The chemical constituents, pharmacological activity and traditional uses of 20 species attributed to the genus Elsholtzia （Labiatae） used in China are reviewed and compared. A survey of the literature available show...The chemical constituents, pharmacological activity and traditional uses of 20 species attributed to the genus Elsholtzia （Labiatae） used in China are reviewed and compared. A survey of the literature available shows that these species are used mostly for the treatment of respiratory and gastrointestinal disorders. Additionally, some of these Elsholtzia species show antibacterial, anti-inflammatory, relieving fever, analgesic activities and myocardial ischemia protection. Generally, the essential oils or flavonoids from these plant extracts are assumed to be the active principles.展开更多
Based on the polycondensation of bifunctional 2,2′-diamino-4,4′-bithiazole(DABT) and trifunctional 1,3,5-benzenetricarbonyl trichloride (BTC),a novel hyperbranched aromatic polyamide PBD was synthesized with excelle...Based on the polycondensation of bifunctional 2,2′-diamino-4,4′-bithiazole(DABT) and trifunctional 1,3,5-benzenetricarbonyl trichloride (BTC),a novel hyperbranched aromatic polyamide PBD was synthesized with excellent solubility and good thermal stability.The structure of the polymer was confirmed by FT-IR and 1H NMR spectrum.The calculated degree of branching of our product was 52%.By exploring the influence of several different solvent systems,the yield of the polymer increased in the solvent system of DMAc/LiCl.Two kinds of metal complexes were obtained by chelation of the polyamide with Cu2+ and Ni2+,and the metal contents of the complexes were determined by complexometric titration.The magnetic behaviors of the complexes were examined as a function of magnetic field strength at 5 K,and as a function of temperature (5–300 K) at a magnetic field strength of 2.4 × 106 A/m.The results indicated that the complexes were soft ferromagnetic materials with Curie-Weiss temperature at 102 K and 53 K,respectively.展开更多
文摘The chemical constituents, pharmacological activity and traditional uses of 20 species attributed to the genus Elsholtzia （Labiatae） used in China are reviewed and compared. A survey of the literature available shows that these species are used mostly for the treatment of respiratory and gastrointestinal disorders. Additionally, some of these Elsholtzia species show antibacterial, anti-inflammatory, relieving fever, analgesic activities and myocardial ischemia protection. Generally, the essential oils or flavonoids from these plant extracts are assumed to be the active principles.
基金supported by the National Natural Science Foundation of China (20674071)the National Basic Research Program of China (973 Program,2005CB623800)
文摘Based on the polycondensation of bifunctional 2,2′-diamino-4,4′-bithiazole(DABT) and trifunctional 1,3,5-benzenetricarbonyl trichloride (BTC),a novel hyperbranched aromatic polyamide PBD was synthesized with excellent solubility and good thermal stability.The structure of the polymer was confirmed by FT-IR and 1H NMR spectrum.The calculated degree of branching of our product was 52%.By exploring the influence of several different solvent systems,the yield of the polymer increased in the solvent system of DMAc/LiCl.Two kinds of metal complexes were obtained by chelation of the polyamide with Cu2+ and Ni2+,and the metal contents of the complexes were determined by complexometric titration.The magnetic behaviors of the complexes were examined as a function of magnetic field strength at 5 K,and as a function of temperature (5–300 K) at a magnetic field strength of 2.4 × 106 A/m.The results indicated that the complexes were soft ferromagnetic materials with Curie-Weiss temperature at 102 K and 53 K,respectively.
