The clinical study of modified total aortic arch replacement and stent elephant trunk technique treatment for patients with DeBakey Ⅰ thoracic aortic dissection

Objective To summarize the clinical study of modified total aortic arch replacement and stent elephant trunk technique treatment to patients with DeBakey Ⅰ thoracic aortic dissection. Methods From January 2006 to October 2010,101 cases of DeBakeyⅠaortic dissection were treated by modified total arch replacement and stent elephant trunk technique,in which emergencey surgery were performed on 73 cases. There were 76 male and 25

Advances Treatment Technologies in Chemical Industry Wastewater

The main treatment methods of chemical wastewater were reviewed.Physical,chemical,and biochemical treatment technologies effective for removing those pollutants were presented with their applicability,effectiveness and advantages.The problems facing the wastewater treatment in the petroleum chemical industry and coal chemical industry were introduced.In the end,the new progress and trend of the processes were overviewed.

Full-thickness scleral incisions technique for the treatment of a cyclodialysis cleft following ab interno trabeculotomy

Dear Editor, I am Dr.Daniela Alvarez-AscenciofromtheGlaucoma Department at Asociacion Para Evitar la Ceguera (APEC)in Mexico City, Mexico. I write to present a successful case of cyclodyalisis repair in a direct visualization technique that was performed on a patient after a microincisional glaucoma surgery (MIGS) complication.

Assisted coiling techniques in treatment of intracranial complex aneurysms

Objective To investigate the application of assisted coiling techniques in the treatment of complex intracranial aneurysms. Methods From Jun. 2007 to Aug. 2010,36 patients with 41 complex intracranial aneurysms were treated by varient endovascular methods,including balloon, stent-assisted coiling and double microcatheter coilingtechniques. Results Among the

Techniques for Treating Sulphuric Acid Pickling Waste Liquid of Steel Industry

Pickling waste liquid of the steel industry is included in National Hazardous Wastes Catalogue because of its high corrosion and large discharge. The techniques for treating pickling waste liquid （ H2SO4 ） in steel industry is summarized. The advantages, disadvantages and applied ranges of all kinds of control technologies are comparatively analysed. The research trends of techniques for treating pickling waste liquid （ H2SO4 ） are the resource reclamation technologies in future which is pointed out in the paper.

The effect of oxidation on physicochemical properties and aqueous stabilization of multiwalled carbon nanotubes：comparison of multiple analysis methods

Surface oxidation can alter physicochemical properties of multiwalled carbon nanotubes(MWCNTs) and influence their aqueous stabilization.Many techniques have been used to characterize the physicochemical properties and aqueous stabilization of MWCNTs.However,the relationship between the change in physicochemical property and the aqueous stabilization of MWCNTs merits more studies,and the multiple characterization techniques have not been well compared.This study systematically and comparatively investigated the effect of oxidation on the physicochemical properties and aqueous stabilization of MWCNTs using multiple analysis methods.Increased surface area,disclosed tube ends,defects on the sidewalls,disruption of the electronic structure,and removal of metal catalysts and amorphous carbon were observed for the oxidized MWCNTs(o-MWCNTs) using the multipoint Brunauer-Emmett-Teller(BET) method,transmission electron microscope observation,Raman spectroscopy,UV-Vis spectroscopy,and thermogravimetric analysis.An oxidation-time-dependent increase in oxygen content of the MWCNTs was verified by the methods of elemental analysis,mass difference calculation,and X-ray photoelectron spectroscopy(XPS).Fourier transform infrared spectroscopy,XPS,and the Boehm titration were employed to study the functionalities on the MWCNT surfaces.Despite the limitations of these techniques,the results indicated that the dramatic increase in carboxyl groups was mainly responsible for the significant increase in oxygen content after the oxidation.The dissociation of the grafted functional groups increased electronegativity of the o-MWCNTs and facilitated the aqueous stabilization of o-MWCNTs through electrostatic repulsions.The oxidation affected the UV-Vis absorbance of MWCNT suspensions.The absorbances at 800 nm of the stabilized MWCNT suspensions had a good correlation with the MWCNT concentrations and could be used to quantify the MWCNT suspensions.The findings of this work are expected to boost the research on carbon nanotubes and their environmental behaviors.