A new flavonol glycoside from the flowers of <i>Hosta plantaginea</i> with cyclooxygenases-1/2 inhibitory and antioxidant activities

<p><i>Hosta plantaginea</i> was a traditional Chinese medicinal plants used to treat inflammatory and painful diseases with partial scientific validation. Solvent extractions followed by repeated chromatographic purification of the <i>H. plantaginea</i> flowers led to the isolation of one new flavonoid glycoside, hostaflavone A (<b>1</b>), together with one related known compound, kaempferol-3-<i>O</i>-sophoroside-7-<i>O</i>-glucoside (<b>2</b>), and their structures were elucidated on the basis of chemical and spectral evidence, as well as by comparison with literature data. Compounds <b>1</b> and <b>2</b> were evaluated for the anti-inflammatory activites against cyclooxygenases (COX-1 and COX-2) and DPPH free radical-scavenging activities <i>in vitro</i>. The results revealed that <b>1</b> and <b>2</b> exhibited significant COX-1 inhibition and moderate COX-2 inhibition compared to the reference celecoxib. Additionally, <b>1</b> and <b>2</b> displayed insignificant antioxidant activities compared to the positive control L-ascorbic acid.</p

Additional file 1: Table S1. of Characterization and annotation of Babesia orientalis apicoplast genome

PCR primers used in sequencing the Babesia orientalis apicoplast genome. (DOC 67 kb

Electrochemical Behavior of the Biomass Hard Carbon Derived from Waste Corncob as a Sodium-Ion Battery Anode

Biomass-derived hard carbon exhibits remarkable potential as an anode material for sodium-ion batteries (SIBs) owing to its inexpensive cost, availability of resources, and excellent electrochemical performance. However, the relatively low initial Coulombic efficiency (ICE) significantly confines the realistic application of hard carbon anode materials in SIBs. In this work, corncob-derived hard carbon (CDHC) materials were synthesized from biomass waste corncob. It has been found that the interlayer spacing of the synthesized hard carbon material is greater than 0.37 nm, which clearly surpasses the layer spacing of graphite. This larger layer spacing is favorable for the intercalation and deintercalation ability of sodium ions during the charging and discharging processes. When CDHC is applied by the anode of sodium-ion batteries, it shows excellent sodium storage performance, with a maximum reversible capacity of approximately 311 mAh g–1 and the first Coulombic efficiency close to 80%