Studies were conducted to examine the effect of treating Zinnia elegans Jacq. with soluble silicon on the performance of the green peach aphid, Myzus persicae (Sulzer). Z. elegans plants were irrigated every 2 d throughout the duration of the experiment with a nutrient solution amended with potassium silicate (K2SiO2), or a nutrient solution without K2SiO2. Length of the prereproductive period ...

This report evaluates the protective effect of caffeoylquinic acid (CA) injury to oligodendrocyte precursor cells (OPCs) by promoting the formation of oligodendrocytes. Neonatal rat brain was used to isolate primary OPCs and non-lethal CoCl2 was used to induce hypoxic stress to inhibit the differentiation of OPCs. Differentiation of OPCs was estimated by survival assay and the expressions of my...

Plant root encounters coarse environs right after emergence from the seed. Little is known about metabolic changes enabling to overcome soil impedance. It also not whether roots respond differently hardness when grown in horizontal and vertical orientation. We grew tomato (Solanum lycopersicum) seedlings vertically or horizontally on agarose with increasing (0.2 % → 1.2 %). examined morphology ...

The present investigation has been carried out to determine the antioxidant activity of the methanolic extracts obtained from four cultivars of cowpea (Vigna unguiculata (L) Walp.) seeds. Phenolic compounds present in the extracts showed the antioxidant and antiradical properties when investigated using a linoleic acid peroxidation model, FRAP, ORAC and TRAP assays, as well as DPPH, hydroxyl, n...

Three new glucosylated caffeoylquinic acid isomers (1-3), along with six known compounds, have been isolated from an aqueous extract of the flower buds of Lonicera japonica. Structures of the new compounds were determined by spectroscopic and chemical methods as (-)-4-O-(4-O-β-d-glucopyranosylcaffeoyl)quinic acid (1), (-)-3-O-(4-O-β-d-glucopyranosylcaffeoyl)quinic acid (2), and (-)-5-O-(4-O-β-d...

Bioactive-directed fractionation of n-butanol extract from fresh fruits of Randia siamensis led to isolate of 4 new pseudoginsenoside compounds: pseudoginsenosides-RT2, -RT3, RT4 and -RT5, together with 7 known compounds: tyramine, pseudoginsenosides-RT1 methyl ester, pseudoginsenosides-RT1, pseudoginsenoside-RP1, kaempferol-3-O-β-D-xylose(1-2)-βgalactose, kaempferol-3-O-β-D-galactose, and 5-O...