Щоб переглянути інші типи публікацій з цієї теми, перейдіть за посиланням: ZINC OXIDE NANOPARTICLE.
Статті в журналах з теми "ZINC OXIDE NANOPARTICLE"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 статей у журналах для дослідження на тему "ZINC OXIDE NANOPARTICLE".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте статті в журналах для різних дисциплін та оформлюйте правильно вашу бібліографію.
1
Rajan Abhinaya, Shymala, and Ramakrishnan Padmini. "BIOFABRICATION OF ZINC OXIDE NANOPARTICLES USING PTEROCARPUS MARSUPIUM AND ITS BIOMEDICAL APPLICATIONS." Asian Journal of Pharmaceutical and Clinical Research 12, no. 1 (January 7, 2019): 245. http://dx.doi.org/10.22159/ajpcr.2018.v12i1.28682.
Повний текст джерелаАнотація:
Objective: The objective of the study is to perform the synthesis of zinc oxide nanoparticles using the bark extract of Pterocarpus marsupium and to evaluate its biomedical applications.Methods: Various concentrations of zinc acetate are used, and synthesis conditions were optimized to get a stable nanoparticle. The finest synthesis condition for zinc oxide nanoparticle production was at pH 7 with 20 ml extract, zinc acetate 10 mM, and 120 min of reaction time. The synthesized nanopowder was characterized using various analytical techniques, such as ultraviolet (UV)-visible spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The synthesized nanoparticles were tested for their antimicrobial, anti-inflammatory, inhibition of lipid peroxidation, and inhibition of amylase activity.Results: The size range of nanoparticles obtained was in the range of 10–32 nm as reported by SEM. The UV-visible absorption spectrum of the synthesized nanoparticle showed a peak at 340 nm, which confirmed the presence of nanoparticles. FTIR spectroscopy analysis indicated the presence of zinc oxide stretching at 666.22 cm-1. Further, the IR spectra indicated the presence of alcohols and acids, which can act as capping agents around the nanoparticles. XRD analysis confirmed the crystalline nature of nanoparticles.The synthesized nanoparticle showed appreciable antimicrobial activity. Zinc oxide nanoparticles at 40 μg/well were tested against phytopathogens, Pseudomonas aeruginosa, Staphylococcus aureus, Aspergillus flavus, and Aspergillus niger showed 16, 13, 15, and 16 mm zones of inhibition, respectively. The synthesized nanoparticle showed a considerable increase in inhibition of lipid peroxidation and amylase activity. The nanoparticle also exhibited appreciable anti-inflammatory activity measured by the inhibition of albumin denaturation.Conclusion: The study instigates the simple and convenient method of synthesizing zinc oxide nanoparticles using P. marsupium and its few biomedical applications.
2
Rajan Abhinaya, Shymala, and Ramakrishnan Padmini. "BIOFABRICATION OF ZINC OXIDE NANOPARTICLES USING PTEROCARPUS MARSUPIUM AND ITS BIOMEDICAL APPLICATIONS." Asian Journal of Pharmaceutical and Clinical Research 12, no. 1 (January 7, 2019): 245. http://dx.doi.org/10.22159/ajpcr.2019.v12i1.28682.
Повний текст джерелаАнотація:
Objective: The objective of the study is to perform the synthesis of zinc oxide nanoparticles using the bark extract of Pterocarpus marsupium and to evaluate its biomedical applications.Methods: Various concentrations of zinc acetate are used, and synthesis conditions were optimized to get a stable nanoparticle. The finest synthesis condition for zinc oxide nanoparticle production was at pH 7 with 20 ml extract, zinc acetate 10 mM, and 120 min of reaction time. The synthesized nanopowder was characterized using various analytical techniques, such as ultraviolet (UV)-visible spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The synthesized nanoparticles were tested for their antimicrobial, anti-inflammatory, inhibition of lipid peroxidation, and inhibition of amylase activity.Results: The size range of nanoparticles obtained was in the range of 10–32 nm as reported by SEM. The UV-visible absorption spectrum of the synthesized nanoparticle showed a peak at 340 nm, which confirmed the presence of nanoparticles. FTIR spectroscopy analysis indicated the presence of zinc oxide stretching at 666.22 cm-1. Further, the IR spectra indicated the presence of alcohols and acids, which can act as capping agents around the nanoparticles. XRD analysis confirmed the crystalline nature of nanoparticles.The synthesized nanoparticle showed appreciable antimicrobial activity. Zinc oxide nanoparticles at 40 μg/well were tested against phytopathogens, Pseudomonas aeruginosa, Staphylococcus aureus, Aspergillus flavus, and Aspergillus niger showed 16, 13, 15, and 16 mm zones of inhibition, respectively. The synthesized nanoparticle showed a considerable increase in inhibition of lipid peroxidation and amylase activity. The nanoparticle also exhibited appreciable anti-inflammatory activity measured by the inhibition of albumin denaturation.Conclusion: The study instigates the simple and convenient method of synthesizing zinc oxide nanoparticles using P. marsupium and its few biomedical applications.
3
Wang, Dongyue, Yuhang Meng, Aidong Tang, and Huaming Yang. "Dehydroxylation of Kaolinite Tunes Metal Oxide–Nanoclay Interactions for Enhancing Antibacterial Activity." Minerals 12, no. 9 (August 29, 2022): 1097. http://dx.doi.org/10.3390/min12091097.
Повний текст джерелаАнотація:
Engineered nanoparticle–support interaction is an effective strategy for tuning the structures and performance of engineered nanoparticles. Here, we show that tuning the dehydroxylation of kaolinite nanoclay as the support could induce zinc oxide–kaolinite interactions. We used free energy theory, electron microscopy, and X-ray photoemission spectroscopy to identify interaction strengths between metal oxides and the underlying nanoclay induced by dehydroxylation. Desirable exposure of nanoparticle sites and the geometrical and crystal structure were obtained by tuning the interface interactions between ZnO nanoparticles and nanoclay. The surface free energy of zinc oxide–nanoclay results in different interfacial interactions, and the properties of the surface free energy electron-donating (γ−) and electron-accepting (γ+) parameters have significant effects on the electron acceptor. This could, in turn, promote stronger interactions between zinc oxide and the kaolinite surface, which produce more active (0001) Zn-polar surfaces with promoting zinc oxide nanoparticles growing along the <0001> direction. Reactive oxygen species, leached zinc ions, and electron transfer can modulate the antibacterial activities of the samples as a function of interface free energy. This further demonstrates the interfacial interactions induced by dehydroxylation. This work has new application potential in biomedicine and materials science.
4
Mikhailov, M. M., S. A. Yuryev, A. N. Lapin, and V. A. Goronchko. "The effect of high-temperature nanoparticle-based modification on the structure of zinc oxide powders." Journal of Physics: Conference Series 2291, no. 1 (July 1, 2022): 012019. http://dx.doi.org/10.1088/1742-6596/2291/1/012019.
Повний текст джерелаАнотація:
Abstract The authors have studied the effect of solid-state nanoparticle-based modification on the structure of zinc oxide powders. To carry out the experiment, seven types of nanoparticles of various oxides were applied. The modification was performed by heating the powder mixtures in the air at 650°C for 2 hours. The concentration of nanopowders was 10 wt.%, the average grain size of nanoparticles varied from 10 to 80 nm. It was established that high-temperature nanoparticle-based modification does not lead to significant structural changes and cannot affect the properties of zinc oxide powder. While modifying zinc oxide powders, an increase in photo- and radiation stability can occur primarily because of mechanisms associated with the deposition of nanoparticles on the surface of the micropowder. Due to structural changes, certain types of nanoparticles (e.g., alumina in the sample under investigation) can make a rather insignificant contribution to the stability of optical properties when exposed to radiation.
5
Basharat, Muhammad Haseeb, Muhammad Tariq, Riaz Mustafa, Amar Akash, Hafiza Hira Talib, Muhammad Nouman Aziz, Anadil Noel, et al. "Biologically Synthesized Zinc Oxide Nanoparticles and Carbon Tetrachloride as an Anti Cancer Drug: A Review." Pakistan Journal of Medical and Health Sciences 16, no. 6 (June 30, 2022): 1046–49. http://dx.doi.org/10.53350/pjmhs221661046.
Повний текст джерелаАнотація:
Cancer is a life-threatening disease, curing it is one of the primary tasks for scientists around the world. One of the major fields that have exceptional abilities to control cancer is nanotechnology and nano medicines. Zinc oxide nanoparticles have flexible platforms for therapeutic and biomedical practice. There is a vital need to manufacture a new anti-cancerous drug. Zinc oxide nanoparticles have a great potential to act as an anti-cancerous drug. A common effect of zinc nanoparticle and carbon tetrachloride is the primary concern on the liver, biologically synthesized nanoparticles can be used for this cure purpose. This review study aims to explain the effects of synthesized nanoparticles on the rat in the presence of CCl4; Combination of toxic substance with the presence of nanoparticle can give us a better idea on the effectiveness of nanoparticle. Keywords: Zinc oxide nanoparticles, Liver cirrhosis, Carbon tetrachloride, Liver function
6
David, S. Begila. "ANTIBACTERIAL ACTIVITY OF ZINC OXIDE NANOPARTICLE BY SONOCHEMICAL METHOD AND GREEN METHOD USING ZINGIBER OFFICINALE." Green Chemistry & Technology Letters 2, no. 1 (March 10, 2016): 11–15. http://dx.doi.org/10.18510/gctl.2016.212.
Повний текст джерелаАнотація:
Nanoparticles have made a steady progress in all the branches of science. It is used in biological applications including nanomedicine. Zinc oxide is also known as Zincite generally seen in a crystalline form. Zinc oxide nanoparticles are multifunctional. It has effective antibacterial activity. This study focuses on the synthesis of zinc oxide nanoparticle by the sonochemical and green method, characterized by XRD, SEM and to determine the antibacterial efficacy of green and chemical techniques.Results prove that green synthesized Zinc oxide nanoparticle shows the enhanced biocidal activity. In addition the current study has demonstrated that the particle size variation and surface area to volume ratio of green synthesized Zinc oxide nanoparticles are responsible for significant high antibacterial activity. From the result obtained it suggested that the biogenic green fabrication is a better choice due to eco-friendliness.
7
Baiee, Noor Al-Huda, and Ayad F. Alkaim. "Photocatalytic Degradation of Methylene Blue Dye from Aqueous Solutions in the Presence of Synthesized ZnO Nanoparticles." NeuroQuantology 19, no. 8 (September 4, 2021): 53–58. http://dx.doi.org/10.14704/nq.2021.19.8.nq21112.
Повний текст джерелаАнотація:
The photo catalytic degradation of an aqueous solution of methylene blue dye has studied under different conditions of preparation Zinc oxide nanoparticles and study effect of various mass of zinc oxide on the removal of methylene blue dye and initial concentration of MB dye. Several techniques were used to determine the surface properties of the prepared nano-zinc oxide such as XRD, TEM. Results showed that, the phot catalytic degradation process was high at the beginning and then decreased with time. and the phot catalytic degradation efficiency, increased by increasing weight of zinc oxide nanoparticle from 0.05 g to 0.3 g. and decrease with increase weight of zinc oxide nanoparticle from 0.5 g to 0.7g. also showed that the best weight to removal MB dye 0.3 gm.
8
Chang, Sheng-Po, and Kuan-Jen Chen. "Zinc Oxide Nanoparticle Photodetector." Journal of Nanomaterials 2012 (2012): 1–5. http://dx.doi.org/10.1155/2012/602398.
Повний текст джерелаАнотація:
A zinc oxide (ZnO) nanoparticle photodetector was fabricated using a simple method. Under a 5 V applied bias, its dark current and photocurrent were1.98×10-8and9.42×10-7 A, respectively. In other words, a photocurrent-to-dark-current contrast ratio of 48 was obtained. Under incident light at a wavelength of 375 nm and a 5 V applied bias, the detector’s measured responsivity was 3.75 A/W. The transient time constants measured during the turn-ON and turn-OFF states wereτON=204 sandτOFF=486 s, respectively.
9
Jamnongkan, Tongsai, Sathish K. Sukumaran, Masataka Sugimoto, Tomijiro Hara, Yumiko Takatsuka, and Kiyohito Koyama. "Towards novel wound dressings: antibacterial properties of zinc oxide nanoparticles and electrospun fiber mats of zinc oxide nanoparticle/poly(vinyl alcohol) hybrids." Journal of Polymer Engineering 35, no. 6 (August 1, 2015): 575–86. http://dx.doi.org/10.1515/polyeng-2014-0319.
Повний текст джерелаАнотація:
Abstract Zinc oxide (ZnO) nanoparticles possess antibacterial properties. Being less toxic to humans than silver, they are attractive as antibacterial agents in biomedical applications. In this study, we focus on the influence of the size of ZnO nanoparticles on their antibacterial action against strains of three bacteria: one Gram-negative, Escherichia coli and two Gram-positive, Bacillus subtilis and Staphylococcus aureus. The antibacterial efficacy of the nanoparticles increases with decreasing particle size. A major contributor to antibacterial action is the oxidative stress induced by the ZnO. To understand the relationship between antibacterial action and induced oxidative stress, we measured the dependence of the nanoparticle diameter on H2O2 concentration. Even at a fixed nanoparticle concentration, the H2O2 concentration increased with decreasing nanoparticle diameter. This is qualitatively similar to the dependence of the antibacterial activity on the nanoparticle diameter. In addition, in the presence of ZnO nanoparticles, we detected increased quantities of endogenous H2O2 in the E. coli. For use as antibacterial wound dressings, we fabricated nonwoven fiber mats from poly(vinyl alcohol) (PVA)/ZnO nanoparticle suspensions. The antibacterial efficacy of the PVA/ZnO electrospun fiber mats also increased with a decrease in the diameter and an increase in the concentration of the ZnO nanoparticles.
10
Raja, Mohan, A. M. Shanmugaraj, and Sung Hun Ryu. "Preparation of Template Free Zinc Oxide Nanoparticles Using Sol–Gel Chemistry." Journal of Nanoscience and Nanotechnology 8, no. 8 (August 1, 2008): 4224–26. http://dx.doi.org/10.1166/jnn.2008.an24.
Повний текст джерелаАнотація:
Zinc oxide (ZnO) nanoparticle has been synthesized via sol–gel chemistry using zinc acetate as a precursor with sodium hydroxide solution through microemulsion technique. X-ray diffraction (XRD) and transmission electron microscopy (TEM) studies reveal that the resultant zinc oxide nanoparticles are wurtzite type with the controlled morphology of nano triangular and half ellipsoid structures. Room temperature photoluminescence measurement of zinc oxide nanoparticles exhibits a strong green band at around 375 nm with excitation energy of 3.30 eV indicating oxygen vacancies on the surface of the nanoparticles.
11
G, Geetha, and Lincy M. "Comparative Study of Dye Degradation by Using Green Synthesized ZnO Nanoparticle and Bacillus." International Journal for Research in Applied Science and Engineering Technology 10, no. 5 (May 31, 2022): 3788–95. http://dx.doi.org/10.22214/ijraset.2022.42535.
Повний текст джерелаАнотація:
Abstract: Comparative study of methylene blue degradation by using green synthesized zinc oxide nanoparticle and microorganism. Zinc oxide nanoparticle are synthesized by using Camellia sinensis plant extract. Comparative study shows that zinc oxide nanoparticle is more effective in degradation of methylene blue dye than microorganism. ZnO nanoparticle are capable to degrade methylene blue in brief time due to its extract capped zinc oxide nanoparticle. Using Bacillus species degradation of dye increase with increasing time. Keywords: ZnO, Bacillus species, Camellia sinensis, Nanoparticle
12
Ahmad, Anwar, and Sajjala Sreedhar Reddy. "Performance evaluation of upflow anaerobic sludge blanket reactor using immobilized ZnO nanoparticle enhanced continuous biogas production." Energy & Environment 31, no. 2 (August 3, 2019): 330–47. http://dx.doi.org/10.1177/0958305x19865967.
Повний текст джерелаАнотація:
In this study, zinc oxide nanoparticles immobilized by methylenebisacrylamide were used for anaerobic consortium application and were examined for biomass retention capacity characterized in terms of volatile solids and specific methanogenic activity. The upflow anaerobic sludge blanket reactor was operated at various hydraulic retention times and was fed with palm oil mill effluent as a carbon source. The highest methane production rate of 510 mL CH4·L−1·h−1 with a methane yield of 68.3 L CH4 g−1·CODadded was obtained at palm oil mill effluent concentration of 20 g COD·L-1 and 24 h of hydraulic retention time. The average biogas (4.5 L) showed methane content and chemical oxygen demand reduction of 84.5 and 95.7%, respectively. Rmax was 570 mL L−1·POME·h−1 at 15% of zinc oxide nanoparticles, with butyrate and acetic acid in an effluent contained when operated at a hydraulic retention time of 24 h and a palm oil mill effluent concentration of 20 g COD L−1. A CO2 reduction of 93.6% was obtained at 15% w/v loading of zinc oxide nanoparticle. Experiments demonstrated that with the granule bead size of immobilized zinc oxide nanoparticle of 3.99 mm, production of CH4 and sequester of CO2 were 650 m3·d−1 and 456 m3·d−1, respectively. At 15% zinc oxide nanoparticle, granule leakage was found to be 0.065 mg·L−1. It is significant that this is the first report on immobilized zinc oxide nanoparticle granule biomass for biogas production from wastewater.
13
Sorna Gowri, V., Raj Kumar Sen, Sunil Kumar Sanghi, and Avanish Kumar Srivastava. "New Epoxy Poly(dimethyl acrylamide) Polymer for the Dispersion of ZnO Nanoparticles." Advanced Science, Engineering and Medicine 12, no. 10 (October 1, 2020): 1231–35. http://dx.doi.org/10.1166/asem.2020.2683.
Повний текст джерелаАнотація:
A series of novel Zinc Oxide (ZnO) copolymer composites films with different Zinc Oxide concentration were prepared through incorporation of pre-made Zinc Oxide particle in to copolymer epoxy poly(dimethyl acrylamide). The copolymer epoxy poly(dimethyl acrylamide) was synthesized by free radical polymerization to disperse the Zinc Oxide nanoparticles. The Zinc Oxide nanoparticles with the diameter of 19 nm–35 nm were synthesized from zinc nitrate via a wet chemical method. The aim of the work is to develop a new method/process/material for the dispersion of Zinc Oxide nanoparticles and testing the performance of these composites films. Thermo gravimetric analysis show that Zinc Oxide nanoparticles were successfully incorporated into the polymer matrix and the Zinc Oxide copolymer composites have a good thermal stability. The micro structural analysis also show newly synthesized polymer disperse the nanoparticles well as evidenced by Scanning Electron Microscopy (SEM) analysis. The uniformly dispersed Zinc Oxide nanoparticle in the polymer matrix and the particles almost remained in their original shape and size even after incorporation in the polymer matrix. Fourier transform infrared spectroscopy (FT-IR) shift of the copolymer adsorbed Zinc Oxide nanoparticles confirmed that polymer molecules chain was anchored on the surface of the nanoparticles.
14
Manoj M., Sowmiya, and Arul Selvi S. "Green Synthesized Zinc Oxide Nanoparticles from Elettaria cardamomum and its Characterization Image Processing and Antiproliferative Activity." International Journal of Zoological Investigations 08, no. 01 (2022): 129–37. http://dx.doi.org/10.33745/ijzi.2022.v08i01.017.
Повний текст джерелаАнотація:
Breast cancer is the second commonest cancer with increasing incidence in the world. One of the most important metal oxide nanoparticles, Zinc oxide nanoparticles are employed in various fields due to their specific physical and chemical properties. The present study investigated the anticancer activities of zinc oxide nanoparticles synthesized by using Elettaria cardamomum (seed pod). Elettaria cardamomum commonly known as Cardamom is a perennial herb belonging to the ginger family, Zingiberaceae. The synthesized nanoparticle was characterized using UV-VIS, XRD and SEM analysis. The green synthesized zinc oxide nanoparticles were tested for its anticancer potential against MCF7 cell lines.
15
Rajendran, Sorna Prema, and Kandasamy Sengodan. "Synthesis and Characterization of Zinc Oxide and Iron Oxide Nanoparticles Using Sesbania grandiflora Leaf Extract as Reducing Agent." Journal of Nanoscience 2017 (January 3, 2017): 1–7. http://dx.doi.org/10.1155/2017/8348507.
Повний текст джерелаАнотація:
The objectives of this present study are to synthesize iron oxide and zinc oxide nanoparticles from different concentrations of Sesbania grandiflora leaf extract (5–20%) using zinc nitrate and ferrous chloride as precursor materials and synthesized nanoparticles were characterized using UV-visible spectrometer, FTIR, X-ray diffraction, and SEM. The results showed that synthesized zinc oxide and iron oxide nanoparticles exhibited UV-visible absorption peaks at 235 nm and 220 nm, respectively, which indicated that both nanoparticles were photosensitive and the XRD study confirmed that both nanoparticles were crystalline in nature. In addition, FTIR was also used to analyze the various functional groups present in the synthesized nanoparticles. The SEM results reveal that zinc oxide nanoparticles were spherical in shape and having the particle size range of 15 to 35 nm whereas the iron oxide nanoparticles were nonspherical in shape with the size range of 25 to 60 nm. Application of synthesized nanoparticle on seafood effluent treatment was studied.
16
Akash, S., N. Ahalya, and P. Dhamodhar. "Green Synthesis, Characterization and Antimicrobial Activity of Zinc Oxide Nanoparticles on Clinical Isolates of Streptococcus pyogenes." Asian Journal of Chemistry 32, no. 4 (February 25, 2020): 907–11. http://dx.doi.org/10.14233/ajchem.2020.22495.
Повний текст джерелаАнотація:
Zinc oxide nanoparticles were synthesized using epicarp of Punica granatum by combustion method at moderate temperatures. Zinc oxide nanoparticles obtained in agglomerate form were characterized by powder X-ray diffractometer (PXRD) and found to have hexagonal phase, wurtzite structure. The crystalline size of nanoparticle was found to be ~ 60 nm by using Debye-Scherrer formula. The morphology Index, Lorentz factor and Lorentz polarization factor were also calculated. Ultraviolet-visible spectroscopy (UV-vis) spectrum for ZnO nanoparticle showed a strong absorbance at 374 nm. This corresponds to the calculated band gap energy of 3.48 eV and the particle size calculated using band gap was found to be 50 nm. The Fourier Transform Infrared Spectroscopy (FTIR) spectrum showed a peak at 499 cm-1, which indicated Zn-O stretch bond. The scanning electron microscopy (SEM) analysis proved the size of nanoparticles synthesized were around 50 nm and energy dispersive X-ray spectroscopy (EDS) revealed the elemental composition of zinc oxide nanoparticles. The ZnO-NPs were evaluated for antibacterial activity against gram positive, tonsillitis causing Streptococcus pyogenes. From the present study, it was concluded that zinc oxide nanoparticles synthesized by combustion method could be valuable and economic in the field of nanotechnology.
17
Tulasi, S. Lakshmi. "Impact of zinc oxide nanoparticles on Cajanus Cajan Linn. with special reference to germination, vegetative and biochemical aspects." Journal of medical pharmaceutical and allied sciences 12, no. 1 (January 31, 2023): 5624–29. http://dx.doi.org/10.55522/jmpas.v12i1.4573.
Повний текст джерелаАнотація:
The synthesis of Nanoparticle using plant extracts considered as clean and environmentally accepted “green chemistry” concept. The utilization of zinc nanoparticle in the field of agriculture as growth promoting agent were not adequately studied. The present study was intended to synthesise the zinc nanoparticle using aqueous extracts of Schrebera swietenioides Roxb., and the synthesized nanoparticle was evaluated for its applications in the field of agriculture and removal of pollutants in water.The zinc oxide nanoparticles were synthesised using aqueous leaf extract of S. swietenioides and 0.1 M zinc acetate. The formation nanoparticle were identified by observing the colour change of the reaction mixture. The formed nanoparticle was collected by centrifugation followed by washing several times with distilled water and then drying of the particles in air oven. The nanoparticle was characterized using various characterization techniques such as UV spectra ,SEM, and FT-IR. The applicability of the synthesised nanoparticles in the agriculture field was evaluated in terms of its effect on the seed germination and growth enhancement of seedlings. The zinc nanoparticle was studied for the seed germination and plant growth promotion of Pigeon pea (Cajanus cajan Linn.) The influence of nanopriming on the root length, shoot length, chlorophyll content and metal uptake was evaluated.
18
Lu, Kathy, and Jingzhong Zhao. "Equiaxed zinc oxide nanoparticle synthesis." Chemical Engineering Journal 160, no. 2 (June 2010): 788–93. http://dx.doi.org/10.1016/j.cej.2010.03.073.
Повний текст джерела
19
Ignacio, Rosa Mistica C., Cheol-Su Kim, and Soo-Ki Kim. "Immunotoxicity of metal oxide nanoparticle: zinc oxide." Molecular & Cellular Toxicology 10, no. 3 (September 2014): 237–44. http://dx.doi.org/10.1007/s13273-014-0026-7.
Повний текст джерела
20
Pourmohammad, Pirouz, Reza Alipanah-Moghadam, Ali Nemati, Vadoud Malekzadeh, and Yavar Mahmoodzadeh. "Comparison of the effects of zinc oxide and zinc oxide nanoparticles on the expression of hepcidin gene in rat liver." Hormone Molecular Biology and Clinical Investigation 42, no. 1 (November 13, 2020): 43–48. http://dx.doi.org/10.1515/hmbci-2020-0038.
Повний текст джерелаАнотація:
Abstract Objectives Nanoparticles have special properties, such as increased intestinal absorption, permeability, and so on. Zinc oxide (ZnO) nanoparticles have medical applications such as using in drug production. Studies of ZnO nanoparticles have shown the role of these particles in reducing or increasing the genes expression. Given the important role of hepcidin in the development of anemia and iron overload diseases, this study investigated the effect of ZnO nanoparticles on the hepatic expression of the hepcidin gene to help find a way to treat these diseases. Methods In this experimental study, 24 male Westar rats were divided into three groups: control, ZnO treating group and ZnO nanoparticle treating group. Both ZnO and ZnO nanoparticles were injected with 50 mg/kg body weight for 14 days. At the end, serums were collected and iron, ferritin and IL-6 levels were measured. Expression of the hepcidin gene was done by Real Time PCR. Results ZnO and the ZnO nanoparticle significantly increased the expression of the hepcidin gene relative to the control group. The increase in expression of the hepcidin gene in ZnO nanoparticles was more significant than in the ZnO. Conclusion ZnO nanoparticles led to significant increase in expression of the hepcidin gene.
21
Merah, Abdelali, Abdenabi Abidi, Hana Merad, Noureddine Gherraf, Mostepha Iezid, and Abdelghani Djahoudi. "Comparative Study of the Bacteriological Activity of Zinc Oxide and Copper Oxide Nanoparticles." Acta Scientifica Naturalis 6, no. 1 (March 1, 2019): 63–72. http://dx.doi.org/10.2478/asn-2019-0009.
Повний текст джерелаАнотація:
Abstract Interest in nanomaterials, especially metal oxides, in the fight against resistant and constantly changing bacterial strains, is more and more expressed. Their very high reactivity, resulting from their large surface area, promoted them to the rank of potential successors of antibiotics. Our work consisted of the synthesis of zinc oxide (ZnO) and copper oxide (CuO) in the nanoparticle state and the study of their bactericidal effect on various Gram-negative and Gram-positive bacterial strains. The nanoparticles of metal oxides have been synthesized by sol-gel method. Qualitative analysis and characterization by UV / Visible and infrared spectrophotometry and X-ray diffraction confirmed that the synthetic products are crystalline. The application of the Scherrer equation allows to determine the size of the two metal oxides, namely: 76.94 nm for ZnO and 24.86 nm for CuO. The bactericidal effect of ZnO and CuO nanoparticles was tested on Gram-positive bacteria (Staphylococcus aureus, Staphylococcus hominis, Staphylococcus haemolyticus, Enterococcus facials) and Gram-negative bacteria (Escherichia coli, Schigella, Klepsiella pneumoniae and Pseudomonas aeruginosa). The results indicate that the tested metal oxides nanoparticles have an effect that varies depending on bacterial species. Indeed, Gram-positive bacteria show greater sensitivity to ZnO nanoparticles whereas Gram-negative bacteria are more sensitive to CuO nanoparticles.
22
Danjuma Sani, Mahadi, V. D. N. Kumar Abbaraju, and N. V. S. Venugopal. "PHOTOCATALYTIC DEGRADATION OF LAMBDACYHALOTHRIN (PYRETHROID) IN WASTEWATER USING ZINC OXIDE NANOPARTICLE." RASAYAN Journal of Chemistry 16, no. 03 (2023): 1396–402. http://dx.doi.org/10.31788/rjc.2023.1638318.
Повний текст джерелаАнотація:
Accumulating synthetic pesticides in the living system has brought about several critical alerts from researchers as it interferes with the essential processes in the body. Metal oxide nanoparticles possess suitable properties including band gap and have played an important role in the photocatalytic degradation of toxic chemicals in wastewater and the environment under natural solar radiation. This research aims at the photocatalytic degradation of Type II Pyrethroid Pesticide (Lambda-cyhalothrin) in wastewater and agricultural runoff using Zinc Oxide Nanoparticles. The synthesized ZnO Nanoparticle (NP) was ascertained by characterization using XRD for material crystallinity and crystallite size, SEM, and particle size analysis for surface morphology and size. The EDAX spectra confirmed the presence of Zinc elements and showed that the synthesized zinc oxide nanoparticles were pure. The degradation experiment was conducted under natural solar irradiation. The initial and final/equilibrium concentration of Lambda-cyhalothrin residue were determined using High-performance liquid chromatography (HPLC) followed by computation of degradation capacity. Photocatalytic degradation of LCY was successful following the application of Zinc oxide NPs as nanocatalysts with an efficiency of about 87% as compared to the control. The synthesized Nanoparticle was found to degrade a large percentage of Lambda-cyhalothrin residue in wastewater. Exploiting its application in the remediation of pesticides in agricultural runoff may be crucial at this point.
23
Aranda, Alejandro, Richard Landers, Patricio Carnelli, Roberto Candal, Hugo Alarcón, and Juan Rodríguez. "Influence of silver electrochemically deposited onto zinc oxide seed nanoparticles on the photoelectrochemical performance of zinc oxide nanorod films." Nanomaterials and Nanotechnology 9 (January 1, 2019): 184798041984436. http://dx.doi.org/10.1177/1847980419844363.
Повний текст джерелаАнотація:
The present article examines the synthesis and characterization of zinc oxide nanorods grown on zinc oxide and silver nanoparticle seeds. Zinc oxide seeds were electrodeposited on a support of fluorine-doped tin oxide glass and heat-treated at 380°C. Silver nanoparticles were then deposited on this substrate, which was heat-treated at 160°C. Their presence was confirmed using ultraviolet–visible spectroscopy, by observing an absorption peak around 400 nm, corresponding to surface plasmon resonance. Growth of zinc oxide nanorods was achieved in a chemical bath at 90°C. The obtained films were analyzed by cyclic voltammetry, X-ray diffraction, and scanning electron microscopy. They consisted of zinc oxide with a Wurtzite-type crystal structure, arranged as nanorods of 50 nm. X-ray photoelectron spectroscopy exhibits peaks attributed to silver (0) and to the formation of silver oxide on the silver nanoparticle surface. In addition, two types of oxygen (O 1 s) were observed: oxygen from the crystalline network (O–2) and chemisorbed oxygen (–OH), for the seed and the nanorod films, respectively. The nanorods grown on zinc oxide seeds with silver deposits had a round shape and greater photoactivity than those grown without silver. This difference is attributed to the additional reflection that silver provides to the light reaching the film, thereby increasing the photogeneration from the charge carriers.
24
Nawal Hussien Mohammed and Abdulqadier Hussien Al khazraji. "Synthesis and study of zinc oxide nanoparticles and their nanocomposites." Journal of Pharmaceutical Negative Results 13, no. 4 (October 25, 2022): 790–97. http://dx.doi.org/10.47750/pnr.2022.13.04.105.
Повний текст джерелаАнотація:
Zinc oxide nanoparticles (ZnO NPs) was synthesized via chemical route using sodium hydroxide and zinc chloride (ZnCl2) as a precursor. Zinc oxide nanoparticles/Nanographite-oxide nanocomposite (ZnO/NGO) were synthesized by solution method. The calcination temperature of zinc oxide nanoparticles was 600 °C. The crystal structure of ZnO NPs with average size 32.99 nm was measured by XRD. FT-IR spectrum was used to confirm the presence of functional groups in ZnO and Zn(OH)2 NPs. The dynamic light scattering (DLS) gave a wider nanoparticle size distribution in two peaks with average 725 nm, also the BET and BJH analysis indicated that ZnO NPs / NGO nanocomposite have a well surface area with good nanoparticles diffusion compering as ZnO NPs. The morphology analysis by FESEM technique was given different sizes and shapes nanoparticles (oval, sheet and cubic) with average diameters extended 228.065 and 134.784 nm , 39.63 and 127 nm for Zn(OH)2 and ZnO NPs , NGO sheet and ZnO/NGO nanocomposite respectively.
25
Tahoora Taskeen. L, Hannah R, and Rajeshkumar S. "Free Radical Scavenging Activity of Fruit Formulation Mediated Zinc Oxide Nanoparticles." International Journal of Research in Pharmaceutical Sciences 11, no. 3 (August 7, 2020): 4690–94. http://dx.doi.org/10.26452/ijrps.v11i3.2757.
Повний текст джерелаАнотація:
To determine the free radical scavenging activity of fruit formulation mediated zinc oxide nanoparticle. Zinc oxide nanoparticles are widely known for their antimicrobial agent, anti-diabetic, anti-inflammatory, wound healing, antioxidant and optic properties. Oxidative degradation of lipids, proteins, food and cosmetics involves a radical-chain reaction with release of free radicals. These free radicals are extremely reactive and can even attack relatively stable molecules like the DNA bases. With a recent rise in diseases associated with increased oxidative stress, a good antioxidant seems to be the need of the hour. Synthesis of zinc oxide nanoparticles using Punica granatum and Elettaria cardamomum extract. Characterisation of the nanoparticles using UV–Visible spectroscopy and Scanning electron microscope. It is followed by the DPPH radical scavenging assay to determine the antioxidant activity. With an increase in the concentration of zinc oxide nanoparticles, there was an increase in the percentage of inhibition. When compared to the standard, the zinc oxide nanoparticles showed increased antioxidant activity even in small concentrations. Punica granatum and Elettaria cardamomum mediated Zinc oxide nanoparticles showed considerable antioxidant property even in small quantity when compared with standard vitamin C. Further studies need to be carried out to check for its potency as a prophylactic agent.
26
Meng, Lingling, Lina Du, Yaqiong Shen, Shan Cong, Qiuyan Zhai, and Yan Wang. "Biosynthesis and Characterization of Zinc Oxide Nanoparticles for the Systemic Treatment of Patients with Lymphoma in Nursing Care." Science of Advanced Materials 12, no. 1 (January 1, 2020): 137–43. http://dx.doi.org/10.1166/sam.2020.3529.
Повний текст джерелаАнотація:
Zinc oxide (ZnO) nanoparticles recently are of significant consideration because of their applications as nontoxic metal oxides. This study is mainly intended to improve a simple, efficient, and environment-friendly method for preparation of ZnO nanoparticles. This process has been developed based on plant-intervened synthesis by making use of microwave Saturejahortensis aqueous extract. We have further characterized the obtained Zinc oxide nanoparticles by using different techniques. Additionally, their cytotoxic potential was inspected via MTT assay against both B lymphoma, A20 and T lymphoma, EL4 cells lines. The zinc oxide nanoparticle exposed cells for about 24 h showed diminished cell viability in the tested cell lines where EL4 cells has been reduced to 75% of control after 24 h, whereas A20 cells were lowered to 68% of control. ZnO-NPs have proficiently hindered EL4 cell DNA synthesis at 100 μg concentration whereas completely blocked the DNA proliferation at about 50 g concentration. However, A20 cells besides presented similar propensity, thus exploring the ZnO-NPs potential to treat lymphomas.
27
Shilpa Merlyn Jose, Hannah.R, and Rajeshkumar S. "Preparation of zinc oxide nanoparticles using punica granatum and elettaria cardamomum fruit extract and determining its antibacterial activity against lactobacillus." International Journal of Research in Pharmaceutical Sciences 11, no. 3 (July 8, 2020): 3372–76. http://dx.doi.org/10.26452/ijrps.v11i3.2473.
Повний текст джерелаАнотація:
To determine the antibacterial activity of Zinc oxide nanoparticles synthesised using Punica granatum and Elettaria cardamomum fruit extract against Lactobacillus. Punica granatum and Elettaria cardamomum have been known for their antimicrobial, antioxidant and anti-inflammatory activity. The phytochemicals present in these fruits have experimented for the preparation of various metal and metal oxide nanoparticles. Zinc oxide is a widely used metal oxide nanoparticle known for its good antimicrobial activity against a host of microbes. The current study was conducted to determine its effect against Lactobacillus, a bacteria known for its role in the progression of dental caries. Preparation of fruit extract mediated zinc oxide nanoparticles. Determining the characteristics of the nanoparticles using UV spectroscopy and SEM. Analysing the activity of these nanoparticles against Lactobacillus using agar well diffusion method. The zone of inhibition increased if the concentration of the fruit mediated zinc oxide nanoparticles increased. But it was incomparable to the standards. Hence, further studies need to be conducted using different concentration of Punica granatum and Elettaria cardamomum to determine the optimum fruit extract required for the preparation of the nanoparticles. The resultant nanoparticles can be used as an effective antimicrobial agent against Lactobacillus
28
Shojai Nasab, Sajad, and Saeed Zahmatkesh. "Preparation, structural characterization, and gas separation properties of functionalized zinc oxide particle filled poly(ether-amide) nanocomposite films." Journal of Plastic Film & Sheeting 33, no. 1 (August 1, 2016): 92–113. http://dx.doi.org/10.1177/8756087916638120.
Повний текст джерелаАнотація:
In this study, a new diacid monomer containing amide, imide, and sulfone functional groups was successfully used to synthesize a new poly(ether-amide) for membrane-based gas separation applications. The synthesized poly(ether-amide) was soluble in organic solvents, has high thermal stability (up to 460℃ under nitrogen atmosphere, for 10% weight loss), and high glass transition temperature (Tg = 274℃). This poly(ether-amide) was combined with different amounts of surface-modified zinc oxide nanoparticles to provide organic–inorganic nanocomposites. The optically transparent and flexible membranes of these hybrid nanocomposites were prepared. The obtained materials were characterized by Fourier transform-infrared spectroscopy, thermal gravimetric analysis, differential scanning calorimetry, X-ray powder diffraction, field emission-scanning electron microscopy, and transmission electron microscopy techniques. Transmission electron microscopy of the nanocomposite film with 15 wt% zinc oxide confirms that the nanoparticles are well dispersed in the polymer matrix. Thermal gravimetric analysis data indicated that the hybrid materials had better thermal behavior with increasing surface-modified zinc oxide nanoparticles nanoparticle content. The poly(ether-amide)/surface-modified zinc oxide nanoparticles nanocomposite film mechanical properties improved with increasing surface-modified zinc oxide nanoparticles content. The permeability and selectivity of the poly(ether-amide)/zinc oxide membranes as a function of the surface-modified zinc oxide nanoparticles weight percentage were studied, and the results indicated that the CO2 and CH4 permeability increased with increasing zinc oxide content. In general, the membranes prepared from these polymers showed very good permeability and permselectivity for a pair of gases.
29
Nivedhita G, Rajeshkumar S, Anitha Roy, Nagalingam M, and Lakshmi T. "Maranta arundinacea root assisted zinc oxide nanoparticles and its characterisation using TEM and UV-vis spectroscopy." International Journal of Research in Pharmaceutical Sciences 11, no. 3 (July 6, 2020): 2968–72. http://dx.doi.org/10.26452/ijrps.v11i3.2387.
Повний текст джерелаАнотація:
Arrow root is a tropical root crop cultivated for its starchy rhizomes that have carbohydrate contents. Zinc oxide nanoparticles have emerged a promising potential in biomedicine, especially in the fields of anticancer, wound healing, free radical scavenging and antimicrobial including antibacterial, antifungal and antiviral research fields, which might be worried with their potent ability to trigger extra reactive oxygen species (ROS) production, launch zinc ions, and induce mobile apoptosis. 1 gram of Arrow root powder extract was mixed with 100 mL of water and filtered for nanoparticles synthesis. The zinc sulphate was used as a precursor for the zinc oxide nanoparticles synthesis and 30 mM was used. 50 mL of freshly prepared root extract and zinc sulphate solution was added together for the synthesis of Zinc oxide nanoparticles, which was then dried and characterisedcharacterized using transmission electron microscope (TEM) and during reaction it was characterized using UVvis spectroscopy method. A spherical shaped nanoparticle with plant extract in the background was observed. The peak at 300 nm confirm the nanoparticles synthesis using root extract. Based on our results we confirmed the capability of arrow root for the zinc oxide nanoparticles synthesis and it will be used for the various biomedical application in future.
30
Mulyani, Fitry, M. Diki Permana, Safri Ishmayana, Iman Rahayu, and Diana Rakhmawaty Eddy. "Optimisation of Zinc Oxide Nanoparticle Biosynthesis Using Saccharomyces Cerevisiae with Box-Behnken Design." Revista de Chimie 72, no. 1 (February 3, 2021): 79–89. http://dx.doi.org/10.37358/rc.21.1.8405.
Повний текст джерелаАнотація:
Zinc oxide nanoparticles have wide applications as catalysts, antimicrobial agents, drug delivery agents, etc. because of their intrinsic properties. Various methods can be applied to synthesise nanoparticles, one of which is the biosynthesis process. Biosynthesis is more eco-friendly than chemical and physical methods. In the present study, the optimisation of zinc oxide nanoparticle biosynthesis using the yeast Saccharomyces cerevisiae was performed by applying a response surface method called the Box�Behnken design (BBD). Three factors were optimised in the present study, namely the concentration of zinc acetate as the precursor (X1), concentration of the S. cerevisiae fermentation broth (X2), and the incubation time (X3). The mass of zinc oxide nanoparticles (Y) was recorded as the response of the experiment. The product was then characterised by fourier transform infrared spectroscopy (FTIR), X-Ray diffraction (XRD), scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), and particle size analyser (PSA). The optimum conditions for the preparation of zinc oxide nanoparticles were found to be 0.3 M, 100% (v/v), and 24 h as the zinc acetate concentration, medium concentration, and incubation time, respectively. The FTIR analysis showed peaks at ~600 cm−1, which is characteristic for ZnO stretching. From the XRD result, the ZnO nanoparticles with hexagonal structure was confirm. The SEM/EDS analysis confirmed that the morphology was spherical and showed the major energy emission for zinc and oxygen. Moreover, the PSA analysis revealed that the smallest size was 218.6 nm (12%) when the synthesis was performed at the optimum conditions, while when the incubation time was prolonged for 120 h, the size decreased to 134.2 nm.
31
Jyoti, N. S. Ghosh, I. Rani, S. Mujwar, and B.K. Dey. "In-silico STUDIES OF UNIQUE SCHIFF BASE OF BENZIMIDAZOLE DERIVATIVES AS ANTICANCER AGENTS." RASAYAN Journal of Chemistry 16, no. 03 (2023): 1403–15. http://dx.doi.org/10.31788/rjc.2023.1638365.
Повний текст джерелаАнотація:
Accumulating synthetic pesticides in the living system has brought about several critical alerts from researchers as it interferes with the essential processes in the body. Metal oxide nanoparticles possess suitable properties including band gap and have played an important role in the photocatalytic degradation of toxic chemicals in wastewater and the environment under natural solar radiation. This research aims at the photocatalytic degradation of Type II Pyrethroid Pesticide (Lambda-cyhalothrin) in wastewater and agricultural runoff using Zinc Oxide Nanoparticles. The synthesized ZnO Nanoparticle (NP) was ascertained by characterization using XRD for material crystallinity and crystallite size, SEM, and particle size analysis for surface morphology and size. The EDAX spectra confirmed the presence of Zinc elements and showed that the synthesized zinc oxide nanoparticles were pure. The degradation experiment was conducted under natural solar irradiation. The initial and final/equilibrium concentration of Lambda-cyhalothrin residue were determined using High-performance liquid chromatography (HPLC) followed by computation of degradation capacity. Photocatalytic degradation of LCY was successful following the application of Zinc oxide NPs as nanocatalysts with an efficiency of about 87% as compared to the control. The synthesized Nanoparticle was found to degrade a large percentage of Lambda-cyhalothrin residue in wastewater. Exploiting its application in the remediation of pesticides in agricultural runoff may be crucial at this point.
32
Sharma, Pooja, Sanjay Kumar, and Navneet Bithel. "Green fabrication of zinc oxide nanoparticles by Anagallis arvensis ethanolic extract and their antibacterial properties." Environment Conservation Journal 24, no. 2 (May 10, 2023): 343–46. http://dx.doi.org/10.36953/ecj.23592586.
Повний текст джерелаАнотація:
Green approach of zinc oxide nanoparticle fabrication is a reliable reaction that has compatibility with many biological properties. In the present study the approach of zinc oxide nanoparticle has been synthesized by A. arvensis aerial part using ethanol extract. The morphological, compositional and structural properties have been investigated by SEM, XRD, and FTIR studies. XRD technique demonstrated the crystallite size of 17nm with the help of Debye-Scherrer's equation which was obtained in nanorange. SEM technique demonstrated their microscopic agglomerated crystal image of green synthesizes metal in zinc oxide nanoparticle. FTIR technique represents the different types of biomolecules i.e. phenol, alkynes etc. that are responsible for good nanoparticle fabrication. These biomolecules work as encapsulation and stabilization agents for nanoparticle fabrication. These all properties of nanoparticle fabrication have been responsible for the antimicrobial activity.
33
Gopalakrishnan, Ramasamy, and Subramanian Nithiyanantham. "Effect of ZnO Nanoparticles on Cement Mortar for Enhancing the Physico-Chemical, Mechanical and Related Properties." Advanced Science, Engineering and Medicine 12, no. 3 (March 1, 2020): 348–55. http://dx.doi.org/10.1166/asem.2020.2505.
Повний текст джерелаАнотація:
Zincoxide nanoparticles have been incorporated into the cementitious materials for enhancing their physico-chemical and mechanical properties. The decrease in particle size will leads the increase in surface to volume ratio as compared to conventional micro-particles. In this investigation to evaluate physical, chemical and mechanical properties of Ordinary Portland Cement (OPC) containing zinc oxide nanoparticles. Zinc oxide nanoparticles used with replacement of various properties such as 0%, 1%, 2%, 3%, 4% and 5% by weight with ordinary Portland cement. The ordinary Portland cement mortar, nano zincoxide cement mortars prepared with the water-binder ratio (w/b ratio) as 0.4 and cement-sand ratio as 1:3 by weight. The prepared mortars are analyzed through compressive strength, setting time, flexural strength, porosity, water absorption, sulphate attack, electrical resistivity and with SEM analysis. The setting time of zinc oxide nano particle significantly decreased and enhanced the compressive strength of Portland cement mortar. The flexural strength outcomes showed that the cement mortars with zinc oxide nanoparticle were higher rather than Portland cement mortar. Microstructure of mortar contained zinc oxide nano particles illustrate that the nano zinc oxide particles filled the pores significantly and so large size of calcium hydroxide crystals reduced afterwards more hydration products formed.
34
Raja Ahmad, Raja Adibah, Zawati Harun, Mohd Hafiz Dzarfan Othman, Hatijah Basri, Muhamad Zaini Yunos, Azlinnorazia Ahmad, Siti Hajar Mohd Akhair, et al. "Biosynthesis of zinc oxide nanoparticles by using fruits extracts of Ananas Comosus and its antibacterial activity." Malaysian Journal of Fundamental and Applied Sciences 15, no. 2 (April 16, 2019): 268–73. http://dx.doi.org/10.11113/mjfas.v15n2.1217.
Повний текст джерелаАнотація:
Biosynthesis of metallic nanoparticles using plants, enzymes, and microorganism have been known as eco-friendly alternatives to conventional physical and chemical methods. Recently, the biological synthesis of nanoparticles has been a keen interest amongst researchers and scientist due to its simple technique, eco-friendliness, non-toxic, inexpensive and potential to perform in antibacterial activity. Thus, in this current work, the synthesis of zinc oxide (ZnO) nanoparticles using reduction agent from fruit extracts of Ananas Comosus is reported. The biosynthesized zinc oxide was characterized using Field Emission Scanning Electron Microscope (FESEM) with Energy Dispersive X-ray analysis (EDX), UV-Vis absorption spectroscopy and X-ray diffraction (XRD). The average size of the nanoparticles was found to be in the range of 30-57nm. The antibacterial activity of ZnO nanoparticles was carried out via agar diffusion method against pathogenic organisms. It is observed that the biosynthesized ZnO in the process has the efficient antibacterial activity. In conclusion, the green synthesis of zinc oxide nanoparticles using the fruit extract of Ananas Comosus is considered as a potential additive to substitute other metal oxides such as silver (Ag) and titanium dioxide (TiO2)but also provide antibacterial effect that able to enhance the nanoparticle performance.
35
Greeshma K P, Muthulingam S, R Thamizselvi, and Dhanya B Sen. "Antimicrobial studies and characterization of ZnO nanoparticles by chemical method." GSC Advanced Research and Reviews 8, no. 2 (August 30, 2021): 071–77. http://dx.doi.org/10.30574/gscarr.2021.8.2.0150.
Повний текст джерелаАнотація:
Nowadays, nanotechnology is receiving worldwide recognition due to being its applications in various fields. Medium temperature and eco-friendly methods have shown great potential among nanoparticle synthesis. Many reducing agents are available for the synthesis of ZnO nanoparticles; here we presented a simple solution method for the development of nano crystalline Zinc Oxide particles. Zinc acetate dihydrate was used as a starting material and synthesized particles were characterized by UV-Visible, FT IR, SEM, and EDAX analysis. Characterization studies revealed hexagonal nano crystalline Zinc Oxide particles with excellent morphological properties. The synthesized nanoparticles exhibit excellent antimicrobial activities against gram-positive and gram-negative bacteria.
36
Pintilie, Stefan Catalin, Laurentia Geanina Tiron, Iulian Gabriel Birsan, Daniel Ganea, and Stefan Balta. "Influence of ZnO Nanoparticle Size and Concentration on the Polysulfone Membrane Performance." Materiale Plastice 54, no. 2 (June 30, 2017): 257–61. http://dx.doi.org/10.37358/mp.17.2.4828.
Повний текст джерелаАнотація:
The activity of using membrane technology has developed fast in the treatment of wastewater, drinking water and process water production. The main challenges in membrane filtration are fouling reduction, permeability increase and high efficiency in retention. The best example of membrane enhancement is increasing hydrophilicity. Nanoparticles have been proven that their presence in the membrane matrix increases the water affinity significantly. Although the zinc oxide nanoparticles have a positive effect over the membrane performance, the influence of zinc oxide (ZnO) nanoparticle size has not been studied enough. Two sizes of nanoparticle of ZnO and three concentrations were used for the preparation of composite polysulfone ultrafiltration membranes. The effects of the ZnO nanoparticles in the membrane matrix on the permeation properties, flux stability and retention were tested. SEM, EDX, porosity and contact angle measurement were conducted in this article, also. The experimental results indicated that ZnO-PSf composite membranes exhibits significant differences in the membrane properties due to nanoparticle addition and regardless of their size it leads to an increase in hydrophilicity, flux, permeability, retention and porosity. Decreasing the nanoparticle size leads to an increase in membrane performance.
37
Barbillon, Grégory. "Latest Novelties on Plasmonic and Non-Plasmonic Nanomaterials for SERS Sensing." Nanomaterials 10, no. 6 (June 19, 2020): 1200. http://dx.doi.org/10.3390/nano10061200.
Повний текст джерелаАнотація:
An explosion in the production of substrates for surface enhanced Raman scattering (SERS) has occurred using novel designs of plasmonic nanostructures (e.g., nanoparticle self-assembly), new plasmonic materials such as bimetallic nanomaterials (e.g., Au/Ag) and hybrid nanomaterials (e.g., metal/semiconductor), and new non-plasmonic nanomaterials. The novel plasmonic nanomaterials can enable a better charge transfer or a better confinement of the electric field inducing a SERS enhancement by adjusting, for instance, the size, shape, spatial organization, nanoparticle self-assembly, and nature of nanomaterials. The new non-plasmonic nanomaterials can favor a better charge transfer caused by atom defects, thus inducing a SERS enhancement. In last two years (2019–2020), great insights in the fields of design of plasmonic nanosystems based on the nanoparticle self-assembly and new plasmonic and non-plasmonic nanomaterials were realized. This mini-review is focused on the nanoparticle self-assembly, bimetallic nanoparticles, nanomaterials based on metal-zinc oxide, and other nanomaterials based on metal oxides and metal oxide-metal for SERS sensing.
38
Wang, Kailai, and Edward P. C. Lai. "Electrochemical Sensing of Zinc Oxide and Peroxide Nanoparticles: Modification with Meso-tetrakis(4-carboxyphenyl) Porphyrin." Chemosensors 11, no. 7 (June 30, 2023): 369. http://dx.doi.org/10.3390/chemosensors11070369.
Повний текст джерелаАнотація:
An electrochemical method was developed to investigate the redox properties of zinc oxide (ZnO), zinc peroxide (ZnO2), and sodium-doped zinc peroxide (Na-ZnO2) nanoparticles. The intention was to distinguish the identity of these nanoparticles among themselves, and from other transition metal oxide nanoparticles (TMONPs). Analysis of 3 mM sodium metabisulfite by cyclic voltammetry (CV) produced anodic/cathodic peak currents that are linearly related to the mass of deposited nanoparticles. A graphite working electrode was essential to the oxidation of metabisulfite. ZnO nanoparticles were crucial to the enhancement of metabisulfite oxidation current, and PPy coating could suppress the current enhancement by covering all nanoparticle surfaces. Furthermore, meso-tetrakis(4-carboxyphenyl) porphyrin was demonstrated to be a good chemical reagent that facilitates the differentiation of ZnO from ZnO2 and nanoparticles by CV analysis.
39
Hajimohammad, Afsaneh, and Leila Fozouni. "Antibacterial Effect of Zinc Oxide Nanoparticles on Mupirocin-Resistant Staphylococcus aureus Isolated From Nasal Carriers." International Journal of Basic Science in Medicine 3, no. 2 (June 12, 2018): 78–82. http://dx.doi.org/10.15171/ijbsm.2018.14.
Повний текст джерелаАнотація:
Background: Staphylococcus aureus is one of the main human pathogens which should be taken into account as one of the main hospital infections due to its colonization in the nose of carrier personnel.The present study aims to determine the frequency of resistance to mupirocin in the hospital carriers of Staphylococcus aureus, and to investigate the antimicrobial effect of Zinc Oxide nanoparticles on the growth of resistant strains. Methods: In this cross-sectional study, samples were taken from the anterior nasal part of 150 hospital staff in Gorgan, using a sterile swab. Being cultured on Mannitol salt agar, the suspected colonies were identified through Gram staining, as well as catalase, coagulase and DNase tests. Resistance of the strains to mupirocin was tested using microdilution Broth test. Besides, the antibacterial effect of Zinc Oxide nanoparticles(ZnONPs) on the mupirocin-resistant strains was also investigated using agar well diffusion method. Results: In this study, the frequency of Staphylococcus aureus was 32%, out of which 6.2% showed high resistance to mupirocin and 29.2% showed low resistance to this antibiotic. The results of this study showed that Zinc Oxide nanoparticles have the most inhibitory effect on the growth of mupirocin-resistant Staphylococcus aureus in the density of 400 mg/ml. Conclusion:The Zinc Oxide nanoparticle used in this study had a high antimicrobial activity against all the drug-resistant Staphylococcus aureus strains, and their bactericidal properties also increased by raising the density of the nanoparticle.
40
Srinivasan, Manoj Kumar, Bichandarkoil Jayaram Pratima, Ravichandiran Ragunath, Briska Jifrina Premnath, and Namasivayam Nalini. "ZnO Nanoparticles Synthesis, Toxicity, Delivery systems and Bio medical applications." Research Journal of Biotechnology 18, no. 4 (March 15, 2023): 141–55. http://dx.doi.org/10.25303/1804rjbt1410155.
Повний текст джерелаАнотація:
In recent decades, metal oxide nanoparticles have acquired relevance in biology and medicine due to their unique physicochemical properties. Because of its cheap cost, biodegradability and low toxicity, zinc oxide nanoparticles (ZnO-NPs) have attracted a lot of interest from researchers for therapeutic and diagnostic applications. Zinc oxide (ZnO) has been studied for various biological applications due to its unique semiconducting, optical and piezoelectric characteristics. The growing interest in nano zinc oxide has led to the discovery and development of nanoparticle production technologies. ZnO nanocomposites with varied morphologies have recently been prepared using a physical and chemical method. ZnO NPs have also been employed to deliver different bioactive and chemotherapeutic anticancer medicines to tumour cells in a targeted and sustained manner. This review discusses on the properties, synthesis, drug delivery method for cancer treatment and many other biological uses of ZnO NPs.
41
SAWYER, SHAYLA, LIQIAO QIN, and CHRISTOPHER SHING. "ZINC OXIDE NANOPARTICLES FOR ULTRAVIOLET PHOTODETECTION." International Journal of High Speed Electronics and Systems 20, no. 01 (March 2011): 183–94. http://dx.doi.org/10.1142/s0129156411006519.
Повний текст джерелаАнотація:
Zinc Oxide ( ZnO ) nanoparticles were created by a top-down wet-chemistry synthesis process ( ZnO - A ) and then coated with polyvinyl-alcohol (PVA) ( ZnO - U ). In ZnO - U , strong UV emission was apparent while the parasitic green emission, which normally appears in ZnO suspensions, was suppressed. A standard lift-off process via e-beam lithography was used to fabricate a detector by evaporating Aluminum ( Al ) as ohmic electrodes on the ZnO nanoparticle film. Photoconductivity experiments showed that linear current-voltage response were achieved and the ZnO - U nanoparticles based detector had a ratio of UV photo-generated current more than 5 times better than that of the ZnO - A based detector. In addition, non-linear current-voltage responses were observed when interdigitated finger Gold ( Au ) contacts were deposited on ZnO - U . The UV generated current to dark current ratios were between 4 and 7 orders of magnitude, showing better performance than the photodetector with Al contacts. ZnO - U were also deposited on Gallium Nitride ( GaN ) and Aluminum Gallium Nitride ( AlGaN ) substrates to create spectrally selective photodetectors. The responsivity of detector based on AlGaN is twice that of commercial UV enhanced Silicon photodiodes. These results confirmed that ZnO nanoparticles coating with PVA is a good material for small-signal, visible blind, and wavelength selective UV detection.
42
Srinisha M, Rajeshkumar S, Lakshmi T, and Anitha Roy. "Amla fruit mediated synthesis of zinc oxide nanoparticles and its antifungal activity." International Journal of Research in Pharmaceutical Sciences 10, no. 4 (October 16, 2019): 2826–29. http://dx.doi.org/10.26452/ijrps.v10i4.1554.
Повний текст джерелаАнотація:
To study the antifungal activity of ZnO nanoparticles synthesised from amla fruit. Nanotechnology has offered great possibilities in various fields of science and technology. It has been playing a crucial role in the development of modern materials in recent years. The antifungal activity of ZnO occurs by the deformation of fungal hyphae leading to the death of fungal hyphae, which may lead to cellular destruction. Preparation of plant extract, Synthesis of nanoparticles, Characteristics of nanoparticles, Preparation of nanoparticles powder, Antifungal activity of nanoparticles against Candida albicans.The peak found in the spectroscopy indicates the formation of ZnO nanoparticle. It is clearly seen from the graph that increase in concentration results in an increase in antifungal activity. The antifungal activity, in this case, was proved with Aspergillus niger and Aspergillus terreus. The results conclude that ZnO nanoparticle can be used to prevent any antifungal diseases.
43
Thomas*, Anitha, M. Shailaja Raj, and Jagirdar Venkataramana. "TiO2: ZnO nanocomposites in treatment of dental plaques." International Journal of Bioassays 5, no. 10 (October 1, 2016): 4977. http://dx.doi.org/10.21746/ijbio.2016.10.0012.
Повний текст джерелаАнотація:
Dental caries is a major concern effecting most of the individuals today. Statistics show that 69% of adults aged 35 to 44 years have lost permanent tooth due to accident, gum disease failed root canal or tooth decay. Dental plaque is a general term for the diverse microbial community found on tooth surface, embedded in matrix of polymers of bacteria. Nanoparticles considered being of a size not greater than 100 nm have unique properties to combat infection. Nanocomposite is a matrix to which nanoparticles have been added to improve a particular property of the material. The present study deals with the antimicrobial studies of nanocomposite preparations of Titanium dioxide and Zinc oxide. Titanium dioxide and Zinc oxide nanocomposites are found to be effective in inhibiting the growth of bacteria. The present work is to prepare different proportions of nanocomposites of these oxides and find out if the effectivity is more when compared to using the nanoparticle alone. Some nanocomposite materials have been shown to be 1000 times tougher than the bulk component materials. The study carried out shows that the antimicrobial activity of nanocomposites is more effective than the nanoparticle alone providing best alternative to dental implant surgery.
44
Nabeel, Asmaa I. "Samarium enriches antitumor activity of ZnO nanoparticles via downregulation of CXCR4 receptor and cytochrome P450." Tumor Biology 42, no. 3 (March 2020): 101042832090999. http://dx.doi.org/10.1177/1010428320909999.
Повний текст джерелаАнотація:
Cancer is the leading cause of death and exhausts human and economic resources for treatment and protection. Zinc oxide nanoparticles play an effective role in tumor treatment but with some cautions, such as overexpression of cytochrome P450, hepatic overload, and the mammalian target of rapamycin pathway resistance. Although lanthanides have antitumor activity, their use is limited. Therefore, the current study aims to improve the effectiveness of zinc oxide nanoparticle via doping with lanthanides, such as samarium. In vitro study revealed that samarium doped with zinc oxide showed more antitumor activity than the other lanthanides, and the antitumor activity depends on the concentration of samarium in the nanocomposite. The in vivo experiment on mice bearing Ehrlich solid tumor revealed that intramuscular injection of samarium/zinc oxide downregulates the expressions of CXCR4 and PI3K/Akt/mammalian target of rapamycin pathway in respect to Ehrlich solid tumor group. Regarding the apoptotic biomarkers, samarium/zinc oxide upregulates the apoptotic biomarker; Bax accompanied with the mitotic catastrophe which was indicated by cell cycle arrest in G2 phase. Moreover, samarium:zinc oxide nanoparticles exhibited minimum toxicity which was indicated by suppressed activities of cytochrome P450 and hepatic enzymes, including alanine transaminase and aspartate transaminase. In addition, the histopathological finding, as well as immunophenotyping results, appreciated the biochemical finding. Therefore, samarium:zinc oxide might be offered a new approach to improve the effectiveness of zinc oxide nanoparticles along with lower toxic effect. Also, samarium:zinc oxide nanoparticles can be a candidate as a new antitumor compound to detect its mode of action.
45
Tawfeeq, Amer Talib Tawfeeq, Husam Al-Deen Mohammed Kadhim Kadhim, Nahi Yusif Yseen Yseen, Saba K. Kalil Kalil, Teaba H. Jafar Jafar, Aseel F. Ghedan Ghedan, and Rasha A. Hussein Hussein. "Targeting Mice Mammary Adenocarcenoma Cells with Zinc Oxide Nanoparticles." Journal of Biotechnology Research Center 9, no. 2 (June 1, 2015): 14–20. http://dx.doi.org/10.24126/jobrc.2015.9.2.426.
Повний текст джерелаАнотація:
The cytotoxic effect of zinc oxide nanoparticles against mice mammary adenocarcenoma cells wascarried out in vitro. The used nanoparticles were synthesized by pulsed laser ablation in liquidmethods; the used liquid was deionized water. Colloidal suspension of zinc oxide nanoparticles wassynthesized by Q-switched Nd: YAG pulse laser device (1064 nm) laser energy was 600 mJ and pulseduration was 10 nanosecond. High purity metallic zinc plate was submerged in 10 ml deionizedwater in 50 ml glass baker and ablated with 1000 pulse at room temperature. The nanospecificitiesof the synthesized nanoparticle colloidal were characterized with UV-Vis scanningspectrophotometer. Atomic force microscope was used to determine the particle size distribution andparticles shape. The ZnO crestless formation was characterized by X-ray diffraction.Mice mammary adenocarcenoma cells was treated with 25, 50, 100 ppm of ZnO nanoparticles.Results indicated a significant toxicity of the ZnO nanoparticles toward cancer cells, this toxicitycorrelated directly with ZnO nanoparticles elevated concentrations. These result need to be furtherinvestigated and the molecular mechanism of ZnO nanoparticles effect should be more clarify.
46
Saadah, Fatkhiyatus, Rizka Zakiyatul Miskiyah, and Ali Khumaeni. "Zinc Oxide Nanoparticles (ZnONPs) Photocatalyst using Pulse Laser Ablation Method for Antibacterial in Water Polluted." Journal of Physics and Its Applications 2, no. 2 (June 6, 2020): 102–6. http://dx.doi.org/10.14710/jpa.v2i2.8001.
Повний текст джерелаАнотація:
Synthesis of zinc oxide nanoparticles by pulse laser ablation method has been successed carried out. Synthesis was carried out in aquades medium with a repetition rate variation of 5 Hz, 10 Hz and 15 Hz pulse laser yielding brown colloids. The higher laser repetition rate, the colloidal color will be more dark brown. Characterization of zinc oxide nanoparticles includes UV-Vis, SEM-EDX, FTIR and XRD. The image of SEM shows that zinc oxide nanoparticles have a round shape. Measurement of particle distribution with imageJ software from SEM images showed that ZnO nanoparticles were 23.63 nm, 12.13 nm and 5.59 nm for 5 Hz, 10 Hz and 15 Hz shots. The EDX spectrum analysis results show that only Zn and O atoms in the ZnO nanoparticles colloid are synthesized. FTIR results showed that sprocket ZnO was formed at wave number 457 cm-1 and 545 cm-1. The XRD analysis results also show some peaks known as the ZnO phase. This indicates that ZnO nanoparticles have been formed. The testing of the antibacterial activity of ZnO nanoparticles using a liquid dilution method with nanoparticle concentrations of 40 ppm, 60 ppm and 80 ppm. The test results showed the percentage of degradation of Escherichia coli bacteria at concentrations of 40 ppm, 60 ppm and 80 ppm respectively at 89.60%, 97.76% and 98, 70%.
47
Rahman, Mohammad Mizanur. "Polyurethane/Zinc Oxide (PU/ZnO) Composite—Synthesis, Protective Property and Application." Polymers 12, no. 7 (July 11, 2020): 1535. http://dx.doi.org/10.3390/polym12071535.
Повний текст джерелаАнотація:
A polyurethane (PU) is a multifunctional polymer prepared by using more than two types of monomers. The unique properties of PU come from monomers, thus broadening the applicability of PU in many different sectors. The properties can be further improved by using many nanoparticles. Different metal oxides as nanoparticles are also widely used in PU materials. ZnO is a widely used inorganic metal oxide nanoparticle for improving polymer properties. In this review article, the techniques to prepare a PU/ZnO composite are reviewed; the key protective properties, such as adhesive strength and self-healing, and applications of PU/ZnO composites are also highlighted. This review also highlights the PU/ZnO composite’s current challenges and future prospects, which will help to broaden the composite practical application by preparing environmentally friendly composites.
48
Rokbani, Hajer, France Daigle, and Abdellah Ajji. "Long- and short-term antibacterial properties of low-density polyethylene-based films coated with zinc oxide nanoparticles for potential use in food packaging." Journal of Plastic Film & Sheeting 35, no. 2 (January 2, 2019): 117–34. http://dx.doi.org/10.1177/8756087918822677.
Повний текст джерелаАнотація:
Concerns in food safety and the need for high-quality foods have increased the demand for extending the shelf life of packaged foods. Subsequently, promoting and investigating the development of antibacterial materials for food packaging has become inevitable. Zinc oxide nanoparticles have attracted attention lately owing to their multifunctional properties, especially antibacterial activity. For this study, antibacterial low-density polyethylene films were prepared by coating zinc oxide nanoparticles onto their surface. The low-density polyethylene film antibacterial activity was evaluated toward Gram-positive and Gram-negative bacteria. The scanning electron microscopy images showed that using anhydride-modified low-density polyethylene (LDPE-g-AM) resin permitted improved zinc oxide nanoparticle distribution on the low-density polyethylene film surface, reduced the agglomerate sizes, and reinforced the zinc oxide nanoparticle bonding to the low-density polyethylene film surface. We found that the coated low-density polyethylene films exhibited high antibacterial activity against both strains. The antibacterial tests also proved that the coated films retained their antibacterial efficiency toward Escherichia coli, even after eight months, with a reduction rate higher than 99.9%, whereas for Staphylococcus aureus the antibacterial properties for the linear low-density polyethylene (LLDPE) films decreased at eight months and improved for the LDPE-g-AM films. When the zinc oxide coated films were laminated with neat low-density polyethylene, only the LDPE-g-AM was still active against E. coli provided that the lamination thickness does not go beyond 8 µm. This research demonstrated that the coated low-density polyethylene films have excellent attributes when used as an active coating in the food packaging industry.
49
SHI, HAO-WEI, HONG-ZHEN XIE, JIN-KU LIU, and YAN WANG. "PREPARATION AND CHARACTERIZATION OF ELECTRIC ZAO NANOPARTICLES." Nano 05, no. 04 (August 2010): 215–20. http://dx.doi.org/10.1142/s1793292010002128.
Повний текст джерелаАнотація:
The white good dispersion zinc aluminium oxide (ZAO) nanoparticles were efficiently prepared by solid phase synthesis method. The morphologies, structures, photoelectricity of the ZAO nanoparticles and the thermochemistry behavior of the precursor were analyzed by TEM, XRD, UV-vis and TG, etc. The phytotoxicity properties of the ZAO nanoparticles were researched for the first time. The results show that the ZAO nanoparticles have a strong inhibition of seed germination and root growth. The biological toxicity of ZAO nanoparticle reduces along with the enlargement of nanoparticle size.
50
Arthi Feiona, T., G. Sabeena, M. Sakthi Bagavathy, E. Pushpalaksmi, J. Jenson Samra, and G. Annadurai. "Synthesis and Characterization of ZnO-MMT Nanocomposite for Antibacterial Activity Studies." Journal of Applied Sciences and Environmental Management 24, no. 6 (July 17, 2020): 1079–84. http://dx.doi.org/10.4314/jasem.v24i6.21.
Повний текст джерелаАнотація:
ZnO oxide Nanoparticle and ZnO oxide with Montmorillonite nanocomposite were prepared by an environmentally friendly, efficient, and inexpensive method that was synthesized using the chemical method. ZnO nanoparticles as an effective antibacterial material were immobilized on the surface of montmorillonite (MMT). The objectives of this paper are to summarize our research activities in (a) developing processes to dispersenanomaterials (undoped and doped zinc oxide powders) in the polymers matrix, (b) using X-ray diffraction (XRD), Fourier Transform Infra-Red Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM) and Thermo Gravimetric Analysis (TGA) techniques to characterize polymer matrix structures, (c) studying structure-property relationship of these types of new materials, and (d) evaluating the antibacterial performance of these materials for different applications. The results showed that the ZnO nanocomposite was uniformly dispersed in the polymer matrix and the particles remained their average size (20 - 150 nm) before incorporation into the polymer matrix.
Keywords: Zinc Oxide nanoparticle, Montmorillonite, FTIR, Antibacterial activity