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Gorgani L, Mohammadi M, Najafpour GD, Nikzad M. Sequential Microwave-Ultrasound-Assisted Extraction for Isolation of Piperine from Black Pepper (Piper nigrum L.). FOOD BIOPROCESS TECH 2017. [DOI: 10.1007/s11947-017-1994-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Zieliński M, Dębowski M. The Possibility of Hybrid-Bioreactor Heating by the Microwave Radiation. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2017. [DOI: 10.1515/ijcre-2016-0115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The hybrid bioreactor heated by microwave or conventional by hot water jacket is presented. The reactor consisted of two functional sections. The upper section was constituted by an unsinkable anaerobic biological bed, whereas the bottom section – by suspended anaerobic activated sludge. Both sections were closed in one casing. The study was conducted in mesophilic (35 °C) and thermophilic (55 °C) conditions. Depending on the method of heating, the homogeneity of the temperature field in both functional parts of the reactor was determined. In mesophilic conditions only at measurement points located directly under the wave-guide the temperatures were significantly higher than in the other zones inside the reactor. This implies that it is possible to homogenous heat of the bioreactor in semi-technical scale by microwave irradiation. Under thermophilic conditions a homogenous field of temperature was obtained in the upper and in the bottom section of the bioreactor, however, significant differences were found in values of the temperature between the particular sections of the bioreactor.
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Affiliation(s)
- Marcin Zieliński
- Department of Environment Engineering , University of Warmia and Mazury , Warszawska 117, 10–720 Olsztyn , Poland
| | - Marcin Dębowski
- Department of Environment Engineering , University of Warmia and Mazury , Warszawska 117, 10–720 Olsztyn , Poland
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Ravichandran M, Oza G, Velumani S, Ramirez JT, Garcia-Sierra F, Andrade NB, Vera A, Leija L, Garza-Navarro MA. Plasmonic/Magnetic Multifunctional nanoplatform for Cancer Theranostics. Sci Rep 2016; 6:34874. [PMID: 27721391 PMCID: PMC5056510 DOI: 10.1038/srep34874] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 09/09/2016] [Indexed: 12/18/2022] Open
Abstract
A multifunctional magneto-plasmonic CoFe2O4@Au core-shell nanoparticle was developed by iterative-seeding based method. This nanocargo consists of a cobalt ferrite kernel as a core (Nk) and multiple layers of gold as a functionalizable active stratum, (named as Nk@A after fifth iteration). Nk@A helps in augmenting the physiological stability and enhancing surface plasmon resonance (SPR) property. The targeted delivery of Doxorubicin using Nk@A as a nanopayload is demonstrated in this report. The drug release profile followed first order rate kinetics optimally at pH 5.4, which is considered as an endosomal pH of cells. The cellular MR imaging showed that Nk@A is an efficient T2 contrast agent for both L6 (r2-118.08 mM-1s-1) and Hep2 (r2-217.24 mM-1s-1) cells. Microwave based magnetic hyperthermia studies exhibited an augmentation in the temperature due to the transformation of radiation energy into heat at 2.45 GHz. There was an enhancement in cancer cell cytotoxicity when hyperthermia combined with chemotherapy. Hence, this single nanoplatform can deliver 3-pronged theranostic applications viz., targeted drug-delivery, T2 MR imaging and hyperthermia.
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Affiliation(s)
- M. Ravichandran
- Program on Nanoscience and Nanotechnology, Av. 2508 National Polytechnic Institute, Gustavo A. Madero, San Pedro Zacatenco, 07360 Mexico City, Mexico
| | - Goldie Oza
- Department of Genetics and Molecular Biology, Av. 2508 National Polytechnic Institute, Gustavo A. Madero, San Pedro Zacatenco, 07360 Mexico City, Mexico
| | - S. Velumani
- Department of Electrical Engineering, Av. 2508 National Polytechnic Institute, Gustavo A. Madero, San Pedro Zacatenco, 07360 Mexico City, Mexico
| | - Jose Tapia Ramirez
- Department of Genetics and Molecular Biology, Av. 2508 National Polytechnic Institute, Gustavo A. Madero, San Pedro Zacatenco, 07360 Mexico City, Mexico
| | - Francisco Garcia-Sierra
- Department of Cell Biology, Av. 2508 National Polytechnic Institute, Gustavo A. Madero, San Pedro Zacatenco, 07360 Mexico City, Mexico
| | - Norma Barragan Andrade
- Department of Cell Biology, Av. 2508 National Polytechnic Institute, Gustavo A. Madero, San Pedro Zacatenco, 07360 Mexico City, Mexico
| | - A. Vera
- Department of Electrical Engineering - Bioelectronics Section, CINVESTAV-IPN, Av. 2508 National Polytechnic Institute, Gustavo A. Madero, San Pedro Zacatenco, 07360 Mexico City
| | - L. Leija
- Department of Electrical Engineering - Bioelectronics Section, CINVESTAV-IPN, Av. 2508 National Polytechnic Institute, Gustavo A. Madero, San Pedro Zacatenco, 07360 Mexico City
| | - Marco A. Garza-Navarro
- Department of Mechanical and Electrical Engineering, Universidad Autonoma de Nuevo Leon, San Nicolás de Los Garza, Nuevo León, 66451 Mexico City, Mexico
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Nawaz MI, Hasan N, Wu HF. CoFe2 O4 -ZnO nanoparticles for rapid microwave-assisted tryptic digestion of phosphoprotein and phosphopeptide analysis by matrix-assisted laser desorption/ionization mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2016; 30:1443-1453. [PMID: 27321831 DOI: 10.1002/rcm.7559] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Revised: 03/08/2016] [Accepted: 03/10/2016] [Indexed: 06/06/2023]
Abstract
RATIONALE Phosphorylation is a post-translational modification of proteins that plays very important role in a large number of biological processes. However, despite recent advancements in phosphoproteome research, large-scale detection and characterization of phosphopeptides by mass spectrometry (MS) is still a challenging task due to the low abundance of phosphopeptides and sub-stoichiometric nature of phosphorylation sites. On-particle microwave-assisted trypsin digestion of phosphoproteins and enrichment of phosphopeptides is an effective method for identification/characterization of phosphopeptides. Magnetic nanoparticles typically can absorb microwave radiation and generate heat in order to resolve complex phosphproteins and to enhance the digestion rate and capture the phosphopeptides on their modified surfaces. METHODS In this study, we used a cheap and efficient method for rapid microwave-assisted tryptic digestion of phosphoproteins and simultaneous enrichment of phosphopeptides using CoFe2 O4 -ZnO magnetic nanoparticles. Using this technique, the digestion time of phosphoproteins can be reduced and the phosphopeptides can be quickly analyzed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOFMS). For the first time, we have applied CoFe2 O4 -ZnO magnetic nanoparticles for enrichment of phosphopeptides from standard phosphoproteins (β-casein and ovalbumin), complex samples (human serum and egg white) and a protein mixture of β-casein and BSA (1:100). RESULTS Our results demonstrate that the capture efficiency of CoFe2 O4 -ZnO nanoparticles for β-casein and ovalbumin in MALDI-TOFMS is very high (detection limits 0.2 fmol and 20 fmol, respectively). The CoFe2 O4 -ZnO nanoparticles have high affinity for phosphopeptide enrichment for β-casein in complex mixtures with BSA at 1:10 and 1:100 molar ratios in the microwave within 30 s. CONCLUSIONS Compared with other reported magnetic nanoparticles, the CoFe2 O4 -ZnO nanoparticles are easy to prepare and handle, and can save time in the phosphopeptide enrichment procedure, making these nanoparticle a good choice for highly sensitive phosphopeptide enrichment. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Mohd Imtiaz Nawaz
- Department of Chemistry and Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung, 70 Lien-Hai Road, Kaohsiung, 80424, Taiwan
| | - Nazim Hasan
- Department of Chemistry and Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung, 70 Lien-Hai Road, Kaohsiung, 80424, Taiwan
- Department of Chemistry, Faculty of Medicine, Jazan University, Jazan, 82621, KSA
| | - Hui-Fen Wu
- Department of Chemistry and Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung, 70 Lien-Hai Road, Kaohsiung, 80424, Taiwan
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, 807, Taiwan
- Doctoral Degree Program in Marine Biotechnology, National Sun Yat - Sen University and Academia Sinica, Kaohsiung, 80424, Taiwan
- Institute of Medical Science and Technology, National Sun Yat-Sen University, Kaohsiung, 80424, Taiwan
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Walsh D, Kim YY, Miyamoto A, Meldrum FC. Synthesis of macroporous calcium carbonate/magnetite nanocomposites and their application in photocatalytic water splitting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:2168-2172. [PMID: 21626686 DOI: 10.1002/smll.201100268] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Indexed: 05/30/2023]
Affiliation(s)
- Dominic Walsh
- School of Chemistry, University of Bristol, Bristol BS8 1TS, UK.
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Highly selective and sensitive enrichment of phosphopeptides via NiO nanoparticles using a microwave-assisted centrifugation on-particle ionization/enrichment approach in MALDI-MS. Anal Bioanal Chem 2011; 400:3451-62. [PMID: 21533801 DOI: 10.1007/s00216-011-5016-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Revised: 04/12/2011] [Accepted: 04/12/2011] [Indexed: 10/18/2022]
Abstract
The strategy to concentrate phosphopeptides has become a critical issue for mapping protein phosphorylation sites, which are well known as posttranslational modifications in proteomics. In this study, we propose a simple and highly sensitive method for phosphopeptide enrichment on NiO nanoparticles (NPs) from a trypsin predigested phosphoprotein complex solution in a microwave oven. Furthermore, this technique was combined with centrifugation on-particle ionization/enrichment of phosphopeptides and phosphopeptides were analyzed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Weak magnetism of these NPs and a positive surface charge effect at low pH accomplished rapid and selective phosphopeptide enrichment within 30s. Trypsin-digested products of phosphoproteins such as α-casein and β-casein, human blood serum, nonfat milk, and egg white were also investigated to explore their phosphopeptide enrichment from complex samples by this approach. The results demonstrate that NiO NPs exhibit good affinity to trace the phosphopeptides even in the presence of 30 times higher molar concentration of complex solution of non-phosphopeptide proteolytic predigested bovine serum albumin. The detection limits of NiO NPs for α-casein and β-casein were 2.0 × 10(-9) M, with good signal-to-noise ratio in the mass spectrum. NiO NPs were found to be effective and selective for enrichment of singly and multiply phosphorylated peptides at a trace level in complex samples in a microwave oven. The cost of preparing NiO NPs is low, the NiO NPs are thermally stable, and therefore, they hold great promise for use in phosphopeptide enrichment.
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Yu W, Xie H, Chen L, Li Y, Zhang C. Synthesis and Characterization of Monodispersed Copper Colloids in Polar Solvents. NANOSCALE RESEARCH LETTERS 2009; 4:465-470. [PMID: 20628634 PMCID: PMC2898482 DOI: 10.1007/s11671-009-9264-3] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2008] [Accepted: 01/27/2009] [Indexed: 05/15/2023]
Abstract
A chemical reduction method for preparing monodispersed pure-phase copper colloids in water and ethylene glycol has been reported. Owing to the reduction property of ethylene glycol, the reaction rate in ethylene glycol is higher than that in water. In addition, the amount of reducing agent can be reduced largely. Ascorbic acid plays roles as reducing agent and antioxidant of colloidal copper, due to its ability to scavenge free radicals and reactive oxygen molecules. Thermogravimetric results reveal that the as-prepared copper nanoparticles have good stability, and they begin to be oxidized at above 210 degrees C. Polyvinyl pyrrolidone works both as size controller and polymeric capping agents, because it hinders the nuclei from aggregation through the polar groups, which strongly absorb the copper particles on the surface with coordination bonds.
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Affiliation(s)
- Wei Yu
- School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai, 201209, China
| | - Huaqing Xie
- School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai, 201209, China
| | - Lifei Chen
- School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai, 201209, China
| | - Yang Li
- School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai, 201209, China
| | - Chen Zhang
- School of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai, 201209, China
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Lattuada M, Hatton TA. Preparation and Controlled Self-Assembly of Janus Magnetic Nanoparticles. J Am Chem Soc 2007; 129:12878-89. [PMID: 17910450 DOI: 10.1021/ja0740521] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Janus magnetic nanoparticles (~20 nm) were prepared by grafting either polystyrene sodium sulfonate (PSSNa) or polydimethylamino ethylmethacrylate (PDMAEMA) to the exposed surfaces of negatively charged poly(acrylic acid) (PAA)-coated magnetite nanoparticles adsorbed onto positively charged silica beads. Individually dispersed Janus nanoparticles were obtained by repulsion from the beads on reversal of the silica surface charge when the solution pH was increased. Controlled aggregation of the Janus nanoparticles was observed at low pH values, with the formation of stable clusters of approximately 2-4 times the initial size of the particles. Cluster formation was reversed, and individually dispersed nanoparticles recovered, by restoring the pH to high values. At intermediate pH values, PSSNa Janus nanoparticles showed moderate clustering, while PDMAEMA Janus nanoparticles aggregated uncontrollably due to dipolar interactions. The size of the stable clusters could be controlled by increasing the molecular weight of the grafted polymer, or by decreasing the magnetic nanoparticle surface availability for grafting, both of which yielded larger cluster sizes. The addition of small amounts of PAA-coated magnetic nanoparticles to the Janus nanoparticle suspension resulted in a further increase in the final cluster size. Monte Carlo simulation results compared favorably with experimental observations and showed the formation of small, elongated clusters similar in structure to those observed in cryo-TEM images.
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Affiliation(s)
- Marco Lattuada
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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Chen WY, Chen YC. Acceleration of Microwave-Assisted Enzymatic Digestion Reactions by Magnetite Beads. Anal Chem 2007; 79:2394-401. [PMID: 17284012 DOI: 10.1021/ac0614893] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, we demonstrated that microwave-assisted enzymatic digestion could be greatly accelerated by multifunctional magnetite beads. The acceleration of microwave-assisted enzymatic digestion by the presence of the magnetite beads was attributable to several features of the beads. Their capacity to absorb microwave radiation leads to rapid heating of the beads. Furthermore, their negatively charged functionalities cause adsorption of proteins with opposite charges onto their surfaces by electrostatic interactions, leading to a concentration on the surfaces of the beads of proteins present in trace amounts in the solution. The adsorbed proteins are denatured and hence rendered vulnerable to enzymatic digestion and are digested on the beads. For microwave heating, 30 s was sufficient for carrying out the tryptic digestion of cytochrome c, in the presence of magnetite beads, while 1 min was adequate for tryptic digestion of myoglobin. The digestion products were characterized by MALDI-MS. This rapid enzymatic digestion allowed the entire time for identification of proteins to be greatly reduced. Furthermore, specific proteins present in trace quantities were enriched from the sample on the magnetite beads and could be rapidly isolated from the sample by employing an external magnetic field. These multiple roles of magnetite beads, as the absorber for microwave irradiation, the concentrating probe, and the agent for unfolding proteins, contributed to their capability of accelerating microwave-assisted enzymatic digestion. We also demonstrated that trypsin immobilized magnetite beads were suitable for use in microwave-assisted enzymatic digestion.
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Affiliation(s)
- Wei-Yu Chen
- Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, Hsinchu 300, Taiwan
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Lin S, Lin Z, Yao G, Deng C, Yang P, Zhang X. Development of microwave-assisted protein digestion based on trypsin-immobilized magnetic microspheres for highly efficient proteolysis followed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry analysis. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2007; 21:3910-3918. [PMID: 17990248 DOI: 10.1002/rcm.3283] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In this study, very easily prepared trypsin-immobilized magnetic microspheres were applied in microwave-assisted protein digestion and firstly applied for proteome analysis by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS). Magnetic microspheres with small size were synthesized and modified by 3-glycidoxypropyltrimethoxysilane (GLYMO). Trypsin was immobilized onto magnetic microspheres through only a one-step reaction of its amine group with GLYMO. When these easily prepared trypsin-immobilized magnetic microspheres were applied in microwave-assisted protein digestion, the magnetic microspheres not only functionalized as substrate for trypsin immobilization, but also as an excellent microwave absorber and thus improved the efficiency of microwave-assisted digestion greatly. Cytochrome c was used as a model protein to verify its digestion efficiency. Without any additives such as organic solvents or urea, peptide fragments produced in 15 s could be confidently identified by MALDI-TOF-MS and better digestion efficiency was obtained comparing to conventional in-solution digestion (12 h). Besides, with an external magnet, trypsin could be used repeatedly and at the same time no contaminants were introduced into the sample solution. It was verified that the enzyme maintained high activity after seven runs. Furthermore, reversed-phase liquid chromatography (RPLC) fractions of rat liver extract were also successfully processed using this novel method. These results indicated that this fast and efficient digestion method, which combined the advantages of immobilized trypsin and microwave-assisted protein digestion, will greatly hasten the application of top-down proteomic techniques for large-scale analysis in biological and clinical research.
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Affiliation(s)
- Shuang Lin
- Department of Chemistry & Institute of Biomedical Sciences, Fudan University, Shanghai 200433, China
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Latha C. Microwave-assisted extraction of embelin from Embelia ribes. Biotechnol Lett 2006; 29:319-22. [PMID: 17124632 DOI: 10.1007/s10529-006-9243-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2006] [Revised: 10/16/2006] [Accepted: 10/17/2006] [Indexed: 10/23/2022]
Abstract
A rapid and efficient microwave-assisted extraction (MAE) process for the selective extraction of embelin from Embelia ribes was developed. Solvent selection, microwave energy input and solid loading were optimized. The rate of extraction and purity of embelin depended upon the solvent used and exposure time to microwaves. Maximum MAE was achieved in acetone with total yield of 92% (w/w) embelin with 90% (w/w) purity with 1% (w/v) raw material loading at 150 W power level in 80 s. Non-polar solvents, such as hexane and dichloromethane, were not effective for the selective extraction of embelin.
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Affiliation(s)
- C Latha
- Department of Biochemistry, Indian Institute of Science, Bangalore, India.
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Abstract
Organometallic strategies normally employed for the production of semiconductor quantum dots have been successfully applied to the synthesis of metal nanoparticles. By controlling parameters such as capping agents, reaction temperature and precursor chemistry, precise nanostructures can be obtained that exhibit highly desirable magnetic, optical and catalytic properties.
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Affiliation(s)
- Mark Green
- Department of Physics, King's College London, Strand, London, UKWC2R 2LS.
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Kim SI, Watabe Y, Aida T, Niiyama H. Complete Oxidation of Ethylene by Co-Modified Mordenites under Microwave Irradiation. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2005. [DOI: 10.1252/jcej.38.828] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Seong-Ick Kim
- Department of Chemical Engineering, Tokyo Institute of Technology
| | - Yoshihide Watabe
- Department of Chemical Engineering, Tokyo Institute of Technology
| | - Takashi Aida
- Department of Chemical Engineering, Tokyo Institute of Technology
| | - Hiroo Niiyama
- Global Scientific Information and Computer Center, Tokyo Institute of Technology
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Microwave-induced esterification using heterogeneous acid catalyst in a low dielectric constant medium. J Org Chem 2000; 65:1210-4. [PMID: 10814074 DOI: 10.1021/jo990515c] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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