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Shukla S, Mehata MS. Selective picomolar detection of carcinogenic chromium ions using silver nanoparticles capped via biomolecules from flowers of Plumeria obtusa. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Dhanapal AR, Thandeeswaran M, Muthusamy P, Jayaraman A. Identification and structural prediction of the unrevealed amidohydrolase enzyme: Pterin deaminase from Agrobacterium tumefaciens LBA4404. Biotechnol Appl Biochem 2023; 70:193-200. [PMID: 35352406 DOI: 10.1002/bab.2342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 02/28/2022] [Indexed: 11/11/2022]
Abstract
Microbes make a remarkable contribution to the health and well-being of living beings all over the world. Interestingly, pterin deaminase is an amidohydrolase enzyme that exhibits antitumor, anticancer activities and antioxidant properties. With the existing evidence of the presence of pterin deaminase from microbial sources, an attempt was made to reveal the existence of this enzyme in the unexplored bacterium Agrobacterium tumefaciens LBA4404. After, the cells were harvested and characterized as intracellular enzymes and then partially purified through acetone precipitation. Subsequently, further purification step was carried out with an ion-exchange chromatogram (HiTrap Q FF) using the Fast-Protein Liquid Chromatography technique (FPLC). Henceforward, the approximate molecular weight of the purified pterin deaminase was determined through SDS-PAGE. Furthermore, the purified protein was identified accurately by MALDI-TOF, and the sequence was explored through a Mascot search engine. Additionally, the three-dimensional structure was predicted and then validated, as well as ligand-binding sites, and the stability of this enzyme was confirmed for the first time. Thus, the present study revealed the selected parameters showing a considerable impact on the identification and purification of pterin deaminase from A. tumefaciens LBA4404 for the first time. The enzyme specificity makes it a favorable choice as a potent anticancer agent.
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Affiliation(s)
- Anand Raj Dhanapal
- Department of Biotechnology, Karpagam Academy of Higher Education, Coimbatore, India
| | - Murugesan Thandeeswaran
- Cancer Therapeutics Laboratory, Department of Microbial Biotechnology, Bharathiar University, Coimbatore, India
| | | | - Angayarkanni Jayaraman
- Cancer Therapeutics Laboratory, Department of Microbial Biotechnology, Bharathiar University, Coimbatore, India
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Awadelkareem AM, Al-Shammari E, Elkhalifa AO, Adnan M, Siddiqui AJ, Patel M, Khan MI, Mehmood K, Ashfaq F, Badraoui R, Ashraf SA. Biosynthesized Silver Nanoparticles from Eruca sativa Miller Leaf Extract Exhibits Antibacterial, Antioxidant, Anti-Quorum-Sensing, Antibiofilm, and Anti-Metastatic Activities. Antibiotics (Basel) 2022; 11:antibiotics11070853. [PMID: 35884107 PMCID: PMC9311509 DOI: 10.3390/antibiotics11070853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 06/22/2022] [Accepted: 06/23/2022] [Indexed: 12/03/2022] Open
Abstract
Worldwide, the primary problem today is the proliferation of cancer and secondary bacterial infections caused by biofilms, as they are the principal causes of death due to the lack of effective drugs. A great deal of biological activities of silver nanoparticles (AgNPs) have made them a brilliant choice for the development of new drugs in recent years. The present study was conducted to evaluate the anticancer, antibacterial, anti-QS, and antibiofilm effects of AgNPs synthesized from Eruca sativa (E. sativa) leaf extract. The ultraviolet–visible (UV–Vis) spectra showed a peak of surface plasmon resonance at 424 nm λmax, which corresponded to AgNP formation. The Fourier transform infrared spectroscopy (FT-IR) confirmed that biological moieties are involved for the development of AgNPs. Moreover, transmission electron microscopy (TEM) analyses confirmed the spherical shape and uniform size (8.11 to 15 nm) of the AgNPs. In human lung cancer cells (A549), the anticancer potential of AgNPs was examined by the MTT [3-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] assay, scratch assay, and invasion assay. The results indicated that AgNPs inhibit the migration of A549 cells. The synthesized AgNPs showed MIC values of 12.5 µg/mL against Chromobacterium violaceum (C. violaceum) and 25 µg/mL against Pseudomonas aeruginosa (P. aeruginosa), which demonstrated their antibacterial abilities. Biological compounds that disable the QS system are being investigated as potential strategies for preventing bacterial infections. Thus, we analyzed the potential effectiveness of synthesized AgNPs in inhibiting QS-regulated virulence factors and biofilm formation in both strains of bacteria. In C. violaceum, the synthesized AgNPs significantly inhibited both violacein (85.18% at 1/2 × MIC) and acyl homoserine lactone (78.76% at 1/2 × MIC). QS inhibitory activity was also demonstrated in P. aeruginosa at a sub-MIC concentration (1/2 × MIC) by a reduction in pyocyanin activity (68.83%), total protease (68.50%), LasA activity (63.91%), and LasB activity (56.40%). Additionally, the exopolysaccharide production was significantly reduced in both C. violaceum (65.79% at 1/2 × MIC) and P. aeruginosa (57.65% at 1/2 × MIC). The formation of biofilm was also significantly inhibited at 1/2 × MIC in C. violaceum (76.49%) and in P. aeruginosa (65.31%). Moreover, a GC–MS analysis confirmed the presence of different classes of bioactive phytochemical constituents present in the leaf extract of E. sativa. On the basis of our results, we conclude that biologically synthesized AgNPs showed numerous multifunctional properties and have the potential to be used against human cancer and bacterial biofilm-related infections.
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Affiliation(s)
- Amir Mahgoub Awadelkareem
- Department of Clinical Nutrition, College of Applied Medical Sciences, University of Hail, Hail P.O. Box 2440, Saudi Arabia; (A.M.A.); (E.A.-S.); (A.O.E.)
| | - Eyad Al-Shammari
- Department of Clinical Nutrition, College of Applied Medical Sciences, University of Hail, Hail P.O. Box 2440, Saudi Arabia; (A.M.A.); (E.A.-S.); (A.O.E.)
| | - AbdElmoneim O. Elkhalifa
- Department of Clinical Nutrition, College of Applied Medical Sciences, University of Hail, Hail P.O. Box 2440, Saudi Arabia; (A.M.A.); (E.A.-S.); (A.O.E.)
| | - Mohd Adnan
- Department of Biology, College of Science, University of Hail, Hail P.O. Box 2440, Saudi Arabia; (M.A.); (A.J.S.); (R.B.)
| | - Arif Jamal Siddiqui
- Department of Biology, College of Science, University of Hail, Hail P.O. Box 2440, Saudi Arabia; (M.A.); (A.J.S.); (R.B.)
| | - Mitesh Patel
- Department of Biotechnology, Parul Institute of Applied Sciences and Centre of Research for Development, Parul University, Vadodara 391760, Gujarat, India;
| | - Mohammad Idreesh Khan
- Department of Clinical Nutrition, College of Applied Health Sciences in Arras, Qassim University, Buraydah 58883, Saudi Arabia;
| | - Khalid Mehmood
- Department of Pharmaceutics, College of Pharmacy, University of Hail, Hail P.O. Box 2440, Saudi Arabia;
| | - Fauzia Ashfaq
- Department of Clinical Nutrition, College of Applied Medical Sciences, Jazan University, Jazan 45142, Saudi Arabia;
| | - Riadh Badraoui
- Department of Biology, College of Science, University of Hail, Hail P.O. Box 2440, Saudi Arabia; (M.A.); (A.J.S.); (R.B.)
| | - Syed Amir Ashraf
- Department of Clinical Nutrition, College of Applied Medical Sciences, University of Hail, Hail P.O. Box 2440, Saudi Arabia; (A.M.A.); (E.A.-S.); (A.O.E.)
- Correspondence:
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Process design and economic assessment of large-scale production of molybdenum disulfide nanomaterials. CHEMICAL PRODUCT AND PROCESS MODELING 2022. [DOI: 10.1515/cppm-2022-0004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The design of large-scale nanomaterial production is nowadays a major research topic that requires efficient tools for appropriate decision-making and process simulation is considered among the rational approach to address such difficult issue. The present study deals with process design and economic assessment of Molybdenum Disulfide (MoS2) nanomaterials production at large-scale via solvothermal method basing on our previous bench scale results. The commercial simulator Aspen Plus was used for process modelling and assuming a plant capacity of 100 tonnes/year. The simulation results were used to perform the cost assessment and profitability analysis while taking into account two relevant cases with (Recycle Case) and without recycling of Ethylenediamine and Hydrazine (Base Case). Note that for the technological and economical assessment the effluent treatment system was not taken into account. The total capital investment was estimated to be ca.14.3 M$ for the base case and ca. 17.4 M$ for recycle case, while the total operating costs were about 2945 $ for the base case and 503 $ for the recycle case for the production of 1 kg of MoS2. Thus, in addition to intrinsic advantages associated with the easier preparation and lower environmental impact of solvothermal method, larger production with recycling option can make the process more economically profitable.
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Biswas A, Divya S, Sharmila P, Pardha-Saradhi P. Light promoted brown staining of protoplasm by Ag+ is ideal to test wheat pollen viability rapidly. PLoS One 2020; 15:e0243856. [PMID: 33326483 PMCID: PMC7743923 DOI: 10.1371/journal.pone.0243856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 11/28/2020] [Indexed: 11/18/2022] Open
Abstract
Pollen viability is crucial for wheat breeding programs. The unique potential of the protoplasm of live cells to turn brown due to the synthesis of silver nanoparticles (AgNPs) through rapid photoreduction of Ag+, was exploited for testing wheat pollen viability. Ag+-viability test medium (consisting of 0.5 mM AgNO3 and 300 mM KNO3) incubated with wheat pollen turned brown within 2 min under intense light (~600 μmol photon flux density m-2s-1), but not in dark. The brown medium displayed AgNPs-specific surface plasmon resonance band in its absorption spectrum. Light microscopic studies showed the presence of uniformly stained brown protoplasm in viable pollen incubated with Ag+-viability medium in the presence of light. Investigations with transmission electron microscope coupled with energy dispersive X-ray established the presence of distinct 5-35 nm NPs composed of Ag. Powder X-ray diffraction analysis revealed that AgNPs were crystalline and biphasic composed of Ag0 and Ag2O. Conversely, non-viable pollen and heat-killed pollen did not turn brown on incubation with Ag+-medium in light. We believe that the viable wheat pollen turn brown rapidly by bio-transforming Ag+ to AgNPs through photoreduction. Our findings furnish a novel simplest and rapid method for testing wheat pollen viability.
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Affiliation(s)
- Abhishek Biswas
- Department of Environmental Studies, University of Delhi, Delhi, India
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Exogenous Production of Silver Nanoparticles by Tephrosia apollinea Living Plants under Drought Stress and Their Antimicrobial Activities. NANOMATERIALS 2019; 9:nano9121716. [PMID: 31805737 PMCID: PMC6955765 DOI: 10.3390/nano9121716] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 11/11/2019] [Accepted: 11/26/2019] [Indexed: 01/04/2023]
Abstract
Nanoparticle (NP) synthesis by biological systems is more cost-effective, safe, and environmentally friendly when compared to currently used chemical and physical methods. Although many studies have utilized different plant extracts to synthesize NPs, few studies have incorporated living plants. In this study, silver nanoparticles (AgNPs) were synthesized exogenously by Tephrosia apollinea living plant system under the combined stresses of silver nitrate and different levels of drought stress simulated by Polyethylene glycol (PEG) (0, −0.1, −0.2, and −0.4 MPa for three and six days). Biomass, cell death, and H2O2 content were evaluated to determine the toxicological effect of the treatments on the plant. More severe effects were detected in day 6 plants compared to day 3 plants, and at higher drought levels. UV-visible spectrum, energy dispersive X-ray spectroscopy, X-ray diffraction, scanning electron microscope, and Fourier transform infrared spectroscopy were used to detect and characterize the T. apollinea synthesized NPs. The shapes of the NPs were spherical and cubic with different phytochemicals being the possible capping agents. Broth microdilution was used to determine the antimicrobial activity of the NPs against Escherichiacoli and Staphylococcus aureus. In this case, antimicrobial activity increased at higher PEG concentrations. Bactericidal effects were observed against E. coli, while only bacteriostatic effects were detected against S. aureus.
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Masum MMI, Siddiqa MM, Ali KA, Zhang Y, Abdallah Y, Ibrahim E, Qiu W, Yan C, Li B. Biogenic Synthesis of Silver Nanoparticles Using Phyllanthus emblica Fruit Extract and Its Inhibitory Action Against the Pathogen Acidovorax oryzae Strain RS-2 of Rice Bacterial Brown Stripe. Front Microbiol 2019; 10:820. [PMID: 31110495 PMCID: PMC6501729 DOI: 10.3389/fmicb.2019.00820] [Citation(s) in RCA: 119] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2019] [Accepted: 04/01/2019] [Indexed: 12/05/2022] Open
Abstract
Biogenic synthesis of silver nanoparticles (AgNPs) using plants has become a promising substitute to the conventional chemical synthesis method. In this study, we report low-cost, green synthesis of AgNPs using fresh fruit extract of Phyllanthus emblica. The biosynthesized AgNPs was confirmed and characterized by analysis of spectroscopy profile of the UV-visible and Energy dispersive spectrophotometer, Fourier transform infrared, X-ray diffraction pattern, and electron microscopy images examination. UV-visible spectra showed a surface resonance peak of 430 nm corresponding to the formation of AgNPs, and FTIR spectra confirmed the involvement of biological molecules in AgNPs synthesis. In spherical AgNPs, the particle size ranged from 19.8 to 92.8 nm and the average diameter was 39 nm. Synthesized nanoparticles at 20 μg/ml showed remarkable antimicrobial activity in vitro against the pathogen Acidovorax oryzae strain RS-2 of rice bacterial brown stripe, while 62.41% reduction in OD600 value was observed compared to the control. Moreover, the inhibitory efficiency of AgNPs increased with the increase of incubation time. Furthermore, AgNPs not only disturbed biofilm formation and swarming ability but also increased the secretion of effector Hcp in strain RS-2, resulting from damage to the cell membrane, which was substantiated by TEM images and live/dead cell staining result. Overall, this study suggested that AgNPs can be an attractive and eco-friendly candidate to control rice bacterial disease.
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Affiliation(s)
- Md. Mahidul Islam Masum
- State Key Laboratory of Rice Biology and Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
- Department of Plant Pathology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh
| | | | - Khattak Arif Ali
- State Key Laboratory of Rice Biology and Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Yang Zhang
- State Key Laboratory of Rice Biology and Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Yasmine Abdallah
- State Key Laboratory of Rice Biology and Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Ezzeldin Ibrahim
- State Key Laboratory of Rice Biology and Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Wen Qiu
- State Key Laboratory of Rice Biology and Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
| | - Chenqi Yan
- Institute of Biotechnology, Ningbo Academy of Agricultural Sciences, Ningbo, China
| | - Bin Li
- State Key Laboratory of Rice Biology and Key Lab of Molecular Biology of Crop Pathogens and Insects, Institute of Biotechnology, Zhejiang University, Hangzhou, China
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Khan BF, Hamidullah, Dwivedi S, Konwar R, Zubair S, Owais M. Potential of bacterial culture media in biofabrication of metal nanoparticles and the therapeutic potential of the as‐synthesized nanoparticles in conjunction with artemisinin against MDA‐MB‐231 breast cancer cells. J Cell Physiol 2018; 234:6951-6964. [DOI: 10.1002/jcp.27438] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 08/28/2018] [Indexed: 01/08/2023]
Affiliation(s)
- Badrealam Farheen Khan
- Molecular Immunology Laboratory Interdisciplinary Biotechnology Unit, Aligarh Muslim University Aligarh India
| | - Hamidullah
- Division of Endocrinology, CSIR‐Central Drug Research Institute Lucknow India
| | - Sonam Dwivedi
- Division of Endocrinology, CSIR‐Central Drug Research Institute Lucknow India
| | - Rituraj Konwar
- Division of Endocrinology, CSIR‐Central Drug Research Institute Lucknow India
| | | | - Mohammad Owais
- Molecular Immunology Laboratory Interdisciplinary Biotechnology Unit, Aligarh Muslim University Aligarh India
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Tighe-Neira R, Carmora E, Recio G, Nunes-Nesi A, Reyes-Diaz M, Alberdi M, Rengel Z, Inostroza-Blancheteau C. Metallic nanoparticles influence the structure and function of the photosynthetic apparatus in plants. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 130:408-417. [PMID: 30064097 DOI: 10.1016/j.plaphy.2018.07.024] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 07/17/2018] [Accepted: 07/18/2018] [Indexed: 06/08/2023]
Abstract
The applications of nanoparticles continue to expand into areas as diverse as medicine, bioremediation, cosmetics, pharmacology and various industries, including agri-food production. The widespread use of nanoparticles has generated concerns given the impact these nanoparticles - mostly metal-based such as CuO, Ag, Au, CeO2, TiO2, ZnO, Co, and Pt - could be having on plants. Some of the most studied variables are plant growth, development, production of biomass, and ultimately oxidative stress and photosynthesis. A systematic appraisal of information about the impact of nanoparticles on these processes is needed to enhance our understanding of the effects of metallic nanoparticles and oxides on the structure and function on the plant photosynthetic apparatus. Most nanoparticles studied, especially CuO and Ag, had a detrimental impact on the structure and function of the photosynthetic apparatus. Nanoparticles led to a decrease in concentration of photosynthetic pigments, especially chlorophyll, and disruption of grana and other malformations in chloroplasts. Regarding the functions of the photosynthetic apparatus, nanoparticles were associated with a decrease in the photosynthetic efficiency of photosystem II and decreased net photosynthesis. However, CeO2 and TiO2 nanoparticles may have a positive effect on photosynthetic efficiency, mainly due to an increase in electron flow between the photosystems II and I in the Hill reaction, as well as an increase in Rubisco activity in the Calvin and Benson cycle. Nevertheless, the underlying mechanisms are poorly understood. The future mechanistic work needs to be aimed at characterizing the enhancing effect of nanoparticles on the active generation of ATP and NADPH, carbon fixation and its incorporation into primary molecules such as photo-assimilates.
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Affiliation(s)
- Ricardo Tighe-Neira
- Programa de Doctorado en Ciencias Agropecuarias, Facultad de Recursos Naturales, Universidad Católica de Temuco, P.O. Box 15-D, Temuco, Chile; Departamento de Ciencias Agropecuarias y Acuícolas, Facultad de Recursos Naturales, Universidad Católica de Temuco, P.O. Box 15-D, Temuco, Chile
| | - Erico Carmora
- Núcleo de Investigación en Bioproductos y Materiales Avanzados, Facultad de Ingeniería, Universidad Católica de Temuco, P.O. Box 15-D, Temuco, Chile
| | - Gonzalo Recio
- Núcleo de Investigación en Bioproductos y Materiales Avanzados, Facultad de Ingeniería, Universidad Católica de Temuco, P.O. Box 15-D, Temuco, Chile
| | - Adriano Nunes-Nesi
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Minas Gerais, 36570-900, Viçosa, Brazil
| | - Marjorie Reyes-Diaz
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile; Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN), Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile
| | - Miren Alberdi
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile; Center of Plant, Soil Interaction and Natural Resources Biotechnology, Scientific and Technological Bioresource Nucleus (BIOREN), Universidad de La Frontera, P.O. Box 54-D, Temuco, Chile
| | - Zed Rengel
- Soil Science and Plant Nutrition, UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6009, Australia
| | - Claudio Inostroza-Blancheteau
- Departamento de Ciencias Agropecuarias y Acuícolas, Facultad de Recursos Naturales, Universidad Católica de Temuco, P.O. Box 15-D, Temuco, Chile; Núcleo de Investigación en Producción Alimentaria, Facultad de Recursos Naturales, Universidad Católica de Temuco, P.O. Box 15-D, Temuco, Chile.
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Pardha-Saradhi P, Shabnam N, Sharmila P, Ganguli AK, Kim H. Differential sensitivity of light-harnessing photosynthetic events in wheat and sunflower to exogenously applied ionic and nanoparticulate silver. CHEMOSPHERE 2018; 194:340-351. [PMID: 29220750 DOI: 10.1016/j.chemosphere.2017.11.122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Revised: 11/19/2017] [Accepted: 11/22/2017] [Indexed: 06/07/2023]
Abstract
Potential impacts of inevitable leaks of silver nanoparticles (AgNPs) into environment on human beings need attention. Owing to the vitality of photosynthesis in maintaining life and ecosystem functioning, impacts of exogenously applied nanoparticulate and Ag+ on photosystem (PS)II function, which governs overall photosynthesis, in wheat and sunflower were evaluated. PSII efficiency and related Chl a fluorescence kinetics of these two plants remained unaffected by AgNPs. However, Ag+ caused a significant decline in the PSII activity and related fluorescence steps in wheat, but not in sunflower. Electron flow between QA and PQ pool was found most sensitive to Ag+. Number of active reaction centers, electron transport, trapping of absorbed light for photochemistry, and performance index declined, while dissipation of absorbed light energy as heat significantly increased in wheat exposed to Ag+. Total antioxidant activity in sunflower was least affected by both Ag and AgNPs. In contrast, in the case of wheat, the antioxidant activity was declined by Ag+ but not by AgNPs. Further, the amount of silver absorbed by plants exposed to Ag+ was higher than that absorbed by plants exposed to AgNPs. While wheat retained majority of Ag in its roots, sunflower showed major Ag accumulation in stem. Photosynthetic events in sunflower, unlike wheat, were least affected as no detectable Ag levels was recorded in their leaves. Our findings revealed that AgNPs seemed non/less-toxic to light harnessing photosynthetic machinery of wheat, compared to Ag+. Photosynthetic events in sunflower were not affected by Ag+, either, as its translocation to leaves was restricted.
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Affiliation(s)
- P Pardha-Saradhi
- Department of Environmental Studies, University of Delhi, Delhi, 110007, India.
| | - Nisha Shabnam
- Department of Environmental Engineering, University of Seoul, Seoul, 02504, South Korea
| | - P Sharmila
- Department of Chemistry, Indian Institute of Technology, New Delhi, 110016, India
| | - Ashok K Ganguli
- Department of Chemistry, Indian Institute of Technology, New Delhi, 110016, India; Institute of Nanoscience and Technology, Habitat Centre, Phase-X, Sector-64, Mohali, 160062, Punjab, India
| | - Hyunook Kim
- Department of Environmental Engineering, University of Seoul, Seoul, 02504, South Korea.
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Shabnam N, Sharmila P, Pardha-Saradhi P. Impact of ionic and nanoparticle speciation states of silver on light harnessing photosynthetic events in Spirodela polyrhiza. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2017; 19:80-86. [PMID: 27483000 DOI: 10.1080/15226514.2016.1216083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Owing to wide range of applications, nanotechnology is growing expeditiously. Likely negative impact of nanoparticles (NPs), which are inevitably released into our surroundings, on living organisms is of growing concern. Findings presented here are outcome of investigations carried out to evaluate the impact of ionic and NP speciation states of silver on light harnessing photosynthetic events in Spirodela polyrhiza fronds. Fronds exposed to ionic speciation state showed significant decline in PS (photosystem) II efficiency (Fv/Fm; variable fluorescence/maximal fluorescence), while those exposed to silver nanoparticles (Ag-NPs) showed marginal decline. Accordingly, decline in amplitude of Chl a fluorescence transients was sharper in fronds treated with Ag+ than those treated with Ag-NPs. Of the various phases Chl a fluorescence transient, J-I phase [which reflects reduction of plastoquinone (PQ) pool] was most sensitive to both Ag+ and Ag-NPs. Phenomenological yield models, built using Biolyzer software, revealed that fronds exposed to Ag+ possessed significantly lower potential to trap and harness absorbed light energy for photochemical reactions than those exposed to Ag-NPs. Accordingly, dissipation of absorbed light energy as heat was significantly higher in fronds exposed to Ag+ than those exposed to Ag-NPs. These findings revealed that NP speciation state of silver is significantly less toxic to light harnessing photosynthetic machinery of S. polyrhiza, compared to ionic speciation state.
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Affiliation(s)
- Nisha Shabnam
- a Department of Environmental Studies , University of Delhi , Delhi , India
| | - P Sharmila
- b Department of Chemistry , Indian Institute of Technology , New Delhi , India
| | - P Pardha-Saradhi
- a Department of Environmental Studies , University of Delhi , Delhi , India
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Shabnam N, Sharmila P, Kim H, Pardha-Saradhi P. Light Mediated Generation of Silver Nanoparticles by Spinach Thylakoids/Chloroplasts. PLoS One 2016; 11:e0167937. [PMID: 27936248 PMCID: PMC5148069 DOI: 10.1371/journal.pone.0167937] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 11/22/2016] [Indexed: 11/18/2022] Open
Abstract
The unique potential of chloroplasts/thylakoids to harness light energy to transport electrons from H2O to various entities was exploited for reduction of Ag+ to generate nanoparticles (NPs). Spinach thylakoids/chloroplasts turned AgNO3 solutions brown in light, but not in dark. Besides showing Ag-NPs specific surface plasmon resonance band, these brown solutions showed presence of 5-30 nm crystalline NPs composed of Ag. Powder X-ray diffraction (PXRD) analysis revealed that Ag-NPs were biphasic composed of face-centered cubic Ag0 and cubic Ag2O. X-ray photoelectron spectroscopy (XPS) data further corroborated the presence of Ag2O in Ag-NPs. Limited formation of Ag-NPs in dark and increased generation of Ag0/Ag2O-NPs with increase in light intensity (photon flux density) by thylakoids/chloroplasts, established the role of light-harvesting photosynthetic machinery in generation of Ag0/Ag2O-NPs. Potential of thylakoids/chloroplasts to generate Ag-NPs from Ag+ on exposure to red and blue wavelength regions of visible light of electromagnetic spectrum, further confirmed the involvement of photosynthetic electron transport in reduction of Ag+ and generation of Ag-NPs. While light energy mediated photosynthetic electron transport donates energized electrons extracted from H2O to Ag+ to form Ag0-NPs, O2 released as a by-product during photolysis of H2O oxidizes Ag0 to form Ag2O-NPs. Our findings furnish a novel, simple, economic and green method that can be exploited for commercial production of Ag0/Ag2O-NPs.
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Affiliation(s)
- Nisha Shabnam
- Department of Environmental Studies, University of Delhi, Delhi, India
| | - P. Sharmila
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi, India
| | - Hyunook Kim
- Department of Energy and Environmental System Engineering, University of Seoul, Seoul, Korea
| | - P. Pardha-Saradhi
- Department of Environmental Studies, University of Delhi, Delhi, India
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Mahmoud WM, Abdelmoneim TS, Elazzazy AM. The Impact of Silver Nanoparticles Produced by Bacillus pumilus As Antimicrobial and Nematicide. Front Microbiol 2016; 7:1746. [PMID: 27891113 PMCID: PMC5102886 DOI: 10.3389/fmicb.2016.01746] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Accepted: 10/19/2016] [Indexed: 01/13/2023] Open
Abstract
This study evaluates the potential application of silver nanoparticles (AgNPs) as antimicrobial or nematicidal agents produced by the extremophile Bacillus pumilus, which was isolated from the alkaline Wadi El-Natrun Lake in Egypt. The AgNPs were characterized by ultraviolet-visible absorption spectroscopy, transmission electron microscopy, and energy dispersive x-ray spectroscopy. The size of AgNPs formed ranged from 20.12 to 29.48 nm. Panagrellus redivivus was exposed to different concentrations (0, 50, 100, 150, and 200 μg/mL) of AgNPs in a 5 mL nematode suspension (1 × 103 mL-1). The best result occurred at AgNP concentrations of 150 and 200 μg/mL, with death rates of 80 and 91%, respectively, following 48 h of exposure. AgNPs also exhibited potent antimicrobial properties when using Gram-negative and Gram-positive human pathogens, with MIC and MBC values of 5 and 10 μg/mL, respectively. These laboratory assays prove that biologically synthesized AgNPs are an ecofriendly material that can be used in lieu of solvents or toxic chemicals.
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Affiliation(s)
- Wael M. Mahmoud
- Medical Genetics Department, Faculty of Medicine, University of JeddahJeddah, Saudi Arabia
| | - Tamer S. Abdelmoneim
- Biology Department, Faculty of Science, University of JeddahJeddah, Saudi Arabia
- Department of Agricultural Botany, Faculty of Agriculture, Suez Canal UniversityIsmailia, Egypt
| | - Ahmed M. Elazzazy
- Biology Department, Faculty of Science, University of JeddahJeddah, Saudi Arabia
- Chemistry of Natural and Microbial Products Department, National Research CentreGiza, Egypt
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Application of nanoparticles derived from marine Staphylococcus lentus in sensing dichlorvos and mercury ions. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.04.055] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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15
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Javani S, Marín I, Amils R, Abad JP. Four psychrophilic bacteria from Antarctica extracellularly biosynthesize at low temperature highly stable silver nanoparticles with outstanding antimicrobial activity. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.07.028] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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16
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Elbeshehy EKF, Elazzazy AM, Aggelis G. Silver nanoparticles synthesis mediated by new isolates of Bacillus spp., nanoparticle characterization and their activity against Bean Yellow Mosaic Virus and human pathogens. Front Microbiol 2015; 6:453. [PMID: 26029190 PMCID: PMC4429621 DOI: 10.3389/fmicb.2015.00453] [Citation(s) in RCA: 146] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2015] [Accepted: 04/27/2015] [Indexed: 11/23/2022] Open
Abstract
Extracellular agents produced by newly isolated bacterial strains were able to catalyze the synthesis of silver nanoparticles (AgNPs). The most effective isolates were identified as Bacillus pumilus, B. persicus, and Bacillus licheniformis using molecular identification. DLS analysis revealed that the AgNPs synthesized by the above strains were in the size range of 77–92 nm. TEM observations showed that the nanoparticles were coated with a capping agent, which was probably involved in nanoparticle stabilization allowing their perfect dispersion in aqueous solutions. FTIR analyses indicated the presence of proteins in the capping agent of the nanoparticles and suggested that the oxidation of hydroxyl groups of peptide hydrolysates (originated from the growth medium) is coupled to the reduction of silver ions. Energy Dispersive X-ray Spectroscopy confirmed the above results. The nanoparticles, especially those synthesized by B. licheniformis, were stable (zeta potential ranged from −16.6 to −21.3 mV) and showed an excellent in vitro antimicrobial activity against important human pathogens and a considerable antiviral activity against the Bean Yellow Mosaic Virus. The significance of the particular antiviral activity is highlighted, given the significant yield reduction in fava bean crops resulting from Bean Yellow Mosaic Virus infections, in many African countries.
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Affiliation(s)
- Essam K F Elbeshehy
- Department of Biological Sciences, Faculty of Science (North Jeddah), King Abdulaziz University Jeddah, Saudi Arabia ; Department of Agricultural Botany, Faculty of Agriculture, Suez Canal University Ismalia, Egypt
| | - Ahmed M Elazzazy
- Department of Biological Sciences, Faculty of Science (North Jeddah), King Abdulaziz University Jeddah, Saudi Arabia ; Division of Pharmaceutical and Drug Industries, Department of Chemistry of Natural and Microbial Products, National Research Centre Giza, Egypt
| | - George Aggelis
- Department of Biological Sciences, Faculty of Science (North Jeddah), King Abdulaziz University Jeddah, Saudi Arabia ; Unit of Microbiology, Division of Genetics, Cell and Development Biology, Department of Biology, University of Patras Patras, Greece
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17
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Gavade NL, Kadam AN, Suwarnkar MB, Ghodake VP, Garadkar KM. Biogenic synthesis of multi-applicative silver nanoparticles by using Ziziphus Jujuba leaf extract. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 136 Pt B:953-60. [PMID: 25459621 DOI: 10.1016/j.saa.2014.09.118] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 07/27/2014] [Accepted: 09/28/2014] [Indexed: 05/22/2023]
Abstract
Herein, we are reporting for the first time one step biogenic synthesis of silver nanoparticles (AgNPs) at room temperature by using Ziziphus Jujuba leaf extract as a reducing and stabilizing agent. The process of nanoparticles preparation is green, rapid, environmentally benign and cost effective. The synthesized AgNPs were characterized by means of UV-Vis., XRD, FT-IR, TEM, DLS and Zeta potential. The absorption band centered at λmax 434 nm in UV-Vis. reflects surface plasmon resonance (SPR) of AgNPs. XRD analysis revealed, that biosynthesized AgNPs are crystalline in nature with the face centered cubic structure. FT-IR analysis indicates that nanoparticles were capped with the leaf extract. TEM images shows the synthesized nanoparticles are having different shapes with 20-30 nm size. The data obtained from DLS that support the hydrodynamic size of 28 nm. Zeta potential of -26.4 mV indicates that the nanoparticles were highly stable in colloidal state. The effect of pH, quantity of leaf extract and concentrations of AgNO3 were also studied to attend control over the particle size and stability. The synthesized AgNPs shows highly efficient catalytic activity towards the reduction of anthropogenic pollutant 4-nitrophenol (4-NP) and Methylene Blue (MB) for environmental protection. Synthesized AgNPs also exhibited good antimicrobial activity against Escherichia coli.
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Affiliation(s)
- N L Gavade
- Nanomaterials Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416004, M.S., India
| | - A N Kadam
- Nanomaterials Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416004, M.S., India
| | - M B Suwarnkar
- Nanomaterials Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416004, M.S., India
| | - V P Ghodake
- Department of Biotechnology Engineering, KIT's College of Engineering, Kolhapur 416004, M.S., India
| | - K M Garadkar
- Nanomaterials Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416004, M.S., India.
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Pardha-Saradhi P, Yamal G, Peddisetty T, Sharmila P, Nagar S, Singh J, Nagarajan R, Rao KS. Reducing strength prevailing at root surface of plants promotes reduction of Ag+ and generation of Ag(0)/Ag2O nanoparticles exogenously in aqueous phase. PLoS One 2014; 9:e106715. [PMID: 25184239 PMCID: PMC4153663 DOI: 10.1371/journal.pone.0106715] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Accepted: 08/09/2014] [Indexed: 12/27/2022] Open
Abstract
Potential of root system of plants from wide range of families to effectively reduce membrane impermeable ferricyanide to ferrocyanide and blue coloured 2,6-dichlorophenol indophenol (DCPIP) to colourless DCPIPH2 both under non-sterile and sterile conditions, revealed prevalence of immense reducing strength at root surface. As generation of silver nanoparticles (NPs) from Ag+ involves reduction, present investigations were carried to evaluate if reducing strength prevailing at surface of root system can be exploited for reduction of Ag+ and exogenous generation of silver-NPs. Root system of intact plants of 16 species from 11 diverse families of angiosperms turned clear colorless AgNO3 solutions, turbid brown. Absorption spectra of these turbid brown solutions showed silver-NPs specific surface plasmon resonance peak. Transmission electron microscope coupled with energy dispersive X-ray confirmed the presence of distinct NPs in the range of 5–50 nm containing Ag. Selected area electron diffraction and powder X-ray diffraction patterns of the silver NPs showed Bragg reflections, characteristic of crystalline face-centered cubic structure of Ag0 and cubic structure of Ag2O. Root system of intact plants raised under sterile conditions also generated Ag0/Ag2O-NPs under strict sterile conditions in a manner similar to that recorded under non-sterile conditions. This revealed the inbuilt potential of root system to generate Ag0/Ag2O-NPs independent of any microorganism. Roots of intact plants reduced triphenyltetrazolium to triphenylformazon and impermeable ferricyanide to ferrocyanide, suggesting involvement of plasma membrane bound dehydrogenases in reduction of Ag+ and formation of Ag0/Ag2O-NPs. Root enzyme extract reduced triphenyltetrazolium to triphenylformazon and Ag+ to Ag0 in presence of NADH, clearly establishing potential of dehydrogenases to reduce Ag+ to Ag0, which generate Ag0/Ag2O-NPs. Findings presented in this manuscript put forth a novel, simple, economically viable and green protocol for synthesis of silver-NPs under ambient conditions in aqueous phase, using root system of intact plants.
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Affiliation(s)
| | - Gupta Yamal
- Department of Environmental Studies, University of Delhi, Delhi, India
- Department of Botany, University of Delhi, Delhi, India
| | - Tanuj Peddisetty
- Department of Petroleum Engineering & Earth Sciences, University of Petroleum and Energy Studies, Dehradun, Uttarakhand, India
| | - Peddisetty Sharmila
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India
| | - Shilpi Nagar
- Department of Environmental Studies, University of Delhi, Delhi, India
| | - Jyoti Singh
- Department of Chemistry, University of Delhi, Delhi, India
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One-Step In Situ Biosynthesis of Graphene Oxide-Bacterial Cellulose Nanocomposite Hydrogels. Macromol Rapid Commun 2014; 35:1706-11. [DOI: 10.1002/marc.201400239] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Revised: 06/12/2014] [Indexed: 11/07/2022]
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20
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Plants fabricate Fe-nanocomplexes at root surface to counter and phytostabilize excess ionic Fe. Biometals 2013; 27:97-114. [DOI: 10.1007/s10534-013-9690-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Accepted: 11/25/2013] [Indexed: 11/26/2022]
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Shabnam N, Pardha-Saradhi P. Photosynthetic electron transport system promotes synthesis of Au-nanoparticles. PLoS One 2013; 8:e71123. [PMID: 23976990 PMCID: PMC3748038 DOI: 10.1371/journal.pone.0071123] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2013] [Accepted: 07/02/2013] [Indexed: 11/18/2022] Open
Abstract
In this communication, a novel, green, efficient and economically viable light mediated protocol for generation of Au-nanoparticles using most vital organelle, chloroplasts, of the plant system is portrayed. Thylakoids/chloroplasts isolated from Potamogeton nodosus (an aquatic plant) and Spinacia oleracea (a terrestrial plant) turned Au³⁺ solutions purple in presence of light of 600 µmol m⁻² s⁻¹ photon flux density (PFD) and the purple coloration intensified with time. UV-Vis spectra of these purple colored solutions showed absorption peak at ∼545 nm which is known to arise due to surface plasmon oscillations specific to Au-nanoparticles. However, thylakoids/chloroplasts did not alter color of Au³⁺ solutions in dark. These results clearly demonstrated that photosynthetic electron transport can reduce Au³⁺ to Au⁰ which nucleate to form Au-nanoparticles in presence of light. Transmission electron microscopic studies revealed that Au-nanoparticles generated by light driven photosynthetic electron transport system of thylakoids/chloroplasts were in range of 5-20 nm. Selected area electron diffraction and powder X-ray diffraction indicated crystalline nature of these nanoparticles. Energy dispersive X-ray confirmed that these nanoparticles were composed of Au. To confirm the potential of light driven photosynthetic electron transport in generation of Au-nanoparticles, thylakoids/chloroplasts were tested for their efficacy to generate Au-nanoparticles in presence of light of PFD ranging from 60 to 600 µmol m⁻² s⁻¹. The capacity of thylakoids/chloroplasts to generate Au-nanoparticles increased remarkably with increase in PFD, which further clearly demonstrated potential of light driven photosynthetic electron transport in reduction of Au³⁺ to Au⁰ to form nanoparticles. The light driven donation of electrons to metal ions by thylakoids/chloroplasts can be exploited for large scale production of nanoparticles.
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Affiliation(s)
- Nisha Shabnam
- Department of Environmental Studies, University of Delhi, Delhi, India
| | - P. Pardha-Saradhi
- Department of Environmental Studies, University of Delhi, Delhi, India
- * E-mail:
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