研究了N902/煤油从氨/氯化铵水溶液中萃取铜.考察了萃取时间、水相pH值、萃取剂浓度、温度等对萃取率的影响,以及酸度和时间对铜的反萃率的影响.实验发现,在研究的条件下萃取5 m in达到平衡,而反萃则需要15 m in达到平衡.萃取过程是吸...研究了N902/煤油从氨/氯化铵水溶液中萃取铜.考察了萃取时间、水相pH值、萃取剂浓度、温度等对萃取率的影响,以及酸度和时间对铜的反萃率的影响.实验发现,在研究的条件下萃取5 m in达到平衡,而反萃则需要15 m in达到平衡.萃取过程是吸热过程,测得△H=4.0 kJ/mol.在实验范围内,萃取率先随pH值增大而增加,当pH值超过10.2后,随着pH值增大反而降低.展开更多
Plants employ receptor-like kinases (RLKs)and receptor-like proteins for rapid recognition of invading pathogens,and RLKs then transmit signals to receptor-like cytoplasmic kinases (RLCKs)to activate immune responses....Plants employ receptor-like kinases (RLKs)and receptor-like proteins for rapid recognition of invading pathogens,and RLKs then transmit signals to receptor-like cytoplasmic kinases (RLCKs)to activate immune responses.RLKs are under fine regulation mediated by subcellular trafficking,which contributes to proper activation of plant immunity.In this study,we show that Arabidopsisthaliana RECEPTOR-LIKE KINASE 902 (RLK902)plays important roles in resistance to the bacterial pathogen Pseudomonas syringae, but not to the fungal powdery mildew pathogen Golovinomyces cichoracearum.RLK902 localizes at the plasma membrane and associates with ENHANCED DISEASE RESISTANCE 4 (EDR4),a protein involved in clathrin-mediated trafficking pathways.EDR4 and CLATHRIN HEAVY CHAIN 2 (CHC2)regulate the subcellular trafficking and accumulation of RLK902 protein.Furthermore,we found that RLKg02 directly associates with the RLCK BRASSINOSTEROID-SIGNALING KINASE1 (BSK1),a key component of plant immunity,but not with other members of the FLAGELLIN SENSING 2 immune complex.RLK902 phosphorylates BSK1,and its Ser-230 is a key phosphorylation site critical for RLK902-mediated defense signaling. Taken together,our data indicate that EDR4 regulates plant immunity by modulating the subcellular trafficking and protein accumulation of RLK902,and that RLK902 transmits immune signals by phosphorylating BSK1.展开更多
用N902和AD100两种萃取剂分别分离萃取废锂离子电池浸出液中的铜,考察了初始p H值、萃取剂浓度、相比(O/A)和萃取时间对铜回收率的影响.结果表明,室温下,在初始p H 3.0、萃取剂浓度20%(?)及O/A=1:1、萃取时间240 s的条件下,N902对铜的...用N902和AD100两种萃取剂分别分离萃取废锂离子电池浸出液中的铜,考察了初始p H值、萃取剂浓度、相比(O/A)和萃取时间对铜回收率的影响.结果表明,室温下,在初始p H 3.0、萃取剂浓度20%(?)及O/A=1:1、萃取时间240 s的条件下,N902对铜的一级萃取率达98.3%;在初始p H 3.0、萃取剂浓度25%(?)及O/A=1:1、萃取时间180 s的条件下,AD100对铜的一级萃取率达97.1%.经硫酸溶液反萃后,2种萃取剂一次反萃率均高于95%,均能高效萃取分离铜,效果接近.展开更多
文摘研究了N902/煤油从氨/氯化铵水溶液中萃取铜.考察了萃取时间、水相pH值、萃取剂浓度、温度等对萃取率的影响,以及酸度和时间对铜的反萃率的影响.实验发现,在研究的条件下萃取5 m in达到平衡,而反萃则需要15 m in达到平衡.萃取过程是吸热过程,测得△H=4.0 kJ/mol.在实验范围内,萃取率先随pH值增大而增加,当pH值超过10.2后,随着pH值增大反而降低.
文摘Plants employ receptor-like kinases (RLKs)and receptor-like proteins for rapid recognition of invading pathogens,and RLKs then transmit signals to receptor-like cytoplasmic kinases (RLCKs)to activate immune responses.RLKs are under fine regulation mediated by subcellular trafficking,which contributes to proper activation of plant immunity.In this study,we show that Arabidopsisthaliana RECEPTOR-LIKE KINASE 902 (RLK902)plays important roles in resistance to the bacterial pathogen Pseudomonas syringae, but not to the fungal powdery mildew pathogen Golovinomyces cichoracearum.RLK902 localizes at the plasma membrane and associates with ENHANCED DISEASE RESISTANCE 4 (EDR4),a protein involved in clathrin-mediated trafficking pathways.EDR4 and CLATHRIN HEAVY CHAIN 2 (CHC2)regulate the subcellular trafficking and accumulation of RLK902 protein.Furthermore,we found that RLKg02 directly associates with the RLCK BRASSINOSTEROID-SIGNALING KINASE1 (BSK1),a key component of plant immunity,but not with other members of the FLAGELLIN SENSING 2 immune complex.RLK902 phosphorylates BSK1,and its Ser-230 is a key phosphorylation site critical for RLK902-mediated defense signaling. Taken together,our data indicate that EDR4 regulates plant immunity by modulating the subcellular trafficking and protein accumulation of RLK902,and that RLK902 transmits immune signals by phosphorylating BSK1.
文摘用N902和AD100两种萃取剂分别分离萃取废锂离子电池浸出液中的铜,考察了初始p H值、萃取剂浓度、相比(O/A)和萃取时间对铜回收率的影响.结果表明,室温下,在初始p H 3.0、萃取剂浓度20%(?)及O/A=1:1、萃取时间240 s的条件下,N902对铜的一级萃取率达98.3%;在初始p H 3.0、萃取剂浓度25%(?)及O/A=1:1、萃取时间180 s的条件下,AD100对铜的一级萃取率达97.1%.经硫酸溶液反萃后,2种萃取剂一次反萃率均高于95%,均能高效萃取分离铜,效果接近.
