OBJECTIVETo study the filtration efficiency of a positive pressure powered air purifying medical protective equipment and the effect of the flow rate on the microenvironment of the equipment.

METHODSThe filtration efficiency of high efficiency particulate air (HEPA) filter was measured with the biologic aerosol of simulating virus (Escherichia coli bacteriophage f(2)). The simulation work was done at the walk rate of 4 km/h in summer. The effect of the flow rate on the oxygen content, the carbon dioxide content, the temperature and the humidity of the microenvironment of the equipment was investigated. The clinical experiments were conducted in three appointed hospital for fighting against SARS.

RESULTSThe HEPA filter could filtrate 99.99% simulating viruses in the air. When the flow rate ranged from 75 to 125 L/min, the microenvironment parameters of the equipment were: the oxygen content was between 19.6% and 20.1% (the physiological safety limit is more than 14.6%); the carbon dioxide content ranged from 0.43% to 0.57% (the physiological safety limit is less than 1.0%); the temperature was between 32.0 degrees C to 32.2 degrees C; the humidity ranged from 49.7% to 59.4% (the physiological safety limit is the temperature 31 degrees C and the humidity 85% or temperature 38 degrees C and humidity 50%). Each microenvironment parameter met the demand of a healthy person under the normal workload. In the clinical experiments, the doctors wearing the equipment who performed the tracheotomy for a SARS patient in a deep coma were not infected.

CONCLUSIONThe medical protective equipment can protect the doctor and nurse in SARS contaminated areas effectively and improve their work conditions.

Air ; analysis ; Air Microbiology ; Carbon Dioxide ; analysis ; Colony Count, Microbial ; Humans ; Humidity ; Occupational Medicine ; instrumentation ; Oxygen ; analysis ; Protective Devices ; Respiratory Protective Devices ; Temperature ; Ventilation

Objective To analyze the common outer membrane proteins (OMP)from Porphyromonas gingivalis (Pg)by surface enhanced laser desorption/ionization time-of-flight mass spectrometry (SELDI-TOF-MS) and to provide antigens for the subsequent experiments in screening vaccine for periodontitis therapy. Methods Four strains of Pg were cultured under anaerobic conditions. The common OMP was extracted through ultracentrifugation and SELDI-TOF-MS was employed to detect the expressions of proteomes by chip H50. The data was analyzed by Biomarker Wizard. ResultsFour kinds of strains of OMP fingerprint spectrum were obtained. Seventy-one proteins of PgATCC33277, 74 proteins of PgW83, 76 proteins of PgW301 and 72 proteins of Pg381 were captured by chip H50. Thirteen common proteins were identified according to fingerprint spectrum. There was only 1 of the 13 common proteins identified in NCBI protein bank. ConclusionsSELDI-TOF-MS has good reproducibility and high sensibility and can be used to identify the common OMP of Pg. The 13 proteins have a potential value in the screening vaccine candidate antigen sites for periodontitis.

OBJECTIVESTo determine whether -238G/A and -857C/T polymorphisms of tumor necrosis factor-alpha (TNF-alpha) gene promoter were associated with outcomes of hepatitis B virus infection.

METHODSA total of 246 HBV self-limited infected subjects and 443 chronic hepatitis B (HB) patients were recruited in this case-control study. TNF-alpha-238G/A and -857C/T gene promoter polymorphisms were examined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP).

RESULTSThe frequency of TNF-alpha-238 GG (90.7%) in chronic HB group was significantly lower than that (95.1%) in self-limited group (P = 0.041). The frequency of TNF-alpha-857 CC (79.7%) in chronic HB patients was significantly higher than that (70.9%) in self-limited infected subjects (P = 0.021). Multiple logistic regression analysis revealed that both TNF-alpha-238GA and -857CC were independently associated with chronic HB.

CONCLUSIONSTNF-alpha promoter variants are likely to play a substantial role in influencing the outcomes of HBV infection.

Adult ; Case-Control Studies ; Female ; Haplotypes ; Hepatitis B ; genetics ; physiopathology ; Hepatitis B virus ; pathogenicity ; Hepatitis B, Chronic ; genetics ; physiopathology ; Humans ; Male ; Polymerase Chain Reaction ; Polymorphism, Genetic ; Polymorphism, Restriction Fragment Length ; Promoter Regions, Genetic ; genetics ; Tumor Necrosis Factor-alpha ; genetics

·AIM: To explore whether the drainage angle could be reopened by surgery in patients with severe acute angle-closure glaucoma at " the greatest degree " of angle closure, and to study the treatment methods, such as double-paracentesis, phacoemulsification combined with goniosychialysis, and the effectiveness. ·METHODS: Retrospective observational case series. From November 2008, to November 2015, there were 33 patients with severe acute angle-closure glaucoma and 360° angle closure. Drug treatment showed no effect on them, so initial double-paracentesis ( anterior chamber paracentesis combined with vitreous paracentesis ) was applied. Then, either phacoemulsification combined with goniosychialysis or trabeculectomy surgery was performed after 7-14d, which was chosen based on the result of gonioscope during the surgery. The intraocular pressure, angle changes, and complications were observed. The follow-up period was 6mo to 3a. ·RESULTS: Of 33 participants enrolled, 32 had normal intraocular pressure after " double-paracentesis" ( 2 had normal intraocular pressure after laser peripheral iridotomy ). The mean intraocular pressure was significantly reduced from 53. 4 ± 10. 7mmHg to 16. 9 ± 13. 2mmHg ( t= 9. 21, P<0. 001 ) by applying " double-paracentesis", and 1 still had higher intraocular pressure. The mean intraocular pressure ( 16. 7 ± 4. 8mmHg ) was 0. 2mmHg lower after phacoemulsification than after" double- paracentesis " while there was no significant difference (t=0. 38,P>0. 05). One patient had abnormal intraocular pressure until 30d after phacoemulsification. Every participant had 360° angle closed before " double-paracentesis", 32 patients had opened angle ( mean 131. 8°± 111. 3°) after " double-paracentesis " and mean (228. 6°± 108. 3°) during phacoemulsification, and mean (234. 6°± 107. 2°) at 3mo after phacoemulsification. There was a significant difference between the post -paracentesis and intraoperative values ( t = 4. 52, P <0. 001 ). There was no difference between the intraoperative and postoperative values ( t = 0. 46, P>0. 05). No patients had serious adverse events. · CONCLUSION: For the " maximum degree " angle closure of severe acute angle-closure glaucoma, "double-paracentesis" combined with phacoemulsification can be chosen to open the angle gradually, and reduce intraocular pressure in vast majority of patients.

Objective To explore the diagnosis of small anterior communicating artery aneurysms and discuss the microsurgical techniques and the timing of surgical intervention.Methods Thirty-two cascs of small anterior communicating artery aneurysms were reviewed for the methods for lesion detection,imaging features of the lesions,microsurgical procedures and the patients'clinical outcome. Results CT displayed subarachnoid hemorrhage(SAH)in all the 32 cases.Magnetic resonance angiography(MRA) was performed in 13 cases and computed tomographic angiography (CTA)in 8 cases. All the 32 patients underwem a total of 35 examinations With digital subtract angiography(DSA).The time between operation and aneurysm rupture was less than 3 daysin 6 cases,4 to 14 days in 10 cases.10 to 14 days in 13 cases and over 30 days in 3 cases.Neck clipping of the aneurysm through the pterional approach was performed in all thc cases with tracheal intubation and general anesthesia,and hemorrhage due to ancurysm ruptures occurredin 5 cases during the operation.Death occurred in 1 case after the operation,and 5 patients developed hydrocephalus and received subsequent ventriculoperitoneal shunting.After the operation,22 patients showed good recovery,6 were capable of independent living, 2 needed assistance for walking and in daily activities, and 1 patient remained bed-ridden and needed nursing care.Follow-up of 27 patients for 3 to 12 months found no occurrence of hemorrhage or death.Conclusion DSA Can be the primary choice for diagnosis of small anterior communicating artery aneurysms.Earlyinterventions should be administered for grade I or Ⅱpatients,but for the other patients,the surgeries can be performed 2 or 3 weeks after the hemorrhage.Proficient microsurgical skills can be crucial for successful clipping of the aneurysms and for prevention and effective management of hemorrhage due to aneurysm rupture.

AIM To identify the in vivo metabolites of Cynanchum auriculatum Royle ex Wight extract in functional dyspepsia rats by UHPLC Q-Exactive Plus Orbitrap HRMS.METHODS The rat models for functional dyspepsia were established.The analysis was performed on a 40℃ thermostatic Hypersil GOLD C18 column(2.1 mm×100 mm,1.9 μm),with the mobile phase comprising of water(containing 0.1％formic acid)-acetonitrile(containing 0.1％formic acid)flowing at 0.3 mL/min in a gradient elution manner,and electrospray ionization source was adopted in positive and negative ion scanning.RESULTS Total 4 prototypes(baishouwubenzophenone,deacylmetaplexigenin,qingyangshengenin,syringic)and 110 metabolites were identified,12 of which were common metabolites in feces and urine,56 of which were unique metabolites in urine,42 of which were unique metabolites in feces.The metabolic pathway of prototypes contained phase Ⅰ metabolism(reduction,oxidization,etc.),phase Ⅱ metabolism(sulfonation,glucuronidation,etc.)and phase Ⅰ,Ⅱ composite reactions.CONCLUSION This effective and comprehensive method can lay the theoretical foundation for further discovery of potential active metabolites in C.auriculatum.

Soil microbes are the important indicator of soil quality. For exploring Chuanminshen violaceum planting to microbial effects in tobacco soil, this paper adopted Illumina MiSeq high-throughput sequencing to research the change of bacteria and fungi at the phylum and genus in the soil. The results showed that the Ch. violaceum planting increased the biodiversity of bacteria and fungi. The influence on fungi was greater than that on bacteria. It greatly increased the sequence of fungi, it obtained 32 978 16S rDNA and 32 229 18S rDNA sequence number. There was no change of the top three phylums in bacteria, but the content changed, Proteobacteria and Acidobacteria reduced by 1.73% and 1.4% respectively, and Actinobacteria increased by 0.65%. The advantage phylum Ascomycete in tobacco reduced by 27.99% to be second advantage phylum after Ch. violaceum planting, and the second advantage phylum Basidiomycete increased by 23.69% to become the first dominant fungi. At the genus, Ch. violaceum planting changed the order of dominant genus and the abundance was also changed. Some changed largely such as uncultured Acidobacteriaceae Subgroup-1, Gemmatimonas, Subgroup-2,uncultured Nitrosomonadaceae for bacteria, norank Sordariales, norank Agaricomycetes, Phialophora for fungi. Especially the rotation increased antagonistic microbes and physiological microbes and decreased pathogenic microbes. So the Ch. violaceum planting can improve the microbe community in tobacco soil.

Objective To investigate the morbidity and characteristics of adult osteonecrosis of the femoral head (ONFH) in Chengdu, and to further explore its related risk factors.Methods Self-designed questionnaires were used to collect data by the way of household or field survey. From January,2016 to February, 2018, a total of 544 cases (797 hips) diagnosed as ONFH were included in the study. The medical data including general condition, risk factors, diagnosis, disease stages and treatment were collected. Based on the data, the risk factors were analyzed statistically.Results The average age of 544 patients (392 males and 152 females) was 55 years old (range: 19 to 90 years); the bilateral incidence was 46.51% (253 cases). The proportion of Association Research Circulation Osseous stages was accounted respectively 3.64% for stage I, 6.15% for stage II, 8.41% for stage III and 81.81% for stage IV when confirmed ONFH initially. In all the reasons of ONFH, 52.39% were alcohol-associated osteonecrosis, 16.18% for steroid-induced osteonecrosis, 11.58% for traumatic osteonecrosis, 5.88% for dysplastic osteonecrosis, and 13.97% for other reasons.Conclusion The incidence of ONFH was higher in men than in women. Stages III-IV accounted for the highest proportion. The high intake of alcohol or overuse of steroid was the leading causes of adult ONFH, among which alcohol-associated osteonecrosis was the main for the males and steroid-induced osteonecrosis for the females.

Objective:To explore the potential synergistic protective mechanism of Glycyrrhizae Radix et Rhizoma-Granati Pericarpium formula compound by using the methods and tools of network pharmacology，and provide a basis for the modernization of traditional Chinese medicine（TCM） compounds and the discovery of new drugs. Method:Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform （TCMSP） was used to obtain the active components of Glycyrrhizae Radix et Rhizoma-Granati Pericarpium formula and their corresponding targets. The obtained targets were input to the UniProt database to inquire the gene names corresponding to the targets. By searching the CTD database，Genecards database and OMIM database of disease-related websites，the anti-sunburn targets were obtained. The interaction of the active targets was analyzed with online STRING database to screen the predicted core targets. The gene ontolog（GO） gene function enrichment analysis and Kyoto encyclopedia of genes and genomes（KEGG） pathway enrichment analysis of the predictive targets were performed by using DAVID database. Cytoscape 3.6.1 software was used to make "drug-component-target" network diagram，"protein-protein interaction" network diagram and "component-target-pathway" network diagram. Online website Draw Venn Diagram was used to show the relationship between disease targets and drug predicted targets. R Studio software was used to draw the functional enrichment analysis diagram of GO gene and KEGG pathway. Molecular docking between the active ingredients and the core targets was performed using GOLD software. Result:The 16 active compounds were collected，such as liquiritin，glycyrrhizin，kaempferol and quercetin. The active components mainly acted on 5 core targets：protein kinase B1（AKT1），interleukin（IL）-6，vascular endothelial growth factor（VEGFA），tumor necrosis factor（TNF） and tumor suppressor gene （TP53） and played a role in anti-sunburn effect primarily through these pathways such as hepatitis B，pathways in cancer，toxoplasmosis，chagas disease（American trypanosomiasis），and TNF signaling pathway. Conclusion:Based on the method of network pharmacology，the present study has preliminarily explored the anti-sunburn targets and pathways of Glycyrrhizae Radix et Rhizoma-Granati Pericarpium formula，and further verified the characteristics of multi-component and multi-target treatment of diseases in TCM，so as to provide certain scientific ideas for the modernization research of Chinese herbal compound prescriptions.