Child ; China ; Humans ; Rheumatic Diseases

Purpose:To evaluate the different dose distribution created by three different plans on a nasopharyngeal carcinoma case with simultaneous integrated boost intensity modulated radiation therapy (SIB-IMRT). Methods:we designed three different SIB-IMRT plans on a nasopharyngeal carcinoma case, one was from anterior direction of the head, 5 non-equally spaced fields, another was from posterior direction of the head, 5 non-equally spaced fields also, third was 5 equally spaced fields around the head. Each plan had its dose distribution to the target and main critical structures.Results:No significant difference of dose distribution to the target when comparing the previous three different IMRT plans. However, dose to the parotids delivered from 5-equally spacd was obviously lower than the other plans, dose to the optic chiasm was much lower created by the plan designed from the posterior direction of the head with 5 non-equally spacea field.Conclusions:For a nasopharyngeal carcinoma case, there is no significant difference of dose distribution to the target compared with three different 5-beam orientation SIB-IMRT plans. To protect parotids, we recommend designing a plan with equal beam direction around the head. When the target is very close to the optic chiasm, plauning from posterior direction of the head should be better.

An investigation and analysis on the effect of current bilingual teaching has been done among the 2002rd seven-year program students by using questionnaire.The result can provide basic foundation for improving the quality of bilingual teaching.

BACKGROUND:IKVAV-containing peptide sequence is an active region that promotes the adhesion, growth, and differentiation of neural cells in the laminin. It can be fabricated into a novel tissue-engineered scaffold material by self-assembly into hydrogel.OBJECTIVE: This study was designed to synthesize IKVAV-containing (C16H31O-AAAA GGGEIKVAV) peptide. The peptide was observed self-assembly into three-dimensional and porous hydrogel after triggered with phosphate buffered saline (PBS).DESIGN, TIME AND SETTING: Single-sample experiment, performed in the Laboratory of Department of Orthopedics,Union Hospital Affiliated to Tongji Medical College, Huazhong University of Science and Technology between September 2004 and January 2005.MATERIALS: IKVAV-containing peptide was synthesized by solid phase method.METHODS: Peptide purity and relative molecular mass were detected by high performance liquid chromatogram and mass-spectrometry, respectively. 1% peptide, whose pH value was equal to 9.5, was self-assembled into hydrogel with the addition of PBS. The ultramicrostructure of the hydrogei was observed through the use of transmission electron microscope (TEM).MAIN OUTCOME MEASURES: Peptide purity and relative molecular mass were detected. Moreover, gross observation of the peptide after self-assembly and TEM observation of peptide ultramicrostructure were performed.RESULTS: Peptide relative molecular mass was 1351.6, which was in accordance with its theoretical value. Peptide purity was 95%. After triggered with PBS, 1% peptide was self-supported into hydrogel in a few seconds. TEM results showed that self-assembled hydrogel consisted of the interconnected nanofibers which varied from 3 to 6 nm in diameter and 100 to 1 500 nm m in length.CONCLUSION: The IKVAV-containing peptide was synthesized and self-organized successfully into porous hydrogel,which was triggered with PBS solution.

Objective:To evaluate the role of the left ventricular ejection fraction (LVEF) in coronary artery bypass grafting(CABG)patients. Methods: From 2004 to 2005,215 patients underwent CABG and there were 36 cases with LVEF0.40(normal LVEF group). Correlative data of the two groups were compared and analyzed statistically. Results: Compared with the normal EF group, the EuroSCORE of the low EF group was much higher (mean 6.4?1.7) and many more patients of the low EF group had concomitant moderate to severe mitral valve insufficiency and aneurysm that needed simultaneous surgical operation(55.6%).Two patients died in hospital(5.5%)in the low EF group whereas five patients in the normal EF group(2.8%, P

Wet age-related macular degeneration (AMD) is one of major causes of blindness in elder people.Intraocular injection of anti-vascular endothelial growth factor (VEGF) -A regimen has made big breakthrough for the treatment on choroidal neovascularization of wet AM D,while long-term follow-up and necessary retreatments are the key issues to remain obtained visual acuity.Multiple strategies of wet AMD have been used in following-up and retreating based on the visual acuity,optical coherence tomography (OCT),ophthalmoscope and fluorescein fundus angiography (FFA) in abroad.However,there also are major differences in the patient' s composition,treatment habits and distribution of medical sources in China from Western.So we suggest to standardize the follow-up and retreatment strategies about intravitreal injection of VEGF-A for wet AMD as to achieve a better effectiveness.OCT-guided individual follow-up and retreatment strategies should be very helpful for maintaining a long-term efficacy,minimizing the treatment time and reducing medical cost.

Objective To study the effects of endolymphatic sac decompression and on semicircular canal plugging in treating intractable Meniere's disease.Methods A total of 14 cases of intractable Meniere's disease were included in this study.The age was from 33~67 years old and the history was from 1 to 40 years.The hearing level of bone was from 35 to 65 dB for the speech frequencies.All cases received the treatments according to the pre-op-erative design.The endolymphatic sac was decompressed and the three semicircular canal bones were drilled to cre-ate a fenestra followed by soft tissue plugging into the canal.The vertigo,hearing level and tinnitus were included in the following up.Results All cases had no facial palsy,no cerebrospinal leak,and no vertical after surgery.In the period of 3 to 18 months following up,the attack of Meniere's disease was completely controlled for 13 cases excep-tion of one lost case.For five cases,the hearing level descended 10 to 15 dB compared to pre-operation.Conclusion Although the endolymphatic sac decompression can relieve endolymphatic pressure,this may not adequately pro-tect the hearing caused by the semicircular canal plugging.The surgical technique is reliable and safe;however fur-ther clinical data should be gathered.

A bacterium which can effectively degrade LAS (Linear Sodium Alkylbenzenesulfonate) was isolated from washing powder manufacturing effluent and was preliminarily identified as Corynebacterium jeikeium GZ6. The bacterium can degrade LAS up to till 700 mg/L, and the optimum pH, temperature and concentration of LAS are 7.0, 30℃ and 400 mg/L, respectively. The biodegradation rate can reach 98.7% after 24 hours'cultivation in the suitable conditions. Experiments also showed that some heavy metal ions such as Hg2+ , Co2+ , Cd2+ can differently inhibit the degradation of LAS.

AIM: To determine the contents of tetrandrine and fangchinoline in Qingshenjianfei Tablets by RP-HPLC. METHODS:In this method Zorbax C 18 column was used, and methanol—0.3%diethylamine (75∶25) as a mobile phase , the detection wavelength was at 242 nm. RESULTS:The recovery of tetrandrine was 103.65% and RSD was 1.59% .The recovery of fangchinoline was 97.11% and RSD was 1.91% (n=6). CONCLUSION: This method is simple,quick,reproducible and can be used for the quantitative analysis。

Objective To evaluate the changes of physical activity status of residents in Beijing Yayuncun(Asian Games Village)Community.Methods A total of 1765 permanent residents over 15 from 600 families living in Yayuncun Communities since 2000 were selected in this prospective study.Thebaseline survey was carried out with the Questionnaire for Residents of Beijing Typical Community in 2004 and 2005.From 2006 to 2008,same questionnaire was used for the follow-up survey,and 1412 residents were responded to the questionnaire.Results The knowledge levels related to physical exercise of Yayuncun residents elevated(P＜0.01).The source of knowledge gain from Olympics Games promotion,specialized community lectures and intemet increase significantly(P＜0.01),that from other media decreased(P＜0.01).The exercise rate in community was higher than in other sites(P＜0.01)and increased significantly (P＜0.05);while doing exercise in charged sites decreased(P＜0.05).Logistic regression analysis showed that regular physical exercise was related to age,BMI,exercise-related knowledge,exercise sites,attitude for sport facilities and chronological order.Conclusion During the preparation for the Beijing Olympic Games.the status of physical exercise of residents in Yayuncun Community presented the positive trends.