查询词典 orbital

The organoboron compounds in this paper are based on triarylboranes, boronic acids and boronic esters. The structure-property relationship and sensing mechanism are elucidated. Organoboron compounds as Lewis acid can be used as fluoride probe with high sensitivity and selectivity because they have a unique LUMO in which the π-conjugation is divergently extended through the vacant p-orbital of the boron atom. The complexation of the boron π-electron systems with fluoride ion would interrupt the π-conjugation extended through the boron atom, causing the change of photophysical properties.

介绍了基于三芳基硼化合物、硼酸和硼酸酯的有机硼化合物在氟离子检测中的应用，评述了这些化合物的结构和检测性能之间的关系，讨论了检测机理，即有机硼化合物中硼原子空的p轨道使其作为路易斯酸能够选择性地结合氟离子，硼原子与氟离子的结合破坏了硼中心与芳香取代基的p-π共轭，引起有机硼化合物光物理性质的变化，从而实现对氟离子的高选择性检测。

Among his other professional activities, Doney serves on the NASA Orbital Carbon Observatory science team and is chair of the Ocean Carbon and Climate Change Scientific Steering Group, which is a part of the U.S.

唐尼从事许多科学研究，他是美国航太总署轨道卫星碳观测站的科学小组成员，也是海洋碳与气候变迁科学指导小组的主席。

By the B3LYP calculation of DFT, the difference in changes of energy and charge of ion probe C〓 and C〓 interacting with hBN and graphite respectively and the difference in frontier orbital energy level reveal difference in electroaffinity of hBN and graphite. It could be indicated that hBN only shows weak electropositivity, and will not be able to accept electrons from metal.

根据密度泛函B3LYP方法的计算结果，从六方氮化硼与石墨的前线轨道能级和两者对离子探针的作用能及C〓和C〓的电荷变化不同所表现出的在电亲和性上的差异，揭示了金属难以插入六方氮化硼层间的原因是六方氮化硼仅显弱的电正性，不能接受金属转移来的电子。

Enophthalmos is a relatively frequent and misdiagnosed clinical sign in orbital diseases.

眼球内陷是一系列常见和误诊疾病的临床体征。

Methods 100 cases with enophthalmos and orbital fracture were operated, and examinated by using the computed tomography, flash electroretinogram and pattern visual evoked potentials before and after operation.

应用螺旋CT影像和视觉电生理检查技术对100例施行眼眶重建和眼球复位手术的患者进行观察研究。

The orbital fracture may lead to many serious consequences including diplopia, enophthalmos and disturbance of ocular movement.

讨论：眼眶骨折可导致一系列并发症，包括眼球内陷、复视和眼球运动障碍，复视和眼球运动障碍与骨折移位和眼外肌嵌顿有关，骨折复位、解除嵌顿多可得到治疗，而眼球内陷的治疗则较为困难。

Objective In order to provide early valuable information in diagnosis, prediction and treatment, the ratio between the expansion of orbital volume behind the axis of the globe and the degree of the enophthalmos was studied,and the time and degree of enophthalmos were observed.

目的：通过测量眼眶爆裂性骨折伴有眼眶扩大患者的后部眼眶容积、观察眼球内陷出现的时间及程度，研究后部眶容积扩大与眼球内陷的关系比值，为病情预测和眶内填充手术提供比较精确的参考数据。

Conclution Enophthalmos usually appeared in the second and third week, and it tended to steady until the third month. The ratio is 1.0 between the expansion of the orbital volume behind the axis of the globe and the degree of enophthalmos. The ratio measurement may predict the occurrence and the final degree of the enophthalmos , may provide precise parameter for implant's volume . It has very important clinical significance.

眼球内陷通常于伤后2周～3周出现，3个月时趋向稳定；后部眶容积增大与眼球内陷产生比值为1.0，呈正相关；后部眶容积扩大与眼球内陷比值可预测发生眼球内陷的可能性和程度，为手术矫正眼球内陷提供可靠、精确的参考，具有十分重要的临床指导意义。

The research cases are the patients with single lateral orbital fracture accepted treatment in the trauma center of Peking university school and hospital of stomatology during 2004.9 to 2007.3. All patients accepted ophthalmological examination including the degree of enophthalmos, the degree of diplopia and eyesight.

材料和方法：2004年9月～2007年3月在北大口腔医学院接受治疗的眼眶骨折患者，所有患者在手术前后常规行CT平扫（层厚0.625mm），并行眼科检查，包括：眼球突度、视力、复视、眼球运动等。

Porous high-density polyethylene ; Orbital blow-out fractures ; Enophthalmos

高密度多孔聚乙烯；眶壁爆裂性骨折；眼球内陷

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。