The recent research progress of photo-catalyzed degradation of organic pollutants by TiO2 is reviewed,the characteristics of hydrothermal method and the prepared processes of TiO2 were discussed,the photo-catalyzed mechanism under UV and visible light and the application of degradation of sewage using TiO2 nanomaterials from five aspects were described in this paper. The main problems existing in the studies of TiO2,the research directions,and the development prospects were also discussed.

Objective To investigate the role of sex chaperone on self-acceptance,anxiety,depression and coping strategy in stable phase extensive burn patients'.Methods According to the different role of accompanies,the extensive burn patients in stable phase were divided into sex chaperone accompany groups(treatment group)and non-sex chaperone accompany group(control group).They were assessed by self-acceptance questionnaire(SAQ),self-rating anxiety scale(SAS),self-rating depression scale(SDS)and medical coping modes questionnaire(MCMQ).The results were statistically analyzed.Results The treatment group patients'results are as follows:SAQ total score was(41.37±6.98),self-acceptance factor score was(20.56±4.87),self-evaluation factor score was(22.35±5.82),MCMQ facing factor score was(21.80±4.07),MCMQ avoiding factor score was(22.35±5.82).The results of treatment group patients were significantly higher than those in control group,it had significant differences(P<0.05 or P<0.01);while the treatment group patients'scores of SAS,SDS,MCMQ yield factor were significantly lower that those in the contorl group.The self-acceptance factor score appeared to be negative correlation with the SAS score,SDS score and MCMQ yield factor score,while to be positive correlation with MCMQ facing/avoiding factor score.Conclusion Sex chaperone'accompany can eliminate the extensive burn patients'tension and the effect of adverse psychological factors,and meet family love needs of patients,then improve the level of patient self-acceptance,reverse the negative emotion of patients,and guide patients in a positive way to face the disease.

Objective To investigate the efficacy of dexmedetomidine in reduce of hyperalgesia in patien with remifentanil anesthesia.Methods 84 patients scheduled for laparoscopic hysterectomy from December 2014 to April 2016 were selected and randomly divided into two groups: the observation group and the control group,42 cases in each group,two groups were intravenous infusion of remifentanil,propofol and inhaled sevoflurane to maintain anesthesia.In the observation group,0.6μg/kg of dexmedetomidine was given 40minutes before the end of the operation(adding to 100mL 0.9％sodium chloride solution,infusion within 10minutes),the control group was given the same volume of 0.9％sodium chloride solution.The visual analogue scale(VAS)and the bruggrmann comfort scale(BCS)were used to evaluate the postoperative pain and comfort of the two groups of patients at different time points,and compare the incidence of adverse events between the two groups.Results The VAS scores of the two groups were significantly different at 1h(T1),4h(T2)and 24h(T3),and the VAS score of the observation group was significant better than that of the control group,the difference was statistically significant(P<0.05),the BCS scores of two group were compared at T1 and T2,the difference was statistically significant(P<0.05),but there was no significant difference between the two groups at T3.The incidence of adverse reactions in the observation group was lower than that in the control group,the difference was statistically significant(P<0.05).Conclusion Dexmedetomidine can relieve and prevent the incidence of hyperalgesia and adverse reactions in patients with remifentanil anesthesia,and improve the analgesic effect of postoperative patients.

OBJECTIVE:To prepare diclofenac sodium controlled release tablet,and to evaluate the mechanism of drug release.METHODS:Stearic acid and ethyl cellulose were used as blocking agents and sodium carboxylmethyl starch was used as disintegrating agent.Tablets were made after drying the granules prepared.The dissolution rates were acquired according to Chinese Pharmacopoeia(1995).RESULTS:Drug release from the tablets prepared was of zero-order release before 90% of drug released.No significant influences were observed from the dissolution rates of the different pressure of tablet(5～10kg),amount of drugs contained in the tablet(35%～60%)and different geometry of the tablets,respectively.The remarkable difference waw observed between the disintegrating and blocking agents contained in the tablets.CONCLUSION:The time of 50% of durg released could be changed as the amount of disintegrating or blocking agents were changed.

Objective To develop the neonatal hearing screening,investigate the incidence and relevant high-risk factors of congenital hearing loss,and explore feasible methods of early screening,diagnosis,following-up and intervention.Methods DPOAE was used for the newborns.The children who failed the tests or had high-risk factors of hearing loss were re-screened using DPOAE and AABR 42 days.ABR was used as the diagnostic test for those who had abnormal results at 3 months,ABR and ASSR were used at 6 months for the second diagnosis.The children with hearing loss were intervened in time,and were arranged for routine following-up and audiological evaluation.Results The normal neonates who failed the first screening was 14.8%,infants with high-risk factors was 21.5%,the large number of normal infants passed re-screening and half of high-risk neonates failed.By analysis of patients who had three-month diagnosis,the incidence of congenital hearing loss was about 2.75‰,and mild-grade,middle-grade,severe,profound was 0.18‰,1.78‰,0.26‰ and 0.53‰ respectively.Conclusion The incidence of congenital hearing loss is the highest in congenital diseases,usual screening is necessary.Questionnaire for high-risk factors of hearing loss must be done;it is very important to follow-up the abnormal infants.

Objective To construct a temporomandibular joint (TMJ) model including mandible by means of three-dimensional finite element methods and to investigate the stress distribution of the condyle during clenching of edentulous jaw with complete denture.Methods The three-dimensional model (3-DFEM) of TMJ including mandible of edentulous jaw patient was constructed by helix-CT scanned transverse sections.The stress distribution of the condyle was analyzed under load.Results The three-dimensional finite element model of TMJ including mandible of edentulous jaw was established,then loaded and calculated on the corresponding situs of posterior tooth of the model.Analytic results showed the stress on the neck of condyle obviously surpassed that on the top of condyle.The stress decreased from external to interior on anterior and posterior incline,and decreased from anterior to posterior on interior and external incline of the condyle.Compressive stress was dominant in the anterior incline and upper 12 of lateral part (near the top of the condyle),and tensile stress was dominant in the inferior 12 (near the neck),so the lateral inferior part was featured by high stress distribution.In the posterior and interior part,tensile stress occupied the upper 12 and compressive stress was main in inferior 12.Conclusion The edentulous jaw of patients had the compressive stress and tensile stress simultaneously on the whole condyle.But the stress is different in level and feature of distribution.The external anterior incline is featured by the highest stress distribution,and it is consistent with the feature of the TMJ of healthy people.

[Objective]To observe changes of skin reinnervation during burn wound healing and determine remodeling of nerve fibers.[Method]Wound tissue and scars were harvested.Collagen was determined with modified Masson trichrome staining and nerve fibers were labeled with neuro filament protein by immunofluorescent technique.Three dimension reconstruction of nerve fibers regenerated was observed under laser scanning confocal microscope.[Result]The CVF(collagen volume fraction) increased during the process of wound healing.The regenerated nerve fibers were sparse,short and small,which was significant lower the normal control.The skin reinnervation improved during the wound healing process and came to peak NVF(nerve fiber volume fraction) in proliferative stage.Disintegration and fragmentation were observed frequently in samples from proliferative stage,which seldom occurred during mature stage.[Conclusion]The remodeling of skin nerve fibers comprises a sequential process of increasing number,shape distortion during wound healing and then disintegration,number decrease and normal shape.

Objective To assess the adequacy of decompression immediately in anterior cervical surgical procedures with epidurography, and to prevent from leaving compressive materials. Methods After completing primary decompression of anterior cervical intervertebral space by discectomy or corpectomy, posterior longitudinal ligaments were incised or resected, 5-10 ml Omnipaque 300 contrast medium was injected into upper and lower segments of decompressed area through a soft 18# injection needle. Distribution of the contrast medium in front of dura mater was observed by fluoroscopy so as to identify whether the spinal cords were decompressed completely. 64 patients suffered from cervical spondylotic myelopathy, and spinal cords were compressed respectively by giant intervertebral disc prolapse, osteophyte or short segmental OPLL. Intraoperative epidurography was performed after primary anterior decompression. If contrast medium in front of dura mater was discontinued by fluoroscopy, incomplete decompression was judged. 39 of 64 patients were followed up after operation, and in 18 patients of them MRI were taken within 1-12 weeks after operation. Neurological function was compared between preoperation, immediate postoperation and final follow-up by means of JOA scores. Results After completing primary decompression, epidurographs showed that the contrast medium were continuous in front of dura mater in 49 cases(77%), 11 patients of them were examined by MRI during follow-up and the images indicated that cervical cords were free of compression. In 15 cases (23%), the contrast medium was not continuous in front of dura mater, then decompression was performed further until the contrast medium no any interruption. 7 patients of them were confirmed by MRI that cervical cords were no more compressed. 39 patients were followed up postoperatively with a mean follow-up of 13 months. Neurological function was recovered immediately after operation by 52% and 61% at final follow-up. No neurological deficit progressed in all of them. Conclusion Intraoperative epidurography is effective and safe for assessment of decompression during anterior cervical surgical procedures.

Objective To explore the pathogenic effect of serum platelet derived growth factor(PDGF) in Henoch - Schonlein pur-pura nephritis(HSPN) and the influence of heparin. Methods The levels of serum PDGF were detected before and after heparin therapy by double antibody ELISA in the peripheral blood of patients. All patients were injected with heparin calcium[100 U/(kg?d)] for two to three weeks. Results The levels of serum PDGF(596.23 ? 199.43) ng/L in 30 HSPN cases before heparin therapy were significantly higher than those of the control group(259.76?69.58) ng/L (P

Objective To explore the effect of dexmedetomidine combined with sufentanil on postoperative analgesia , early postoperative cognitive function and serum inflammatory factors in patients with laparoscopic gastrectomy of gastric cancer.Methods 80 cases of laparoscopic resection of gastric cancer were randomly assigned to treatment group and control group.The control group were treated by sufentanil 1.6μg/kg.The treatment group were given sufentanil 1.6μg/kg combined with dexmedetomidine 2 μg/kg.The analgesic effect, early cognitive function and serum levels of inflammatory factors were tested and compared after surgery.Results Compared with the control group, the VAS score in 4 h,8 h,24 h and 48 h after surgery were lower in the treatment group (P<0.05), the POCD(P<0.05), the IL-6,IL-10 and TNF-αlevel were lower in the treatment group(P<0.05). Conclusion Dexmedetomidine combined with sufentanil showes better postoperative analgesic effect and fast recovery of cognitive function, regulate the levels of serum inflammatory cytokines after laparoscopic resection of gastric cancer .