目的:分析新疆石河子地区三阴性乳腺癌(triple-negtive breast cancer,TNBC)与非TNBC临床病理特征及预后。方法:回顾性分析新疆石河子地区女性乳腺癌患者360例,手术病理资料完整,比较TNBC和非TNBC的临床病理特征、复发、转移及生存分析...目的:分析新疆石河子地区三阴性乳腺癌(triple-negtive breast cancer,TNBC)与非TNBC临床病理特征及预后。方法:回顾性分析新疆石河子地区女性乳腺癌患者360例,手术病理资料完整,比较TNBC和非TNBC的临床病理特征、复发、转移及生存分析。结果:TNBC较非TNBC具有以下特征:肿瘤直径较大(肿瘤直径≥2cm分别是78.3%、37.6%,P<0.05),淋巴结转移率高(73.3%、53.0%,P<0.05);淋巴结转移数目多(淋巴结转移数≥4个分别是36.7%、13.9%,P<0.05);临床分期晚(Ⅲ-Ⅳ期比例分别是46.7%、24.3%,P<0.05);容易发生肺转移(21.7%、5.7%,P<0.05);TNBC的5年生存率是75.2%,非TNBC的是86.7%(P<0.05);TNBC的5年无疾病生存率是52.5%,非TNBC的是75.5%(P<0.05)。结论:新疆石河子地区TNBC患者具有肿瘤大、淋巴结转移多、临床分期晚的特征,且易发生肺转移、预后差。展开更多
研究坡向和坡位如何影响土壤团聚体的稳定性,对于理解地貌复杂的高山峡谷地区土壤稳定性的维持具有重要意义,然而目前对高山灌丛土壤特征研究还相对薄弱,研究以四川夹金山高山灌丛土壤为研究对象,分析了不同坡向和坡位对土壤团聚体粒径...研究坡向和坡位如何影响土壤团聚体的稳定性,对于理解地貌复杂的高山峡谷地区土壤稳定性的维持具有重要意义,然而目前对高山灌丛土壤特征研究还相对薄弱,研究以四川夹金山高山灌丛土壤为研究对象,分析了不同坡向和坡位对土壤团聚体粒径分布、稳定性及分形特征的影响,构建偏最小二乘路径模型(Partial Least Squares Path Modeling,PLS-PM),分析坡向和坡位对土壤团聚体稳定性的作用机制.结果表明:①土壤机械稳定性团聚体粒径分布仅受坡向影响,土壤水稳性团聚体粒径分布受坡向、坡位影响且二者存在交互作用;②中坡位土壤团聚体稳定性较优于下坡位,3个坡向中阴坡土壤稳定性最次;③坡向是影响土壤团聚体的主要因素,其作用主要是通过影响土壤物理性质(容重、含水率、孔隙度)而间接决定的,同时坡向通过影响群落灌木层特征(多度、丰度和生物量)作用于土壤化学性质(TN、TP、TK、SOM、pH),最终对土壤团聚体稳定性产生一定影响,坡向作用下的群落草本层特征并未显示出对土壤理化性质和团聚体稳定性的作用;④使用土壤分形维数表征团聚体稳定性具有可行性.展开更多
A hydrotalcite with Mg/AI molar ratio 2 was prepared by co-precipitation method and was characterized by XRD, TG/DTA, Zeta potential and BET surface area. The hydrotalcite was calcined at 500℃, with the dehydration f...A hydrotalcite with Mg/AI molar ratio 2 was prepared by co-precipitation method and was characterized by XRD, TG/DTA, Zeta potential and BET surface area. The hydrotalcite was calcined at 500℃, with the dehydration from interlayer, the dehydroxilation from the brucite-like layer and the decomposition of carbonate successively, transformed into the mixed oxide type. The removal of thiocyanate from aqueous solution by using the original hydrotalcite and calcined hydrotalcite （HTC-500） was investigated. The results showed that the thiocyanate adsorption capacity of calcined hydrotalcite was much higher than that of the original form. Calcined hydrotalcite was particularly effective at removing thiocyanate, and that the effective range of pH for the thiocyanate removal are between 5.5-10.0. The experimental data of thiocyanate removal fit nicely with Langmuir isotherm, and the saturated adsorption uptake was 96.2 mg SCN-/g HTC-500. The adsorption of thiocyanate by calcined hydrotalcite follows first-order kinetics. And the intercalation to the structure recovery for calcined hydrotalcite. But the presence of additional anions could affect the adsorption behavior of thiocyanate.展开更多
文摘目的:分析新疆石河子地区三阴性乳腺癌(triple-negtive breast cancer,TNBC)与非TNBC临床病理特征及预后。方法:回顾性分析新疆石河子地区女性乳腺癌患者360例,手术病理资料完整,比较TNBC和非TNBC的临床病理特征、复发、转移及生存分析。结果:TNBC较非TNBC具有以下特征:肿瘤直径较大(肿瘤直径≥2cm分别是78.3%、37.6%,P<0.05),淋巴结转移率高(73.3%、53.0%,P<0.05);淋巴结转移数目多(淋巴结转移数≥4个分别是36.7%、13.9%,P<0.05);临床分期晚(Ⅲ-Ⅳ期比例分别是46.7%、24.3%,P<0.05);容易发生肺转移(21.7%、5.7%,P<0.05);TNBC的5年生存率是75.2%,非TNBC的是86.7%(P<0.05);TNBC的5年无疾病生存率是52.5%,非TNBC的是75.5%(P<0.05)。结论:新疆石河子地区TNBC患者具有肿瘤大、淋巴结转移多、临床分期晚的特征,且易发生肺转移、预后差。
文摘研究坡向和坡位如何影响土壤团聚体的稳定性,对于理解地貌复杂的高山峡谷地区土壤稳定性的维持具有重要意义,然而目前对高山灌丛土壤特征研究还相对薄弱,研究以四川夹金山高山灌丛土壤为研究对象,分析了不同坡向和坡位对土壤团聚体粒径分布、稳定性及分形特征的影响,构建偏最小二乘路径模型(Partial Least Squares Path Modeling,PLS-PM),分析坡向和坡位对土壤团聚体稳定性的作用机制.结果表明:①土壤机械稳定性团聚体粒径分布仅受坡向影响,土壤水稳性团聚体粒径分布受坡向、坡位影响且二者存在交互作用;②中坡位土壤团聚体稳定性较优于下坡位,3个坡向中阴坡土壤稳定性最次;③坡向是影响土壤团聚体的主要因素,其作用主要是通过影响土壤物理性质(容重、含水率、孔隙度)而间接决定的,同时坡向通过影响群落灌木层特征(多度、丰度和生物量)作用于土壤化学性质(TN、TP、TK、SOM、pH),最终对土壤团聚体稳定性产生一定影响,坡向作用下的群落草本层特征并未显示出对土壤理化性质和团聚体稳定性的作用;④使用土壤分形维数表征团聚体稳定性具有可行性.
文摘A hydrotalcite with Mg/AI molar ratio 2 was prepared by co-precipitation method and was characterized by XRD, TG/DTA, Zeta potential and BET surface area. The hydrotalcite was calcined at 500℃, with the dehydration from interlayer, the dehydroxilation from the brucite-like layer and the decomposition of carbonate successively, transformed into the mixed oxide type. The removal of thiocyanate from aqueous solution by using the original hydrotalcite and calcined hydrotalcite （HTC-500） was investigated. The results showed that the thiocyanate adsorption capacity of calcined hydrotalcite was much higher than that of the original form. Calcined hydrotalcite was particularly effective at removing thiocyanate, and that the effective range of pH for the thiocyanate removal are between 5.5-10.0. The experimental data of thiocyanate removal fit nicely with Langmuir isotherm, and the saturated adsorption uptake was 96.2 mg SCN-/g HTC-500. The adsorption of thiocyanate by calcined hydrotalcite follows first-order kinetics. And the intercalation to the structure recovery for calcined hydrotalcite. But the presence of additional anions could affect the adsorption behavior of thiocyanate.
