Objective:To evaluate the effects of surface modification with different concentration silica sol through sol-gel processing on bond strength between dental zirconia ceramic and resin cement. Methods:Silica coating was prepared by colloidal silica sol with concentrations of 20%,30%,40% on dental Zirconia ceramic. 32 discs zirconia ceramic specimens were fabricated and randomly divided into four groups respectively after polishing and sandblasting.The ceramic surfaces of different groups were received different treatments:(1)silane couple agent;(2)20% silica coating and silane couple agent;(3)30%silica coating and silane couple agent;(4) 40% silica coating and silane couple agent. Each ceramic block was bonded to light curing composite resin. All samples were stored in distilled water at 37 degrees for 24 h before a shear bond test to measure the bond strength of the resin cement to the ceramic surface. Scanning electrical microscopy (SEM) and energy depressive spectrum (EDS) were used to analyze the silica coating. Results:Contents of surface silicon increased after modification with silica coating prepared by sol-gel method. Bond strengths of groups with silica coating were significantly higher(P

Objective To explore the neuroprotective role of propylene glycol alginate sodium sulfate(PSS) following cerebral ischemic reperfusion in rats.Methods Middle cerebral artery occlusion (MCAO) and reperfusion models were made using an intraluminal filament method.The rats in PSS treatment group were injected intraperitoneally with PSS(18.75 mg/kg) at 0,24 and 48 h after reperfusion,same quantity of normal saline was used in control group,sham-operation group and normal group.We studied neurological scores,infarct size,histological and ultrastructure changes of neurons and cell apoptosis.Results(1) The neurological score was(1.83?)0.75 in treatment group and(2.83?)0.75 in control group,the infarct size was((107.9?)12.1) mm~3 in treatment group and((150.3?)30.5)mm~3 in control group.The differences were significant between the two groups(all(P)0.05),and obviously decreased 6,12,24,48 and 72 h after reperfusion((P

Objective To investigate the effect of astragalus polysaccharide,a component of an aqueous extract of Astragalus Membranaceus roots,on differentiation and maturation of dendritic cells in vitro. Methods 30 BALB/c mice were randomly divided into three groups,normal control group,100,200 mg/kg APS intraperitoneal injection groups. After one week,weight the mouse spleen,account the splenetic index. Collect the mouse bone marrow cell,induced and cultured with rmGM-CSF and rmIL-4. With inverted microscope to investigate the morphous of DC cell. The phenotypes of DC were detected by flow cytometry and the expression of the GM-CSF protein in serum was tested by ELISA. Results Astragalus polysaccharide injection had obvious effects on the spleen weight of mice. The degree of CD11c and MHC-Ⅱ expression in 100 mg/kg and 200 mg/kg groups on flow cytometry were advanced significantly compared with that in normal control group,but the degree of CD80 and CD86 was not increased. And the expression of the GM-CSF protein in serum in 100 mg/kg group and 200 mg/kg group were both not increased significantly compared with nomal control group. Conclusion The intraperitoneal injection of astragalus polysaccharide could stimulate the proliferation of the pre DC in bone marrow. The angtigen presentation of DC might be enhanced,but this effects was not positive correlation with concentration of GM-CSF.

Adolescent ; Adult ; Aged ; Esophagus ; Female ; Foreign Bodies ; diagnosis ; surgery ; Humans ; Laryngoscopes ; Male ; Middle Aged ; Young Adult

Objective To investigate and compare the argumentativeness and attitudes towards thinking and learning between clinical nurses in general adult wards and wards for patients requiring particularity healthcare for the identification and development of core communication skills.Mettods “Argumentativeness Scale” and “Attitudes toward Thinking and Learning Survey” in Chinese were used to measure a convenience sample of 504 clinical nurses in seven hospitals.Results The scores in items reflecting rationality,positivism,empathy and acceptance in 247 nurses in wards for particularity heahhcare were significantly different from those nurses working in internal medical wards for adults with internal medical problems.Conclusions To develop harmonious interpersonal relationships in nurses,we should strengthen competencies in emotional regulation and rational thinking in nurses in wards for adults with in-ternal medical problems.

0.05, respectively), but those to noradrenaline (NA: 0.01?mol/L), histamine (His: 3?mol/L), and 5-hydroxytryptamine (5-HT: 0.1?mol/L), significantly reduced (P0.05, respectively). Under atropine or Ani pretreatment, the NA-, His- and 5-HT-elicited contractions in endothelium-denuded aorta were similar to those in endothelium-intact aorta. Conclusion Atropine and Ani can inhibit receptors-mediated constrictions of rabbit aortic vascular smooth muscle cells; the actions are endothelia independent.

Objective: To study the surgical strategy of portal vein organized thrombosis ( PVOT ) during liver transplantation ( LT ) . Methods: The clinical data of 41 patients with PVOT performed LT from January 2005 to June 2006 ( 359 cases ) in our institute was retrospectively analyzed . The reconstruction of portal vein ( PV ) were removing thrombosis in 22 cases , throm- boendovenectomy in 10 cases , PV to splanchnic varicose vein in 8 cases , cavoportal hemitranspo- sition in 1 case . Results: 1 case died of multiple organ failure , 1 case died of hepatic artery bleeding . Retransplantation and portosystemic shunt vein ligation were performed in 1 case 14 days after LT because of its insufficient PV flow 2 cases were found anastomotic stenosis and they were cured by balloon angioplasty and stent placement via hepatic vein . Other patients were followed up 6 to 20 months , all of them had normal PV flow . Conclusion: Thromboen- dovenectomy or removing thrombosis is applicable to manage PVOT during LT .

OBJECTIVE: To work out scientific computation and evaluation method for the working performance of dispensers so as to improve the service quality and motivate the enthusiasm of the dispensers.METHODS: The performance of each dispenser consisted of the coefficient of dispensing prescriptions and coefficient of colligation(weight ratio: 80%∶20%).The coefficient of dispensed prescriptions was derived from the number of prescriptions in the foreground(counter),the quantity of drugs dispensed and the number of dispensed prescriptions in the background;and coefficient of colligation was derived from the service quality and work performance of dispensers.The individual bonus was decided by his performance coefficient.RESULTS: The monthly quantitative evaluation indicators and evaluation results of the work performance and service quality of each pharmacist became available.As compared without this evaluation system,the differences among dispensers in performance coefficient and in dispensing error were markedly decreased after the practice of performance evaluation,and the irrational prescriptions were able to be corrected in time.CONCLUSIONS: The quantitative evaluation method has motivated the working enthusiasm of the dispensers and enhanced both the working efficiency and service quality.Besides,this system can be modified based on the practical situation to be generally approved.

AIM:To investigate the effects of poly (I:C) as virus mimics on iodine excess-induced chronic lymphocytic thyroiditis in NOD mouse. METHODS:Female,32 NOD mice were randomly divided into 4 groups:(1) control; (2) high iodine; (3) poly (I:C); (4) high iodine+poly (I:C). Nine weeks after administration,mice were sacrificed. The following parameters were determined:body weight,thyroid weight and anatomic form. Thyroid hormone (T4) in serum was measured by radioimmunoassay,the thyroid morphology was observed through HE staining,apoptosis was detected by TUNEL,the mRNA expression levels of TRAIL,TRAIL-sR1,ICAM-1 and CXCL10 were determined by the method of real time RT-PCR. RESULTS:Compared to control group and poly (I:C) group,the thyroid absolute weight and relative weight in high iodine group were increased (P0.05). CONCLUSION:Poly (I:C) aggravates chronic lymphocytic thyroiditis induced by excess of iodine associated with increase in infiltration of lymphocytes and induction of apoptosis.

Neurolymphomatosis(NL) is characterized by lymphomatous infiltration of the peripheral nervous system. We report a case of neurolymphomatosis(NL) which was confirmed by sural nerve biopsy. Sural nerve specimen from a 49-year-old female patient with weakness of limbs was examined with routine histochemical and immunohistochemistry staining, in which the first antibodies against CD3, CD20, CD45, CD45RO and CD68 were used. Numerous T-lymphoma cells invaded in the adipose tissue of epineurium of sural nerve. The nerve biopsy showed marked axonal degeneration of myelinated fibers. The clinical and histopathologic findings confirmed the diagnosis of neurolymphomatosis.