A novel benzoxazine-based phenolic resin containing furan groups（PFB） was synthesized via simple two-step reactions and the structure of PFB was confirmed by FTIR and ~1H NMR spectra.Differential scanning calorimetr...A novel benzoxazine-based phenolic resin containing furan groups（PFB） was synthesized via simple two-step reactions and the structure of PFB was confirmed by FTIR and ~1H NMR spectra.Differential scanning calorimetry（DSC） showed that the polybenzoxazine cured from PFB had good heat resistance and lower polymerization temperature compared with that of benzoxazine-based phenolic resins.展开更多
A novel phenanthro [2,3-b] furan 1, named (3-hydroxy-9-(4′-hydroxy-3′-methoxyphenyl)-11-methoxy-5,6,9,10-tetrahydrophenanthro [2,3-b] furan-10-yl) methyl acetate, and two known phenolic compounds were isolated from ...A novel phenanthro [2,3-b] furan 1, named (3-hydroxy-9-(4′-hydroxy-3′-methoxyphenyl)-11-methoxy-5,6,9,10-tetrahydrophenanthro [2,3-b] furan-10-yl) methyl acetate, and two known phenolic compounds were isolated from the tubers of Pleione bulbocodioides (Franch.) Rolfe. Their structures were elucidated by spectroscopic methods.展开更多
基于高效液相色谱法建立了同时定量分析芒草60Coγ辐照降解副产物(包括酚类、呋喃类和有机酸等9种)的方法。结果表明,采用C18色谱柱,柱温25℃,以乙腈–0.01 mol(NH4)2HPO4(用磷酸调节p H至2.7)为流动相,梯度洗脱,流速为0.8 m L/min,多...基于高效液相色谱法建立了同时定量分析芒草60Coγ辐照降解副产物(包括酚类、呋喃类和有机酸等9种)的方法。结果表明,采用C18色谱柱,柱温25℃,以乙腈–0.01 mol(NH4)2HPO4(用磷酸调节p H至2.7)为流动相,梯度洗脱,流速为0.8 m L/min,多波长紫外检测,可实现对目标化合物的有效分离和测定,相对标准偏差为1.5%~2.3%,最低检出限为0.10~0.89 mg/L。在该条件下对经1 200 k Gy 60Coγ辐照处理的芒草水提液进行检测,检测出水提液中目标化合物对羟基苯甲酸、香草酸、丁香酸、4–羟基苯甲醛、香草醛、对香豆酸、糠醛、甲酸、乙酸的质量浓度分别为17.78、12.43、3.26、15.40、10.18、16.42、2.52、102.29、86.24 mg/L。展开更多
基金supported by project of Hubei Provincial Department of Education,China(No.Q20083003)the Innovative Team of Huangshi Institute of Technology.
文摘A novel benzoxazine-based phenolic resin containing furan groups（PFB） was synthesized via simple two-step reactions and the structure of PFB was confirmed by FTIR and ~1H NMR spectra.Differential scanning calorimetry（DSC） showed that the polybenzoxazine cured from PFB had good heat resistance and lower polymerization temperature compared with that of benzoxazine-based phenolic resins.
文摘A novel phenanthro [2,3-b] furan 1, named (3-hydroxy-9-(4′-hydroxy-3′-methoxyphenyl)-11-methoxy-5,6,9,10-tetrahydrophenanthro [2,3-b] furan-10-yl) methyl acetate, and two known phenolic compounds were isolated from the tubers of Pleione bulbocodioides (Franch.) Rolfe. Their structures were elucidated by spectroscopic methods.
