A novel magnetic β-cyclodextrin modified graphene oxide adsorbent with high recognition capability for 5 plant growth regulators.

β-Cyclodextrin (β-CD) modified magnetic graphene oxide material (FeO@SiO/GO/β-CD), a novel magnetic sorbent for enrichment and purification of plant growth regulators (PGRs) in vegetables prior to gas chromatograph mass spectrometer (GC-MS) detection, was successfully fabricated. The novel magnetic sorbent geometrically fitted to selectively recognize and enrich PGR analytes especially containing aromatic structure. The selectivity experiment demonstrated the higher selectivity of FeO@SiO/GO/β-CD toward 5 PGR compounds than that of FeO@SiO/GO.

[Effects of TNBG on the proliferation and apoptosis of human hepatocellular carcinoma cell line QGY-7701].

Objective: To investigate the effects and mechanism of TNBG on the proliferation and apoptosis of human hepatocellular carcinoma cell line QGY-7701.

Methods: The 3H-TdR incorporation and MTT assay were used to test the effects of anti-proliferation and cytotoxicity respectively, the morphological changes of the cancer cells were examined under light and electron microscopes. The Flow cytometric analysis was performed to detect the cell cycle distribution and apoptosis.