A novel enzyme-linked immunosorbent assay for the detection of Wx-B1 null wheat lines using a monoclonal antibody and its application for the detection of marker heterogeneity within commercial cultivars

A monoclonal antibody was raised with specificity for the granule bound starch synthase (GBSS1) Wx-B1 homeoallele of wheat (Triticum aestivum L.) using a synthetic peptide immunogen. This was used to develop a simplified enzyme-linked immunosorbent assay (ELISA) for the discrimination of Wx-B1a and Wx-B1b alleles which differ in the starch properties they confer. Discrimination of these alleles is important for the selection of wheat lines for Udon-style noodle production. The simplified ELISA worked in a single antibody (indirect) format and gave improved ease of use, discrimination of alleles and resolution relative to a previously developed 2-antibody (sandwich) ELISA. When the test was validated using breeders seed of a panel of commercial cultivars, heterogeneity of Wx-B1 alleles was observed for a significant proportion of the cultivars tested and this was confirmed using PCR analysis of the Wx-B1 and Wx-A1 genes. This observation has implications for cultivar wheat quality assessment, the application of molecular markers for variety identification purposes and the establishment of mapping populations from commercial cultivars.     

不同厂家牛黄解毒片质量的灰色模式识别研究

在灰色关联分析的基础上,构建了一个评价中药质量的模式识别模型,并将其用于不同厂家牛黄解毒片质量的评价。综合评价结果与实际情况基本相符。与统计模式识别模型比较,灰色模式识别具有计算简便、适应范围广的特点。     

氟铃脲50％水分散粒剂的研制

介绍了氟铃脲50％水分散粒剂的制备方法,简述了该制荆的特点、配方选择、质量技术标准、贮藏稳定性。试验结果表明,该产品悬浮率90％以上,崩解时间〈60s,热贮（54℃±2℃,14d）分解率〈5％,产品各项指标符合水分散粒剂的要求。     

HPLC法测定清肺颗粒中甘草酸的含量

利用高效液相色谱法测定清肺颗粒中甘草酸的含量。采用C18柱(5 μm,4.6 mm×250 mm),在室温下,以甲醇-0.2mol/L醋酸铵溶液-冰醋酸(66:33:1,V/V/V) 为流动相,250nm为检测波长,流速1.0mL/min。结果表明,甘草酸在 4.90～195.90 μg/mL范围内,线性关系良好(r=0.9999),平均回收率为 91.96 %,RSD为3.41 % 。本方法简单快捷,精密度好,可用于控制清肺颗粒中甘草酸的含量。     

景参麦颗粒成型工艺及薄层色谱鉴别研究

目的 本研究依据满医药临床经验方开发一种颗粒剂——景参麦颗粒,依据单因素试验和正交试验法优选最佳成型工艺,为其开发和质量标准建立进行初步探索.方法 以颗粒成型率和溶化性为考察指标,优选其制备工艺,对方中红景天、人参和白术进行薄层色谱鉴别,并对制剂进行检查.结果 景参麦颗粒最佳成型工艺为浸膏粉:麦芽糊精:乳糖=2:2:1...     

The SAHGA model to calculate the Spatial Ammoniacal Heterogeneity at the soil surface after fertiliser Granule Application

After dissolution of fertiliser granules, a high nitrogen concentration is recovered in the immediate vicinity of granules, which may enhance damaging processes like nitrite accumulation or ammonia volatilisation. Based on the diffusion equations of Cranck, the granule-soil microsite was modelled to obtain the actual fertilised surface plot and the effective rate of N application on this surface. Parameterisation of the diffusion coefficient of solutes consisted of a temperature and soil texture correction. The model was tested against an experimental data set obtained from soil incubations at two soil water contents (21.2% m³ m^–3 and 28.3% m³ m^–3) and two temperatures (4°C and 25°C) by comparing NH₄⁺ recovery at various distances from the granules. The simulated radius of the granule-soil microsite was more affected by the water content than by the temperature. The model is very accurate because 95–100% of total NH₄⁺ applied was recovered in the modelled surface depending on the experimental conditions (temperature and water content). The model was simple enough to be easily integrated into larger models dealing with surface-applied granule fertilisers.     

莲藕淀粉的颗粒特性研究

[目的]为莲藕产品的开发、工艺制定和品质控制提供理论依据。[方法]从特定品种的莲藕中分离纯化出莲藕淀粉,研究莲藕淀粉及其级分的颗粒特性。[结果]莲藕淀粉成分含量为:水分14.17%、灰分0.95%、粗蛋白0.34%、粗脂肪0.28%、总磷14.50 mg/100 g、直链淀粉24.76%。莲藕淀粉有圆形和椭圆形颗粒,其粒径分别为14.30、61.48μm。天然莲藕淀粉的晶体结构为B型,直链淀粉为V型,支链淀粉无明显晶体结构。天然淀粉及其级分的晶体崩解温度与起始玻璃化温度均较接近,但晶体崩解所需热量差别较大。莲藕淀粉的糊化温度为65.8~73.8℃。淀粉溶解度和膨胀度随温度的升高而增大。[结论]莲藕淀粉在95℃的膨胀度为24.497,属于中等膨胀型淀粉。     

茵栀解毒颗粒保护肝损伤药理作用的研究

【摘 要】：为评价茵栀解毒颗粒对肝损伤保护的药理作用,采用四氯化碳引起小鼠肝损伤模型,考察茵栀解毒颗粒保护肝损伤的作用。结果显示,茵栀解毒颗粒对肝脏指数影响差异不显著,中剂量组ALT显著低于阳性对照组（P＜0.05）,AST极显著低于阳性对照组（P＜0.01）,ALP各试验组与阳性对照组均无显著差异（P＞0.05）;低剂量组CAT活力显著高于阳性对照组（P＜0.05）,高剂量组SOD极显著高于阳性对照组（P＜0.01）,CAT显著高于阳性对照组（P＜0.05）;肝脏组织切片显示,低剂量组大部分动物的肝脏细胞形态均正常,未见变性、死亡等现象,中剂量组和高剂量组的肝组织结构正常。表明茵栀解毒颗粒具有明显的保护肝损伤的作用。     

解毒化瘀方对凝血酶合并缺氧诱导PC12细胞损伤ERK1/2信号通路表达的影响

目的 探讨急性缺血性中风（AIS）瘀毒病机的分子机制及解毒化瘀方对凝血酶合并缺氧损伤的保护作用。方法 （1）用凝血酶合并缺氧损伤PC12细胞,模拟急性缺血性中风的体外细胞模型。（2）将细胞分为空白组,模型组,解毒化瘀方含药血浆组和PD98059组（MEK抑制剂组）,应用荧光定量实时RT-PCR方法检测MEK1、PAR-1及ERK1/2的mRNA表达,应用免疫荧光法检测ERK1/2、P-ERK1/2的蛋白表达。结果 PCR结果提示：模型组MEK1、PAR-1及ERK1/2的mRNA表达与空白对照组相比显著升高（P<0.01）,解毒化瘀方组和PD98059组MEK1、PAR-1及ERK1/2的mRNA表达较模型组显著降低（P<0.01）,免疫荧光结果提示：解毒化瘀方组和PD98059组ERK1/2、P-ERK1/2的蛋白表达较模型组显著降低（P<0.01）。结论 解毒化瘀方以凝血酶为作用的分子靶点,能够显著降低ERK1/2信号通路在缺血性中风体外细胞模型中的表达。     

健脾解毒方对大肠癌细胞mTOR信号通路相关蛋白表达的影响

目的 探讨健脾解毒方对大肠癌细胞增殖的影响及可能作用机制。方法 采用水提法制作健脾解毒方提取物,利用超高效液相-高分辨飞行时间质谱法分析健脾解毒方的主要成分,MTT法检测健脾解毒方对大肠癌细胞增殖的影响,Graphpad Prism5软件计算IC₅₀值,流式细胞术检测细胞周期,Western Blot技术检测Phospho-mTOR、Phospho-P53和P21的蛋白表达。结果 健脾解毒方能够抑制大肠癌细胞增殖,处理24、48、72 h后四种大肠癌细胞系的IC₅₀值分别为HCT116（6.894、5.668、3.648 mg/mL）、LoVo（14.65、8.737、7.849 mg/mL）、SW48（8.029、7.026、5.740 mg/mL）及HT29（13.06、9.646、8.448 mg/mL）;健脾解毒方使大肠癌细胞周期阻滞在G1期;并能够下调Phospho-mTOR蛋白表达（P<0.05）,上调Phospho-P53和P21蛋白的表达（P<0.05）,使大肠癌细胞周期阻滞在G1期。结论 健脾解毒方可能通过mTOR-P53-P21途径抑制大肠癌细胞的增殖,这可能是健脾解毒方治疗大肠癌的作用机制之一。