Results 41 to 50 of about 41,251 (305)

Regioselective Synthesis of 5-Propyl-2-((trityloxy)methyl)thiophene-3-carbaldehyde

Molbank, 2021
5-propyl-2-((trityloxy)methyl)thiophene-3-carbaldehyde was synthesized by using the concept of chemo- and regioselective Br/Li exchange reaction from 3-bromo-5-propyl-2-((trityloxy)methyl)thiophene.
Sukanta Bar
doaj   +1 more source

Bromine-vapor treatment.

, 2020
(A) Schematic showing the treatment process (B) XPS data showing the Pb 4f core peak from the top surface of the brominated crystals. Suppression of the Pb° peaks is found (C) XRD of the various MAPbBr3 crystals showing the (002) scattering peak shift (D)
Ahmed M. El-Zohry (1598215), Omar F. Mohammed (1262202), Ahmad R. Kirmani (1817770), Chen Yang (207381), Ahmed E. Mansour (3722914), Aram Amassian (1476475), Rahim Munir (3270516)   +6 more
core   +1 more source

Sex‐Stratified Association of Regional Dopamine Transporter Binding With Disease Progression in Amyotrophic Lateral Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To clarify the clinical relevance of dopamine transporter single‐photon emission computed tomography (DAT‐SPECT) abnormalities in amyotrophic lateral sclerosis (ALS), with a prespecified focus on sex‐stratified associations with disease progression and short‐term prognosis.
Tomoya Kawazoe, Keizo Sugaya, Kentaro Hayashi, Keiko Hino, Yasuhiro Nakata, Kota Bokuda, Toshio Shimizu, Kazushi Takahashi   +7 more
wiley   +1 more source

Phase-vanishing halolactonization of neat substrates

Beilstein Journal of Organic Chemistry, 2008
Phase-vanishing reactions are triphasic reactions which involve a reagent, a liquid perfluoroalkane as a phase screen and a substrate. The perfluoroalkane does not dissolve any of the reactants and is used to separate them.
Nicole Windmon, Veljko Dragojlovic
doaj   +1 more source

rac-(E,trans)-4-Bromo-10,10-dimethyl-9,11-dioxabicyclo[6.3.0]undec-4-ene

IUCrData, 2020
In the title compound, a cyclooctene ring in a twist-boat conformation and a dioxolane ring with a distorted envelope conformation are annulated in a trans configuration. Alternating strands of single enantiomers build up the crystal. Within the strands,
Dieter Schollmeyer, Maximilian Heidrich, Heiner Detert   +2 more
doaj   +1 more source

Implications of Snowpack Reactive Bromine Production for Arctic Ice Core Bromine Preservation [PDF]

, 2023
Snowpack emissions are recognized as an important source of gas-phase reactive bromine in the Arctic and are necessary to explain ozone depletion events in spring caused by the catalytic destruction of ozone by halogen radicals.
Shuting Zhai, Chellman, Nathan, Fujita, Koji, Sigl, Michael, Lyatt Jaeglé, Zhai, Shuting, McConnell, Joseph R, Swanson, William, Michael Sigl, Alexander, Becky, Nathan Chellman, Jack E. Dibb, Meyer, Hanno, Dibb, Jack E., Joseph R. McConnell, Wang, Xuan, Dibb, Jack E, McConnell, Joseph R., Thomas Opel, Hanno Meyer, William Swanson, Jaeglé, Lyatt, Stutz, Jochen, Jochen Stutz, Xuan Wang, Opel, Thomas, Becky Alexander, Koji Fujita   +27 more
core   +1 more source

Frailty Predicts Incident Osteoporotic Fractures in Veterans with Rheumatoid Arthritis

Arthritis Care &Research, Accepted Article.
Background/Objective Rheumatoid arthritis (RA) is associated with an increased risk of frailty and osteoporosis, but the relationship between frailty and incident osteoporotic fractures in RA is underexplored. Methods Data were from the Veterans Affairs Rheumatoid Arthritis (VARA) Registry.
Katherine D. Wysham, Hannah F. Brubeck, Aaron Baraff, Punyasha Roul, Namrata Singh, James S. Andrews, Grant W. Cannon, Gary A. Kunkel, Ted R. Mikuls, Bryant R. England, Dolores M. Shoback, Patricia P. Katz, Jose M. Garcia, Ariela R. Orkaby, Joshua F. Baker   +14 more
wiley   +1 more source

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source

Asparagopsis taxiformis supplementation to mitigate enteric methane emissions in dairy cows—Effects on performance and metabolism

Journal of Dairy Science
: Methane emissions from ruminant digestion contribute significantly to global anthropogenic greenhouse gas emissions. Members of the phylum Rhodophyta (red algae), particularly Asparagopsis sp., have shown promising results in reducing methane emissions
M. Angellotti, M. Lindberg, M. Ramin, S.J. Krizsan, R. Danielsson   +4 more
doaj   +1 more source

Modelling future changes to the stratospheric source gas injection of biogenic bromocarbons

Geophysical Research Letters, 2012
Simulations with a chemistry‐climate model (CCM) show a future increase in the stratospheric source gas injection (SGI) of biogenic very short‐lived substances (VSLS).
R. Hossaini, M. P. Chipperfield, S. Dhomse, C. Ordóñez, A. Saiz‐Lopez, N. L. Abraham, A. Archibald, P. Braesicke, P. Telford, N. Warwick, X. Yang, J. Pyle   +11 more
doaj   +1 more source