Objactive:To study the color changes of SY-1 silicone elastomer before and after polymerization.Methods:L*a*b*color parameters of 10 samples of SY-1 silicone elastomer were measured with Minolta chroma-ticity instrument(CS-321) before and after polymerization.The color difference(△E) between precure and post-cure was calculated as△E =[(△L)2+(△a)2+(△b)2]1/2.Results:After polymerization L*and a*valueswere increased(P

Objective: To find out the infinity optical thickness of SY-1 silicone elastomers when color difference(△E) is equal to 1.5 . Methods: Silicone elastomer samples with thickness from 0.5 mm to 10 mm of SY-1 silicone elastomer were measured by CIE-1976-L *a *b * relative to CIE source against a white and a black background by using Minolta colorimeter . Color difference was calculated as △E=[(△L *) 2+( △a *) 2+(△b *) 2] 1/2 . The infinity optical thickness of SY-1 silicone elastomer when △E=1.5 was calculated by regression formulation. Result: When △E was equal to 1.5, the infinity optical thickness of SY-1 silicone elastomer was 7.60 mm. Conclusion: In order to get ideal effect the supports should be treated with colorant when the thickness of silicone elastomer covering the surface of supports in maxillofacial prostheses is thinner than 7.60 mm.

Objective To grasp the development of private hospitals of traditional Chinese medicine (TCM) from a macro level;To provide reference for stakeholders by analyzing the underlying database of TCM private hospitals. Methods By analyzing the TCM database of hospital health agency annual statement from“National Health Statistical Investigation System”, current status of TCM private hospitals were analyzed from the aspects of organization, personnel, beds, number of service, and patient burden. The developing level of TCM was reflected by comparison with public hospitals. Results By the end of 2013, there were 938 TCM private hospitals, accounting for about 26.13% of TCM hospitals. Average annual growth rate of beds, health technicians, outpatient visits, and discharged patients exceeded 10%, while the hospital degree, bed utilization ratio, physician burden, and average length of stay for discharge patients were only 70%of TCM public hospitals. Conclusion TCM private hospitals have achieved rapid development in the number of these indicators, but the service efficiency, scale and level are still far behind TCM public hospitals.

Objective:To develop a perioral force measurement system for the infants with cleft lip and palate.Methods:The peri-oral force measurement system of infant with cleft lip and palate is composed of hardware and software.The sensor is metal cantilever. The measurement ranges are 0 -20 and 0 -1 00 g/cm2 ,and the precision is 0.1 g/cm2 .The system was used in 4 cases of infants with unilateral cleft lip and palate before and after cheiloplasty.The results were analyzed by SPSS 1 9.0 software.Results:Before cheilo-plasty the perioral force of labial frenum area was (1 .79 ±0.94)g/cm2 ,that of angulus oris area of normal side and cleft side was (5. 41 ±1 .01 )g/cm2 and (3.1 2 ±1 .55)g/cm2 (P <0.05);after cheiloplasty:the perioral force of labial frenum area was (1 2.73 ±3. 51 )g/cm2 ,that of angulus oris area of normal side and cleft side was (7.64 ±1 .64)g/cm2 and (7.27 ±1 .89)g/cm2 .Conclusion:The perioral force measurement system can be used to measure the perioral force of the infants with cleft lip and palate.

Objective To determine the effects of enflurane and isoflurane on the spontaneous neural discharge of central amygdaloid nucleus in rats Methods SD rats (30 60 d) of either sex were decapitated Brain was immediately removed and kept in 4℃ artificial cerebral spinal fluid(ACSF) which was balanced with 95% O 2 and 5% CO 2 gas mixture Braine tissue containing central amyfdaloid nucleus was cut into slices of 300 400?m thick which were immersed in ACSF Enflurane and isoflurane were administered by balancing ACSF with enflurane (1 5%,3 0%,4 5%) or isoflurane (1 1%,2 2%,3 3%) The spontaneous neural discharge of central amygdaloid nucleus was measured before and after enflurane or isoflurane using whole cell patch clamp techniques Results Enflurane and isoflurane inhibited the frequencies of spontaneous neural discharge of central amygdaloid nucleus in a dose dependent manner The spontaneous neural discharge inhibited by enflurane (3 0%) and isoflurane (2 2%) could recover after the slices being washed with normal ACSF for 5 min Conclusions The results indicate that the spontaneous neural discharge of central amygdaloid nucleus can be inhibited reversibly by enflurane and isoflurane Central amygdaloid nucleus may by one of the sites of action of enflurane and isoflurane in central nervous system

Aim To observe the correlation between the TPL's suppression on myofibrolbasts(MFBs)activation and TGF-β1/ERK/Smad3 pathway by performing in vivo and in vitro experiments.Methods In vitro model of MFBs activation was set up by stimulating fibroblasts with TGF-β1,and in vivo model of MFBs activation in radiated lung tissue was built by thoracic radiation on C57BL/6 mice.MFBs activation was analyzed by detecting the expression of α-SMA(using RT-PCR and Western blot)and Col Ⅰ(using RT-PCR and ELISA methods).The levels of p-ERK,p-Smad3(Ser208)and p-Smad3(Ser423)were measured by Western blot.ERK siRNA and Smad3 siRNA were used to observe the status of ERK and Smad3 in MFBs activation.Results TGF-β1 activated p-ERK/p-Smad3(Ser208)and p-Smad3(Ser423),increased the expression of α-SMA and synthesis of Col Ⅰ,which indicated MFBs activation.siRNA knockdown assay showed that both ERK and Smad3 were involved in regulating the levels of α-SMA and Col Ⅰ,and ERK influenced MFBs transformation possibly through its phosphorylation of Smad3(Ser208).TPL treatment inhibited the phosphorylation activation of ERK,Smad3(Ser208),Smad3(Ser423)in vitro and in vivo,therefore significantly reduced the level of α-SMA and Col Ⅰ,and the number of activated MFBs was decreased.Conclusion TPL mitigates radiation-induced pulmonary fibrosis by inhibiting the activation of MFBs,which is partly through suppressing TGF-β1/ERK/Smad3 pathway.

Objective To explore the role of matrix metalloproteinase 9(MMP-9)and tissue inhibitor of metalloproteinase-1(TIMP-1)in patients with acute exacerbation of severe chronic obstructive pulmonary diseases (AECOPD)treated with glucocorticoids.Methods The serum levels of MMP-9 and TIMP-1 were measured by ELISA in 41 patients with AECOPD before and after treatment with glucocorticoids and in 40 patients with regular methods(control group).Results ①After treatment with glucocorticoids,the serum levels of MMP-9(189.25±52.38)μg/L、TIMP-1(198.38±43.45)μg/L,ratio of MMP-9/TIMP-1(0.92±0.37)were decreased significantly than before((246.10±68.64)μg/L,(217.63±62.34)μg/L,(1.09±0.23))(P<0.01,P<0.05,P<0.05);but there were no differences(P>0.05)in regular methods(control group);② After treatment with glucoeorticoids, FEV_1、FEV_1%((0.83±0.35)L,(46±17)%)were impmved than before((0.72±0.48)L,(34±15)%)(P<0.05).Conclusions After treatment with glucocorticoids,the serum levels of MMP-9、TIMP-1、ratio of MMP-9/TIMP-1 from patients with COPD were decreased significandy,and FEV_1、FEV_1%were improved significant;Glucocorticoids can alleviate severs AECOPD to some degrees,which might be related to improving the imbalance of MMP-9/TIMP-1.

Objective To investigate the prevalence of virulence genes(ply, pspA, nanA, lytA, psaA) among Streptococcus pneumoniae recently isolated from clinical patients. Methods The 133 strains were isolated from patients in three teaching hospitals in Chongqing from 2006 to 2008. Polymerase chain reaction was used to screen for virulence genes (ply, pspA, nanA, lytA, psaA). Results The positive rate of lytA, psaA, ply, nanA and pspA in 133 clinical isolates were 94.7%, 85.0%, 82.7%, 84. 2% and 60.2%, respectively. The positive rates of the lytA, psaA, ply, nanA and pspA genes in 87 common serotypes isolates was 100%, 87.4%, 86.2%, 89.7%, 67.8%, respectively. Conclusion The total positive rates of five virulence genes in the 133 clinical strains were high. The positive rates of five genes in the com-mon serotypes isolates were higher than those in the no-common serotypes. These genes are important virulence genes of Streptococcus pneumoniae. They could be candidates for protein vaccine of Streptococcus pneumoniae.

Objective: To evaluate the corrosion resistance of Ni-Cr alloy with different coatings in neutral and acid saliva by electrochemistry method. Methods: Measured the self-corrosion potential (Ecorr) and polarization resistance(Rp) curves of Ni-Cr alloy models with different coatings in neutral and acid artificial salivas. Results: The Ecorr of the Ni-Cr alloys all showed positive values, the electrochemistry corrosion and galvanic corrosion were not detected. Conclusion: Ni-Cr alloy with titanium nitride coating, gold electroplating coating, gold-paste layer and gold-porcelain blended layer have both anti-corrosion and esthetical function without changing its own property.