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Yu Y, Dai W, Luan Y. Bio- and eco-corona related to plants: Understanding the formation and biological effects of plant protein coatings on nanoparticles. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 317:120784. [PMID: 36462678 DOI: 10.1016/j.envpol.2022.120784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 10/20/2022] [Accepted: 11/27/2022] [Indexed: 06/17/2023]
Abstract
The thriving nano-enabled agriculture facilitates the interaction of nanomaterials with plants. Recently, these interactions and their biological effects are receiving increasing attention. Upon entering plants via leaves, roots, stems, and other organs, nanoparticles adsorb numerous biomolecules inside plants and form bio-corona. In addition, nanoparticles that enter plants through roots may have formed eco-corona with root exudates in the rhizosphere environment before contacting with plant exogenous proteins. The most significant biological effects of plant protein corona include changes in protein structure and function, as well as changes in nanoparticle toxicity and targeting ability. However, the mechanisms, particularly how protein corona affects plant protein function, plant development and growth, and rhizosphere environment properties, require further investigation. Our review summarizes the current understanding of the formation and biological effects of nanoparticle-plant protein corona and provides an outlook on future research.
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Affiliation(s)
- Yanni Yu
- The Key Laboratory for Silviculture and Conservation of Ministry of Education, College of Forestry, Beijing Forestry University, Beijing, 100083, China
| | - Wei Dai
- The Key Laboratory for Silviculture and Conservation of Ministry of Education, College of Forestry, Beijing Forestry University, Beijing, 100083, China
| | - Yaning Luan
- The Key Laboratory for Silviculture and Conservation of Ministry of Education, College of Forestry, Beijing Forestry University, Beijing, 100083, China.
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Wang Y, Lu S, He W, Gong S, Zhang Y, Zhao X, Fu Y, Zhu Z. Modeling and characterization of the electrical conductivity on metal nanoparticles/carbon nanotube/polymer composites. Sci Rep 2022; 12:10448. [PMID: 35729335 PMCID: PMC9213557 DOI: 10.1038/s41598-022-14596-x] [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: 04/13/2022] [Accepted: 06/09/2022] [Indexed: 11/10/2022] Open
Abstract
Flexible conductive films have good deformability and conductivity, and are expected to be used in flexible electronic devices. In this paper, four kinds of flexible conductive films were successfully prepared by compounding nano-sized metal (Ni, Cu, Au or AuCu alloy) particles to CNT surface and then dispersing to polydimethylsiloxane matrix. Experiment results show that the conductivity of these prepared films are almost two orders of magnitude higher than that of CNT/polydimethylsiloxane films with the same CNT loadings. A simulation model based on percolation network theory and Monte Carlo technology is introduced to study the influence of nanoparticles on the composite conductivity. Results confirmed that the introduction of nanoparticles effectively reduces the effective resistance of CNT and the tunnelling resistance at CNT junctions. The intrinsic conductivity and the length diameter ratio of CNT, the intrinsic conductivity, the size and the coverage ratio of nanoparticles are the core parameters affecting the conductivity of composite. Compared with CNT/polydimethylsiloxane films, the optimized theoretical conductivity of these nano-sized particles enhanced composites can be further improved.
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Affiliation(s)
- Yang Wang
- School of Materials Science and Engineering, Central South University, Hunan, 410083, Changsha, China
| | - Sijian Lu
- School of Materials Science and Engineering, Central South University, Hunan, 410083, Changsha, China
| | - Wenke He
- School of Materials Science and Engineering, Central South University, Hunan, 410083, Changsha, China
| | - Shen Gong
- School of Materials Science and Engineering, Central South University, Hunan, 410083, Changsha, China. .,State Key Laboratory of Powder Metallurgy, Changsha, 410083, China.
| | - Yunqian Zhang
- School of Life Science, Central South University, Hunan, 410083, Changsha, China
| | - Xinsi Zhao
- School of Materials Science and Engineering, Central South University, Hunan, 410083, Changsha, China
| | - Yuanyuan Fu
- School of Materials Science and Engineering, Central South University, Hunan, 410083, Changsha, China
| | - Zhenghong Zhu
- Department of Mechanical Engineering, York University, 4700 Keele Street, Toronto, ON, M3J 1P3, Canada
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Raj T, Hashim FH, Huddin AB, Hussain A, Ibrahim MF, Abdul PM. Classification of oil palm fresh fruit maturity based on carotene content from Raman spectra. Sci Rep 2021; 11:18315. [PMID: 34526627 PMCID: PMC8443547 DOI: 10.1038/s41598-021-97857-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 08/27/2021] [Indexed: 11/30/2022] Open
Abstract
The oil yield, measured in oil extraction rate per hectare in the palm oil industry, is directly affected by the ripening levels of the oil palm fresh fruit bunches at the point of harvesting. A rapid, non-invasive and reliable method in assessing the maturity level of oil palm harvests will enable harvesting at an optimum time to increase oil yield. This study shows the potential of using Raman spectroscopy to assess the ripeness level of oil palm fruitlets. By characterizing the carotene components as useful ripeness features, an automated ripeness classification model has been created using machine learning. A total of 46 oil palm fruit spectra consisting of 3 ripeness categories; under ripe, ripe, and over ripe, were analyzed in this work. The extracted features were tested with 19 classification techniques to classify the oil palm fruits into the three ripeness categories. The Raman peak averaging at 1515 cm−1 is shown to be a significant molecular fingerprint for carotene levels, which can serve as a ripeness indicator in oil palm fruits. Further signal analysis on the Raman peak reveals 4 significant sub bands found to be lycopene (ν1a), β-carotene (ν1b), lutein (ν1c) and neoxanthin (ν1d) which originate from the C=C stretching vibration of carotenoid molecules found in the peel of the oil palm fruit. The fine KNN classifier is found to provide the highest overall accuracy of 100%. The classifier employs 6 features: peak intensities of bands ν1a to ν1d and peak positions of bands ν1c and ν1d as predictors. In conclusion, the Raman spectroscopy method has the potential to provide an accurate and effective way in determining the ripeness of oil palm fresh fruits.
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Affiliation(s)
- Thinal Raj
- Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi Selangor, Malaysia.
| | - Fazida Hanim Hashim
- Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi Selangor, Malaysia.
| | - Aqilah Baseri Huddin
- Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi Selangor, Malaysia
| | - Aini Hussain
- Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi Selangor, Malaysia
| | - Mohd Faisal Ibrahim
- Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi Selangor, Malaysia
| | - Peer Mohamed Abdul
- Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, Bangi Selangor, Malaysia
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