香港牡蛎是我国南方高产低值的一种海洋贝类。为了提高其附加值,本研究以香港牡蛎为原料,通过酶法水解结合细胞实验对酶解产物及其超滤组分进行组成特点分析和免疫活性评价。结果表明:牡蛎酶解产物及各超滤组分分子量分布主要集中在<...香港牡蛎是我国南方高产低值的一种海洋贝类。为了提高其附加值,本研究以香港牡蛎为原料,通过酶法水解结合细胞实验对酶解产物及其超滤组分进行组成特点分析和免疫活性评价。结果表明:牡蛎酶解产物及各超滤组分分子量分布主要集中在<2.5 k Da范围内,含量达53.00%~85.00%,且氨基酸组成齐全;牡蛎酶解产物可促进脾淋巴细胞和腹腔巨噬细胞的免疫功能,各超滤组分(>10、10~5、5~2.5和<2.5 k Da)在浓度为0.25~4.0 mg/m L范围内,其体外免疫活性强弱具有一定的浓度相关性,且<2.5 k Da组分和5~2.5 k Da组分的免疫功能优于其他组分。牡蛎酶解产物各超滤组分中<2.5 k Da组分和5~2.5 k Da组分可作为进一步研究的对象。展开更多
Tosyl cellulose sulfate sodium and chitosan ultra thin films were self assembled through electrostatic attraction on the positively charged quartz substrate. The morphologies obtained by AFM demonstrated that the arra...Tosyl cellulose sulfate sodium and chitosan ultra thin films were self assembled through electrostatic attraction on the positively charged quartz substrate. The morphologies obtained by AFM demonstrated that the arrangement of the polymer chains transformed from original irregularity into well alignment and the thickness of the films was around 1-2 nm. The films were stable enough for constructing functional ultrathin films.展开更多
文摘香港牡蛎是我国南方高产低值的一种海洋贝类。为了提高其附加值,本研究以香港牡蛎为原料,通过酶法水解结合细胞实验对酶解产物及其超滤组分进行组成特点分析和免疫活性评价。结果表明:牡蛎酶解产物及各超滤组分分子量分布主要集中在<2.5 k Da范围内,含量达53.00%~85.00%,且氨基酸组成齐全;牡蛎酶解产物可促进脾淋巴细胞和腹腔巨噬细胞的免疫功能,各超滤组分(>10、10~5、5~2.5和<2.5 k Da)在浓度为0.25~4.0 mg/m L范围内,其体外免疫活性强弱具有一定的浓度相关性,且<2.5 k Da组分和5~2.5 k Da组分的免疫功能优于其他组分。牡蛎酶解产物各超滤组分中<2.5 k Da组分和5~2.5 k Da组分可作为进一步研究的对象。
文摘Tosyl cellulose sulfate sodium and chitosan ultra thin films were self assembled through electrostatic attraction on the positively charged quartz substrate. The morphologies obtained by AFM demonstrated that the arrangement of the polymer chains transformed from original irregularity into well alignment and the thickness of the films was around 1-2 nm. The films were stable enough for constructing functional ultrathin films.
