Gene mutation of Candida albicans is one of the main causes for azole drug resistance. Different types of variation play different roles in promoting the process of drug resistance. ERG series of gene mutations primarily affect the ergosterol synthesis pathway. When the regulatory factors TAC1 for CDR1 gene and Mrr1 for MDR1 gene generate mutations, the expression level of drug efflux pump protein in Candida albicans may be changed. In addition, gene copy number variation is also gaining attention. Therefore, the research of mutation resistance-associated genes has a positive meaning to explore the mechanism of drug resistance in Candida albicans.

Objective To predict the spatial distribution of Himalayan marmot using geographic information system (GIS) and Genetic Algorithm for Rule-set Production (GARP) model based on the monitoring data of Himalayan marmot in Qinghai Province.Methods Based on the data of routine monitoring and field survey by Global Position System (GPS) of Himalayan marmot,the position data was processed by spatial mapping using ArcGIS software.Ecological environment variables related to Himalayan marmot including terrain,slope,temperature,precipitation,vegetation,land use and other related variables were extracted and analyzed.The prediction model of Himalayan marmot distribution was constructed based on GARP model and ArcGIS software,and the spatial distribution mapping and analysis were carried out.Results Totally 198 points of Himalayan marmot were obtained by combining the recovery position with GPS information.The average model error of omission was 1.998 through the GARP modeling,while the optimal 100 model were highly statistically significant (all x2 ＞ 163.03,all P ＜ 0.01).The spatial distribution of predicted probability was divided into three grades including less than ＜ 40％,40％-＜ 80％ and 80％-100％ using ArcGIS,and the area with the prediction probability of 80％-100％ was the most suitable distribution area of Himalayan marmot.Conclusions The spatial distribution of plague host animal is predicted successfully using GIS and GARP ecological niche model.The result is more accurate compared to the statistic area by administrative region,which can provide important reference for plague prevention and control.

BACKGROUND: As dental implants, pure titanium and Ti-6Al-4V has achieved broad clinical applications, but they also contain toxic vanadium and aluminum element. Moreover, their elastic modulus is so high as to produce stress shield. OBJECTIVE: To examine the micro-hardness and elastic modulus of the self-made Ti-30Nb-8Zr-2Mo titanium alloy. DESIGN, TIME AND SETTING: An observational experiment was performed at the laboratory of College of Material Science and Engineering at Hebei University of Technology between March 2003 and February 2006. MATERIALS: Titanium alloy was prepared using titanium sponge (≥ 99% purify), niobium strip (≥ 99.9% purify), molybdenum powder (≥ 99% purify) and zirconium sponge (≥ 99.4% purify).METHODS: The micro-hardness of the specimens was determined after uniformly annealing, hot-forging and solution. Compression test was conducted on post-aging samples. MAIN OUTCOME MEASURES: Hardness and stress-strain curve.RESULTS: The maximal alloy strength was obtained after solution under 800 ℃ for 0.5 hours. Post-aging alloy's hardness was improved significantly although little change occurred on solution alloy. Compressive strength of alloy samples was 1 054 MPa, while elastic modulus reached 16.5 GPa. CONCLUSION: Both micro-hardness and elastic modulus of the self-made Ti-30Nb-8Zr-2Mo titanium alloy have satisfied performance requirements for dental implant materials.

Objective To describe MR findings in inflammatory myofibroblastic tumor(IMT)of the soft tissue.Methods MR manifestations of 11 cases of IMT of the soft tissue were retrospectively analyzed,and the MR findings were correlated with surgical and histological results.Results The pathological classification of the tumors was type Ⅰ in 1 case,type Ⅱ in 4 cases.mainly type Ⅱ admixed with type Ⅰ in 3 cases,and mainly type Ⅱ admixed with type Ⅲ in 3 cases.In 4 cases with primary tumor,the tumors were spheroid in shape,with well-defined margin and pseudocapsule.In 2 cases with primary axillary tumor and 5 cases with recurrent tumor,the tumors were irregular in shape,with ill-defined margin and invasion of adjacent structures.The tumors were mainly isointensive in T1-weighted images.Tumors of different pathological classifications had different signal intensities in T2-weighted images:1 case of type Ⅰ tumor was bright:4 cases of type Ⅱ tumor and 3 cases of type Ⅱ tumor admixed with type Ⅰ tumor were slig}ltly bright;3 cases of type Ⅱ tumor admixed with type Ⅲ were isointense or slightly hypointense in signal.All of the 11 eases in the study exhibited"pitaya cross-section sign"in T2-weighted sequence,which referred to discrete punctuate foci of relatively hypointensity in the background of hyperintensity,slightly hypointensity or isointensity.All of the 11 cases exhibited inhomogeneously significant enhancement after gadolinium administration.In the follow-up of the 6 cases of primary tumor,4 cases had recurrence,1 case had no recurrence,and 1 ease was lost in the follow-up process.In the follow-up of the 5 cases of recurrent tumor,4 cases showed recurrence again,and 3 cases were lost in the follow-up process.Conclusions The IMT of the soft tissue has characteristic MR features.The signal intensity of the tumor on T2-weighted sequence could reflect the pathological type of the tumor to some extent."pitaya cross-section sign"could be a pathogenomic sign of the IMT of the soft tissue.

Aim To investigate the role of captopril in insulin resistance of endothelial cells induced by high glucose.Methods 1 .Improvement effect of captopril on insulin resistance in HUVECs was observed.The HUVECs were seeded in a 6-well plate and were ran-domly divided into 5 groups,namely,control group, IR group,IR together with different Cap concentrations (low,medium and high concentration),respectively. 2.Improvement effect of Cap on insulin resistance was mediated by PPARγin HUVECs.HUVECs were ran-domly divided into 6 groups,namely,control group, control +PPARγinhibitor (PI)(1 .0 μmol · L -1 ) group,IR group,IR +PI(1 .0 μmol·L -1 )group,IR +Cap(1 ×1 0 -5 mol·L -1 ) group,and IR +Cap +PI (1 .0 μmol·L -1 )group.All indicators were detected. Results After HUVECs were incubated with media containing 33 mmol·L -1 of glucose for 48 h,the NO levels were significantly decreased while ET-1 levels were significantly elevated,showing a significant differ-ence between IR group and control group (P <0.01 ). The expression levels of PPARγmRNA and its protein were somewhat up-regulated,but there was no signifi-cant difference between IR group and control group (P>0.05).When the HUVECs in IR group were treated with DMEM containing glucose (33 mmol·L -1 )for 48 h and insulin for 30 min,the expression levels of PPARγmRNA and its protein in Cap groups were simi-lar to those in the IR group,and there was no signifi-cant difference between the two groups (P >0.05 );however, the expression levels of phosphorylated PPARγprotein in Cap groups were increased compared with IR group (P <0.05).The levels of NO were sig-nificantly increased whereas the levels of ET-1 were decreased in Cap groups,which had significant differ-ences compared with IR group (P <0.05).Nonethe-less,pre-treating with GW9662,a PPARγinhibitor, the improvement effects of Cap were markedly abol-ished.Conclusions Captopril could improve high glucose-induced insulin resistance of endothelial cells mediated by PPARγ,and the underlying mechanisms are related to the activation of PPARγ,rather than its expression.

Objective To investigate the prevalence and the related factors of allergic rhinitis in Xinjiang College students.Methods Five universities'students in Urumqi were chosen as the research subjects,the question-naire survey was conducted by the method of cluster sampling,and the results were analyzed.Results 1 609 ques-tionnaires were valid from 2 000 questionnaires.The prevalence rate of allergic rhinitis was 36.8% in the five univer-sities in Urumqi.Prevalence rate increased with grade.The prevalence rates of drinking,regular cleaning nasal cavity, scrubbing their nose in allergic rhinitis were 43.2%,40.7%,53.8% respectively,which were higher than those in not drinking,not regular cleaning nasal cavity,not scrub nose,the differences were statistically significant (χ2 =6.945,9.679,100.845,all P <0.05 ).There was no significant differences in the prevalence of allergic rhinitis among college students and gender,nationality and BMI(all P >0.05).Conclusion Allergic rhinitis not only closely related to the grades and the environmental factors,but also has some connections with living habits(drink,clean nasal cavity and scrub noses).

Objective To investigate and explore the awareness and willingness of breast cancer screening between Han and Mongolian women in Ordos, Inner Mongolia Autonomous Region, and to analyze the influence factors. Methods The patients answered investigation questionnaires face to face, and the content of questionnaire included demographic information, breast cancer awareness and relevant affecting factors on the awareness and willingness. Results 11162 (88.2 %) Han women and 1495 (11.8 %) Mongolian women were enrolled in the survey, with the average age of (45.4 ±7.1) years old and (45.4 ±6.8) years old. The education level (high school and above) of Han women was lower than that of Mongolian women [4456 women (40.0%) vs. 750 women (50.2%), χ2= 57.041, P< 0.001]. The Main way to delivery information on breast cancer screening in Han and Mongolian women was from their family members or friends [5002 women (44.9%) vs. 688 women (46.1%),χ2=40.699, P<0.001]. The proportions of never attending screening in the Han and Mongolian women were 41.7 % (4640 women) and 45.9 % (683 women), respectively (χ2=14.075, P=0.001). The breast self-examination rate of Han women were higher than that of Mongolian [71.1 % (7926 women) vs. 58.5 % (872 women), χ2= 98.466, P< 0.001]. According to logistics regression analysis, the cognitive level of women with high education level and breast disease history was higher (all P<0.001). Conclusions The cognitive level of breast cancer screening in Han women is better than that in the Mongolian, however, the overall level are low. It is necessary to strengthen the propaganda and education, and to encourage women to actively participate in breast cancer screening.

Objective To demonstrate the feasibility of DTI in human calf with body phased-array coil and surface coil of spine as receiving coil on 3 T system, and to optimize the parameters of sequence, including slice thickness and b-value. Methods Fifteen healthy volunteers were recruited in this study and randomly divided into three groups. The DTI sequence for head was performed on calf in the first group (5 cases), and the sequence parameters were optimized based on the deficits of the raw and the post-processed DTI images. Then, different slice thickness were applied in the senond group (5 eases) to optimize the slice thickness, and this optimized parameter with the highest score based on quality of the post-processed DTI images was applied in the next step. Finally, different b values were applied in the last group to optimize this parameters. The b value with the highest score based on the quality of the pest-processed was the proper one. Results Three problems existed in the raw and the pest-processed images, when the DTI sequence for brain was used for the calf. First, the SNR of raw images is extremely low. Second, the muscle were unclear on the image with parts of signal lose, especially in the anterior tibialis muscle. Finally, the artifacts due to chemical shift and ghost are quite serious. The scores for muscle display quality with slice thickness of 4 mm , 5 mm and 6 mm were (7.0±0. 0), (8.6±0. 9) and (9.0±0. 0) score respectively, the signal less scores were (5.0±0. 0) and ( 12. 8±2. 6) and ( 13. 8±2. 2) score respectively, and the general score were (22. 0±0. 0) and (30. 1±3.8) and (31.0±4. 1 ) score respectively. The differences of above scores were significant among different slice thickness (F-value were 21. 000 and 30. 544 and 12. 390 respectively, P <0. 05 ). The muscle displaying quality, signal loss and general scores were lowest in group with 4 mm slice thickness (q-value were 4. 896.6. 120,6. 327,7. 138,3. 863 and 4. 043, P < 0. 05 ) o The scores of muscle display quality, signal loss and general for b =400 s/mm2 were (9. 0±0. 0), ( 14. 0± 2. 2 ) and ( 33.0±2. 2 ) score respectively, which were lower than those with b = 800 s/ram2 [(7.0±0.0), (6.2±2.2), (21.8±3.4) score] and b=1000 s/mm2[(7.0±0.0), (5.0±0.0), (20.6±2.2) score] (q-value were 3.873,3.873,6.650,7.672,7. 101 and 5.917, P <0.05)o The scores of muscle displaying quality, signal loss and general for b =600 s/mm2 were (8.2±1.1 ), ( 13.0± 2. 3) and ( 30. 8±3. 8 ) score respectively, which were higher than those with b = 800 s/mm2 and b= 1000 s/nun2 (q-value were 3.873, 3.873, 5.797, 6.820, 5.326 and 5.917, P <0.05).There is no significant difference between b = 600 s/ram2 and 400 s/ram2 ( q-value were 2. 582 and 0. 852 and 1. 775, P > 0. 05 ). Conclusion Our preliminary findings indicate that it is feasible to perform DTI on human calf with 3 T MR. With body phased-array coil and surface coil of spine as receiving coil, the DTI sequence were optimized to acquire enough SNB with slice thickness of 5 mm and b-value of 400 s/mm2.

Objective To test the clinical validity of use of the Chinese version of Munro adult pressure ulcer risk-assessment scales (Munro scales),Braden scales,Qian Weiming operation pressure ulcer risk-assessment scales (self-designed scales) in the patients with general anesthesia surgery.Methods Three investigators respectively used the Munro scales,Braden scales and self-designed scales to conduct the pressure ulcer risk-assessment on 261 patients with general anesthesia surgery before operation,at the end of operation and at exiting from anesthesia recovery room.The sensitivity,specificity,positive predictive value and negative predictive value of each assessment tool were calculated.Results The best critical values of the Munro scales before operation,at the end of operation and at exiting from anesthesia recovery room were 8.0,24.5,28.5 points respectively;which of the Braden scale were 18.5,11.5,13.5 points respectively;which of self-made scale were 12.5,13.5,13.5 points respectively.The area under the ROC curve of the three different scales at the beginning of the operation above was 0.653,0.596,0.652.The area under the ROC curve of the three different scales at the end of the operation above was 0.872,0.548,0.792.The areas under the ROC curve of the three different scales before operation were 0.868,0.773 and 0.813 respectively.Conclusion The Chinese version of Munro scales is more suitable for the assessment of operative patient's pressure ulcer risk than the Braden scale and self-designed scales,but the preoperative risk assessment needs to be improved.

Objective:To evaluate the clinical efficacy and safety of the innovative topical ozone therapy for infantile atopic dermatitis.Methods:Sixty children with atopic dermatitis were divided into a treatment group and a control group.The treatment group was showered with ozonated water (3-5 times a week) and smeared with ozonated oil (twice a day),while the control group was washed with warm running water and smeared with base oil,adding moisturizer if necessary.The treatment course was 2 weeks.Efficacy and side effect were evaluated.Results:The skin exudation was reduced and erosion was healing after 3-5 days topical ozone therapy for infantile atopic dermatitis.The effective rates were 80.0％ and 20.0％ in the treatment group and control group for 1 week,and 89.6％ and 30.7％ for 2 weeks,respectively,with significant difference between the 2 groups (P＜0.001).Conclusion:Innovative treatment of infantile atopic dermatitis with topical ozone application is safe and effective,which is worth popularizing in clinic.