The effects of sulfation of yeast glucans was optimized using response surface methodology. The degree of sulfation was evaluated from 0.11 to 0.75 using ion-chromatography. The structural characteristics of SYG (sulfation of yeast glucans) with a DS = 0.75 were determined using high-performance liquid chromatography/gel-permeation chromatography and finally by Fourier transform infrared spectr...

Triptycenes with their predefined D3h-symmetry are excellent molecular building blocks to construct shape-persistent nanobelts having ?-orbitals orthogonal the ring plane. However, up now, there only a very few examples of fused and rigid iptycene synthesized in several consecutive steps overall yields below 1 %. Here we present simple one-step one-pot approach an nanobelt, which forms >2 % can...

Opuntia dillenii (Ker Gawl.) Haw., a well-known member of the Cactaceae family, played an important role in agriculture and medicine. In this study, extraction conditions physico-chemical properties water-soluble polysaccharides (OMP) from mucilage were investigated. The cactus cladodes used study collected Binh Thuan province, Vietnam. optimum water with conventional heating included at temper...

Asphalt aging is one of the main causes asphalt pavement cracking, loosening and other issues. On a macro level, hardens becomes more brittle, while on micro chemical composition molecular weight distribution change. This very complicated physicochemical process. Gel permeation chromatography (GPC) powerful technical tool for understanding mechanism expressing GPC can be used to measure content...

Two polysaccharides (APS-I and APS-II) were isolated from the water extract of Radix Astragali and purified through ethanol precipitation, deproteination and by ion-exchange and gel-filtration chromatography. Their molecular weight was determined using high performance liquid chromatography and gel permeation chromatography (HPLC-GPC) and their monosaccharide composition was analyzed by TLC and...

1. The human thymus-brain antigen, which corresponds to the murine (mouse or rat) Thy1 antigen complex, was isolated from brain after solubilization in deoxycholate by gel-permeation chromatography, wheat-germ-lectin affinity chromatography and ionexchange chromatography. 2. The isolated antigen is a glycoprotein displaying an apparent molecular weight of 26000-29000 in sodium dodecyl sulphate/...