查询词典 tridentate

Complexes 7-12, 16, 22 and 23 are dimeric molybdatesor dimeric tungstates, the central metal with citrate or malate in a molar ratio of 1:1. Theanions of these complexes have two metal atoms and two ligands. Each ligand acts as atridentate fashion via theirα-alkoxy,α-carboxy andβ-carboxy groups coordinated to eachmetal atom. Complex 13 is a monomeric molybdate. The citrate ligand coordinates tomolybdenum with itsα-alkoxy,α-carboxy andβ-carboxy groups in a tridentate mode.

其配阴离子中都含有2个金属原子和2个配体，且配体均以α-烷氧基、α-羧基和β-羧基氧与中心金属三齿配位。13是单核柠檬酸钼配合物，柠檬酸也以α-烷氧基、α-羧基和β-羧基氧与钼三齿配位。17和21分别为苹果酸钼、柠檬酸钨单核配合物，其中苹果酸、柠檬酸配体均以α-烷氧基氧和α-羧基氧与金属双齿配位。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。