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            Hi there, I have a polyelectrolyte polyethylenimine (PEI) grafted with DSPE-PEG (lipid-polyethylene glycol). I have some...                
        
        
        
        
        
            
            
                Posted:
                
leosiu
                1 
                Apr 24 '12 at 13:13
            
         
        
        
        
        
     
    
    
        
        
            
                
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            I need to run NMR on samples of anhydrous ammonia.  The boiling point of anhydrous ammonia is -33.34 deg C.  In order to...                
        
        
        
        
        
        
        
        
        
     
    
    
        
        
            
                
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            When pursuing an NMR structure project - at what size of oligopeptide you would decide to label it with:
15N
13C
both
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            Our coil area length is 16 mm. Should we be making samples exactly 16 mm long in the Shigemi tubes for the best sensitiv...