1) parental generation
亲代
1.
Binary regression analgsis has been made with the samples,thus establishing a mathematical model of hereditany regression between the height of the filial generation and that of the parental generation for the Tujia Nationality in the western Hubei and Hunan provinces.
采取随机抽样的方法 ,调查了湘鄂西土家族 490个样本的身高资料 ,对其遗传关系进行了初步探讨 ,应用样本作了二元回归分析 ,并建立了湘、鄂西土家族男、女子代身高与亲代身高遗传回归的数学模型。
2) nucleophilic reaction
亲核取代
1.
Polyether ether ketones are prepared by the nucleophilic reaction of hydroquinone with 4,4'-difluorodibenzophenone using diphenylsulfone as solvent in the presence of anhydrous K_2CO_3/Na_2CO_3;the effect of the reaction temperature on molecular weights is discussed.
采用付氏烷基化法,以氟苯、四氯化碳为原料,无水三氯化铝为催化剂,合成单体4,4’-二氟二苯甲酮;再以二苯砜为溶剂,在无水碳酸钾/碳酸钠的催化下,通过对苯二酚与4,4’-二氟二苯甲酮进行亲核取代反应,合成了聚醚醚酮(PEEK),并探讨了反应温度对相对分子质量的影响。
2.
Polyether ether ketones were prepared by the nucleophilic reaction of hydroquinone with 4,4'-difluorobenzophenone using diphenylsulfone solvents in the presence of anhydrous K_2CO_3/Na_2CO_3,of which inherent viscosity was 0.
以二苯砜为溶剂,在无水碳酸钾/碳酸钠的催化下,通过对苯二酚与4,4'-二氟二苯甲酮进行亲核取代反应,合成了特性黏度为0。
3.
Polyether ether ketone ketone was prepared by the nucleophilic reaction of hydroquinone with 1,4-bis (4-fluorbenzoyl)-benz.
以二苯砜为溶剂,在无水碳酸钾/碳酸钠的催化下,以P,P-BFB为单体与对苯二酚进行亲核取代反应合成了特性粘度为0。
3) nucleophilic substitution
亲核取代
1.
Significantly enhanced reactivities of the nucleophilic substitution reactions induced by microwaves in ionic liquids;
离子液体作为微波吸收剂用于促进亲核取代反应
2.
Solvent's Influence on Nucleophilic Substitution Reaction's Rate;
溶剂对亲核取代反应速率的影响
3.
The nucleophilic substitution reaction of 2-aryloxyl-4-chloro pyrimidy with sodium allylalconol;
烯丙醇钠对2-芳氧基-4-氯嘧啶的亲核取代反应
4) electrophilic substitution
亲电取代
1.
Then 3-bromo-2,6-dimethoxy-4-diphenylphosphinopridine was synthesized using 2,6-dimethoxypydine as a raw material through bromation, ortho-lithiation and electrophilic substitution.
在卤化吡啶的锂化反应的区域选择性研究基础上 ,以 2 ,6 二甲氧基吡啶为原料 ,经溴化反应、邻位锂化反应和亲电取代反应制备了 2 ,6 二甲氧基 3 溴 4 二苯基膦基吡啶 ,最终收率可达 5 7。
2.
Condensed Fukui function(CFF)was used to predict the reactive sites in electrophilic substitution ofpenta-heterocycles(pyrrole and furan),hexa-heterocycle(pyridine)and a series of mono-substituted heterocycles(ortho-,meta-and para-).
采用收敛的Fukui 函数对传统杂环和其单取代产物在亲电取代反应中的活性部位做了预测。
3.
Ten sulfo-group containing compound were tested whether they could be used as the phase transfer catalyst (PT CS) for the electrophilic substitution in the solution of H2O/CH3COONa-CH3COOH/ClCH2Cl by measuring the coupling reaction rate constant.
对比无催化剂存在时的动力学数据，证明这类化合物是有效的亲电取代反应的相转移催化剂。
6) parental care
亲代抚育
1.
A review of parental care in fishes;
鱼类亲代抚育行为的研究进展
补充资料：亲代
亲代
符号P1的指遗传学中参加杂交的父本和母本，即子一代的双亲。从子一代向上追述，符号P2，和P3分别代表祖代和曾祖一代。
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