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Silva FWL, Name LL, Tiba DY, Braz BF, Santelli RE, Canevari TC, Cincotto FH. High sensitivity, low-cost, and disposability: A novel screen-printed electrode developed for direct electrochemical detection of the antibiotic ceftriaxone. Talanta 2024; 266:125075. [PMID: 37591152 DOI: 10.1016/j.talanta.2023.125075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 08/07/2023] [Accepted: 08/10/2023] [Indexed: 08/19/2023]
Abstract
This study describes the development of a novel disposable and low-cost electrochemical platform for detecting the antibiotic ceftriaxone. The screen-printed electrode has been modified with a novel hybrid nanostructure containing silicon oxide (SiO2), zirconium oxide (ZrO2), and nitrogen-doped carbon quantum dots (Cdot-N). Different techniques like Fourier-transform infrared spectroscopy, Raman spectroscopy, and transmission electron microscopy characterized the hybrid nanostructure used in the sensor surface modifier material. The hybrid nanostructure showed an excellent synergistic effect that contributed to the oxidation reaction of ceftriaxone. The screen-printed electrode modified with SiO2/ZrO2/Cdot-N nanostructure presented high sensitivity with a detection limit of 0.2 nmol L-1 in the linear range of 0.0078-40.02 μmol L-1. The measurements have been performed by square wave voltammetry technique. Studies on real samples of synthetic urine, urine, and tap water showed 95%-105% recovery without applying any sample pretreatment. The sensor demonstrated excellent selectivity in the antibiotic ceftriaxone determination in the presence of possible interferences cationic, Na+, K+, Ca2+, Mg2+, Cu2+, Pb2+, Mn2+, Zn2+, Co2+, and biological, glucose, caffeine, uric acid, and ascorbic acid. The developed sensor becomes a selective, sensitive, and applicable tool in determining the antibiotic ceftriaxone.
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Affiliation(s)
- Francisco Walison Lima Silva
- Departamento de Química Analítica, Instituto de Química, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Luccas L Name
- LabNaHm: Multifunctional Hybrid Nanomaterials Laboratory. Engineering School, Mackenzie Presbyterian University, 01302-907, São Paulo, SP, Brazil
| | - Daniel Y Tiba
- LabNaHm: Multifunctional Hybrid Nanomaterials Laboratory. Engineering School, Mackenzie Presbyterian University, 01302-907, São Paulo, SP, Brazil
| | - Bernardo Ferreira Braz
- Departamento de Química Analítica, Instituto de Química, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ricardo Erthal Santelli
- Departamento de Química Analítica, Instituto de Química, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil; National Institute of Science & Technology of Bioanalytics (INCTBio), Campinas, Brazil
| | - Thiago C Canevari
- LabNaHm: Multifunctional Hybrid Nanomaterials Laboratory. Engineering School, Mackenzie Presbyterian University, 01302-907, São Paulo, SP, Brazil
| | - Fernando Henrique Cincotto
- Departamento de Química Analítica, Instituto de Química, Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil; National Institute of Science & Technology of Bioanalytics (INCTBio), Campinas, Brazil.
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2
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Gemenetzi A, Moularas C, Belles L, Deligiannakis Y, Louloudi M. Reversible Plasmonic Switch in a Molecular Oxidation Catalysis Process. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aikaterini Gemenetzi
- Laboratory of Biomimetic Catalysis & Hybrid Materials, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
| | - Constantinos Moularas
- Laboratory of Physical Chemistry of Materials & Environment, Department of Physics, University of Ioannina, Ioannina 45110, Greece
| | - Loukas Belles
- Laboratory of Physical Chemistry of Materials & Environment, Department of Physics, University of Ioannina, Ioannina 45110, Greece
| | - Yiannis Deligiannakis
- Laboratory of Physical Chemistry of Materials & Environment, Department of Physics, University of Ioannina, Ioannina 45110, Greece
| | - Maria Louloudi
- Laboratory of Biomimetic Catalysis & Hybrid Materials, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
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3
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Kasi V, Sedaghat S, Alcaraz AM, Maruthamuthu MK, Heredia-Rivera U, Nejati S, Nguyen J, Rahimi R. Low-Cost Flexible Glass-Based pH Sensor via Cold Atmospheric Plasma Deposition. ACS APPLIED MATERIALS & INTERFACES 2022; 14:9697-9710. [PMID: 35142483 DOI: 10.1021/acsami.1c19805] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Many commercially available pH sensors are fabricated with a glass membrane as the sensing component because of several advantages of glass-based electrodes such as versatility, high accuracy, and excellent stability in various conditions. However, because of their bulkiness and poor mechanical properties, conventional glass-based sensors are not ideal for wearable or flexible applications. Here, we report for the first time the fabrication of a flexible glass-based pH sensor suitable for biomedical and environmental applications where flexibility and stability of the sensor are critical for long-term and real-time monitoring. The sensor was fabricated via a simple and facile approach using the cold atmospheric plasma technique in which a pH sensitive silica coating was deposited from a siloxane precursor onto a carbon electrode. In order to increase the sensitivity and stability of the sensor, we employed a postprocessing step which involves annealing of the silica coated electrode at elevated temperatures. This process was optimized to ensure that the crucial properties such as porosity and hydration functionality were balanced to obtain the best and most reliable sensitivity of the sensor. Our sensitivity test results indicated that these sensors exhibit excellent and stable sensitivity with a slope of about 48 mV/pH (r2 = 0.998) and selectivity across a pH range of 4 to 10 in the presence of various cations. The optimized sensor has shown stable sensitivity for a long period of time (30 h of immersion) and in different bending conditions. We demonstrate in this investigation that this flexible cost-effective pH sensor can withstand the sterilization process resulting from ultraviolet radiation and shows repeatable sensitivity with less than ±5 mV potential drift from the sensitivity values of the standard optimized sensor.
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Affiliation(s)
- Venkat Kasi
- School of Material Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
| | - Sotoudeh Sedaghat
- School of Material Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
| | - Alejandro M Alcaraz
- School of Material Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
| | - Murali Kannan Maruthamuthu
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Ulisses Heredia-Rivera
- School of Material Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
| | - Sina Nejati
- School of Material Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
| | - Juliane Nguyen
- Division of Pharmacoengineering and Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Rahim Rahimi
- School of Material Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
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Baig MM, Yousuf MA, Alsafari IA, Ali M, Agboola PO, Shakir I, Haider S, Warsi MF. New mesostructured origami silica matrix: a nano-platform for highly retentive and pH-controlled delivery system. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2021. [DOI: 10.1080/16583655.2021.1902176] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Mirza Mahmood Baig
- Department of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Muhammad Asif Yousuf
- Department of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Ibrahim A. Alsafari
- Department of Chemistry, College of Science, University of Hafr Al Batin, Hafr Al Batin, Saudi Arabia
- Department of Biology, College of Science, University of Hafr Al Batin, Hafr Al Batin, Saudi Arabia
| | - Muhammad Ali
- Department of Chemistry, University of Sargodha, Sargodha, Pakistan
| | - Philips O. Agboola
- College of Engineering Al-Muzahmia Branch, King Saud University, Riyadh, Saudi Arabia
| | - Imran Shakir
- Sustainable Energy Technologies (SET) Center, College of Engineering, King Saud University, Riyadh, Saudi Arabia
| | - Sajjad Haider
- Department of Chemical Engineering, College of Engineering, King Saud University, Riyadh, Saudi Arabia
| | - Muhammad Farooq Warsi
- Department of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
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Nanoceria provides antioxidant and osteogenic properties to mesoporous silica nanoparticles for osteoporosis treatment. Acta Biomater 2021; 122:365-376. [PMID: 33359295 DOI: 10.1016/j.actbio.2020.12.029] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 12/02/2020] [Accepted: 12/13/2020] [Indexed: 01/06/2023]
Abstract
Osteoporosis, a chronic metabolic bone disease, is the most common cause of fractures. Drugs for treating osteoporosis generally inhibit osteoclast (OC) activity, but are rarely aimed at encouraging new bone growth and often cause severe systemic side effects. Reactive oxygen species (ROS) are one of the key triggers of osteoporosis, by inducing osteoblast (OB) and osteocyte apoptosis and promoting osteoclastogenesis. Here we tested the capability of the ROS-scavenger nanoceria encapsulated within mesoporous silica nanoparticles (Ce@MSNs) to treat osteoporosis using a pre-osteoblast MC3T3-E1 cell monoculture in stressed and normal conditions. Ce@MSNs (diameter of 80 ± 10 nm) were synthesised following a scalable two-step process involving sol-gel and wet impregnation methods. The Ce@MSNs at concentration of 100 μg mL-1 induced a significant reduction in oxidative stress produced by t-butyl hydroperoxide and did not alter cell viability significantly. Confocal microscopy showed that MSNs and Ce@MsNs were internalised into the cytoplasm of the pre-osteoblasts after 24 h but were not in the nucleus, avoiding any DNA and RNA modifications. Ce@MSNs provoked mineralisation of the pre-osteoablasts without osteogenic supplements, which did not occur when the cells were exposed to MSN without nanoceria. In a co-culture system of MC3T3-E1 and RAW264.7 macrophages, the Ce@MSNs exhibited antioxidant capability and stimulated cell proliferation and osteogenic responses without adding osteogenic supplements to the culture. The work brings forward an effective platform based for facile synthesis of Ce@MSNs to interact with both OBs and OCs for treatment of osteoporosis.
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Zhu C, Zhang Y, Ma Z, Wang H, Sly GL. Yolk-void-shell Si-C nano-particles with tunable void size for high-performance anode of lithium ion batteries. NANOTECHNOLOGY 2021; 32:085403. [PMID: 33147572 DOI: 10.1088/1361-6528/abc77f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Silicon is a promising anode for new-generation lithium ion batteries due to high theoretical lithium storage capacity (4200 mAh g-1). However, the low conductivity and large volumetric expansion hamper the commercialization of the silicon anode. In this case, we present a yolk-void-shell Si-C anode (denoted as Si@Void@C), which is synthesized through nano-Si oxidation, surface carbonization and etching of SiO x . The void can be fabricated only by the self-generation and etching of SiO x layer on the Si surface, without the help of template materials. Moreover, the void size can be adjusted only by means of the annealing temperature, which can be easily and precisely operated. The Si@Void@C/rGO with void size of 5 nm offers a discharge capacity of 1294 mAh g-1 after 100 cycles at a current density of 500 mA g-1. These enhanced performances can be ascribed to an appropriate size (5 nm) of void space which sufficiently accommodates the silicon volume expansion and stabilizes the carbon shell. At the same time, the voids effectively inhibit the growth of the solid electrolyte interface layer by depressing the decomposition of the electrolyte on the surface of Si in Si@Void@C/rGO. Furthermore, interfaces between Si@Void@C particles and rGO sheets construct bridges for electrons' conduction. In general, the present work provides a viable strategy for synthesizing silicon-carbon anode materials with long life.
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Affiliation(s)
- Chaoye Zhu
- School of Materials Science and Engineering, Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing 211189, People's Republic of China
| | - Yao Zhang
- School of Materials Science and Engineering, Jiangsu Key Laboratory of Advanced Metallic Materials, Southeast University, Nanjing 211189, People's Republic of China
| | - Zhihong Ma
- School of Materials Science & Engineering, Baise University, Baise 533000, Guangxi, People's Republic of China
| | - Hui Wang
- School of Materials Science and Engineering and Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, South China University of Technology, Guangzhou 510641, People's Republic of China
| | - Gunnar L Sly
- Voiland College of Engineering and Architecture, Song Research Group, Washington State University, Pullman, WA 99164, United States of America
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Bueno OMVM, Herrera CL, Bertran CA, San-Miguel MA, Lopes JH. An experimental and theoretical approach on stability towards hydrolysis of triethyl phosphate and its effects on the microstructure of sol-gel-derived bioactive silicate glass. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 120:111759. [PMID: 33545900 DOI: 10.1016/j.msec.2020.111759] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 11/16/2020] [Accepted: 11/21/2020] [Indexed: 11/19/2022]
Abstract
The sol-gel method is versatile and one of the well-established synthetic approaches for preparing bioactive glass with improved microstructure. In a successful approach, alkoxide precursors undergo rapid hydrolysis, followed by immediate condensation leading to the formation of three-dimensional gels. On the other hand, a slow kinetics rate for hydrolysis of one or more alkoxide precursors generates a mismatch in the progression of the consecutive reactions of the sol-gel process, which makes it difficult to form homogeneous multicomponent glass products. The amorphous phase separation (APS) into the gel is thermodynamically unstable and tends to transform into a crystalline form during the calcination step of xerogel. In the present study, we report a combined experimental and theoretical method to investigate the stability towards hydrolysis of triethyl phosphate (TEP) and its effects on the mechanism leading to phase separation in 58S bioactive glass obtained via sol-gel route. A multitechnical approach for the experimental characterization combined with calculations of functional density theory (DFT) suggest that TEP should not undergo hydrolysis by water under acidic conditions during the formation of the sol or even in the gel phase. The activation energy barrier (ΔG‡) showed a height of about 20 kcal·mol-1 for the three stages of hydrolysis and the reaction rates calculated for each stage of TEP hydrolysis were kFHR = 7.0 × 10-3s-1, kSHR = 6.8 × 10-3s-1 and kTHR = 3.5 × 10-3s-1. These results show that TEP remains in the non-hydrolyzed form segregated within the xerogel matrix until its thermal decomposition in the calcination step, when P species preferentially associate with calcium ions (labile species) and other phosphate groups present nearby, forming crystalline domains of calcium pyrophosphates permeated by the silica-rich glass matrix. Together, our data expand the knowledge about the synthesis by the sol-gel method of bioactive glass and establishes a mechanism that explains the role played by the precursor source of phosphorus (TEP) in the phase separation, an event commonly observed for these biomaterials.
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Affiliation(s)
- Otto Mao Vargas Machuca Bueno
- Department of Physical Chemistry, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil.
| | - Christian Leonardo Herrera
- Department of Physical Chemistry, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | - Celso Aparecido Bertran
- Department of Physical Chemistry, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | - Miguel Angel San-Miguel
- Department of Physical Chemistry, Institute of Chemistry, University of Campinas - UNICAMP, P.O. Box 6154, 13083-970 Campinas, SP, Brazil
| | - João Henrique Lopes
- Department of Chemistry, Division of Fundamental Sciences (IEF), Aeronautics Institute of Technology - ITA, 12228-900 Sao Jose dos Campos, SP, Brazil.
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Baig MM, Zulfiqar S, Yousuf MA, Shakir I, Aboud MFA, Warsi MF. Dy xMnFe 2-xO 4 nanoparticles decorated over mesoporous silica for environmental remediation applications. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123526. [PMID: 32758998 DOI: 10.1016/j.jhazmat.2020.123526] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 06/09/2020] [Accepted: 06/25/2020] [Indexed: 06/11/2023]
Abstract
An efficient, environment-friendly and economical catalyst to control contaminants of environment is an enduring interest in recent years. In this study, a new composite, DyxMnFe2-xO4nanoparticles decorated over mesoporous silica was synthesized and utilized for removal of organic pollutant. Highly crystalline nature of DyxMnFe2-xO4 nanoparticles and amorphous nature of material was confirmed by XRD (X-ray diffraction) technique. Infrared spectra of fabricated material before and after adsorption of dye molecules evidenced the successful adsorption of dye molecules by fabricated adsorbent. From field emission scanning electron microscopic (FESEM) images of Dy3+ substituted MnFe2O4 composite with mesoporous silica, it was clearly observed that ferrite particles of size 20-30 nm were decorated on the surface of mesoporous silica particles and distributed well over spherical silica balls homogeneously. Its magnificent mesoporous nature was revealed from BET (nitrogen adsorption-desorption measurements) analysis. Surface area, pore volume and average pore size was found 387.95 m2/g, 0.390 cm3/g and 4.02 nm respectively. Tri-modal pore size distribution showed its effective utilization in adsorption. The abundant (SiOH) hydroxyl groups of mesoporous silica, the broad diffraction hump of silica depicted its superior loading capacity of target molecular specie inside its porous network. From band gap analysis, a red shift of 2.43 eV exhibited semiconductor photocatalysis of DyxMnFe2-xO4 nanoparticles. Degradation efficiency of bare MnFe2O4, DyxMnFe2-xO4 and mesoporous silica-based composite was tested using crystal violet dye. Its explored adsorption-photocatalysis synergy, degradation mechanism, kinetic investigation, easily recovery and remarkable recycling ability suggested that the new fabricated composite is best for environmental remediation.
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Affiliation(s)
- Mirza Mahmood Baig
- Department of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | - Sonia Zulfiqar
- Department of Chemistry, School of Sciences & Engineering, The American University in Cairo, New Cairo, 11835, Egypt
| | - Muhammad Asif Yousuf
- Department of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | - Imran Shakir
- Sustainable Energy Technologies (SET) Center, College of Engineering, King Saud University, PO-BOX 800, Riyadh, 11421, Saudi Arabia
| | - Mohamed F Aly Aboud
- Sustainable Energy Technologies (SET) Center, College of Engineering, King Saud University, PO-BOX 800, Riyadh, 11421, Saudi Arabia
| | - Muhammad Farooq Warsi
- Department of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan.
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Selyanchyn O, Selyanchyn R, Fujikawa S. Critical Role of the Molecular Interface in Double-Layered Pebax-1657/PDMS Nanomembranes for Highly Efficient CO 2/N 2 Gas Separation. ACS APPLIED MATERIALS & INTERFACES 2020; 12:33196-33209. [PMID: 32589389 DOI: 10.1021/acsami.0c07344] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this work, we deposited a CO2-selective block copolymer, Pebax-1657, as a selective layer with a thickness of 2-20 nm on the oxygen plasma-activated surface of poly(dimethylsiloxane) (PDMS) used as a gutter layer (thickness ∼400 nm). This double-layered structure was subsequently transferred onto the polyacrylonitrile (PAN) microporous support and studied for CO2/N2 separation. The effect of interfacial molecular arrangements between the selective and gutter layers on CO2 permeance and selectivity has been investigated. We have revealed that the gas permeance and selectivity do not follow the conventional theoretical predictions for the multilayer membrane (resistance in series transport model); specifically, more selective CO2/N2 separation membranes were achieved with ultrathin selective layers. Detailed characterization of the chemical structure of the outermost membrane surface suggests that nanoscale blending of the ultrathin Pebax-1657 layer with O2 plasma-activated PDMS chains on the surface takes place. This nanoblending at the interface between the selective and gutter layers played a critical role in enhancing the CO2/N2 selectivity. CO2 permeances in the developed thin-film composite membranes (TFCM) were between 1200 and 3500 gas permeance units (GPU) and the respective CO2/N2 selectivities were between 72 and 23, providing the gas separation performance suitable for CO2 capture in postcombustion processes. This interpenetrating polymer interface enhanced the overall selectivity of the membrane significantly, exceeding the separation ability of the pristine Pebax-1657 polymer.
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Affiliation(s)
- Olena Selyanchyn
- WPI International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Roman Selyanchyn
- WPI International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Shigenori Fujikawa
- WPI International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Center for Molecular Systems (CMS), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- NanoMembrane Technologies Inc., 4-1, Kyudai-Shimachi, Nishi-ku, Fukuoka 819-0388, Japan
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10
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Lucia A, Bacher M, van Herwijnen HWG, Rosenau T. A Direct Silanization Protocol for Dialdehyde Cellulose. Molecules 2020; 25:E2458. [PMID: 32466232 PMCID: PMC7287999 DOI: 10.3390/molecules25102458] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 05/20/2020] [Accepted: 05/22/2020] [Indexed: 02/02/2023] Open
Abstract
Cellulose derivatives have many potential applications in the field of biomaterials and composites, in addition to several ways of modification leading to them. Silanization in aqueous media is one of the most promising routes to create multipurpose and organic-inorganic hybrid materials. Silanization has been widely used for cellulosic and nano-structured celluloses, but was a problem so far if to be applied to the common cellulose derivative "dialdehyde cellulose" (DAC), i.e., highly periodate-oxidized celluloses. In this work, a straightforward silanization protocol for dialdehyde cellulose is proposed, which can be readily modified with (3-aminopropyl)triethoxysilane. After thermal treatment and freeze-drying, the resulting product showed condensation and cross-linking, which was studied with infrared spectroscopy and 13C and 29Si solid-state nuclear magnetic resonance (NMR) spectroscopy. The cross-linking involves both links of the hydroxyl group of the oxidized cellulose with the silanol groups (Si-O-C) and imine-type bonds between the amino group and keto functions of the DAC (-HC=N-). The modification was achieved in aqueous medium under mild reaction conditions. Different treatments cause different levels of hydrolysis of the organosilane compound, which resulted in diverse condensed silica networks in the modified dialdehyde cellulose structure.
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Affiliation(s)
- Arianna Lucia
- Wood K Plus–Competence Center for Wood Composites and Wood Chemistry, Kompetenzzentrum Holz GmbH, Altenberger Straße 69, A-4040 Linz, Austria; (A.L.); (H.W.G.v.H.)
- Institute for Chemistry of Renewable Resources, University of Natural Resources and Life Science Vienna (BOKU), Konrad-Lorenz-Straße 24, A-3430 Tulln an der Donau, Austria;
| | - Markus Bacher
- Institute for Chemistry of Renewable Resources, University of Natural Resources and Life Science Vienna (BOKU), Konrad-Lorenz-Straße 24, A-3430 Tulln an der Donau, Austria;
| | - Hendrikus W. G. van Herwijnen
- Wood K Plus–Competence Center for Wood Composites and Wood Chemistry, Kompetenzzentrum Holz GmbH, Altenberger Straße 69, A-4040 Linz, Austria; (A.L.); (H.W.G.v.H.)
| | - Thomas Rosenau
- Institute for Chemistry of Renewable Resources, University of Natural Resources and Life Science Vienna (BOKU), Konrad-Lorenz-Straße 24, A-3430 Tulln an der Donau, Austria;
- Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Porthansgatan 3, FI-20500 Åbo/Turku, Finland
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11
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Maciel MM, Patrício SG, Borges J, Levkin PA, Correia TR, Mano JF. Thin Silica‐Based Microsheets with Controlled Geometry. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Marta M. Maciel
- CICECO Aveiro Institute of Materials Department of Chemistry University of Aveiro Complexo de Laboratórios Tecnológicos Campus Universitário de Santiago 3810‐193 Aveiro Portugal
- Centre of Biological Engineering (CEB) University of Minho Campus de Gualtar 4710‐057 Braga Portugal
| | - Sónia G. Patrício
- CICECO Aveiro Institute of Materials Department of Chemistry University of Aveiro Complexo de Laboratórios Tecnológicos Campus Universitário de Santiago 3810‐193 Aveiro Portugal
| | - João Borges
- CICECO Aveiro Institute of Materials Department of Chemistry University of Aveiro Complexo de Laboratórios Tecnológicos Campus Universitário de Santiago 3810‐193 Aveiro Portugal
| | - Pavel A. Levkin
- Institute of Biological and Chemical Systems‐Functional Molecular Systems (IBCS‐FMS) Karlsruhe Institute of Technology (KIT) 76344 Eggenstein‐Leopoldshafen Germany
| | - Tiago R. Correia
- CICECO Aveiro Institute of Materials Department of Chemistry University of Aveiro Complexo de Laboratórios Tecnológicos Campus Universitário de Santiago 3810‐193 Aveiro Portugal
| | - João F. Mano
- CICECO Aveiro Institute of Materials Department of Chemistry University of Aveiro Complexo de Laboratórios Tecnológicos Campus Universitário de Santiago 3810‐193 Aveiro Portugal
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12
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Loretan M, Domljanovic I, Lakatos M, Rüegg C, Acuna GP. DNA Origami as Emerging Technology for the Engineering of Fluorescent and Plasmonic-Based Biosensors. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E2185. [PMID: 32397498 PMCID: PMC7254321 DOI: 10.3390/ma13092185] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 04/30/2020] [Accepted: 05/05/2020] [Indexed: 12/23/2022]
Abstract
DNA nanotechnology is a powerful and promising tool for the development of nanoscale devices for numerous and diverse applications. One of the greatest potential fields of application for DNA nanotechnology is in biomedicine, in particular biosensing. Thanks to the control over their size, shape, and fabrication, DNA origami represents a unique opportunity to assemble dynamic and complex devices with precise and predictable structural characteristics. Combined with the addressability and flexibility of the chemistry for DNA functionalization, DNA origami allows the precise design of sensors capable of detecting a large range of different targets, encompassing RNA, DNA, proteins, small molecules, or changes in physico-chemical parameters, that could serve as diagnostic tools. Here, we review some recent, salient developments in DNA origami-based sensors centered on optical detection methods (readout) with a special emphasis on the sensitivity, the selectivity, and response time. We also discuss challenges that still need to be addressed before this approach can be translated into robust diagnostic devices for bio-medical applications.
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Affiliation(s)
- Morgane Loretan
- Photonic Nanosystems, Department of Physics, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 3, PER08, 1700 Fribourg, Switzerland; (M.L.); (G.P.A.)
| | - Ivana Domljanovic
- Laboratory of Experimental and Translational Oncology, Department of Oncology, Microbiology and Immunology, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, PER17, 1700 Fribourg, Switzerland;
| | - Mathias Lakatos
- Photonic Nanosystems, Department of Physics, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 3, PER08, 1700 Fribourg, Switzerland; (M.L.); (G.P.A.)
| | - Curzio Rüegg
- Laboratory of Experimental and Translational Oncology, Department of Oncology, Microbiology and Immunology, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 18, PER17, 1700 Fribourg, Switzerland;
| | - Guillermo P. Acuna
- Photonic Nanosystems, Department of Physics, Faculty of Science and Medicine, University of Fribourg, Chemin du Musée 3, PER08, 1700 Fribourg, Switzerland; (M.L.); (G.P.A.)
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Alfieri ML, Iacomino M, Napolitano A, d'Ischia M. Reaction-Based, Fluorescent Film Deposition from Dopamine and a Diamine-Tethered, Bis-Resorcinol Coupler. Int J Mol Sci 2019; 20:ijms20184532. [PMID: 31540228 PMCID: PMC6769982 DOI: 10.3390/ijms20184532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 09/05/2019] [Accepted: 09/12/2019] [Indexed: 11/16/2022] Open
Abstract
The reaction-based deposition on various surfaces of an all-organic fluorescent coating is reported here, involving autoxidation of 2 mM dopamine in carbonate buffer at pH 9.0, in the presence of a 1 mM diamine–resorcinol coupler (Bis–Res) prepared from 2,4-dihydroxybenzaldehyde and hexamethylenediamine (HMDA). Spectral analysis of the films coupled with an LC-MS investigation of the yellow fluorescent mixture was compatible with the formation and deposition of HMDA-linked methanobenzofuroazocinone fluorophores. Both the emission properties and hydrophobicity of the film were abated in a reversible manner following exposure to acid vapors. These results provide an entry to efficient and practical fluorescent coating methodologies based on in situ generation and the deposition of wet adhesive, as well as fluorescent materials combining a strongly emitting fluorophore with the film-forming properties of long chain diamines.
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Affiliation(s)
- Maria Laura Alfieri
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, 80126, Naples, Italy.
| | - Mariagrazia Iacomino
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, 80126, Naples, Italy.
| | - Alessandra Napolitano
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, 80126, Naples, Italy.
| | - Marco d'Ischia
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, 80126, Naples, Italy.
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14
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Li W, Li J, Wen J, Wen M, Chen S, Wu Q, Fu Y. Hollow nanostructure of sea-sponge-C/SiC@SiC/C for stable Li +-storage capability. Sci Bull (Beijing) 2019; 64:1152-1157. [PMID: 36659686 DOI: 10.1016/j.scib.2019.06.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 04/30/2019] [Accepted: 06/03/2019] [Indexed: 01/21/2023]
Abstract
For the purpose of stable performance in energy storage systems, a new hollow nanostructure of sea-sponge-C/SiC@SiC/C (SCS/SiC@SiC/C) has been successfully fabricated by the SCS/SiC nanospheres coated with SiC/C shells through an in situ reduction process. Based on SCSs and the carbon shells, the stable hollow structures of SCS/SiC@SiC/C can contain large proportion of active SiC layers, which are adhered to both SCSs and the inner surfaces of carbon shells. Such nanostructured anode enables an excellent cycling stability with a capacity of 612 mAh/g at a current density of 0.5 A/g after 1,800 cycles, achieving an excellent stable Li+-storage capability.
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Affiliation(s)
- Weina Li
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Jiaqi Li
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Jiahao Wen
- School of Electrical Engineering, Chongqing University, Chongqing 400044, China
| | - Ming Wen
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China.
| | - Shipei Chen
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Qingsheng Wu
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, Shanghai 200092, China
| | - Yongqing Fu
- Faculty of Engineering and Environment, Northumbria University, NE1 8ST, UK
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15
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Acherar O, Truong MQ, Robert S, Crispino F, Moret S, Bécue A. Paper characteristics and their influence on the ability of single metal deposition to detect fingermarks. Forensic Chem 2019. [DOI: 10.1016/j.forc.2018.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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16
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Velthoen MEZ, Muñoz-Murillo A, Bouhmadi A, Cecius M, Diefenbach S, Weckhuysen BM. The Multifaceted Role of Methylaluminoxane in Metallocene-Based Olefin Polymerization Catalysis. Macromolecules 2018; 51:343-355. [PMID: 29910511 PMCID: PMC5997399 DOI: 10.1021/acs.macromol.7b02169] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 12/02/2017] [Indexed: 01/26/2023]
Abstract
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In
single-site olefin polymerization catalysis, a large excess
of cocatalyst is often required for the generation of highly active
catalysts, but the reason for this is unclear. In this work, fundamental
insight into the multifaceted role of cocatalyst methylaluminoxane
(MAO) in the activation, deactivation, and stabilization of group
4 metallocenes in the immobilized single-site olefin polymerization
catalyst was gained. Employing probe molecule FT-IR spectroscopy,
it was found that weak Lewis acid sites, inherent to the silica-supported
MAO cocatalyst, are the main responsible species for the genesis of
active metallocenes for olefin polymerization. These weak Lewis acid
sites are the origin of AlMe2+ groups. Deactivation
of metallocenes is caused by the presence of silanol groups on the
silica support. Interaction of the catalyst precursor with these silanol
groups leads to the irreversible formation of inactive metallocenes.
Importantly, a high concentration of MAO (14 wt% Al) on the silica
support is necessary to keep the metallocenes immobilized, hence preventing
metallocene leaching and consequent reactor fouling. Increasing the
loading of the MAO cocatalyst leads to larger amounts of AlMe2+, fewer silanol groups, and less metallocene leaching,
which all result in higher olefin polymerization activity.
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Affiliation(s)
- Marjolein E Z Velthoen
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Ara Muñoz-Murillo
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Abdelkbir Bouhmadi
- Albemarle Europe SPRL, Parc Scientifique de LLN, Rue du Bosquet 9, B-1348 Louvain-la-Neuve, Belgium
| | - Michaël Cecius
- Albemarle Europe SPRL, Parc Scientifique de LLN, Rue du Bosquet 9, B-1348 Louvain-la-Neuve, Belgium
| | - Steve Diefenbach
- Albemarle Corporation, Gulf States Road, Baton Rouge, Louisiana 70801, United States
| | - Bert M Weckhuysen
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
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Bharati R, Suresh S. Biosynthesis of ZnO/SiO 2 nanocatalyst with palash leaves’ powder for treatment of petroleum refinery effluent. RESOURCE-EFFICIENT TECHNOLOGIES 2017. [DOI: 10.1016/j.reffit.2017.08.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Bharat LK, Dugasani SR, Seeta Rama Raju G, Yu JS. Preparation of Eu 3+ ions activated Ca 2La 8(SiO 4) 6O 2 oxyapatite nanophosphors through two-step surfactant-free method and their optical and electrical properties. NANOTECHNOLOGY 2017; 28:375601. [PMID: 28825415 DOI: 10.1088/1361-6528/aa7dad] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Eu3+ ions activated Ca2La8(SiO4)6O2 (CLSO):Eu3+ nanophosphor samples were synthesized by a mixed solvothermal and hydrothermal method. The samples were carefully studied using various characterization techniques. The XRD patterns of CLSO:Eu3+ and CLSO confirmed that the samples were crystallized in hexagonal phase with a space group of P63/m (176). The morphology of the nanoparticles was studied by varying the reaction parameters such as growth, temperature and time. The photoluminescence (PL) excitation and PL emission spectra exhibited the typical Eu3+ bands in the wavelength range of 200-550 nm and 400-750 nm, respectively. The intensity of the [Formula: see text] electric dipole (ED) transition peak was strong in the PL emission spectrum which imparts the red color when observed under ultraviolet light. The ED transition peak intensity increased when the sample was calcined at an elevated temperature of 700 °C, indicating improved asymmetry ratio and good chromaticity coordinates. The electrical properties of the prepared materials were studied by spin-coating the powder dispersed solutions on the silica substrate. The output current values were also measured for the CLSO nanoparticles prepared under different growth conditions. These results showed the advantages of CLSO nanoparticles for their application in optics and feasibility in nanoelectronic and energy harvesting devices.
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Affiliation(s)
- L Krishna Bharat
- Department of Electronic Engineering, Institute for Wearable Convergence Electronics, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea
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Synthesis of enhanced phosphonic functional groups mesoporous silica for uranium selective adsorption from aqueous solutions. Sci Rep 2017; 7:11675. [PMID: 28916797 PMCID: PMC5601954 DOI: 10.1038/s41598-017-11993-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 08/29/2017] [Indexed: 11/08/2022] Open
Abstract
Enhanced phosphonic functional group (PFG)-based mesoporous silicas (MSs) were synthesized by hydrothermal method for uranium [U(VI)] selective adsorption from aqueous solutions. Considering that PFGs are directly related to U(VI) adsorption, the main idea of this research was to synthesize enhanced PFG-MSs and consequently enhance U(VI) adsorption. We synthesized two kinds of MSs based on acetic and phosphoric acids at weakly acidic pH, which allows high-loading phosphonic functionality. The main sodium and phosphonic functionality sources were sodium metasilicate and diethylphosphatoethyltriethoxysilane (DPTS). Adsorption experiment results exhibit enhanced U(VI) adsorption capacity from 55.75 mg/g to 207.6 mg/g for acetic and phosphoric acids, respectively. This finding was due to the enhancement of PFGs by phosphoric acids. The highest adsorption selectivity was 79.82% for U(VI) among the six different elements, including Pb, As, Cu, Mo, Ni, and K. Structural characterization of the samples was performed by Fourier transform infrared, X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Brunauer-Emmett-Teller analysis methods. Element concentrations were measured by inductively coupled plasma optical emission spectrometry. Several parameters affecting adsorption capacity, including pH, contact time, initial U(VI) concentration and solution volume, and adsorbent concentration, were also investigated.
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20
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Enantioselective Transamination in Continuous Flow Mode with Transaminase Immobilized in a Macrocellular Silica Monolith. Catalysts 2017. [DOI: 10.3390/catal7020054] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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21
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Chemical Structure-Biological Activity Models for Pharmacophores' 3D-Interactions. Int J Mol Sci 2016; 17:ijms17071087. [PMID: 27399692 PMCID: PMC4964463 DOI: 10.3390/ijms17071087] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 06/20/2016] [Accepted: 06/27/2016] [Indexed: 02/07/2023] Open
Abstract
Within medicinal chemistry nowadays, the so-called pharmaco-dynamics seeks for qualitative (for understanding) and quantitative (for predicting) mechanisms/models by which given chemical structure or series of congeners actively act on biological sites either by focused interaction/therapy or by diffuse/hazardous influence. To this aim, the present review exposes three of the fertile directions in approaching the biological activity by chemical structural causes: the special computing trace of the algebraic structure-activity relationship (SPECTRAL-SAR) offering the full analytical counterpart for multi-variate computational regression, the minimal topological difference (MTD) as the revived precursor for comparative molecular field analyses (CoMFA) and comparative molecular similarity indices analysis (CoMSIA); all of these methods and algorithms were presented, discussed and exemplified on relevant chemical medicinal systems as proton pump inhibitors belonging to the 4-indolyl,2-guanidinothiazole class of derivatives blocking the acid secretion from parietal cells in the stomach, the 1-[(2-hydroxyethoxy)-methyl]-6-(phenylthio)thymine congeners’ (HEPT ligands) antiviral activity against Human Immunodeficiency Virus of first type (HIV-1) and new pharmacophores in treating severe genetic disorders (like depression and psychosis), respectively, all involving 3D pharmacophore interactions.
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Hu Y, Liu X, Zhang X, Wan N, Pan D, Li X, Bai Y, Zhang W. Bead-curtain shaped SiC@SiO2 core-shell nanowires with superior electrochemical properties for lithium-ion batteries. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2015.12.211] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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23
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Benzyl benzoate and dibenzyl ether from of benzoic acid and benzyl alcohol under microwave irradiation using a SiO2–SO3H catalyst. CATAL COMMUN 2015. [DOI: 10.1016/j.catcom.2015.04.033] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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24
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Park JY, Back SH, Chang SJ, Lee SJ, Lee KG, Park TJ. Dopamine-assisted synthesis of carbon-coated silica for PCR enhancement. ACS APPLIED MATERIALS & INTERFACES 2015; 7:15633-40. [PMID: 26112101 DOI: 10.1021/acsami.5b04404] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Polymerase chain reaction (PCR) has become one of the most popular methods to identify genomic information on cells and tissues as well as to solve crimes and check genetic diseases. Recently, the nanomaterials including nanocomposite and nanoparticles have been considered as a next generation of solution to improve both quality and productivity of PCR. Herein, taking into these demands, carbon-coated silica was synthesized using silica particles via polymerization of biocompatible dopamine (PD) to form polydopamine (PDA) film and carbonization of PDA into graphitic structures. For further investigation of the effects of as-prepared silica, PDA-coated silica (PDA silica), and carbonized PDA silica (C-PDA silica), two different types of genes were adopted to investigate the influences of them in the PCR. Furthermore, the strong interaction between the nanocomposites and PCR reagents including polymerase and primers enables regulation of the PCR performance. The effectiveness of the nanocomposites was also confirmed through adopting the conventional PCR and real-time PCR with two different types of DNA as realistic models and different kinds of analytical methods. These findings could provide helpful insight for the potential application in biosensors and biomedical diagnosis.
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Affiliation(s)
- Ji Young Park
- †Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 156-756, Republic of Korea
| | - Seung Hun Back
- †Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 156-756, Republic of Korea
| | - Sung-Jin Chang
- †Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 156-756, Republic of Korea
| | - Seok Jae Lee
- ‡National Nanofab Center, 291 Daehak-ro, Yuseong-gu, Daejeon 305-806, Republic of Korea
| | - Kyoung G Lee
- ‡National Nanofab Center, 291 Daehak-ro, Yuseong-gu, Daejeon 305-806, Republic of Korea
| | - Tae Jung Park
- †Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 156-756, Republic of Korea
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Lin CA, Ayvaz H, Rodriguez-Saona LE. Application of Portable and Handheld Infrared Spectrometers for Determination of Sucrose Levels in Infant Cereals. FOOD ANAL METHOD 2013. [DOI: 10.1007/s12161-013-9763-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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