Polyethylene glycol functional chain compounds can modify the surface of proteins or substances and are used in the study of covalent macromolecule proteins, serving as connecting arms while enhancing the functional properties of proteins. For example: Adding polyethylene glycol to the protein modification improves the water solubility of the protein,...

In addition to the four common bases, DNA also has various chemical modifications, such as cytosine methylation modification, hydroxymethylation modification, aldehyde modification, adenine methylation modification, etc.Deoxyuracil (dU) is a DNA modified base, which can be formed from cytosine-amidamidine under the action of deaminase or from the misincorporation of dUMP during...

Polysulfamide is a linear polymer with selective metal (palladium) adsorption capacity. The research group of Professor Yi Wenbin of Nanjing University of Science and Technology has developed a general method for preparing polysulfamide using secondary amines, and uses palladium to assist the synthesis of polysulfamide. A palladium-crosslinked polysulfamide skeleton metal...

First row transition metal catalysts show potential as cheaper, more abundant alternatives to their second and third row counterparts. However, catalysis with first-row transition metal systems is frequently hampered by low turnover and sensitivity to catalyst poisoning, often necessitating higher catalyst loadings. Applying first row transition metals to reactions such...

J&K Scientific provides a series of phosphonate rare earth extractants (P227, C272, P507) developed by Professor Xiao Jichang from Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences. Compared with industrial grade (purity of about 90%), high-purity rare earth extractants (purity of 95-99%) are more effective in the separation of...

Alkynylamide condensation reagents (Figure 1) are a type of reagent with a new structure developed by Professor Zhao Junfeng's research group and are used for the direct condensation of acids and amines. They are characterized by moderate activity and can effectively avoid the activation of the α-position chiral center of...