同期放化疗对比单纯放疗治疗非高发区T1~2N1M0期鼻咽癌远期疗效观察

目的:回顾性配对分析以适形调强放疗为基础的不同治疗模式对非高发区T1~2N1M0期鼻咽癌患者预后的影响。方法:回顾性分析2010年1月至2015年12月河南省肿瘤医院初治的行根治性放疗的T1~2N1M0期鼻咽癌患者,筛选出51对患者(单纯放疗组和同期放化疗组各51例)进行配对分析。比较两组患者各项生存率及急性不良反应。结果:全组5年总生存率、无局部复发生存率、无区域复发生存率、无远处转移生存率分别为94.1%、93.6%、96.7%、90.9%。单纯放疗组与同期放化疗组相比,5年总生存率(95.9%vs. 92.2%,P=0.894)、无局部复发生存率(94.1%vs. 93.3%,P=0.976)、无区域复发生存率(95.8%vs. 97.6%,P=0.572)、无远处转移生存率(91.4%vs. 90.2%,P=0.716),差异均无统计学意义。急性不良反应方面,与单纯放疗组相比,同期放化疗组呕吐、中性粒细胞减少、白细胞减少、血红蛋白减少和黏膜炎的发生率显著升高。结论:对于T1~2N1M0期鼻咽癌患者,同期化疗的加入并未明显改善患者预后,且急性不良反应增加。

不同治疗方案治疗ⅠB2、ⅡA2期宫颈癌预后分析(英文)

Objective:The aim of this study was to explore the difference of long-term prognosis of different treatment regimens in patients with stage ⅠB2, ⅡA2 cervical cancer. Methods:From August 1995 to September 2005, radical hysterectomy was chosen as primary treatment regimen for 122 patients (group A), 85 patients underwent radical hysterectomy after effective neoadjuvant therapy (group B), and 98 patients received surgery after ineffective preoperative therapy (group C). All patients received postoperative therapy. Results:A total of 305 patients were analyzed. The maximum diameter of tumor was largest in group B, while the pathological risk factors (cervical infiltration, positive surgical margins) were in the lowest proportion. The 5-year mortality rate and relapse rate of group B were the highest, and the overall survival (OS) and progression-free survival (PFS) were the shortest (P < 0.05). No significant difference of long-term survival was found in group C and group A. No difference was found in the surgical of three groups. Large tumor more than 5.5 cm had higher effective ratio of treatment than those 5.5 cm or less. Patients received effective preoperative radiotherapy had better long-term prognosis than those received chemotherapy or radiochemotherapy. Conclusion:neoadjuvant treatment using for patients with ⅠB2, ⅡA2 cervical cancer is effective in reducing risk factors of pathological, but it could not improve the long-term survival. The indications of adjuvant therapy after surgery should be reconsidered. Those tumors of diameter 5.5 cm or less response poor to neoadjuvant treatment, and no improvement of survival was found, so direct surgical treatment is suggested for these patients. Radiotherapy is a better choice of preoperative treatment.

Nutrient distribution within and release from the contaminated sediment of Haihe River

We assessed nutrient characteristics, distributions and fractions within the disturbed and undisturbed sediments at four sampling sites within the mainstream of Haihe River. The river sediments contained mostly sand （ 60%）. The fraction of clay was 3%. Total nitrogen （TN） and total phosphorus （TP） concentrations ranged from 729 to 1922 mg/kg and from 692 to 1388 mg/kg, respectively. Nutrient concentrations within the sediments usually decreased with increasing depth. The TN and TP concentrations within the fine sand were higher than for that within silt. Sediment phosphorus fractions were between 2.99% and 3.37% Ex-P （exchangeable phosphorus）, 7.89% and 13.71% Fe/Al-P （Fe, Al oxides bound phosphorus）, 61.32% and 70.14% Ca-P （calcium-bound phosphorus）, and 17.03% and 22.04% Org-P （organic phosphorus）. Nitrogen and phosphorus release from sediment could lead to the presence of 21.02 mg N/L and 3.10 mg P/L within the water column. A river restoration project should address the sediment nutrient stock.

Analysis of mobilization of inorganic ions in soil by electrokinetic remediation

Saline soil has imposed a serious threat on many expressway engineering and agricultural areas.This paper describes the performance of saline soil treatment using electrokinetic remediation technology.Comparison study involving sample soil and in situ soil is carried out.Two different electric fields,i.e.,uniform and non-uniform are utilized to promote the migration of inorganic ions contained in the soil toward the electrode area.The effects of different electric field types and potential gradient ion migration rate in soil are investigated.The test result reveals that a uniform electric field of a constant potential gradient of 1 V/cm drives the Cl-through the sample soil at a rate of 1.36 cm/h.Moreover,larger potential gradients could make ions migrate faster,but more electrical energy is consumed in such a way.Compared with uniform electric field,the non-uniform process maintains the soil pH values more effectively and consumes less electrical energy.A desirable result of removing Na+in soil is expected using electrokinetic remediation technology under four-times scaling up of soil volume.