OBJECTIVE In order to find the way to reduce nosocomial pneumonia through preventing delivery of microbio-aerosol.we investigate whether oxygen humidification process generate and deliver aerosol to the end of oxygen tube,and the difference between two types of humidifier.METHODS Two types of humidifier were used.One was unique bionic humidifier through surface of humidification material,the other was conventional bubble humidifier.The amount of aerosol was counted by laser particle counter at the end of oxygen cannula.Different solute of ferric chloride and soluble starch in two humidification materials were used to testify the generation and transmission of aerosol during oxygen therapy.RESULTS Bubble humidifier produced large amount of aerosol of 0.3,0.5,1.0,3.0,5.0 ?m at 31089.9、28488.6、2873.9、197、1.1particle/cubic meter respectively.Most of the aerosol were between 0.3 and 3 microns in diameter.While bionic humidifier produced small amount of aerosol of 0.3,0.5,1 ?m at 95.3,39.8,2.0 particle/cubic meter respectively,there were no aerosol particle larger than 3?m.The difference of 0.3,0.5,1.0,3.0,5.0?m aerosol between bubble and bionic humidifier was significant(P

Objective To explore change of peripheral blood CD5+B cells in the systemic lupus ery- thematosus(SLE)patients and the association of this change with the disease activity,Methods The percent- age of CD5~+B ceils in peripheral blood in 57 patients with SLE and 35 healthy controls was determined by flow eytometry.Levels of anti-dsDNA,complement C3 and C4,anti-nuclear antibody(ANA),anticardiolipin anti- body(ACL),were also measured.Results The percentage of CD5~+B cell in SLE patients(2.1?0.4)% was high- er than that in normal controls [(1.5?0.4)%](P＜0.05).In active disease group,the percentage of CD5~+B cells [(2.5?0.5)%] was significantly higher than that in inactive SLE patients [(1.4?0.5)% ](P＜0.01).The percent- age of CD5~+B cell associated with anti-dsDNA,ANA,ALA positively,with C3 negatively and had no associa- tion with C4.Conclusion The percentage of CD5~+B cells in the SLE is significantly high and has correlation and some relationship with the SLE.

Based on the released statistics from 1980 to 2009,this article summarized the scientific research awards gained by Xi' An health-related organizations. The analysis was mainly focused on the achievements of subordinate organizations of the city Health Bureau.In the end,the author discussed about the awards in aspects of quantity,level,institution,descipline,specialty and talents.

AIM: To investigate the effects of dehydroepiandrosterone (DHEA) on experimental osteoarthritis in rats. METHODS: Forty rats were randomly divided into four groups. Group A is normal control group. Osteoarthritic models of rats were established by intraarticular injections of papain into the right knee joints of groups B, C and D. Then the right knee joints of rats in groups C and D, respectively, received 150 ?l intraarticular injections of DHEA at a concentration of 50 ?mol?L~(-1) and 100 ?mol?L~(-1), and the right knee joints of rats in groups A and B both received 150 ?l physiological saline, twice weekly for five weeks. Six weeks later, all rats were sacrificed, and the articular cartilage was assessed by gross morphologic, histologic, biochemical and immunohistochemical methods. RESULTS: The cartilage damage in groups C and D was much less than that in group B through observation under a surgical microscope. The Mankin's score, nitric oxide (NO) in the douche of articular cavity, malondialdehyde (MDA) in synovium, the expression of matrix metalloproteinase-1 and 9 in articular cartilage in groups C and D decreased in comparison with group B, and the foregoing indexes in group D decreased significantly compared with group C. However, the activities of superoxide dismutase (SOD) in the douche of articular cavity and blood serum in groups C and D increased in comparison with group B, and the foregoing indexes in group D increased significantly compared with group C. CONCLUSIONS:DHEA shows a cartilage-protecting effect which is in a dosage-dependent manner. The mechanism probably is to inhibit the expression of matrix metalloproteinases and to decrease the release of (NO and enhance the antioxidation.

Aim To investigate the molecular mechanisms of differentiation in human leukemia HL-60 cells induced by diallyl disulfide(DADS)using suppression subtractive hybridization(SSH).Methods In our privious study,the subtractive cDNA library was constructed successfully and efficiently. 30 clones were randomly analyed with restriction enzyme.The inserts of cDNAs were analyzed by restrictive enzyme EcoR I.Positive clones were sequenced and the homology of resulting cDNA sequences were analyzed through bioinformatics software Blastn.Results 18 clones contained 100～600 bp cDNA inserts.10 differantiation genes were obtained and involved in cell cycle,signal transduction,metabolism and RNA binding.And 3 of 10 genes,p21,STAT1 and CAMTA1 were up-regulated and detected by RT-PCR,the results matched with SSH.Conclusion sThere are tight correlation between the differentiation induced by DADS and three-upregulated gene:p21,STAT1 and CAMTA1.

Adult ; Female ; Humans ; Motor Neuron Disease ; complications ; Neck ; pathology ; Thyroid Neoplasms ; complications

Virus inactivation with photochemistry is being suitable for blood or blood products, methylene blue (MB)/light treatment has been used for viral inactivation of cellular blood components. Twelve new phenothiazines derivatives were designed and synthesized, and were used to test viral inactivation and red cell damage preliminary. Results showed that compound YWW-7 has a satisfactory activity, it could be developed as a new viral inactivation agent for blood products.

Objective To observe effects of ganoderma lucidum triterpenoids(GLT) on learning and memory function and anti-oxidative ability of aging model mice induced by D-galactose. Methods Senile model mice were established by D-galactose hypodermic injection for 8 weeks.GLT had been administered to two therapy groups.All the mice of different groups were tested with Morris water maze.Then the mice were killed and biochemically assayed of total anti-oxidative capacity(T-AOC),superoxide dismutase(SOD) and malondialdehyde(MDA) in the brain. Results The model mice showed worse ability in learning and memory in comparison with control mice.The T-AOC activity and SOD activity in the brain decreased and the MDA content increased in model rats in comparison with control.GLT significantly improved the changes mentioned above. Conclusion GLT improved the learning and memory dysfunction in aging model mice by modulation of the anti-oxidative ability.

Objective This study was to investigate the association of certain single nucleotide polymorphisms (SNPs) of the ER with genetic susceptibility to ISS .Methods Genomic DNA was extracted from peripheral blood of children with ISS (n=355) and of normal growth and development individuals as controls from Jiangxi province (n=345) .The association between the ER gene polymorphisms with the height-related clinical traits was analysed .Results The allele T of rs6557177 is significantly lower in the ISS group than in the control group(P=0 .021 ,OR=0 .624) .The clinical indexes of two kinds of different genotypes were analyzed and compared ,there was no statistical difference(P>0 .05) .Conclusion The allele T of rs6557177 of ER gene is a protection factor of ISS .C gene and T gene grouping clinical parameters (hight ,weight ,IGF-1 ,IGFBP3 ,E2 and BMI) were analyzed and found no statistically significant difference .

Objective:To investigate the immunogenicity of SARS-CoV N DNA vaccine and the feasibility of live-attenuated Salmonella typhimurium as the carrier to deliver the N DNA vaccine.Method:The recombinant attenuated salmonella strain CS022 harboring the pcDNA-N DNA vaccine was constructed.And mouse was immunized with the recombinant strain via intranasal and oral routes.Cellular and humoral immune responses were assessed by ELISA,lymphocyte proliferation assays,ELISPOT and FACS.Result:The oral immunization with the transformed salmonellae elicited strong immune responses mainly including high level of N-specific antibody,a dramatic activation of IFN-?-secreting cells,a high level of lymphocyte proliferation,and a high level of activated CD8+ T cells.Conclusion:Live-attenuated Salmonella typhimurium could effectively deliver the SARS-CoV N DNA vaccine in vivo.These encouraging pre-clinical data provide a rational basis for undertaking a new immune style to investigate SARS vaccine.