In order to compare the characteristics of ethano l production, a serie s respiratory deficient mutants (rho -) of Saccharomyces cerevisiae and the ir wil d parent strain (rho +) were assayed for ethanol yield, ethanol fermentation ki netics, ethanol tolerance, and activities of ethanol-dehydrogenase. The data i nd icated that: Though the average amount of ethanol produced by mutants rho - a nd by wild rho + strains were similar, some mutants produced a little more amount of ethanol than wild type. The kinetics curve of ethanol fermentation suggested t h at rho - mutants had a little higher ethanol fermenting speeds than wild type . Th e activity of ethanol-dehydrogenase per unit weight of protein of rho - mutan ts c ells were higher than that of wild strain rho +; the activity of ethanol-dehyd rogenase per unit volume of fermentation medium of rho + were higher than that rho - mutants,mainly due to the higher biomass of rho + were higher than that of rho - mutan ts. Some rho - mutants could tolerate higher ethanol concentration than wild rh o + stra in, but some not. If higher ethanol tolerance and higher ethanol yield rho - mu tants were used in fermenting process,higher ethanol yield would be expected,but some problems such as that rho - mutants grew slowly should be considered.

Objective To investigate the effect of Zhibaidihuangwan combined with clindamycin hydrochloride on serum IL-8, TNF-α, IL-10 levels in periodontitis and its clinical efficacy.Methods A total of 98 patients with periodontitis from our hospital were collected and randomly divided into the control group and the experimental group, 49 cases each group.Patients in the control group were treated on the basis of the foundation therapy with clindamycin hydrochloride, patients in the experimental group were treated with Zhibaidihuangwan on the basis of control group .The periodontal pocket depth, plaque index, gingival index and positive rate of probe bleeding, serum IL-8, TNF-a, IL-10 levels were measured, and the clinical efficacy were compared.Results The effective rate of the experimental group(93.88%) was higher than the control group(79.59%), with statistical significance (P<0.05).The positive rate of probe bleeding in experimental group (38.78%) was lower than control group of two groups(59.18%), with statistical significance (P<0.05).The periodontal pocket depth, plaque index, gingival index in experimental group were lower than the control group after treatment, the TNF-αand IL-8 levels in experimental group were lower than the control group, IL-10 was higher than the control group after treatment, with statistical significance (P<0.05).Conclusion Zhibaidihuangwan combined with clindamycin hydrochloride could reduce periodontitis serum IL-8 and TNF-αlevels, improve the level of IL-10.

[Objective]To analyze the change of intervertebral disc Von Mises stress on the adjacent segment after "U" shape dynamic fixation for lumbar with finite element method. [Method]The three-dimensional finite element models of the lumbar dynamic fixation and rigid fixation were established by using Mimics11.11 and Abaqus6.51 softwares.Loads used in this study were axial compressive,flexion,extension,lateral bending,and rotation forces.The intervertebral disc Von Mises stress of the adjacent segment was analyzed and compared.[Result]In the same shearing load of 500 N,the intervertebral disc Von Mises stress of the adjacent segment in the dynamic fixation model was lower than rigid fixation model under axial compressive,flexion,extension,lateral bending,and rotation forces,especially at lateral of the intervertebral disc,and there were significant difference between dynamic fixation group and rigid fixation group(P

OBJECTIVE: To study the changes in physiological indices reflecting resistance to environmental stress and volatile constituents of Lysimachia nummularia Aurea. METHODS: Different concentrations (150, 200, 250 and 300 mmol · L-1) of NaCl solution was used to treat young Lysimachia nummularia Aurea to investigate the effect of saline stress on the seedling growth. The changes of physiological indices including soluble sugars, proline, SOD and so on were assayed. Volatile constituents were analyzed by head space solid-phase microextration (HS-SPME) coupled with gas chromatography-mass spectrometry (GC/MS). RESULTS: With increasing stress intensity, the contents of soluble proteins declined, those of soluble sugars increased gradually, the content of proline reached the maximum value when saline stress intensity was 250 mmol · L-1, and the contents of chlorophyll a and b decreased firstly and rose later above 250 mmol · L-1. MDA content and SOD activity rose gradually under saline stress with increasing stress intensity. POD activity was significantly lower under the saline stress than the control group. CAT activity rose firstly and rapidly declined later. The volatile constituents of L. nummularia fluctuated after saline stress. CONCLUSION: L. nummularia has relatively higher saline resistance by means of active accumulating osmoregulation substances such as soluble sugars, soluble proteins and enhancing capability of antioxidase.

Objective To evaluate the clinical efficacy of percutaneous transhepatic biliary drainage (PTBD) and pcrcutaneous transhcpatic insertion of biliary stent (PTIBS) for malignant biliary obstruction.Methods PTBD or PTIBS were performed in 56 patients with malignant biliary obstruction, which were aused by hepatic carcinoma (n = 14), biliary duct carcinoma (n = 11), gallbladder carcinoma (n = 5),stomach carcinoma accompanied with metastasis of lymph node (n = 14), carcinoma of ampulla (n = 1 ) or carcinoma of pancreatic head (n = 11 ). The diagnosis was confirmed by ultrasonography, CT or MRI in all patients. The obstructed site was well identified, including high obstruction in 19 patients and lower obstruction in 37 patients. Based on the imaging findings, suitable interventional procedure was employed.Results PTBD or PTIBS were performed successfully in all 56 patients, of them PTBD was adopted in 11,PTIBS in 40 and both PTBD and PTIBS in 5. The serum total bilirubin decreased from (295.65±152.86)μmol/L before the procedure to (151.05 ± 107.36) μmol/L after the procedure, (P < 0.01 ). Postoperative infection could affect the fading of jaundice (P < 0.01 ), but the location of the obstruction carried no relationship with the fading of jaundice (P = 0.063). Conclusion Both PTBD and PTIBS are safe and effective palliative therapies for malignant biliary obstruction, which can markedly relieve patient of jaundice,improve the quality of life and elongate the survival period.

Objective To evaluate the clinical features,therapies and prognosis in patients with mucosa-assoeiated lymphoid tissue (MALT) lymphoma in ocular adnexal marginal zone (OAML).Methods A retrospective analysis was made upon clinical data from 21 patients with OAML admitted into Beijing Tongren Hospital from June,2008 to December,2011.Results There were 12 (57.1 ％) men and 9(42.9％) women,with a median age of 57 (23-79) years old.Majority of patients had localized pathological changes.Among them,16 patients (76.2％) were in stage Ⅰ E,and 5 (23.8％) in stage Ⅳ E.Surgical resection as the sole treatment was performed in 13 patients (61.9％),and positron emission tomography CT(PET-CT) imaging demonstrated normal fluorine 18-fluorodeoxyglucose (FDG) uptake after surgical resection,who were managed with no further therapy.All the 13 patients were followed up for median 14 (5-38) months,and all in complete remission.Combination chemotherapy was given to 8(38.1％) patients.Three patients in stage Ⅰ E treated with COP (cyclophosphamide,vineristine and prednisone) or CHOP (cyclophosphamide,adriamycin,vincristine and prednisone) were all in partial remission.Five patients in stage ⅣE were treated with COP/CHOP in combination with rituximab,and all in complete remission.The 3-year overall survival rate and disease-free survival rate in the total patients were 100.0％ and 74.9％ respectively.Conclusions The patients with OAML generally have localized disease,show indolent clinical course,and present low lymphoma-related mortality.Surgical resection is a very important treatment in the patients with local disease.Systemic chemotherapy should be considered in patients at advanced stages.Rituximab in combination with chemotherapy can improve the remission rate.

Objective To discuss X-ray signs of cervica spondylosis.Methods Complete information on 327 cases of cervical spondylosis was analyzed retrospectively.Results These were 245 cases of vertebral spur,accounting for 75％ ;210 cases of cervical curve changes,accounting for 62％ ; 154 cases of disc stenosis,accounting for 47 ％ ; 137 cases of forainal stenosis stenosis,accounting for 42％ ;135 case of luschka j iont degeneration,accounting for41％ ;124 cases of neck ligament calcification,accounting for 38％.Conclusion Vertebral bone spur,luschka jiont degeneration and disc and foraminal stenosis were important signs of cervical spondylosis.X-ray diagnosis of cervical spondylosis had an important value.

Purpose To investigate the distribution of polymorphisms of quinone oxidoreductase 1 (NQO1) C609T gene in breast cancer patients, and to analyze the relationship with breast cancer molecular subtype. Methods Genotyping of C609T rs1800566 lo-cus of NQO1 gene in peripheral blood of 248 cases of female breast cancer were detected using high-throughput TaqMan MGB real-time fluorescence quantitative PCR technology, while the detection of ER, PR, HER-2 and Ki-67 in cancerous tissues were used with immu-nohistochemical staining and FISH gene amplification. Results Among 248 cases of breast cancer patients, CC genotype accounted for 27. 42% (68/248), CT genotype accounted for 49. 60% (123/248), TT genotype accounted for 22. 98% (57/248), which con-sistent with Hardy-Weinberg equilibrium law genetic (P>0. 05). 5 cases of HER-2 (++) who did not undergo FISH testing were re-moved, all the rest were done with FISH detection. Luminal A type accounted for 15. 2% (37/243), Luminal B type accounted for 51. 4% (125/243), HER-2 overexpression type accounted for 19. 8% (48/243), basal cell type accounted for 13. 6% (33/243). Compared with patients carrying the CC genotype, ER and PR positive rates in breast cancer patients carrying CT and TT genotype was significantly higher (P<0. 05), while there was no statistically difference on the expression of HER-2 and Ki-67 proteins in two groups (P>0. 05). There was no statistically difference on distribution of C609T polymorphism of NQO1 gene among different molecular sub-types of breast cancer (P>0. 05). Conclusions Here is no relationship between C609T polymorphism of NQO1 gene and breast cancer molecular subtype, miss rate of NQO1 ( CT+TT) in basal cell carcinoma is lower, and its gene polymorphism may provide the reasonable explanation to the heterogeneity of breast cancer molecular subtype.

Objective To isolate and cultivate mouse hepatic progenitor cells (mHPCs) from E14.5 mouse fetal liver in vitro and induce mHPCs differentiation into cholangiocytes.Methods Isolation of mHPCs from mouse fetal liver was based on the cell surface antigen delta-like protein 1/preadipocyte factor 1 (Dlk/Pref-1) by a fluorescence-activated cell sorter (FACS).Then mHPCs isolated were co-cultured with/without mouse embryonic fibroblasts (MEFs) by using Transwell.The cell antigen alpha-fetoprotein (AFP), albumin (ALB) and cytokeratin19 (CK19) expression in freshly isolated DLK1+cells or co-cultured for 4 days and 6 days were observed with immunocytochemical method.Results When co-cultured with MEFs, the division and proliferation were observed in most of DLK1+ cells and grape-like aggregation was formed.Cells began to adhere to growth and began to become spindle-shaped on 4th day.The DLK1+cells isolated freshly by FACS were expressed AFP and low levels of ALB but not expressed CK19.But, these cells expressed CK 19 and weak expression of ALB on 4th day.In addition, the expression of CK19 increased and the expression of ALB almost not detected on 6th day.Conclusions Most of DLK1+ cells, isolated from E14.5 fetal livers by FACS, are proved to be mHPCs.Furthermore, these cells can proliferate quickly and differentiate into cholangiocytes by co-culture with MEFs.

Objective:To evaluate the effect and safety of rifabutin combined with multi-drugs in the treatment of multi-drug resist-ant tuberculosis with long-term therapy. Methods:Totally 86 cases of patients with multi-drug resistant tuberculosis were divided into the control group and the treatment group with 43 ones in each according to a random number table method. The two groups were trea-ted with levofloxacin, pasiniazid, ethambutol, protionamide and amikacin etc. The control group was treated with rifapentine, and the treatment group was treated with rifabutin additionally. After 18-month treatment, the negative conversion ratio of sputum smear and sputum mycobacterium tuberculosis culture, lesion absorption rate and cavity closure rate of X-ray chest radiograph and adverse reac-tions in the two groups were compared. Results:The negative conversion ratio of sputum smear and sputum mycobacterium tuberculosis culture in the treatment group was 41. 86% and 32. 56%, respectively, which were similar with those in the control group ( P >0. 05). There were no significant differences in lesion absorption rate and cavity closure rate of X-ray chest radiograph and adverse re-actions between the two groups (P>0. 05). Conclusion:Rifapentine or rifabutin combined with multi-drugs in the treatment of multi-drug resistant tuberculosis can improve the negative conversion rate of sputum mycobacterium and lesion absorption and cavity closure with high safety.