Results 121 to 130 of about 585,207 (352)

Scalable Hyperpolarized MRI Enabled by Ace‐SABRE of [1‐13C]Pyruvate

open access: yesAngewandte Chemie, EarlyView.
Ace‐SABRE overcomes previous biocompatibility challenges associated with the Signal Amplification By Reversible Exchange (SABRE) hyperpolarization technique. The employed acetone–water mixtures greatly simplify separation of the hyperpolarized compound (e.g., pyruvate) from solvents and catalysts delivering a biocompatible injectable. Ace‐SABRE retains
Stephen J. McBride   +21 more
wiley   +2 more sources

Minimum reflux calculation for multicomponent distillation in multi‐feed, multi‐product columns: Algorithms and examples

open access: yesAIChE Journal, EarlyView.
Abstract In this work, we present the first algorithm for identifying the minimum reboiler vapor duty requirement for a general multi‐feed, multi‐product (MFMP) distillation column separating ideal multicomponent mixtures. This algorithm incorporates our recently developed shortcut model for MFMP columns.
Zheyu Jiang   +2 more
wiley   +1 more source

A proof of Perko's conjectures for the Bogdanov-Takens system

open access: yes, 2013
The Bogdanov-Takens system has at most one limit cycle and, in the parameter space, it exists between a Hopf and a saddle-loop bifurcation curves. The aim of this paper is to prove the Perko's conjectures about some analytic properties of the saddle-loop
Gasull, Armengol   +3 more
core   +3 more sources

Linking Metallacycle Transfer with Ring‐Opening Metathesis to Generate Polyacetylenes of Unprecedented Structure

open access: yesAngewandte Chemie, EarlyView.
A series of unusual low HOMO‐LUMO gap polyacetylenes bearing ring‐fused tellurophene and vinyl side chains were prepared by combining metallacycle transfer (Hf/p‐block element exchange) with ring‐opening metathesis polymerization (ROMP) into a single modular and efficient protocol.
Abhishek V. Muralidharan   +2 more
wiley   +2 more sources

Alternative Reconstruction of a First Century AD Roman Cavalry Saddle

open access: yesEXARC Journal, 2021
The reconstruction of a First Century AD Roman cavalry saddle has not been investigated since Peter Connolly introduced his ideas of a wooden tree saddle in 1984, based on the evidence and dimensions provided by archaeological finds of leather saddle ...
Moira Watson
doaj  

Design, Control, and Clinical Applications of Magnetic Actuation Systems: Challenges and Opportunities

open access: yesAdvanced Intelligent Systems, Volume 7, Issue 3, March 2025.
This review aims to provide a broad understanding for interdisciplinary researchers in engineering and clinical applications. It addresses the development and control of magnetic actuation systems (MASs) in clinical surgeries and their revolutionary effects in multiple clinical applications.
Yingxin Huo   +3 more
wiley   +1 more source

A numerical method for oscillatory integrals with coalescing saddle points

open access: yes, 2019
The value of a highly oscillatory integral is typically determined asymptotically by the behaviour of the integrand near a small number of critical points.
Huybrechs, Daan   +2 more
core  

Multipoint Coordinative Capture of Olefinic Substrates Utilizing Metal‐Carbon Bonds by Macrocyclic Complex

open access: yesAngewandte Chemie, EarlyView.
We have developed a macrocyclic tetranuclear palladium complex, which has four coordination sites within its inner cavity as a host molecule. The complex captured squalene (C30H50), a linear triterpene with six C═C double bonds, through multipoint palladium‐carbon bonds, and formed a unique host‐guest complex with a folded‐squalene structure.
Kohtaro Sugawara   +2 more
wiley   +2 more sources

Magnetic Field Control Using an Electromagnetic Actuation System with Combined Air‐Core and Metal‐Core Coils

open access: yesAdvanced Intelligent Systems, Volume 7, Issue 3, March 2025.
An electromagnetic manipulation system enhances magnetic field strength in the Z‐direction for 3D control of microrobots and nanoparticles. Featuring eight metal‐core coils and two air‐core coils arranged hemispherically, it ensures unimpeded workspace access and integrates imaging tools.
Nader Latifi Gharamaleki   +4 more
wiley   +1 more source

Highly Crystalline and Oriented Thin Films of Fully Conjugated 3D‐Covalent Organic Frameworks

open access: yesAngewandte Chemie, EarlyView.
This work introduces a fully conjugated, 3D covalent organic framework (COF) based on cyclooctatetrathiophene (COTh); the synthesis employs modulated conditions to achieve thin films with high crystallinity. The COTh‐1P COF shows potential for optoelectronic applications, thanks to its π‐conjugated structure, the preferential film orientation, and ...
Ignacio Munoz‐Alonso   +9 more
wiley   +2 more sources

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