Biological Resistance and Application Properties of Particleboards Containing Nano-Zinc Oxide

Special particleboards (PBs) proposed for kitchens, bathrooms, hospitals, and some other specific products for interiors should have a sufficient resistance against bacteria, molds, and decaying fungi. This work deals about effects of zinc oxide nanoparticles (nano-ZnO) added into melamine-urea-formaldehyde (MUF) glue in the amounts of 0, 2, 6, 12, or 24% wt. on selected biological, moisture, and strength properties of laboratory-produced one-layer PBs. The nano-ZnO-treated PBs had a higher biological resistance: (1) against the Gram-positive bacterium Staphylococcus aureus by up to ca. 70% and the Gram-negative bacterium Escherichia coli by up to 50%, since their bacterial activities at using 1.0 McFarland bacterial inoculum decreased from 0.38–0.40 by up to 0.12–0.19 × 108 CFU/ml; (2) against the molds Penicillium brevicompactum and Aspergillus niger by up to ca. 50–63%, since their growth intensities (0–4) on the top surfaces of treated PBs decreased according to a modified EN 15457 from 2.33–2.67 by up to 1.17–1.0; (3) against the brown-rot fungus Coniophora puteana by up to 85.7%, since their weight losses reduced according to a modified ENV 12038 from 17.4% by up to 2.5%. The presence of nano-ZnO in PBs uninfluenced their swelling, water absorption, and bending strength; however, it decreased their internal bond strength by up to 38.8%.

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Bioavailability of Methionine-Coated Zinc Nanoparticles as a Dietary Supplement Leads to Improved Performance and Bone Strength in Broiler Chicken Production

Animals ◽

10.3390/ani10091482 ◽

2020 ◽

Vol 10 (9) ◽

pp. 1482

Author(s):

Ashraf Alkhtib ◽

Dawn Scholey ◽

Nicholas Carter ◽

Gareth W.V. Cave ◽

Belal I. Hanafy ◽

...

Keyword(s):

Zinc Oxide ◽

Amino Acid ◽

Bone Strength ◽

Feed Intake ◽

Energy Content ◽

Nano Zno ◽

Ileal Digestibility ◽

Nano Zinc Oxide ◽

Nano Zinc ◽

Bird Weight

Recently, nanotechnology has been widely adopted in many fields. The goal of this study was to evaluate the potential for amino acid coated nano minerals as a supplement in broiler feed. Zinc was selected as a model mineral for this test and supplementation of nano zinc, both coated and uncoated was compared with organic and inorganic commercial forms of zinc. A total of 48 pens (8 birds each) were assigned to one of the following dietary treatments: Control, methionine-Zinc chelate (M-Zn), nano zinc oxide (Nano-ZnO), and methionine coated nano zinc oxide (M-Nano-ZnO). All experimental diets were formulated with the same total zinc, methionine, protein, and energy content with just the zinc source as a variable. Bird weight, feed intake and feed conversion ratios were recorded weekly, with three birds culled (sacrificed) at day 21 and day 35 for sampling measures. Ileal digestibility of zinc was determined at day 21 and day 35 using titanium dioxide as an inert marker. Blood serum, liver and spleen samples were collected at day 21 and day 35 and analysed for zinc content via inductively coupled plasma mass spectrometry (ICP-MS). Tibia strength and morphometrics were measured from both legs of three birds per pen at day 21 and day 35. The study was conducted at Nottingham Trent University Poultry Unit, UK. The novel method of producing nano minerals coated with amino acids was successfully tested with zinc and material produced to test in the feeding study. Methionine coated nano zinc oxide supplementation significantly improved bird weight gain and the increased feed intake of broilers compared to an inorganic zinc form. Ileal digestibility was also improved with this methionine-nano zinc. Moreover, this supplementation improved the tibia strength of broilers at the age of 21 days, though this was not observed at day 35. Therefore, M-Nano-ZnO could be used to supplement broilers to improve both performance and digestibility with a limited positive impact on bone strength. The results of the current study suggest that the amino acid coating of nano minerals can improve the digestibility of minerals which may have further implications for the field of mineral nutrition in animal feeds.

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Effects of in ovo injection of nano-selenium and nano-zinc oxide and high eggshell temperature during late incubation on antioxidant activity, thyroid and glucocorticoid hormones and some blood metabolites in broiler hatchlings

Acta Scientiarum Animal Sciences ◽

10.4025/actascianimsci.v42i1.46029 ◽

2020 ◽

Vol 42 ◽

pp. e46029

Author(s):

Meisam Shokraneh ◽

Ali Asghar Sadeghi ◽

Seyed Naser Mousavi ◽

Saeid Esmaeilkhanian ◽

Mohammad Chamani

Keyword(s):

Antioxidant Activity ◽

Zinc Oxide ◽

Blood Parameters ◽

Nacl Solution ◽

Negative Effects ◽

In Ovo ◽

Nano Zno ◽

Nano Zinc Oxide ◽

In Ovo Injection ◽

Nano Zinc

This experiment was conducted to evaluate the effects of in ovo injection of nano-selenium (Nano-Se) and nano-zinc oxide (Nano-ZnO) and high eggshell temperature (EST) during late incubation on blood parameters of broiler hatchlings. A total of 750 fertile eggs, were weighed and randomly distributed among 5 treatment groups on each of 5 replicate tray levels. The injection was performed on 17 d of incubation. Treatments included of: 1) Eggs not injected and incubated at normal EST (control); 2) Eggs not injected and incubated at high EST; 3) Eggs injected NaCl solution and incubated at high EST (sham); 4) Eggs injected NaCl solution containing 40 µg Nano-Se and incubated at high EST; 5) Eggs injected NaCl solution containing 500 µg Nano-ZnO and incubated at high EST. EST of 37.8ºC (normal) or 38.9ºC (high) was applied from d 19 to 21 of incubation. In ovo injection of Nano-Se and Nano-ZnO significantly increased activity of GSH-Px and SOD and total protein, but decreased the levels of corticosterone, cortisol, T4 and T3 at high EST. Injection of Nano-Se and Nano-ZnO had a significant role in alleviating the negative effects of high temperature incubation and heat stress by increased antioxidant activity and reduced oxidative stress.

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Effect of Different Particle Size of Nano-Zinc Oxide on the Surface Binding Energy in Polyimide/Zinc Oxide Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.785-786.556 ◽

2013 ◽

Vol 785-786 ◽

pp. 556-560 ◽

Cited By ~ 1

Author(s):

Jia Qi Lin ◽

Hui Lin ◽

Wen Long Yang ◽

Xiao Kang Li ◽

Ying Liu ◽

...

Keyword(s):

Particle Size ◽

Zinc Oxide ◽

Binding Energy ◽

Surface Binding ◽

Nano Zno ◽

Surface Binding Energy ◽

Nano Zinc Oxide ◽

Nano Zinc ◽

Oxide Composites ◽

The Relationship

The surface binding energy between the polyimide(PI) and zinc oxide (ZnO) have been simulated using the molecular dynamics theory.The PI / ZnO model has been established by using Forcite program package of Materials Studio software.The total atoms number about 300 million, the radius of the nano-ZnO cluster model have five groups are respectively 0.5 nm, 1 nm, 1.5 nm, 2 nm, 2.5 nm.The effect of different particle size of nano-ZnO on surface binding energy in PI / ZnO composites was investigated. The relationship between the surface binding energy of PI / ZnO composites and the nano-Zno radius, the maximum of surface binding energy were obtained. The computed results show that the intermolecular bonds between nano-ZnO and PI are mainly van der waals bonds.And the surface atomic number of nano-ZnO increases along with the increasing of nano-ZnO radius, indicating that the increasing of contact surface between the nano-ZnO and PI, which lead to the surface binding energy increases, the total energy lower and the system more stable.

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Preparation of Nano Zinc Oxide and its Application in the Photocatalytic Degradation of Ampicillin

Journal of Engineering ◽

10.31026/j.eng.2020.11.09 ◽

2020 ◽

Vol 26 (11) ◽

Author(s):

Marwa F. Abdul Jabbar

Keyword(s):

Zinc Oxide ◽

Surface Area ◽

Operating Conditions ◽

Bet Surface Area ◽

Precipitation Method ◽

Optimum Operating ◽

Nano Zno ◽

Initial Concentration ◽

Nano Zinc Oxide ◽

Nano Zinc

This study was undertaken to prepare Nano zinc oxide (ZnO) by precipitation and microemulsion methods. Scanning electron microscopy (SEM), X-ray diffraction (XRD), FTIR spectrometry, atomic force microscopy (AFM), and Brunauer Emmett Teller (BET) surface area were the techniques employed for the preparation. The particle size of prepared nano ZnO was 69.15nm and 88.49nm for precipitation and microemulsion methods, respectively, which corresponded to the BET surface area 20.028 and 16.369m2/g respectively. The activity of prepared nano ZnO as a photocatalyst was estimated by the removal of ampicillin (Amp) under visible light. This study, therefore, examined the effect of pH in the range of 5-11, initial concentration of ampicillin in the range 30-70ppm, and nano ZnO concentration in the range 0.25-0.75g/L in a time period of 5h. The optimum operating conditions were pH 11, zinc oxide 0.5g/L, ampicillin initial concentration 70ppm, and that achieved for precipitation method to obtain degradation efficiency of 86% after 5h.

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Preparation and Antibacterial Activity of Silver Doping Nano Zinc Oxide

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.597.45 ◽

2014 ◽

Vol 597 ◽

pp. 45-48

Author(s):

Qun Li ◽

Xi Hui Zhao ◽

Xiao Wen Li ◽

Li Ping Wang ◽

Qian Qian Liu ◽

...

Keyword(s):

Zinc Oxide ◽

Antibacterial Activity ◽

Nitrate Solution ◽

Precipitation Method ◽

Silver Doping ◽

Nano Zno ◽

Oxalate Dihydrate ◽

Nano Zinc Oxide ◽

Zinc Oxalate ◽

Nano Zinc

Zinc oxalate dihydrate as the precursor of anometer zinc oxide (nano-ZnO) was prepared by direct precipitation method. The zinc oxalate dihydrate was dispersed in a silver nitrate solution, and then the resulting solution was filtered and dried under 120°C. The silver doping nano-Zinc oxide (nano-SDZO) was obtained by decrepitating the zinc oxalate dihydrate cake under 500°C. The microstructure of nano-ZnO and nano-SDZO were characterized by TEM, and the chemical reaction in the heat burst process was described. The nano-ZnO particles were 50-60 nm in diameter, and the particle size of nano-SDZO in the range of 20-100 nm. Antibacterial activity of the nano-ZnO and nano-SDZO were compared. The results show that all of the ZnO samples inhibited the growth of S. aureus and E. coli, and nano-SDZO showed a relatively higher inhibition rate than other samples. Two possible mechanisms were proposed to explain the inhibition of bacteria.

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EFFECT OF IN SITU SURFACE-MODIFIED NANO–ZINC OXIDE ON THE STRUCTURE AND PROPERTIES OF CONVENTIONAL VULCANIZATION IN NATURAL RUBBER

Rubber Chemistry and Technology ◽

10.5254/rct.13.87938 ◽

2014 ◽

Vol 87 (1) ◽

pp. 21-30 ◽

Cited By ~ 2

Author(s):

Zhongbiao Man ◽

Li Deng ◽

Miao Yang ◽

Yuehui Chen ◽

Zhengjie Jin

Keyword(s):

Electron Microscopy ◽

Tensile Strength ◽

Zinc Oxide ◽

Natural Rubber ◽

Nano Zno ◽

X Ray ◽

Nano Zinc Oxide ◽

Nano Zinc ◽

Surface Modified

ABSTRACT In situ surface-modified nano–zinc oxide (ZnO) had been prepared by the sol-gel method. The microscopic structure of the ZnO particles was characterized by X-ray diffraction and transmission electron microscopy. Scanning electron microscopy with energy-dispersed X-ray spectroscopy was used to observe the dispersal of ZnO in conventional vulcanization of natural rubber (NR). Properties such as cure and tensile characteristics as well as heat-resistance oxygen aging properties were researched and compared. The vulcanized structure of vulcanizate was studied by the balance-swelling method and chemical-detecting process. Results demonstrated that the dispersal of in situ surface-modified nano-ZnO in NR vulcanizate was better than that of ordinary ZnO. Compared with the addition of 5 phr of ordinary ZnO in NR, the tensile strength and elongation of NR vulcanizate filled with 2 phr of in situ surface-modified nano-ZnO increased by 0.55% and 10.34%, respectively. Meanwhile, the retention of tensile strength and elongation of vulcanizate increased by 35.85% and 19.36%, respectively.

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Effect of Calcination on the Basic Strength of Surface Modified Nano-Zinc Oxide Characterised by FTIR and Back Titration Methods

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1107.326 ◽

2015 ◽

Vol 1107 ◽

pp. 326-332

Author(s):

Abdul Rahim Yacob ◽

Kamaluddeen Suleiman Kabo

Keyword(s):

Zinc Oxide ◽

Metal Oxides ◽

Base Catalysis ◽

Nano Zinc Oxide ◽

Back Titration ◽

And Performance ◽

Nano Zinc ◽

Surface Modified ◽

Heterogeneous Base ◽

Basic Strength

The use of metal oxides in heterogeneous base catalysis has gained a large interest due to their application in many chemical and industrial processes and is environmental friendly. Basic metal oxides are commonly used and their structures, morphology and performance can be modified by method of preparation and thermal activation. In this study, surface modified amphoteric zinc oxide was prepared via hydration-dehydration method and characterised by TGA and FTIR. The basic strength at various temperatures is characterised by FTIR and back titration analyses. The results shows that surface modified zinc oxide has the highest basic strength of 1.453mmolg-1at 400°C making it a relatively good and suitable compound for use in heterogeneous basic catalysis. This result is also supported by FTIR spectra which show possible relationship between the Lewis O2-and increasing basic strength.

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