Influence of the Surface Functional Group Density on the Carbon-Nanotube-Induced α-Chymotrypsin Structure and Activity Alterations

2015 ◽  
Vol 7 (33) ◽  
pp. 18880-18890 ◽  
Author(s):  
Xingchen Zhao ◽  
Fang Hao ◽  
Dawei Lu ◽  
Wei Liu ◽  
Qunfang Zhou ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Functional Group ◽  
Surface Functional Group ◽  
Group Density ◽  
Structure And Activity

Periodic surface functional group density on graphene via laser-induced substrate patterning at Si/SiO2 interface

Nano Research ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2332-2339 ◽  
Author(s):  
Karolina A. Drogowska-Horna ◽  
Inam Mirza ◽  
Alvaro Rodriguez ◽  
Petr Kovaříček ◽  
Juraj Sládek ◽  
...  
Keyword(s):  
Functional Group ◽  
Surface Functional Group ◽  
Periodic Surface ◽  
Group Density ◽  
Substrate Patterning

Periodic Surface Functional Group Density on Graphene Induced by Pulsed Laser Patterning of SiO2/Si Substrate

2020 ◽  
Author(s):  
Inam Mirza ◽  
Karolina Anna Drogowska ◽  
Alvaro Rodriguez ◽  
Petr Kovaricek ◽  
Juraj Sladek ◽  
...  
Keyword(s):  
Functional Group ◽  
Pulsed Laser ◽  
Surface Functional Group ◽  
Si Substrate ◽  
Periodic Surface ◽  
Laser Patterning ◽  
Group Density

Facile crosslinking synthesis of hyperbranch-substrate nanonetwork magnetite nanocomposite for the fast and highly efficient removal of lead ions and anionic dyes from aqueous solutions

RSC Advances ◽  
2016 ◽  
Vol 6 (71) ◽  
pp. 67057-67071 ◽  
Author(s):  
Mingqiang Liu ◽  
Baochang Zhang ◽  
Huicai Wang ◽  
Fei Zhao ◽  
Yuan Chen ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Functional Group ◽  
Lead Ions ◽  
Surface Functional Group ◽  
Efficient Removal ◽  
Anionic Dyes ◽  
Highly Efficient ◽  
Adsorption Behaviors ◽  
Group Density ◽  
Effect Of Surface

The aim of the present work was to investigate the effect of surface functional group density on the adsorption behaviors of functionalized mesoporous Fe3O4.

scholarly journals Role of Surface Chemistry in the In Vitro Lung Response to Nanofibrillated Cellulose

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 389
Author(s):  
Kukka Aimonen ◽  
Satu Suhonen ◽  
Mira Hartikainen ◽  
Viviana R. Lopes ◽  
Hannu Norppa ◽  
...  
Keyword(s):  
Micronucleus Assay ◽  
Nanofibrillated Cellulose ◽  
In Vitro Toxicity ◽  
Surface Functional Group ◽  
Fiber Morphology ◽  
Surface Charges ◽  
Cell Viability Assay ◽  
Wide Range ◽  
Group Density

Wood-derived nanofibrillated cellulose (NFC) has emerged as a sustainable material with a wide range of applications and increasing presence in the market. Surface charges are introduced during the preparation of NFC to facilitate the defibrillation process, which may also alter the toxicological properties of NFC. In the present study, we examined the in vitro toxicity of NFCs with five surface chemistries: nonfunctionalized, carboxymethylated, phosphorylated, sulfoethylated, and hydroxypropyltrimethylammonium-substituted. The NFC samples were characterized for surface functional group density, surface charge, and fiber morphology. Fibril aggregates predominated in the nonfunctionalized NFC, while individual nanofibrils were observed in the functionalized NFCs. Differences in surface group density among the functionalized NFCs were reflected in the fiber thickness of these samples. In human bronchial epithelial (BEAS-2B) cells, all NFCs showed low cytotoxicity (CellTiter-GloVR luminescent cell viability assay) which never exceeded 10% at any exposure time. None of the NFCs induced genotoxic effects, as evaluated by the alkaline comet assay and the cytokinesis-block micronucleus assay. The nonfunctionalized and carboxymethylated NFCs were able to increase intracellular reactive oxygen species (ROS) formation (chloromethyl derivative of 2′,7′-dichlorodihydrofluorescein diacetate assay). However, ROS induction did not result in increased DNA or chromosome damage.

scholarly journals Tailoring the mass distribution and functional group density of dimethylsiloxane-based films by thermal evaporation

APL Materials ◽  
2016 ◽  
Vol 4 (5) ◽  
pp. 056101 ◽  
Author(s):  
Tino Töpper ◽  
Samuel Lörcher ◽  
Florian Weiss ◽  
Bert Müller
Keyword(s):  
Mass Distribution ◽  
Functional Group ◽  
Thermal Evaporation ◽  
Group Density

scholarly journals NO gas sensing ability of activated carbon fibers modified by an electron beam for improvement in the surface functional group

2016 ◽  
Vol 20 ◽  
pp. 19-25 ◽  
Author(s):  
Mi-Seon Park ◽  
Sangmin Lee ◽  
Min-Jung Jung ◽  
Hyeong Gi Kim ◽  
Young-Seak Lee
Keyword(s):  
Electron Beam ◽  
Activated Carbon ◽  
Carbon Fibers ◽  
Functional Group ◽  
Gas Sensing ◽  
Surface Functional Group ◽  
Activated Carbon Fibers

The influence of the functional group density on gas flow and selectivity: Nanoscale interactions in alkyl-functionalized mesoporous membranes

2017 ◽  
Vol 237 ◽  
pp. 38-48 ◽  
Author(s):  
Benjamin Besser ◽  
Saad Malik ◽  
Michael Baune ◽  
Stephen Kroll ◽  
Jorg Thöming ◽  
...  
Keyword(s):  
Gas Flow ◽  
Functional Group ◽  
Nanoscale Interactions ◽  
Group Density ◽  
Mesoporous Membranes

scholarly journals Variation in Feedstock Wood Chemistry Strongly Influences Biochar Liming Potential

Soil Systems ◽  
2019 ◽  
Vol 3 (2) ◽  
pp. 26 ◽  
Author(s):  
Sossina Gezahegn ◽  
Mohini Sain ◽  
Sean Thomas
Keyword(s):  
Functional Group ◽  
Pyrolysis Temperature ◽  
Chemical Properties ◽  
Base Cation ◽  
Surface Functional Group ◽  
Wood Chemistry ◽  
Incubation Experiments ◽  
Phenolic Group ◽  
Capacity Data ◽  
Group Concentration

Chars intended for use as soil amendment (“biochars”) vary greatly in their chemical and physical properties. In the present study, 19 Canadian temperate wood feedstocks were charred across a range of pyrolysis temperatures from 300–700 °C. The resulting 95 biochars were tested for their physio-chemical properties and liming capacity. Data indicated increasing base cation concentrations including Ca, Mg, and K (elements that characteristically form liming compounds, i.e., carbonates) as pyrolysis temperature increased. Acidic surface functional groups were analyzed with modified Boehm titration: Carboxylic and lactonic functional group concentrations decreased and phenolic group concentration increased with pyrolysis temperature. Functional group composition also varied greatly with feedstock: In particular, conifer-derived biochars produced at pyrolysis temperatures <500 °C showed much higher carboxylic and lactonic functional group concentrations than did angiosperm-derived biochars. Liming capacity was assessed using soil incubation experiments and was positively related to biochar pH. Both acidic surface functional group concentration and nutrient element concentration influenced biochar pH: we developed a non-linear functional relationship that predicts biochar pH from the ratio of carboxylic to phenolic moieties, and concentrations of Ca and K. Biochar’s liming components that are inherited from feedstock and predictably modified by pyrolysis temperature provide a basis for optimizing the production of biochar with desired pH and liming characteristics.

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