Synthesis of cross-linked N-(2-carboxybenzyl)chitosan pH sensitive polyelectrolyte and its use for drug controlled delivery

Replication-competent gamma-retrovirus Mo-MuLV expressing green fluorescent protein as efficient tool for screening of inhibitors of retroviruses that use heparan sulfate as primary cell receptor

“…N 2 hydroxy 3 methoxybenzyl N succinyl chito san was obtained from succinyl chitosan with the degree of substitution of 0.45 as a result of interaction with 2 hydroxy 3 methoxybenzaldehyde and subsequent recovery of the imine by sodium borohydride [10]. N 2 hydroxy 3 [(4 sulfophenyl)azo]benzyl chitosan was obtained from low molecular weight chitosan in two stages.…”

Synthesis of hyperpolarizable biomaterials at molecular level based on pyridinium–chitosan complexes

“…Degree of deacetylation (DD) was determined in 2% DCl Where I Ar is the integral value of the aromatic protons of pyridinium moieties, n is the number of aromatic protons and I H2-H6 represents the peak area of protons C2-C6 in the chitosan backbone. Alternatively, degrees of N-substitution were 50 calculated from relationships between aromatic protons and H-1 or H-2 obtaining as well DS 1 and DS 2 parameters. The obtained DS value (Table S1) did not disagree more than 0.6 respects to calculated from C2-C6.…”

“…Thus, absorbance peaks ratio A 1025 /A 1061 must be remained unchanged for N-substitution but not for Osubstitution. 50 Last band at 894 cm -1 was assigned to glucosidic 110 bond of chitosan backbone.…”

“…50 In modern-day, systems exhibiting nonlineal optical (NLO) properties have been developed for multiple applications including optical communication, laser harmonic generation or data storage. 24 To generate this kind of materials involving second and third-order optical nonlinearities, such as inorganic 55 salts (e.g.…”

Biodegradable Hydrogel as Delivery Vehicle for the Controlled Release of Pesticide

“…To characterize the hydrogels, the most common techniques used are water uptake [Lohakan et al, 2010;; mechanical properties [Baker et al, 2010;Jiang et al, 2010;Xu et al, 2010]; scanning electron microscopy (SEM) [Moura et al, 2009;Ferrer et al, 2010;Gao et al, 2010;Li et al, 2010;Zhao et al, 2010]; Fourier transform infrared (FTIR) spectroscopy [Kim et al, 2010;; nuclear magnetic resonance (NMR) [Yin et al, 2010]; differential scanning calorimetry (DSC) [Castelli et al, 2008;Rao et al, 2010]; thermogravimetric analysis (TGA) [Rodkate et al, 2010]; structural properties [Panic et al, 2010] through average molar mass between crosslinks (M c ), crosslink density (q), and number of elastically effective chains, completely included in a perfect network, per unit volume (V e ); and controlled release of drugs [Koutroumanis et al, 2010;Liu & Lin, 2010;Sajeesh et al, 2010;Tanigo et al, 2010]; and agrochemicals [Saraydin et al, 2000;Bajpai & Giri, 2003;Bajpai et al, 2006;Wang et al, 2007;Pourjavadi et al, 2009].…”