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1)  Unmarkedness
无标记性
2)  Selectable marker-free
无抗性选择标记
1.
The efficiencies of generating selectable marker-free (SMF) transgenic rice through two transformation methods were compared using four indica and japonica varieties as materials.
为研究不同的转化方法培育无抗性选择标记转基因水稻的效果,以4个籼粳稻品种为受体材料,比较了用农杆菌介导的双菌双载体和双T-DNA单载体两种共转化技术的共转化频率及随后获得的无抗性选择标记基因转化子的效率。
3)  unmarked equivalence
无标记性对等
1.
Literal translation and free translation are not two opposing methods of translation,and the translation process is not a process of selection between literal translation and free translation,but that of pursuing an unmarked equivalence.
直译和意译并不是两种对立的翻译方法,翻译的过程也不是在直译和意译之间选择的过程,而是寻求译文和原文的无标记性对等的过程。
4)  label-free
无标记
1.
The label-free DNA sensing techniques are currently receiving considerable attention for the de- termination of pathogenic genes and the diagnosis of genetic disease, etc.
近年来无标记型DNA传感技术的研究已成为病原基因测定和基因疾病诊断等领域新的研究热点之一。
5)  marker-free
无标记
1.
The production of marker-free transgenic plants is a critical advance for both plant biotechnology research and commercial development.
1%,建立了马铃薯无标记转基因技术。
2.
In this study, we established a vector-free and marker-free transformation system, the minimum linear exogenous gene was introduced into maize by pollen-tube pathway method, and it mainly solved the biosatety issue of transgenic plants.
本研究从转基因植物引发安全性问题的根源入手,建立了一种无载体、无标记基因的转化体系,通过花粉管通道法将最小线性片段外源基因导入到玉米中,基本上解决了转基因植物的安全性问题。
3.
Maize immature embryos were co-cultured with Agrobacterium carrying two vectors, one marker-free vector harboring the SCMVirNIb and .
先构建了无标记基因的SCMV-MDB复制酶基因NIb的反向重复序列(SCMVirNIb)表达载体pSCMVirNIb。
6)  bare markers
无标记词
补充资料:放射性碘标记的放射性药物
分子式:
CAS号:

性质: 131I是最早用于临床的放射性核素之一。临床上常用的碘标放射性药物有:(1)Nal31I,用于甲状腺显像和甲亢治疗;(2)心肌显像用131I(123I)-CO-长链脂肪酸;(3)脑功能显像用123I(131I)-IMP(N-异丙基对碘安非他命,N-isopropyl-p-iodoamphetamine),123I(131I)-HIPDM[N,N,N′-trimethyl-N′-(2-hydroxy-3-methyl-5-iodobenzyl)-1,3-propanediamine];(4)受体显像用123I(131I)标记变体配体,如D1,D2,乙酰胆碱,安定类受体显像剂;(5)用于放射免疫显像和治疗的131I标记抗肿病抗体;(6)肾上腺显像剂131I-6-碘胆固醇、131I-间-碘苄胍等。

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