将苏木提取液作为天然染料对改性腈纶纤维直接染色,通过探究苏木提取液用量、染色温度、染色时间及洗涤次数对改性腈纶苏木直接染色K/S值和染色特征值L*、a*、b*、C*、h°的影响,确定改性腈纶苏木直接染色的最佳工艺条件。实验结果...将苏木提取液作为天然染料对改性腈纶纤维直接染色,通过探究苏木提取液用量、染色温度、染色时间及洗涤次数对改性腈纶苏木直接染色K/S值和染色特征值L*、a*、b*、C*、h°的影响,确定改性腈纶苏木直接染色的最佳工艺条件。实验结果表明:当苏木提取液60 m L/L,80℃保温染色60 min时,可获得较高的K/S值和较好的耐洗色牢度。展开更多
Determination of brazilin by High Performance Liquid Chromatography （HPLC） method and measurement of the antioxidative and lipase inhibition effects in the Caesalpinia sappan wood from various locations in Indonesia...Determination of brazilin by High Performance Liquid Chromatography （HPLC） method and measurement of the antioxidative and lipase inhibition effects in the Caesalpinia sappan wood from various locations in Indonesia is described in this paper. Brazilin was separated from sample matrix using a reversed phase C 18, Shim-pack VP column with the mobile phase in a gradient elution for45 min from 5% to 100% methanol in 0.05% aqueous trifluoroacetic acid. Brazilin in ethanolic extracts ofC. sappan wood was in the range of 5.81 to 24.85 mg/g on dry-weight basis. Antioxidant and lipase inhibition activities expressed by IC50 values from all samples were in the range from 6.60 to 11.53 μg/mL and 50.76 to 203.21 μg/mL, respectively. Antioxidative and lipase inhibition potency of all ethanolic extracts were compared to vitamin C and chloramphenicol, isopropyl methylphenol and tetracyclin, respectively.展开更多
文摘将苏木提取液作为天然染料对改性腈纶纤维直接染色,通过探究苏木提取液用量、染色温度、染色时间及洗涤次数对改性腈纶苏木直接染色K/S值和染色特征值L*、a*、b*、C*、h°的影响,确定改性腈纶苏木直接染色的最佳工艺条件。实验结果表明:当苏木提取液60 m L/L,80℃保温染色60 min时,可获得较高的K/S值和较好的耐洗色牢度。
文摘Determination of brazilin by High Performance Liquid Chromatography （HPLC） method and measurement of the antioxidative and lipase inhibition effects in the Caesalpinia sappan wood from various locations in Indonesia is described in this paper. Brazilin was separated from sample matrix using a reversed phase C 18, Shim-pack VP column with the mobile phase in a gradient elution for45 min from 5% to 100% methanol in 0.05% aqueous trifluoroacetic acid. Brazilin in ethanolic extracts ofC. sappan wood was in the range of 5.81 to 24.85 mg/g on dry-weight basis. Antioxidant and lipase inhibition activities expressed by IC50 values from all samples were in the range from 6.60 to 11.53 μg/mL and 50.76 to 203.21 μg/mL, respectively. Antioxidative and lipase inhibition potency of all ethanolic extracts were compared to vitamin C and chloramphenicol, isopropyl methylphenol and tetracyclin, respectively.
