A5093066493- Polysaccharides and Plant Cell Walls
- Polysaccharides Composition and Applications
- Enhanced Oil Recovery Techniques
- Proteins in Food Systems
- Advanced Polymer Synthesis and Characterization
- Electrohydrodynamics and Fluid Dynamics
- Photoacoustic and Ultrasonic Imaging
- Nanocomposite Films for Food Packaging
- Surface Modification and Superhydrophobicity
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced Drug Delivery Systems
- Nanoplatforms for cancer theranostics
- Hydrogels: synthesis, properties, applications
Satbayev University
2024
Institute of Polymer Materials and Technologies
2023-2024
Abstract Commercial low acyl gellan (LAG) is purified by the fractional dissolution method. An aqueous solution of commercial LAG exhibits polyelectrolyte character due to its high molar mass and carboxylic groups in glucuronic acid fragments. The empirical Fuoss equation determines intrinsic viscosity salt‐less water. Fractionation carried out ultrasound treatment. fractions are characterized 1 H NMR FTIR spectroscopy. viscosities ultrasonically treated samples measured 0.025 m...
Preformed particle gels (PPGs) based on acrylamide (AAm), (3-acrylamidopropyl) trimethylammonium chloride (APTAC), and 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt (AMPS) were synthesized via conventional free radical copolymerization. The resultant PPGs of various compositions characterized using FTIR spectroscopy, TG DT analysis, mechanical testing. swelling behavior depending ionic strength, temperature, degree crosslinking, pH was also studied. obtained results show that the...
Abstract Photothermal therapy (PTT) is recognized as an effective tool for the treatment of cancer and it has attracted considerable attention scientists. In this work, gold nanospheres (AuNSs) nanorods (AuNRs) stabilized using poly( N ‐vinylpyrrolidone) (PVP), pristine gellan gum (PGG), poly(2‐ethyl‐2‐oxazoline)‐grafted (GG‐ g ‐PEtOx) are synthesized evaluated PTT agents in Ehrlich cells. The physicochemical characteristics these AuNSs AuNRs, including their surface plasmon resonance...
ABSTRACT Gellan gum (GG) emerges as a promising candidate for developing polymeric carriers with extended retention on the ocular surface, aiming to enhance efficacy of topical drug delivery systems. This study undertakes purification commercial GG through fractional dissolution and ultrasonic treatment, producing fractions characterized by 1 H, 13 C NMR, FTIR spectroscopy thermogravimetric analysis. The intrinsic viscosity samples was measured in 0.025 M tetramethylammonium chloride...
Abstract Composite hydrogels (CH) based on acrylamide (AAm), sodium acrylate (SA), and bentonite are prepared via free radical polymerization in the presence of cross‐linking agent— N , ‐methylene bisacrylamide (MBAA). As a result, series preformed particle gels (PPG) with different compositions obtained. The CH is characterized by FTIR, mechanical analysis. swelling behavior determined water brine salinity. influence monomer concentration, ratio bentonite/monomers, properties, degree studied.
Abstract Gellan gum prepared from the domestic raw materials of Kazakhstan is studied by methods 1 H NMR spectroscopy, FTIR, GPC, TGA, and compared with characteristics commercial gellan gum. Fermentation on glucose‐fructose syrup Zharkent Burunday corn starch plants (Kazakhstan) Sphingomonas paucimobilis ATCC 31461 produces a biomass containing high acyl (HAG). The average molecular weights, M w , n z polydispersity index (PDI) HAG are determined GPC. Low (LAG) obtained treatment alkaline...
ABSTRACT Polysaccharides such as chitosan (Ch) and gellan gum (GG) were chemically modified to produce water–soluble amphoteric polyelectrolytes. These derivatives synthesized via carboxymethylation quaternization reactions characterized using techniques including 1 H NMR, FTIR spectroscopies, elemental analysis, potentiometric titration, thermogravimetric analysis (TGA). The degree of (QGG) with trimethylammonium groups was determined be ~38% by NMR spectroscopy; ~35% based on ~39%...