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Polypyrrole/SiO2nanocomposite doped with 3‐nitrosalicylic acid was synthesized in three concentrations of 3‐nitrosalicylic acid: 0.01 m, 0.005 m, and 0.0025 m. FTIR spectroscopy, thermogravimetric analysis (TGA), Raman scattering spectroscopy, and FESEM imaging further assisted in determining the shape and structure of the polypyrrole/nanocomposite product. The aluminum protection arrangement of the paint film comprising polypyrrole/SiO2nanocomposite doped with 3‐nitrosalicylic acid was proven by electrochemical methods. The salt spray test results also demonstrated the protective efficacy of the paint film comprising polypyrrole/SiO2nanocomposite doped with 3‐nitrosalicylic acid to suppress corrosion. The best corrosion prevention results were obtained with a polypyrrole/SiO2nanocomposite dispersion paint film doped with 0.01 m3‐nitrosalicylic acid at a concentration of 2%. Open circuit potential curves of aluminum coated with original paint film (Mo), paint film containing SiO2(T1), and paint film containing Ppy/SiO2(T2, T3, T4, and T5) according to immersing time in 3% NaCl solution.

A phytochemical survey aiming to acquire pharmacologically active substances has resulted in the isolation of five dolabrane‐ (1–5), and ent‐pimarane‐type diterpenoids (6) were isolated from the methanol extract of C. decandra(Griff.) W. Theob. stem barks, via various chromatographic separations. Their structures were elucidated to be ent‐5α,3,15‐dioxodolabr‐1,4(18)‐diene‐2,16‐diol (1), tagalene I (2), ent‐5α,2,15‐dioxodolabr‐3‐ene‐3,16‐diol (3), tagalsin S (4), notolutesin H (5), and ent‐8,15R‐epoxypimaran‐16‐ol (6) by comprehensive analysis of spectroscopic data (1D, 2D NMR, and ESI‐MS data) as well as comparison with the previous literature. All of the isolates were evaluated for their cytotoxicity against human lung cancer (SK‐LU‐1), human hepatocellular carcinoma (HepG2), and human breast cancer (MCF‐7) cell lines. Compounds 2and 6exerted inhibitions toward three tumor cell lines (SK‐LU‐1, HepG2, and MCF‐7) with IC50values between 5.63 and 11.70 μg/mL, while other compounds exhibited weak to moderate or no cytotoxic activities (IC50> 20 μg/mL).

Zirconium nanoscaled metal–organic frameworks doped and co‐doped with Eu3+and/or Tb3+(ZrBDC:Eu3+,Tb3+) have been synthesized by hydrothermal method using 1,4‐dicarboxylic acid as linkers. The luminescence spectra obtained indicated that under 254 nm excitation, the as‐synthesized ZrBDC:Eu3+,Tb3+and ZrO2:Eu3+,Tb3+nanoparticles have multicolour visible emissions at 473, 591, 612 and 701 nm assigned to the 5D0→ 7F1, 5D0→ 7F2, 5D0→ 7F3and 5D0→ 7F4transition of Eu3+ions and at 488, 582 and 621 nm assigned to 5D4→ 7F, 5D4→ 7F5; 5D4→ 7F4and 5D4→ 7F3transitions of Tb3+ions, respectively. The X‐ray diffraction and field emission scanning electron microscopy results suggest that the ZrBDC:Eu3+,Tb3+nanoscaled metal–organic frameworks can be used as precursors to design the tetragonal phase of ZrO2:Eu3+,Tb3+nanoparticles with high purity and a narrow size distribution via heat treatment process. The as‐prepared ZrO2:Eu3+,Tb3+nanoparticles have size of about 10‐15 nm with BET multipoint surface area of 162 m2/g.

Using various chromatographic separations, five compounds (1–5) were isolated from a methanol extract of W. trilobataleaves. Their structures were elucidated to be paniculoside‐IV (1), 3‐O‐[β‐D‐glucopyranosyl(1‐4)‐β‐D‐glucoronopyranosyl] oleanolic acid 28‐O‐β‐D‐glucopyranosyl ester (2), 5,7,4'‐trihydroxyflavone (3), apigenin 7‐O‐β‐D‐glucopyranoside (4), and 3,4‐dihydroxy‐cinnamic acid (5), by detailed analysis via spectroscopic techniques (IR, 1D, 2D NMR and ESI‐MS data) as well as comparison with those reported. This is the first report of 2from Wedeliagenus. Furthermore, the effects of the isolated compounds on LPS‐induced NO production in RAW264.7 cells and cytotoxic activity (against A549, MCF‐7, Hep3B, and PC3 cell lines) were also evaluated.