Results 21 to 30 of about 813,980 (316)

Image2SMILES: Transformer-based Molecular Optical Recognition Engine

open access: yes, 2021
The rise of deep learning in various scientific and technology areas promotes the development of AI-based tools for information retrieval. Optical recognition of organic structures is a key part of the automated extraction of chemical information ...
Sergey, Sosnin   +3 more
core   +1 more source

Gold-catalyzed stereoselective cycloisomerization of allenoic acids for two types of common natural γ-butyrolactones

open access: yesNature Communications, 2018
Gamma-butyrolactones are widespread in Nature, however direct catalytic methods to access them are limited. Here, the authors report a gold-catalyzed cycloisomerization of allenoic acids to acces γ-butyrolactones and apply it to the asymmetric synthesis ...
Jing Zhou, Chunling Fu, Shengming Ma
doaj   +1 more source

Microparticles as Viral RNA Carriers from Stool for Stable and Sensitive Surveillance

open access: yesDiagnostics, 2023
Since its discovery, polymerase chain reaction (PCR) has emerged as an important technology for the diagnosis and identification of infectious diseases.
Emmanuel George Kifaro   +8 more
doaj   +1 more source

Bioinspired tetraamino-bisthiourea chiral macrocycles in catalyzing decarboxylative Mannich reactions

open access: yesBeilstein Journal of Organic Chemistry, 2022
A series of tetraamino-bisthiourea chiral macrocycles containing two diarylthiourea and two chiral diamine units were synthesized by a fragment-coupling approach in high yields.
Hao Guo   +3 more
doaj   +1 more source

metalloendopeptidase using molecular docking analysis

open access: yes, 2022
Jatropha mollissima is endemic to Brazil and is used for traditional medicinal purposes, including the treatment of snakebite. In this study, latex obtained from this plant was fractioned using reversed-phase chromatography, and the fractions were then ...
Stephen P. Mackessy   +11 more
core   +1 more source

Photoredox cooperative N-heterocyclic carbene/palladium-catalysed alkylacylation of alkenes

open access: yesNature Communications, 2022
Three-component carboacylation of simple alkenes often requires directing groups and strained substrates. Here, the authors report a photoredox N-heteroyclic carbene/Pd-catalysed alkylacylation of alkenes with aldehydes and unactivated alkyl halides ...
You-Feng Han   +5 more
doaj   +1 more source

Molecular Recognition in a Thermoplastic Elastomer

open access: yesJournal of the American Chemical Society, 2005
Selective incorporation of bisurea guests in thermoplastic elastomers with poly(tetrahydrofuran) soft blocks and bisurea containing hard blocks is observed when the distances between the urea groups of host and guest match. The incorporation leads to significant modulation of mechanical properties.
Koevoets, R.A.   +5 more
openaire   +5 more sources

Developments in Molecular Recognition and Sensing at Interfaces

open access: yes, 2007
In biological systems, molecular recognition events occur mostly withininterfacial environments such as at membrane surfaces, enzyme reaction sites, or at theinterior of the DNA double helix.
Jonathan P. Hill   +2 more
core   +1 more source

Ketones from aldehydes via alkyl C(sp3)−H functionalization under photoredox cooperative NHC/palladium catalysis

open access: yesNature Communications, 2023
Direct synthesis of ketones from aldehydes features high atom- and step-economy. Yet, the coupling of aldehydes with unactivated alkyl C(sp3)-H remains challenging.
Hai-Ying Wang   +4 more
doaj   +1 more source

Molecular Recognition of Arginine by Supramolecular Complexation with Calixarene Crown Ether Based on Surface Plasmon Resonance

open access: yes, 2011
Arginine plays an important role in cell division and the functioning of the immune system. We describe a novel method by which arginine can be identified using an artificial monolayer based on surface plasmon resonance (SPR).
Yongmei Yin   +4 more
core   +1 more source

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