Now showing items 82-101 of 2142

• #### Are Isoursenol and γ-Amyrin Rare Triterpenes in Nature or Simply Overlooked by Usual Analytical Methods? ﻿

(2015)
Among pentacyclic triterpenes commonly found in plants, γ-amyrin and isoursenol are seldom reported and considered rare in nature. It was hypothesized that these triterpenes are instead routinely overlooked due to inadequate ...

(2014)
• #### Artificial topological models based on a one-dimensional spin-dependent optical lattice ﻿

(2017)
Topological matter is a popular topic in both condensed matter and cold-atom research. In the past decades, a variety of models have been identified with fascinating topological features. Some, but not all, of the models ...
• #### Assembly of a Three-Dimensional Multitype Bronchiole Coculture Model Using Magnetic Levitation ﻿

(2013)
A longstanding goal in biomedical research has been to create organotypic cocultures that faithfully represent native tissue environments. There is presently great interest in representative culture models of the lung, ...
• #### Assessing Inhomogeneity in Sorted Samples of Single-Walled Carbon Nanotubes through Fluorescence and Variance Spectroscopy ﻿

(2017)
Detailed spectroscopic analysis has been used to study the homogeneity of single-walled carbon nanotube fractions carefully prepared by nonlinear density gradient ultracentrifugation sorting. Two distinct colored bands ...
• #### Assessing offsets between the δ13C of sedimentary components and the global exogenic carbon pool across early Paleogene carbon cycle perturbations ﻿

(2012)
[1] Negative stable carbon isotope excursions (CIEs) across the Paleocene–Eocene thermal maximum (PETM; ~56 Ma) range between 2‰ and 7‰, even after discounting sections with truncated records. Individual carbon isotope ...
• #### Assessing the impacts of nonrandom seed dispersal by multiple frugivore partners on plant recruitment ﻿

(2015)
Directed dispersal is defined as enhanced dispersal of seeds into suitable microhabitats, resulting in higher recruitment than if seeds were dispersed randomly. While this constitutes one of the main explanations for the ...
• #### Assessment of the Tao-Mo nonempirical semilocal density functional in applications to solids and surfaces ﻿

(2017)
Recently, Tao and Mo developed a semilocal exchange-correlation density functional. The exchange part of this functional is derived from a density-matrix expansion corrected to reproduce the fourth-order gradient expansion ...
• #### The Atlastin C-terminal Tail is an Amphipathic Helix that Perturbs Bilayer Structure during Endoplasmic Reticulum Homotypic Fusion ﻿

(2015)
Fusion of tubular membranes is required to form three-way junctions found in reticular subdomains of the endoplasmic reticulum (ER). The large GTPase Atlastin has recently been shown to drive ER membrane fusion and three-way ...
• #### Atomic cobalt on nitrogen-doped graphene for hydrogen generation ﻿

(2015)
Reduction of water to hydrogen through electrocatalysis holds great promise for clean energy, but its large-scale application relies on the development of inexpensive and efficient catalysts to replace precious platinum ...
• #### Atomic H-Induced Mo2C Hybrid as an Active and Stable Bifunctional Electrocatalyst ﻿

(2017)
Mo2C nanocrystals (NCs) anchored on vertically aligned graphene nanoribbons (VA-GNR) as hybrid nanoelectrocatalysts (Mo2C–GNR) are synthesized through the direct carbonization of metallic Mo with atomic H treatment. The ...
• #### Au Nanomatryoshkas as Efficient Near-Infrared Photothermal Transducers for Cancer Treatment: Benchmarking against Nanoshells ﻿

(2014)
Au nanoparticles with plasmon resonances in the near-infrared (NIR) region of the spectrum efficiently convert light into heat, a property useful for the photothermal ablation of cancerous tumors subsequent to nanoparticle ...
• #### Autoionization of very-high-n strontium Rydberg atoms ﻿

(2017)
The autoionization of high n, n~280-430, strontium Rydberg states through excitation of the 5s 2S1/2→5p 2P1/2 transition in the core ion is investigated. The autoionization rates decrease rapidly as L is increased paving ...
• #### Autoionization of very-high-n strontium Rydberg states ﻿

(2018)
We study, using a combination of experiment and theory, the excitation and decay of very-high-n(n∼280–430) strontium autoionizing Rydberg states formed by near-resonant driving of the 5s2S1/2→5p2P1/2 core-ion transition. ...
• #### Avoiding unintentional eviction from integral projection models ﻿

(2012-09)
Integral projection models (IPMs) are increasingly being applied to study size-structured populations. Here we call attention to a potential problem in their construction that can have important consequences for model ...
• #### Azimuthal Anisotropy in $\mathrm{U}+\mathrm{U}$ and $\mathrm{Au}+\mathrm{Au}$ Collisions at RHIC ﻿

(2015)
Collisions between prolate uranium nuclei are used to study how particle production and azimuthal anisotropies depend on initial geometry in heavy-ion collisions. We report the two- and four-particle cumulants, v2{2} and ...
• #### Azimuthal anisotropy in Cu+Au collisions at $\sqrt{{s}_{\mathit{NN}}}=200$ GeV ﻿

(2018)
The azimuthal anisotropic flow of identified and unidentified charged particles has been systematically studied in Cu+Au collisions at √sNN=200 GeV for harmonics n=1–4 in the pseudorapidity range |η|<1. The directed flow ...
• #### Azimuthal Anisotropy of Charged Particles at High Transverse Momenta in Pb-Pb Collisions at √sNN=2.76  TeV ﻿

(2012)
The azimuthal anisotropy of charged particles in Pb-Pb collisions at √sNN=2.76  TeV is measured with the CMS detector at the LHC over an extended transverse momentum (pT) range up to approximately 60  GeV/c. The data cover ...
• #### Azimuthal anisotropy of charged particles with transverse momentum up to 100 GeV/c in PbPb collisions at sNN=5.02 TeV ﻿

(2018)
The Fourier coefficients v2 and v3 characterizing the anisotropy of the azimuthal distribution of charged particles produced in PbPb collisions at sNN=5.02 TeV are measured with data collected by the CMS experiment. The ...
• #### Azimuthal transverse single-spin asymmetries of inclusive jets and charged pions within jets from polarized-proton collisions at $\sqrt{s}=500\text{ }\text{ }\mathrm{GeV}$ ﻿

(2018)
We report the first measurements of transverse single-spin asymmetries for inclusive jet and jet+π± production at midrapidity from transversely polarized proton-proton collisions at √s=500 GeV. The data were collected in ...