Results 131 to 140 of about 33,663 (213)

Synergistic Carbon Support Engineering in Composite Catalyst Layer for High‐Performance PEM Fuel Cells

open access: yesCarbon Energy, EarlyView.
Composite Pt/V + Pt/KB electrodes enhance PEMFC efficiency through synergistic optimization of O₂ diffusion, H⁺ conduction, and catalytic activity. ABSTRACT This study introduces an innovative composite cathode catalyst layer (CCL) design for proton exchange membrane fuel cells (PEMFCs), combining Pt‐supported by Vulcan carbon (Pt/V) and Ketjenblack ...
Siming Li   +10 more
wiley   +1 more source

Binding of Tetrapentylammonium to a c‐MYC G‐quadruplex Depicted through NMR and Volumetric Assessment

open access: yesChemistry – A European Journal, EarlyView.
Tetrapentylammonium forms a stable complex with c‐MYC G‐quadruplex, in which the ligand is positioned above the terminal G9‐G13‐G18‐G22 quartet of the host structure and is surrounded by the 3'‐(T23‐A24‐A25) flanking region. The binding proceeds with the release of waters of hydration and a slight decrease in the dynamics of the G‐quadruplex.
Xuan Li   +4 more
wiley   +1 more source

London Dispersion versus Intramolecular Hydrogen Bond in Bis‐Pyridines: How Accurate Is DFT for Competing Noncovalent Interactions in the Condensed Phase?

open access: yesChemistry – A European Journal, EarlyView.
A test system of 14 singly protonated bis‑pyridine salts, with varying H‑bonded and London dispersion interactions, was designed to systematically study non‑covalent interactions across the gas, solution, and solid phases. A good correlation between the 1H chemical shift and the N‐H–N angle from the crystal structures was established.
Adélaïde Savoy   +3 more
wiley   +1 more source

Local sensitivity analysis of a supercritical extraction model

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract This study investigates the process of chamomile oil extraction from chamomile flowers. A parameter‐distributed model, consisting of a set of partial differential equations, was used to describe the governing mass transfer phenomena between solid and fluid phases under supercritical conditions using carbon dioxide as the solvent.
Oliwer Sliczniuk, Pekka Oinas
wiley   +1 more source

Functional regression with intensively measured longitudinal outcomes: a new lens through data partitioning

open access: yesCanadian Journal of Statistics, EarlyView.
Abstract Modern longitudinal data from wearable devices consist of biological signals at high‐frequency time points. Distributed statistical methods have emerged as a powerful tool to overcome the computational burden of estimation and inference with large data, but methodology for distributed functional regression remains limited.
Cole Manschot, Emily C. Hector
wiley   +1 more source

Restricted Tweedie stochastic block models

open access: yesCanadian Journal of Statistics, EarlyView.
Abstract The stochastic block model (SBM) is a widely used framework for community detection in networks, where the network structure is typically represented by an adjacency matrix. However, conventional SBMs are not directly applicable to an adjacency matrix that consists of nonnegative zero‐inflated continuous edge weights.
Jie Jian, Mu Zhu, Peijun Sang
wiley   +1 more source

Rank‐based estimation of propensity score weights via subclassification

open access: yesCanadian Journal of Statistics, EarlyView.
Abstract Propensity score (PS) weighting estimators are widely used for causal effect estimation and enjoy desirable theoretical properties, such as consistency and potential efficiency under correct model specification. However, their performance can degrade in practice due to sensitivity to PS model misspecification.
Linbo Wang   +3 more
wiley   +1 more source

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