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Chemical and macromolecular characterisation of agar polymers from Gracilaria dura (C. Agardh) J. Agardh (Gracilariaceae, Rhodophyta)
Abstract Agar polymers were extracted with and without alkali pre-treatment from the red seaweed Gracilaria dura , growing in the northern Adriatic Sea. Chemical analysis combined with 1 H and 13 CExpand
Transverse relaxation mechanisms in articular cartilage.
The experiments revealed that the dominant T1rho and T2 relaxation mechanism at B0 < or = 3 T is a dipolar interaction due to slow anisotropic motion of water molecules in the collagen matrix. Expand
Structure and properties of agar from two unexploited agarophytes from Venezuela
The red seaweeds Gelidiella acerosa and Gracilaria mammillaris growing along the coast of Venezuela were investigated as potential economic sources of agar and galactan exhibited quite good properties, comparable to that of commercial agaroses. Expand
Articular cartilage repair in rabbits by using suspensions of allogenic chondrocytes in alginate.
Practical a complete repair of the defect was observed 4-6 months from the implant of the chondrocytes with the recovery of a normal tissue structure, and controls in which Ca-alginate alone was implanted developed only a fibrous cartilage. Expand
Investigation of the carrageenans extracted from Solieria filiformis and Agardhiella subulata from Mar Piccolo, Taranto
Abstract Dried samples of the red algae Solieria filiformis and Agardhiella subulata from Mar Piccolo, Taranto, were extracted by stirring in water at 25 (Cold), 85 (Hot) and 120 (pressure) °C. ForExpand
Investigation of laminar appearance of articular cartilage by means of magnetic resonance microscopy.
Dependence of T2 values on the orientation of specimens in the magnetic field as well as magnetization transfer experiments supported the previous suggestions about a significant role of dipolar interaction with protons of collagen in the laminar appearance of articular cartilage. Expand
Proteoglycan depletion and magnetic resonance parameters of articular cartilage.
Calcium ions and various amounts of proteoglycans were removed from porcine articular cartilage explants using ethylenediaminetetraacetic acid or guanidinium chloride solutions. The water protonExpand
NMR analysis of succinoglycans from different microbial sources: partial assignment of their 1H and 13C NMR spectra and location of the succinate and the acetate groups.
The NMR data showed that succinate is located on O-6 of either one or both of the two side chain 3-linked beta-D-Glc residues, whereas the acetate (when it is present), but the specific site could not be determined, and the spectral features of the succinate substituent were found to be sensitive to pH changes. Expand
Structure of the exopolysaccharide produced by Enterobacter amnigenus.
The bacterial species Enterobacter amnigenus was isolated from sugar beets harvested in Finland. It produced an exopolysaccharide rich in l-fucose, which gave viscous water solutions. Its primaryExpand
31P NMR analysis of phospholipids in crude extracts from different sources: improved efficiency of the solvent system
Crude lipid extracts from different tissues were analysed by 31P NMR spectroscopy in a mixture of triethylamine, dimethylformamide and guanidinium chloride. Higher dispersion of the 31P NMR signalsExpand