Liu, Shaohua; He, Peixin; Tian, Zhaofu; Li, Xiaolan; Xu, Chunping published the artcile< Ultrasound-assisted extraction and characterization of pectic polysaccharide from oriental tobacco leaves>, Recommanded Product: Pyridazin-4-amine, the main research area is Nicotiana leaf pectic polysaccharide thermal stability antioxidant.
Ultrasound-assisted extraction (UAE) of pectic polysaccharide from oriental tobacco leaves was studied by orthogonal matrix method (L9(3)4). Furthermore, the crude polysaccharide was purified and two components (Fr-I and Fr-II) were obtained. FT-IR spectral anal. of the purified EPS revealed prominent characteristic groups. The monosaccharide composition anal. indicated the main composition between Fr-I and Fr-II was different. Furthermore, thermo gravimetric anal. (TGA) indicated the degradation temperature (Td) of the Fr-I (215 °C) was higher than those of Fr-II (162 °C). Detected by the pyrolysis GC/MS, though the main kinds of pyrolysis products from both Fr-I and Fr-II were similar, the larger amount of heterocycle and aromatic compounds liberated after hydrolysis of Fr-II. Finally, On the basis of the antioxidant activity test in vitro, Fr-II has stronger antioxidant activities than Fr-I. The thermal behavior and antioxidant activity might be attributed to the configuration of the sugar units and chem. compositions
Journal of the Chemical Society of Pakistan published new progress about Antioxidants. 20744-39-2 belongs to class pyridazine, and the molecular formula is C4H5N3, Recommanded Product: Pyridazin-4-amine.
Referemce:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem