Results 101 to 110 of about 53,027 (281)

Grain mantles: The impact on grain evolution and selective extinction

, 1989
Depletion studies are used to infer the presence of mantles and to constrain grain evolutionary models in the diffuse interstellar medium. The presence of these mantles appears to be important in the evolution of the grains inside diffuse as well as ...
Joseph, Charles L.
core  

Extinguishing cue-controlled reward choice: Effects of Pavlovian extinction on outcome-selective Pavlovian-instrumental transfer

, 2018
Outcome-selective Pavlovian-instrumental transfer (PIT) refers to the finding that presenting Pavlovian predictors of outcomes can enhance the vigor of instrumental responding for those same outcomes. Three experiments examined the sensitivity of outcome-
Le, Pelley ME, Mitchell, Chris J., Seabrooke, Tina, Porter, Alexis, Le Pelley, Mike E.   +4 more
core   +1 more source

Developing a Functional Polyelectrolyte Hybrid Layer Scaffold Coating and Evaluation of Its Performance for Interaction With Neural Cells

Advanced Materials Interfaces, EarlyView.
Polyelectrolyte scaffold coatings modified with Cu and Fe3O4 nanoparticles regulate neural stem cell behavior in vitro. Increased Fe3O4 content enhances mitochondrial activity and neuronal differentiation, whereas higher Cu levels reduce cell viability.
Anna Grzeczkowicz, Agata Lipko, Angelika Kwiatkowska, Marcin Strawski, Monika Drabik, Ludomira H. Granicka   +5 more
wiley   +1 more source

Extinction of Taurus, Orion, Perseus and California Molecular Clouds Based on the LAMOST, 2MASS, and Gaia Surveys. II. The Extinction Law

The Astronomical Journal
The extinction law from ultraviolet (UV) to infrared (IR; 0.2–24 μ m) is determined by relying on the blue-edge method and color-excess ratios for some nearby molecular clouds, from the low-mass star-forming region to the massive star-forming region. The
ZheTai Cao, Biwei Jiang, Shu Wang, Jun Li   +3 more
doaj   +1 more source

Ultra-Small and Fabrication-Tolerant Silicon Polarization Beam Splitter Using Sharp Bent Directional Coupler

IEEE Photonics Journal, 2018
An ultra-small polarization beam splitter on silicon-on-insulator platform is proposed and demonstrated experimentally employing a sharp bent directional coupler. The coupling length of our device is only 0.764 μm.
Xiaodong Wang, Xueling Quan, Wei Zhang, Jie Hu, Chong Shen, Xiulan Cheng   +5 more
doaj   +1 more source

Total to Selective Extinction in the Dark Globule CB 107

The Astrophysical Journal, 2007
We discuss optical (B, V, and I) and near-infrared (J, H, and Ks) imaging observations of the small dark cloud CB 107. The cloud is projected against a rich stellar background, making it possible to detect ~3900 stars in all six photometric bands. After an accurate choice of a reference region, we obtained the color excess Eλ-V maps and derived the ...
CAMPEGGIO, Loretta, STRAFELLA, Francesco, MAIOLO, BERLINDA MARIA TERESA, ELIA, Davide Quintino, AIELLO S.   +4 more
openaire   +2 more sources

Biogeographic and bathymetric determinants of brachiopod extinction and survival during the late ordovician mass extinction [PDF]

, 2016
The Late Ordovician mass extinction (LOME) coincided with dramatic climate changes, but there are numerous ways in which these changes could have driven marine extinctions.
Finnegan, Seth, Mac Ørum Rasmussen, Christian, Rasmussen, Christian, Rasmussen, C.M.Ø, Harper, D.A.T., Finnegan, S., Rasmussen, Christian M Ø, Harper, David, Harper, David A. T., Harper, David A T, Harper, David AT, Rasmussen, Christian MØ   +11 more
core   +1 more source

Minimally Invasive Delivery of Optical Nanosensors Using Injectable Hydrogels

Advanced Materials Interfaces, EarlyView.
Injectable peptide hydrogels offer a minimally invasive delivery platform for single‐walled carbon nanotube (SWCNT)‐based near‐infrared fluorescent sensors, enabling real‐time measurement of drug concentrations. Encapsulated SWCNTs show a dose‐dependent fluorescence response across physiologically relevant concentrations and retain their fluorescence ...
Shirel Kleiner, Gili Bisker
wiley   +1 more source

Extinctions in marine plankton preceded by stabilizing selection

, 2019
Abstract Unless they adapt, populations facing persistent stress are threatened by extinction. Theoretically, populations facing stress can react by either disruption, increasing trait variation, or stabilisation, decreasing trait variation. In the short term, the more economical response is stabilisation, because it quickly transfers a
Weinkauf, Manuel F. G., Bonitz, Fabian G. W., Martini, Rossana, Kučera, Michal   +3 more
openaire   +4 more sources

On the Friction and Wear Mechanisms of Electrified Steel Contacts in CO2: Unveiling the Role of Carbon‐Rich Tribofilms Under Dry Sliding Conditions

Advanced Materials Interfaces, EarlyView.
This study investigates friction and wear of AISI 52100 steel under dry sliding in CO2, air, and N2 atmospheres, with and without contact electrification. CO2 forms a stable carbon‐rich tribofilm that reduces friction by ∼30% and wear by ∼85%. High‐resolution TEM, EELS, and molecular dynamics reveal pressure‐dependent lubrication mechanisms, showing ...
Julio A. Cao‐Romero‐Gallegos, Seungjoo Lee, Cagatay Yelkarasi, Leonardo I. Farfan‐Cabrera, Ryuichi Okamoto, Hitoshi Washizu, Ali Erdemir   +6 more
wiley   +1 more source