The paper reviews the basic mechanism of photocatalytic oxidation, the kinds of photocatalyst, the characteristics of TiO2 and the commonly used carriers of TiO 2 photocatalytic oxidation in water treatment, the degradation of organic pollutants in water by photocatalytic oxidation and the applications of this new technique in tap water purification. The photocatalytic oxidation as a new technique of environmental protection is being much con-cerned widely.

Avian influenza virus H6N1 subtype has been circulating in aquatic bird and terrestrial bird,and is the most frequently detected subtype of influenza A virus in those hosts.Genetic analysis results suggested that this virus might be the progenitor of the highly pathogenic avian influenza H5N1 virus,as seven of eight gene segments of those viruses had a common source.As continuing evolution of H6N1,it could spread across species barriers to mammals and had strong infection ability in mice,swine and ferrets.Serological epidemiological survey showed that a few people were positive for H6 avian influenza virus antibody and then the world's first human infection with influenza virus H6N1 subtype was reported in May 2013.Therefore,with the expansion of the host range of the virus,gene mutation and gene reassortment of H6N1 virus can occur in these hosts,and then it may evolve into novel variant strain with infected human potential.

Considering the fact of rapidity and concentration of aging of population, Chinese government has regarded it as an important strategic issue. However, how to get a dignified ending still a big problem for the old age today. This article tries to explore the possibility of advance care planning (ACP) approved under the background of aging of population in China based on general report of Chinese government deal with aging of population and existed facts. Though the researches on this topic have grown rapidly, the government legal system is still close to it in this moment, and in the process of practice constantly, it will be a perfect research. It is certain that the legislation of ACP in China will has a long way to go, but in the view of the advancement of death with dignity, palliative care, we still can predict a bright future of ACP.

Objective To introduce extreme lateral interbody fusion (XLIF) as a new minimally inva-sire spinal surgery with established correction and fusion methods to assess its clinic use for degenerative scoliosis. It is emphasized the value and highlight of this technique in spinal surgery. Methods Surgical treatment of 8 patients with degenerative scoliosis were performed with XLIF between March 2006 and April 2008. In this group of patients, 5 cases provided an anterior cage in every disc space, and another 3 supplemented with vertebrae screw fixation. Blood loss was 50 ml every procedure. To observe the low back pain, corrective rate, achieving a balanced and complications. Results The low back pain have been relieved in all patienta after operations, the disc height can be restored, allowing more room at the foraminal level for nerve roots, and lumber lordosis can be maintained. Corrective rate was 64%, there wasn't neurologic and vascular injury, 2 case had correction loss a little postoperation 6-30 month. Conclusion The potential benefits of XLIF include safe, effective, less approach-related blood loss, improved cosmetic result with smaller incisions, and reduced hospital stay for degenerative scoliosis.

We innovated video assessment integrated teaching method on the basis of clinical case discussion,teaching rounds,problem-based learning,case method and micro teaching.According to this video feedback teaching,students became teaching subject and teacher acted as guide.In order to realize the purposes of early contact with clinical practice,more clinical practice and repeated clinical practice teaching,we implemented student-centered small class teaching,which was heuristic,inquisitive,interactive and was discussion-based.At the same time with the help of medical simulation equipment and video feedback teaching,this method developed students' life-long learning ability and work competence and combined theory with practice,demonstration with imitation as well as standards with innovation.This method was not only suitable for theoretical study but also for skills training,especially for standardization training.

Clinical teaching plan of pneumothorax and hemorrhagic shock was prepared with mind maps. The process of making this teaching plan was demonstrated as follows:relationship among all levels of subjects in this course was manifested by text and graph as belong and relevance. It is sim-ple, smooth, focused, lucid and easy to understand and remember. Application of mind mapis ex-tremely simple;it is suitable for medical education and is conducive to enhancing teaching efficiency.

Daiwenjiu Gao plasters were stuck onto the following two groups of acupoints,group 1 including acupoints Guanyuan (CV 4), Shenshu (BL 23) and Zusanli (ST 36) and group2 including acupoints Zhongji (CV 3), Pangguangshu (BL 28) and Sanyinjiao (SP 6), to treat 100 cases of infantile enuresis, the results showed that 92 cases were cured, 6 cases got remarkable effect, 2 cases got effect, with total effective rate being 100%.

The aim of this study was to evaluate the seed quality of C.deserticola and establish quality grading rules of seeds by detecting the impacts of different processing methods on the contents of the effective components of C.deserticola for optimizing the suitable processing method.The seed quality was judged by thousand-kernel weight,empty embryo rate and water content.The samples were preliminary processed by freeze-drying,natural drying and hot air circulation drying respectively,and the content of phenylethanoid glycosides was determined by HPLC-UV.The seed quality classification standard of C.deserticola was established,and the seeds were divided into three grades based on the standard.It was found that freeze-drying method was optimum,featuring less effective component loss,beautiful appearance of herbal piece,crisp texture and fast drying.In conclusion,this study laid a foundation for the quality control of the seeds of C.deserticola with the provision of scientific evidence for the initial processing of the fresh product.

Objective:To evaluate diagnostic value of contrast-enhanced harmonic endoscopic ultrasonography (CEH-EUS) for pancreatic cystic lesions.Methods:Endoscopic and clinical follow-up data of patients with pancreatic cystic lesions diagnosed by EUS in Department of Gastroenterology of the First Affiliated Hospital of Naval Medical University with CEH-EUS video from March 2013 to April 2020 was retrospectively analyzed.Results:A total of 36 patients were included. There were 16 cases of serous cystadenomas (SCA), 10 cases of mucinous cystic neoplasm (MCN), 5 cases of intraductal papillary mucinous neoplasms (IPMN, 3 with complex type, 2 with main pancreatic duct type) and 5 cases of pancreatic pseudocyst (PPC). 87.5%(14/16) of SCA and 86.7%(13/15) of MCN+ IPMN had hyperenhanced cystic wall with obvious peak and similar washout as surrounding tissue, whereas only 20%(1/5) PPC had hyperenhanced cystic wall. The hyperenhancing effect of PPC was significantly lower than that of SCA and MCN+ IPMN ( P=0.0035 and P=0.0048, respectively ). Mural nodules were detected in 17 cases of pancreatic cystic lesions by EUS, of which 3 cases had hyperenhanced mural modules and 14 cases had hypoenhanced mural nodules by CEH-EUS. Patients showing hyperenhanced mural modules were all finally diagnosed as pancreatic malignancy (1 IPMN, 2 MCN), and the accuracy was 100%. Conclusions:CEH-EUS can have a obvious advantage of differentiating pseudocyst and other pancreatic cystic lesions, while not very useful for differentiating SCA and MCN. Pancreatic cystic lesions showing hyperenhanced mural nodules under CEH-EUS may imply malignancy potential.

Objective To evaluate the value of diagnosis and treatment of fallopian tube patency by using hysterosalpingocontrast sonography (HyCoSy) with SonoVue and transvaginal ultrasound for infertile women. Methods Two hundred and twenty-two infertile women were examined by HyCoSy-SonoVue to observe flowing condition in womb and fallopian tube,the results were compared with hydrotubation, X-ray hysterosalingography(HSG) and laparoscopy(hysteroscopy). Results In the 222 cases,73 cases were both side of fallopian tube patency, 72 cases were single fallopian tube patency, 13 cases were single partial obstruction,60 cases were both side of fallopian tube pinning,4 cases were both partial obstruction. There was a significant difference on pregnancy rates between the HyCoSy-SonoVue and hydrotubation (P 0.05). There was no difference on diagnostic rates of fallopian tube pateney between the HyCoSy-SonoVue and laparoscopy (hysteroscopy)(P>0. 05) ,the diagnostic rate of H yCoSy-SonoVue was higher than that of HSG. Conclusions The HyCoSy-SonoVue method is safety and it would be an effective diagnosis in the evaluation of fallopian tube pathology for infertile women.