization emerged in a medieval castle during a snowy week in January 2017 in the middle of the Austrian Alps. The occasion was the 10th Annaberg EMBO workshop in Goldegg am See; organized by Gabriele Seethaler, Catherine Rabouille and Marino Zerial. There were 95 participants, including many who gave talks and presented posters, enjoying a familial and trusting atmosphere that stimulated lively exchange of (unpublished) results, new ideas and thoughts.
July 15, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28738157/calculations-of-n-%C3%A2-%C3%AF-%C3%A2-transition-energies-comparisons-between-td-dft-adc-cc-caspt2-and-bse-gw-descriptions
#6
Cloé Azarias, Chloé Habert, Simon Budzak, Xavier Blase, Ivan Duchemin, Denis Jacquemin
Using a large panel of theoretical approaches, i.e., CC2, CCSD, CCSDR(3), CC3, ADC(2), ADC(3), CASPT2, TD-DFT and BSE/evGW, the two latter combined with different exchange-correlation functionals, we investigated the lowest singlet transition in twenty-three n-pi* compounds based on the nitroso, thiocarbonyl, carbonyl and diazo chromophores. First, for sixteen small derivatives we compare the transition energies provided by the different wavefunction approaches to define theoretical best estimates. For this set, it surprisingly turned out that ADC(2) offers a better match with CC3 than ADC(3)...
July 24, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28737905/metabolism-of-t-2-toxin-in-farm-animals-and-human-in-vitro-and-in-chickens-in-vivo-using-ultra-high-performance-liquid-chromatography-quadrupole-time-of-flight-hybrid-mass-spectrometry-along-with-online-hydrogen-deuterium-exchange-technique
#7
Shupeng Yang, Marthe De Boevre, Huiyan Zhang, Karl De Ruyck, Feifei Sun, Jinzhen Zhang, Yue Jin, Yanshen Li, Zhanhui Wang, Suxia Zhang, Jinhui Zhou, Yi Li, Sarah De Saeger
After incubated with animals' and human liver microsomes, metabolites of phase I and II were investigated. A comparison was performed by ultrahigh performance liquid chromatography-quadrupole/time-of-flight coupled to mass spectrometry (UHPLC-Q/TOF). Consequently, a total of four phase I metabolites and three glucuronide binding metabolites of T-2 toxin were discovered. Although a significant metabolic difference was observed among six species, HT-2 toxin was the major product in all species. In addition, the in vivo metabolism of T-2 toxin after oral administration was also investigated in chickens, In total, 18 metabolites were detected, of which 13 were novel, to our knowledge, and reported for the first time...
July 24, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28737842/network-meta-analysis-of-disconnected-networks-how-dangerous-are-random-baseline-treatment-effects
#8
Audrey Béliveau, Sarah Goring, Robert W Platt, Paul Gustafson
In network meta-analysis, the use of fixed baseline treatment effects (a priori independent) in a contrast-based approach is regularly preferred to the use of random baseline treatment effects (a priori dependent). That is because, often, there is not aneed to model baseline treatment effects which carries the risk of model misspecification. However, in disconnected networks, fixed baseline treatment effects do not work (unless extra assumptions are made) as there is not enough information in the data to update the prior distribution on the contrasts between disconnected treatments...
July 24, 2017: Research Synthesis Methods
https://www.readbyqxmd.com/read/28737821/structure-and-reactivity-of-ru-ii-terpy-n-n-cl-cl-complexes-consequences-for-biological-applications
#9
Marta Chrzanowska, Anna Katafias, Olga Impert, Anna Kozakiewicz, Andrzej Surdykowski, Paulina Brzozowska, Alicja Franke, Achim Zahl, Ralph Puchta, Rudi van Eldik
The crystal structures of [Ru(II)(terpy)(bipy)Cl]Cl·2H2O and [Ru(II)(terpy)(en)Cl]Cl·3H2O, where terpy = 2,2':6',2''-terpyridine, bipy = 2,2'-bipyridine and en = ethylenediamine, were determined and compared to the structure of the complexes in solution obtained by multi-nuclear NMR spectroscopy in DMSOd-6 as a solvent. In aqueous solution, both chlorido complexes aquate fully to the corresponding aqua complexes, viz. [Ru(II)(terpy)(bipy)(H2O)](2+) and [Ru(II)(terpy)(en)(H2O)](2+), within ca. 2 h and ca. 2 min at 37 °C, respectively...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737797/cation-distribution-dependent-magnetic-properties-in-cocr2-xfexo4-x-0-1-to-0-5-exafs-m%C3%A3-ssbauer-and-magnetic-measurements
#10
D Kumar, A Banerjee, A Mahmoud, Chandana Rath
In this report, we have examined the evolution of the structure and rich magnetic transitions such as a paramagnetic to ferrimagnetic phase transition at the Curie temperature (TC), spiral ordering temperature (TS) and lock-in temperature (TL) observed in the CoCr2O4 spinel multiferroic after substituting Fe. The crystal structure, microstructure and cation distribution among the tetrahedral (A) and octahedral (B) sites in the spinel lattice are characterised by X-ray diffraction, transmission electron microscopy, Extended X-ray Absorption Fine Structure (EXAFS) and Mössbauer spectroscopy...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737787/coming-full-circle-constructing-a-gd6-wheel-dimer-by-dimer-and-the-importance-of-spin-topology
#11
Thomas N Hooper, Stuart K Langley, Silvia Gómez-Coca, Giulia Lorusso, Eliseo Ruiz, Keith S Murray, Marco Evangelisti, Euan K Brechin
The syntheses, structures, magnetic and thermodynamic properties of three related triethanolamine-based Gd(III) complexes are described. The smallest, a dimer ([Gd2]), can be viewed as the subunit from which the two larger complexes, a linear tetramer ([Gd2]2) and a cyclic hexamer ([Gd2]3), are composed by further deprotonation of the triethanolamine ligand. In all cases, nearest neighbour magnetic ions are weakly correlated by antiferromagnetic isotropic exchange, whose strength does not change significantly from one complex to another; J ranging from -0...
July 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28737781/synthesis-of-hollow-cu1-8s-nano-cubes-for-electromagnetic-interference-shielding
#12
Wanchun Jiang, Fan Wu, Yijun Jiang, Mengxiao Sun, Kun Zhang, Yilu Xia, Derong Wang, Aming Xie
The applications of inorganic semiconductor nano-structures as electromagnetic interference (EMI) shielding materials have been scarcely researched. Herein, we have designed hollow Cu1.8S nano-cubes via a mild anion exchange and etching process. These 30 wt% hollow Cu1.8S nano-cubes loaded in wax can display 30 dB of EMI shielding effectiveness (SE) in the whole tested frequency range of 2-18 GHz with a sample thickness of only 1 mm. This good EMI shielding performance can be attributed to the high electric conductivity, which leads to a high dielectric constant...
July 24, 2017: Nanoscale
https://www.readbyqxmd.com/read/28737777/post-synthetic-transformation-of-a-zn-ii-polyhedral-coordination-network-into-a-new-supramolecular-isomer-of-hkust-1
#13
Yao Chen, Lukasz Wojtas, Shengqian Ma, Michael J Zaworotko, Zhenjie Zhang
A Zn-based porphyrin containing metal-organic material (porphMOM-1) was transformed into a novel Cu-based porphyrin-encapsulating metal-organic material (porph@HKUST-1-β) via a one-pot post-synthetic modification (PSM) process involving both metal ion exchange and linker installation of trimesic acid. HKUST-1-β is the first example of yao topology and is to our knowledge the first supramolecular isomer of the archetypal coordination network HKUST-1.
July 24, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28737772/cortical-forces-and-cdc-42-control-clustering-of-par%C3%A2-proteins-for-caenorhabditis-elegans-embryonic%C3%A2-polarization
#14
Shyi-Chyi Wang, Tricia Yu Feng Low, Yukako Nishimura, Laurent Gole, Weimiao Yu, Fumio Motegi
Cell polarization enables zygotes to acquire spatial asymmetry, which in turn patterns cellular and tissue axes during development. Local modification in the actomyosin cytoskeleton mediates spatial segregation of partitioning-defective (PAR) proteins at the cortex, but how mechanical changes in the cytoskeleton are transmitted to PAR proteins remains elusive. Here we uncover a role of actomyosin contractility in the remodelling of PAR proteins through cortical clustering. During embryonic polarization in Caenorhabditis elegans, actomyosin contractility and the resultant cortical tension stimulate clustering of PAR-3 at the cortex...
July 24, 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28737717/synthesis-and-ion-exchange-properties-of-graphene-th-iv-phosphate-composite-cation-exchanger-its-applications-in-the-selective-separation-of-lead-metal-ions
#15
Tauseef Ahmad Rangreez, Abdullah M Asiri, Basma G Alhogbi, Mu Naushad
In this study, graphene Th(IV) phosphate was prepared by sol-gel precipitation method. The ion-exchange behavior of this cation-exchanger was studied by investigating properties like ion-exchange capacity for various metal ions, the effect of eluent concentration, elution behavior, and thermal effect on ion-exchange capacity (IEC). Several physicochemical properties as Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) study, thermal studies, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) studies were also carried out...
July 24, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28737623/an-observational-study-of-severe-pertussis-in-100-infants-%C3%A2-120-days-of-age
#16
James D Cherry, Kristen Wendorf, Brooke Bregman, Deborah Lehman, Delma Nieves, John S Bradley, Wilbert H Mason, Linette Sande-Lopez, Merrick Lopez, Myke Federman, Tempe Chen, Dean Blumberg, Samantha Johnston, Hayden T Schwenk, Peggy Weintrub, Kevin K Quinn, Kathleen Winter, Kathleen Harriman
BACKGROUND: Pertussis in young infants is a unique, severe, afebrile, cough illness that is frequently fatal. METHODS: All pertussis cases ≤ 120 days of age admitted to a pediatric intensive care unit (PICU) in California between October 1, 2013 and April 25, 2015 were evaluated. RESULTS: Of 100 pertussis patients ≤ 120 days of age admitted to PICU's, there were 5 deaths. The white blood cell (WBC) counts in the fatal cases were significantly higher than in the non-fatal cases...
July 20, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28737379/an-enzyme-free-dna-circuit-assisted-graphene-oxide-enhanced-fluorescence-anisotropy-assay-for-microrna-detection-with-improved-sensitivity-and-selectivity
#17
Shu Jun Zhen, Xue Xiao, Chun Hong Li, Cheng Zhi Huang
Graphene oxide (GO) has been proven as an outstanding fluorescence anisotropy (FA) amplifier. But the traditional GO amplified FA assays lack high sensitivity because of the 1:1 binding ratio between target and dye-modified probe. Herein, we report a new target-catalyzed hairpin assembly (CHA), an enzyme-free DNA circuit, assisted GO amplified FA strategy for microRNA-21 (miRNA-21) detection. In the presence of miRNA-21, the CHA was initiated and plenty of H1-H2 duplexes were produced continuously. The obtained H1-H2 duplex could induce the formation of a H1-H2-probe DNA (pDNA) complex by the toehold-mediated strand exchange reaction, which led the dye-modified pDNA to leave away from the GO surface, resulting in a decreased FA of the system...
July 24, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28737219/impacts-of-hydraulic-redistribution-on-grass-tree-competition-vs-facilitation-in-a-semi-arid-savanna
#18
Greg A Barron-Gafford, Enrique P Sanchez-Cañete, Rebecca L Minor, Sean M Hendryx, Esther Lee, Leland F Sutter, Newton Tran, Elizabeth Parra, Tony Colella, Patrick C Murphy, Erik P Hamerlynck, Praveen Kumar, Russell L Scott
A long-standing ambition in ecosystem science has been to understand the relationship between ecosystem community composition, structure and function. Differential water use and hydraulic redistribution have been proposed as one mechanism that might allow for the coexistence of overstory woody plants and understory grasses. Here, we investigated how patterns of hydraulic redistribution influence overstory and understory ecophysiological function and how patterns vary across timescales of an individual precipitation event to an entire growing season...
July 24, 2017: New Phytologist
https://www.readbyqxmd.com/read/28737078/effect-heating-dwell-time-has-on-the-retention-of-heavy-metals-in-the-structure-of-lightweight-aggregates-manufactured-from-wastes
#19
Beatriz González-Corrochano, Jacinto Alonso-Azcárate, Luis Rodríguez, Agripino Pérez Lorenzo, María Fernández Torío, Juan José Tejado Ramos, María Dolores Corvinos, Carlos Muro
The main objective of this paper was to study how effective thermal treatment is in the retention of different heavy metals (HMs) within the structure of artificial lightweight aggregates (LWAs). These LWAs were manufactured by washing aggregate sludge and sewage sludge. The consequence of increasing the heating dwell time whilst manufacturing these LWAs was also determined. Partitioning of the HMs (Cr, Ni, Cu, Zn, Cd and Pb) in both the waste raw materials and in the LWAs was studied by means of the optimized BCR sequential extraction procedure with lithium metaborate in the final fusion...
July 24, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28736951/component-customizable-porous-rare-earth-based-colloidal-spheres-towards-highly-effective-catalysts-and-bioimaging-applications
#20
Cheng Chao Li, Xianhong Rui, Weifeng Wei, Libao Chen
Multicomponent porous colloidal spheres are of interest because they not only show a combination of the properties associated with all different components, but also usually present synergy effect. However, combination of different components in a single porous sphere is still greatly challenged due to different precipitation behaviors of each component. In this work, we have developed a general synthetic route to prepare several categories of porous monodisperse RE-based colloidal spheres with customizable elemental compositions and uniform element distribution...
July 23, 2017: Chemistry: a European Journal
keyword
keyword
12593
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"