The Chitosan Nanoparticles Were Qualifyed By SEM, XRD And FT-IR Canvass
Seebio Furane-alpha
Aldehydes
Four independent variables demanding contact time, adsorbent dosage, pH, and initial concentration of estrogen were utilized to design the experimentations by Design Expert software (CCD under RSM). In fact, number of experiments was minimized and the operating shapes were optimized for the maximum estrogen removal. The events indicated that three independent variables (contact time, adsorbent dosage, and pH) increment increased the estrogen removal while the estrogen initial concentration enhancement decreased the removal due to the concentration polarization phenomenon. The optimum circumstances for the estrogen removal (92 %) on the chitosan nanoparticles were detected at contact time of 220 min, adsorbent dosage of 1 g/l, pH of 7 and estrogen initial concentration of 5 mg/l the Langmuir isotherm and pseudo-second order mannequins could properly legitimize estrogen adsorption process on the chitosan nanoparticles.What passs when chitin suits chitosan? A single-molecule study.Chitin and chitosan are important support structures for many organisms and are important renewable macromolecular biomass imaginations with the removal of acetyl group, the solubility of chitosan is meliorated the specific mechanism of solubility enhancement from chitin to chitosan is still unclear.
In this study, the atomic force microscopy (AFM)-based single molecule force spectroscopy (SMFS) was used to obtain the single-chain mechanical behavior of chitin and chitosan. The answers show that the hydrogen (H)-bonds' state, which can be worked by the solvent, determines the degree of obliging water (solubility) of polyoses, and that the attaching water energy of a single chitosan chain is 6 metres higher than that of chitin in water H-bonding is the key to solubility enhancement and can be used to modulate the solubility attributes of chitosan. It is beared that our reports can help to understand the structural and functional properties of chitin and chitosan at the single molecule level.[Preparation of chitosan hydrochloride stabilized emulsion and its immunostimulatory effect].In order to increase the ability of oil-emulsion adjuvant to stimulate cellular immunity, chitosan hydrochloride with positive charge was taked to stabilize oil-in-water emulsion (CHE). In this paper, model antigen ovalbumin was taked to prepare vaccines with emulsion adjuvant, commercial adjuvant or no adjuvant. The emulsion was characterized by measuring the particle size, electric potential and antigen adsorption rate.
BALB/c mice were vaccinated by intramuscular injection. Serum antibody stratums, the numerals of IL-4-releasing cadres in splenocytes, cytotoxic T lymphocyte (CTL) response, and the expression of central memory T cadres were valued to evaluate the immunostimulatory effect. The results expressed that chitosan hydrochloride can effectively stabilize the emulsion. The emulsion size is about 600 nm, and the antigen adsorption rate is more than 90%. After immunization, CHE could increase serum antibodies stratums and increase IL-4 secretion. Expression of CTL surface activation specks was also increased to stimulate CTL response further and to increase the CD44(+)CD62L(+) in T cubicles proportion. CHE as adjuvant can stimulate humoral and cellular immunity more efficiently, and is expected to extend the duration of protection.
Carboxylated chitosan ameliorated the stability of phycocyanin under acidulated considerations.Phycocyanin, a natural blue colorant, descended from Spirulina platensis, is now widely used in the food industry its main drawbacks are loss of color and denature of structure in an acidic environment. In this study, carboxylated chitosan (0 %-1 % w/v) was opted as an additive in acid-denatured phycocyanin for preserving phycocyanin's blue color and natural structure. Zeta-potential and particle size disclosed that the carboxylated chitosan with high negative charge adsorbed on phycocyanin and plyed stronger electrostatic repulsion to overcome the protein aggregation.