1) directed screening
定向筛选
1.
The strain improvement ,directed screening and fermentation experiments in a little fermentor were studied , An anaerobic fermentation technology was obtained,which made the fermentation unit heightened significantly.
本文报道了利用菌种自然选育、定向筛选和小罐发酵等试验研究方法,总结出了利用费氏丙酸菌进行厌氧培养生物合成维生素B12的发酵工艺,使发酵单位有了很大提高,这对利用厌氧菌生产维生素B12具有一定的指导意义。
2) Directional selection
定向筛选
1.
JIAYIN Poplar embryonic calli were treated with γ-radiation to induce the salt-tolerant mutants through tissue culture and directional selection.
本研究以"加引"组培苗茎段培养获得的胚性愈伤组织为辐射诱变材料,研究了用γ射线(60Co)辐射诱变并在含盐培养基上定向筛选耐盐变异体的方法。
2.
vasinfectum only in few years by directional selection in disease plot,dipping cotton seedling roots cultured in liquid with spore suspension inoculation method was used to study the pathologic changes and differentially expressed cDNAs between susceptible cotton varieties (Xinluzao 7 and Tianjiu 63) and their resistant descendants obtained by directional selection.
本文以这两个棉花品种和其经过病圃定向筛选3年、2年对枯萎病抗性有明显提高的材料为研究对象,运用液体培养棉苗孢子悬浮液浸根接种的方法,针对接种后抗、感材料的病理学变化和差异表达的基因进行了研究,旨在从病理学和分子生物学角度揭示感病棉花品种经过病圃加压定向筛选后抗性发生转化的机理。
3) directional screen
定向筛选
1.
The study of γ irradiation induced mutation(60 Co) and directional screen of resistant variants in medium were made with embryogenic callus obtained from stem culture of "Jiayin" tissue culture seedlings of Populus×euramericana as irradiation induced mutation material.
以欧美杨"加引"组培苗茎段培养获得的胚性愈伤组织为辐射诱变材料,进行了γ射线(60Co)辐射诱变、培养基上定向筛选抗病变异体的研究。
4) directional selection in disease plot
病圃定向筛选
1.
vasinfectum by directional selection only in few years,mRNA differential display method was used to study the differently expressed cDNAs between susceptible cotton variety(Tianjiu63) and its resistant descendants obtained by directional selection in disease plot in this study.
以天九63号棉花品种和其经过病圃定向筛选2年、3年分别对枯萎病菌7号生理小种表现高感、耐病和抗病的材料为研究对象,利用差异显示PCR技术对接种枯萎病菌前后的抗、感材料中差异表达的基因进行了初步研究,结果共得到62个差异条带。
5) directed selection
微生物定向筛选
6) inverse screening
反向筛选
1.
That is to inverse screening by a questionary compound based on a related database,and find out the potential targets of this compound in human body.
以配体分子为提问结构对相应数据库进行反向筛选,根据筛选结果可以得到提问分子在人体内可能的作用受体,并以此为依据进行分子结构改造,以加强配体分子的结合专一性。
补充资料：DSH回转移动式筛选机
1、工作原理：本机座平面上有一个主动轴和四个从动轴托起筛箱，转动的曲轴带动筛箱作回转运动。形成多方位的贯力。使物料在筛网面上翻滚，移动。在每层网架与流料板之间装有网孔式托板及弹球，避免网孔堵塞。筛箱内的网架及流料板与平面相对为斜面，引导筛选物料移动方向，使粗、细物料自动流入下层网面或自动排出。
2、机器特点：
1、单机/小时处理量大，20目-40目，每小时可筛分15吨-20吨;
2、筛网使用寿命长;
3、筛分灵活方便，可同时筛分4种目数，也可以一种目数4次同时筛分;
4、密封性能好，噪音低、省工、省时;
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说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条