查询词典 oxalate

It is found that in the presence of butyl titanate or stannous oxalate as a polycondensation catalyst the carboxyl content is not always on the increase in all high vacuum stage.

发现，钛酸四丁酯或草酸亚锡作为缩聚催化剂时，在整个高真空阶段羧基含量并不是一直增加的。

Abdominal X-rays to evaluate for dense stones such as those made of struvite and calcium oxalate.

腹部X光检查可以评估多量的结石，例如磷酸铵镁和草酸钙

Oxalate stones have now become an increasingly common side effect of treatment for struvite crystals.

草酸盐结晶已成为治疗鸟粪石结晶时常发生的一个副作用。

Barium titanate ; electronic ceramic ; barium titanyl oxalate tetrahydrate ; preparation technology.

钛酸钡；电子陶瓷；草酸氧钛钡；合成技术

In order to get the information of interaction between metal complex and DNA and select metal complexes which can cleave DNA effectively, twenty seven transition metal complexes containing O/N coordinate atoms have been synthesized in this thesis. We report the synthesis, crystal structure and properties of the complexes. One of the complexes is the first μ〓-oxalato tetranuclear Cu complex, in which there is ferromagnetic interaction between the copper atoms bridged by oxalate ions. Two trinuclear copper complexes containing partial cubane Cu〓O〓 cores have been synthesized and discussed the magnetic properties.

为了解金属配合物与DNA的相互作用及筛选能有效切割DNA的金属配合物，为无机药物合成及应用提供基础信息，本文利用十个含N、O原子的多齿配体设计合成了二十七个未见文献报道的过渡金属配合物，并解析了它们的晶体结构：其中包括首例μ〓-草酸根的四核铜配合物；合成了两个具有μ〓-OH〓三核缺角立方烷结构的Cu配合物；以HCBP衍生物为配体合成了七个过渡金属配合物；以SCN〓、N〓，C〓O〓等为桥联配体，以dmpyen为端基配体合成了十一个配合物。

The main contributions of this thesis are:(1) Seven mononuclear complexes of tetradentate ligand NTB have been obtained using N〓 or SCN〓 as the additional ligand;(2) Seventeen binuclear complexes of Fe , Zn , Co , Cu have been designed and the complexes of Co , Cu exhibit antiferromagnetic properties;(3) Changing the bridged-ligand such as PO〓, CO〓, o-phth, mai, Ag (CN 〓, Au 〓, etc , fourteen tetranuclear complexes of polypridine ligand have been synthesized;(4) Two antiferromagnetic 1D chain complexes of KH〓pdc ligand have been prepared from hydrothermal reactions; in addition, one ferromagnetic 1D chain copper complex of tpdp which is bridged by oxalate has been obtained.

本论文的主要贡献为：(1)合成了配体NTB的七个新型单核配合物；(2)合成了十七个铁、锌、钴及铜系列混桥双核配合物，其中双核钴和双核铜配合物为反铁磁偶合；(3)选用多吡啶配体tpdp和TPA，改变桥联配体，合成了十个四核配合物；(4)选择配体KH〓pdc，采用水热合成方法得到了反铁磁性一维链状锰、铜配合物；以草酸根为桥联配体，合成了配体tpdp的一维链状铜配合物，该化合物为铁磁偶合，文献较少报道。

The invention relates to a method for manufacturing polyesters, in particular, to using a lithium titanyl oxalate as the catalyst for such reaction to provide fast reactions with excellent color properties for the resulting polyester.

本发明涉及一种制备聚酯的方法，尤其涉及采用钛氧基乙二酸锂作为此类反应的催化剂以加快反应，并使所得聚酯具有优良的色泽性能。

The improved process produces a polyester of improved color versus other titanyl oxalate catalysts and a novel polyester without the presence of antimony.

此改进的方法制备出一种与采用其它钛氧基乙二酸盐催化剂的方法相比具有改进的色泽的聚酯和一种不含锑的新型聚酯。

In this paper, strontium lead titanate was prepared from strontium lead titanyl oxalate tetrohydrate by chemical coprecipitation .

采用化学共沉淀法经前驱体草酸氧钛锶铅制得钛酸锶铅粉末。

The present invention provides an improved method of producing polyester by the polycondensation of polyester forming reactants wherein the improvement comprises utilizing, as the polycondensation catalyst, lithium titanyl oxalate.

本发明提供了一种由制备聚酯用反应物的缩聚反应制备聚酯的改进方法，其中的改进包括使用钛氧基乙二酸锂作为缩聚反应催化剂。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。