草莓试管苗分化培养基优化的研究

本研究采用三种培养基（A3、F、MS）进行草莓分化对比试验．结果表明我们研制的A3基对草莓试管苗分化有明显促进作用．连续培养11周,A3的草莓苗总分化率是F基的1．25倍,是MS基的1．51倍。而且,A3基成本低于其它两基。A3、F和MS无机盐含量分虽为：1782．58mg／L、2868．33mg／L和4633．33mg／L。无机盐种类的合理配比及其低浓度有利于草莓试管的分化培养。     

剩余培养基对长春花愈伤组织和细胞培养的影响(简报)

剩余培养基对愈伤组织和悬浮细胞的生长及积累吲哚生物碱均有促进作用。     

均匀设计法优化灰树花深层培养基配方

系统研究了碳源、氮源、无机盐、维生素等培养基因素对灰树花深层发酵菌丝体产量的影响 ,并通过均匀设计法优化了发酵培养基配方。结果表明 :4 6 %玉米粉、3 5 %豆饼粉、0 1%葡萄糖、0 32 %KH2 PO4 、0 0 1%MgSO4 、少量VB1的培养基配方可使菌丝体产量达到最大。采用此配方试验 ,菌丝体产量平均值达 1 77± 0 0 6g/10 0mL。     

用正交试验法筛选樟芝菌适宜发酵培养基

用正交试验法对樟芝菌 (AntrodiacamphorataZang&Su)的发酵培养基进行了研究。选取马铃薯淀粉、葡萄糖、麦芽糖、酵母膏、蛋白胨、麸皮、KH2 PO4 、MgSO4 ·7H2 O等作为试验因素 ,采用L2 7(31. 3)正交表设计五因素、三水平的正交试验 ,对所选各因素的添加量分别作了试验 ,对菌丝干重和发酵液多糖含量结果作了方差分析 ,确定了合适的发酵培养基。试验结果表明 :樟芝菌的深层发酵适宜培养基是 :马铃薯淀粉 1 .0 0 % ,葡萄糖2. 0 0 % ,酵母膏 0 . 10 % ,蛋白胨 0 . 10 % ,麸皮 1 .0 0 % (或 0. 5 0 % ) ,KH2 PO4 0 . 10 % ,MgSO4 ·7H2 O 0 . 0 5 %。     

试验设计和优化及其在发酵培养基优化中的应用

在发酵工业中,发酵培养基的优化对发酵水平的提高起着举足轻重的作用。而在寻求最佳发酵培养基的过程中,试验设计及统计优化发挥着重要作用。对近年来常用的试验设计及优化方法进行了综述,内容包括单因素轮换法、析因设计、均匀设计、响应面设计、人工神经网络和遗传算法等多种试验设计和优化方法,并对其进行分析和比较。     

发酵培养基的模式识别法优化

应用模式识别法优化发酵培养基,以培养基组成构筑模式空间,线性降维揭示可视优化区,再以多因素轮换优化实现由低维到高维的回复,得到最佳培养基组成。     

施万细胞条件培养基对大鼠骨髓间质细胞的诱导分化作用

目的　探讨施万细胞条件培养基对大鼠骨髓间质细胞的诱导分化作用。方法　从大鼠骨髓中分离培养间质细胞并传至第 6代 ,诱导前 2 4h加 1μg·L-1碱性成纤维生长因子 (bFGF)入培养液中以促分裂 ,再以施万细胞条件培养基作诱导剂 ,观察细胞形态的变化 ,并采用免疫组织化学法对诱导后一周的细胞进行Map 2及NSE、GFAP表达的检测。结果　诱导后 48小时间质细胞在形态上表现为神经元样 ,神经元样细胞呈Map 2及NSE阳性 ,而GFAP显阴性。结论　施万细胞的上清液能诱导骨髓间质细胞分化为神经元样细胞。     

正交试验设计法考察苏云金杆菌“140”－51培养基

我们运用了正变试验设计法对经过复壮、紫外线照射处理的苏云金杆菌“１４０”－５１菌株进行培养基的考察,采用Ｌ２７（３１３）的正交表来安排培养基中影响发酵单位的几个主要因子［１．２．３］,其它试验条件固定为;培养温度３０±１℃,１５ｍｌ装量／５００ｍｌ三角瓶,摇床转速２１０ｒ／ｍｉｎ,ｐＨ值控制在每一配比培养基灭菌后为ｐＨ６．８～７．２范围内。     

化学法研究长春花细胞胞内产物释放行为

对不同生理状态下细胞对外界刺激的反应情况进行了比较;研究了EDTA、氮酮、甲壳素做为长春花细胞渗透剂所使用的条件;探讨了它们影响胞内产物释放的短期效应、长期效应及长时间处理所造成的叠加效应。     

应用正交设计方法优化香蕉外植体直接出芽的条件

利用正交设计方法（L27（3^13)]研究了培养基中的植物生长调节物BAP,NAA和IBA,以及不同外植体对香蕉（Musa acuminata Colla.cv.Williams) 直接出芽频率的影响,外植体的不同是影响香蕉直接出芽频率的最主要因素,NAA和IBA对实验结果的影响相同,均弱于BAP,实验结果的统计分析表明,诱导香蕉外植体直接出芽的优选培养基为不添加BAP,NAA和IBA的MS基本培养基,最佳外植体为芽的顶端分生组织部分。     

MEDIUM OPTIMIZATION OF ANTIFUNGAL ACTIVITY PRODUCTION BY Bacillus amyloliquefaciens USING STATISTICAL EXPERIMENTAL DESIGN

In order to overproduce biofungicides agents by Bacillus amyloliquefaciens BLB371, a suitable culture medium was optimized using response surface methodology. Plackett–Burman design and central composite design were employed for experimental design and analysis of the results. Peptone, sucrose, and yeast extract were found to significantly influence antifungal activity production and their optimal concentrations were, respectively, 20 g/L, 25 g/L, and 4.5 g/L. The corresponding biofungicide production was 250 AU/mL, corresponding to 56% improvement in antifungal components production over a previously used medium (160 AU/mL). Moreover, our results indicated that a deficiency of the minerals CuSO₄, FeCl₃ · 6H₂O, Na₂MoO₄, KI, ZnSO₄ · 7H₂O, H₃BO₃, and C₆H₈O₇ in the optimized culture medium was not crucial for biofungicides production by Bacillus amyloliquefaciens BLB371, which is interesting from a practical point of view, particularly for low-cost production and use of the biofungicide for the control of agricultural fungal pests.     

均匀设计法优选芝麻油提取新工艺

本文通过超临界CO2提取芝麻油的均匀设计实验和微波和超声波诱导提取芝麻油的正交实验比较,考察影响提取的主要因素,寻求最佳萃取工艺。超临界CO2萃取最佳工艺条件为：压力32MPa,温度60℃,CO2流量31kg／h,萃取时问80min,得率46．39％;微波萃取最佳工艺条件为：溶剂为丙酮,物料与溶剂比例1：7,辐射时间7min,辐射功率810W,得率23．01％。超声波萃取最佳工艺条件为：物料与溶剂比例1：7,溶剂为石油醚,浸泡时间30h,得率23．99％。结果表明超临界CO2萃取芝麻油品质最好,而且萃取也最高,质量最稳定。     

猪血浆制备研究—正交设计法

按照多因素多水平的正交实验结果,制备猪血浆的最佳条件是猪血与8％柠檬酸三钠溶液体积比19:1,离心时间10分钟,转速1200转/分。用此条件制备的猪血浆与羊血浆进行对比试验,证明猪血浆可以用于肝素钠抗凝血效价测定。     

STATISTICAL OPTIMIZATION OF A NOVEL LOW-COST MEDIUM BASED ON REGIONAL AGRO-INDUSTRIAL BY-PRODUCTS FOR THE PRODUCTION OF PROTEOLYTIC ENZYMES BY Bacillus cereus

Bacillus sp. are specific producers of peptidase amongst bacteria and peptidase enzymes and are of significant ones due to their multifarious applications. Advances in industrial biotechnology offer potential opportunities for economic utilization of agro-industrial by-products for many biochemical reactions. Due to their rich organic nature, they can serve as an ideal substrate for the production of different value added products like peptidases. In the present work, an attempt was made to optimize different variables by Taguchi methodology for the production of peptidase using agro-industrial by-products hydrolyzed by a Bacillus cereus strain, resulting in brewer's spent grain (BSG) being the optimal organic substrate. Subsequently, operative variables for the BSG were investigated using Taguchi methodology in order to maximize the enzyme production. Additionally, the main medium components were optimized using a mixture design. Finally, the production of peptidase by B. cereus was investigated; also the possible interaction with other proteolytic microbial strains was evaluated. A notorious synergistic effect was observed when B. cereus was inoculated with Pseudomonas sp. These brought a triple benefit, first, opening the possibility to produce technical enzymes at low cost, second, giving greater value to a food industry by-product, and third, reducing the environmental impact caused by the product removal directly into the environment.     

SAMPLE SIZE ESTIMATION FOR GENE ACTION ANALYSIS BY USING ORTHOGONAL CONTRAST

IIntroductionTheuseofrestrlctlonfragmentlengthpolymorphism（RFLP）markershasgreatlyslmpllfledthegeneticanalysisofquantitativetraits,providingareliableandextensiveframeworkofquantltatlvemarkerstowhichquantltatlyetyaitIOCI（QTL）clnhilinked［‘］．TodetectthelinkagebetwwenRFLPmarkersandPhenotyPlcvariationsoh－served,generallinearmodelofanalysisofvariance（ANOVA）hasbeenextensivelyusedL‘zJ．ByusingF、populations,thecompletegeneticInformation,thatIs,thethreegenotypesofageneticfact…     

长春花(Catharanthus roseus)培养物中长春朵灵和泻花碱的薄层色谱分离

对长春花(Catharanthus roseus)纵生芽中长春朵灵和泻花碱进行薄层色谱分离。讨论了吸附剂、溶剂系统对长春朵灵和泻花碱比移值(R_t)的影响。给出了不同系统下长春朵灵和泻花碱的R_t的值。     

正交法测定钉螺离体GPT反应的最佳条件

钉螺是日本血吸虫幼虫的唯一中间宿主, 药物灭螺是阻断日本血吸虫病传播的有效方法。由于化学灭螺药物的生产和使用对环境和非靶标生物均产生严重污染和毒害作用, 因而低毒、易分解的植物灭螺药物研究受到重视,已筛选出诸如黄姜(Dioscorea zingberensis C.H.Wright, DZ)、吉祥草(Reineckea carnea, RC)等皂甙类植物灭螺剂1,2。       

数理统计方法优化单细胞蛋白发酵培养基研究

采用正交试验和中心组合设计相结合的数理统计方法,在２Ｌ发酵罐中对紫云英汁液培养单细胞蛋白发酵培养基进行筛选、优化,试验结果表明较优培养基为：初糖２．３％,酵母粉０．１６％,ＫＨ_２ＰＯ_４０．２％,ＭｇＳＯ_４０．０５％。酵母浓度最高达１０．４６ｇ／Ｌ,基质生长得率为０．５５ｇ菌体／ｇ基质,基质转化率为８３％。研究结果同时说明采用数理统计方法设计实验,工作量小,效率高,结果准确。