Objective To explore the current situation of knowledge,attitude and behavior of smoking among the college student.Methods 1855 subjects,who were randomly chosen from colleges,were investigated with the questionnaire and analyzed the recognition and behavior of smoking.Results 1700 valid questionnaire were reclaimed.(effective rate 91.6%).The awareness of harmful components in the cigarette,such as nicotine,Tar cigarettes,had no difference among different grades (P＞0.05),but the recognition about the nitrogen oxides,carbon monoxide and radioactivity in higher grades was higher than that of lowers(P＜0.01,).The rate of smoking was 21.1% in total,there was no significant difference among different grades (P＞0.05).Conclusion Although the level of awareness about the harmful components in the cigarette and its harmness to health was different among different grades.Health education should be enforced in college students.

Objective To establish practical cell model of HCV infection, and investigate the susceptibility of a human liver cell line HepG2 to hepatitis C virus in vitro. Methods A human liver cell line HepG2 was incubated with serum from a chronic hepatitis C patient for 6～8 hours. Both the plus and minus strands of HCV RNA in infected cells or supernatant were examined by reverse transcription polymerase chain reaction (RT PCR). The HCV NS 3,NS 5 antigens in infected cells were respectively detected with the monoclonal antibodies to antigens of their own by immunohistochemical assay. The minus strand of HCV RNA in infected cells were localized by in situ hybridization. Results The intracellular plus or minus stands of HCV RNA were first detected on day 3 post incubation and then could be intermittently detected until day 35 post incubation in cells or supernatant. The positive signals of NS 3,NS 5 antigens could be expressed within cytoplasm of infected cells. The minus strand of HCV RNA was located within cytoplasm by in situ hybridization. Conclustions These results show that a human liver cell line HepG2 is not only susceptible to HCV but also able to support its long time replication in vitro.

Ambulatory blood pressure monitor (ABPM) was done on 103 hypertensive patients according to clinical stages and left ventricular measure (LVM) was randomly done on a portion of the patients. The results showed that the variability of stage-Ⅱ-group's 24 hour systolic pressure and stage-Ⅲ-group's systolic and diastolic pressures was significantly higher than that of stage-Ⅰ-group (P

Objective To investigate the auditory condition in adults with hearing-impairment and evaluate the outcome of the hearing aid. Methods The threshold of air-bone-conduction audiometry and binaural hearing aid in 91 adults were determined with pure tone audiometry,and their satisfaction to hearing aids were investigated with free interview. Results The threshold of hearing and hearing aid were positively correlated. The satisfaction did not significantly correlate with the threshold of hearing aid, but with the time of deprivation of hearing. The hearing threshold classification was better in the patients with the audiogram of flat, raising, slow down type than with audiogram of Shu type, which defined as hearing reacted only in 1 or 2 frequency. Conclusion It is important to improve the primary otology protection, as well as the rehabilitation from the hearing aids.

Rheumatoid arthritis (RA) is a chronic aseptic inflammatory disease characterised by synovial inflammation leading to progressive joint involvement with joint swelling,tenderness,and functional impairment.After therapeutics,some patients still have persistent synovitis and structural damage while they are in clinical remission.Musculoskeletal ultrasonography (MSUS) is playing a more important role in diagnose,therapy monitoring and prognosis of RA in the case of its character-non-invasive,easy to accept,cost-effective,and repeatable examination in the short term,especially multiangle of all aspects in the interesting area.Application of grey scale ultrasonography,power doppler ultrasonography,CEUS in RA clinical remission and evaluation on the therapeutic effect and prognosis were reviewed in this article.

Objectives:To explore the relationship between sleep quality and coping styles in cervical cancer patients undergoing radiotherapy.Methods:68 cervical cancer patients were assessed by convenient sampling,who had been investigated with Pittsburgh Sleep Quality Index (PSQI) and Jalowiec coping scale (JCS-60).Results:Global PSQI score was (8.60 ± 4.47).Optimistic coping scored highest with score of (2.11 ± 0.45),which was the style most often applied by cervical cancer patients.Emotive coping scored lowest with score of (0.97 ± 0.62).Among 60 coping items,Hoped that things would get better was the most often used coping strategy,Took a drink to make yourself feel better was the least used coping strategy.Global PSQI score was positively correlated with fatalistic coping(r =0.325,P =0.008).Confrontive coping was positively correlated with subjective sleep quality score(r =0.318,P =0.009),while supportive coping was negatively related to subjective sleep quality score(r =-0.306,P =0.013),and palliative was negatively related to daytime dysfunction(r =-0.245,P =0.047).Gonclusions:Sleep problems are a common complaint in cervical cancer patients undergoing radiotherapy.Health care workers should guide the patients to adopt active coping styles to improve sleep quality.

The aim of the present study was to evaluate the effect of storage conditions,pretreatment,temperature,time and excystation solutions on in vitro excystation of Cryptosporidium oocyst.Cryptosporidium andersoni oocyst was used as a model and the results showed that 0.5% sodium hypochlorite could enhance the excystation rates.But there was no significant difference compared with oocysts untreated by sodium hypochlorite(P＞0.05).0.75% synthetic sodium taurocholate and 1% bile solution could urge the excystation of oocysts,which were significantly different compared with the excystation rate of oocysts in 0.25% trypsin solution or in PBS(P<0.05).The excystation rates of oocysts in acidic water (pH =3) were similar with the rates in PBS (pH =7.2) but significantly different from the rates in alkaline water (pH =9) (P<0.01).Additionally,the excystation rate of oocysts in water of 24℃ was significantly lower than in water of 37℃(P<0.01),and the excystation rate of oocysts raised gradually at 37℃ with the passage of time.It's concluded that temperature,acidity and excystation solution were vital factors for the in vitro excystation of Cryptosporidium oocyst.A higher excystation rate could be observed when oocysts were pretreated with 0.5% sodium hypochlorite and treated with 0.75% synthetic sodium taurocholate at 37℃ for 3 hours.

OBJECTIVETo clone differentially expressed cDNA sequences involved in malignant transformation induced by benzo(a)pyrene metabolite dihydroxyepoxy benzo pyrene (BPDE).

METHODThe malignant transformation of human bronchial epithelial cell line 16HBE induced by BPDE in vitro was used as a model for comparing gene expression between the transformed cells and controls. cDNA representational difference analysis (cDNA-RDA) was performed to isolate differentially expressed cDNA fragment in transformed cells. The cDNA fragments were ligated to pGEM-T vector and transformed into JM109 bacteria. The plasmid DNA were sequenced and compared with data in GenBank by BLASTN.

RESULTSFive cDNA sequences were found to be novel ones and were registered in dbest database, which assigned accession numbers in GenBank are BG354691, BG354692, BG354693, BG354694 and BG354695, respectively. Eight of the remaining cDNA sequences showed sequence homology to those previously reported such as ribosomal protein S23, MLN137, ACTN4, transforming growth factor and G protein gene.

CONCLUSIONSThese 13 genes may be involved in BPDE-induced malignant transformation, but their biological characteristics and functions are left to further studies.

Benzopyrenes ; metabolism ; pharmacology ; Carcinogens ; pharmacology ; Cell Transformation, Neoplastic ; chemically induced ; genetics ; Cells, Cultured ; Cloning, Molecular ; DNA, Complementary ; analysis ; drug effects ; DNA, Neoplasm ; analysis ; Gene Expression ; drug effects ; Humans

OBJECTIVETo study the gene mutation and streptomycin, isoniazid or rifampicin resistance of Mycobacterium isolated from silico-tuberculosis patient's sputum so as to find a more effective therapy for this disease.

METHODSMycobacteria tuberculosis were separated from 96 coal worker with silico-tuberculosis firstly. Then rpsL, KatG and rpoB fragments of genome were copied with PCR and compared their SSCP profiles with standard strains.

RESULTS67 strains of streptomycin, isoniazid or rifampicin resistant Mycobacteria tuberculosis were found in routine drug resistance test, with the percentages of 80.5% (54/67), 58.2% (39/67) respectively. PCR-SSCP showed that out of 67 drug-resistant strains, 66(98.5%) of rpsL, 47(70.1%) of rpoB and 42(62.7%) of KatG appeared abnormal.

CONCLUSIONMost of the resistant strains appeared gene mutation. The mution rates were higher than the results from routine drug resistance test.

Coal ; Drug Resistance, Bacterial ; Humans ; Mutation ; Mycobacterium tuberculosis ; drug effects ; genetics ; Polymerase Chain Reaction ; Polymorphism, Single-Stranded Conformational ; Silicotuberculosis ; microbiology ; Sputum ; microbiology