The hydrophilic-lipophilic balance (HLB) polymers are able to directly extract polar and non-polar analytes from the aqueous samples, making them very popular for analytical separation SPE applications. However, commonly used suspension polymerization method preparing HLB is only efficiently prepare with low or medium mol percentages of hydrophilic monomer due partitioning into phase at higher ...

The growth mechanism from pentatwinned (PTW) gold nanorods into truncated quasi-decahedral particles when a gold salt (HAuCl₄) is reduced by N, N-dimethylformamide (DMF) in the presence of poly(vinylpyrrolidone), was elucidated through a combination of different techniques, including transmission and scanning electron microscopy, high resolution TEM and selected area electron diffraction. Parti...

The vibrational spectra of platinum nanoparticles (2.4-9 nm) capped with poly(N-vinylpyrrolidone) (PVP) were investigated by deep UV-Raman and FTIR spectroscopy and compared with those of pure PVP. Raman spectra of PVP/Pt show selective enhancement of C=O, C-N, and CH2 vibrational modes attributed to the pyrrolidone ring. Selective enhancement of ring vibrations is attributed both to the resona...

Synthesis of NS1 and NS2 peptide fragment hepatitis C virus polyprotein was carried out on a terpolymer- polystyrene, N-vinylpyrrolidone, 1,6-hexanediol diacrylate resin (PS-NVP-HDDA). The radical aqueous suspension polymerisation resulted in the resin, that exhibited high swelling capacity various solvents. peptides were synthesized step-wise by Fmoc strategy, established with amino acid analy...