椎间盘脊柱炎致犬后肢瘫痪的病例分析

椎间盘脊柱炎主要是由感染性因素引起椎体和椎间盘共同发生炎症的一种疾病,可导致犬双后肢瘫痪,现代医学一般通过长期服用抗生素进行治疗,但效果并不理想。论文分析1例从中兽医角度诊治犬后肢瘫痪的病例,经影像学检查诊断为椎间盘脊柱炎,同时采用中兽医辨证方法,进行内服中药、外用中药离子导入、针灸和激光联合治疗,患犬在治疗约2个月后完全恢复行走能力。

Ultrasound-promoted Lipase-catalyzed Enantioselective Transesterification of (R,S)-Glycidol

Enantioselective transesterification of glycidol with vinyl butyrate as an acyl donor was investigated in the presence of Bacillus subtilis lipase（BSL2） as catalyst. Comparison studies demonstrate the advantage of ultrasound over the conventional shaking for the enzymatic reaction in non-aqueous media. The effects of reaction conditions（ultrasound power, temperature, water activity and pH） on the activity and enantioselectivity were also investigated. Under the optimum conditions, the synthetic activity of BSL2 was 2.95 μmol？min？1？mg？1 and the enantioselectivity（E value） was 52.2. Compared with conventional shaking, ultrasound made the synthetic activity and the enantioselectivity increase 9.5-fold and 1.4-fold, respectively. Furthermore, the repeated use of BSL2 for five cycles resulted in no obvious loss of enzyme activity, suggesting that the enzyme is stable under low power ultrasound conditions.

物流行业中用户隐私保护方法研究

以快递物流行业中用户隐私信息保护问题作为主要研究对象,设计了一种利用射频识别技术和多层加密技术保护用户隐私的方案。该方案能够实现面向物流公司内部和外部的双重隐私保护,同时保证了隐私信息泄露的责任人可审查性。