Surface modification with highly-homogeneous porous silica layer for enzyme immobilization in capillary enzyme microreactors

Talanta ◽  
2019 ◽  
Vol 197 ◽  
pp. 539-547 ◽  
Author(s):  
Xin Liu ◽  
Xudong Zhu ◽  
Mohamed Amara Camara ◽  
Qishu Qu ◽  
Yichu Shan ◽  
...  
Keyword(s):  
Surface Modification ◽  
Enzyme Immobilization ◽  
Porous Silica ◽  
Silica Layer

scholarly journals Biogenic porous silica and silicon sourced from Mexican Giant Horsetail (Equisetum myriochaetum) and their application as supports for enzyme immobilization

2018 ◽  
Vol 166 ◽  
pp. 195-202 ◽  
Author(s):  
Anna Sola-Rabada ◽  
Padma Sahare ◽  
Graham J. Hickman ◽  
Marco Vasquez ◽  
Leigh T. Canham ◽  
...  
Keyword(s):  
Enzyme Immobilization ◽  
Porous Silica

scholarly journals The Effect of SBA-15 Surface Modification on the Process of 18β-Glycyrrhetinic Acid Adsorption: Modeling of Experimental Adsorption Isotherm Data

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3671 ◽  
Author(s):  
Michał Moritz ◽  
Małgorzata Geszke-Moritz
Keyword(s):  
Surface Modification ◽  
Adsorption Capacity ◽  
Raw Materials ◽  
Porous Silica ◽  
Bioactive Compound ◽  
Glycyrrhetinic Acid ◽  
Plant Materials ◽  
Nonlinear Fitting ◽  
Pentacyclic Triterpenoid ◽  
Vegetable Raw Materials

This study aimed at the adsorption of 18β-glycyrrhetinic acid (18β-GA), a pentacyclic triterpenoid derivative of oleanane type, onto functionalized mesoporous SBA-15 silica and non-porous silica (Aerosil®) as the reference adsorbent. Although 18β-GA possesses various beneficial pharmacological properties including antitumor, anti-inflammatory, and antioxidant activity, it occurs is small amounts in plant materials. Thus, the efficient methods of this bioactive compound enrichment from vegetable raw materials are currently studied. Siliceous adsorbents were functionalized while using various alkoxysilane derivatives, such as (3-aminopropyl)trimethoxysilane (APTMS), [3-(methylamino)propyl]trimethoxysilane (MAPTMS), (N,N-dimethylaminopropyl)trimethoxysilane (DMAPTMS), and [3-(2-aminothylamino)propyl] trimethoxysilane (AEAPTMS). The effect of silica surface modification with agents differing in the structure and the order of amine groups on the adsorption capacity of the adsorbent and adsorption efficiency were thoroughly examined. The equilibrium adsorption data were analyzed while using the Langmuir, Freundlich, Redlich-Peterson, Temkin, Dubinin-Radushkevich, and Dubinin-Astakhov isotherms. Both linear regression and nonlinear fitting analysis were employed in order to find the best-fitted model. The adsorption isotherms of 18β-GA onto silicas functionalized with APTMS, MAPTMS, and AEAPTMS indicate the Langmuir-type adsorption, whereas sorbents modified with DMAPTMS show the constant distribution of the adsorbate between the adsorbent and the solution regardless of silica type. The Dubinin-Astakhov, Dubinin-Radushkevich, and Redlich-Peterson equations described the best the process of 18β-GA adsorption onto SBA-15 and Aerosil® silicas that were functionalized with APTMS, MAPTMS, and AEAPTMS, regardless of the method that was used for the estimation of isotherm parameters. Based on nonlinear fitting analysis (Dubinin-Astakhov model), it can be concluded that SBA-15 sorbent that was modified with APTMS, MAPTMS, and AEAPTMS is characterized by twice the adsorption capacity (202.8–237.3 mg/g) as compared to functionalized non-porous silica (118.2–144.2 mg/g).

Surface Modification of Porous Silica Using Supercritical Carbon Dioxide

2012 ◽  
Vol 38 (6) ◽  
pp. 391-396 ◽  
Author(s):  
Ikuo Ushiki ◽  
Masaki Ota ◽  
Yoshiyuki Sato ◽  
Hiroshi Inomata
Keyword(s):  
Carbon Dioxide ◽  
Surface Modification ◽  
Supercritical Carbon Dioxide ◽  
Porous Silica ◽  
Supercritical Carbon

Surface Modification of Halloysite Nanotubes with Dopamine for Enzyme Immobilization

2013 ◽  
Vol 5 (21) ◽  
pp. 10559-10564 ◽  
Author(s):  
Cong Chao ◽  
Jindun Liu ◽  
Jingtao Wang ◽  
Yanwu Zhang ◽  
Bing Zhang ◽  
...  
Keyword(s):  
Surface Modification ◽  
Enzyme Immobilization ◽  
Halloysite Nanotubes

Review on surface modification of nanocarriers to overcome diffusion limitations: An enzyme immobilization aspect

2020 ◽  
Vol 158 ◽  
pp. 107574 ◽  
Author(s):  
Carlin geor malar ◽  
Muthulingam Seenuvasan ◽  
Kannaiyan Sathish Kumar ◽  
Anil Kumar ◽  
R Parthiban
Keyword(s):  
Surface Modification ◽  
Enzyme Immobilization ◽  
Diffusion Limitations

Doping of optical fiber preforms via porous silica layer infiltration with salt solutions

2005 ◽  
Vol 41 (3) ◽  
pp. 303-307 ◽  
Author(s):  
V. F. Khopin ◽  
A. A. Umnikov ◽  
A. N. Gur’yanov ◽  
M. M. Bubnov ◽  
A. K. Senatorov ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Porous Silica ◽  
Silica Layer ◽  
Salt Solutions ◽  
Fiber Preforms

scholarly journals Surface modification of carbon felt by cold remote plasma for glucose oxidase enzyme immobilization

2019 ◽  
Vol 476 ◽  
pp. 1016-1024 ◽  
Author(s):  
May Kahoush ◽  
Nemeshwaree Behary ◽  
Aurélie Cayla ◽  
Brigitte Mutel ◽  
Jinping Guan ◽  
...  
Keyword(s):  
Surface Modification ◽  
Glucose Oxidase ◽  
Enzyme Immobilization ◽  
Carbon Felt ◽  
Remote Plasma ◽  
Oxidase Enzyme
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