目的:探讨超声引导下细针穿刺活检(ultrasound guided fine needle aspiration biopsy,US-FNAB)对甲状腺结节的诊断价值。方法:回顾性分析天津医科大学总医院2016年1月至2017年4月行US-FNAB检查的甲状腺结节患者的临床特点及细胞病理诊...目的:探讨超声引导下细针穿刺活检(ultrasound guided fine needle aspiration biopsy,US-FNAB)对甲状腺结节的诊断价值。方法:回顾性分析天津医科大学总医院2016年1月至2017年4月行US-FNAB检查的甲状腺结节患者的临床特点及细胞病理诊断结果,对细胞诊断结果和手术病理结果进行对照分析。结果:在1 241例病例中,甲状腺结节男女比1:3.83(257/984),甲状腺结节的发病率从20岁开始逐年增加,60岁以后发病率开始下降。肿瘤最大径≤1.0 cm的结节640例(51.57%),TI-RADS 4级的结节1 072例(86.38%)。细胞学诊断结果中无法诊断的病例273例(22.00%),良性121例(9.75%),意义不明确的细胞非典型病变380例(30.62%),可疑恶性399例(32.15%),恶性68例(5.48%)。其中在天津医科大学总医院行手术的302例患者中,US-FNAB细胞病理有明确诊断203例,无法诊断21例,意义不明确的细胞非典型病变78例。203例明确诊断的病例中,US-FNAB诊断的灵敏度为100.00%(201/201),特异度为50.00%(1/2),阳性预测值99.50%(201/202),阴性预测值100.00%(1/1),诊断的准确率99.51%(202/203),误诊率0.49%(1/203)。在细胞学诊断为意义不明确的细胞非典型病变的78例中,恶性率70.51%。意义不明确细胞非典型病变是否为恶性与患者的年龄、性别、肿瘤大小和部位均无关(均P>0.05),与甲状腺超声影像报告和数据系统(thyroid imaging reporting and data system,TI-RADS)分级有关(P<0.05)。结论:US-FNAB对甲状腺结节有较高的诊断价值,值得推广应用,可以考虑部分代替术中冰冻,减少术中等候时间和患者的经济负担。展开更多
Controlled growth of patterned single-walled carbon nanotubes (SWNTs) is an important issue in many applications. Herein, we demonstrated a method to pattern catalyst via inkjet printing for the growth of SWNTs, using...Controlled growth of patterned single-walled carbon nanotubes (SWNTs) is an important issue in many applications. Herein, we demonstrated a method to pattern catalyst via inkjet printing for the growth of SWNTs, using metal salt solutions as the inks and an ordinary office-use printer. We printed water solutions of cobalt acetate on hydrophilic Si substrates and grew high quality SWNT films. The composition of the precursor solutions and the hydrophilicity of the substrates were crucial factors to the patterning.展开更多
A strategy to prepare horizontally aligned single-walled carbon nanotubes(SWNTs) at moderate temperatures(≤600 ℃) were developed.Using ferocene as the catalyst precursor,Fe nanoparticles are formed in the gaseous ph...A strategy to prepare horizontally aligned single-walled carbon nanotubes(SWNTs) at moderate temperatures(≤600 ℃) were developed.Using ferocene as the catalyst precursor,Fe nanoparticles are formed in the gaseous phase and catalyze the nucleation and growth of SWNTs in situ.Then the resultant SWNTs are deposited onto the substrates downstream and aligned by the surface lattice of the ST-cut single crystal quartz.The preparation of SWNT arrays at moderate temperatures is important for combining the tube growth with device fabrication.展开更多
The biosorption of Cd2＋ and CH2＋ onto the immobilized Saccharomyces cerevisiae （S. cerevisiae） was investigated in this study. Adsorption kinetics, isotherms and the effect ofpH were studied. The results indicated...The biosorption of Cd2＋ and CH2＋ onto the immobilized Saccharomyces cerevisiae （S. cerevisiae） was investigated in this study. Adsorption kinetics, isotherms and the effect ofpH were studied. The results indicated that the biosorption of Cd^2＋ and Cu^2＋ on the immobilized S. cerevisiae was fast at initial stage and then became slow. The maximum biosorption of heavy metal ions on immobilized S. cerevisiae were observed at pH 4 for Cde＋ and Cu^2＋. by the pseudo-second-order model described the sorption kinetic data well according to the high correlation coefficient （R2） obtained. The biosorption isotherm was fitted well by the Langmuir model, indicating possible mono-layer biosorption of Cd^2＋ and Cu^2＋ on the immobilized S. cerevisiae. Moreover, the immobilized S. cerevisiae after the sorption of Cd^2＋ and Cu^2＋ could be regenerated and reused.展开更多
文摘目的:探讨超声引导下细针穿刺活检(ultrasound guided fine needle aspiration biopsy,US-FNAB)对甲状腺结节的诊断价值。方法:回顾性分析天津医科大学总医院2016年1月至2017年4月行US-FNAB检查的甲状腺结节患者的临床特点及细胞病理诊断结果,对细胞诊断结果和手术病理结果进行对照分析。结果:在1 241例病例中,甲状腺结节男女比1:3.83(257/984),甲状腺结节的发病率从20岁开始逐年增加,60岁以后发病率开始下降。肿瘤最大径≤1.0 cm的结节640例(51.57%),TI-RADS 4级的结节1 072例(86.38%)。细胞学诊断结果中无法诊断的病例273例(22.00%),良性121例(9.75%),意义不明确的细胞非典型病变380例(30.62%),可疑恶性399例(32.15%),恶性68例(5.48%)。其中在天津医科大学总医院行手术的302例患者中,US-FNAB细胞病理有明确诊断203例,无法诊断21例,意义不明确的细胞非典型病变78例。203例明确诊断的病例中,US-FNAB诊断的灵敏度为100.00%(201/201),特异度为50.00%(1/2),阳性预测值99.50%(201/202),阴性预测值100.00%(1/1),诊断的准确率99.51%(202/203),误诊率0.49%(1/203)。在细胞学诊断为意义不明确的细胞非典型病变的78例中,恶性率70.51%。意义不明确细胞非典型病变是否为恶性与患者的年龄、性别、肿瘤大小和部位均无关(均P>0.05),与甲状腺超声影像报告和数据系统(thyroid imaging reporting and data system,TI-RADS)分级有关(P<0.05)。结论:US-FNAB对甲状腺结节有较高的诊断价值,值得推广应用,可以考虑部分代替术中冰冻,减少术中等候时间和患者的经济负担。
基金financially supported by Ministry of Science and Technology of the People's Republic of China(No. 2016YFA0201904)the National Natural Science Foundation of China (Nos. 21631002, U1632119 and 91333105)
文摘Controlled growth of patterned single-walled carbon nanotubes (SWNTs) is an important issue in many applications. Herein, we demonstrated a method to pattern catalyst via inkjet printing for the growth of SWNTs, using metal salt solutions as the inks and an ordinary office-use printer. We printed water solutions of cobalt acetate on hydrophilic Si substrates and grew high quality SWNT films. The composition of the precursor solutions and the hydrophilicity of the substrates were crucial factors to the patterning.
基金supported by Ministry of Science and Technology of China(2016YFA0201904)the National Natural Science Foundation of China(21631002,U1632119)
文摘A strategy to prepare horizontally aligned single-walled carbon nanotubes(SWNTs) at moderate temperatures(≤600 ℃) were developed.Using ferocene as the catalyst precursor,Fe nanoparticles are formed in the gaseous phase and catalyze the nucleation and growth of SWNTs in situ.Then the resultant SWNTs are deposited onto the substrates downstream and aligned by the surface lattice of the ST-cut single crystal quartz.The preparation of SWNT arrays at moderate temperatures is important for combining the tube growth with device fabrication.
文摘The biosorption of Cd2＋ and CH2＋ onto the immobilized Saccharomyces cerevisiae （S. cerevisiae） was investigated in this study. Adsorption kinetics, isotherms and the effect ofpH were studied. The results indicated that the biosorption of Cd^2＋ and Cu^2＋ on the immobilized S. cerevisiae was fast at initial stage and then became slow. The maximum biosorption of heavy metal ions on immobilized S. cerevisiae were observed at pH 4 for Cde＋ and Cu^2＋. by the pseudo-second-order model described the sorption kinetic data well according to the high correlation coefficient （R2） obtained. The biosorption isotherm was fitted well by the Langmuir model, indicating possible mono-layer biosorption of Cd^2＋ and Cu^2＋ on the immobilized S. cerevisiae. Moreover, the immobilized S. cerevisiae after the sorption of Cd^2＋ and Cu^2＋ could be regenerated and reused.
