keyword
MENU ▼
Read by QxMD icon Read
search

Character strengths

keyword
https://www.readbyqxmd.com/read/27906492/taming-metal-fluorine-carbenoids
#1
Sebastian Molitor, Kai-Stephan Feichtner, Viktoria H Gessner
While Li/Cl carbenoids are versatile reagents in organic synthesis, the controlled handling of the extremely reactive and labile M/F carbenoids remains a challenge. We now show that even these compounds can be stabilized and isolated in solid state as well as in solution. Particularly the sodium and potassium com¬pounds exhibit a remarkable stability, thus allowing the first isolation of a room temperature stable fluorine carbenoid. Spectro¬scopic as well as DFT studies confirm the pronounced carbenoid character, showing M-F-C interactions with elongated C-F bonds...
December 1, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27906483/electrochemical-oxidation-and-radical-cations-of-structurally-non-rigid-hypervalent-silatranes-theoretical-and-experimental-studies
#2
Valery Fedorovich Sidorkin, Elena Fedorovna Belogolova, Yu Wang, Viatcheslav Jouikov, Evgeniya Pavlovna Doronina
Using 18 silatranes XSi(OCH2CH2)3N (1) as an example, the potentials of electrochemical oxidation E0 of the hypervalent compounds of Si were calculated for the first time at the ab initio and DFT levels. The experimental peak potentials Ep show an excellent agreement (MAE = 0.03) with the MP2//B3PW91 calculated E0 (C-PCM). Radical cations of 1 reveal a "stretch isomerism" of the NSi dative bond. Localization of the spin density (SD) on the substituent X and the short (s) coordination contact Si…N (dSiN < 2...
December 1, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27905598/dehydro-oxazole-thiazole-and-imidazole-radicals-insights-into-the-electronic-structure-stability-and-reactivity-aspects
#3
Anamika Mukhopadhyay, Lilit Jacob, Sugumar Venkataramani
DFT (U)B3LYP/cc-pVTZ and (U)M06-2X/cc-pVTZ and multireference CASSCF/cc-pVTZ level of theories have been used to investigate the electronic structure of isomeric dehydrooxazole (1b-d, 3 isomers), dehydrothiazole (2b-d, 3 isomers) and dehydroimidazole (3a-d, 4 isomers) radicals. The ground state electronic structure of each radical isomer has been confirmed by predicting their doublet excited state structure and calculating the adiabatic energy difference. The stability order of the individual isomeric radicals has been estimated through the comparison of absolute energies...
December 1, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27904396/moisture-sensitivity-optical-mechanical-and-structural-properties-of-whey-protein-based-edible-films-incorporated-with-rapeseed-oil
#4
Sabina Galus, Justyna Kadzińska
The objective of this work is to study the effect of the rapeseed oil content on the physical properties of whey protein emulsion films. For this purpose, whey protein films with the addition of 0, 1, 2 and 3% of rapeseed oil, and glycerol as a plasticizer were obtained by the casting method. Film-forming emulsions were evaluated and compared using light scattering granulometry. The Sauter mean diameters (d32) of lipid droplets in film-forming solutions showed an increasing trend when increasing the oil volume fractions...
March 2016: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/27894688/dna-and-chromosomal-damage-in-medical-workers-exposed-to-anaesthetic-gases-assessed-by-the-lymphocyte-cytokinesis-block-micronucleus-cbmn-assay-a-critical-review
#5
REVIEW
Pavel Vodicka, Ludovit Musak, Giovanni Fiorito, Veronika Vymetalkova, Ludmila Vodickova, Alessio Naccarati
The lymphocyte cytokinesis-block micronucleus (CBMN) assay has been applied in hundreds of in vivo biomonitoring studies of humans exposed either environmentally or occupationally to genotoxic chemicals. However, there is an emerging need to re-evaluate the use of MN and other biomarkers within the lymphocyte CBMN cytome assay as quantitative indicators of exposure to main classes of chemical genotoxins. The main aim of the present report is to systematically review published studies investigating the use of the lymphocyte CBMN assay to determine DNA damage in subjects exposed to anaesthetic gases...
October 2016: Mutation Research
https://www.readbyqxmd.com/read/27889363/new-tools-for-the-hydromorphological-assessment-and-monitoring-of-european-streams
#6
M Rinaldi, B Belletti, M Bussettini, F Comiti, B Golfieri, B Lastoria, E Marchese, L Nardi, N Surian
Hydromorphological stream assessment has significantly expanded over the last years, but a need has emerged from recent reviews for more comprehensive, process-based methods that consider the character and dynamics of the river with greater accuracy. With this as a focus, a series of hydromorphological tools have been developed and/or further extended in Europe within the context of the REFORM (REstoring rivers FOR effective catchment Management) project. The aim of this paper is to present the set of REFORM hydromorphological assessment methods and, based on some examples of their application, to illustrate and discuss their synergic use, specific features, limitations and strengths...
November 23, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27886325/the-intrinsic-strength-of-the-halogen-bond-electrostatic-and-covalent-contributions-described-by-coupled-cluster-theory
#7
Vytor Oliveira, Elfi Kraka, Dieter Cremer
36 halogen-bonded complexes YXARm (X: F, Cl, Br; Y: donor group; ARm acceptor group) have been investigated at the CCSD(T)/aug-cc-pVTZ level of theory. Binding energies, geometries, NBO charges, charge transfer, dipole moments, electrostatic potential, electron and energy density distributions, difference density distributions, vibrational frequencies, local stretching and bending force constants, and relative bond strength orders n have been calculated and used to order the halogen bonds according to their intrinsic strength...
November 25, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27852454/characterization-of-poly-allylamine-as-a-polymeric-ligand-for-ion-exchange-protein-chromatography
#8
Ming Li, Yanying Li, Linling Yu, Yan Sun
This work reports poly(allylamine) (PAA), as a polymeric ion-exchange ligand for protein chromatography. Sepharose FF was modified with PAA, and six anion exchangers with ionic capacities (ICs) from 165 to 618mmol/L were prepared. Inverse size exclusion chromatography, adsorption equilibrium, uptake kinetics and column elution were performed. It was found that both the adsorption capacity and effective diffusivity maintained low values in the IC range of 165-373mmol/L, but they started to increase beyond 373mmol/L, and increased by 80% and 23 times, respectively, when the IC reached 618mmol/L...
November 10, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27848987/a-novel-approach-of-utilization-of-the-fungal-conidia-biomass-to-remove-heavy-metals-from-the-aqueous-solution-through-immobilization
#9
Chun-Xiang Cai, Jian Xu, Nian-Fang Deng, Xue-Wei Dong, Hao Tang, Yu Liang, Xian-Wei Fan, You-Zhi Li
The biomass of filamentous fungi is an important cost-effective biomass for heavy metal biosorption. However, use of free fungal cells can cause difficulties in the separation of biomass from the effluent. In this study, we immobilized the living conidia of the heavy metal-resistant Penicillium janthinillum strain GXCR by polyvinyl alcohol (PVA)-sodium alginate (SA) beads to remove heavy metals from an aqueous solution containing a low concentration (70 mg/L) of Cu, Pb, and Cd. The PVA-SA-conidia beads showed perfect characters of appropriate mechanical strength suitable for metal removal from the dynamic wastewater environment, an ideal settleability, easy separation from the solution, and a high metal biosorption and removal rate even after four cycles of successive sorption-desorption of the beads, overcoming disadvantages when fungal biomasses alone are used for heavy metal removal from wastewater...
November 16, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27830482/changing-the-engineering-student-culture-with-respect-to-academic-integrity-and-ethics
#10
Tammy VanDeGrift, Heather Dillon, Loreal Camp
Engineers create airplanes, buildings, medical devices, and software, amongst many other things. Engineers abide by a professional code of ethics to uphold people's safety and the reputation of the profession. Likewise, students abide by a code of academic integrity while learning the knowledge and necessary skills to prepare them for the engineering and computing professions. This paper reports on studies designed to improve the engineering student culture with respect to academic integrity and ethics. To understand the existing culture at a university in the USA, a survey based on a national survey about cheating was administered to students...
November 9, 2016: Science and Engineering Ethics
https://www.readbyqxmd.com/read/27826226/analog-memristive-synapse-in-spiking-networks-implementing-unsupervised-learning
#11
Erika Covi, Stefano Brivio, Alexander Serb, Themis Prodromakis, Marco Fanciulli, Sabina Spiga
Emerging brain-inspired architectures call for devices that can emulate the functionality of biological synapses in order to implement new efficient computational schemes able to solve ill-posed problems. Various devices and solutions are still under investigation and, in this respect, a challenge is opened to the researchers in the field. Indeed, the optimal candidate is a device able to reproduce the complete functionality of a synapse, i.e., the typical synaptic process underlying learning in biological systems (activity-dependent synaptic plasticity)...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27824478/critical-drying-of-liquids
#12
Robert Evans, Maria C Stewart, Nigel B Wilding
We report a detailed simulation and classical density functional theory study of the drying transition in a realistic model fluid at a smooth substrate. This transition (in which the contact angle θ→180°) is shown to be critical for both short-ranged and long-ranged substrate-fluid interaction potentials. In the latter case critical drying occurs at exactly zero attractive substrate strength. This observation permits the accurate elucidation of the character of the transition via a finite-size scaling analysis of the density probability function...
October 21, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27808360/genetic-analysis-of-drought-tolerance-with-respect-to-fiber-traits-in-upland-cotton
#13
R A Nasimi, I A Khan, M A Iqbal, A A Khan
Cotton germplasm was analyzed to investigate its potential for developing water stress tolerance in varieties in the future. Four tolerant (NIAB-78, CIM-482, BH-121, and VH-142) and four susceptible (CIM-446, FH-1000, FH-900, and FH-901) lines were identified of 50 accessions based on their seedling root length. A complete set of diallel crosses among eight selected genotypes was subjected to genetic analysis for fiber property traits. Additive and non-additive genetic variance was involved in the inheritance of fiber strength, fineness, and length under normal and drought conditions...
October 5, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27806757/-a-preliminary-study-on-the-mechanical-characteristics-of-the-titanium-scaffolds-with-three-dimensional-mesh-structure-fabricated-by-electron-beam-melting
#14
R Z Yan, Y F Li, C Wang, R X Li, Z W Liu, M Hu
Objective: To examine the biomechanical properties of three-dimensional(3D) printed electron beam melting(EBM) Ti-6Al-4V mesh as scaffold for mandibular repairment. Methods: We fabricated Ti-6Al-4V samples of different structures with strut, sheet and 3D mesh scaffolds(a controllable diameter 0.35, 0.50, 0.70 mm, distribution density: intensive sparse) by EBM process. The mechanical properties of these structures were examined by X-ray energy dispersive spectrum(EDS), uniaxial tensile test, three-point bending test, under compression load and compared with their different microstructure and mechanical properties...
November 9, 2016: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/27789793/effect-of-the-incorporation-of-chitosan-on-the-physico-chemical-mechanical-properties-and-biological-activity-on-a-mixture-of-polycaprolactone-and-polyurethanes-obtained-from-castor-oil
#15
Fabian Arévalo, Yomaira L Uscategui, Luis Diaz, Martha Cobo, Manuel F Valero
In the present study, polyurethane materials were obtained from castor oil, polycaprolactone and isophorone diisocyanate by incorporating different concentrations of chitosan (0.5, 1.0 and 2.0% w/w) as an additive to improve the mechanical properties and the biological activity of polyurethanes. The polyurethanes were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, stress/strain fracture tests and swelling analysis, and the hydrophilic character of the surface was determined by contact angle trials...
November 2016: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/27782454/thermodynamic-balance-of-perylene-self-assembly-on-ag-110
#16
Kirill Bobrov, Nataliya Kalashnyk, Laurent Guillemot
We present a room temperature STM study of perylene adsorption on Ag(110) at the monolayer coverage regime. We found that structure and symmetry of the perylene monolayer are settled by thermodynamic balance of the three factors: (i) the ability of perylene molecules to recognize specific adsorption sites on the (110) lattice, (ii) the intermolecular interaction, and (iii) the accommodation of thermal motion of the molecules. The moderate strength of the site recognition and the intermolecular interaction, of the same order of magnitude as kT ∼ 25 meV, represents a key feature of the thermodynamic balance...
October 21, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27777564/contextual-positive-psychology-policy-recommendations-for-implementing-positive-psychology-into-schools
#17
Joseph Ciarrochi, Paul W B Atkins, Louise L Hayes, Baljinder K Sahdra, Philip Parker
There has been a rapid growth in positive psychology, a research and intervention approach that focuses on promoting optimal functioning and well-being. Positive psychology interventions are now making their way into classrooms all over the world. However, positive psychology has been criticized for being decontextualized and coercive, and for putting an excessive emphasis on positive states, whilst failing to adequately consider negative experiences. Given this, how should policy be used to regulate and evaluate these interventions? We review evidence that suggests these criticisms may be valid, but only for those interventions that focus almost exclusively on changing the content of people's inner experience (e...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27752659/phase-transitions-and-chromium-iii-luminescence-in-perovskite-type-c2h5nh3-na0-5crxal0-5-x-hcoo-3-x-0-0-025-0-5-correlated-with-structural-dielectric-and-phonon-properties
#18
Maciej Ptak, Mirosław Mączka, Anna Gągor, Adam Sieradzki, Bartosz Bondzior, Przemysław Dereń, S Pawlus
We report the synthesis, crystal structure, dielectric, vibrational and emission spectra of heterometallic MOFs, [C2H5NH3][Na0.5Cr0.5(HCOO)3] (EtANaCr), [C2H5NH3][Na0.5Al0.5(HCOO)3] (EtANaAl) and [C2H5NH3][Na0.5Al0.475Cr0.025(HCOO)3] (EtANaAlCr). These compounds crystallize in non-centrosymmetric monoclinic polar structures (space group Pn) and undergo order-disorder phase transitions upon heating to the monoclinic centrosymmetric structure (space group P21/n) at 369 (EtANaAl) and 373 K (EtANaCr). In principle, they are ferroelectric below these temperatures...
October 18, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27750402/processing-and-strengthening-of-58s-bioactive-glass-infiltrated-titania-scaffolds
#19
J Mesquita-Guimarães, M A Leite, J C M Souza, B Henriques, F S Silva, D Hotza, A R Boccaccini, M C Fredel
In this work, TiO2 ceramic scaffolds were fabricated by the replica method using polyurethane (PU) sponges. Suspensions with high solid content were used to achieve scaffolds with improved mechanical behavior. TiO2 ceramic suspensions were optimized by rheological studies using different additives. It was found that the composition with 0.5 wt% Darvan enhanced the covering of the sponge struts. PU sponges of 45 to 80 ppi (pore per inch) were well coated without clogging pores. A thermal treatment with varying holding times, temperatures and heating rates was adjusted...
October 17, 2016: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/27739697/waves-in-a-quasi-two-dimensional-superparamagnetic-dusty-plasma-liquid-in-a-trap
#20
M Rosenberg, Gabor J Kalman, P Hartmann, Z Donkó
In a two-dimensional (2D) dusty plasma composed of superparamagnetic, charged dust grains and immersed in an external magnetic field B, the grains interact via both Yukawa and magnetic dipole-dipole potentials. Because the grains' magnetic dipole moments are induced by B, the dipole moments all lie along B. When B is tilted with respect to the normal to the dust layer, the interaction between the grains becomes anisotropic. In our previous paper [Hartmann et al., Phys. Rev. E 89, 043102 (2014)PLEEE81539-375510...
September 2016: Physical Review. E
keyword
keyword
74637
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"