The control system of the French standard mobile BSL-3 is introduced.The working mode and opening or closing sequence is analyzed.The power safety design,the pressure ladder control using transducer and temperature control method are especially introduced in detail.Advanced control technique is summarized and some defects used in China are provided.Technical support is provided for the using and maintaining of the lab.

Objective To establish the quality standard of Alatan Wuwei Pill. Methods Chebulae Fructus and Granatii Fructus were identified by TLC. Gallic acid and ellagic acid in Gardeniae Fructus and Granatii Fructus were determined by HPLC. Results The TLC spots developed were clear. Gallic acid showed good linear relationship in the range of 0.058 72-1.056 96 mg (r=1.000 0), the average recovery was 99.15%(RSD=1.3%). Ellagic acid showed good linear relationship in the range of 0.079 64-1.194 6 mg (r=1.000 0), the average recovery was 100.02% (RSD=2.3%). Conclusion The method is simple and reproducible. It can be used to control the quality of Alatan Wuwei Pill.

To explore the electromagnetic compatibility in the shelter hospital system to adapt it to the future complex electromagnetic environment. The factors for electromagnetic interference were analyzed, and some measures were put forward including separating the interference source from the sensitive device, setting up shielding space, applying grounding measures, eliminating interference signals by filtering and etc. The electromagnetic compatibility in the shelter hospital system was detected through electromagnetic self-compatibility test and electromagnetic environ-mental suitability test for external radio frequency. Simulations and tests proved that the failures and mal-re-sponse due to electromagnetic interference were avoided in the shelter hospital system. The electromagnetic compatibility scheme can meet the requirements of emergency medical facilities for electromagnetic protection in field conditions.

Objective To investigate the effect of endothelial progenitor cells (EPCs) which complexed with neuron stem cells (NSCs) after transplanted into ischemia and reperfusion (I/R) rat model on the proliferation and apoptosis of the NSCs and vasal construction. Methods Totally 150 SD adult male rats were randomly and equally divided into 5 groups, sham-operation group, I/R group, I/R+NSCs group, I/R+EPCs group, and I/R+NSCs+EPCs group. The rats were further divided into 5 subgroups according to the time points of 3, 7, 14, 30 and 60 d after transplantation. I/R rat model was established by reversiblyligating middle cerebral artery occlusion. NSCs were derived from the hippocampus of SD rats born in 24 h and identified with Nestin staining. EPCs were obtained from the artery blood of SD rats and verified with immunocytochemical stainings of CD31, CD34 and KDR after culture. The complex of NSCs and EPCs was produced with aid of laminin. Then the complex were transplanted into the ischemia penumbra of corresponding model rat brain. The proliferation and apoptosis of NSCs, and the fomation of new vessels were observed through immunohistochemistry and double-labeled immunofluorescence staining. Results The proliferation of NSCs was increased, apoptosis cells were decreased and the new vessels were raised in the complex transplantation when compared with single NSCs or EPCs transplantation groups. Conclusion The complex of NSCs and EPCs transplantation improves the proliferation of NSCs, suppresses cell apoptosis and promotes the formation of new vessels.

Objective To explore the effect of the complex containing neuron stem cells(NSCs)and endothelial progenitor cells(EPCs)after being transplanted to ischemia and reperfusion rat model on the differentiation of neural stem cells to neuron and synapse formation.MethodsTotally 300 SD adult male rats were randomly divided into sham operation group,middle cerebral artery occlusion(MACO)model group,MACO+NSCs group,MACO+EPCs group,and MACO+complex group,and every group were further divided into 6 subgroups according to time points 1,3,7,14,30 and 60 d after operation,NSCs were isolated from the hippocampus of neonatal SD rats born in 24 h and identified with Nestin staining.EPCs were obtained from the artery blood of SD rats and verified with immunocytochemical stainings of CD31 and CD34 after culture.NSCs and EPCs were cultured together to produce the complex with aid of laminin.Then normal saline,the NSCs,EPCs,or complex(2?1010/L)were transplanted into the ischemia penumbra of corresponding model rat brain,sham control or MACO rats.The differentiation of NSCs,the expression of P38,synapsin-I,mRNA of connexin 43 were observed with double label immunofluorescence technique,immunohistochemical method,RT-PCR and Western blot analysis in ischemic penumbra.ResultsCompared with other groups,there were more double Brdu and neural special enolase positive cells in MACO+complex group with the increased expression of P38.RT-PCR and Western blot analysis indicated that MACO+complex group had significantly higher expressions of synapsin-I at mRNA and protein levels in ischemic penumbra,and so did the mRNA expression of connexin 43.ConclusionThe transplantation of the complex of NSCs and EPCs improves the NSCs differentiation to neuron,synapse formation and reconstruction of neural network.

Objective To explore the relationship between angiogenesis and ischemic neurological deficit repair through exogenous interventions,and investigate optimal intervention routes for angiogenesis in cerebral ischemia rats.Methods Totally 240 SD rats were randomly divided into sham operation group,ischemic control group,ischemia and vascular endothelial growth factor(VEGF) group [1 653.3 ng/(g?d),i.p.,for 10 d],ischemia and endothelial progenitor cell transplantation(EPCs) group(2?1010/L,10 ?l),ischemia and anti-VEGF monoclonal antibody group [3 mg/(kg?d),i.p.,for 10 d].Cerebral microvessel density,somatosensory evoked potentials(SEP) and motor evoked potentials(MEP) and behavior were observed in 1,3,7,14,30 and 60 d after injury.Results New blood vessel density of ischemia and VEGF group,ischemia and EPCs group were significantly higher than ischemic control group in all time points besides 1 d after injury(P

Objective To evaluate the safety and effectiveness of mechanical thrombectomy with Solitaire AB stent in the treatment of large intracranial artery occlusions.Methods The calinical data of 15 patients with acute stroke(more than 3.5 h intravenous thrombolysis time window) who were carried out arterial embolectomy with Solitaire AB stent in the No.264th Hospital of the Chinese People's Liberation Army were retrospective analyzed.There were 11 cases of middle cerebral artery(MCA),2 cases of internal carotid artery (ICA),1 case of vertebral artery(VA) pluse basilar artery(BA),and 1 case of anterior artery(AA).The recanalization occluded situation and surgical complications were analyzed,NIHSS score of preoperatively and at discharge were compared.Results In 15 cases,there were 14 cases of totally recanalization,1 case of partial recanalization.Two case with MCA stenosis and 1 case with VA stenosis after the recanalization were accepted stent angioplasty,2 csase died.NIHSS score of 13 cases survival patients increased from (22.85±4.75) scores on admission to (4.39 ±3.67) scores out of hospital,and the difference was statistically sinificant(t=2.752,P ＜0.01).Conclusion The mechanical thrombectomy with Solitaire AB stent can get high recanalization rate,fewer complications and good clinical outcome on patients with large intracranial artery occlusions.For more than venous or arterial thrombolysis time window,the mechanical thrombectomy can be considered within the 8 h after comprehensive evaluation.

Objective To investigate the relevance between protein expression and methylation of MG-MT and hMSH2 in glioma patimts.Methods Immunohistochemical and methylation specific PCR were adopted respectively to test on 275 cases of glioma patients for the protein expression and methylation situation of MGMT and hMSH2.Results The negative protein expression rate of MGMT and hMSH 2 in the tissue of brain golima were 47.2% and 62.5% respectively;the occurrence of methylation in gene promoter region were accordingly 41.8% and 22.4%.Statistical analysis revealed that MGMT promoter methylation in peripheral blood gene groups was related with the protein negative expression of tumor tissue (P<0.05),while there was no relationship between the protein expression of hMSH2 and its gene promoter methylation(P>0.05).Conclusion The meth-ylation of MGMT is a common molecular situation in the generation of brain glioma ,which may be connected with that of tumor.However,hMSH2 promoter methylation might not the main reason for inactivation of hMSH 2 pro-tein,there may be other important factors affecting its expression .

Objective To investigate the effect of carboxyl methyl chitosan on hypertrophic scars by establishing a hypertrophic scar model on the ventral side of rabbit ears.Methods Full-thick-ness excisional wounds,1 cm in diameter,were made in the ears of 12 adult New Zealand white rabbits,and 123 hypertrophic sears were made in all.Then the rabbits were divided into 3 groups:group A was an experimental group (carboxyl methyl chitosan,500μg/ml),group B was a control group 1 (triamcinolone),and group C was control group 2 (physiological saline).All the scars were injected with drugs on the 30th and 40th days after operation,and then the samples were collected on the 35th and 45th day and analyzed.Results Compared with group C,group A appeared to be flatter,softer,and lighter in color;the area density of fibroblast decreased using HE stain and masson stain (P<0.05),and hydroxyproline content and hypertrophic index were also lower than group C (P<0.05).There were no significant differences of those criteria between group A and group B (P>0.05).Conclusion Injection of carboxyl methyl chitosan into Iocal hypertrophic scars On rabbit ears has similar effects to triamcinolone,and both of them can prevent and cure hypertrophic scars in proliferative stage.

Objective To evaluate the effect of low-dose colonic CT scanning in image quality and lesion revealing with different noise idex.Methods Model group:in order to find the optimal scanning parameter range,small simulated polyps in pig colon was prepared and mA was modulated by regulating noise index.Images were reprocessed with CT colonography and Raysum reconstructions.Image quality and the lesion revealing situation were evaluated and scored based on both reconstructive and axial images.The study of patient group was prospective and continuous.All positive cases were comfirmed by biopsy or surgery pathology.Two groups of patients were enrolled.First group(39 cases from January 2007 to June 2007):patients were divided into three sub-groups randomly(15 cages with NI=10,13 cases with NI:13,11 cases with NI=16),while NI was not changed with position.Second group(32 cases from Jury 2007 to January 2008):patients were scanned and NI was changed with different position(NI=10,20).The average X-ray radiation values of two patient groups were compared with standard values.All data were processed with rank sum tesL Results First group:when NI=10,the average scores of axial and constructive images were 4.2 and 2.4 respectively,when NI=13,those were 3.2 and 2.5 respectively,When NI=16.those were 2.9 and 2.7 respectively.and the average CTDlw were 17.51,12.90 and 5.94 mGy respectively.When NI increased,the average scores of axial decreased(H=20.01,P＜0.01),the average scores of constructive images did not changed(H=0.81,P＞0.05).Second group:when NI=10,the average scores of axial and constructive images were respectively 3.6 and 2.3,when NI=20,those were 2.2 and 2.3 respectively,and the average CTDIw was 11.63 mGy.When NI increased from 10 to 20,the average scores of axial decreased(H=20.84,P＜0.01),the average scores of constructive images did not decreased(H=0.29,P＞0.05).In the first group,the average CTDIw wag reduced by 35.0%,52.1%and 77.9%respectively when NI was 10,13 and 16.In the second group,the average CTDIw Was reduced by 56.8%.Conclusions Auto-mA low-dose CT scanning could reduce X-ray radiation obviously,while not affecting image quality.