A Simple Method for Making a Vibrating Probe System

A simple and easy method for making the vibrating probe systemfirst developed by Jaffe and Nuccitelli [(1974) J. Cell Biol.63: 614] is described. The best performance of the probe insea water was 30.7 µA cm^-2 per one µV output, 0.4µA cm^-2 peak-to-peak output-noise and negligible output-driftat 30-µm vibrating amplitude and 3-s amplifier time constant.Sample applications were made for both freshwater and marinealgae. (Received March 22, 1984; Accepted May 28, 1984)     

一种简便制作小型鱼类形态标本的方法

本文介绍一种简便制作小型鱼类形态标本的方法.包括以下步骤:1.制作前准备;2.剥离皮肤;3.支撑架制作与放置;4.缝合;5.配制填充材料;6.填充;7.装义眼与整理姿态;8.干燥,上色,生境制作与固定.与其他制作小型鱼类形态标本的方法相比,新方法中先缝合再填充的步骤,难度小,容易控制填充物的量,做出的标本形态更逼真.     

A Simple Method for Handling Grids

A simple method for handling electron microscope grids is described here. While assuring their identification and safety, this method provides improved handling, temporary storage, and identification of grids bearing ultra-thin sections, and in addition, provides a novel method for preparing bulk samples. Grids are attached at their edges to the weakly adhesive surface of a “Post-it” note pad which sits in a petri dish. The grids are safely immobilized on the pad, classified based on their location, and identified by convenient pad notation. Grid manipulation and identification are simplified using this device, which is easily assembled from readily available and inexpensive materials.     

A Simple Method to Determine Hematoxylin Ripening

A simple spectroscopic method is proposed to control the “ripening” of Delafleld's hematoxylin solution during natural “ripening” or fast oxidation by different agents. The hematoxylin solution has ripened sufficiently for use with tissue sections staining if the absorption is 1.2-1.3 at 560 nm. The hematoxylin solution must first be diluted 15-fold using a 5% ammonium alum solution and the absorption must be measured in 0.5 cm cuvettes.     

一种获得转基因芥菜的简便方法

随着转基因技术的不断革新,更简便高效的转基因方法逐渐发展起来.通过对花序浸染法的探索和改进,采取用移液枪点滴重悬液的方式转化芥菜(雪里蕻,Brassica juncea var.crispifolia)花蕾,最终获得了转基因芥菜.同时通过对影响转化效率的蔗糖浓度、表面活性剂浓度、菌液OD600值等进行研究,发现用5%的蔗糖(W/V)+0.03%的Silwet-77(V/V)重悬农杆菌,使重悬液的菌液浓度OD600为0.8时,可以获得较高的转化效率,转化率为2.3%.该方法避免了真空操作及浸染时间的影响,使得操作更加简便,且转化周期更短,为芥菜的遗传转化提供了一种更为简便的转化方法.     

基于多重PCR的DNA Marker制备方法

报道了一种简便的制备分子量大小为100-1000bp DNA marker的方法,其原理是以一段特异的DNA片段为模板,设计PCR引物,采用多重PCR的方法一次扩增100-1000bp系列条带,酚/氯仿抽提,乙醇沉淀,即可得到条带清晰的DNA marker。     

一种构建重组杆状病毒的简易方法

对传统构建重组杆状病毒的方法作了如下改进：先用磷酸钙共沉淀法单独将质粒DNA转进昆虫Sf细胞中,其中重组质粒采用聚乙二醇沉淀法纯化,12～24h后再用低剂量的病毒攻击细胞．改进后的方法简便、省时、经济、重组率高,适于一般实验室使用．     

A Method for Making Aceto-Carmin Smears Permanent

Anthers are collected and placed in a solution of 1 part acetic acid to 3 parts of absolute alcohol. The contents of the anther are squeezed out on a slide in a drop of Belling's iron-aceto-carmin solution and a cover glass placed over the drop. Care should be taken to remove all anther walls and flower parts. Heat the slide over an alcohol flame for a second, repeating 4 or 5 times. Place the slide in a petri dish filled with a 10% solution of acetic acid. When the cover glass has risen away from the slide gently remove the cover glass and place in a Coplin jar containing equal parts of alcohol and acetic acid. Likewise, place the slide in this solution. Run both cover and slide thru the following solutions: 1 part acetic acid to 3 parts absolute alcohol, 1 part acetic acid to 9 parts absolute alcohol, absolute alcohol and finally equal parts of absolute alcohol and xylol. Recombine the cover and slide in xylol-balsam directly from this solution.     

简便快速分离天花粉毒蛋白的一种方法

 简便快速分离天花粉毒蛋白的一种方法孙建忠,季瑞华,王克夷（中国科学院上海生物化学研究所,上海２０００３１）天花粉是由多年生草质藤本植物栝楼（ＴｒｉｃｈｏｓａｎｔｈｅｓｋｉｒｉｌｏｗｉｉＭａｘｉｍ,Ｃｕｃｕｒｂｉｔａｃｅａｅ）的块茎制成,天花粉毒蛋白是...     

A Method for Making Aceto-Carmin Smears Permanent

Anthers are collected and placed in a solution of 1 part acetic acid to 3 parts of absolute alcohol. The contents of the anther are squeezed out on a slide in a drop of Belling's iron-aceto-carmin solution and a cover glass placed over the drop. Care should be taken to remove all anther walls and flower parts. Heat the slide over an alcohol flame for a second, repeating 4 or 5 times. Place the slide in a petri dish filled with a 10% solution of acetic acid. When the cover glass has risen away from the slide gently remove the cover glass and place in a Coplin jar containing equal parts of alcohol and acetic acid. Likewise, place the slide in this solution. Run both cover and slide thru the following solutions: 1 part acetic acid to 3 parts absolute alcohol, 1 part acetic acid to 9 parts absolute alcohol, absolute alcohol and finally equal parts of absolute alcohol and xylol. Recombine the cover and slide in xylol-balsam directly from this solution.     

一种简单、快速提取DNA的方法

随着分子生物学研究的迅速发展,提取ＤＮＡ已成为一项常规实验。用经典方法提取ＤＮＡ［１］,先用蛋白酶Ｋ、ＳＤＳ消化,然后用酚、氯仿抽提,乙醇沉淀,耗时较多,提取液需要多次转移,易引起交叉污染和ＤＮＡ丢失。本文利用硅藻（ｄｉａｔｏｍ）能够特异性吸附核酸的...     

Pyrosequencing: A Simple Method for Accurate Genotyping

Pharmacogenetic research benefits first-hand from the abundance of information provided by the completion of the Human Genome Project. With such a tremendous amount of data available comes an explosion of genotyping methods. Pyrosequencing(R) is one of the most thorough yet simple methods to date used to analyze polymorphisms. It also has the ability to identify tri-allelic, indels, short-repeat polymorphisms, along with determining allele percentages for methylation or pooled sample assessment. In addition, there is a standardized control sequence that provides internal quality control. This method has led to rapid and efficient single-nucleotide polymorphism evaluation including many clinically relevant polymorphisms. The technique and methodology of Pyrosequencing is explained. Download video file.^{(99M, mov)}     

A Simple Method for Stabilizing and Granulating Fungi

A simple method, 'Stabileze', is described for granulating fungi with water-absorbent starch, sucrose, corn oil and silica. The potential biological control fungi, Colletotrichum gloeosporioides and Fusarium oxysporum , were stabilized using this protocol. Bioassays were performed on C. gloeosporioides and showed retention of pathogenicity. Sucrose and oil were tested for their effects on the viability of F. oxysporum over time, and sucrose appears to be the most beneficial factor.