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Artykuły w czasopismach na temat „Silica immobilisation”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 18 lutego 2022

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1

Coradin, Thibaud, i Jacques Livage. "Mesoporous alginate/silica biocomposites for enzyme immobilisation". Comptes Rendus Chimie 6, nr 1 (styczeń 2003): 147–52. http://dx.doi.org/10.1016/s1631-0748(03)00006-7.

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Koopal, L. K., Y. Yang, A. J. Minnaard, P. L. M. Theunissen i W. H. Van Riemsdijk. "Chemical immobilisation of humic acid on silica". Colloids and Surfaces A: Physicochemical and Engineering Aspects 141, nr 3 (listopad 1998): 385–95. http://dx.doi.org/10.1016/s0927-7757(97)00170-2.

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3

Cesarino, Ivana, Éder T. G. Cavalheiro, Glimaldo Marino i Jivaldo R. Matos. "Functionalisation and Characterization of SBA-15 Nanostructured Silica Modified with 2-Benzothiazolethiol". Materials Science Forum 587-588 (czerwiec 2008): 458–62. http://dx.doi.org/10.4028/www.scientific.net/msf.587-588.458.

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Mesoporous silica can be modified and functionalised by immobilisation of organic substances covalently bonded to the silanol groups on the silica surface. This paper describes the modification of a SBA-15 nanostructured silica with 2-benzothiazolethiol. After derivatization the modified silica was chacacterized by elemental analysis, IR spectroscopy, thermal analysis (TG and DSC), NMR in solid phase and scanning electron microscopy.

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4

Moelans, Dieder, Pegie Cool, Jan Baeyens i Etienne F. Vansant. "Immobilisation behaviour of biomolecules in mesoporous silica materials". Catalysis Communications 6, nr 9 (wrzesień 2005): 591–95. http://dx.doi.org/10.1016/j.catcom.2005.05.007.

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5

Danil de Namor, Angela F., Jorge A. Zvietcovich-Guerra, Jose A. Villanueva Salas, Oscar E. Piro, Oliver A. Webb, Abdelaziz El Gamouz, Weam Abou Hamdan i Eduardo E. Castellano. "Calix[4]arene amine modified silica: from fundamentals to new recyclable materials for the removal of chlorophenoxy acids from water". RSC Advances 5, nr 42 (2015): 33524–35. http://dx.doi.org/10.1039/c5ra02551f.

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6

Hu, Jianpeng, Bingnan Yuan, Yongming Zhang i Minghui Guo. "Immobilization of laccase on magnetic silica nanoparticles and its application in the oxidation of guaiacol, a phenolic lignin model compound". RSC Advances 5, nr 120 (2015): 99439–47. http://dx.doi.org/10.1039/c5ra14982g.

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Immobilisation of Aspergillus laccase on magnetic silica nanoparticles via a facile and efficient process and its high catalytic efficiency for guaiacol as phenolic lignin model compound was investigated.

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7

Matsuura, Shun-ichi, Tomoya Baba, Manami Chiba i Tatsuo Tsunoda. "Nanoporous scaffold for DNA polymerase: pore-size optimisation of mesoporous silica for DNA amplification". RSC Adv. 4, nr 49 (2014): 25920–23. http://dx.doi.org/10.1039/c4ra02725f.

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The simple and selective immobilisation of a thermostable DNA polymerase on mesoporous silicas was achieved, and DNA amplification activity was retained under the pore-size regulation of the mesoporous silicas.

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8

Rózga-Wijas, K., J. Chojnowski, W. Fortuniak, M. Ścibiorek, Z. Michalska i Ł. Rogalski. "Branched functionalised polysiloxane–silica hybrids for immobilisation of catalysts". J. Mater. Chem. 13, nr 9 (2003): 2301–10. http://dx.doi.org/10.1039/b304134d.

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9

Willemin, Stephanie, Guillem Arrachart, Lollita Lecren, Joulia Larionova, Thibaud Coradin, Rodolphe Clérac, Talal Mallah, Christian Guérin i Clément Sanchez. "Immobilisation of single molecule magnets in mesoporous silica hosts". New J. Chem. 27, nr 10 (2003): 1533–39. http://dx.doi.org/10.1039/b305124b.

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10

Pillinger, Martyn, Carla D. Nunes, Pedro D. Vaz, Anabela A. Valente, Isabel S. Gonçalves, Paulo J. A. Ribeiro-Claro, João Rocha, Luís D. Carlos i Fritz E. Kühn. "Immobilisation of rhodium acetonitrile complexes in ordered mesoporous silica". Physical Chemistry Chemical Physics 4, nr 13 (22.05.2002): 3098–105. http://dx.doi.org/10.1039/b202537j.

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11

Hemming, Ellen B., Anthony F. Masters i Thomas Maschmeyer. "Immobilisation of Homogeneous Pd Catalysts within a Type I Porous Liquid". Australian Journal of Chemistry 73, nr 12 (2020): 1296. http://dx.doi.org/10.1071/ch20256.

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An N-heterocyclic carbene-based palladium complex was successfully immobilised on the inner surfaces of hollow silica nanospheres. The external surfaces of these spheres were functionalised with a corona-canopy to produce a Type I porous liquid. To confirm the successful immobilisation of the catalytic precursor, the porous liquid system was explored using the Heck reaction as a model reaction. This work demonstrated that homogeneous catalysts can be successfully immobilised within porous liquids in principle and that the approach used could be readily adapted for the immobilisation of other systems.

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12

Rahimizadeh, Mohammad, Esmaeel Rezaei Seresht, Mehdi Bakavoli i Neda Golari. "The First Immobilisation of Glycoluril-Based Molecular Clips on Silica Gel and Alumina". Journal of Chemical Research 2007, nr 9 (wrzesień 2007): 525–27. http://dx.doi.org/10.3184/030823407x245606.

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The first example of immobilisation of some glycoluril-based molecular clips, which are good receptors for dihydroxybenzenes, on silica gel and alumina is described. 4,4′-Bis(methoxyphenyl)glycoluril was used as the base scaffold for the synthesis of molecular clips. After demethylation of the methoxy groups, the clip compounds were attached to silica gel and alumina using the linker (3-chloropropyl)trimethoxysilane. The resulting clip-functionalised silica gel and alumina could be applied as a stationary phase in an affinity chromatography technique for the separation and purification of dihydroxybenzenes and the more important biologically active catecholamines.

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13

Králík, A., M. Hansen i B. König. "Immobilisation of water-oxidising amphiphilic ruthenium complexes on unmodified silica gel". RSC Advances 6, nr 7 (2016): 5739–44. http://dx.doi.org/10.1039/c5ra24088c.

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14

Popat, Amirali, Sandy Budi Hartono, Frances Stahr, Jian Liu, Shi Zhang Qiao i Gao Qing (Max) Lu. "Mesoporous silica nanoparticles for bioadsorption, enzyme immobilisation, and delivery carriers". Nanoscale 3, nr 7 (2011): 2801. http://dx.doi.org/10.1039/c1nr10224a.

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15

Masuda, Yuichi, Shin-ichi Kugimiya, Yuki Kawachi i Katsuya Kato. "Interparticle mesoporous silica as an effective support for enzyme immobilisation". RSC Adv. 4, nr 7 (2014): 3573–80. http://dx.doi.org/10.1039/c3ra46122j.

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16

Agustian, Joni, i Lilis Hermida. "The Optimised Statistical Model for Enzymatic Hydrolysis of Tapioca by Glucoamylase Immobilised on Mesostructured Cellular Foam Silica". Bulletin of Chemical Reaction Engineering & Catalysis 14, nr 2 (1.08.2019): 380. http://dx.doi.org/10.9767/bcrec.14.2.3078.380-390.

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Enzymatic hydrolysis of starches using free glucoamylase to reducing sugars have difficulties in recovering and recycling of the enzyme, hence immobilisation on inert supports were widely studied. However, effectiveness of the immobilised glucoamylase were merely observed only on soluble starches. It was considered a valuable thing to know performance of glucoamylase on Mesostructured Cellular Foam (MCF) silica in hydrolysing of tapioca. An optimised study on enzymatic hydrolysis of tapioca using glucoamylase on MCF silica (9.2T-3D) and its kinetics were described including justification of the predicted model as it was required to develop in large scale operations. Central Composite Design was used to model the process by studying effects of three factors on DE values after enzyme immobilisation. Immobilisation of glucoamylase on this support gave up to 82% efficiency with the specific activity of 1,856.78 U.g-1. Its used to hydrolysis of tapioca resulted DE values of 1.740-76.303% (w/w) where the highest DE was obtained at pH of 4.1, temperature of 70 ℃ and agitation speed of 140 rpm. The optimisation produced a polynomial quadratic model having insignificant lack-of-fit and low standard deviation, so that it was applicable and reliable in simulating the DE with only 0.80% of data were not described. Temperature affected the process highly, but the buffer pH, agitation speed and factorial interactions were considered not important. KM value for immobilised enzyme was better than the free glucoamylase, however, its reaction rate was slower than the free glucoamylase catalysis. Copyright © 2019 BCREC Group. All rights reserved

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17

Collins, Gillian, Kamil Rahme, John O'Connell i Justin D. Holmes. "Embedding colloidal nanoparticles inside mesoporous silica using gas expanded liquids for high loading recyclable catalysts". Catalysis Science & Technology 6, nr 19 (2016): 7212–19. http://dx.doi.org/10.1039/c6cy00584e.

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Size and composition controlled alloy nanoparticles can be easily incorporated into porous SiO₂ supports using carbon dioxide expanded hexane. Embedding NPs into porous networks increase catalyst stability and recyclability compared to immobilisation on non-porous SiO₂ supports.

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18

Sankarshana, T., J. Soujanya i A. Anil Kumar. "Triphase Catalysis Using Silica Gel as Support". International Journal of Chemical Reactor Engineering 11, nr 1 (4.07.2013): 347–52. http://dx.doi.org/10.1515/ijcre-2013-0007.

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Abstract The oxidation reaction of 2-ethyl-1-hexanol with potassium permanganate in the presence and absence of silica-gel-supported phase-transfer catalyst (PTC) in triphasic conditions was studied. In a batch reactor, the performance of the solid-supported catalysts was compared with unsupported catalyst and without the catalyst. The effect of speed of agitation, catalyst concentration, potassium permanganate concentration and temperature on reaction rate was studied. The reaction is found to be in the kinetic regime. The rate of reaction with the catalyst immobilised on the silica gel was less compared to the catalyst without immobilisation. Triphase catalysis with supported PTCs has potential applications in the continuous quest for greener industrial practices.

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19

Trivedi, Vivek, Ruchir Bhomia i John C. Mitchell. "Myristic Acid Coated Protein Immobilised Mesoporous Silica Particles as pH Induced Oral Delivery System for the Delivery of Biomolecules". Pharmaceuticals 12, nr 4 (12.10.2019): 153. http://dx.doi.org/10.3390/ph12040153.

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Solid core drug delivery systems (SCDDS) were prepared for the oral delivery of biomolecules using mesoporous silica as core, bovine haemoglobin (bHb) as model drug and supercritical fluid (SCF) processing as encapsulation technique. The use of organic solvents or harsh processing conditions in the development of drug delivery systems for biomolecules can be detrimental for the structural integrity of the molecule. Hence, the coating on protein-immobilised particles was performed via supercritical carbon dioxide (scCO2) processing at a temperature lower than the melting point of myristic acid (MA) to avoid any thermal degradation of bHb. The SCDDS were prepared by bHb immobilisation on mesoporous silica followed by myristic acid (MA) coating at 43 °C and 100 bar in scCO2. bHb-immobilised silica particles were also coated via solvent evaporation (SE) to compare the protein release with scCO2 processed formulations. In both cases, MA coating provided required enteric protection and restricted the bHb release for the first two hours in simulated gastric fluid (SGF). The protein release was immediate upon the change of media to simulated intestinal fluid (SIF), reaching 70% within three hours. The release from SCF processed samples was slower than SE formulations, indicating superior surface coverage of MA on particles in comparison to the SE method. Most importantly, the protein conformation remained unchanged after the release from SCDDS as confirmed by circular dichroism. This study clearly demonstrates that the approach involving protein immobilisation on silica and scCO2 assisted melt-coating method can protect biomolecules from gastric environment and provide the required release of a biologic in intestine without any untoward effects on protein conformation during processing or after release.

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20

Wilson, Natalie G., Tom McCreedy i Gillian M. Greenway. "In-situ immobilisation of glucose oxidase on a novel microporous silica support". Analyst 125, nr 2 (2000): 237–39. http://dx.doi.org/10.1039/a908691i.

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Rooke, Joanna Claire, Alexandre Léonard i Bao-Lian Su. "Targeting photobioreactors: Immobilisation of cyanobacteria within porous silica gel using biocompatible methods". Journal of Materials Chemistry 18, nr 12 (2008): 1333. http://dx.doi.org/10.1039/b717990a.

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22

Cao, Xiaodong, Yuxue Sun, Yongkang Ye, Ying Li i Xiaoguang Ge. "Macroporous ordered silica foam for glucose oxidase immobilisation and direct electrochemical biosensing". Analytical Methods 6, nr 5 (2014): 1448. http://dx.doi.org/10.1039/c3ay41755g.

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23

Kalantari, Mohammad, Mohammad Kazemeini, Fatemeh Tabandeh i Ayyoob Arpanaei. "Lipase immobilisation on magnetic silica nanocomposite particles: effects of the silica structure on properties of the immobilised enzyme". Journal of Materials Chemistry 22, nr 17 (2012): 8385. http://dx.doi.org/10.1039/c2jm30513e.

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24

McDonald, Aidan R., Nicole Franssen, Gerard P. M. van Klink i Gerard van Koten. "‘Click’ silica immobilisation of metallo-porphyrin complexes and their application in epoxidation catalysis". Journal of Organometallic Chemistry 694, nr 14 (czerwiec 2009): 2153–62. http://dx.doi.org/10.1016/j.jorganchem.2009.02.020.

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25

Nagel, Jürgen, Felix Kroschwald, Cornelia Bellmann, Simona Schwarz, Andreas Janke i Gert Heinrich. "Immobilisation of different surface-modified silica nanoparticles on polymer surfaces via melt processing". Colloids and Surfaces A: Physicochemical and Engineering Aspects 532 (listopad 2017): 208–12. http://dx.doi.org/10.1016/j.colsurfa.2017.05.016.

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26

Niedziolka, Joanna, Maria A. Murphy, Frank Marken i Marcin Opallo. "Characterisation of hydrophobic carbon nanofiber–silica composite film electrodes for redox liquid immobilisation". Electrochimica Acta 51, nr 26 (sierpień 2006): 5897–903. http://dx.doi.org/10.1016/j.electacta.2006.03.028.

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Xiao, Xinxin, Till Siepenkoetter, Robert Whelan, Urszula Salaj-Kosla i Edmond Magner. "A continuous fluidic bioreactor utilising electrodeposited silica for lipase immobilisation onto nanoporous gold". Journal of Electroanalytical Chemistry 812 (marzec 2018): 180–85. http://dx.doi.org/10.1016/j.jelechem.2017.11.059.

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Geysen, D., C. Vandecasteele, M. Jaspers i G. Wauters. "Comparison of immobilisation of air pollution control residues with cement and with silica". Journal of Hazardous Materials 107, nr 3 (marzec 2004): 131–43. http://dx.doi.org/10.1016/j.jhazmat.2003.12.001.

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Sim, Yong-Kyun, Jung-Woo Park, Bo-Hyeong Kim i Chul-Ho Jun. "A method for highly efficient catalytic immobilisation of glucose oxidase on the surface of silica". Chemical Communications 49, nr 95 (2013): 11170. http://dx.doi.org/10.1039/c3cc47011c.

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Skowerski, Krzysztof, Jacek Białecki, Stefan J. Czarnocki, Karolina Żukowska i Karol Grela. "Effective immobilisation of a metathesis catalyst bearing an ammonium-tagged NHC ligand on various solid supports". Beilstein Journal of Organic Chemistry 12 (5.01.2016): 5–15. http://dx.doi.org/10.3762/bjoc.12.2.

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An ammonium-tagged ruthenium complex, 8, was deposited on several widely available commercial solid materials such as silica gel, alumina, cotton, filter paper, iron powder or palladium on carbon. The resulting catalysts were tested in toluene or ethyl acetate, and found to afford metathesis products in high yield and with extremely low ruthenium contamination. Depending on the support used, immobilised catalyst 8 shows also additional traits, such as the possibility of being magnetically separated or the use for metathesis and subsequent reduction of the obtained double bond in one pot.

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31

Pruß, T. "Cobalt–acetato complexes immobilised on PYPA-organomodified silica: a case study of different ways of immobilisation". Journal of Molecular Catalysis A: Chemical 211, nr 1-2 (15.03.2004): 209–17. http://dx.doi.org/10.1016/j.molcata.2003.10.014.

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32

Nakanishi, Kazuma, Masahiro Tomita i Katsuya Kato. "Improvement in the catalytic activity of cytochrome c by immobilisation on a novel mesoporous silica sheet". RSC Adv. 4, nr 9 (2014): 4732–35. http://dx.doi.org/10.1039/c3ra45861j.

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Szilágyi, István, László Horváth, Imre Labádi, Klara Hernadi, István Pálinkó i Tamás Kiss. "Mimicking catalase and catecholase enzymes by copper(II)-containing complexes". Open Chemistry 4, nr 1 (1.03.2006): 118–34. http://dx.doi.org/10.1007/s11532-005-0009-6.

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AbstractAn imidazolate-bridged copper(II)-zinc(II) complex (Cu(II)-diethylenetriamino-μ-imidazolato-Zn(II)-tris(2-aminoethyl)amine perchlorate (denoted as “Cu,Zn complex”) and a simple copper(II) complex (Cu(II)-tris(2-aminoethyl) amine chloride (“Cu-tren”) were prepared and immobilised on silica gel (by hydrogen or covalent bonds) and montmorillonite (by ion exchange). The immobilised substances were characterised by FT-IR spectroscopy and their thermal characteristics were also studied. The obtained materials were tested in two probe reactions: catalytic oxidation of 3,5-di-tert-butyl catechol (DTBC) (catecholase activity) and the decomposition of hydrogen peroxide (catalase activity). It was found that the catecholase activity of the Cu,Zn complex increased considerably upon immobilization on silica gel via hydrogen bonds and intercalation by ion exchange among the layers of montmorillonite. The imidazolate-bridged copper(II)-zinc(II) complex and its immobilised versions were inactive in hydrogen peroxide decomposition. The Cu(II)-tris(2-aminoethyl)amine chloride complex displayed good catalase activity; however, immobilisation could not improve it.

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Hüttner, Silvia, Milene Zezzi Do Valle Gomes, Laura Iancu, Anders Palmqvist i Lisbeth Olsson. "Immobilisation on mesoporous silica and solvent rinsing improve the transesterification abilities of feruloyl esterases from Myceliophthora thermophila". Bioresource Technology 239 (wrzesień 2017): 57–65. http://dx.doi.org/10.1016/j.biortech.2017.04.106.

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Didukh-Shadrina, Svetlana L., Vladimir N. Losev, Alexandr Samoilo, Anatoliy К. Trofimchuk i Pavel N. Nesterenko. "Determination of Metals in Natural Waters by Inductively Coupled Plasma Optical Emission Spectroscopy after Preconcentration on Silica Sequentially Coated with Layers of Polyhexamethylene Guanidinium and Sulphonated Nitrosonaphthols". International Journal of Analytical Chemistry 2019 (1.07.2019): 1–13. http://dx.doi.org/10.1155/2019/1467631.

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A series of complexing adsorbents is prepared by coating silica particles with linear polyhexamethylene guanidinium (PHMG) chloride followed by saturation with a number of sulphonated nitrosonaphthols reagents electrostatically retained by positively charged polymer layer. PHMG coated silica is hydrolytically stable even during treatment with 6 M HCl heated up to 50 °C. The adsorption of 1-nitroso-2-naphthol-3,6-disulfonic acid (nitroso-R-salt), 2-nitroso-1-naphthol-4-sulfonic acid (nitroso-N-salt), and 2-nitroso-1-naphthol-3,6-disulfonic acid (nitroso-K-salt) on PHMG modified silica was studied. The effective immobilisation of sulphonated nitrosonaphthols was achieved in the range of pH of 3 - 8, while the adsorption of the monosulphonated reagent (nitroso-N-salt) is twice as high as the disulphonated analogues (nitroso-R-salt and nitroso-K-salt). The adsorption of Cu(II), Fe(III), Co(II), Ni(II), Al(III), Zn(II), Pb(II), Mn(II), and Cr(III) on prepared complexing adsorbents under static and dynamic conditions was studied as a function of time, pH, sample volume, and presence of interfering ions. Metal ions can be desorbed by using 1 M HCl or 1 M HNO3. The preconcentration factors of metals under optimized conditions are varied from 20 to 80. The developed method was used for the preconcentration of trace metals from natural waters followed by ICP-OES determination. The sub-ppb limits of detection of metals are achieved.

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Renard, Gilbert, Mihaela MureseanuOn leave from the Faculty, Anne Galarneau, Dan A. Lerner i Daniel Brunel. "Immobilisation of a biological chelate in porous mesostructured silica for selective metal removal from wastewater and its recovery". New Journal of Chemistry 29, nr 7 (2005): 912. http://dx.doi.org/10.1039/b500302b.

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Park, Jeong Su, Yeonweon Choi, Junho Ahn, Moo Lyong Seo i Jong Hwa Jung. "Bis(naphthol)-based fluorescent chemoprobe for cesium cation and its immobilisation on silica nanoparticle as a high selective adsorbent". Supramolecular Chemistry 29, nr 10 (11.01.2017): 707–13. http://dx.doi.org/10.1080/10610278.2016.1269904.

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38

Phan, Nam T. S., David H. Brown i Peter Styring. "A facile method for catalyst immobilisation on silica: nickel-catalysed Kumada reactions in mini-continuous flow and batch reactors". Green Chemistry 6, nr 10 (2004): 526. http://dx.doi.org/10.1039/b405203j.

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Meunier, Christophe F., Joanna C. Rooke, Alexandre Léonard, Pierre Van Cutsem i Bao-Lian Su. "Design of photochemical materials for carbohydrate production via the immobilisation of whole plant cells into a porous silica matrix". J. Mater. Chem. 20, nr 5 (2010): 929–36. http://dx.doi.org/10.1039/b919763j.

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40

Sibeko, M. A., M. L. Saladino, F. Armetta, A. Spinella i A. S. Luyt. "Effect of preparation method on the properties of poly(methyl methacrylate)/mesoporous silica composites". Emergent Materials 2, nr 3 (wrzesień 2019): 363–70. http://dx.doi.org/10.1007/s42247-019-00057-1.

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Abstract The preparation method of a polymer composite and the filler loading are amongst the factors that influence the properties of the final composites. This article studies the effect of these factors on the thermal stability and thermal degradation kinetics of poly(methyl methacrylate) (PMMA)/mesoporous silica (MCM-41) composites filled with small amounts of MCM-41. The PMMA/MCM-41 composites were prepared through in situ polymerisation and melt mixing methods, with MCM-41 loadings of 0.1, 0.3, and 0.5 wt.%. The presence of MCM-41 increased the thermal stability of PMMA/MCM-41 composites prepared by melt mixing, but in the case of the in situ polymerised samples, the MCM-41 accelerated the degradation of the polymer. As a result, the activation energy was low and less energy was required to initiate and propagate the degradation process of these composites. The small-angle X-ray scattering (SAXS) measurements showed that the preparation method of the composites had no influence on the pore size of MCM-41, but the PMMAs used in the two methods both had shorter chains than the MCM-41 pore size. This allowed the polymer chains to be trapped inside the pores of the filler and be immobilised, as was observed from nuclear magnetic resonance (NMR) spectroscopy. The immobilisation of the polymer chains was more significant in the in situ polymerised samples.

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Salis, Andrea, Marco Pisano, Maura Monduzzi, Vincenzo Solinas i Enrico Sanjust. "Laccase from Pleurotus sajor-caju on functionalised SBA-15 mesoporous silica: Immobilisation and use for the oxidation of phenolic compounds". Journal of Molecular Catalysis B: Enzymatic 58, nr 1-4 (czerwiec 2009): 175–80. http://dx.doi.org/10.1016/j.molcatb.2008.12.008.

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Saikia, Kongkona, Ponnusamy Senthil Kumar, Abiram Karanam Rathankumar, Sundar SaiLavanyaa, Lakshmi Srinivasan, Sivanesan Subramanian, Hubert Cabana, Mathilde Gosselin i Vaidyanathan Vinoth Kumar. "Amino-functionalised mesoporous silica microspheres for immobilisation of Candida antarctica lipase B – application towards greener production of 2,5-furandicarboxylic acid". IET Nanobiotechnology 14, nr 8 (1.10.2020): 732–38. http://dx.doi.org/10.1049/iet-nbt.2020.0021.

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Verdú, Samuel, María Ruiz-Rico, Alberto J. Perez, José M. Barat, Pau Talens i Raúl Grau. "Toxicological implications of amplifying the antibacterial activity of gallic acid by immobilisation on silica particles: A study on C. elegans". Environmental Toxicology and Pharmacology 80 (listopad 2020): 103492. http://dx.doi.org/10.1016/j.etap.2020.103492.

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McDonagh, Chiara, Peter O’Conghaile, Robertus J. M. Klein Gebbink i Patrick O’Leary. "Electrostatic immobilisation of copper(I) and copper(II) bis(oxazolinyl)pyridine catalysts on silica: application to the synthesis of propargylamines via direct addition of terminal alkynes to imines". Tetrahedron Letters 48, nr 25 (czerwiec 2007): 4387–90. http://dx.doi.org/10.1016/j.tetlet.2007.04.095.

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Bryjak, Jolanta, Katarzyna Szymańska i Andrzej B. Jarzębski. "Laccase Immobilisation on Mesostructured Silicas". Chemical and Process Engineering 33, nr 4 (1.12.2012): 611–20. http://dx.doi.org/10.2478/v10176-012-0051-9.

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Extracellular laccase produced by the wood-rotting fungus Cerrena unicolor was immobilised covalently on the mesostructured siliceous foam (MCF) and three hexagonally ordered mesoporous silicas (SBA-15) with different pore sizes. The enzyme was attached covalently via glutaraldehyde (GLA) or by simple adsorption and additionally crosslinked with GLA. The experiments indicated that laccase bound by covalent attachment remains very active and stable. The best biocatalysts were MCF and SBA-15 with Si-F moieties on their surface. Thermal inactivation of immobilised and native laccase at 80°C showed a biphasic-type activity decay, that could be modelled with 3- parameter isoenzyme model. It appeared that immobilisation did not significantly change the mechanism of activity loss but stabilised a fraction of a stable isoform. Examination of time needed for 90% initial activity loss revealed that immobilisation prolonged that time from 8 min (native enzyme) up to 155 min (SBA-15SF).

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Besnard, R., R. Winkler, G. Arrachart, J. Cambedouzou i S. Pellet-Rostaing. "Ion extraction applications of bilayer-structured hybrid silicas". Materials Chemistry Frontiers 2, nr 5 (2018): 1031–39. http://dx.doi.org/10.1039/c8qm00022k.

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Chaignon, Jérémy, Salah-Eddine Stiriba, Francisco Lloret, Consuelo Yuste, Guillaume Pilet, Laurent Bonneviot, Belén Albela i Isabel Castro. "Bioinspired manganese(ii) complexes with a clickable ligand for immobilisation on a solid support". Dalton Trans. 43, nr 25 (2014): 9704–13. http://dx.doi.org/10.1039/c3dt53636j.

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Structural and magnetic characterization of dinuclear manganese(ii) complexes mimicking the active sites of MnD were prepared with an alkyne side function for click chemistry grafting that was tested on MCM-41 silicas.

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Basso, Alessandra, Paolo Braiuca, Sara Cantone, Cynthia Ebert, Paolo Linda, Patrizia Spizzo, Paolo Caimi, Ulf Hanefeld, Giuliano Degrassi i Lucia Gardossi. "In Silico Analysis of Enzyme Surface and Glycosylation Effect as a Tool for Efficient Covalent Immobilisation of CalB and PGA on Sepabeads®". Advanced Synthesis & Catalysis 349, nr 6 (2.04.2007): 877–86. http://dx.doi.org/10.1002/adsc.200600337.

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Kumar, Ashok, Vikrant Sharma, Prachi Sharma i Shamsher Kanwar. "Effective immobilisation of lipase to enhance esterification potential and reusability". Chemical Papers 67, nr 7 (1.01.2013). http://dx.doi.org/10.2478/s11696-013-0377-x.

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AbstractA commercial lipase, “Lipolase T100”, was immobilised onto silica by means of physical adsorption. The silica-bound lipase was subsequently exposed to 1 vol. % glutaraldehyde (pentane-1,5-dial). The silica was loaded repeatedly with the Lipolase T100 in 0.05 M Tris buffer (pH 8.5) until saturation was achieved. During the 1st, 2nd, 3rd, 4th, and 5th cycles of loading of silica with the enzyme, the protein-binding on the silica achieved 51.73 %, 48.27 %, 26.92 %, 10.73 %, and 4.29 %, respectively. The synthesis of methyl salicylate (methyl 2-hydroxybenzoate) and linalyl ferulate (3,7-dimethylocta-1,6-dien-3-yl 4-hydroxy-3-methoxycinnamate) carried out at 45°C under shaking with mole ratios of 200 mM of acid and 500 mM alcohol in DMSO using 15 mg mL−1 of hyper-activated biocatalyst resulted in yield(s) of 77.2 % of methyl salicylate and 65.3 % of linalyl ferulate in the presence of molecular sieves. The hyper-activated biocatalyst was more efficient than the previously reported silica-bound lipase with minimum leaching of the enzyme from the reaction mixture. The K m and V max of the free (0.142 mM and 38.31 μmol min−1 mL−1, respectively) and silica-bound lipase (0.043 mM and 26.32 μmol min−1 mg−1, respectively) were determined for the hydrolysis of p-NPP. During repeated esterification studies using silica-bound lipase, yields of 50.1 % of methyl salicylate after the 5th cycle, and 53.9 % of linalyl ferulate after the 7th cycle of esterification were recorded. In the presence of molecular sieves (30 mg mL−1) in the reaction mixture, the maximum syntheses of methyl salicylate (77.2 %) and linalyl ferulate (65.3 %) were also observed. In a volumetric batch scale-up, when the reaction volume was increased to 50 mL, 44.9 % and 31.4 % yields of methyl salicylate and linalyl ferulate, respectively, were achieved.

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Aloy, A. S., T. I. Kol'tsova, N. V. Sapozhnikova i A. V. Strelnikov. "Porous Alumina-Silica (Gubka) as a Matrix for REE-TUE Strip Solution Immobilization". MRS Proceedings 932 (2006). http://dx.doi.org/10.1557/proc-932-56.1.

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ABSTRACTThe immobilisation of strip product (TUE + REE), collected at Russian research centers and laboratories during R&D on partitioning technology for liquid high–level radioactive waste (HLW), was studied using simulated solutions.Ultraporous glass crystalline material “Gubka”(G) and multiple processing stages were used to immobilize the simulated strip product. The processing consisted of the following stages: Gubka saturation by solution – drying into Gubka pores – compaction by cold uniaxial pressing followed by sintering (CUPS) or hot uniaxial pressing (HUP).

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