Now showing items 2865-2884 of 12439

• #### Direct observation of intermediates in a thermodynamically controlled solid state dynamic covalent reaction ﻿

(American Chemical Society, 2014-10-14)
We present the first polymorph interconversion study that uses solid state dynamic covalent chemistry (DCC). This system exhibits unexpected and rich behavior, including the observation that under appropriate conditions the ...
• #### Direct observation of ion dynamics in supercapacitor electrodes using $\textit{in situ}$ diffusion NMR spectroscopy ﻿

(Nature Publishing Group, 2017-02-06)
Ionic transport inside porous carbon electrodes underpins the storage of energy in supercapacitors and the rate at which they can charge and discharge, yet few studies have elucidated the materials properties that influence ...
• #### Direct observation of molecular arrays in the organized smooth endoplasmic reticulum ﻿

(2009-08-24)
Abstract Background Tubules and sheets of endoplasmic reticulum perform different functions and undergo inter-conversion during different stages of the cell cycle. Tubules are stabilized by curvature inducing resident ...
• #### Direct Optofluidic Measurement of the Lipid Permeability of Fluoroquinolones ﻿

(Nature Publishing Group, 2016-09-08)
Quantifying drug permeability across lipid membranes is crucial for drug development. In addition, reduced membrane permeability is a leading cause of antibiotic resistance in bacteria, and hence there is a need for new ...
• #### Direct photonic coupling of a semiconductor quantum dot and a trapped ion ﻿

(American Physical Society, 2015-03-23)
Coupling individual quantum systems lies at the heart of building scalable quantum networks. Here, we report the first direct photonic coupling between a semiconductor quantum dot and a trapped ion and we demonstrate ...
• #### Direct surface analysis coupled to high-resolution mass spectrometry reveals heterogeneous composition of the cuticle of Hibiscus trionum petals ﻿

(American Chemical Society, 2015-09-03)
Plant cuticle, the outermost layer covering the aerial parts of all plants including petals and leaves, can present a wide range of patterns, which, combined with cell shape, can generate unique physical, mechanical or ...
• #### Direct Surface Analysis of Time-Resolved Aerosol Impactor Samples with Ultrahigh-Resolution Mass Spectrometry ﻿

(American Chemical Society, 2012-10-18)
Aerosol particles in the atmosphere strongly influence the Earth’s climate and human health, but the quantification of their effects is highly uncertain. The complex and variable composition of atmospheric particles is a ...
• #### Directed collective motion of bacteria under channel confinement ﻿

(Institute of Physics, 2016-07-01)
Dense suspensions of swimming bacteria are known to exhibit collective behaviour arising from the interplay of steric and hydrodynamic interactions. Unconfined suspensions exhibit transient, recurring vortices and jets, ...
• #### Directed differentiation of human induced pluripotent stem cells into functional cholangiocyte-like cells ﻿

(Nature Publishing Group, 2017-04-01)
The difficulty in isolating and propagating functional primary cholangiocytes is a major limitation in the study of biliary disorders and the testing of novel therapeutic agents. To overcome this problem, we have developed ...
• #### Directed evolution of anti-HER2 DARPins by SNAP display reveals stability/function trade-offs in the selection process ﻿

(Oxford University Press, 2015-06-30)
In vitro display technologies have proved to be powerful tools for obtaining high-affinity protein binders. We recently described SNAP display, an entirely in vitro DNA display system that uses the SNAP-tag to link protein ...
• #### Directed Phase Transfer of an Fe$^{II}$$_{4}$L$_{4}$ Cage and Encapsulated Cargo ﻿

Supramolecular capsules can now be prepared with a wide range of volumes and geometries. Consequently, many of these capsules encapsulate guests selectively by size and shape, an important design feature for separations. ...
• #### The directional dependence of elastic stiffness and compliance shear coefficients and shear moduli in cubic materials ﻿

(Springer, 2014-12-31)
The mathematics associated with the representation surfaces for elastic stiffness and compliance shear coefficients and shear moduli for planes in the standard 001–011–111 stereographic triangle for cubic materials is ...
• #### Direitos Sociais na Constituição Uma Análise da Constitucionalização dos Direitos Sociais em Portugal, 1975-76 ﻿

(Instituto Português de Relações Internacionais, 2016)
Embora todas as constituições incluam direitos, e muitas delas incluam direitos sociais, a verdade é que algumas são mais generosas do que outras a este respeito. Mas nenhuma se aproxima da Constituição da República ...
• #### Direkte Demokratie als Waffe der Rechtspopulisten? ﻿

(Forum, 2016-04-11)
In den letzten Jahrzehnten verzeichneten rechtspopulistische Parteien in vielen europäischen Ländern einen Aufwärtstrend. Bei genauerer Betrachtung fallen jedoch einige nationale Unterschiede auf. In der Schweiz sind ...
• #### The DIS(chi) Scheme for Heavy Quark Production at Small x. ﻿

(High Energy Physics, Cavendish Laboratory, University of Cambridge, 2006-05)
In order to successfully describe DIS data, one must take heavy quark mass effects into account. This is often achieved using so called variable flavour number schemes, in which a parton distribution for the heavy quark ...
• #### Disability Insurance and the Dynamics of the Incentive-Insurance Tradeoff ﻿

(American Economic Association, 2015)
We provide a lifecycle framework for comparing the insurance value and the incentive cost of disability benefits. We estimate the risks that individuals face and the parameters governing the disability insurance program ...
• #### Disappointment and regret enhance corrugator reactivity in a gambling task ﻿

(Wiley, 2014)
This study investigated how the corrugator and zygomaticus respond to decision outcomes, i.e. gains and losses. We used a gambling task in which participants were presented with obtained followed by non-obtained outcomes. ...
• #### Disaster Management in Pakistan ﻿

(2015-07-30)
Pakistan’s largest metropolis and economic hub, Karachi, surrounded by numerous tectonically active faults, is ill-equipped to cope with seismic hazards. The city is vulnerable mainly due to inadequate construction techniques, ...
• #### Disc reflection and a possible disc wind during a soft X-ray state in the neutron star low-mass X-ray binary 1RXS J180408.9-342058 ﻿

(Oxford University Press, 2016-10-01)
1RXS J180408.9–342058 is a transient neutron star low-mass X-ray binary that exhibited a bright accretion outburst in 2015. We present $\textit{NuSTAR}$, $\textit{Swift}$, and $\textit{Chandra}$ observations obtained around ...
• #### Disclosure of donor conception in the era of non-anonymity: safeguarding and promoting the interests of donor-conceived individuals? ﻿

(Oxford University Press, 2016-10-03)
This article responds to a debate article published in $\textit{Human Reproduction}$ earlier this year. In that article, the authors suggested that parents should be encouraged to disclose the use of donor gametes to their ...