微波对红法夫酵母的诱变效应的研究

利用微波诱变技术对红法夫酵母(Phaffia rhodozyma TY-Ⅰ)进行了诱变。结果表明,红法夫酵母TY-Ⅰ对微波辐照非常敏感(120s时菌株存活率只有4.67%)。在最佳处理时间100s,加盖冷却的条件下进行微波诱变、二苯胺推理筛选,最终筛选获得1株遗传稳定性良好,虾青素产量高的突变菌株TY-Ⅰ-8,虾青素含量较出发菌株提高了102.51%。     

发酵法提取燕麦β-葡聚糖的初步探索

研究了发酵法对提取燕麦麸皮中的β-葡聚糖的影响,比较了发酵液中β-葡聚糖的含量。结果显示,4种酵母菌发酵后发酵液中β-葡聚糖含量都比未经过发酵的燕麦麸培养液中β-葡聚糖含量明显增加。采用酵母发酵的方法提取燕麦β-葡聚糖的最优发酵条件:发酵培养基在灭菌前加蛋白酶、淀粉酶和糖化酶共同处理,所用菌种为黄酒酵母,发酵时间控制在48h;摇床参数为170r/min,28℃。     

自交联型苯丙乳液替代PVA作为印刷纸张表面施胶剂

以N-羟甲基丙烯酰胺（N—MA）作为自交联剂,采用预乳化种子乳液聚合法制备了自交联型苯丙乳液。该乳液与淀粉复配制取的表面施胶液对新闻原纸进行表面施胶时,成纸施胶度可达16s,表面强度达2．04m·s^-1,均优于2倍（对苯丙乳液）绝干PVA量所配置的施胶液,且相比成本有较大幅度降低,可以替代PVA作为印刷纸张表面施胶剂。     

多功能编织机控制系统的设计开发

介绍了多功能编织机的工作原理及编织过程中对各部件的动作要求,设计了一种基于嵌入式工业控制计算机和数字信号控制器为核心的控制系统,该系统通过使用3台伺服电机为系统提供动力,以增加系统软、硬件复杂性为代价,减少了机械零件的使用量,消除了机械传动机构对整个编织机运行速度的影响,提高了编织机的工作效率.文中详细阐述了系统的总体结构及软、硬件实现方法.实际应用表明该控制系统简化了多功能编织机的结构,具有较高的性价比,良好的实用性、稳定性和可靠性.     

灰灰菜提取物体外抑菌活性的研究

目的：探讨灰灰菜的体外抑菌活性。方法：分别用石油醚、氯仿、乙酸乙酯对灰灰菜65% 乙醇提取物进行萃取,然后用滤纸片扩散法和最低抑菌浓度法(MIC)检测3 种萃取物对7 种人体常见致病菌生长的影响。结果：石油醚、氯仿萃取物对供试菌均无明显抑制作用,而乙酸乙酯萃取物的抑菌活性很强,其对大肠杆菌的最小抑制浓度(MIC)小于1.56mg/ml,对绿脓杆菌、金黄色葡萄球菌、枯草芽孢杆菌、藤黄微球菌的MIC 分别为3.13、6.25、6.25、12.5mg/ml,而对粪肠球菌和白假丝酵母的MIC 均大于50mg/ml。结论：乙酸乙酯萃取物对细菌具有明显的抑制作用,且对革兰氏阴性菌的抑制效果强于革兰氏阳性菌,但对真菌的抑制作用不明显。     

基于PSD-BPA的电网潮流稳定计算分析平台开发与应用

PSD-BPA是电力规划工作者必用的计算软件之一。随着中国电网高速发展,智能电网的推进,特高压交/直流输电网络的建设,电网逐渐形成了全国联网的格局。传统PSD-BPA软件集成应用环境功能单一、智能化程度低、计算结果应用难,一定程度上影响了电力规划设计工作的效率。为增强计算工具,提升工作效率,利用在线预决策系统平台已取得的研发成果,移植其先进的电网辅助分析功能,开发了一套基于PSD-BPA,集友好人机界面、高效电网建模、自动多核并行计算、智能辅助分析决策等诸多新功能为一体的电网潮流稳定计算分析平台。大量实际工程应用表明,平台界面友好、智能高效、计算快捷、辅助决策功能正确有效。     

Regulation of the immune system by synthetic polynucleotides. VI. Amplification of the immune response in young and aging mice

Model systems for study of the action of adjuvants in immunodeficient states were developed in 10- to 14-day-old BALB/aj mice and aging BALB/aj mice (12 to 16 months). With sheep red blood cells as antigen polyadenylicpolyuridylic acid complexes (poly A:U) were found to be stimulatory in both the neonatal and aging mice. The effect of poly A:U was similar to that seen when 5 X 10(6) thymocytes from immunologically mature mice were given with antigen. Cell-free supernatant fluids induced by incubation of poly A:U with thymocytes likewise were capable of restoring the number of antibody-forming cells to normalcy in aging mice.     

Flaujeac factor deficiency. Reconstitution with highly purified bovine high molecular weight-kininogen and delineation of a new permeability-enhancing peptide released by plasma kallikrein from bovine high molecular weight-kininogen

Flaujeac trait is the functional deficiency of a plasma protein of the intrinsic coagulation, kinin-forming, and plasma fibrinolytic pathways. The Flaujeac factor in man has been isolated and tentatively identified as a kininogen of high molecular weight (HMW). Highly purified bovine HMW-kininogen, but not bovine low molecular weight kininogen, repaired Flaujeac factor deficiency. The two subspecies of this molecule, HMW-kininogen a and HMW-kininogen b, also corrected Flaujeac factor deficiency. When bovine HMW-kininogen was incubated with bovine plasma kallikrein, kinin-free HMW-kininogen, bradykinin, and a glycopeptide fragment (peptide 1-2; 12,584 daltons) were rapidly released. None of these fragmentation products corrected Flaujeac factor deficiency alone or in mixtures. The function of HMW-kininogen appeared to depend upon the structural integrity of the native molecule. When injected in concentrations of 2 pmol-8 nmol/0.1 ml, peptide 1-2 caused increased vascular permeability in rabbits, rats, or guinea pigs. The enhanced permeability was maximal within 1-2 min and terminated in 5-10 min, differing from that of bradykinin or histamine. Injected together in equimolar amounts, peptide 1-2 and bradykinin produced a synergistic permeability response which was immediate in onset as well as prolonged in duration. Peptide 1-2 is a rapidly acting, highly basic glyco-peptide which mediates increased vascular permeability in a complementary and synergistic manner with bradykinin.     

填充柱超临界CO2流体色谱制备拆分4种外消旋γ-内酯香料

填充柱超临界CO2流体色谱是近年发展的一种绿色高效色谱分离技术。本文采用填充柱超临界CO2流体色谱对外消旋γ-辛内酯、γ-癸内酯、γ-十一内酯、γ-十二内酯4种香料进行制备规模手性拆分。色谱柱Chiralpak AD 250mm×10mm10μm,柱温、柱压、改性剂等参数在前期分析研究基础上设定。调节流动相流速、样品浓度得较佳分离通量,并进行制备性分离,结果:γ-辛内酯,上样2mg/次,每次运行9min,180min分离40mg,回收率(以2个对映体计,下同)66.3%;γ-癸内酯,上样0.8mg/次,每次运行9min,180min分离16mg,回收率68.1%;γ-十一内酯,上样0.8mg/次,每次运行11min,220min分离16mg,回收率64.4%;γ-十二内酯,上样0.7mg/次,每次运行11min,220min分离14mg,回收率71.4%。上述分离制备所得对映体的光学纯度(e.e%)均为100%。     

超声波法提取红景天多糖

研究用超声波技术提取红景天多糖，考察了超声波功率，浸提固液比，超声波处理时间，原料的粉碎粒度对多糖提取率的影响，并以正交试验设计优化工艺条件，结果表明：影响红景天多糖提取率因素的主次关系是粒度〉功率〉时间〉浸提固液比。最佳提取工艺条件为超声功率675W，固液比为1：40，超声处理时间为15min，颗粒度为100目，多糖提取率为2．63％。