1) Clone selection
无性系选择
1.
The four main traits of growth(H,D,V) and wood density in 11-year-old Chinese fir clone plantation in Shaowu City in Fujian Province were determined and analysed and the index selection was adopted in good clone selection.
对营造在福建省邵武市11 a生杉木无性系试验林的树高、胸径、材积和木材基本密度这4个主要生长和材质性状进行测定和分析,并采用指数选择法进行优良无性系选择。
3) Reselection for an asexual clones
无性系再选择
4) unselectiveness
无选择性
1.
This thesis is devoted to seek the syntactic account for the unselectiveness of subject and object in Mandarin Chinese.
本文用生成语法句法理论对汉语的主、宾语无选择性现象作出解释。
5) selectivity
[英][silek'tiviti] [美][sə,lɛk'tɪvətɪ]
选择性系数
1.
A mass transfer equation and equations for evaluating mass transfer coefficients and selectivity have been derived by taking into account the dissociation of ammonia in water.
针对气扫式膜蒸馏脱除水中氨的过程,以传质基本理论为依据,导出了考虑水中氨解离的总传质系数表达式,并建立了利用实验结果计算总传质系数和选择性系数的方程。
2.
The effect of H2SO4 concentration and reaction time on the xylose yield and the selectivity of hemicellulose hydrolysis in corn stover under 121 ℃ was studied by response surface methodology.
通过响应曲面法,研究了反应温度为121℃时,不同硫酸浓度和反应时间对玉米秸秆中半纤维素水解为木糖的产率以及选择性系数的影响。
6) selectivity coefficient
选择性系数
1.
The ion selectivity coefficient was detected and the effect of different pH value was investigated.
实验测定了F-的选择性系数,并选择了测定F-的适宜pH范围。
2.
This paper adopts with experiment report form to mix the solution selectivity coefficient of equipotential law mensuration fluorine electrode, determine to survey F~-suitable pH scope, survey the content of fluorine in running water respectively with the standard and method of calibrating curve by addition of law.
采用混合溶液等电位法测定氟电极的选择性系数,确定了测定F-的适宜pH范围,用校正曲线法和标准加入法分别测定了自来水中氟的含量。
3.
In this paper, the theory and methods of detetermination and the design of testing system for ion exchange selectivity coefficient are described.
本文叙述了离子交换选择性系数的测定原理、测定方法以及试验体系的设计;实测了强酸阳树脂RH-Na、RNa-Ca和RH-Ca交换体系的选择性系数,并对不同条件时选择性系数的规律性作了初步探讨,得出了不同条件时选择性系数的一般规律。
补充资料：茶树无性系品种
茶树无性系品种
clonal variety of tea plant
茶树无性系品种(elonal variety of teaplant)采用无性繁殖方法育成的茶树品种，称为茶树无沮三系品种或无性繁殖系品种。这种茶树选种方法在中国约于17一18世纪就已开始应用。无性系品种是从同一个茶树母体中取其一部分营养体(茎、叶、根等)进行扦插、压条繁殖新个体，不通过两性细胞结合后染色体的重新组合过程，故能保持繁殖个体的性状特性相对一致性和稳定性。通常无性系品种茶树的生长整齐，发芽一致，采茶省工，也可提高茶叶品质。其缺点是存在遗传基因的狭窄性.必须多品种搭配种植或以种子繁殖的方式加以克服。 茶树无性系品种按照使用的性质又分为单无性系、双无性系和多元无性系。单无性系是以一个独立的无性系为单位，进行无性繁殖方式繁殖茶苗在生产上应用，但有个别单无性系也可用产生的种子供生产上应用。若以两个不同特点的无性系，按照一定比例同时种植在一个茶园中产生的杂交种子叫做双无性系。多元无性系是指三个或三个以上不同特点的茶树无性系种植在同一采种园中产生的杂交种子。无性系的种子繁殖后代，品种纯度有所降低，故在生产中应对苗木择优使用。(陈炳环)
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