Wood Surface Research Articles

Ultra-Thin Flexible Uniplanar Antenna Based on SSPP for B5G Radio Stripe Network

In this letter, a flexible and ultra-thin uniplanar endfire antenna employing spoof surface plasmon polariton (SSPP) is proposed. The single-metal layered groundless structure is an inherent advantage of the SSPP. At the SSPP transmission line's end, a metallic strip is added asymmetrically for wideband radiation, resulting in an observed tilting of the main lobe in the azimuthal plane. Three C-shaped directors are used to enhance the directivity. The proposed antenna is fabricated and measured over flat and curved surfaces of brick wall and wood with two different radii. The proposed antenna has a low profile of 0.0017λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> and a small volume of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$0.0058{\lambda }_0^3$</tex-math></inline-formula> , where λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> is the free-space wavelength at the center frequency of the operating bandwidth. The antenna has an impedance bandwidth of 33.7% with a peak gain of 8.5 dBi. Measurements indicate no significant degradation in the proposed antenna's performance in different scenarios. Due to features like flexibility, ultrathin profile, very low volume, tilted beam with high gain, and wideband operation, the proposed antenna is highly suitable for beyond fifth-generation (B5G) radio stripe applications.

PLATech overview -radiation-heat tailored VOC-free, bio-renewable polylactic acid polymer formulations & methods for multiple industrial adhesion applications

This paper presents an overview of research and results about tailoring crystalline and amorphous form polylactic acid (PLA) polymer resin for use as an adhesive for joining a range of substrates, production of wood-based composites plywood and particle wood-based composites, and, for potential use for elevated temperature applications as for wood structures when subject to fires. The range of substrates successfully joined (with and without bio-plasticizer) ranges from metals, woods, glasses, ceramics, stones, and bricks to synthetic fluoro-polymers. Tensile bond strength for steel-to-steel bonding ranged towards 40+ MPa; superior (over 100%) bonding strength was obtained compared with EVA and other standard adhesives for wood and metal surfaces. Three successful industrial product arenas are described: 3-ply composite plywood panels meeting water soak and shear strength industry metrics; particle boards meeting-exceeding rupture strength, elasticity, and water resistance metrics similar to those expected from urea-formaldehyde based adhesive but without VOC release limitation, PVC-free luxury flooring tiles which meet strict requirements for wear cycles, distortion-free adhesion peel strength; and, production of renewable particle boards with elastic modulus and internal bond strengths comparable with boards made with urea formaldehyde. Thermal and gamma ionizing radiation research results are discussed to tailor key adhesive-relation properties: adhesion strength, viscosity, flow rate, molecular weight, hardness, flexibility, and friability. Scoping studies on radiation-based tailoring with a cross-linking agent were found to permit up to 30% improvements in bond strength as well as for enabling application as an adhesive for elevated (100 °C+) temperature applications with ∼30–50% higher operating temperatures compared with commonly used adhesives. A discussion is included about the remaining challenges and recommendations for further research.

Effect of Commercial Black Ink on the Optical Properties of P(St-MMA-AA) Microsphere Photonic Crystal Coating on Wood Surface

The mixed emulsion of P(St-MMA-AA) colloidal microspheres doped with black substances in three commercial inks (pen ink, wood color essence, propylene pigment) was coated on the wood surface. The dried colloidal microspheres self-assembled on the wood surface to form a three-dimensional photonic crystal coating. The influence of the coating on the optical properties of the wood surface was analyzed, and the influence of the type, concentration and drying temperature of the black substance on the structural color coating was explored. When three kinds of commercial black ink were mixed with colloidal microsphere emulsion to obtain photonic crystals on the wood surface, the transmitted light and the scattered light outside the photonic band gap were absorbed by black ink, which effectively reduced the light scattering inside the crystal and significantly enhanced the depth of the photonic crystal structure color. This study utilizes both pigment color and structural color, providing an environmentally friendly and novel method for colored coating of wood surfaces.

Construction of layered double hydroxide composites derived from tungsten tailing particles for simultaneously enhancing fire protection and anti-ageing properties of intumescent fire-resistant coatings applied in wood surface

Tungsten tailing is a great deal of solid waste produced in the production process of tungsten metal, for which there is no simple and effective treatment method in the world. The success synthesis of layered double hydroxide composites (TTF-LDH) by co-precipitation method from tungsten tailing is a feasible way to solve this problem. The structure and properties of TTF-LDH were confirmed by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The obtained TTF-LDH was in combination with intumescent flame retardants (IFR) to achieve a series of intumescent fire resistance coatings. The effects of TTF-LDH on the fire protection, smoke suppression and anti-ageing performances of coatings were evaluated by fire resistance test, smoke density test, cone calorimeter test and accelerated ageing test, while the flame-retardant mechanism of TTF-LDH in coatings was revealed. The results illustrate that an appropriate amount of TTF-LDH can remarkably enhance smoke suppression and fire-resistant abilities of coatings, among which the coating containing 3 wt % TTF-LDH (IFRC-LDH3) exhibits the optimal synergistic effect, revealing a smoke density rating value of 17.3%, a total heat release of 7.0 MJ/m2 and an equilibrium backside temperature of 146.2 °C at 900 s. Meanwhile, the addition of TTF-LDH can strengthen the char formation and thermal stability abilities of the coatings, and the residual weight of IFRC-LDH3 rises to 35.7% at 800 °C, as supported by thermogravimetric (TG) analysis. The results of accelerated ageing test demonstrate that the presence of TTF-LDH can strengthen structural stability of coating, decrease migration and decomposition of IFR, thus giving the coating better integrity and durability of fire-resistant and smoke suppression properties.

Comparative investigation of chemical and structural properties of charred fir wood samples by Raman and FTIR spectroscopy as well as X-ray-micro-CT technology

Abstract Wood surface charring is a treatment method commonly employed to enhance weather protection and aesthetic appearance of building exteriors. This study aims to investigate the differences between two wood surface charring processes: the traditional Japanese method known as Yakisugi and an alternative charring technique industrially manufactured with a gas burner. The objective of the study was to assess whether a thicker layer after Yakisugi treatment has any advantages over a thinner layer after the alternative process. Vibrational spectroscopy techniques including UV resonance Raman (UVRR) and Fourier transform infrared (FTIR) spectroscopy, were utilized in conjunction with X-ray-micro-CT analysis. The findings revealed that ATR-FTIR spectroscopy detected the degradation of carbohydrates and changes in lignin within the charred surface, although both processes exhibited similar vibrational contributions. In contrast, UVRR spectroscopy provided insights into the carbonized layers, revealing spectral differences indicating variations in temperature during the charring processes. X-ray micro-CT analysis visually highlighted significant differences in the coal layers, suggesting distinct combustion profiles. Remarkably, the macrostructure of wood treated with Yakisugi remained intact despite a thicker charred layer compared to the alternative charring techniques. However, further investigations are required to assess the weather stability of the alternative charring method for a comprehensive understanding.

Xylan-tannic acid adhesive combined activated wood interface to construct ultrastrong cross-linking network bonding interface

Biomass adhesives have long been a subject of widespread concern and study due to their cost-effectiveness and minimal environmental impact. In this study, an activated wood surface with epoxy groups (AWI) was created by uniformly applying 3-glycidoxypropyltrimethoxysilane (KH560) onto poplar veneer. Then the aminated xylan-oxidized tannic acid adhesive (2AX-OTA) was prepared based on the Schiff base reaction between the quinone of oxidized tannic acid (OTA) and the amine group of aminated xylan (AX). Eventually, the high-performance bonding interface was co-built by 2AX-OTA and AWI. The dry bonding strength of 2AX-OTA-AWI plywood achieved 3.86 MPa, while the wet bonding strength was measured at 2.41 MPa and 2.15 MPa after immersion in hot (63 °C)/boiling water for 3 h. FT-IR, 13C NMR, and XPS chemical analyses demonstrated that a triple cross-linked network structure of the bonding interface was co-constructed by imine covalent chain bridges and epoxy-amine network. This triple cross-linked network structure plays a crucial role in enhancing water resistance. This study presents a novel approach to designing multi-cross-linked networks for the synthesizing of eco-friendly and high-performance bio-based adhesives.

How phosphinated hydroxyurethane groups improve chemical resistance and flame retardant properties of alkyd resins?

A novel phosphorus containing polyhydroxyurethane (PHU) oligomer (DGGDAC-MXDA-DOPO), has been synthetized and grafted onto the remaining acid groups of alkyd resins in order to obtain hybrid poly(alkyd hydroxyurethane) (PAHU) resins with flame retardant properties. PAHU resins have demonstrated better alkali resistance than pure alkyd resins without PHU oligomer. Moreover, the grafting of PHU onto alkyd resin through the formation of amide bonds has exhibited thixotropic properties. The thermal and flame retardancy properties have been investigated through differential scanning calorimeter, thermogravimetric analysis and pyrolysis-combustion flow calorimeter. The alkyd resins were applied as a coating on a wood surface and fire behavior was tested by cone calorimeter analysis. The most effective coating, by taking into account, the film properties and the flame retardant behavior contains 24 wt% of PHU (1.5 wt% P) and exhibited a 40% reduction in peak of Heat Release Rate (pHRR) compared to the resins without PHU.

Quantifying bark-stripping damages to address the relationship between external and internal wood defects

The detachment of tree bark (i.e. bark-stripping) by wild ungulate species can be observed in many European forests and it can lead to significant damages to the wood. In our study, bark-stripping of different intensity and age was recorded for 110 European beech (Fagus sylvatica L.) trees growing in the Harz Mountains, Germany. Our goal was to compare the performance of a conventional and a structure-from-motion approach to quantify the external damage and to evaluate whether bark-stripping damages on the outside may accurately reflect internal wood defects. Also, we wanted to know whether potential relationships between inner and outer damages are affected by the condition of the wound. Surprisingly, despite large difference between the two approaches (mean absolute error: 46%) the wood surface on the sawn boards (internal damage) could not be predicted more accurately using structure-from-motion, for the assessment of the external damage when compared to the conventional measurements based on damage height and damage width (rhombus formula). The internally damaged area was smaller than the externally damaged area across all wound categories. In contrast though, and most notably, the length of the stem section negatively affected by the damage was always greater inside than outside. We conclude that sophisticated measurements of the outside wound area do not allow for a better estimation of the internal wound area. Foresters may continue to rely on simple measures of damage extension on the outside of the tree to estimate internal damages. They should however consider the wound status as an additional information for a better prediction of internal damages.

Caffeine-treated wood as an innovative filler for advanced polymer composites

Polymer composites, based on the wood flour originating from an invasive black cherry (Prunus serotina Ehrh.) treated with caffeine to achieve increased bio-resistance, were obtained in this study. The caffeine-treated wood had a significant effect on the supermolecular structure of polymer matrix, resulting in a high content of polymorphic β-PP phase, as well as an increase in nucleation activity of wood surface. The caffeine treatment of wood was an effective method of achieving increased resistance of composites to selected fungi and bacteria while maintaining good mechanical strength and thermal resistance. Addition of black cherry wood to polymer matrix induced inhibition of the release of volatile organic compounds. Increased resistance to fungi and bacteria depended on formation a significant amount of the β-phase up to 35% in the composite with 30% of caffeine-treated wooden filler and a simultaneous decrease in crystallinity from 52% for pure PP to 45% for mentioned composite.

Thermochemical recovery of waste wood in a domestic wood stove: influence of the geometry of wood batch in the fireplace on pollutant emissions

In the current energy context, pallet boards represent a wood of opportunity strongly used on an individual scale as a means of heating at a low cost. However, French stoves are certified to burn only hardwood species. The main objective of this work is to study the combustion behavior of pallet boards in a commercial stove designed to burn hardwood. The novelty of this work lies in the study of the influence of the wood surface exposed to fire and the identification of the conditions that promote the production of ultrafine particles. The results of the combustion tests show that the surface exposed to the fire influences the combustion. Of the six wood dispositions tested, two stand out with gaseous and particulate emissions at similar levels of a conventional hornbeam log and a densified log. Low temperature conditions and high levels of unburned gaseous products were identified as promoters of ultrafine particles. Overall conclusion of the study is that it is possible to use pallets in a non-designed stove, provided that the user carefully manages the combustion. This opens the way to the clean and rational use of a new type of fuel in a low carbon circular economy.

Surface coated ZnO powder as flame retardant for wood: A short communication

In the present study, the ability of a coating of zinc oxide (ZnO) powder to improve the fire-safety of wood exposed to radiative heat flux was examined, focusing on the ignition time of the wood. To test ZnO's efficiency on the wood substrate, two different amounts of ZnO (0.5 and 1 g ZnO per dm2) were applied to the wood surface and exposed to radiative heat from a cone calorimeter wherein a pristine piece of wood with no ZnO treatment was taken as control. The experiments were conducted at three different irradiation levels i.e., 20, 35, and 50 kWm−2. The results showed that applying ZnO on the surface of the wood significantly increased the ignition time (TTI). For the three different heat fluxes, using 0.5 g ZnO per dm2 coating on the wood surface increased the TTI by 26–33 %. Furthermore, the application of 1 g of ZnO per dm2 generated a TTI increment of 37–40 %. All three irradiation levels showed similar trends in TTI. The micrographs taken before and after combustion showed no significant disparity in the morphology of ZnO. The agglomerated ZnO particles on the wood surface remained intact after combustion. This study demonstrates a facile method of using ZnO to delay the ignition of wood. This could potentially impart fire-safety to wooden structures/façades in wildland-urban interfaces and elsewhere by reducing flame spread.

The colour difference of transparent surface finish on hydrothermally treated beech wood in the interior

The colour difference of transparent surface finish on hydrothermally treated beech wood in the interior. The paper deals with the influence of ageing of transparent surface finish in the dark and in the light in interior conditions. The colour difference of the tested samples with surface finishes (∆E*ab) was measured after the ageing of native wood and hydrothermally modified wood in the dark and in the light. In the experiment,European beech wood was hydrothermally treated at a temperature of 135 C under saturated water vapour for 6 hours. Three different types of surface finishes (acrylic-polyurethane, polyacrylic and aldehyde resin, alkyd resin) were applied on the wood surfaces. The colour parameters of the surfaces in the system CIE L*a*b*, chroma ΔC*,and hue angle Δh were measured immediately after surface finishing and after the ageing in the dark and in the light. The samples were placed behind windows glass in the interior for 60 days. The results of the colour difference ∆E*ab showed that the colour of wood and the colour of the surface finishes was changed after ageing in the dark as well as in the light. The colour difference ∆E*ab was bigger in the light than in the dark. The colour difference was bigger on native wood than on hydrothermally modified wood.

Fungal Colonization of Weathered Radiata Pine Surfaces Protected with Inorganic Nanoparticles and Coatings

Photoactive nanoparticles are used to reduce microbial colonization and self-clean surfaces of materials such as glass and ceramics. To test whether such an approach is feasible for wood surfaces, we treated radiata pine samples with TiO2 (rutile and anatase) or ZnO nanoparticles and then coated the samples with different finishes. Coated samples and uncoated controls were exposed outdoors for six months. After exposure, fungi colonizing wood surfaces were identified using molecular techniques and microscopy, and colour changes in the wood samples were also measured. Treatment of uncoated surfaces with nanoparticles reduced the discolouration of wood during weathering but had little effect on colonization of wood by black mould fungi. In contrast, pretreatment of samples with titanium dioxide nanoparticles increased the number and diversity of fungi including basidiomycetes colonizing coated samples, whereas zinc oxide nanoparticles had the opposite effect. Zinc oxide nanoparticles, however, were less effective than rutile titanium dioxide nanoparticles at reducing the discolouration of coated samples exposed to natural weathering. We conclude that none of the photoactive nanoparticles on their own are able to reduce microbial colonization and discoloration of samples. This suggests that it may be difficult to create self-cleaning wood surfaces using photoactive nanoparticles.

Effects of Plasma Treatment on the Surface Characteristics and Bonding Performance of Pinus massoniana Wood

Rosin has a great influence on the bonding of Pinus massoniana wood, and surface modification is an important way to solve this problem. In this study, Pinus massoniana wood was treated by plasma, and the effects of plasma treatment on the bonding performance and surface characteristics were investigated. The results showed the following: (1) After plasma treatment, the contact angle of Pinus massoniana wood was significantly reduced and the surface energy was significantly increased from 28.42 × 10−7 to 74.75 × 10−7 J·cm−2, and the surface wettability was also greatly improved. (2) Plasma high-energy particles experience simultaneous physical and chemical effects on the surface of Pinus massoniana wood. The former formed a micro-etched roughness on the wood surface and led to the increase in surface dispersion force, while the latter increased the aggregation and activity of polar groups on the wood surface and the degradation of some wood components and rosin, resulting in the increase in surface polar force and the enhancement of wettability. (3) After plasma treatment, the reactivity of wood was enhanced, and the cross-linking degree with adhesive and the heat release were increased. The bonding strength of Pinus massoniana wood could be improved: dry bonding from 5.08 to 5.38 MPa, boiling-water bonding strength from 4.12 to 4.53 MPa, cold-water bonding strength from 3.84 to 4.51 MPa, and the bonding stability and reliability of glued specimens were also improved.

Development of biomass adhesives based on aminated cellulose and oxidized sucrose reinforced with epoxy functionalized wood interface

Both increasing environmental issues and the lack of fossil resources have increased the importance of wood-based natural fiber composites. Therefore, high performance, sustainable, and environmentally-friendly bio-based wood adhesives are highly desirable. We developed a new biomass adhesive based on aminated cellulose (AC) and oxidized sucrose (OS), and reinforced it with an activated wood interface to improve its bonding performance. To this end, the natural wood interface (NWI) was customized with an epoxy group to produce the epoxy-functionalized wood interface (EFWI), one end of which is tethered to the wood surface. The epoxy group at the other end reacts with the amino group of AC, resulting in hydrophobicity and forming new covalent bonds in the adhesive layer, such as -Si-O-Si-, -Si-O-C-, -C-N-C-, and -O-C-C- bonds. Characterization of the adhesive interface is realized by FTIR, 13C NMR, XPS, XRD, and SEM. Dry and wet shear strengths are also investigated by tensile shear strength measurements in China National Standards (GB/T 9846-2015). Results show that OS-AC adhesives have better dry and wet shear strengths at EFWI in comparison with those on NWI, reaching 2.52 and 1.48 MPa, respectively. Thus, the construction of a functionalized wood adhesive interface dramatically enhances the bonding strength and water resistance of biomass adhesives. This study provides new insights for developing renewable, low cost, and green bio-based wood adhesives by chemical modification of the wood interface.

EFFECTS OF PRESSING TEMPERATURE AND COMPRESSION RATIO ON DENSITY DISTRIBUTION AND HARDNESS OF SURFACE DENSIFIED POPLAR WOOD

Process parameters play an important role in wood surface densification. In this study, the poplar (Populus tomentosa Carr.) wood was heated on one side at 100℃, 150℃ and 180℃, and compressed in the radial direction with the speed of 10 mm/min. The initial thickness of the wood samples were 30 mm, 26 mm and 23 mm, and they were all compressed to 20 mm and resulting in three different compression ratios: 33.3%, 23.1% and 13.0%. When the surface densification completed, the density distribution and hardness of the densified and un-treated samples were measured and analyzed. Results show that the compressing temperature mainly decided the formation of the density distribution curve and the peak density increased with the increasing temperature; as the compression ratio increased, the peak density increased and the thickness of the densified zone broadened; the surface hardness was highly correlated with the density distribution which was affected by temperature and compression ratio, and as the peak density increased and the thickness of the densified broadened the hardness increased accordingly. Therefore, by optimizing the process parameters such as the compressing temperature and compression ratio could generate a targeted density distribution which has the desired hardness.

In situ polymerization-hydrolysis-condensation of γ-methacryloxypropyltrimethoxysilane in cell wall for improved physical properties of wood

Silane coupling agent with its special molecular structure is often used to connect organic and inorganic materials. Due to the hydrophobic nature, silane coupling agents are often applied in wood surface modification instead of cell wall. In this study, poplar wood was modified with γ-methacryloxypropyltrimethoxysilane (MPS) to improve the dimensional stability and mechanical properties of the wood through in situ polymerization and hydrolysis-condensation reactions. The SEM/EDS imaging showed that at low monomer dosage, PMPS was uniformly distributed in the wood cell walls, while parts of PMPS formed a film at the cell lumen surface when modified with high concentrations of MPS. FTIR results indicated that PMPS was grafted onto the wood fibers. The XRD of the modified wood showed that the MPS modification did not affect the crystallinity of the wood. The even-distributed polymers PMPS, together with the original hemicellulose and lignin, act as a binder between microfibrils and was proved to impede the swelling of wood more efficiently than ordinary polymer bulking. Compared with untreated wood, 5% MPS modified wood achieved an ASE value of 48.67 ± 4.65% with the WPG only 5.05 ± 0.48%. The impact strength of 30% MPS wood increased by 45.66% compared with the unmodified wood. The ability to improve both dimensional stability and high mechanical properties with PMPS provided a promising modification solution for the functional improvement of wood.

Etofenprox vs. Alphitobius diaperinus adults: Residual efficacy on glass, plastic, wood, and ceramic surfaces

This study was conducted to assess the immediate and delayed residual mortality of two doses of etofenprox (half label dose/label dose) against Alphitobius diaperinus (Panzer) (Coleoptera: Tenebrionidae) adults, for a period of six weeks. Etofenprox was applied on glass, plastic, wood, and ceramic surfaces, either in presence or absence of food. The highest immediate mortality was noted for label dose/no food on glass, reaching 77.8% mortality, the first week of the experiments. Complete mortality (100.0%) was recorded in the delayed assays on glass surfaces treated with label dose regardless of food scenario for the first and second week. All individuals were killed on treated ceramic surfaces at the label dose regardless of food scenario, while plastic surfaces suppressed the individuals at the label dose/no food scenario the first week. The highest mortalities were provided on treated glass at all bioassays, followed by ceramic, plastic and wood. Label dose caused the death to more individuals than half label dose. Also the presence of food resulted to less dead adults than the absence of food. Overall, the label dose of etofenprox without food is capable of suppressing the adult population of A. diaperinus for two weeks, treated on all tested surfaces except wood.

Effects of process‐based floodplain restoration on aquatic macroinvertebrate production and community structure

AbstractRecent stream restoration approaches, such as Stage 0 restoration, aim to restore natural processes to regain lost ecosystem functions, but project implementation can also represent a reach‐scale disturbance. Assumed outcomes of these restoration actions, like greater biological productivity, are rarely evaluated. In this study, we examined the short‐term effects of Stage 0 floodplain restoration on the secondary production of aquatic macroinvertebrate communities in the South Fork McKenzie River, Oregon, 1–2 years following project implementation. We seasonally sampled macroinvertebrates from benthic and submerged wood surfaces in the restored reach, and two unrestored reference reaches located upstream, to estimate annual secondary production. Macroinvertebrate production estimates were 3× lower on a per‐meter‐squared basis in the restored reach than in the upstream unrestored reference reaches (9764 vs. 29,636 mg DM/m2/yr). However, because there was 4.5‐times greater wetted area available in the restored reach, overall macroinvertebrate production per unit of valley length was 3.4× higher in the restored reach than in unrestored reference reaches (2744 vs. 802 kg DM/km). Additionally, the mosaic of aquatic habitats created via restoration (main‐channel, side‐channel, and wetted forest habitats) supported a diversity of macroinvertebrate assemblages both within and among reaches. Our findings suggest Stage 0 project implementation, which can include dewatering and filling incised channels, may reduce aquatic macroinvertebrate production on a per‐unit‐area basis for at least 1 or 2 years following restoration. However, this short‐term disturbance effect may be offset by channel aggradation and widening, which can provide a more wetted area for macroinvertebrate production and may support greater macroinvertebrate community diversity. Future studies are needed to examine the longer term (2–10 years) aquatic macroinvertebrate response to Stage 0 restoration, and the impacts of shifting resource availability on stream fishes.

Production tests disinfectant AKVADEZ-NUK 5

Disinfection plays a significant role in the overall complex of antiepizootic measures. In order to provide manufacturers with a high-quality and cost-effective disinfectant in production conditions and in order to determine the optimal disinfection regime, we conducted production tests of the AKVAdez- NUK 5 disinfectant at the veterinary supervision facility for the stable maintenance of cattle in the Kalacheyevsky district of the Voronezh region. During the production tests, the following concentrations of working solutions were studied: 0.1%; 0.25%; 0,5%. The solution was sprayed with a TORNADOSCO/52 foam generator. The consumption rate was determined as 0.35 l/ m2 with an exposure of 30 min. When using 0.1% concentration of the AQUAdez-NUK 5 working solution with an exposure of 30 minutes, growth was recorded in 16 out of 20 samples during the study for E. coli growth. 4 samples taken from concrete surfaces were disinfected. In samples taken from concrete surfaces to determine the growth of S. aureus, the growth of colonies of microorganisms was observed in all flushes. When using 0.25% AQUAdez-NUC 5 solution in the test, in 16 of the 20 flushes selected to determine the growth of E. coli and 14 out of 20 samples on S. aureus, we did not observe the growth of microorganisms. When treating objects of veterinary supervision with 0.5% AQUAdez-NUC 5 solution after 30 minutes of exposure, there was no growth of microorganisms in 100% of the studied samples on both E. coli and S. aureus during crops from flushes from concrete and wooden surfaces. According to the results of disinfection of the surfaces of the livestock premises with respect to E. coli and S. Aureus, the working solution AQUAdez- NUK 5 showed bactericidal activity in 0.5% concentration with a 30-minute exposure at a consumption of 0.35 l/m2