Zinc oxide nanoparticles: a review of their biological synthesis, antimicrobial activity, uptake, translocation and biotransformation in plants

Singh, Arun Kumar; Singh, Niharika; Afzal, Shadma; Singh, Tanu; Hussain, Imtiyaz

doi:10.1007/s10853-017-1544-1

Cited by 360 publications

(171 citation statements)

References 94 publications

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“…To avoid the use of non-eco-friendly, toxic, and unsafe reagents, the green synthesis of ZnO Ps has become an important alternative to conventional physio-chemical processes. In this eco-friendly approach, the reducing agents, capping agents, dispersants, and binders are replaced with plant extracts and different microorganisms [4,26,[29][30][31]44,45]. To improve the photocatalytic activity and overcome the photo-corrosion of ZnO, structure modification of ZnO Ps has been performed with the aim of minimizing the recombination loss of the photo-induced electron-hole pairs and extending the spectral response of ZnO to the visible spectrum [27].…”

Section: Characteristics Of Znomentioning

confidence: 99%

“…The synthesis parameters and conditions, such as synthesis type, precursors used, molar ratio of starting materials, reaction medium, pH value, temperature, type of reducing agent, synthesis time, and drying time, all directly affect the structure, shape, and size of ZnO Ps and consequently their functional properties [2][3][4]31,45,51]. ZnO generally crystallizes into three main structures, i.e., hexagonal wurtzite, cubic rocksalt, and cubic zinc blende structures, among which the wurtzite crystal structure is the most common since it is thermodynamically stable under ambient conditions [52].…”

Section: Characteristics Of Znomentioning

confidence: 99%

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Zinc Oxide for Functional Textile Coatings: Recent Advances

2019

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The use of ZnO for the functionalization of textile substrates is growing rapidly, since it can provide unique multifunctional properties, such as photocatalytic self-cleaning, antimicrobial activity, UV protection, flame retardancy, thermal insulation and moisture management, hydrophobicity, and electrical conductivity. This paper aims to review the recent progress in the fabrication of ZnO-functionalized textiles, with an emphasis on understanding the specificity and mechanisms of ZnO action that impart individual properties to the textile fibers. The most common synthesis and application processes of ZnO to textile substrates are summarized. The influence of ZnO concentration, particle size and shape on ZnO functionality is presented. The importance of doping and coupling procedures to enhance ZnO performance is highlighted. The need to use binding and seeding agents to increase the durability of ZnO coatings is expressed. In addition to functional properties, the cytotoxicity of ZnO coatings is also discussed. Future directions in the use of ZnO for textile functionalization are identified as well.

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Section: Characteristics Of Znomentioning

confidence: 99%

Section: Characteristics Of Znomentioning

confidence: 99%

Zinc Oxide for Functional Textile Coatings: Recent Advances

2019

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“…Up to now, various metal oxides such as zinc oxide (ZnO) nanoparticles have been synthesized using plants extract [17][18][19][20][21][22][23][24][25]. The ZnO nanoparticles have unique properties, including optical and electrical conductivity, UV-filtering, photochemical, photocatalytic, anti-viral, anti-bacterial, antifungal and anti-cancer activities [26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Enhanced anti-bacterial activities of ZnO nanoparticles and ZnO/CuO nanocomposites synthesized using Vaccinium arctostaphylos L. fruit extract

Mohammadi-Aloucheh

Habibi‐Yangjeh

Bayrami

et al. 2018

Artificial Cells, Nanomedicine, and Biotechnology

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A green synthesis route was developed for preparation of the ZnO nanoparticles and ZnO/CuO nanocomposites by using Vaccinium arctostaphylos L. fruit extract, and their anti-bacterial activities against two pathogenic bacteria, Escherichia coli (Gram negative) and Staphylococcus aureus (Gram positive), were investigated. The fabricated nanomaterials were characterized by XRD, EDX, FESEM, TEM, TGA, FT-IR, UV-vis DRS and BET instruments. The results showed that the sizes of ZnO and CuO nanoparticles in the ZnO/CuO (10%) nanocomposite were 12 and 8 nm, respectively. In addition, specific surface areas of the ZnO (W), ZnO (ext) and ZnO/CuO samples were 29.3, 27.5 and 18.0 m/g, respectively. The results obtained from EDX, TGA, FT-IR and UV-Vis DRS analyses displayed that some of the organic compounds from the fruit extract have bonded to the surface of the samples fabricated in the presence of the fruit extract. The results revealed that the anti-bacterial activity of the fabricated samples is as ZnO/CuO (10%) > ZnO/CuO (5%) > ZnO (ext) > ZnO (W). Viability percentages for E. coli and S. aureus bacteria were 12.1 ± 0.39 and 14.9 ± 0.65 in the presence of the ZnO/CuO (10%) nanocomposite, respectively. The SEM images clearly demonstrated the disruption of the bacterial membranes during the inactivation process.

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“…The overall results illustrated that near-infrared hyperspectral imaging coupled with machine learning could be used to trace geographical origins of dry narrow-leaved oleaster fruits.2 of 13 oleaster fruits, as a traditional medicine, are used to treat many diseases in nations and countries from Central Asia to West Asia. As a medicine and food, the fruit of narrow-leaved oleaster fruits is not only a raw material for food industry processing but also a raw material for functional food and new drugs [1][2][3][4][5][6][7][8][9][10][11]. It has good prospects for development and utilization in arid and semi-arid regions of Northwest China.…”

mentioning

confidence: 99%

Application of Near-Infrared Hyperspectral Imaging with Machine Learning Methods to Identify Geographical Origins of Dry Narrow-Leaved Oleaster (Elaeagnus angustifolia) Fruits

Gao

Yan

et al. 2019

Foods

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Narrow-leaved oleaster (Elaeagnus angustifolia) fruit is a kind of natural product used as food and traditional medicine. Narrow-leaved oleaster fruits from different geographical origins vary in chemical and physical properties and differ in their nutritional and commercial values. In this study, near-infrared hyperspectral imaging covering the spectral range of 874-1734 nm was used to identify the geographical origins of dry narrow-leaved oleaster fruits with machine learning methods. Average spectra of each single narrow-leaved oleaster fruit were extracted. Second derivative spectra were used to identify effective wavelengths. Partial least squares discriminant analysis (PLS-DA) and support vector machine (SVM) were used to build discriminant models for geographical origin identification using full spectra and effective wavelengths. In addition, deep convolutional neural network (CNN) models were built using full spectra and effective wavelengths. Good classification performances were obtained by these three models using full spectra and effective wavelengths, with classification accuracy of the calibration, validation, and prediction set all over 90%. Models using effective wavelengths obtained close results to models using full spectra. The performances of the PLS-DA, SVM, and CNN models were close. The overall results illustrated that near-infrared hyperspectral imaging coupled with machine learning could be used to trace geographical origins of dry narrow-leaved oleaster fruits.2 of 13 oleaster fruits, as a traditional medicine, are used to treat many diseases in nations and countries from Central Asia to West Asia. As a medicine and food, the fruit of narrow-leaved oleaster fruits is not only a raw material for food industry processing but also a raw material for functional food and new drugs [1][2][3][4][5][6][7][8][9][10][11]. It has good prospects for development and utilization in arid and semi-arid regions of Northwest China. Its unique habitat environment and long history of planting have produced unique qualities of narrow-leaved oleaster fruits in different producing areas. The qualities of narrow-leaved oleaster fruits are different depending on their place of origin, so it is urgent to establish effective methods for identification of the place of origin of narrow-leaved oleaster fruits.At present, different scholars have isolated the bioactive components of narrow-leaved oleaster fruits [12], studied the physical and chemical properties and antioxidant properties of narrow-leaved oleaster fruits [13], used Gas Chromatography-Mass Spectrometer (GC-MS) to analyze the components of narrow-leaved oleaster fruit oil [14], and studied the diseases of narrow-leaved oleaster fruits [15]. However, there have been few studies on differentiation of the origins of narrow-leaved oleaster fruits. It is feasible to differentiate narrow-leaved oleaster fruits from different producing areas by synthesizing external morphological and microscopic characteristics and physicochemical identification of fruit powder...

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Zinc oxide nanoparticles: a review of their biological synthesis, antimicrobial activity, uptake, translocation and biotransformation in plants

Cited by 360 publications

References 94 publications

Zinc Oxide for Functional Textile Coatings: Recent Advances

Zinc Oxide for Functional Textile Coatings: Recent Advances

Enhanced anti-bacterial activities of ZnO nanoparticles and ZnO/CuO nanocomposites synthesized using Vaccinium arctostaphylos L. fruit extract

Application of Near-Infrared Hyperspectral Imaging with Machine Learning Methods to Identify Geographical Origins of Dry Narrow-Leaved Oleaster (Elaeagnus angustifolia) Fruits

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