采用浸渍法制备了系列H_(3)PMo_(12)O_(40)/ZSM-5分子筛催化剂,并利用XRD、FT-IR、SEM和EDS等方法对催化剂的结构和表面形貌进行表征。在甲醇溶剂中,对H_(3)PMo_(12)O_(40)/ZSM-5分子筛催化生物质基平台化合物5-羟甲基糠醛(HMF)一锅法...采用浸渍法制备了系列H_(3)PMo_(12)O_(40)/ZSM-5分子筛催化剂,并利用XRD、FT-IR、SEM和EDS等方法对催化剂的结构和表面形貌进行表征。在甲醇溶剂中,对H_(3)PMo_(12)O_(40)/ZSM-5分子筛催化生物质基平台化合物5-羟甲基糠醛(HMF)一锅法制备下游化学品丁二酸二甲酯(DMS)进行了研究,考察了反应温度、时间、催化剂用量和氧气压力对DMS产率的影响,并研究了催化剂的重复使用性能。研究结果表明:H_(3)PMo_(12)O_(40)的Keggin结构和ZSM-5的骨架结构在负载前后保持不变,H_(3)PMo_(12)O_(40)在ZSM-5分子筛载体上均匀分散;在0.5 g HMF、10 mL甲醇、0.3 g 30%-H_(3)PMo_(12)O_(40)/ZSM-5催化剂和3 MPa O 2的条件下,在90℃下反应4 h时DMS产率可达到42.13%。该催化剂循环使用1~2次时,DMS产率仅略有下降,具有良好的重复使用性能,且在其他生物质基化学品制备DMS过程中也具有开发潜力。展开更多
Objective C1q/TNF-related protein(CTRP)1 was initiallyidentified as a paralog of adiponectin based on the similarity in C1q domain of these two proteins.Previously,we showed that CTRP1promotes the development of ather...Objective C1q/TNF-related protein(CTRP)1 was initiallyidentified as a paralog of adiponectin based on the similarity in C1q domain of these two proteins.Previously,we showed that CTRP1promotes the development of atherosclerosis by increasing endothelial adhesiveness.Here,we sought to investigate whether CTRP1 also influences vascular dilatory functions.展开更多
文摘采用浸渍法制备了系列H_(3)PMo_(12)O_(40)/ZSM-5分子筛催化剂,并利用XRD、FT-IR、SEM和EDS等方法对催化剂的结构和表面形貌进行表征。在甲醇溶剂中,对H_(3)PMo_(12)O_(40)/ZSM-5分子筛催化生物质基平台化合物5-羟甲基糠醛(HMF)一锅法制备下游化学品丁二酸二甲酯(DMS)进行了研究,考察了反应温度、时间、催化剂用量和氧气压力对DMS产率的影响,并研究了催化剂的重复使用性能。研究结果表明:H_(3)PMo_(12)O_(40)的Keggin结构和ZSM-5的骨架结构在负载前后保持不变,H_(3)PMo_(12)O_(40)在ZSM-5分子筛载体上均匀分散;在0.5 g HMF、10 mL甲醇、0.3 g 30%-H_(3)PMo_(12)O_(40)/ZSM-5催化剂和3 MPa O 2的条件下,在90℃下反应4 h时DMS产率可达到42.13%。该催化剂循环使用1~2次时,DMS产率仅略有下降,具有良好的重复使用性能,且在其他生物质基化学品制备DMS过程中也具有开发潜力。
文摘Objective C1q/TNF-related protein(CTRP)1 was initiallyidentified as a paralog of adiponectin based on the similarity in C1q domain of these two proteins.Previously,we showed that CTRP1promotes the development of atherosclerosis by increasing endothelial adhesiveness.Here,we sought to investigate whether CTRP1 also influences vascular dilatory functions.
