The re-emergence of the GP73 and fucosylated liver cancer biomarkers

The study shows that GP73 alone may not be sufficient to achieve the discrimination in every population. This is because many other clinical factors may influence the levels of the biomarker. This review attempts to identify some of these clinical variables, and helps provide a means of using these clinical values, in combi- nation with GP73, to achieve the best use of the entire clinical biomarker family.     

基于二元混合自组装包裹纳米颗粒的微传感器抗体固定方法

采用二元混合自组装膜修饰纳米金颗粒,在经自组装单分子层修饰的金电极上阵列式排布,并通过共价键固定抗体形成生物敏感膜.采用原子力显微镜、扫描电镜和阻抗谱分别对电极表面的修饰过程进行了表征.纳米粒子在微电极表面均匀分布,没有明显的团聚,并且可实现抗体有效固定.基于标准互补金属氧化物半导体(Complementary met...     

Hydrolysate of corn starch saccharified with a dual-enzyme system and the effect on the crystallization of itaconic acid when used in fermentation

An improved process of hydrolysis of corn starch was adopted in the production of itaconic acid （IA）, the aim was to decrease the unfermentable reducing sugar （RS） in the medium from the beginning of the fermentation and to increase the crystallization efficiency of IA from the fermentation broth. The glucose （GS） syrups saccharified by several combinations of glucoamylase and pullulanase were investigated and used as the carbohydrate source of the fermentation medium for the spore-initiated submerged fermentations experiments. Compared with the conventional process （with pullulanase controlled）, the improved process decreased th.e RS residue in the fermentation broth from 3.01g/L to 1.35g/L and from 4.25g/L to 3.25g/L when the original RS of the medium were 100 and 120g/L, respectively. The crystallization efficiency of IA increased from 65% to 78.8% and from 69.58% to 82.81% with the original RS being 100 and 120g/L, respectively.     

按新标准诊断的糖尿病患者糖化血红蛋白分析

为探讨用新标准诊断的糖尿病患者是否存在过度糖化 ,即糖化血红蛋白 (HbA1c)增高 .对 56 8例患者进行口服 75g葡萄糖耐量试验 (OGTT) ,测定空腹血糖 (FPG)及OGTT 2h血糖浓度 ,同时测定空腹HbA1c水平 .结果表明 :FPG正常的患者HbA1c水平 91.0 %正常 ,9.0 %增高 ;在空腹血糖异常 (IFG)组中HbA1c水平正常者占 80 .0 % ,增高者 2 0 .0 % ;按新的空腹标准诊断为糖尿病的患者HbA1c水平 6 8.5%正常 ,31.5%增高 ;按旧的空腹标准诊断为糖尿病 (FPG≥7.8mmol·L- 1)的患者HbA1c水平 11.4 %正常 ,88.6 %增高 .笔者认为单纯FPG在 7.0～ 7.7mmol·L- 1的个体不应诊断为糖尿病 ,除非有证据显示存在过度糖化     

麦芽糖淀粉酶CDS 1-3在淀粉糖化过程中的作用分析

为探究多糖相互作用对淀粉糖化速率的影响，本研究使用较传统麦芽糖淀粉酶更具支链淀粉水解能力的麦芽糖淀粉酶CDS 1-3，将其与α-淀粉酶及糖化酶协同进行淀粉糖化，并对糖化液进行还原糖测定以及高效液相色谱分析。结果表明：反应到30 min时，CDS 1-3作用效果最明显，相比于Control组，CDS 1-3组糖化液的葡萄糖当量(Dextrose Equivalent,DE)值提高了4.51%。随着反应的进行，DE值提高速率降低。反应到60 min时，DE值提高了1.17%；反应到90 min时，DE值提高了2.12%。高效液相色谱结果显示，在整个反应过程中，CDS 1-3组葡萄糖和麦芽糖的产量始终高于Control组，说明CDS 1-3可有效加快木薯淀粉糖化速率，可应用于淀粉工业中。