Recent advances in the textural characterization of hierarchically structured nanoporous materials

2017 ◽  
Vol 46 (2) ◽  
pp. 389-414 ◽  
Author(s):  
Katie A. Cychosz ◽  
Rémy Guillet-Nicolas ◽  
Javier García-Martínez ◽  
Matthias Thommes
Keyword(s):  
Structural Characterization ◽  
Nanoporous Materials ◽  
Hierarchical Materials ◽  
Mesoporous Zeolites ◽  
Recent Advances ◽  
Textural Characterization

This review focuses on important aspects of applying physisorption for the pore structural characterization of hierarchical materials such as mesoporous zeolites.

scholarly journals Structural Characterization of Proteins Adsorbed at Nanoporous Materials

2021 ◽  
Vol 37 (1) ◽  
pp. 49-59
Author(s):  
Akira YAMAGUCHI ◽  
Masahiro SAIGA ◽  
Daiki INABA ◽  
Mami AIZAWA ◽  
Yuta SHIBUYA ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Nanoporous Materials

Textural Characterization of Mesoporous Zeolites

2010 ◽  
pp. 237-282 ◽  
Author(s):  
Lei Zhang ◽  
Adri N. C. van Laak ◽  
Petra E. de Jongh ◽  
Krijn P. de Jong
Keyword(s):  
Mesoporous Zeolites ◽  
Textural Characterization

scholarly journals APLICAÇÃO DE CARVÃO ATIVADO IMPREGNADO COM ÍONS DE ZINCO PARA REMOÇÃO DE CISTOS DE GIARDIA SPP.

e-xacta ◽  
2013 ◽  
Vol 6 (1) ◽  
pp. 145
Author(s):  
Quelen Letícia Shimabuku ◽  
Flávia Sayuri Arakawa ◽  
Franciele Camacho ◽  
Letícia Nishi ◽  
Carole Silveira ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Specific Surface ◽  
Structural Characterization ◽  
Activated Charcoal ◽  
Protozoan Parasite ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bet Specific Surface Area ◽  
Textural Characterization

<p align="justify">Este trabalho teve como objetivo o estudo de filtros de carvão ativado impregnado com zinco para remoção do protozoário parasita Giardia. Para a impregnação dos íons metálicos na superfície do carvão ativado foi utilizado o método de impregnação por excesso de solvente, para a caracterização textural do material produzido foram analisados os parâmetros: área superficial específica BET, área de microporos (método t), volume e diâmetro de microporos (método HK). A caracterização estrutural foi feita através de medidas de Difração de Raios-X (DRX). Os filtros de carvão ativado impregnado com zinco foram testados com água sintética (água deionizada contaminadas com cistos de Giardia, em uma concentração na ordem de 105 cistos/L). Os resultados desse trabalho mostraram que filtros de carvão ativado impregnados com zinco atingiram uma remoção de aproximadamente 100%, trazendo resultados promissores na remoção do protozoário parasita Giardia.</p><p align="justify">Abstract</p><p align="justify">This work aimed to study the activated carbon filters impregnated with zinc for removal of protozoan parasite Giardia. For impregnation of the metal ions on the surface of activated charcoal was used the method of impregnation by excess of solvent, for textural characterization of the materials produced were analyzed parameters: BET specific surface area, area of micropores (method t), diameter and volume micropores (HK method). Structural characterization was made through measurements of X-ray diffraction (XRD). The activated carbon filters impregnated with zinc were tested with synthetic water (water contaminated with Giardia cysts, with a concentration on the order of 105 cysts / L). The results of this study showed that activated carbon filters impregnated with zinc reached a removal of approximately 100%, bringing promising results in the removal of the protozoan parasite Giardia.</p>

Recent Advances in Structural Characterization of Natural Rubber

2009 ◽  
Vol 82 (3) ◽  
pp. 283-314 ◽  
Author(s):  
Yasuyuki Tanaka ◽  
Lucksanaporn Tarachiwin
Keyword(s):  
Structural Characterization ◽  
Micelle Formation ◽  
Solution Viscosity ◽  
Type I ◽  
Branch Points ◽  
Physical Treatment ◽  
Purification Method ◽  
Long Chain Branching ◽  
Recent Advances

Abstract Structural characterization of rubber from Hevea brasiliensis (NR) has been carried out to elucidate the biosynthesis mechanism of rubber molecule as well as to find the relationship between physical properties characteristic of NR and its structure. Recent advances of structural studies have provided a series of new information on the structure of long-chain branching based on the result of selective decomposition of branch-points by chemical and enzymatic treatments as well as physical treatment such as polar solvent treatments and washing of NR latex by centrifugation in the presence of a surfactant. The measurement of the resulting rubber with NMR, FTIR, SEC and dilute solution viscosity provided confirming evidence that the initiating terminal (ω-terminal) with an unidentified functional group and phosphate terminal (α-terminal) form branch-points by hydrogen bond, ionic bond or micelle formation of phospholipids linked to both terminal groups. Based on these results, the origin of green properties characteristic of NR has been explained and a new mechanism of storage hardening has been proposed. The purification method by saponification of NR latex developed for the structural characterization has been applied to produce purified NR latex free from Type I allergic reaction. Instantaneous coagulation of saponified latex by the use of a flocculant and formic acid has provided solid saponified NR having good green and cured rubber properties.

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

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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