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Costa RR, Castro E, Arias FJ, Rodríguez-Cabello JC, Mano JF. Multifunctional Compartmentalized Capsules with a Hierarchical Organization from the Nano to the Macro Scales. Biomacromolecules 2013; 14:2403-10. [DOI: 10.1021/bm400527y] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Rui R. Costa
- 3B’s
Research
Group − Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of
the European Institute of Excellence of Tissue Engineering and Regenerative
Medicine, AvePark, Zona Industrial da Gandra, S. Cláudio do
Barco, 4806-909 Caldas das Taipas, Guimarães, Portugal
- ICVS/3B’s, PT Government Associated Laboratory,
Braga/Guimarães, Portugal
| | - Emilio Castro
- 3B’s
Research
Group − Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of
the European Institute of Excellence of Tissue Engineering and Regenerative
Medicine, AvePark, Zona Industrial da Gandra, S. Cláudio do
Barco, 4806-909 Caldas das Taipas, Guimarães, Portugal
- ICVS/3B’s, PT Government Associated Laboratory,
Braga/Guimarães, Portugal
| | - F. Javier Arias
- G.I.R. Bioforge, University of Valladolid, Edificio I+D,
Paseo de Belén, 1, 47011, Valladolid, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Valladolid, Spain
| | - J. Carlos Rodríguez-Cabello
- G.I.R. Bioforge, University of Valladolid, Edificio I+D,
Paseo de Belén, 1, 47011, Valladolid, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Valladolid, Spain
| | - João F. Mano
- 3B’s
Research
Group − Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of
the European Institute of Excellence of Tissue Engineering and Regenerative
Medicine, AvePark, Zona Industrial da Gandra, S. Cláudio do
Barco, 4806-909 Caldas das Taipas, Guimarães, Portugal
- ICVS/3B’s, PT Government Associated Laboratory,
Braga/Guimarães, Portugal
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Pečová M, Šebela M, Marková Z, Poláková K, Čuda J, Šafářová K, Zbořil R. Thermostable trypsin conjugates immobilized to biogenic magnetite show a high operational stability and remarkable reusability for protein digestion. NANOTECHNOLOGY 2013; 24:125102. [PMID: 23466477 DOI: 10.1088/0957-4484/24/12/125102] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this work, magnetosomes produced by microorganisms were chosen as a suitable magnetic carrier for covalent immobilization of thermostable trypsin conjugates with an expected applicability for efficient and rapid digestion of proteins at elevated temperatures. First, a biogenic magnetite was isolated from Magnetospirillum gryphiswaldense and its free surface was coated with the natural polysaccharide chitosan containing free amino and hydroxy groups. Prior to covalent immobilization, bovine trypsin was modified by conjugating with α-, β- and γ-cyclodextrin. Modified trypsin was bound to the magnetic carriers via amino groups using 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide and N-hydroxysulfosuccinimide as coupling reagents. The magnetic biomaterial was characterized by magnetometric analysis and electron microscopy. With regard to their biochemical properties, the immobilized trypsin conjugates showed an increased resistance to elevated temperatures, eliminated autolysis, had an unchanged pH optimum and a significant storage stability and reusability. Considering these parameters, the presented enzymatic system exhibits properties that are superior to those of trypsin forms obtained by other frequently used approaches. The proteolytic performance was demonstrated during in-solution digestion of model proteins (horseradish peroxidase, bovine serum albumin and hen egg white lysozyme) followed by mass spectrometry. It is shown that both magnetic immobilization and chemical modification enhance the characteristics of trypsin making it a promising tool for protein digestion.
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Affiliation(s)
- M Pečová
- Department of Protein Biochemistry and Proteomics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University, Šlechtitelů 11, 783 71 Olomouc, Czech Republic
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Setayesh T, Mousavi SF, Siadat SD. Effect of Magnetospirillum gryphiswaldense on serum iron levels in mice. IRANIAN JOURNAL OF MICROBIOLOGY 2012; 4:160-3. [PMID: 23066493 PMCID: PMC3465544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND AND OBJECTIVES The Magnetotactic bacterium Magnetospirillumgryphiswaldense (MSR-1) mineralizes the magnetite (Fe(3) O(4)) crystals and organizes a highly ordered intracellular structure, called the magnetosome. Iron transport system supports the biogenesis of magnetite. Although iron is an essential trace element for many metabolic pathways of the body, increase or decrease in iron will cause many diseases. Mice were infected by MSR-1 to study survival of bacteria in mice when injected by different routes. The aim of this study was to investigate whether bacterial magnetite formation could take up Fe(2+) ions from the blood an animal model. MATERIAL AND METHODS In this study, MSR-1 at a dose lower than LD(50) in 200 µl volume of PBS buffer was injected as intravascular (i.v), peritoneal (i.p) and subcutaneous (s.c) in mice. Number of viable bacterial was determined in organs such as liver, spleen and lymph node by measuring colony-forming unit (CFU). Moreover, serum iron level was evaluated by using commercial kits. RESULTS AND CONCLUSION According to CFU measurements, after 96 hours, mice can clear MSR-1 from their body with different routes of injection. We have also shown that MSR-1 bacteria can affect the blood iron level in mice. The serum iron level decreased from control level in the first 24 h after i.v injection (P< 0.05). Our research on optimizing the biological magnetic system is still continuing.
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Affiliation(s)
- T Setayesh
- Microbiology Research Center & Department of Bacteriology, Pasteur Institute of Iran, Pasteur Ave., Tehran, Iran,Microbiology Group, Islamic Azad University of Tonekabon, Tonekabon Iran
| | - SF Mousavi
- Microbiology Research Center & Department of Bacteriology, Pasteur Institute of Iran, Pasteur Ave., Tehran, Iran, Corresponding author: Seyed Fazlollah Mousavi, PhD, Address: Microbiology Research center & Dept. of Bacteriology, Pasteur Institute of Iran, Pasteur Ave., Tehran, Iran. Tel/Fax: +982166405535. E-mail:
| | - SD Siadat
- Microbiology Research Center & Department of Bacteriology, Pasteur Institute of Iran, Pasteur Ave., Tehran, Iran
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54
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Magnetotactic bacteria: promising biosorbents for heavy metals. Appl Microbiol Biotechnol 2012; 95:1097-104. [DOI: 10.1007/s00253-012-4245-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 06/13/2012] [Accepted: 06/14/2012] [Indexed: 11/27/2022]
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Alphandéry E, Guyot F, Chebbi I. Preparation of chains of magnetosomes, isolated from Magnetospirillum magneticum strain AMB-1 magnetotactic bacteria, yielding efficient treatment of tumors using magnetic hyperthermia. Int J Pharm 2012; 434:444-52. [PMID: 22698862 DOI: 10.1016/j.ijpharm.2012.06.015] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 05/31/2012] [Accepted: 06/03/2012] [Indexed: 10/28/2022]
Abstract
Chains of magnetosomes isolated from Magnetospirillum magneticum strain AMB-1 magnetotactic bacteria by sonication at 30 W during 2 h are tested for magnetic hyperthermia treatment of tumors. These chains are composed of magnetosomes, which are bound to each other by a filament made of proteins. When they are incubated in the presence of cancer cells and exposed to an alternating magnetic field of frequency 198 kHz and average magnetic field strength of 20 or 30 mT, they produce efficient inhibition of cancer cell proliferation. This behavior is explained by a high cellular internalization, a good stability in solution and a homogenous distribution of the magnetosome chains, which enables efficient heating. When the chains are heated during 5 h at 90°C in the presence of 1% SDS, the filament binding the magnetosomes together is denatured and individual magnetosomes are obtained. By contrast to the chains of magnetosomes, the individual magnetosomes are prone to aggregation, are not stable in solution and do not produce efficient inhibition of cancer cell proliferation under application of an alternating magnetic field.
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Affiliation(s)
- Edouard Alphandéry
- Institut de minéralogie et de physique des milieux condensés, Université Pierre et Marie Curie, UMR CNRS 7590, 4 Place Jussieu, 75005 Paris, France.
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Mendoza-Reséndez R, Luna C, Barriga-Castro ED, Bonville P, Serna CJ. Control of crystallite orientation and size in Fe and FeCo nanoneedles. NANOTECHNOLOGY 2012; 23:225601. [PMID: 22572527 DOI: 10.1088/0957-4484/23/22/225601] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Uniform magnetic nanoneedles have been prepared by hydrogen reduction of elongated nanoarchitectures. These precursors are as-prepared or cobalt-coated aggregates of highly oriented haematite nanocrystals (∼5 nm). The final materials are flattened nanoneedles formed by chains of assembled Fe or FeCo single-domain nanocrystals. The microstructural properties of such nanoneedles were tailored using renewed and improved synthetic strategies. In this fashion, the needle elongation and composition, the crystallite size (from 15 up to 30 nm), the nanocrystal orientation (with the 〈110〉 or 〈001〉 directions roughly along the long axis of the nanoneedle) and their type of arrangement (single chains, frustrated double chains and double chains) were controlled by modifying the reduction time, the axial ratio of the precursor haematite and the presence of additional coatings of aluminum or yttrium compounds. The values of the coercivity H(C) found for these nanoneedles are compared with the values predicted by the chain of spheres model assuming a symmetric fanning mechanism for magnetization reversal.
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Affiliation(s)
- Raquel Mendoza-Reséndez
- Facultad de Ingeniería Mecánica y Eléctrica, Universidad Autónoma de Nuevo León, San Nicolás de los Garza, Nuevo León, 66450, Mexico. Centro de Innovación, Investigación y Desarrollo en Ingeniería y Tecnología, Universidad Autónoma de Nuevo León, Apodaca, Nuevo León, 6440, Mexico
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Liang C, Jing L, Shi X, Zhang Y, Xian Y. Magnetically controlled bioelectrocatalytic system based on ferrocene-tagged magnetic nanoparticles by thiol-ene reaction. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2012.02.089] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Tang YS, Wang D, Zhou C, Ma W, Zhang YQ, Liu B, Zhang S. Bacterial magnetic particles as a novel and efficient gene vaccine delivery system. Gene Ther 2011; 19:1187-95. [PMID: 22170341 PMCID: PMC3520014 DOI: 10.1038/gt.2011.197] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
DNA vaccination is an attractive approach for eliciting antigen-specific immunity. In this study, we used magnetosomes (bacterial magnetic particles, BMPs) as carriers of a recombinant DNA composed of a secondary lymphoid tissue chemokine, human papillomavirus type E7 (HPV-E7) and Ig-Fc fragment (pSLC-E7-Fc) to generate a gene vaccine (BMP-V) for tumour immunotherapy. The results indicate that BMPs linked to DNA more efficiently in phosphate-buffered saline (pH=4–5) than in physiological saline. Efficient transfection of BMP-V in vitro and in vivo was achieved when a 600-mT static magnetic field was applied for 10 min. In a mouse tumour model, subcutaneous injection of BMP-V (5 μg, × 3 at 4-day intervals) plus magnetic exposure elicited systemic HPV-E7-specific immunity leading to significant tumour inhibition. The treated mice tolerated BMP-V immunisation well with no toxic side effects, as shown by histopathological examinations of major internal organs. Taken together, these results suggest that BMP can be used as a gene carrier to elicit a systemic immune response.
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Affiliation(s)
- Y-S Tang
- Department of Immunology, Cancer Institute and Cancer Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
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Sun J, Li Y, Liang XJ, Wang PC. Bacterial Magnetosome: A Novel Biogenetic Magnetic Targeted Drug Carrier with Potential Multifunctions. JOURNAL OF NANOMATERIALS 2011; 2011:469031-469043. [PMID: 22448162 PMCID: PMC3310401 DOI: 10.1155/2011/469031] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Bacterial magnetosomes (BMs) synthesized by magnetotactic bacteria have recently drawn great interest due to their unique features. BMs are used experimentally as carriers for antibodies, enzymes, ligands, nucleic acids, and chemotherapeutic drugs. In addition to the common attractive properties of magnetic carriers, BMs also show superiority as targeting nanoscale drug carriers, which is hardly matched by artificial magnetic particles. We are presenting the potential applications of BMs as drug carriers by introducing the drug-loading methods and strategies and the recent research progress of BMs which has contributed to the application of BMs as drug carriers.
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Affiliation(s)
- Jianbo Sun
- Department of Microbiology and Immunology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
| | - Ying Li
- State Key Laboratories for Agro-biotechnology and College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Xing-Jie Liang
- Laboratory of Nanomedicine and Nanosafety, Division of Nanomedicine and Nanobiology, National Center for Nanoscience and Technology, Beijing 100190, China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Chinese Academy of Sciences, Beijing 100190, China
| | - Paul C. Wang
- Laboratory of Molecular Imaging, Department of Radiology, Howard University, Washington, DC 20060, USA
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Li X, Xu H, Chen ZS, Chen G. Biosynthesis of Nanoparticles by Microorganisms and Their Applications. JOURNAL OF NANOMATERIALS 2011. [PMID: 0 DOI: 10.1155/2011/270974] [Citation(s) in RCA: 254] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The development of eco-friendly technologies in material synthesis is of considerable importance to expand their biological applications. Nowadays, a variety of inorganic nanoparticles with well-defined chemical composition, size, and morphology have been synthesized by using different microorganisms, and their applications in many cutting-edge technological areas have been explored. This paper highlights the recent developments of the biosynthesis of inorganic nanoparticles including metallic nanoparticles, oxide nanoparticles, sulfide nanoparticles, and other typical nanoparticles. Different formation mechanisms of these nanoparticles will be discussed as well. The conditions to control the size/shape and stability of particles are summarized. The applications of these biosynthesized nanoparticles in a wide spectrum of potential areas are presented including targeted drug delivery, cancer treatment, gene therapy and DNA analysis, antibacterial agents, biosensors, enhancing reaction rates, separation science, and magnetic resonance imaging (MRI). The current limitations and future prospects for the synthesis of inorganic nanoparticles by microorganisms are discussed.
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Affiliation(s)
- Xiangqian Li
- School of Life Science and Chemical Engineering, Huaiyin Institute of Technology, Huai'an, Jiangsu 223003, China
- Department of Pharmaceutical Sciences, College of Pharmacy and Allied Health Professions, Queens, NY 11439, USA
| | - Huizhong Xu
- Department of Physics, St. John's College of Liberal Arts and Science, St. John's University, Queens, NY 11439, USA
| | - Zhe-Sheng Chen
- Department of Pharmaceutical Sciences, College of Pharmacy and Allied Health Professions, Queens, NY 11439, USA
| | - Guofang Chen
- Department of Chemistry, St. John's College of Liberal Arts and Science, St. John's University, Queens, NY 11439, USA
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Abstract
Cell based therapeutics are emerging as powerful regimens. To better understand the migration and proliferation mechanisms of implanted cells, a means to track cells in living subjects is essential, and to achieve that, a number of cell labeling techniques have been developed. Nanoparticles, with their superior physical properties, have become the materials of choice in many investigations along this line. Owing to inherent magnetic, optical or acoustic attributes, these nanoparticles can be detected by corresponding imaging modalities in living subjects at a high spatial and temporal resolution. These features allow implanted cells to be separated from host cells; and have advantages over traditional histological methods, as they permit non-invasive, real-time tracking in vivo. This review attempts to give a summary of progress in using nanotechnology to monitor cell trafficking. We will focus on direct cell labeling techniques, in which cells ingest nanoparticles that bear traceable signals, such as iron oxide or quantum dots. Ferritin and MagA reporter genes that can package endogenous iron or iron supplement into iron oxide nanoparticles will also be discussed.
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Affiliation(s)
- Ashwinkumar Bhirde
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institute of Health (NIH), Bethesda, MD 20892, USA
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Large-scale production of magnetosomes by chemostat culture of Magnetospirillum gryphiswaldense at high cell density. Microb Cell Fact 2010; 9:99. [PMID: 21144001 PMCID: PMC3019156 DOI: 10.1186/1475-2859-9-99] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2010] [Accepted: 12/12/2010] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND Magnetotactic bacteria have long intrigued researchers because they synthesize intracellular nano-scale (40-100 nm) magnetic particles composed of Fe3O4, termed magnetosomes. Current research focuses on the molecular mechanisms of bacterial magnetosome formation and its practical applications in biotechnology and medicine. Practical applications of magnetosomes are based on their ferrimagnetism, nanoscale size, narrow size distribution, dispersal ability, and membrane-bound structure. However, the applications of magnetosomes have not yet been developed commercially, mainly because magnetotactic bacteria are difficult to cultivate and consistent, high yields of magnetosomes have not yet been achieved. RESULTS We report a chemostat culture technique based on pH-stat feeding that yields a high cell density of Magnetospirillum gryphiswaldense strain MSR-1 in an auto-fermentor. In a large-scale fermentor, the magnetosome yield was significantly increased by adjusting the stirring rate and airflow which regulates the level of dissolved oxygen (DO). Low concentration of sodium lactate (2.3 mmol l-1) in the culture medium resulted in more rapid cell growth and higher magnetosome yield than high concentration of lactate (20 mmol l-1). The optical density of M. gryphiswaldense cells reached 12 OD565 nm after 36 hr culture in a 42 L fermentor. Magnetosome yield and productivity were 83.23 ± 5.36 mg l-1 (dry weight) and 55.49 mg l-1 day-1, respectively, which were 1.99 and 3.32 times higher than the corresponding values in our previous study. CONCLUSIONS Compared to previously reported methods, our culture technique with the MSR-1 strain significantly increased cell density, cell yield, and magnetosome yield in a shorter time window and thus reduced the cost of production. The cell density and magnetosome yield reported here are the highest so far achieved with a magnetotactic bacteria. Refinement of this technique will enable further increase of cell density and magnetosome yield.
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Narayanan R. Recent advances in noble metal nanocatalysts for Suzuki and Heck cross-coupling reactions. Molecules 2010; 15:2124-38. [PMID: 20428032 PMCID: PMC6257342 DOI: 10.3390/molecules15042124] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2010] [Revised: 03/02/2010] [Accepted: 03/23/2010] [Indexed: 11/20/2022] Open
Abstract
Since metal nanoparticles have a high surface-to-volume ratio and very active surface atoms, they are very attractive catalysts for a wide variety of organic and inorganic reactions, compared to bulk catalysts. Metal nanoparticles suspended in colloidal solutions and those adsorbed onto bulk supports have been used as catalysts for a wide variety of carbon-carbon bond formation reactions such as the Suzuki and Heck cross-coupling reactions. This review article highlights some of the latest advances in the application of noble metal nanoparticles as catalysts for these two industrially important classes of cross-coupling reactions. We will discuss several important advances in using metal nanocatalysts in Suzuki and Heck cross-coupling reactions such as investigations on the nanoparticle shape dependence on the catalytic activity, novel types of supported metal nanoparticles as nanocatalysts, and the use of bi-metallic, tri-metallic and multi-metallic nanoparticles as catalysts for the Suzuki and Heck cross-coupling reactions.
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Affiliation(s)
- Radha Narayanan
- Department of Chemistry, University of Rhode Island, Kingston, RI 02881, USA.
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Korbekandi H, Iravani S, Abbasi S. Production of nanoparticles using organisms. Crit Rev Biotechnol 2009; 29:279-306. [DOI: 10.3109/07388550903062462] [Citation(s) in RCA: 200] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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