β-1,3-<scp>d</scp>-Glucan Schizophyllan/Poly(dA) Triple-Helical Complex in Dilute Solution

Sanada, Yusuke; Matsuzaki, Tsubasa; Mochizuki, Seibu; Okobira, Tadashi; Uezu, Kazuya; Sakurai, Kazuo

doi:10.1021/jp209027u

Cited by 46 publications

(41 citation statements)

References 32 publications

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“…Incorporation of polynucleotides into hetero‐triple helices was reported, with high selectivity for polynucleotides such as poly(cytidylic acid) and poly(deoxyadenylic acid) (respectively poly(C) and poly(dA)). A well‐defined stoichiometric ratio (two polysaccharides per polynucleotide) was obtained …”

Section: Helical Stabilizationmentioning

confidence: 99%

Helical polysaccharides

2019

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In analogy to polypeptides and polynucleotides, polysaccharides tend to form helical secondary structures, as well as higher hierarchical assemblies. Nevertheless, the conformation of polysaccharides in solution remains in most cases elusive due to their intrinsic complexity and lack of analytical techniques. In this review, we discuss the different helical shapes adopted by polysaccharides, with particular focus on how the helical character is exploited to form supramolecular assemblies, such as inclusion complexes with linear guest molecules and co‐helices with polynucleotide strands. Several methodologies are used to tune the polysaccharides conformation, ranging from ion‐mediated coil‐helix transition to chemical synthesis of well‐defined compounds with specific modifications. The latter provides ideal tailor‐made probes for structural studies, with the aim to correlate their three‐dimensional structure and the macroscopic properties. Applications of oligosaccharides with defined shapes in molecular recognition and catalysis are envisioned.

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Section: Helical Stabilizationmentioning

confidence: 99%

Helical polysaccharides

2019

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“…2 and S1). In all the TEM micrographs, the folded structures (globule structure) 23 with a length of approximately 50-100 nm and a diameter of approximately 20 nm were abundant (Figs. 2C, 2D and S1).…”

Section: Morphology and Characteristics Of β-13-glucan-complexed C 70mentioning

confidence: 99%

Formation of β-(1,3-1,6)-d-glucan-complexed [70]fullerene and its photodynamic activity towards macrophages

et al. 2017

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[70]Fullerene was dissolved in water by complexation with β-1,3-glucan using a mechanochemical high-speed vibration milling apparatus. The photodynamic activity of β-1,3-glucan-complexed C was highly dependent on the expression level of dectin-1 on the cell surfaces of macrophages. The photodynamic activity increased as a result of a synergistic effect between β-1,3-glucan-complexed 1'-acetoxychavicol acetate and the C complex.

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“…In contrast to scleroglucan, which has been theoretically analyzed using an exponential model, the rheological properties of schizophyllan have been shown to exhibit the same behaviour as xanthan gum (pseudoplastic with shear-thinning characterized using a power-law model) [ 48 ]. According to existing studies [ 52 , 53 ], rheological data indicate that biopolymer concentration is vital, wherein low concentration, the solution of SPG behaves as a viscoelastic material, while at high concentration, it maintains a solid-like state.…”

Section: Polyacrylamides and Polysaccharidesmentioning

confidence: 99%

Comparative Study of Green and Synthetic Polymers for Enhanced Oil Recovery

et al. 2020

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Several publications by authors in the field of petrochemical engineering have examined the use of chemically enhanced oil recovery (CEOR) technology, with a specific interest in polymer flooding. Most observations thus far in this field have been based on the application of certain chemicals and/or physical properties within this technique regarding the production of 50–60% trapped (residual) oil in a reservoir. However, there is limited information within the literature about the combined effects of this process on whole properties (physical and chemical). Accordingly, in this work, we present a clear distinction between the use of xanthan gum (XG) and hydrolyzed polyacrylamide (HPAM) as a polymer flood, serving as a background for future studies. XG and HPAM have been chosen for this study because of their wide acceptance in relation to EOR processes. To this degree, the combined effect of a polymer’s rheological properties, retention, inaccessible pore volume (PV), permeability reduction, polymer mobility, the effects of salinity and temperature, and costs are all investigated in this study. Further, the generic screening and design criteria for a polymer flood with emphasis on XG and HPAM are explained. Finally, a comparative study on the conditions for laboratory (experimental), pilot-scale, and field-scale application is presented.

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β-1,3-d-Glucan Schizophyllan/Poly(dA) Triple-Helical Complex in Dilute Solution

Cited by 46 publications

References 32 publications

Helical polysaccharides

Helical polysaccharides

Formation of β-(1,3-1,6)-d-glucan-complexed [70]fullerene and its photodynamic activity towards macrophages

Comparative Study of Green and Synthetic Polymers for Enhanced Oil Recovery

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