scholarly journals Insecticidal Effect of Zinc Oxide and Titanium Dioxide Nanoparticles against Bactericera cockerelli Sulc. (Hemiptera: Triozidae) on Tomato Solanum lycopersicum

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1460
Author(s):  
José A. Gutiérrez-Ramírez ◽  
Rebeca Betancourt-Galindo ◽  
Luis A. Aguirre-Uribe ◽  
Ernesto Cerna-Chávez ◽  
Alberto Sandoval-Rangel ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Titanium Dioxide Nanoparticles ◽  
Block Design ◽  
Field Tests ◽  
Laboratory Research ◽  
Bactericera Cockerelli ◽  
Zno Nps ◽  
Tio2 Nps ◽  
Insecticidal Effect

The use of nanoparticles (NPs) has generated an alternative pest control. The objective was to evaluate the insecticidal effect of zinc oxide nanoparticles (ZnO NPs), titanium dioxide nanoparticles (TiO2 NPs), and their combination on Bactericera cockerelli (Hemiptera: Triozidae) second-stage nymphs under laboratory and greenhouse conditions in tomato. The laboratory research was carried out with the leaf immersion bioassay method under a complete randomized design, and in the greenhouse by direct plant spraying under a randomized block design; in both designs, a control without NPs was added. Mortality was recorded every 24 h for 4 days. Both NPs in the laboratory and greenhouse showed toxicity to B. cockerelli nymphs. Results in the laboratory showed that NPs significantly caused increased mortality of 88, 99, and 100% 96 h after treatment of ZnO NPs, TiO2 NPs, and their combinations, at 1000, 100, and 250 ppm, respectively. Direct spray of plants in the greenhouse showed low mortality with 27, 32, and 23% after 96 h of ZnO NPs, TiO2 NPs, and their combinations, at 3000, 500, and 250 ppm, respectively. These results on B. cockerelli control seem promising. Nanoparticles as insecticides are a novel strategy, however, further investigation is required in field tests to obtain suitable efficacy for use in a pest management system.

scholarly journals Kinetics Analysis and Susceptibility Coefficient of the Pathogenic Bacteria by Titanium Dioxide and Zinc Oxide Nanoparticles

2019 ◽  
Vol 10 (1) ◽  
pp. 56-64 ◽  
Author(s):  
Mahmood Alizadeh-Sani ◽  
Hamed Hamishehkar ◽  
Arezou Khezerlou ◽  
Mohammad Maleki ◽  
Maryam Azizi-Lalabadi ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Pathogenic Bacteria ◽  
Bacterial Resistance ◽  
Treatment Time ◽  
Dilution Method ◽  
Survival Ratio ◽  
Zno Nps ◽  
Tio2 Nps ◽  
Hospital Infection Control

Purpose: The increase of bacterial resistance to common antibacterial agents is one of the major problems of health care systems and hospital infection control programs. In this study, antimicrobial activity of titanium dioxide (TiO2 ) and zinc oxide (ZnO) nanoparticles (NPs) was investigated against E. coli, Salmonella enteritidis, Listeria monocytogenes, and Staphylococcus aureus pathogenic bacteria by determining sensitivity coefficient and kinetics of bacterial death. Methods: Antimicrobial tests were performed with ~106 CFU/mL of each bacterium at baseline. At first, minimum inhibitory concentration (MIC) was concluded by the dilution method and then, death kinetic and susceptibility coefficient of NPs suspensions was determined at 0 to 360 min. treatment time. Results: The results of this study revealed that, the highest susceptibility was observed for L. monocytogenes (Z=0.025 mL/μg) to TiO2 NPs, whereas the lowest susceptibility was obtained in the reaction of ZnO NPs with S. enteritidis (Z=0.0033 mL/μg). The process of bacterial death in NPs suspension was assumed to follow first-degree kinetic and the survival ratio of bacteria decreased by the increase in treatment time. An increase in the concentration of NPs was seen to enhance the bactericidal action. Conclusion: Results showed that L. monocytogenes had higher sensitivity compared to S. enteritidis. The results of this study also demonstrated that TiO2 NPs have a strong antimicrobial effect in comparison with ZnO NPs and it could be employed to aid the control of pathogenic bacteria.

scholarly journals Synthesis of Zinc Oxide, Titanium Dioxide and Magnesium Dioxide Nanoparticles and Their Prospective in Pharmaceutical and Biotechnological Applications

2021 ◽  
Vol 2 (1) ◽  
pp. 011-020
Author(s):  
Abhinav Shrivastava ◽  
Ravi Kant Singh ◽  
Pankaj Kumar Tyagi ◽  
Dilip Gore
Keyword(s):  
Zinc Oxide ◽  
Antibacterial Activity ◽  
Titanium Dioxide ◽  
Small Molecules ◽  
Safety Assessment ◽  
Biotechnological Applications ◽  
Zno Nps ◽  
Tio2 Nps ◽  
Titanium Dioxide Nanoparticle ◽  
Oxide Nanoparticle

The use of nanoparticles for the therapeutic purpose is gaining pronounced importance. In the last two decades, a number of nanomedicines received regulatory approval and several showed promises through clinical trials. In this content, it is important to synthesize nanoparticles from various sources and to check its efficiency, especially its antibacterial activity. In today’s scenario number nanomedicines are proving useful to control multidrug resistance and since the mechanism of action of nanoparticles is totally different from the small molecules like antibiotics it obviates the chances of drug resistance. In this review, we discussed three metal-based nanoparticles prepared from various reducing sources namely Zinc Oxide Nanoparticle (ZnO NPs), Titanium Dioxide Nanoparticle (TiO2 NPs) and Magnesium Dioxide Nanoparticle (MnO2 NPs). The focus also made towards the safety assessment of the several nanoparticles. In addition, the exact interaction of the nanoparticles with the bacterial cell surface and the resultant changes also been highlighted. The review put forward the sources, method, and antibacterial success of these nanoparticles so that future nanomedicines could be put forward.

scholarly journals Salt Stress Mitigation via the Foliar Application of Chitosan-Functionalized Selenium and Anatase Titanium Dioxide Nanoparticles in Stevia (Stevia rebaudiana Bertoni)

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 4090
Author(s):  
Morteza Sheikhalipour ◽  
Behrooz Esmaielpour ◽  
Gholamreza Gohari ◽  
Maryam Haghighi ◽  
Hessam Jafari ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Salt Stress ◽  
Titanium Dioxide Nanoparticles ◽  
Chitosan Nanoparticles ◽  
Stevia Rebaudiana ◽  
High Salt ◽  
Steviol Glycosides ◽  
Rebaudioside A ◽  
Tio2 Nps ◽  
Stevia Rebaudiana Bertoni

High salt levels are one of the significant and major limiting factors on crop yield and productivity. Out of the available attempts made against high salt levels, engineered nanoparticles (NPs) have been widely employed and considered as effective strategies in this regard. Of these NPs, titanium dioxide nanoparticles (TiO2 NPs) and selenium functionalized using chitosan nanoparticles (Cs–Se NPs) were applied for a quite number of plants, but their potential roles for alleviating the adverse effects of salinity on stevia remains unclear. Stevia (Stevia rebaudiana Bertoni) is one of the reputed medicinal plants due to their diterpenoid steviol glycosides (stevioside and rebaudioside A). For this reason, the current study was designed to investigate the potential of TiO2 NPs (0, 100 and 200 mg L−1) and Cs–Se NPs (0, 10 and 20 mg L−1) to alleviate salt stress (0, 50 and 100 mM NaCl) in stevia. The findings of the study revealed that salinity decreased the growth and photosynthetic traits but resulted in substantial cell damage through increasing H2O2 and MDA content, as well as electrolyte leakage (EL). However, the application of TiO2 NPs (100 mg L−1) and Cs–Se NPs (20 mg L−1) increased the growth, photosynthetic performance and activity of antioxidant enzymes, and decreased the contents of H2O2, MDA and EL under the saline conditions. In addition to the enhanced growth and physiological performance of the plant, the essential oil content was also increased with the treatments of TiO2 (100 mg L−1) and Cs–Se NPs (20 mg L−1). In addition, the tested NPs treatments increased the concentration of stevioside (in the non-saline condition and under salinity stress) and rebaudioside A (under the salinity conditions) in stevia plants. Overall, the current findings suggest that especially 100 mg L−1 TiO2 NPs and 20 mg L−1 Cs–Se could be considered as promising agents in combating high levels of salinity in the case of stevia.

Impact of titanium dioxide nanoparticles on intestinal community in the 2,4,6-Trinitrobenzenesulfonic acid (TNBS)-induced acute colitis mice and the intervention effect of vitamin E

Nanoscale ◽  
2020 ◽  
Author(s):  
Yanjun Gao ◽  
Tingyu Li ◽  
Shuming Duan ◽  
Lizhi Lv ◽  
Yuan Li ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Titanium Dioxide ◽  
Vitamin E ◽  
Titanium Dioxide Nanoparticles ◽  
Trinitrobenzenesulfonic Acid ◽  
Acute Colitis ◽  
Intervention Effect ◽  
Tio2 Nps

Titanium dioxide nanoparticles (TiO2-NPs) is widely applicated as additives in foods for its excellent whitening and brightening capability. Although the toxicity and antibacterial activity of TiO2-NPs has been extensively studied,...

Mycosynthesis of bimetallic zinc oxide and titanium dioxide nanoparticles for control of Spodoptera frugiperda

2021 ◽  
pp. 104910
Author(s):  
Jayaraman Kumaravel ◽  
Kandhasamy Lalitha ◽  
Murugan Arunthirumeni ◽  
Muthugounder Subramanian Shivakumar
Keyword(s):  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Spodoptera Frugiperda ◽  
Titanium Dioxide Nanoparticles

scholarly journals Insecticidal Effect of Zinc Oxide Nanoparticles against Spodoptera frugiperda under laboratory conditions in Chiang Mai, Thailand

2021 ◽  
Author(s):  
Sarayut Pittarate ◽  
Julius Rajula ◽  
Afroja Rahman ◽  
Perumal Vivekanandhan ◽  
Malee Thungrabeab ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Pest Management ◽  
Zno Nanoparticles ◽  
Spodoptera Frugiperda ◽  
Fall Armyworm ◽  
Adult Emergence ◽  
Zno Nps ◽  
Alternative Source ◽  
Insecticidal Effect ◽  
Significant Difference

Fall armyworm Spodoptera frugiperda (J.E. Smith, 1797) is a major pest of corn, rice, and sorghum among other crops usually controlled using synthetic or biological insecticides. Currently, the new invention of nanotechnology is taking root in the agricultural industry as an alternative source of pest management that is target-specific, safe, and efficient. This study sought to determine the efficacy of commercial Zinc Oxide (ZnO) nanoparticles (NPs) towards S. frugiperda under labora-tory conditions. ZnO NPs were diluted into different concentrations (100- 500ppm), where the baby corn used to feed the S. frugiperda larvae was dipped. The development of the insect feeding on food dipped in ZnO solution was significantly (p<0.05) affected, and the number of days that the insect took to complete its life cycle had a significant difference compared to the control. There was a significant difference in the adults’ emergence at all the concentrations of ZnO NPs compared to the control, with over 90% of the eggs successfully going through the cycle until adult emergence. Additionally, several malformations were observed throughout the lifecycle of the insect. Also, the fecundity of the females was greatly affected. The findings of this study suggest the possibility of exploitation of ZnO nanoparticles not only to eradicate S. frugiperda but to significantly reduce their population in the ecosystem through deformations, reduced fecundity, reduced oviposition, and hatchability of eggs. It will be a valuable tool in integrated pest management regimens.

scholarly journals Graphene oxide decorated with zinc oxide nanoflower, silver and titanium dioxide nanoparticles: fabrication, characterization, DNA interaction, and antibacterial activity

RSC Advances ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 3704-3714 ◽  
Author(s):  
Nagi El-Shafai ◽  
Mohamed E. El-Khouly ◽  
Maged El-Kemary ◽  
Mohamed Ramadan ◽  
Ibrahim Eldesoukey ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Antibacterial Activity ◽  
Titanium Dioxide ◽  
Graphene Oxide ◽  
Titanium Dioxide Nanoparticles ◽  
Dna Interaction

The fabrication, characterization, and antibacterial activity of novel nanocomposites based on graphene oxide (GO) nanosheets decorated with silver, titanium dioxide nanoparticles, and zinc oxide nanoflowers were examined.

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