Molecular packing and morphological stability of dihydro-indeno[1,2-b]fluorenes in the context of their substitution pattern

The synthesis and structural characterization of a series of dihydroindeno[1,2-b]fluorene (IF) derivatives with various side chain substituents is reported.

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Structural Characterization of a Neutral Polysaccharide from Cucurbia moschata and Its Uptake Behaviors in Caco-2 Cells

Foods ◽

10.3390/foods10102357 ◽

2021 ◽

Vol 10 (10) ◽

pp. 2357

Author(s):

Fei Li ◽

Solju Pak ◽

Jing Zhao ◽

Yunlu Wei ◽

Yuyu Zhang ◽

...

Keyword(s):

Molecular Weight ◽

Endoplasmic Reticulum ◽

Structural Characterization ◽

Average Molecular Weight ◽

Cellular Level ◽

Side Chain ◽

Rational Basis ◽

Dose Dependent ◽

Branched Point

A neutral pumpkin polysaccharide (NPPc) was extracted from Cucurbia moschata and its structural characterization is performed. Moreover, uptake behaviors of an NPPC were investigated at the cellular level. The results showed that NPPc, an average molecular weight (Mw) of 9.023 kDa, was linear (1→4)-α-D-Glcp residues in the backbone, which branched point at O-6 position of (1→4,6)-α-D-Glcp. The side chain contained (1→6)-α-D-Glcp and terminal glucose. The cellular uptake kinetics results showed that the uptake of fluorescent-labeled NPPc was in time- and dose-dependent manners in Caco-2 cells. For subcellular localization of NPPc, it was accumulated in endoplasmic reticulum and mitochondrion. This study illustrates the characteristics on the uptake of NPPc and provides a rational basis for the exploration of polysaccharides absorption in intestinal epithelium.

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Structural characterization of the pectic polysaccharide rhamnogalacturonan II: evidence for the backbone location of the aceric acid-containing oligoglycosyl side chain

Carbohydrate Research ◽

10.1016/s0008-6215(00)00036-7 ◽

2000 ◽

Vol 326 (4) ◽

pp. 277-294 ◽

Cited By ~ 78

Author(s):

Stéphane Vidal ◽

Thierry Doco ◽

Pascale Williams ◽

Patrice Pellerin ◽

William S. York ◽

...

Keyword(s):

Structural Characterization ◽

Side Chain ◽

Pectic Polysaccharide ◽

Rhamnogalacturonan Ii

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Synthesis, polymerization and structural characterization of a novel liquid crystalline side-chain poly(vinyl ether) containing dicyanovinyl groups and displaying coexisting smectic phases

Macromolecular Chemistry and Physics ◽

10.1002/macp.1996.021970301 ◽

1996 ◽

Vol 197 (3) ◽

pp. 767-779 ◽

Cited By ~ 3

Author(s):

Mikael Trollsås ◽

Henrik Ihre ◽

Ulf W. Gedde ◽

Anders Hult

Keyword(s):

Vinyl Ether ◽

Structural Characterization ◽

Liquid Crystalline ◽

Side Chain ◽

Smectic Phases

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Structural characterization of the bagasse lignin pretreated using solid alkali

Nordic Pulp & Paper Research Journal ◽

10.1515/npprj-2019-0026 ◽

2019 ◽

Vol 34 (4) ◽

pp. 558-566 ◽

Cited By ~ 1

Author(s):

Qiulin Yang ◽

Dongsheng Wang ◽

Dan Huo ◽

Lu Lin ◽

Qiujuan Liu ◽

...

Keyword(s):

Double Bond ◽

Conversion Efficiency ◽

Structural Characterization ◽

Aromatic Compounds ◽

Structural Changes ◽

Para Position ◽

Side Chain ◽

Carboxyl Group ◽

Novel Structure

Abstract The pretreatment using solid alkali had a high delignification rate and could improve the followed conversion efficiency of the biomass. In the present work, the bagasse lignin was separated and pretreated using a solid alkali to discuss their structural changes. The results showed that the main basic structures S/S′/S′′, G/G′, and H had different reactivity, where only the H unit was a stable structure in the pretreatment. The phenolic structure of the lignin was easily degraded in the pretreatment, and the lignin without phenolic structure was difficult to be degraded. The P structure was a novel structure that generated in the pretreatment. Some monomeric aromatic compounds simulated lignin monomer were also pretreated by solid alkali, the result showed that the phenol structure with side chain on para-position, as well as the carboxyl group, eater linkage, and double bond on the side chain are easily reacted in the pretreatment.

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New ultrastructural findings about Borrelia burgdorferi by cryofixation, negative staining, thin sectioning and scanning techniques

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100160467 ◽

1990 ◽

Vol 48 (3) ◽

pp. 582-583

Author(s):

S. F. Hayes ◽

M. D. Corwin ◽

T. G. Schwan ◽

D. W. Dorward ◽

W. Burgdorfer

Keyword(s):

Lyme Disease ◽

Borrelia Burgdorferi ◽

Structural Characterization ◽

Negative Staining ◽

Low Speed ◽

Thin Sectioning ◽

Ultrastructural Findings

Characterization of Borrelia burgdorferi strains by means of negative staining EM has become an integral part of many studies related to the biology of the Lyme disease organism. However, relying solely upon negative staining to compare new isolates with prototype B31 or other borreliae is often unsatisfactory. To obtain more satisfactory results, we have relied upon a correlative approach encompassing a variety EM techniques, i.e., scanning for topographical features and cryotomy, negative staining and thin sectioning to provide a more complete structural characterization of B. burgdorferi.For characterization, isolates of B. burgdorferi were cultured in BSK II media from which they were removed by low speed centrifugation. The sedimented borrelia were carefully resuspended in stabilizing buffer so as to preserve their features for scanning and negative staining. Alternatively, others were prepared for conventional thin sectioning and for cryotomy using modified procedures. For thin sectioning, the fixative described by Ito, et al.

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