Ebringerová A, Hromádková Z, Hríbalová V, Mason T J
Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovak Republic.
Ultrason Sonochem. 1997 Oct;4(4):311-5. doi: 10.1016/s1350-4177(97)00041-2.
Changes in the structural, molecular and functional properties of the immunogenic corn cob xylan evoked by ultrasonication in water, 1% NaOH and 5% NaOH were investigated. The reduction of the high molar mass (MM) fraction was more intense than that of the medium MM fraction, depending on the sonic power, sonication time, and alkali concentration. The chain degradation was more effective in the alkaline media. The UV-absorbing component, accompanying the xylan polymers in the whole MM range, showed an accumulation in the high MM region as well as shiftening to higher sizes, particularly in 5% NaOH. The sugar composition and primary structure of the xylan was almost retained under all irradiation conditions studied. Although the biological activity of the xylan was affected by the ultrasound, no significant decrease of the biological response was found at short irradiation time and low sonic power.
研究了在水、1%氢氧化钠和5%氢氧化钠中超声处理引起的免疫原性玉米芯木聚糖的结构、分子和功能特性变化。取决于声功率、超声处理时间和碱浓度，高摩尔质量（MM）级分的减少比中等MM级分更强烈。在碱性介质中链降解更有效。在整个MM范围内与木聚糖聚合物相伴的紫外线吸收成分，在高MM区域出现积累以及向更大尺寸移动，特别是在5%氢氧化钠中。在所研究的所有辐照条件下，木聚糖的糖组成和一级结构几乎保持不变。虽然木聚糖的生物活性受到超声影响，但在短辐照时间和低声功率下未发现生物反应显著降低。
