目的:研究Ⅱ~Ⅳ期胰腺癌患者经重离子放疗或放疗联合化疗的MRI影像学资料,以评估疗效。方法:回顾性分析我院收治的经碳离子治疗的49例Ⅱ~Ⅳ期胰腺癌患者的肿瘤轴位面积及DWI弥散加权成像中的ADC值,以治疗前数值为基线,与治疗后第1个月及...目的:研究Ⅱ~Ⅳ期胰腺癌患者经重离子放疗或放疗联合化疗的MRI影像学资料,以评估疗效。方法:回顾性分析我院收治的经碳离子治疗的49例Ⅱ~Ⅳ期胰腺癌患者的肿瘤轴位面积及DWI弥散加权成像中的ADC值,以治疗前数值为基线,与治疗后第1个月及第3~7个月复查时的肿瘤轴位面积及ADC值进行对比。结果:在重离子放疗后第1个月复查,瘤灶面积较治疗前明显缩小,差异有统计学意义(P<0.05);分析了11例患者治疗后第3~7个月复查的轴位面积,发现瘤灶面积较治疗后第1月复查缩小(P=0.01);而重离子放疗后第1个月复查,与治疗前肿瘤ADC值相比明显升高(P<0.01)。胰腺癌经碳离子治疗前后病灶面积与ADC值的ROC曲线显示,病灶面积基线期与治疗后1个月、治疗后3~7月比较,AUC分别为0.567、0.858,提示用第3~7个月时复查瘤灶面积缩小预测重离子放疗胰腺癌有效的准确率更高。结论:重离子放疗联合化疗或单独使用治疗不能手术中晚期胰腺癌患者,初期复查疗效显著,3.0 T MRI可对重离子治疗胰腺癌患者进行疗效评估。展开更多
This paper presents an assessment of the hydrochemical characteristics of groundwater in Northern Gezira State, Central Sudan. The approaches followed here include the chemical analyses for major ions chemistry and co...This paper presents an assessment of the hydrochemical characteristics of groundwater in Northern Gezira State, Central Sudan. The approaches followed here include the chemical analyses for major ions chemistry and construction of hydrochemical maps of total dissolved solids (TDS), sodium (Na +), bicarbonate (HCO 3 -), and chloride (Cl -) ions. The hydrochemical characteristics of the groundwater in each aquifer and management consideration are discussed. Sources of major ions in groundwater are analyzed. The hydrochemical maps of important species are constructed. The relationship of groundwater to use is elaborated. High concentrations of the chemical and hydrochemical constituents and the occurrence of calcretes (CaCO 3) in upper zones suggest a long history of evaporation and increasing leachates.展开更多
This paper presents numerous physical characteristics of Ca, V, Sn doped yttrium iron garnet (CaVSn:YIG) irradiated with 0.56GeV carbon ions delivered by the Heavy Ion Research Facility of Lanzhou (HIRFL). The reason...This paper presents numerous physical characteristics of Ca, V, Sn doped yttrium iron garnet (CaVSn:YIG) irradiated with 0.56GeV carbon ions delivered by the Heavy Ion Research Facility of Lanzhou (HIRFL). The reason for change of the magnetic properties of the samples induced by energetic carbon ions bombardment is discussed. By comparison of this results with the irradiation effects of YIG induced by energetic argon, krypton and xenon obtained on the GANIL, Caen,France, it is concluded that the irradiation effect of 0.56 GeV C6+ on CaVSn.YIG arises from the electronic energy losses.展开更多
Environmental pollution and energy crisis are two major global challenges to human beings.Recovering energy from wastewater is considered to be one of the effective approaches to address these two issues synchronously...Environmental pollution and energy crisis are two major global challenges to human beings.Recovering energy from wastewater is considered to be one of the effective approaches to address these two issues synchronously.As the main pollutants in wastewater,toxic heavy metal ions are the potential candidates for energy storage devices with pseudocapacitive behaviors.In this study,toxic metal ions of Cr(VI)and Cu(II)are removed efficiently by chitosan coated oxygen-containing functional carbon nanotubes,and the corresponding equilibrium adsorption capacity is 142.1 and 123.7 mg g^(-1).Followed by carbonization of metal ions-adsorbed adsorbents,Cu-and Cr N-loaded carbon composites can be obtained.Electrochemical measurements show that the supercapacitor electrodes based on Cu-and Cr N-loaded carbon composites have specific capacitance of 144.9 and 114.9 F g^(-1)at2 m V s^(-1),with superior electrochemical properties to pure chitosan coated carbon nanotubes after carbonization.This work demonstrates a new strategy for the resource-utilization of other heavy metal ions for energy devices,and also provides a new way to turn environmental pollutants into clean energy.展开更多
文摘目的:研究Ⅱ~Ⅳ期胰腺癌患者经重离子放疗或放疗联合化疗的MRI影像学资料,以评估疗效。方法:回顾性分析我院收治的经碳离子治疗的49例Ⅱ~Ⅳ期胰腺癌患者的肿瘤轴位面积及DWI弥散加权成像中的ADC值,以治疗前数值为基线,与治疗后第1个月及第3~7个月复查时的肿瘤轴位面积及ADC值进行对比。结果:在重离子放疗后第1个月复查,瘤灶面积较治疗前明显缩小,差异有统计学意义(P<0.05);分析了11例患者治疗后第3~7个月复查的轴位面积,发现瘤灶面积较治疗后第1月复查缩小(P=0.01);而重离子放疗后第1个月复查,与治疗前肿瘤ADC值相比明显升高(P<0.01)。胰腺癌经碳离子治疗前后病灶面积与ADC值的ROC曲线显示,病灶面积基线期与治疗后1个月、治疗后3~7月比较,AUC分别为0.567、0.858,提示用第3~7个月时复查瘤灶面积缩小预测重离子放疗胰腺癌有效的准确率更高。结论:重离子放疗联合化疗或单独使用治疗不能手术中晚期胰腺癌患者,初期复查疗效显著,3.0 T MRI可对重离子治疗胰腺癌患者进行疗效评估。
文摘This paper presents an assessment of the hydrochemical characteristics of groundwater in Northern Gezira State, Central Sudan. The approaches followed here include the chemical analyses for major ions chemistry and construction of hydrochemical maps of total dissolved solids (TDS), sodium (Na +), bicarbonate (HCO 3 -), and chloride (Cl -) ions. The hydrochemical characteristics of the groundwater in each aquifer and management consideration are discussed. Sources of major ions in groundwater are analyzed. The hydrochemical maps of important species are constructed. The relationship of groundwater to use is elaborated. High concentrations of the chemical and hydrochemical constituents and the occurrence of calcretes (CaCO 3) in upper zones suggest a long history of evaporation and increasing leachates.
文摘This paper presents numerous physical characteristics of Ca, V, Sn doped yttrium iron garnet (CaVSn:YIG) irradiated with 0.56GeV carbon ions delivered by the Heavy Ion Research Facility of Lanzhou (HIRFL). The reason for change of the magnetic properties of the samples induced by energetic carbon ions bombardment is discussed. By comparison of this results with the irradiation effects of YIG induced by energetic argon, krypton and xenon obtained on the GANIL, Caen,France, it is concluded that the irradiation effect of 0.56 GeV C6+ on CaVSn.YIG arises from the electronic energy losses.
基金supported by the National Natural Science Foundation of China(51602182,21535004,21390411)Shandong Provincial Natural Science Foundation(ZR2016EMQ02,ZR2016BP07)
文摘Environmental pollution and energy crisis are two major global challenges to human beings.Recovering energy from wastewater is considered to be one of the effective approaches to address these two issues synchronously.As the main pollutants in wastewater,toxic heavy metal ions are the potential candidates for energy storage devices with pseudocapacitive behaviors.In this study,toxic metal ions of Cr(VI)and Cu(II)are removed efficiently by chitosan coated oxygen-containing functional carbon nanotubes,and the corresponding equilibrium adsorption capacity is 142.1 and 123.7 mg g^(-1).Followed by carbonization of metal ions-adsorbed adsorbents,Cu-and Cr N-loaded carbon composites can be obtained.Electrochemical measurements show that the supercapacitor electrodes based on Cu-and Cr N-loaded carbon composites have specific capacitance of 144.9 and 114.9 F g^(-1)at2 m V s^(-1),with superior electrochemical properties to pure chitosan coated carbon nanotubes after carbonization.This work demonstrates a new strategy for the resource-utilization of other heavy metal ions for energy devices,and also provides a new way to turn environmental pollutants into clean energy.
