It is inevitably that any medical laboratory instrument may have trouble during its operation no matter how advanced it is.The only difference is the failure rate of each medical laboratory instrument.So in order to ensure these instruments work normally,it is very important to maintain them correctly.This paper gives an introduction of characteristics and maintenance requirements about medical laboratory instruments.

As a new cross disciplinary study, translational medicine is expected to promote modern biomedical research to a new stage. In recent years, establishment of research structure of translational medicine has been completed or initiated in some areas where medicine is comparatively well developed, though this conduct is still at an exploratory stage. Referencing abroad experience,This paper discusses the innovative mechanisms and strategies for organization of traslational medicine with referrence to foreign expericences.

The development of translational medicine requires knowledgeable and capable talents.In this study, by systematic analysis on scientific literatures published openly during 2010 till 2014, we comprehensively described basic circumstances pertinent to talent cultivation during global translational medicine development, and analyzed diathesis requirements for qualified talents, as well as cultivation strategies from employers perspectives, in terms of knowledge, skill, social roles, values, self-concept, trait and motive characteristics, with the aim to explore the premium cultivation paths for such talents.

Objective To investigate and analyze the recent condition of the indoor air radon concentration in the colleges in Guangzhou and to find the source of radon in the teaching environments and to make the effective measure to reduce indoor air radon pollution. Methods The radon concentration was determined with the instantaneous and accumulate methods. The effecting factors were analyzed. Results The arithmetic average of radon concentration was about (34.2?21.17) Bq/m3. The indoor radon concentration in the newly decorated buildings was about (36.6?25.5) Bq/m3 which was higher than that in the old ones (20.1?8.48) Bq/m3. The indoor radon concentration in the night was higher than that in the daytime. In winter it was about (54.2?15.11)Bq/m3 which was higher than that (17.3?7.31) Bq/m3 in summer. Conclusion The radon concentration may change as the outside condition changes, the radon concentration in the teaching environment in Guangzhou is not over the standard limit.

Background and purpose:Recently, studies showed that non-steroidal anti-inlfammatory drugs (NSAIDs) could reduce the incidence of cancer. Whether ibuprofen could inhibit the growth of hepatocellular carcinoma cells had not been reported yet. In the current study, we investigated the effects of ibuprofen on hepatoma carcinoma BEL-7402 cells and the relevant mechanisms. Methods: Hepatocellular carcinoma BEL-7402 cells were randomly divided into 7 groups:the control group and the ibuprofen groups (0.1, 0.5, 1.0, 2.0, 3.0 and 4.0 mmol/L). The effect of ibu-profen on BEL-7402 HCC cells was measured by MTT method, the cell cycles were analyzed by flow cytometry (FCM), cell vitality and apoptosis were determined by cell analyzer. PCNA, Cyclin D1, Bcl-2 and COX-2 protein levels were examined by Western blot, and the expressions of prostaglandin E2 (PGE2) were measured by ELISA. Results:After the exposure to ibuprofen, the suppression ratio of BEL-7402 cells was increased (P<0.05). BEL-7402 cell vitality was decreased by degrees significantly (P<0.05), early apoptosis of BEL-7402 cells was increased (P<0.05), and the G0/Gl phase ratio was increased significantly compared with control group (P<0.05). Ibuprofen effectively decreased PCNA, Cyclin D1, Bcl-2 and COX-2 expressions in BEL-7402 cells (P<0.05), and decreased PGE2 protein expression in cell culture supernatants sig-nificantly (P<0.05). Conclusion:Ibuprofen is effective for inhibiting the proliferations, increasing apoptosis and blocking cell cycles of BEL-7402 HCC cells. The anti-tumor mechanisms of ibuprofen may be related with the inhibition of COX-2 and PGE2 expressions.

Objective To investigate the distribution and antimicrobial resistance of gram-negative bacilli isolated from wound specimens of orthopedic patients,and provide reference for the rational use of antimicrobial agents. Methods 682 isolates of gram-negative bacilli were collected from orthopedic department in a comprehensive hospi-tal between January 2011 and December 2013, antimicrobial susceptibility testing results were analyzed. Results The main gram-negative bacilli isolated from wound specimens of orthopedic patients were Pseudomonas aeruginosa (P .aeruginosa)(16.72%),Escherichia coli (E.coli)(15.40%),and Enterobacter cloacae (E.cloa-cae)(12.76%).The detection rates of extended-spectrum beta-lactamase-producing E.coli and Klebsialla pneu-moniae (K .pneumoniae)were 54.29%(57/105)and 31 .43% (22/70)respectively,and mainly distributed in the trauma orthopedic department,accounting for 49.12% and 45.45% respectively.The susceptibility rates of E.coli, K .pneumoniae ,and E.cloacae to meropenem and imipenem were all 100.00%.The susceptibility rates of E.coli and K .pneumoniae to amikacin,piperacillin-tazobactam and amoxicillin/clavulanic acid were all >80%.Suscepti-bility rate of E.cloacae to most antimicrobial agents were 71 .26% -100.00% except for piperacillin(64.37%). Susceptibility rates of P .aeruginosa to most antimicrobial agents were >85% except for cefepime (78.95%)and aztreonam (65.79%).Conclusion Gram-negative bacilli are the most common pathogens in wound infection of or-thopedics patients.In order to use antimicrobial agents rationally and improve clinical treatment effect,it is impor-tant to realize the distribution of pathogens and antimicrobial resistance.

An HPLC-UV method has been developed for the determination of valibose, miglitol, voglibose and acarbose, the four anti-diabetic drugs. The separation was accomplished successfully by using reversed phase chromatography (Prevail carbohydrate column, 250 mm x 4.6 mm, 5 microm) with a gradient acetonitrile-phosphate buffer solution (pH 8.0) at a wavelength of 210 nm. Furthermore, the method of a high-performance liquid chromatography coupled with ESI-MS in positive ionization mode has been established. These two methods were successfully applied to the assay and qualitative detection of four alpha-glucosidase inhibitors in the potential counterfeit anti-diabetic drugs.

Objective To explore the effect of transcription factor E2F1 on the apoptosis of small cell cancer line H446. Methods Plamid vector- mediated E2F1 small hairpin RNA (shRNA) was used to silence E2F1 in H446 cell. RT-PCR and western-blot assay were used to detect the expressions of E2F1 and Bcl-2. The apoptosis rate in H446 cell line was detected by flow cytometry assay. Result E2F1 protein was suppressed in shRNA1-modified H446 cell. Sgnificant difference of the apoptosis was shown between E2F1 shRNA1 group and the other two groups. Additionaly, the expression of Bcl-2 protein increased in E2F1 shRNA1-modified cell line. Conclusions E2F1 is highly expressed in H446 small cell lung cancer cell line. E2F1 promotes apoptosis of H446 through upregulating Bcl-2 expression.

Objective To explore the value of ultra?high b?value DWI in diagnosis of prostate cancer in central gland. Methods Seventy?one consecutive patients, who were scheduled for prostate biopsy, were prospectively screened. T2WI, conventional DWI with b?value of 1 000 s/mm2 and ultra?high b?value DWI with b?value of 2 000 s/mm2 and 3 000 s/mm2 were performed in each examination. Twelve?core ultrasound guided prostate systematic biopsy was operated within 3 weeks after MRI examination. Images were interpreted based on prostate MR guidelines (PI?RADS) and were corresponding to histological results conducted by ultrasound guided prostate systematic biopsy. Using biopsy as the gold standard, the sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) were calculated for different imaging methods. Sensitivity and specificity differences between ultra?high b?value DWI and conventional DWI were analyzed using the McNemar test. The areas under the curves (AUCs) between ultra?high b?value DWI and other modalities were compared by using the Z test. Results Forty lesions were identified in the prostate central glands from the 33 sample patients in 71 examinees. Twenty two lesions were identified as prostate cancer in 15 patients and 18 lesions were identified as benign prostatic hyperplasia in 18 patients. MRI analysis of lesions in central gland, 27 (67.5%), 20 (50.0%), 32 (80.0%) and 35 (87.5%) were diagnosed accurately with the T2WI, conventional DWI and ultra?high b?value DWI (b=2 000, 3 000 s/mm2) respectively. The sensitivity and specificity for ultra?high b?value DWI was 90.9%and 83.3% with a b?value of 3 000 s/mm2 and was 86.4% and 72.2% for 2 000 s/mm2. These values were significantly higher than conventional DWI with a b?value of 1 000 s/mm2 (59.1%and 38.9%, P<0.05). The detection of lesions was comparable with ultra?high b?value DWI at 2 000 s/mm2 and 3 000 s/mm2 (P>0.05). The AUCs were 0.674, 0.510, 0.793 and 0.871 in T2WI, conventional DWI and ultra?high b?value DWI at 2 000 s/mm2 and 3 000 s/mm2 respectively. ROC analysis showed greater AUCs for the ultra?high b value DWI, than for the T2WI and conventional DWI (P<0.05). Conclusion The ultra?high b?value DWI is a valuable MRI modality in the diagnosis of prostate cancer in central gland.

Objective To establish a flow cytometric method for the detection of alkaline phosphatase (ALP) expression on the membrane of neutrophils (mNAP).Methods EDTA-K2 anticoagulant venous bloods were collected.Expression of mNAP in peripheral blood was measured by flow cytometry using a phycoerythrin (PE)-labeled anti-ALP monoclonal antibody.BD QuantiBRITE PE was used to generate a calibration curve for PE fluorescence and ratios of PE to anti-ALP antibody and detect the bound ALP antibodies per cell (antibodies bound per cell,AB/c).Preanalytical handling including anticoagulants (EDTA-K2,citrate,and heparin),storage temperature,storage time,and plasma ALP were optimized and measured the precision.The expression levels of mNAP from 481 healthy controls were measured to establish a clinical reference range.The mNAP levels of 84 patients with severe infection and local infection,39 patients with virus infection were determined by this method.Results For preanalytical handling,application of PBS washing can effectively eliminate the interference of plasma ALP.The mNAP levels were not influenced by different anticoagulants and storage conditions (stored for 12 h either at room temperature or 4 ℃).This method had preferable reproducibility (CV in batch were 2.01％-3.33％,average 2.67％ ; CV between batch were 5.80％-6.00％,average 5.90％).The median (quartiles) of mNAP in health controls were 1 758 (1 378-2 310) AB / c for men and 1 897 (1 369-3 249) AB / c for women.There was no significant difference between genders (U =27 140,P =0.243 8).The clinical reference ranges (2.5 percentile to 97.5 percentile) of mALP was 920.5-3 493.0AB / c.The expression levels of mNAP of patients with bacterial infections (13 532,9 756-16 869 AB / c) were significantly higher than those of patients with virus infection(1 143,536-2 012 AB / c) and healthy controls (1879,1399-2497 AB / c) (H=221.5,P＜0.01).Conclusion BD QuantiBRITE PE kit can be used to standardize flow cytometer settings and quantitatively detect molecules per cell.The flow cytometric method for detection of mNAP has important clinical application for differentiating bacterial and virus infection.