keyword
MENU ▼
Read by QxMD icon Read
search

Mole

keyword
https://www.readbyqxmd.com/read/28741932/tailor-made-luminescent-polymers-through-unusual-metallophilic-interaction-arrays-au%C3%A2-%C3%A2-%C3%A2-au%C3%A2-%C3%A2-%C3%A2-ag%C3%A2-%C3%A2-%C3%A2-ag
#1
María Gil-Moles, M Concepción Gimeno, José M López-de-Luzuriaga, Miguel Monge, M Elena Olmos, David Pascual
A novel and efficient strategy for the synthesis of luminescent polymers bearing metallophilic interactions with unprecedented charge sequences has been designed. For this end suitable basic gold units such as [AuR2](-), bearing perhalophenyl derivatives, and dinuclear acid silver terpyridine species, [Ag2(terpy)2](CF3SO3)2, have been chosen. Their combination originates the polymeric derivatives [{AuR2}2Ag2(terpy)2]n (R = C6F5, C6Cl2F3) or [{Au(C6Cl5)2}Ag(terpy)]n. The change of the perhalophenyl group in the gold complex modulates the strength in the metallophilic contacts and, consequently, the polymer arrays and luminescent properties...
July 25, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28741183/reproduction-ageing-and-longevity-in-two-species-of-laboratory-rodents-with-different-life-histories
#2
Eugene Novikov, I Zadubrovskaya, P Zadubrovskiy, T Titova
Social subterranean rodents of the Bathyergidae family are known to have extended longevity and some signs of negligible senescence, although the manifestation of these traits depends on the reproductive status of individuals. Such enormous life history peculiarities are usually explained by the specificity of a subterranean way of life. If so, all subterranean rodents, regardless of their taxonomic position, are expected to have higher maximum lifespans and shorter senescence periods than the related above-ground species...
July 24, 2017: Biogerontology
https://www.readbyqxmd.com/read/28739271/purification-of-dirucotide-a-synthetic-17-aminoacid-peptide-by-ion-exchange-centrifugal-partition-chromatography
#3
Leslie Boudesocque, Luciano Forni, Agathe Martinez, Jean-Marc Nuzillard, Matthieu Giraud, Jean-Hugues Renault
Dirucotide is a synthetic drug candidate for the treatment of multiple sclerosis. This 17-aminoacid peptide was successfully purified by ion exchange centrifugal partition chromatography. The optimized conditions involved the biphasic methyl tert-butyl ether/acetonitrile/n-butanol/water (2:1:2:5, v/v) solvent system in the descending mode, the di(2-ethylhexyl)phosphoric acid cation-exchanger with an exchanger (di(2-ethylhexyl)phosphoric acid)/dirucotide mole ratio of 100 and Ca(2+) ions in aqueous solution as displacer...
July 15, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28738357/biphasically-modulating-the-activity-of-carboxypeptidase-g2-with-ultrasound
#4
Wanying Ma, Ying Zhang, Xueling Zheng, Tinghe Yu
BACKGROUND/AIMS: Carboxypeptidase G2 (CPG2) has been used for cancer prodrug therapy to realize the targeted release of active drugs, but there yet lacks a means to modulate the CPG2 activity. Here ultrasound was used to modulate the CPG2 activity. METHODS: The activity of insonated CPG2 was determined, and then underlying biochemical (i.e., monomer, dimer and conformation) and ultrasonic (i.e., heat and cavitation) mechanisms were explored. RESULTS: Ultrasound (1...
July 24, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28737185/rationalising-the-effects-of-ionic-liquids-on-a-nucleophilic-aromatic-substitution-reaction
#5
Rebecca R Hawker, Michaela J Wong, Ronald S Haines, Jason B Harper
The nucleophilic aromatic substitution reaction between 1-fluoro-2,4-dinitrobenzene and ethanol was examined in a series of ionic liquids across a range of mole fractions. Temperature-dependent kinetic analyses were undertaken to determine the activation parameters for this reaction at the highest mole fraction. As the mole fraction of ionic liquid was increased, the rate constant of the reaction also increased, however the microscopic origin of the rate enhancement was shown to be different between different ionic liquids and also between different solvent compositions...
July 24, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28737039/effect-of-solvent-quality-on-laminar-slip-flow-penetration-of-poly-n-isopropylacrylamide-films-with-an-exploration-of-the-mass-transport-mechanism
#6
Huan Wang, Jeanne E Pemberton
The effect of solvent quality on the slip flow penetration of polymer films was evaluated by monitoring small-molecule mass transport under varying laminar flow rates using Förster resonance energy transfer in combination with total internal reflectance fluorescence microscopy (FRET-TIRFM). For thin films of poly(N-isopropylacrylamide) (pNIPAM), solvents with solvent quality ranging from good to poor were studied. The solvents used were composed of varying mole ratios of methanol and water in order to take advantage of the unique cononsolvency phenomenon of pNIPAM such that differences in the physicochemical properties of these solvents were insignificant for fluorescence detection...
July 24, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28734478/ph-dependent-membrane-interactions-of-the-histidine-rich-cell-penetrating-peptide-lah4-l1
#7
Justine Wolf, Christopher Aisenbrey, Nicole Harmouche, Jesus Raya, Philippe Bertani, Natalia Voievoda, Regine Süss, Burkhard Bechinger
The histidine-rich designer peptide LAH4-L1 exhibits antimicrobial and potent cell-penetrating activities for a wide variety of cargo including nucleic acids, polypeptides, adeno-associated viruses, and nanodots. The non-covalent complexes formed between the peptide and cargo enter the cell via an endosomal pathway where the pH changes from neutral to acidic. Here, we investigated the membrane interactions of the peptide with phospholipid bilayers and its membrane topology using static solid-state NMR spectroscopy...
July 19, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28733212/the-peroxyl-radical-induced-oxidation-of-escherichia-coli-ftsz-and-its-single-tryptophan-mutant-y222w-modifies-specific-side-chains-generates-protein-cross-links-and-affects-biological-function
#8
Elizabeth Escobar-Álvarez, Fabian Leinisch, Gissela Araya, Octavio Monasterio, Lasse G Lorentzen, Eduardo Silva, Michael J Davies, Camilo López-Alarcón
FtsZ (filamenting temperature-sensitive mutant Z) is a key protein in bacteria cell division. The wild-type Escherichia coli FtsZ sequence (FtsZwt) contains three tyrosine (Tyr, Y) and sixteen methionine (Met, M) residues. The Tyr at position 222 is a key residue for FtsZ polymerization. Mutation of this residue to tryptophan (Trp, W; mutant Y222W) inhibits GTPase activity resulting in an extended time in the polymerized state compared to FtsZwt. Protein oxidation has been highlighted as a determinant process for bacteria resistance and consequently oxidation of FtsZwt and the Y222W mutant, by peroxyl radicals (ROO•) generated from AAPH (2,2'-azobis(2-methylpropionamidine) dihydrochloride) was studied...
July 18, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28732441/determination-of-the-residual-entropy-of-simple-mixtures-by-monte-carlo-simulation
#9
Eric Detmar, Simin Yazdi Nezhad, Ulrich K Deiters
Extensive Monte Carlo simulations were performed for (neon + krypton) mixtures for temperatures between 200 and 600 K and pressures up to 1 GPa, using Lennard-Jones potentials to describe the intermolecular interactions. The residual entropies were obtained via Widom's insertion method as well as by an integration technique. At high pressures, the residual entropy is, to a very good approximation, a linear function of 1/λ_a, the reciprocal value of the average Monte Carlo displacement parameter that gives the acceptance ratio "a" for translational moves...
July 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28732168/inland-sea-spray-aerosol-transport-and-incomplete-chloride-depletion-varying-degrees-of-reactive-processing-observed-during-soas
#10
Amy Lynne Bondy, Bingbing Wang, Alexander Laskin, Rebecca Lynn Craig, Manelisi Victor Nhliziyo, Steven Bertman, Kerri A Pratt, Paul B Shepson, Andrew P Ault
Multiphase reactions involving sea spray aerosol (SSA) impact trace gas budgets in coastal regions by acting as a reservoir for oxidized nitrogen and sulfur species, as well as a source of halogen gases (HCl, ClNO2, etc.). While most studies of multiphase reactions on SSA have focused on marine environments, far less is known about SSA transported inland. Herein, single particle measurements of SSA are reported at a site > 320 km from the Gulf of Mexico, with transport times of 7-68 h. Samples were collected during the Southern Oxidant and Aerosol Study (SOAS) in June-July 2013 near Centreville, Alabama...
July 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28731528/improving-succinate-productivity-by-engineering-a-cyanobacterial-co2-concentrating-system-ccm-in-escherichia-coli
#11
Mengyong Xiao, Xinna Zhu, Changhao Bi, Yanhe Ma, Xueli Zhang
Biologically fixation of CO2 has great potential as a significant carbon source for biosynthesis, which is also a major way to reduce CO2 accumulation in atmosphere. Phosphoenolpyruvate (PEP) carboxylation is the key step of anaerobic succinate production in Escherichia coli. In this reaction, one mole CO2 is assimilated with PEP to form oxaloacetate by PEP carboxykinase (PCK). The preferred substrate of PCK is CO2 , which is very limited in cytoplasm. In this study, the carbon concentration mechanism (CCM) of cyanobacteria was introduced into E...
July 21, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28726675/sensitivity-of-magnetic-properties-to-chemical-pressure-in-lanthanide-garnets-i-ln-i-sub-3-sub-i-a-i-sub-2-sub-i-x-i-sub-3-sub-o-sub-12-sub-i-ln-i-gd-tb-dy-ho-i-a-i-ga-sc-in-te-i-x-i-ga-al-li
#12
Paromita Mukherjee, Alice C Sackville Hamilton, Hugh F J Glass, S E Dutton
A systematic study of the structural and magnetic properties of three-dimensionally frustrated lanthanide garnets <i>Ln</i><sub>3</sub><i>A</i><sub>2</sub><i>X</i><sub>3</sub>O<sub>12</sub>, <i>Ln</i> = Gd, Tb, Dy, Ho, <i>A</i> = Ga, Sc, In, Te, <i>X</i> = Ga, Al, Li is presented. Garnets with <i>Ln</i> = Gd show magnetic behaviour consistent with isotropic Gd<sup>3+</sup> spins; no magnetic ordering is observed for <i>T</i> ≥ 0...
July 20, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28726411/temperature-dependent-partitioning-of-c152-in-binary-phosphatidylcholine-membranes-and-mixed-phosphatidylcholine-phosphatidylethanolamine-membranes
#13
Christine A Gobrogge, Victoria A Kong, Robert Allan Walker
Time-resolved fluorescence and differential scanning calorimetry were used to determine the partitioning of coumarin 152 (C152) into large unilamellar vesicles composed of binary mixtures of two phosphatidylcholines (12:0/12:0 DLPC and 14:0/14:0 DMPC) and vesicles composed of binary mixtures of a phosphatidylcholine and a phosphatidylethanolamine (14:0/14:0 DMPC and 14:0/14:0 DMPE). Differential scanning calorimetry showed that both DLPC/DMPC and DMPC/DMPE are miscible in lipid vesicles. Time-resolved fluorescence indicated that C152 partitioning into DLPC/DMPC mixtures showed nearly ideal behavior that was described with weighted contributions from C152 partitioning into pure DLPC and pure DMPC vesicles...
July 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28724998/effect-of-defects-controlled-by-preparation-condition-and-heat-treatment-on-the-ferromagnetic-properties-of-few-layer-graphene
#14
Qinghua Miao, Lidong Wang, Zhaoyuan Liu, Bing Wei, Jinhui Wang, Xiangli Liu, Weidong Fei
Magnetism in graphene has stimulated extensive studies to search for novel metal-free magnetic device. In this paper, we use a synthesis method far from equilibrium state named self-propagating high temperature synthesis (SHS) to produce few-layer graphene with different defect contents and then use a heat treatment process (vacuum-annealing and air-cooling) to further control the defects in graphene. We find that the type and content of defects in graphene can be controlled by adjusting the mole ratio of reactants (Mg: CaCO3) for SHS reaction and the temperature of the subsequent heat treatment...
July 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28722130/solubility-and-molecular-interactions-of-ferulic-acid-in-various-isopropanol%C3%A2-%C3%A2-water-mixtures
#15
Nazrul Haq, Nasir A Siddiqui, Faiyaz Shakeel
OBJECTIVE: The solubility of an herbal compound ferulic acid (FA) in various (isopropanol (IPA) + water) mixtures was measured and correlated at temperatures 'T = 298.2 K to 318.2 K' and pressure 'p = 0.1 MPa'. METHODS: The experimental solubilities of FA in mole fraction were determined using a static equilibrium method and correlated with 'Apelblat, Van't Hoff, Yalkowsky and Jouyban-Acree models'. KEY FINDINGS: The maximum mole fraction solubilities of FA were obtained in neat IPA (2...
July 19, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28715484/multiple-renal-cancer-susceptibility-polymorphisms-modulate-the-hif-pathway
#16
Steffen Grampp, Virginia Schmid, Rafik Salama, Victoria Lauer, Franziska Kranz, James L Platt, James Smythies, Hani Choudhry, Margarete Goppelt-Struebe, Peter J Ratcliffe, David R Mole, Johannes Schödel
Un-physiological activation of hypoxia inducible factor (HIF) is an early event in most renal cell cancers (RCC) following inactivation of the von Hippel-Lindau tumor suppressor. Despite intense study, how this impinges on cancer development is incompletely understood. To test for the impact of genetic signals on this pathway, we aligned human RCC-susceptibility polymorphisms with genome-wide assays of HIF-binding and observed highly significant overlap. Allele-specific assays of HIF binding, chromatin conformation and gene expression together with eQTL analyses in human tumors were applied to mechanistic analysis of one such overlapping site at chromosome 12p12...
July 17, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28715012/the-properties-of-residual-water-molecules-in-ionic-liquids-a-comparison-between-direct-and-inverse-kirkwood-buff-approaches
#17
Takeshi Kobayashi, Joshua E S J Reid, Seishi Shimizu, Maria Fyta, Jens Smiatek
We study the properties of residual water molecules at different mole fractions in dialkylimidazolium based ionic liquids (ILs), namely 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIM/BF4) and 1-butyl-3-methylimidazolium tetrafluoroborate (BMIM/BF4) by means of atomistic molecular dynamics (MD) simulations. The corresponding Kirkwood-Buff (KB) integrals for the water-ion and ion-ion correlation behavior are calculated by a direct evaluation of the radial distribution functions. The outcomes are compared to the corresponding KB integrals derived by an inverse approach based on experimental data...
July 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28714510/radical-reactions-of-diamine-bis-phenolate-vanadium-iii-complexes-solid-state-binding-of-o2-to-form-a-vanadium-v-peroxo-complex
#18
Sónia Barroso, Ana M Coelho, Pedro Adão, Maria José Calhorda, Ana M Martins
[VCl3(THF)3] reacted with the sodium salt of a tripodal diamine bisphenolate ligand precursor Na2L2 to give a paramagnetic d(2) complex [V(L2)Cl] (2). The reaction of 2 with oxygen is strongly dependent on the experimental conditions, affording [VO(L2)Cl] (6) or [V(η(2)-O2)(L2)Cl] (7). The formation of 7 involves the direct addition of O2 to V(iii) in the solid state with oxidation to V(v) without significantly disturbing the structure of 2. DFT calculations showed that compound 7 is an intermediate in the formation of 6 from 2...
July 17, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28713902/establishment-and-characterization-of-cell-lines-derived-from-complete-hydatidiform-mole
#19
Eiko Yamamoto, Kaoru Niimi, Tohru Kiyono, Toshimichi Yamamoto, Kimihiro Nishino, Kenichi Nakamura, Tomomi Kotani, Hiroaki Kajiyama, Kiyosumi Shibata, Fumitaka Kikkawa
Gestational trophoblastic diseases (GTDs) are a group of diseases characterized by abnormal cellular proliferation of atypical trophoblasts. A hydatidiform mole is an abnormal pregnancy caused by genetic fertilization disorders, and it can be classified as a complete hydatidiform mole (CHM) or a partial hydatidiform mole. The aim of this study was to establish cell lines from CHMs and to characterize the cells for future studies concerning GTD. HMol1-2C, HMol1-3B, HMol1-8 and HMol3-1B were established from primary cultures of CHM explants following the introduction of different combinations of genes including human telomerase reverse transcriptase (hTERT), a mutant form of CDK (CDK4R24C), cyclin D1, p53C234, MYC and HRAS...
July 14, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28713204/efficient-nh3-scr-removal-of-nox-with-highly-ordered-mesoporous-wo3-%C3%AF-ceo2-at-low-temperatures
#20
Sihui Zhan, He Zhang, Yu Zhang, Qiang Shi, Yi Li, XiuJun Li
To eliminate nitrogen oxides (NOx), a series of highly ordered mesoporous WO3(χ)-CeO2 nanomaterials (χ represents the mole ratio of W/Ce) were synthesized by using KIT-6 as a hard template, which was used for selective catalytic reduction (SCR) to remove NOx with NH3 at low temperatures. Moreover, the nanomaterials were characterized by TEM, XRD, Raman, XPS, BET, H2-TPR, NH3-TPD and in situ DRIFTS. It can be found that all of the prepared mesoporous WO3(χ)-CeO2 (χ = 0, 0.5, 0.75, 1 and 1.25) showed highly ordered mesoporous channels...
April 2017: Applied Catalysis. B, Environmental
keyword
keyword
13825
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"