Objective To investigate the prevalence of peripheral arterial disease (PAD) in China type 2 diabetic patients and to demonstrate the relationships between putative risk factors and PAD. Methods In total 1 397 type 2 ...Objective To investigate the prevalence of peripheral arterial disease (PAD) in China type 2 diabetic patients and to demonstrate the relationships between putative risk factors and PAD. Methods In total 1 397 type 2 diabetic patients aged 50 years and older were enrolled and determined ankle-brachial index (ABI) and brachial-ankle pulse wave velocity (baPWV) in 15 Class III Grade A hospitals in 7 major cities of China. Results Mean patient age was 63.7±8.2 years and mean duration of diabetes mellitus was 9.39±7.4 years. Two hundreds and seventy-two (19.47%) patients were diagnosed as PAD by ABI <0.9, 122 (18.37%) in male and 150 (20.46%) in female. PAD patients had a significantly longer duration of diabetes mellitus, higher hemoglobin Alc, and a significantly lower mean body mass index than non-PAD ones. Aging, smoking, and systolic blood pressure were found to be positively related with the prevalence of PAD. In terms of lipid profiles, no variable was found to relate with PAD. Notably, baPWV showed as the same significant guiding index for PAD, almost matched with ABI. Conclusions PAD is a common complication in China type 2 diabetic patients. Therefore, PAD screening and treatment should be emphasized for diabetic patients with high risk factors.展开更多
本研究利用亚临界水提取、可见分光光度法测定总黄酮含量及其抗氧化活性,并利用响应面法优化了怀菊花中总黄酮的亚临界水提取工艺。首先进行了单因素实验,然后在单因素实验基础上,选择提取温度、提取时间及液固比为自变量,以总黄酮提取...本研究利用亚临界水提取、可见分光光度法测定总黄酮含量及其抗氧化活性,并利用响应面法优化了怀菊花中总黄酮的亚临界水提取工艺。首先进行了单因素实验,然后在单因素实验基础上,选择提取温度、提取时间及液固比为自变量,以总黄酮提取量为响应值,采用Box-Benhnken法设计3因素3水平响应面设计实验,得出最佳工艺:提取温度130℃、提取时间46 min、液固比44∶1 m L/g,总黄酮实际提取量为(71.796±0.24)mg/g,与预测值71.806 mg/g无显著差异。结果表明,怀菊花中的总黄酮有一定的抗氧化活性,并且其含量与抗氧化活性具有一致性。展开更多
目的探讨应用3.0 T磁共振动态增强(MRI-DCE)及扩散加权成像(DWI)诊断浸润性乳腺癌腋窝淋巴结(ALN)转移的价值。方法我院收治的143例早期浸润性乳腺癌患者,均接受MRI-DCE及DWI评估ALN转移情况,分析两者在ALN转移中诊断价值。结果以病理...目的探讨应用3.0 T磁共振动态增强(MRI-DCE)及扩散加权成像(DWI)诊断浸润性乳腺癌腋窝淋巴结(ALN)转移的价值。方法我院收治的143例早期浸润性乳腺癌患者,均接受MRI-DCE及DWI评估ALN转移情况,分析两者在ALN转移中诊断价值。结果以病理诊断为金标准,MRI-DCE联合DWI诊断ALN灵敏度、特异度、阳性预测值与阴性预测值分别为94.59%、96.23%、89.74%与98.08%;ALN转移与无ALN转移患者边界、早期强化模式、DWI信号、长径、短径、早期强化率、最大强化率、皮质厚度、表观扩散系数(ADC)值等MRI表现比较,差异有统计学意义(P<0.05);DWI高信号、短径及ADC值是ALN转移的影响因素(P<0.05);DWI信号、短径及ADC值诊断ALN转移曲线下面积(AUC)为0.619、0.745、0.734,各指标联合诊断ALN转移AUC值为0.835。结论3.0 T MR动态增强及扩散加权成像可以有效检出早期浸润性乳腺癌ALN转移,测定DWI信号、短径及ADC值联合有助于提高患者ALN转移诊断价值。展开更多
A biodegradable blend foaming material of poly(butylene adipate-co-terephthalate)(PBAT)/poly(propylene carbonate)(PPC)was successfully prepared by chemical foaming agent and screw extrusion method.First,PBAT was modif...A biodegradable blend foaming material of poly(butylene adipate-co-terephthalate)(PBAT)/poly(propylene carbonate)(PPC)was successfully prepared by chemical foaming agent and screw extrusion method.First,PBAT was modified by bis(tert-butyl dioxy isopropyl)benzene(BIBP)for chain extension,and then the extended PBAT(E-PBAT)was foamed with PPC using a twin(single)screw extruder.By analyzing the properties of the blends,we found that Young’s modulus increased from 58.8 MPa of E-PBAT to 244.7 MPa of E-PBAT/PPC 50/50.The viscosity of the polymer has a critical influence on the formation of cells.Compared with neat PBAT(N-PBAT),the viscosity of E-PBAT increased by 3396 Pa·s and E-PBAT/PPC 50/50 increased by 8836 Pa·s.Meanwhile,the dynamic mechanical analysis(DMA)results showed that the storage modulus(E’)at room temperature increased from 538 MPa to 1650 MPa.The various phase morphologies(“sea-island”,“quasi-co-continuous”and“cocontinuous”)and crystallinity of the blends affected the spread velocity of gas and further affected the foaming morphology in E-PBAT/PPC foam.Therefore,through the analysis of phase morphology and foaming mechanism,we concluded that the E-PBAT/PPC 70/30 component has both excellent strength and the best foaming performance.展开更多
文摘Objective To investigate the prevalence of peripheral arterial disease (PAD) in China type 2 diabetic patients and to demonstrate the relationships between putative risk factors and PAD. Methods In total 1 397 type 2 diabetic patients aged 50 years and older were enrolled and determined ankle-brachial index (ABI) and brachial-ankle pulse wave velocity (baPWV) in 15 Class III Grade A hospitals in 7 major cities of China. Results Mean patient age was 63.7±8.2 years and mean duration of diabetes mellitus was 9.39±7.4 years. Two hundreds and seventy-two (19.47%) patients were diagnosed as PAD by ABI <0.9, 122 (18.37%) in male and 150 (20.46%) in female. PAD patients had a significantly longer duration of diabetes mellitus, higher hemoglobin Alc, and a significantly lower mean body mass index than non-PAD ones. Aging, smoking, and systolic blood pressure were found to be positively related with the prevalence of PAD. In terms of lipid profiles, no variable was found to relate with PAD. Notably, baPWV showed as the same significant guiding index for PAD, almost matched with ABI. Conclusions PAD is a common complication in China type 2 diabetic patients. Therefore, PAD screening and treatment should be emphasized for diabetic patients with high risk factors.
文摘本研究利用亚临界水提取、可见分光光度法测定总黄酮含量及其抗氧化活性,并利用响应面法优化了怀菊花中总黄酮的亚临界水提取工艺。首先进行了单因素实验,然后在单因素实验基础上,选择提取温度、提取时间及液固比为自变量,以总黄酮提取量为响应值,采用Box-Benhnken法设计3因素3水平响应面设计实验,得出最佳工艺:提取温度130℃、提取时间46 min、液固比44∶1 m L/g,总黄酮实际提取量为(71.796±0.24)mg/g,与预测值71.806 mg/g无显著差异。结果表明,怀菊花中的总黄酮有一定的抗氧化活性,并且其含量与抗氧化活性具有一致性。
文摘目的探讨应用3.0 T磁共振动态增强(MRI-DCE)及扩散加权成像(DWI)诊断浸润性乳腺癌腋窝淋巴结(ALN)转移的价值。方法我院收治的143例早期浸润性乳腺癌患者,均接受MRI-DCE及DWI评估ALN转移情况,分析两者在ALN转移中诊断价值。结果以病理诊断为金标准,MRI-DCE联合DWI诊断ALN灵敏度、特异度、阳性预测值与阴性预测值分别为94.59%、96.23%、89.74%与98.08%;ALN转移与无ALN转移患者边界、早期强化模式、DWI信号、长径、短径、早期强化率、最大强化率、皮质厚度、表观扩散系数(ADC)值等MRI表现比较,差异有统计学意义(P<0.05);DWI高信号、短径及ADC值是ALN转移的影响因素(P<0.05);DWI信号、短径及ADC值诊断ALN转移曲线下面积(AUC)为0.619、0.745、0.734,各指标联合诊断ALN转移AUC值为0.835。结论3.0 T MR动态增强及扩散加权成像可以有效检出早期浸润性乳腺癌ALN转移,测定DWI信号、短径及ADC值联合有助于提高患者ALN转移诊断价值。
基金financially supported by the National Key Research and Development Program of China(No.2016YFC0501402)Science and Technology Services Network Program of Chinese Science Academy(STS Project)(No.KFJSTS-ZDTP-082)Chinese Academy of Sciences(Changchun Branch)(Nos.2020SYHZ0002 and No.2020SYHZ0047)。
文摘A biodegradable blend foaming material of poly(butylene adipate-co-terephthalate)(PBAT)/poly(propylene carbonate)(PPC)was successfully prepared by chemical foaming agent and screw extrusion method.First,PBAT was modified by bis(tert-butyl dioxy isopropyl)benzene(BIBP)for chain extension,and then the extended PBAT(E-PBAT)was foamed with PPC using a twin(single)screw extruder.By analyzing the properties of the blends,we found that Young’s modulus increased from 58.8 MPa of E-PBAT to 244.7 MPa of E-PBAT/PPC 50/50.The viscosity of the polymer has a critical influence on the formation of cells.Compared with neat PBAT(N-PBAT),the viscosity of E-PBAT increased by 3396 Pa·s and E-PBAT/PPC 50/50 increased by 8836 Pa·s.Meanwhile,the dynamic mechanical analysis(DMA)results showed that the storage modulus(E’)at room temperature increased from 538 MPa to 1650 MPa.The various phase morphologies(“sea-island”,“quasi-co-continuous”and“cocontinuous”)and crystallinity of the blends affected the spread velocity of gas and further affected the foaming morphology in E-PBAT/PPC foam.Therefore,through the analysis of phase morphology and foaming mechanism,we concluded that the E-PBAT/PPC 70/30 component has both excellent strength and the best foaming performance.
