A simple and efficient protocol was developed for the syntheses of oridonin analogues, 6,20-epoxy -kaurane diterpenoid analogues from oridonin diethylaminosulfur trifluoride (DAST) promoted rearrangement, most of which exhibited superior anticancer activities compared with their precursor.
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http://dx.doi.org/10.1039/c8ra05728a | DOI Listing |
Chemphyschem
January 2025
University of Leeds, School of Chemistry, Woodhouse Lane, LS2 9JT, Leeds, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND.
The orthorhombic structure of FeNbO4, where the Fe and Nb cations are distributed randomly over the octahedral 4c sites, has shown excellent promise as an anode material in solid oxide fuel cells. We have used DFT+U-D2 calculations to explore the adsorption and dissociation of H2 molecules and the formation reaction of water at the (010) and (111) surfaces. Simulations of the surface properties confirmed that the bandgaps are significantly reduced compared to the bulk material.
View Article and Find Full Text PDFCardiovasc Drugs Ther
January 2025
Department of Cardiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, 16766 Jingshi Road, Jinan City, 250014, China.
Background: Glucagon-like peptide-1 (GLP-1) is a crucial incretin hormone secreted by intestinal endocrine L cells. Given its pivotal physiological role, researchers have developed GLP-1 receptor agonists (GLP-1 RAs) through structural modifications. These analogues display pharmacological effects similar to those of GLP-1 but with augmented stability and are regarded as an effective means of regulating blood glucose levels in clinical practice.
View Article and Find Full Text PDFPhotosynth Res
January 2025
Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia.
The Orange Carotenoid Protein (OCP) is a unique water-soluble photoactive protein that plays a critical role in regulating the balance between light harvesting and photoprotective responses in cyanobacteria. The challenge in understanding OCP´s photoactivation mechanism stems from the heterogeneity of the initial configurations of its embedded ketocarotenoid, which in the dark-adapted state can form up to two hydrogen bonds to critical amino acids in the protein's C-terminal domain, and the extremely low quantum yield of primary photoproduct formation. While a series of experiments involving point mutations within these contacts helped us to identify these challenges, they did not resolve them.
View Article and Find Full Text PDFSmall
January 2025
School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China.
A key issue in photoelectrochemical applications is the modification of the behavior of photogenerated charge barriers. An effective strategy to improve the photoelectrochemical performance of semiconductor materials is to use the facet effect to promote spatial charge separation. In this work, three different morphologies of lead chromate (PbCrO) crystals are prepared by a simple hydrothermal method that used ammonium fluoride as the structure-directing agents.
View Article and Find Full Text PDFChemSusChem
January 2025
Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P.R. China.
Inverted perovskite solar cells (IPSCs) utilizing nickel oxide (NiO) as hole transport material have made great progress, driven by improvements in materials and interface engineering. However, challenges remain due to the low intrinsic conductivity of NiO and inefficient hole transport. In this study, we introduced MoS nanoparticles at the indium tin oxide (ITO) /NiO interface to enhance the ITO surface and optimize the deposition of NiO, resulting in increased conductivity linked to a ratio of Ni:Ni.
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