大树杜鹃组织培养技术研究

选用大树杜鹃试管苗的带芽茎段进行离体培养,通过正交试验设计并结合方差分析、多重比较从中选出了大树杜鹃组织培养的最佳培养基配方,建立起了大树杜鹃离体培养体系.结果表明:TDZ是适合大树杜鹃离体培养的细胞分裂素,带芽茎段增殖培养基为WPM+TDZ0.40 mg/L+IBA0.05 mg/L;壮苗培养为WPM+TDZ0～0.10mg/L+IBA0.40mg/L+AC0.20%或者TDZ0.10～0.20mg/L+NAA0.20mg/L+AC0.20～0.40%;生根培养:WPM+糖15g/L+IBA1.50mg/L+NAA1.50 mg/L+AC0.20%.     

防止软籽石榴外植体褐变的研究

为降低软籽石榴组培过程中外植体褐化程度,从外植体表面消毒时间、转瓶间隔时间、培养基的硬度、吸附剂的使用方面进行了综合试验。结果表明:表面消毒最适时间为7～9min,10d转瓶1次降低褐化的效果较好;使用硬度为5g/L琼脂的MS培养基,并添加0.1 mg/LNAA+0.1mg/LIBA+1.0mg/L6-BA+30g/L蔗糖+聚乙烯吡咯烷酮(PVP)2g/L可有效控制褐变并获得较高的愈伤诱导率。     

Effects of dexamethasone and Salvia miltiorrhiza on multiple organs in rats with severe acute pancreatitis

Objective: To investigate the protective effects and mechanisms of action of dexamethasone and Salvia miltiorrhiza on multiple organs in rats with severe acute pancreatitis (SAP). Methods: The rats were divided into sham-operated, model control, dexamethasone treated, and Salvia miltiorrhiza treated groups. At 3, 6, and 12 h after operation, the mortality rate of different groups, pathological changes, Bcl-2-associated X protein (Bax) and nuclear factor-κB (NF-κB) protein expression levels in multiple organs (the pancreas, liver, kidneys, and lungs), toll-like receptor 4 (TLR-4) protein levels (only in the liver), intercellular adhesion molecule 1 (ICAM-1) protein levels (only in the lung), and terminal deoxynucleotidy transferase mediated deoxyuridine triphosphate (dUTP) nick end labeling (TUNEL) staining expression levels, as well as the serum contents of amylase, glutamate-pyruvate transaminase (GPT), glutamic-oxaloacetic transaminase (GOT), blood urea nitrogen (BUN), and creatinine (CREA) were observed. Results: The mortality rate of the dexamethasone treated group was significantly lower than that of the model control group (P<0.05). The pathological changes in multiple organs in the two treated groups were relieved to different degrees (P<0.05 and P<0.01, respectively), the expression levels of Bax and NF-κB proteins, and apoptotic indexes of multiple organs were reduced (P<0.05 and P<0.01, respectively). The contents of amylase, GPT, GOT, BUN, and CREA in the two treated groups were significantly lower than those in model control groups (P<0.05 and P<0.01, respectively). The expression level of ICAM-1 protein in the lungs (at 3 and 12 h) in the dexamethasone treated group was significantly lower than that in the Salvia miltiorrhiza treated group (P<0.05). The serum contents of CREA (at 12 h) and BUN (at 6 h) of the Salvia miltiorrhiza treated group were significantly lower than those in the dexamethasone treated group (P<0.05). Conclusions: Both dexamethasone and Salvia miltiorrhiza can reduce the inflammatory reaction, regulate apoptosis, and thus protect multiple organs of rats with SAP.     

植物组织培养实验教学改革与实践

通过完善实验教学大纲,增加基本技能培养内容;改革实验课程体系,优化实验内容;改验证性实验为设计性实验;紧密结合科学研究,培养学生创新能力,以及优化实验考核体系等途径和方法,对植物组织培养实验教学进行改革,取得了良好的教学效果,全面培养了学生的实践能力。     

Correlation of matrix metalloproteinase-2, -9, tissue inhibitor-1 of matrix metalloproteinase and CD44 variant 6 in head and neck cancer metastasis

INTRODUCTIONHeadandneckcancersquamouscellcarci noma (HNSCC)isthefifthmostfrequentmalig nantneoplasmworld wide ;andischaracterizedbylocalinvasion ,disseminationtolocallymphnodeandfrequentrecurrenceattheprimarysiteoftumour.Despiteimprovementsindiagnosisandt…     

樱桃番茄的组织培养与快速繁殖研究

以樱桃番茄新品种“圣女”和“金珠”的叶片、茎段和幼芽为外植体进行试管培养 ,结果表明 :叶片、茎段和幼芽均可诱导形成愈伤组织 ,愈伤组织可分化出芽丛 ,腋芽可直接萌生 ,不定芽可诱导生根成完整植株 .经试验筛选出各培养阶段的最适培养基为 :(1)愈伤组织诱导 :叶片以MS Kt4mgL IAA8mgL为最佳 ;茎段和幼芽以MS NAA0 1mgL 6 -BA1 5mgL为最佳 ;(2 )愈伤组织芽的分化 :MS IAA0 2mgL 6 -BA2mgL ;(3)腋芽萌生 :MS 6 -BA2 5mgL IBA0 1mgL ;(4)生根 :无激素的Ms或Mso .     

生物组织热传导方程的解

本文主要介绍用格林函数求解生物组织在激光照射下，在一定的边界条件下的温度分布。     

Science Letters: Application of new tissue microarrayer-ZM-1 without recipient paraffin block

The ZM-1 tissue microarrayer designed by our groups is manufactured in stainless steel and brass and contains many features that make TMA (tissue microarray) paraffin blocks construction faster and more convenient. By means of ZM-1 tissue microarrayer, biopsy needles are used to punch the donor tissue specimens respectively. All the needles with the punched specimen cylinders are arrayed into the array-board, with an array of small holes dug to fit the needles. All the specimen cylinders arraying and the TMA paraffin block shaping are finished in only one step so that the specimen cylinders and the paraffin of the TMA block can very easily be incorporated and the recipient paraffin blocks need not be made in advance, and the paraffin used is the same as that for conventional pathology purpose. ZM-1 tissue microarrayer is easy to be manufactured, does not need any precision location system, and so is much cheaper than the currently used instrument. Our method's relatively cheap and simple ZM- 1 tissue microarrayer technique of constructing TMA paraffin block may facilitate popularization of the TMA technology.