查询词典 o.d.

Based on the effects of atomic radius on the Curie temperature, new bismuth layer-structured piezoelectric ceramics Ca〓〓Bi〓Ti〓O〓 with high Curie temperatures and piezoelectric activities were obtained by A-site substitution for Ca.

本论文从取代原子半径对居里温度的影响入手，利用碱金属原子Li，Na，K和Ce原子复合取代层数m=4的铋层状铁电体CaBi〓Ti〓O〓中位于A位的Ca原子，在保持材料高居里温度的前提下获得了压电系数d〓明显改善的铋层状结构压电陶瓷。

In order to explore the mechanism of polymerization between lignin from effluent of pulping process and lignin precursors, the method and mechanism of co-polymerization of coniferin with model compound of β-O-4 type lignin were investigated.

为了探讨造纸废水中残余木质素与木质素前驱物之间的聚合反应机理，研究了β-O-4型木质素模型化合物与木质素前驱物松柏醇－β-D-葡萄糖苷－[α-13C]的聚合反应方法及其反应机理。

Hardware design includes equipment selection ,I/O address assigning ,exterior input circuit designing ,exterior output circuit designing , the joint circuit of sensor etc .

硬件设计主要包括装置选型、I／O地址的分配、外部输入电路设计、外部输出电路设计、通讯模块设计以及A／D模块和传感器的连接电路等。

D to set up the pressure on the bridge at 4 kg / cm2 (o.4 MPa) over the gas pipelines, more than 10 kilovolt high-voltage power lines and other inflammable and explosive pipe

在桥梁上架设压力在4公斤／平方厘米(o.4兆帕)以上的煤气管道、10千伏以上的高压电力线和其他易燃易爆管线的

I had shot two period films before: The Marquise of O (1975) in real locations and Perceval le Gallois (1978) entirely in the studio.

其中《侯爵夫人》(La marquise d'O， 1975)实景拍摄，而《威尔士人 Perceval 》(Perceval le Gallois， 1978)则完全在摄影棚里完成。

It showed the primary decomposition reaction took place with the breaking of glycosidic linkage, the cleavage of O-glycosidic bond as expected.

同时，香叶基-β-D-吡喃葡萄糖苷热裂解产生了特征香味成分香叶醇，其裂解的基本反应是O-糖苷键的断裂。

Chondrogenesis was assessed with Alcian blue staining, Safranin O/Fast Green staining and collagen Ⅱ immunohistochemistry at 4, 7, and 14 days after initial chondrogenic induction.

在诱导后4，7，14 d应用阿尔新兰染色、蕃红O/固绿染色和Ⅱ型胶原免疫细胞化学评价软骨形成情况。

C ', J5 D; y$ O; V1 D- c8 J A touring group of retired government employees learns about the brash new sights of Dalian, a city on the rise in China's Northeast.

'9 U* J1 _， J1 j9 D% K 一个退休干部旅行团正在听导游介绍中国东北窜升中的城市——大连急速发展的新市景。

B. Each kind of nucleic acid is composed of three parts: Molecular azotic basic group + member pentose + molecular phosphoric acid radical, DNA is by C, H, O, N, the P five kind of elemental compositions. c. The nucleic acid azotic basic group may divide into four kinds: Guanine, thymine, adenine, cytosine d.

b。 每一种核酸由三个部分所组成：一分子含氮碱基+一分子五碳糖+一分子磷酸根，DNA都是由C、H、O、N、P五种元素组成的。

Methods:Dehydration of D-mannitol,followed by a reaction sequence of selective protection,benzylation,deprotection,tritylation,benzylation and removal of the trityl group,afforded the title compound.

以D-甘露醇为原料构建2，5-脱水-3，4，6-O-三苄基-D-葡萄糖醇的手性分子骨架，通过选择性地对多羟基的保护和脱保护达到对产物分离的目的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。