Objective To study the electrochemical features of an improved enzyme bioelectrode for biofuel cell. Methods The enzyme electrode was prepared via biotin-avidin technology and its electrochemical features were explored. The conditions such as layers of enzyme films, strength of glucose, scan speed and temperature, which affected the electrochemical behavior of enzyme electrode, were studied. Results The results showed that the electrode had good electric current response to glucose. The enzyme electrode prepared can fulfill the need of biofuel cell and is a promising electrode to be used in human body.

Objective To study the characteristics of maxillary growth after lip and palate repair. Methods Using X-ray cephalometry through 12 landmarks and 12 measured values we had compared the difference between 60 patients with operated cleft lip and palate and 20 normal persons. Results After the operation all patients appeared limits of maxillary growth in different degree and different way. SNA and N-A-Pg [(-4.8?6.31)mm, P 0.05] were smaller than normal in patients of cleft lip. SNA(74.5?4.01)?, P 0.05;(75.1?1.07)?, P 0.01], and N-ANS [(47.3?2.41)mm, P 0.01;(49.8? 1.91) mm, P 0.01] were also smaller than normal in cleft palate and cleft lip and palate. Conclusions The limits of maxillary growth are affected by congenital and operative factors. Lip repair will influence the length of maxilla, and palate repair will influence height and width of maxilla.

Objective:After construction and identification of HBsAg gene recombinant backbone adenoviral vector,it is to prouduct HBsAg gene recombinant adenoviruses by packing PAd-Easy-1-HBs in 293 cells.Methods:The gene of interest was amplified from plasmid pEcob-6 PCR, the gene of interest which contained HBsAg gene was cloned into on adenoviral shuttle vector pAd-track-cmv. The pAd-track-cmv-HBs was linearized by digesting with restriction endonuclease Pme-1, and subsequently cotransformed into E.coli BJ-5183 cells with an adenoviral backbone vector pAd-Easy-1, Homologous recombinants were performed in bacterial cells. Finally, the linearized backbone adenoviral vector was transfected into adenoviruses packing cells lines,e.g. 293 cell by lipofectamine transfection. Transfections and viral productions can be minotored by green fluorescent protein(GFP). The expression of HBsAg in supermatant was investigated by ELISA. It was a certain HBsAg vaccine to amplify recombinant adenoviruses by repeating the infevtion cell to collect the viral supermatant.Results:GFP expression was visible by fluorescence microscopy after transfection. Adenoviral titer was monitored by GFP expression. GFP expression was visible after repeating the infection cell using the viral supernatant in more than 90 percent of the cells.The HBsAg also expressed in supermatant.Conclusion:HBsAg gene recombinant adenoviral backbone vector has been constructed successfully. HBsAg gene recombinant adenoviruses have been producted by packing in 293 cells. The study provides the possibility of further researches on the development of new anti-HBV vaccines.

Objective To study the expressions of estrogen receptor(ER)and progesterone receptor(PR)in elderly patients with breast cancer,and the correlation between their expressions and clinicopathological characteristics.Methods The expressions of ER and PR in 110 elderly patients with breast cancer(over 60 years old)from 1995 to 2004 were detected,and their clinical and pathological features were analyzed retrospectively.Another 110 patients aging 30 to 59 years with breast cancer served as control.Results Breast cancer in aged and non-elderly group had similar pathohistological types,but the aged had more tumors with low-grade malignant types.ER and PR were found to be over-expressed in elderly patients but not in the control.No obvious correlation was seen with clinical pathological stages.The expression levels of ER and PR in 0-3 positive nodes group was higher than ≥4 positive nodes group.Conclusion Elderly patients and non-elderly patients have similar pathohistological types of breast cancer.The former have higher expressions of ER and PR,and their expressions are associated with axillary lymph node status.

[Objective] To investigate the therapeutic effect of Phyllanthus compound (PC, mainly composed of Herba Phyllanthus, Radix Astragali, Radix Notoginseng, Radix Glycyrrhizae, etc.) and lamivudine on chronic hepatitis B. [ Methods ] Sixty cases of chronic hepatitis B were randomized to two groups: group A (the combination of PC and lamivudine) and group B (lamivudine 100mg/d). After a six-month treatment, the therapeutic effect was evaluated. [Results] After treatment, symptoms and signs were improved in group A. The recovery rate of alanine aminotransferase (ALT) was 83.3% and 53.3%, the rate of hepatitis B E antigen (HBeAg) turning negative was 73.3% and 13.3% , the percentage of HBeAg ( - ) or anti-HBe ( + ) was 53.3% and 6.7% and HBV-DNA-turning-negative rate was 93.3% and 70.0% in groups A and B respectively (P

Objective To develop a measurement method for determination of optical parameters of a red blood cell ( RBC) suspension based on the measurement of spatial scattered light signals without using an integrating sphere.Methods Multiple independent photoelectric sensors and light intensity modulation were used to obtain the measured values of diffuse reflectance,diffuse transmittance and collimated transmittance.The measured data results were imported into a Monte Carlo simulation based RTE to inversely determine the absorption coefficient, scattering coefficient and anisotropy factor of the measured sample using a new perturbation method.Results The described measurement method was applied to determine the optical parameters of a polystyrene microsphere suspension with a mean diameter of 2.6μm,and the results were essen-tially consistent with the calculated optical parameters by Mie code.Then, the RBC suspension was used for testing optical parameters,and the results were basically consistent with the parameters in the literature.Conclusion The system based on the measurement of spatial scattered light signals without using an integrating sphere will provide a quick and accurate approach for quantitative analysis of free hemoglobins and RBC suspensions.

Objective: To observe the expression of urokinase-type plasminogen activator receptor (uPAR) in human tongue squamous cell carcinoma Tca 8113 cells at different dosages of heat shock. Methods:The expression of uPAR protein in Tca 8113 cells was examined using immunohistochemical technique (IH) and flow cytometry (FCM) after the cells had been treated at 37,40,43 or 45 ℃ for 40 min. Results:The fluorescent intensity of uPAR protein of Tca 8113 cells treated at 37,40,43 and 45 ℃ was 11.36?0.06,9.98?0.12, 10.37?0.05 and 11.31?0.10 respectively.Conclusion:Heat shock can reduce the expression of the uPAR protein of Tca 8113 cells.

OBJECTIVE This study was conducted to analyze the underlying bacterial pathogens of the tonsils and adenoids in children with sleep-disordered breathing(SDB).METHODS The core tissue from the tonsils and/or adenoids of 163 SDB children was cultured aerobically. Of the 163 cases, 120 children underwent adenoidectomy and tonsillectomy simultaneously(A+T), 39 children underwent adenoidectomy(A) and 4 tonsillectom(T) only. 124 children who underwent tonsillectomy were subdivided into two groups based on history(with or without a history of recurrent tonsillitis). 71 children with the history were enrolled in the 'recurrent tonsillitis group' and 53 children without the history were enrolled in 'non- recurrent tonsillitis group'.RESULTS Of the total 120 cases who underwent A+T, 114(95.00%) cases had same distribution of bacteria detected in both sides in the same patient. Besides this, 17 cases in whom mixed organisms were identified in both sites shared common pathogen. No significant difference in the detection rates of staphylococcus aureus and haemophilus influenzae were found when we compared seasons(Tonsil:χ2=8.538,P=0.201; Adenoid:χ2=5.427, P=0.490). No significant difference in the type and detection rate of essential bacteria was found when we compared between recurrent tonsillitis group and 'non-recurrent tonsillitis group' (χ2=3.028,P=0.387).CONCLUSION The bacterial isolates from the tonsils and adenoids are virtually identical in type and detection rate in the same SDB patient. The bacterial distribution of the tonsillar and adenoidal core is unaffected by the seasonal variation and history of recurrent tonsillitis.

An on-line solid phase extraction ( SPE ) coupled with HPLC-MS/MS method was developed to determine S-ammuxetine and R-ammuxetine in rat plasma. The sample preparation consisted of the following steps:A protein precipitation extraction used methanol and acetonitrile ( 50:50 , V/V ); an on-line SPE treatment to remove most matrixes in plasma;an enrichment and separation step used a C18 analytical column. S-and R-ammuxetine were determined by tandem mass spectrometry. The SPE column was a Retain PEP Javelin (10 mm × 2. 1 mm × 5 μm), while the chromatographic separation was achieved using a ZORBAX SB-C18 (50 mm × 2. 1 mm × 3. 5 μm) analytical column with an isocratic mobile phase composed of acetonitrile-water-formic acid (40:60:0. 1, V/V/V, 0. 3 mL/min). The selected reaction monitoring mode of the positive ion was performed and the precursor to the product ion transitions of m/z 292 . 1/154 . 0 and m/z 260. 4/116. 2 were used to measure S-ammuxetine, R-ammuxetine and internal standard (propranolol). The method was linear over a concentration range from 0 . 2 to 1000 μg/L with the correlation coefficients of 0 . 9903 and 0 . 9951 . The average intra-day precision values were 1 . 2% -12 . 0% for S-ammuxetine and 0. 4%-11. 2% for R-ammuxetine, respectively. The average recoveries were 94. 2%-101. 6% for S-ammuxetine and 94. 3% -109. 4% for R-ammuxetine. Compared to the literature, the sensitivity of this method increased dramatically. The present method has been successfully applied to the preclinical rat research of ammuxetine isomers following intragastric administration.

Objective To investigate the expression of elongation of very long-chain fatty acids family member 6 (ELOVL6) in high-grade serous ovarian carcinoma (HSOC), and explore the correlation between its expression and clinical prognosis in these patients. Methods The expression of ELOVL6 at mRNA and protein levels were respectively detected by reverse transcription (RT)-PCR and immune histochemistry method in 12 cases with normal ovarian tissues and 172 cases with HSOC from primary tumor site, forty of which had paired peritoneal metastatic tissues. Results (1) The results tested by RT-PCR showed that ELOVL6 expression in normal ovarian tissue was 4.8±1.1, while 1.2±0.7 in primary tumors and 1.8 ± 0.9 peritoneal metastatic sites in HSOC. Compared with normal ovarian tissue, the level of ELOVL6 mRNA was significantly lower in HSOC (P<0.05). There was no significant difference between primary and peritoneal metastatic sites in HSOC (P=0.610). It was shown that ELOVL6 protein localized in cytoplasm of ovarian cancer cell by immunostaining assay. (2) ELOVL6 expression was observed in all normal ovarian tissue, 70.2%of G1-G2 and 48.8%of G3 HSOC (P<0.05). ELOVL6 expression in drug-resistant group were significantly lower than that in non-resistant group (39.1% vs 65.0%, P<0.01). The median disease-free survival was 41 months in the ELOVL6-positive group and 39 months in ELOVL6-negative group (P>0.05). The total median survival was 52 months in ELOVL6-positive group and 44 months in ELOVL6-negative group (P>0.05). Conclusion Low expression of ELOVL6 may correlate with the poor differentiation and drug resistance in HSOC.