Objective:To explore the relation of mobile phone addiction to perceived social support and sub-jective well-being in college students. Methods:Totally 4000 college students were selected from 2 colleges,and they were assessed with the Mobile Phone Addiction Inventory (MPAI),Perceived Social Support Scale (PSSS) and subjective well-being scale (SWB). Results:The college students of mobile phone addiction were 1420 cases, accounting for 37. 9%. Except the dimension of negative emotion,the PSSS total scores and its factor scores,the SWB total scores and its factor scores were lower in the Mobile Phone Addiction (MPA)group than in the non-MPA group (Ps<0. 00 1 ). Regression analysis indicated significant negatively predictability of MPAI to subjective well-being and PSSS had significant positively predictability to SWB. The test of mediating effect found that PSSS and its 3 dimensions played a partly mediating role between MPAI and SWB,and the mediation effect account for the total effect 24. 89%,16. 1 1%,17. 33%,17. 78% respectively. Conclusion:There may be a close relation of mobile phone addiction to perceived social support and subjective well-being. Mobile phone addiction could directly affect subjective well-being and indirectly affect subjective well-being through perceived social support.

Objective:To detect the distribution of the receptor for advanced glycation end products(RAGE) in gingival tissues of patients with non-insulin dependent diabetes mellitus(NIDDM) accompanying periodontitis.Methods:5 patients with chronic periodontitits(CP) and 4 patients with NIDDM accompanying periodontitis were included. Immunohistochemical staining was performed to detect RAGE and tumor necrosis factor ?(TNF-?) expression in gingival tissues.Interleukin 6(IL-6) and TNF-? levels in gingival crevicular fluid and serum of these patients were examined by ELISA.Results:More RAGE cells were observed in the gingival tissus in the patients of NIDDM with CP than in those of CP(P0.05).Conclusion:RAGE may play a role in the destruction of periodontal tissues in NIDDM patients with CP.

Objective To study the effect of humic acid (HA) and soil on dissolution performance of depleted uranium (DU).Methods Using the static dissolve-adsorption experiment and inductively coupled plasma-mass spectrometry(ICP-MS) to determine uranium concentration and 235U/238U isotope ratios of the samples at different time and study the dissolution of DU in water.Results The solubility of DU in water was reduced by 90％ by adding HA.Soil could increase the solubility of DU in water by nearly 25％,adding an appropriate amount of HA could play a supporting role on the dissolution of DU,in this experiment adding 5％ of HA was best.Conclusions Soil and HA could produce positive and negative impact on the solubility of DU in water,and the combined effect of the two relied on the complex absorption and complexation reactions of soil,HA and dissolved uranium ions.

OBJECTIVE:To evaluate the effect of special rectification on the rational use of antibiotics and relieving bacterial resistance. METHODS:It was divided into groups based on the before and after 3 years of special rectification. The data of related index and bacterial resistance of antibiotics in the clinical use in 2 groups were compared. RESULTS:After special rectification, the use rate of antibiotics in inpatients was decreased from 77%to 55%,use intensity was decreased from 86 DDDs/(100 person· d) to 39 DDDs/(100 person·d),the prophylactic use rate of antibiotics for typeⅠincision surgery was decreased from 98% to 27%,the antibiotics prescriptions of patients in outpatient and emergency departments were respectively decreased from 36% to 12% and 49% to 23%. The submission rate of microbiological testing specimens was increased from 20.2% to 38.8%,submission rate of sterile site specimens was increased from 29.8% to 37.6%. The detection rate of fungus was decreased from 14.4% to 11.2%. The detection rates of Escherichia coli and Klebsiella pneumoniae producing extended-spectrum β- lactamases (ESBLs) strains were respectively decreased from 57.3% to 51.3% and 43.2% to 36.1%. The total detection rate of top 5 multi-drug resis-tant bacteria was decreased from 48.4% to 29.3%,however,the detection rate of Acinetobacter baumannii was increased to 80.7%,and the resistance rates of Acinetobacter baumannii to imipenem and meropenem were respectively 66.9% and 69.1%. There was an increasing trend for Klebsiella pneumoniae to 1,2 and 3-generation cephalosporins,piperacillin amoxicillin/tazobac-tam,imipenem,meropenem. CONCLUSIONS:Special rectification of antibiotics has obvious effect on the rational use of antibiot-ics and relieving bacterial resistance in the clinic,and it improves the management of clinical use of antibiotics in hospital. Howev-er,bacterial resistance situation is still grim,it needs to establish a long-term management mechanism of clinical use of antibiotics, strengthen the monitoring pathologic examination and monitoring of bacterial resistance,and strictly perform hand hygiene and dis-infection and isolation system.

Objective:To study the clinical outcome of lamellar keratoplasty combined with autogenous corneal stromal padding for treatment of corneal perforation.Methods:An observational case series study was conducted.A total of 14 patients (14 eyes) with corneal perforation underwent lamellar keratoplasty in Henan Provincial People's Hospital from January 2017 to August 2018 were collected.During the operation, the corneal stromal autograft was taken to pad the corneal perforation.Visual acuity, intraocular pressure, corneal epithelial healing time, infection recurrence, and the status of corneal graft and anterior chamber were recorded on the 1st, 7th, 14th day, 1st, 3rd, 6th, 9th and 12th month after operation.OCT examination of anterior segment was performed at 1 month, 6 and 12 months postoperatively to observe the interlamellar structure of corneal implantation bed and stromal graft, anterior chamber and iris.The safety and effectiveness of the operation were evaluated according to the 1-year follow-up.The study protocol adhered to the Declaration of Helsinki and was approved by the Ethics Committee of Henan Eye Hospital (No.HNEECKY-2019[18]). Written informed consent was obtained from each patient prior to entering the study cohort.Results:The healing time of corneal epithelium was 2-4 days after operation, (3.01±0.59) days on average.At one day after surgery, all patients had normal anterior chamber depth without aqueous leak and no double chamber was observed.The corneal grafts attached to the implantation bed well and showed mild to moderate edema.There was no recurrence of corneal infection ulcer two weeks after operation, and the corneal ulcer was healed and anterior chamber was well formed in 14 patients.The corneal graft was transparent, and the anterior segment OCT image showed corneal implant bed and graft were well attached, and the anterior chamber depth was normal three months after operation.The best corrected visual acuity of 9 eyes was more than 0.3 one year after operation, and the vision acuity of the 14 patients improved obviously, and no refractory glaucoma occurred after operation.Conclusions:Lamellar keratoplasty combined with autogenous corneal stromal padding is a safe and effective surgical procedure for treating corneal perforation.

Objective To investigate the relationship between metabolic syndrome (MS) and education level in Su-Xi-Chang area to provide evidence for healthcare policy making. Methods A clustered sampling of 6798 subjects from Su-Xi-Chang areas of Jiangsu Province was included. Questionnaires and physical examinations were completed to collect clinical data. Logistic regression was used to analyze weather education level could be an independent risk factor of MS. Results Significant differences were found in waist circumstance (WC) ,systolic blood pressure (SBP) and fasting blood glucose (FBG) among participants with different education level. Significant differences were also existed in triglyceride and diastolic blood pressure (DBP) between subjects with higher and lower education level ( P＜0. 05 ). In single-factor or multivariate analysis, education level was negatively correlated with the prevalence of MS (P＜0. 05 ). Conclusions Education level may be an independent risk factor of MS. People with low and moderate education level have higher risk of MS. Therefore,it is recommended that health-related information should become an integral part of the compulsory education system.

Background Xenotransplantation is arousing more attention of researchers because of the lack of corneal donors.Biological corneal scaffolds constructed by porcine corneal acellular stroma appears to have an acceptable biocompatibility.However,its clinical effects and the histomorphological features in the corneal tissue of receipts' are still unclear.Objective This study was to evaluate the viability of bioengineered corneas as a new material of human lamellar keratoplasty and observe the in viva biological features after human keratoplasty under the laser confocal microscope.Methods A prospective serial cases observational study was carried out.Fifteen eyes of 15 patients with infectious keratitis were enrolled in Henan Eye Hospital from February to August 2014 under the approval of Ethic Committee of Henan Eye Hospital and informed consent of each patient, including 4 eyes of fungal keratitis,1 eye of bacterial keratitis, 9 eyes of mixed infectious keratitis and 1 eye of leucoma.Corneal lamellar transplantation was performed on the eyes with the bioengineered corneas as grafts and the follow-up time was one year.The survival of grafts was assessed and scored, and the indices including corneal transparency,neovascularization, graft lysis or inflammatory recurrence and visual acuity (logMAR) were evaluated.The morphology and density of corneal epithelial cells and endothelial cells, corneal stroma and subepithelial neural fibers were examined by laser confocal microscope 3,6,9 and 12 months after surgery.Results Postoperative inflammatory response was seen 3 days and disappeared 7 days after surgery.The grafts were clear 1 month after surgery, and no corneal dissolution was found during the follow-up duration.Glaucoma occurred in 1 eye at 6 months and graft rejection occurred in another eye 12 months after surgery.The logMAR, corneal transparency scores and corneal neovascularization scores improved after surgery in comparison with before surgery,with a significant difference among various time points (x2 =92.63,59.37,10.50 ,all at P＜0.05).Complete epithelization of grafts was seen.Compared with the contralateral eyes,the morphology of epithelial cells was similar and endothelial cells were enlarged in the operated eyes.In addition,no stromal cell structure was seen in the corneal stroma in the operative eyes.Subepithelial nerve fibers appeared in 8 eyes at 6 months, but the fiber density was lower in the operated eyes than that in the contralateral eyes.Significant difference was found in epithelial cell density among different time points (F=1.48, P =0.22).The endothelial cell densities were (2 542 ± 119), (1 895 ± 129), (1 869 ± 135), (1 854 ± 101) and (1 844 ± 103)/mm2 before surgery and 3, 6, 9 and 12 months after surgery, showing significant differences between preoperation and postoperative time points (all at P＜0.05).The subepithelial nerve fibers densities were (1.26± 0.13),(3.62±0.81) and (5.98±0.44) mm/mm2 at 6,9 and 12 months after surgery,with significant differences between adjacent two time points (t'=-8.16 ,-7.24;both at P=0.00).Conclusions Bioengineered corneal grafts survive well in human eye after lamellar transplantation,which can reconstruct ocular surface and improve the visual acuity.Biological cornea can replace human corneal materials.

Background Fungal keratitis has poor prognosis and high blinding rate,so it is vital to identify the risk factors that affect the treating outcome and prognosis of fungal keratitis.Objective This study was to evaluate the clinical outcome of fungal keratitis and identify the affecting factors.Methods This was a series cases-observational study.A total of 267 eyes of 267 patients with fungal keratitis were included in Henan Eye Institute during January 2013 to January 2014.Eye examinations were performed including slit-lamp microscope examination,corneal smears,confocal microscopy,fungal culture and identification.Combined anti-fungal drugs were topically used in all eyes for the initial treatment then the treating regimen were selected based on the susceptibility testing.corneal lesion resection combined with conjunctival flap transplantation,lamellar corneal transplantation or penetrating corneal transplantation was performed respectively on the patients with poor curative effect after drug treatment.The clinical prognosis of the patients was graded and the affecting factors for clinical outcome were evaluated.This study protocol complied with Helsinki Declaration and was approved by Ethic Committee of Henan Eye Hospital.Written informed consent was obtained from patients or guardians.Results One hundred and eighty-five eyes were cured by anti-fungal eye drops with the effective rate of 69.29％,and the inflammation was controlled in 60 eyes who received combination procedure of anti-fungal drugs with different surgeries,while 22 eyes lost visual function because of refractory glaucoma and final evisceration.The total clinical effective rate was 91.76％.Aspergillus and Fusarium spp.appeared to be the most common pathogenic fungi by drug sensitivity test.The keratitis caused by Aspergillus had lowest cure rate among different fungi (x2 =11.350,P =0.002) and the most poor clinical prognosis (H=31.285,P =0.013).The medication curative rate was 71.8％ in the patients with positive culture outcome,which was higher than 62.5％ in the patients with negative culture outcome (x2=8.75,P＜0.01).A significant difference was found in the medication curative rate and prognosis between the patients with ≥ 2 kinds of sensitive anti-fungal drugs and the patients with ＜2 kinds of sensitive anti-fungal drugs (77.5％ versus 52.3％,x2 =9.63,P＜0.01;H=24.281,P =0.021).Size of infiltration area,with or without hypopyon,number of sensitive drugs,and pathogenic fungi were significantly correlated with clinical outcome (all at P ＜ 0.05).Conclusions In vitro susceptibility testing can guide clinical drug treatment of fungal keratitis.Infiltration area ＞ 16 mm2,hypopyon ＞2 mm,resistance to those drugs in vitro and infection of Fusarium.spp or Aspergillus.spp are predictors of a poor outcome.

Objective To develop a candidate reference method for the determination of sodium in serum by inductively coupled plasma mass spectrometry method (ICP-MS). Methods Aluminum, as internal standard of sodium, was added into serum samples and sodium standard solutions by gravimetric analysis. The samples were digested by HNO3 and diluted, and its 23Na/27Al isotope ratios were obtained by ICP-MS. The sodium concentrations were calculated with the standard curve method in serum. Results The analytical recoveries of sodium were 100.67% and 100.15% respectively, and the precisions were 0.08% and 0.04% respectively for 2 different serum samples. The results of measuring sodium in serum of Standard Reference Material (SRM) gave the coefficients of variation (CVs) of 0.18% and 0.22% for 2 levels of standard reference material(SRM) 909b and 0.41%, 0.41% and 0.66% for 3 levels of SRM 956b. The relative deviations between the results and median of the certified value were 0.17% and 0.14% for 909b and -0.09%, -1.05%, -0.48% for 956b respectively. Conclusions The ICP-MS and aluminum internal standard method is proved to be not only precise and accurate, but also quick and convenient for measuring sodium in serum. It is promising to be a candidate reference method for determination of sodium in serum.

Aim To study the vasodilation of MS23,a brand new phosphodiesteras inhibitor,on contractions induced by various stimuli in rings of arteries isolated from rat different organs.Method Tension of aortic and microvessel rings were recorded isometrically by PowerLab and DMT system respectively.Results MS23 concentration-dependently shifted the noradrenaline(NA)-induced concentration-contraction curves rightward in a non-parallel manner with the maximal contraction depressed by 74.7%.MS23 and aminophylline(Ami) produced concentration-dependent relaxation on KCl or NA-induced precontraction.Endothelium deprivation and NO synthesis inhibition induced by L-NAME failed to affect the relaxation.MS23 and Ami relaxed KCl-induced precontraction of rat coronary,middle cerebral,renal and mesenteric arterial rings in a concentration-dependent manner,and showed no organ preference in this respect.Conclusion MS23 antagonizes and relaxes contractions induced by various stimuli in the rings of arteries isolated from different organs of rat without marked preference among the organ origin of artery and stimuli.The vasorelaxation induced by MS23 is related neither to endothelium nor to nitric oxide synthesis.