Internet-based tendering makes equipment purchase convenient, rapid, effective, economical and fair. The issues that should be paid attention to are also described.

Objective To investigate the mechanism of Acinetobacter baumannii resistant to carbapenems.Methods E test and microdilution were used to determine the minimum inhibitory concentrations(MIC) of 11 antibiotics against 30 isolates of imipenem-resistant Acinetobacter baumannii strains.The production of ?-lactamase was detected by improved three-dimensional test.Nine coding genes of?-lactamase were detected by PCR.Results The resistance rates of 11 antibiotics were over 90% except for polymyxin B(23.3%) and ciprofloxacin(87.7%).Among 30 isolates of Acinetobacter baumannii the positive rate of single ESBLs,single AmpC,ESBLs+AmpC,non-ESBLs non AmpC?-lactamase was 33.3%(10/30),3.3%(1/30),23.3%(7/30) and 26.7%(8/30) respectively by three-dimensional test.The coding genes:VIM-1,VIM-2,OXA-24,CTX-M-2,IMP-1 and VEB-1 were undetectable.Two or three of coding genes:OXA-23,PER-1 and AmpC were detectable in 27 isolates,and their homologies compared with corresponding sequences of GenBank were more than 98%.A nucleotide mutation(A→C) at 617 site of PER-1 gene was found in No.26 strain,so this sequence was registered in GenBank(Accession No.DQ341275).Conclusions Carbapenems resistance in Acinetobacter baumannii related with the production of OXA-23,PER-1 and AmpC.

Objective To investigate the clinical status of post-core crown in anterior teeth aesthetical restoration and to observe its effect. Methods 126 cases of anterior teeth in patients with mild deformity,restored with post-core crown after informed consent meanwhile conducted clinical follow-up observation. Results In addition to 2 cases of disease after root canal treatment, 1 incisal and labial surface of porcelain fracture, other cases achieved desired results in the way of self-satisfaction,clinical efficacy and x-ray observation and periapical films. Conclusion Post-core crown in anterior aesthetical restoration has a unique position and clinical efficacy.

PURPOSE: This study aimed to identify the effects of illness perception and health beliefs on the quality of life (QOL) of breast cancer patients. METHODS: A cross-sectional study was conducted. Data were collected using questionnaires administered to 200 patients admitted for chemotherapy after a partial or total mastectomy at a university hospital in Yanji City. The data were analyzed using t-tests, analysis of variance, Pearson's correlation coefficients, and hierarchical regression analysis. RESULTS: The QOL of the breast cancer patients was significantly correlated with health beliefs and a subfactor of illness perception. The significant factors influencing QOL were understanding illness and feeling threatened, accounting for 31.7% of the variance in QOL. CONCLUSION: Illness perception of breast cancer patients had a negative influence on QOL, whereas health beliefs affected it positively. An implication of this study's findings is that interventions to reduce negative illness perception can improve the QOL among breast cancer patients.
Breast Neoplasms ; Breast ; China ; Cross-Sectional Studies ; Drug Therapy ; Humans ; Mastectomy, Simple ; Quality of Life

Objective To detect EPPB41L3 methylation frequency difference between esophageal squamous cell carcinoma (ESCC) tissues and the normal tissues and between ESCC patients′plasma and healthy volenteers′plasma, and to analyze the correlation with clinicopathological parameters. Methods We collected esophageal squamous cell carcinoma tissues (n = 42 patients) and adjacent surrounding normal tissues (n = 42 patients), and plasma from 42 patients with ESCC and from 50 healthy individuals. We used methylation specific PCR (MSP) combined with agarose gel electrophoresis to detect the methylation status of the EPB41L3. We used the SPSS 13.0 software for statistical analysis by χ2 test and Fisher′s exact test. Results EPB41L3 frequency of methylation was significantly higher in tumor tissues than in the adjacent tissues (59.5% vs. 4.8%), the difference was statistically significant (χ2 = 28.873, P < 0.001). For plasma, EPB41L3 methylation frequency was 31.0%in cancer patients, while was not detectable in the healthy volunteers. Methylation of EPB41L3 in tissues was more frequently found in patients with tumor size of ≥ 5 cm or T3 than in patients with tumor size of < 5 cm or T1-2. Conclusions The methylation frequency of EPB41L3 is higher in ESCC tissues than in control normal tissues, and higer in plasma from ESCC patients than that from the healthy volunteers. EPB41L3 methylation is more frequently found in patients with more advanced disease.

AIM: To establish human umbilical vein endothelial cells (HUVECs) to express green fluorescent protein (GFP), and to study the suppression of GFP by siRNA in HUVECs. METHODS: Using lipofectamine 2000 to transform plasmid pN_3-EGFP encoding GFP into HUVECs. The HUVEC containing pN_3-EGFP, named HUVEC-GFP, was screened and selected by antibiotic G418. Using in vitro transcription T7 kit, GFPsiRNA targeting GFP mRNA and control-siRNA used as control were synthesized. The siRNAs were transfected into HUVEC-GFP with oligofectamine. 48 h later, the expression levels of GFP protein and mRNA in HUVEC-GFP were determined. RESULTS: The HUVEC-GFP was screened to express GFP in the presence of G418. The agarose gel electrophoresis analysis showed that the siRNAs prepared were integrated. 48 h after transfection with siRNAs, compared to control group, the level of GFP fluorescence was obviously decreased in the HUVEC-GFP transfected with GFPsiRNA. The results of RT-PCR detection showed that GFP mRNA expression was obviously suppressed by GFPsiRNA at the rate of 40%, and no obvious suppression of GFP mRNA expression was found in the HUVEC-GFP transfected with control siRNA. CONCLUSION: The siRNA targeting GFP mRNA, synthesized in vitro, efficiently suppresses the GFP expression in HUVECs.

Objective To investigate whether microtubule disassembly plays an important role in the pathogenesis of the opening of mitochondria permeability transition pore (MPTP) in hypoxic cardiomyocytes and the decrease of its activity, resulting in its hypoxic injury. Methods Neonatal rat cardiomyocytes in primary culture were randomized as normoxia group (A), hypoxic group (B), normoxia treated with microtubule destabilizing agent (Colchicine) group (C), hypoxia treated with microtubule stabilizing agent (Taxol) group (D). At 0.5, 1, 3, 6, 12 h after treatment, polymeric tubulin was detected by immunofluorescence and Western blotting, mitochondria permeability transition pore (MPTP) open by coloading with calcein AM and cobalt chloride, and the activity of cells by measuring the mitochondrial-dependent reduction of MTT to formazan. Results Early microtubule disassembly, MPTP open and activity decrease of cardiomyocytes in both groups B and C were observed at 0.5 h after treatment. These phenomena all became more and more significant with the prolongation of treatment. However, microtubule disassembly, MPTP open and activity decrease of cardiomyocytes of group D were significantly lower than those of group B. Conclusion Microtubule disassembly happened at 0.5 h after hypoxic treatment. Microtubule stabling agent Taxol and destabilizing agent Colchicine can regulate microtubule integrity efficiently. The microtubule damage plays an important role in the hypoxic injury of cardiomyocytes.

Objective The chief aim of the present work is to investigate features of sternum of Chinese adults and to establish the sex determination method to evaluate its effect based on 3D recombinant morphology indicators. Methods Based on chest spiral CT scans, 2D images of multi-level recombination and 3D model of volume rendering, the experiment concludes an sex determination equation from 8 measurement indicators of the sternum and 3 ratio indicators. The 8 measurement indicators include full-length, handle length, body length, maximum width of the handle, maximum width of the body, maximum thickness of the handle, maximum thickness of the body, and thickness of the upper body. Results According to the 11 indicators of sex differences in statistics (P<0.05), especially indicators of the full-length, body length, maximum width of the handle and maximum thickness of the body, the body's sex is easier to be determined. All indicators equations, length indicators discriminant equations and stepwise discriminant equations have higher reliable rate (88.6%) which was consistent with the recent foreign research reports. Conclusion The method of sex determination based on multislice spiral CT 3D recombinant techniques is practicable and has an relatively high accuracy. It is expected to be applied to researches in age estimation by sternum and other virtual bones.

Objective:To evaluate the effect of mechanical chest compression device in patients with cardiac arrest.Methods:The relevant literatures about mechanical cardiopulmonary resuscitation and manual cardiopulmonary resuscitation were systematically searched from China Knowledge Network (CNKI), VIP, Wanfang, PubMed, Web of Science and other databases. The effective data were extracted and analyzed by RevMan5.3 software.Results:A total of 20 clinical studies involving 29 727 patients were included, of which 11 104 patients received mechanical cardiopulmonary resuscitation and 18 623 patients received traditional manual cardiopulmonary resuscitation. The results of meta-analysis showed that mechanical cardiopulmonary resuscitation could not effectively improve the restoration of spontaneous circulation (ROSC) rate, admission survival rate, discharge survival rate and neurological prognosis in patients with cardiac arrest compared with manual cardiopulmonary resuscitation. ROSC occurrence rate ( RR=1.10, 95% CI: 0.99-1.23, P<0.01), admission survival rate ( RR=1.01, 95% CI: 0.95-1.08, P=0.67), discharge survival rate ( RR=1.00, 95% CI: 0.86-1.15, P=0.14), and good neurological function rate ( RR=0.81, 95% CI: 0.61-1.06, P=0.69) showed no significant differences between the mechanical cardiopulmonary resuscitation and manual cardiopulmonary resuscitation. Conclusions:Mechanical chest compression device has no advantage compared with manual cardiopulmonary resuscitation. Mechanical cardiopulmonary resuscitation is not recommended to completely replace manual chest compression in cardiopulmonary resuscitation.

OBJECTIVETo investigate the impact of long-time and short-time blood pressure variability (BPV) on glomerular filtration rate (eGFR) in elderly population.

METHODSA total of 2 464 participants aged of ≥60 years old without history of stroke and coronary heart disease were selected with random sampling method from the individuals underwent health check up in Tangshan Kailuan Hospital, Kailuan Linxi Hospital, Kailuan Zhaogezhuang Hospital between 2006 and 2013. The study participants were asked to join a face-to-face interview every two years. Long-time BPV was defined as the standard deviation of all SBP values at the baseline visit and following visits, short-time BPV was defined as the standard deviation of day time blood pressure and night time blood pressure which was derived from 24 hours ambulatory blood pressure monitoring. Multivariate linear regression models were used to test the impact of long- and short-time BPV on eGFR.

RESULTSThe study included 3 participants groups including the long-time SBPV group (2 279 participants), the short-time SBPV group (1 636 participants) and the long- plus short-time SBPV group (1 632 participants). Participants were further sub grouped by median value (NO.1median value). eGFR in the long-time SBPV NO.1 and NO.2 group was 83.19 and 81.49 ml·min(-1)·1.73 m(-2) respectively, in the short time SBPV NO.1 and NO.2 group was 83.53 and 80.81ml·min(-1)·1.73 m(-2) of the day time, and was 83.20 and 81.14 ml·min(-1)·1.73 m(-2) of the night time, respectively. eGFR in the long- plus short-time SBPV NO.1 and NO.2 group was 83.21 and 81.08 ml·min(-1)·1.73 m(-2) of the long-time SBPV, and was 83.53 and 80.75 ml·min(-1)·1.73 m(-2) of the day time, and was 83.18 and 81.11 ml·min(-1)·1.73 m(-2) of the night time. Significant linear relationship was found between higher day time SBPV and lower eGFR (P<0.05). After adjusting for confounding parameters including age, sex, body mass index, 1 mmHg(1 mmHg=0.133 kPa) of day time SBPV increase was related 0.21 ml·min(-1)·1.73 m(-2) eGFR decrease (P<0.05).

CONCLUSIONThe higher day time SBPV is associated with reduced eGFR in the elderly population.Clinical Trail Registry Chinese Clinical Trial Registry, ChiCTR-TNC-11001489.