The XRD, TEM, PAT, Curie temperature and internal friction methods were used to study systematically the embrittlement mechanism of rapidly quenched ( RQ ) nanocrystalline soft magnetic alloy Fe73.5Cu1Nb3Si13.5B9.The ...The XRD, TEM, PAT, Curie temperature and internal friction methods were used to study systematically the embrittlement mechanism of rapidly quenched ( RQ ) nanocrystalline soft magnetic alloy Fe73.5Cu1Nb3Si13.5B9.The test results confirmed that the RQ embrittlement mechanism of amorphous alloy FeCuNbSiB was not related to crystallization but that was related to structural relaxation. Furthermore, the structural relaxation temperature of amorphous alloy FeCuNbSiB was much lower than that of used commonly amorphous alloy Fe78B13Si9. It meant that the RQ embrittlement is easier to happen for nanocrystalline alloy FeCuNbSiB than amorphous alloy Fe-B-Si.展开更多
目的:本研究通过检测PDCD5(programmed cell death 5)在成人急性髓系白血病(AML)患者中的表达,探讨PDCD5在AML发病中的作用及其与AML患者临床特征和预后的相关性。方法:分别采用实时定量PCR(RQ-PCR)和流式细胞术(FCM)检测36例初治AML患...目的:本研究通过检测PDCD5(programmed cell death 5)在成人急性髓系白血病(AML)患者中的表达,探讨PDCD5在AML发病中的作用及其与AML患者临床特征和预后的相关性。方法:分别采用实时定量PCR(RQ-PCR)和流式细胞术(FCM)检测36例初治AML患者的PDCD5 mRNA水平和胞内蛋白含量,并分析PDCD5 mRNA水平和蛋白含量与临床特征及生存时间的相关性。结果:AML患者的细胞内PDCD5蛋白含量显著高于正常人(P<0.05),mRNA水平较正常人无显著性差异(P>0.05)。PDCD5 mRNA和蛋白的表达水平与AML患者的性别、年龄、白细胞数、FAB亚型、髓外浸润情况、WT1基因、NPM1基因突变以及诱导化疗反应均无关(P>0.05),FLT3内部串联重复(FLT3/ITD)突变阳性者较突变阴性者PDCD5蛋白含量显著增高(P<0.05)。结论:AML患者PDCD5蛋白含量显著升高,但并未能发挥对AML细胞的促凋亡作用。FLT3/ITD突变阳性者PDCD5高表达。展开更多
目的探讨酒精性慢加亚急性肝衰竭患者(酒精肝衰竭组)的能量代谢与临床特点。方法选择28例酒精肝衰竭患者为研究组,48例乙肝慢加亚急性肝衰竭患者(乙肝肝衰竭组)为对照组,根据疾病程度分早期和中期,根据预后分恢复和死亡。应用间接能量...目的探讨酒精性慢加亚急性肝衰竭患者(酒精肝衰竭组)的能量代谢与临床特点。方法选择28例酒精肝衰竭患者为研究组,48例乙肝慢加亚急性肝衰竭患者(乙肝肝衰竭组)为对照组,根据疾病程度分早期和中期,根据预后分恢复和死亡。应用间接能量代谢测定仪及24h尿素氮测定患者静息能量消耗(resting energy expenditure,REE)、呼吸商(respiratory quotient,RQ)、碳水化合物(carbohydrate,CHO)、蛋白质(protein,PRO)和脂肪(FAT)的氧化率。结果酒精肝衰竭组RQ值显著低于乙肝肝衰竭组[(0.80±0.06)vs.(0.84±0.05),P=0.007]。同为疾病中期或死亡组,酒精肝衰竭组RQ值显著低于乙肝组[(0.78±0.05)vs.(0.83±0.05),(0.75±0.04)vs.(0.82±0.05),P均=0.001]。酒精肝衰竭组内,中期患者RQ显著低于早期[(0.78±0.05)vs.(0.83±0.05),P=0.007],死亡组RQ及CHO氧化率显著低于恢复组[(0.75±0.04)vs.(0.83±0.04),P=0.000;(25.82±13.04)%vs.(38.41±14.69)%,P=0.029],而FAT氧化率显著增高[(54.55±11.44)%vs.(40.29±14.53)%,P=0.011]。结论酒精肝衰竭患者REE与乙肝肝衰竭患者相似,均以FAT氧化供能为主、伴CHO利用障碍为代谢特点,并且随病情动态变化的趋势是一致的;酒精肝衰竭患者RQ值降低更加显著,RQ值与疾病严重程度和预后密切相关。合理的营养支持可降低营养不良的发生,改善预后。展开更多
基金supported by the National Amorphous and Nanocrystalline Alloy Engineering Research Center in CISRI
文摘The XRD, TEM, PAT, Curie temperature and internal friction methods were used to study systematically the embrittlement mechanism of rapidly quenched ( RQ ) nanocrystalline soft magnetic alloy Fe73.5Cu1Nb3Si13.5B9.The test results confirmed that the RQ embrittlement mechanism of amorphous alloy FeCuNbSiB was not related to crystallization but that was related to structural relaxation. Furthermore, the structural relaxation temperature of amorphous alloy FeCuNbSiB was much lower than that of used commonly amorphous alloy Fe78B13Si9. It meant that the RQ embrittlement is easier to happen for nanocrystalline alloy FeCuNbSiB than amorphous alloy Fe-B-Si.
文摘目的探讨酒精性慢加亚急性肝衰竭患者(酒精肝衰竭组)的能量代谢与临床特点。方法选择28例酒精肝衰竭患者为研究组,48例乙肝慢加亚急性肝衰竭患者(乙肝肝衰竭组)为对照组,根据疾病程度分早期和中期,根据预后分恢复和死亡。应用间接能量代谢测定仪及24h尿素氮测定患者静息能量消耗(resting energy expenditure,REE)、呼吸商(respiratory quotient,RQ)、碳水化合物(carbohydrate,CHO)、蛋白质(protein,PRO)和脂肪(FAT)的氧化率。结果酒精肝衰竭组RQ值显著低于乙肝肝衰竭组[(0.80±0.06)vs.(0.84±0.05),P=0.007]。同为疾病中期或死亡组,酒精肝衰竭组RQ值显著低于乙肝组[(0.78±0.05)vs.(0.83±0.05),(0.75±0.04)vs.(0.82±0.05),P均=0.001]。酒精肝衰竭组内,中期患者RQ显著低于早期[(0.78±0.05)vs.(0.83±0.05),P=0.007],死亡组RQ及CHO氧化率显著低于恢复组[(0.75±0.04)vs.(0.83±0.04),P=0.000;(25.82±13.04)%vs.(38.41±14.69)%,P=0.029],而FAT氧化率显著增高[(54.55±11.44)%vs.(40.29±14.53)%,P=0.011]。结论酒精肝衰竭患者REE与乙肝肝衰竭患者相似,均以FAT氧化供能为主、伴CHO利用障碍为代谢特点,并且随病情动态变化的趋势是一致的;酒精肝衰竭患者RQ值降低更加显著,RQ值与疾病严重程度和预后密切相关。合理的营养支持可降低营养不良的发生,改善预后。
