Search results for "MOBILITY"

Naphthalenediimide Polymers with Finely Tuned In-Chain π-Conjugation: Electronic Structure, Film Microstructure, and Charge Transport Properties

2016

Naphthalenediimide-based random copolymers (PNDI-TVTx) with different π-conjugated dithienylvinylene (TVT) versus π-nonconjugated dithienylethane (TET) unit ratios (x = 100→0%) are investigated. The PNDI-TVTx-transistor electron/hole mobilities are affected differently, a result rationalized by molecular orbital topologies and energies, with hole mobility vanishing but electron mobility decreasing only by ≈2.5 times when going from x = 100% to 40%.

Growth and characterization of GdxHg1−xSe crystals

2008

Abstract The growth of GdxHg1−xSe crystals by the vertical Bridgman method was studied in the composition range 0⩽x⩽0.1. The structural and electronic properties of GdxHg1−xSe crystals were investigated as a function of composition. It was found that an increase in gadolinium content up to x=0.01 results in a decrease of structural defects and an increase in electron mobility up to the maximum value of μ77≈2.8×105 cm2/V s. Structural defects start to increase at x>0.01, and the formation of Gd2Se3 amorphous phase takes place at x>0.03. On the base of the electron-spin resonance investigation, it was shown that the Gd incorporates into the HgSe host in Gd3+ charge state at the concentration …

Electrospray ion mobility mass spectrometry of positively charged sodium bis[2-ethythexyl)sulfosuccinate aggregates.

2014

Collision cross-sections (CCS) of positively singly and multiply charged aggregates of the surfactant sodium bis(2-ethylhexyl)sulfosuccinate (AOTNa) in the gas phase have been measured by quadrupole ion mobility time-of-flight mass spectrometry. Calibration of the observed drift times to the CCS of the AOTNa non-covalent aggregates was achieved by collecting, under the same experimental conditions, the drift times of a range of singly and multiply charged polyalanine peptides whose CCS had been obtained by conventional ion mobility spectrometry. Together with an obvious increase of the aggregate cross-section with the aggregation number, it was found that the aggregate cross-section increa…

New conducting radical salts based upon Keggin-type polyoxometalates and perylene

2004

Three new radical salts, Per6[PMo12O40]·CH2Cl2 (1), Per6[PMo12O40]·CH3CN (2), and Per9(NBu4)4[SiW12O40]2 (3) (Per = perylene), have been synthesised and their electrical and magnetic properties characterised. These three salts are diamagnetic and they behave as semiconductors with room temperature conductivities of 69, 3.6 and 0.85 S cm−1. While salt 2 presents hole-type conduction and 3 exhibits electron-dominated electrical transport properties, salt 1 shows at 150 K an abrupt change in the thermal dependence of the electrical conductivity and the Seebeck coefficient suggesting a phase transition.

2004

β-oxidation of long and very long chain fatty acyl-CoA derivatives occurs in peroxisomes, which are ubiquitous subcellular organelles of eukaryotic cells. This pathway releases acetyl-CoA as precursor for several key molecules such as cholesterol. Numerous enzymes participating to cholesterol and fatty acids biosynthesis pathways are co-localized in peroxisomes and some of their encoding genes are known as targets of the NFY transcriptional regulator. However, until now no interaction between NFY transcription factor and genes encoding peroxisomal β-oxidation has been reported. This work studied the interactions between NFY factor with the rat gene promoters of two enzymes of the fatty acid…

Inteligentna (smart) logistyka miejska

2016

The concepts of city logistics its not new, they are implemented since the 80's of the XX century, but to this time they didn't bring any effect. The communications problem in the agglomerations are bigger and bigger. It makes that searching a new Solutions (e.g. intelligent information and communication system) is necessary. The use of this Systems makes that city and logistic are becoming smart. The aim of this article is to present intelligent solutions, which can be implemented to city logistics. Additionaly the author shows that the mobility concept may help to improve the quality of life.

Antiochia di Siria di fronte al problema dell’immigrazione. (Lib., Or. 56, 22-23)

2018

In the paragraphs 22-23 of the speech 56, Libanius proposes the expulsion of foreigners from the city of Antioch. The measure, in fact, is not so peremptory, as it contains rather the criterion whereby to separate the good or moderate from the bad or intemperate: having home, wife, children and work is the condition for making a good citizen. Thus emerges a subtle discrimen among the foreigners who constituted the claque, disease of the city, and which therefore deserved to be eradicated away, and the other xenoi fully incorporated into the social and citizen context within which they could safely remain.

SART and Individual Trial Mistake Thresholds: Predictive Model for Mobility Decline

2021

The Sustained Attention to Response Task (SART) has been used to measure neurocognitive functions in older adults. However, simplified average features of this complex dataset may result in loss of primary information and fail to express associations between test performance and clinically meaningful outcomes. Here, we describe a new method to visualise individual trial (raw) information obtained from the SART test, vis-à-vis age, and groups based on mobility status in a large population-based study of ageing in Ireland. A thresholding method, based on the individual trial number of mistakes, was employed to better visualise poorer SART performances, and was statistically validated with bin…

Logistyka miasta jako podstawa kształtowania zachowań komunikacyjnych

2013

Stały wzrost wykorzystania indywidualnych środków komunikacji miejskiej potęguje zjawisko kongestii i obniżenie jakości życia w mieście. Dążenie do ograniczenia negatywnych skutków podróży indywidualnych wymaga nie tylko zastosowania zmian organizacyjno-prawnych, ale przede wszystkim zachowań komunikacyjnych mieszkańców. W artykule zaprezentowano podstawowe etapy zmian zachowań mobilnościowych oraz instrumenty wspierające te zmiany.

Increased conformational rigidity of humic substances by oxidative biomimetic catalysis

2005

A synthetic water-soluble meso-tetra(2,6-dichloro-3-sulfonatophenyl)porphyrinate of iron(III) chloride, Fe(TDCPPS)Cl, was employed as a biomimetic catalyst in the oxidative coupling of terrestrial humic materials. High-performance size-exclusion chromatography (HPSEC), solid-state nuclear magnetic resonance (CPMAS-(13)C NMR), electron paramagnetic resonance (EPR), and diffuse reflectance infrared spectroscopy (DRIFT) were used to follow conformational and structural changes brought about in different humic materials by the oxidative coupling. Increase in apparent weight-average molecular weight (Mw(a)) occurred invariably for all humic substances with the oxidative polymerization catalyzed …