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The aim of this paper was to determine the particle size composition of wood dust emission from CNC milling of natural wood and medium-density fiberboard (MDF) and evaluate the associated occupational exposure risks. The paper is focused on some of the most commonly used materials in the woodworking and furniture industry, i.e., solid wood (beech, oak, and spruce) and composite materials (MDF panels). In addition to the influence of the machined material, the effect of the technical-technological parameters, namely, feed speed and depth of cut on the particle size distribution, was also investigated. The selected values of the technical-technological parameters used in this study followed the common work practice in small wood processing companies. The particle size distribution was evaluated by using sieve analysis of samples from the total mass of collected wood dust. The results demonstrated that machining of natural wood is characterized mostly by the formation of coarse dust fractions (2 mm–1 mm sieves), whilst the processing of MDF was associated with generation of fine dust fractions with a size below 100 μm. The results obtained can be used for optimizing the technological programs of CNC milling machines, thus, reducing the occupational exposure to harmful wood dust emissions in the wood-processing industry.
Richard Kminiak; Martin Kučerka; Lubos Kristak; Roman Reh; Petar Antov; Alena Očkajová; Tomasz Rogoziński; Marta Pędzik. Granulometric Characterization of Wood Dust Emission from CNC Machining of Natural Wood and Medium Density Fiberboard. Forests 2021, 12, 1039 .
AMA StyleRichard Kminiak, Martin Kučerka, Lubos Kristak, Roman Reh, Petar Antov, Alena Očkajová, Tomasz Rogoziński, Marta Pędzik. Granulometric Characterization of Wood Dust Emission from CNC Machining of Natural Wood and Medium Density Fiberboard. Forests. 2021; 12 (8):1039.
Chicago/Turabian StyleRichard Kminiak; Martin Kučerka; Lubos Kristak; Roman Reh; Petar Antov; Alena Očkajová; Tomasz Rogoziński; Marta Pędzik. 2021. "Granulometric Characterization of Wood Dust Emission from CNC Machining of Natural Wood and Medium Density Fiberboard." Forests 12, no. 8: 1039.
Wood dust generated during woodworking—particularly from hardwood species during sanding—poses a health and safety hazard to workers in the wood industry. This study aimed to determine the particle-size distribution of selected hardwood species and the content of fine particles in dust created during machine sanding, which pose the highest health and safety hazards in the woodworking industry. Six hardwood species were studied: black alder, European ash, common walnut, pedunculate oak, hornbeam, and European beech. The sieve analysis method was used to determine the particle-size distribution and article mean arithmetic particle diameter, and laser diffraction analysis was used to determine the finest particle content. Two size ranges were assumed: <2.5 μm and <10 μm. Beech dust had the smallest mean particle diameter. Dust from wood species used in the test had similar contents of fine fractions of particles. The average content of particles smaller than 2.5 µm in wood dust from the tested hardwood species did not exceed 1.9%. In terms of occupational exposure to wood dust, machine sanding conditions of hardwoods should be properly adjusted to limit the formation of large amounts of dust.
Marta Pędzik; Tomasz Rogoziński; Jerzy Majka; Kinga Stuper-Szablewska; Petar Antov; Lubos Kristak; Richard Kminiak; Martin Kučerka. Fine Dust Creation during Hardwood Machine Sanding. Applied Sciences 2021, 11, 6602 .
AMA StyleMarta Pędzik, Tomasz Rogoziński, Jerzy Majka, Kinga Stuper-Szablewska, Petar Antov, Lubos Kristak, Richard Kminiak, Martin Kučerka. Fine Dust Creation during Hardwood Machine Sanding. Applied Sciences. 2021; 11 (14):6602.
Chicago/Turabian StyleMarta Pędzik; Tomasz Rogoziński; Jerzy Majka; Kinga Stuper-Szablewska; Petar Antov; Lubos Kristak; Richard Kminiak; Martin Kučerka. 2021. "Fine Dust Creation during Hardwood Machine Sanding." Applied Sciences 11, no. 14: 6602.
Material losses are caused by the machining process and the manufacturing process, as well as the use of excessive dimensional allowances applied to the machined materials. An adequate reduction of the planned machining allowances for wood-based panel components is possible when the machining line is properly designed and equipped with high-precision machines and devices. The aim of the study was to determine the size of material savings in relation to the most important construction materials when implementing an innovative technological line for processing industrial doors made of wood materials. The achieved savings improve the competitiveness of the door manufacturer on the market. In order to calculate the material savings obtained in the production of the most important models of door leaves that can be obtained in machining on the TechnoPORTA line, numerical data were compiled specifying the dimensions of semi-finished products, taking into account machining allowances applied before and after reduction. The implementation of the TechnoPORTA line makes it possible to reduce the negative impact on the environment by reducing the consumption of wood. It reduces the consumption of materials and the operating costs associated with the reduction of labor intensity, the load on machines and devices, and inventory levels.
Zdzisław Kwidziński; Joanna Bednarz; Marta Pędzik; Łukasz Sankiewicz; Piotr Szarowski; Bartłomiej Knitowski; Tomasz Rogoziński. Innovative Line for Door Production TechnoPORTA—Technological and Economic Aspects of Application of Wood-Based Materials. Applied Sciences 2021, 11, 4502 .
AMA StyleZdzisław Kwidziński, Joanna Bednarz, Marta Pędzik, Łukasz Sankiewicz, Piotr Szarowski, Bartłomiej Knitowski, Tomasz Rogoziński. Innovative Line for Door Production TechnoPORTA—Technological and Economic Aspects of Application of Wood-Based Materials. Applied Sciences. 2021; 11 (10):4502.
Chicago/Turabian StyleZdzisław Kwidziński; Joanna Bednarz; Marta Pędzik; Łukasz Sankiewicz; Piotr Szarowski; Bartłomiej Knitowski; Tomasz Rogoziński. 2021. "Innovative Line for Door Production TechnoPORTA—Technological and Economic Aspects of Application of Wood-Based Materials." Applied Sciences 11, no. 10: 4502.
We hypothesized that the type of wood, in combination with the grit size of sandpapers, would affect sanding efficiency. Fixed factors were used in the experiment (a belt sander with pressure p = 3828 Pa, and a belt speed of v s = 14.5 m/s) as well as variable factors (three sand belts (P60, P120, P180), six hardwood species (beech, oak, ash, hornbeam, alder, walnut) and three softwood species (pine, spruce, larch)). The masses of the test samples were measured until they were completely sanded. The sanding efficiency of hardwood species is less variable than for softwood species. Maximum sanding efficiency for the softwood ranged from 1 to 2 min, while for the hardwood species, it ranged from 2 to 4.5 min at the start of sanding and then decreased. The average time for complete sanding of the softwood samples was: 87 s (P60), 150 s (P120), and 188 s (P180). For hardwood, these times were 2.4, 1.5, and 1.8 times longer. The results indicate that the factors determining sanding efficiency are the type of wood, and, secondly, the grit size of sanding belts. In the first phase of blunting with the sanding belts, the sanding processes of hardwood and softwood are significantly different. In the second phase of blunting, sanding belts with higher grit numbers (P120 and P180) behaved similarly while sanding hardwood and softwood.
Maciej Sydor; Radosław Mirski; Kinga Stuper-Szablewska; Tomasz Rogoziński. Efficiency of Machine Sanding of Wood. Applied Sciences 2021, 11, 2860 .
AMA StyleMaciej Sydor, Radosław Mirski, Kinga Stuper-Szablewska, Tomasz Rogoziński. Efficiency of Machine Sanding of Wood. Applied Sciences. 2021; 11 (6):2860.
Chicago/Turabian StyleMaciej Sydor; Radosław Mirski; Kinga Stuper-Szablewska; Tomasz Rogoziński. 2021. "Efficiency of Machine Sanding of Wood." Applied Sciences 11, no. 6: 2860.
The measurement of cutting forces permits building of physic-mechanical cutting models for a better understanding of the phenomena observed during cutting. It also permits the design and optimization of processes, machines, tools, and wood preparation. Optimization of cutting conditions of wood-based materials can decrease the cutting forces, which directly relates to the energy consumption and surface quality. The sawdust analysis may serve for analysis of cutting kinematics and occupational health risk. The aim of the study was to estimate the correlation between the feed rate and both feed force and sawdust particle size produced during particleboard circular sawing. A saw machine type K700 was used in experiments. There were three feed rates of 12, 18, and 24 m/min executed by a horizontal pneumatic actuator fixed to the sliding side table of the saw machine. Based on the results of the experiments, a positive correlation was observed between the feed rate in a circular sawing process and feed forces and an unexpected particle size distribution depending on the feed rate.
Bartosz Pałubicki; Luďka Hlásková; Stephan Frömel-Frybort; Tomasz Rogoziński. Feed Force and Sawdust Geometry in Particleboard Sawing. Materials 2021, 14, 945 .
AMA StyleBartosz Pałubicki, Luďka Hlásková, Stephan Frömel-Frybort, Tomasz Rogoziński. Feed Force and Sawdust Geometry in Particleboard Sawing. Materials. 2021; 14 (4):945.
Chicago/Turabian StyleBartosz Pałubicki; Luďka Hlásková; Stephan Frömel-Frybort; Tomasz Rogoziński. 2021. "Feed Force and Sawdust Geometry in Particleboard Sawing." Materials 14, no. 4: 945.
Wood dust poses a threat to the health of employees and the risk of explosion and fire, accelerates the wear of machines, worsens the quality of processing, and requires large financial outlays for its removal. The aim of this study was to investigate the extent to which the grit size of sandpaper influences the size of the wood dust particles and the proportion of the finest particles which, when dispersed in the air, may constitute the respirable fraction. Six species of hardwood (beech, oak, ash, hornbeam, alder, and walnut), and three species of softwood (larch, pine, and spruce) were used in the research. While sanding the samples under the established laboratory conditions, the following were measured for two types of sandpapers (grit sizes P60 and P180): mean arithmetic particle size of dust and finest dust particles content (<10 µm). Based on the obtained results, we found that the largest dust particle sizes were obtained for alder, pine, and spruce; the smallest size of dust particles during sanding with both sandpapers was obtained for beech, hornbeam, oak, ash, larch, and walnut. The mean arithmetic particle sizes ranged from 327.98 µm for pine to 104.23 µm for hornbeam. The mean particle size of the dust obtained with P60 granulation paper was 1.4 times larger than that of the dust obtained with P180 granulation sandpaper. The content of the finest dust particles ranged from 0.21% for pine (P60 sandpaper) to 12.58% for beech (P180 sandpaper).The type of wood (hardwood or softwood) has a significant influence on the particle size and the content of the finest dust fraction.
Marta Pędzik; Kinga Stuper-Szablewska; Maciej Sydor; Tomasz Rogoziński. Influence of Grit Size and Wood Species on the Granularity of Dust Particles During Sanding. Applied Sciences 2020, 10, 8165 .
AMA StyleMarta Pędzik, Kinga Stuper-Szablewska, Maciej Sydor, Tomasz Rogoziński. Influence of Grit Size and Wood Species on the Granularity of Dust Particles During Sanding. Applied Sciences. 2020; 10 (22):8165.
Chicago/Turabian StyleMarta Pędzik; Kinga Stuper-Szablewska; Maciej Sydor; Tomasz Rogoziński. 2020. "Influence of Grit Size and Wood Species on the Granularity of Dust Particles During Sanding." Applied Sciences 10, no. 22: 8165.
The experimental results of the study focused on the effect of drying processes of modified air drying and warm air-steam mixture drying of pine and beech wood on the size of sawdust particles created in cutting using PRW-15M sash gang saw, are presented in the paper. Particle size analysis of dry sawdust was performed using two methods—sieving method and laser diffraction analysis. The results showed that the drying process did not affect the general particle size distribution of the sawdust, but the content of very fine dust particles in beech wood sawdust is many times higher when the beech wood was dried in the warm air-steam mixture drying process and sawn at a feed per tooth of 0.105 mm.
Tomasz Rogoziński; Daniel Chuchala; Marta Pędzik; Kazimierz A. Orlowski; Ladislav Dzurenda; Tomasz Muzinski. Influence of drying mode and feed per tooth rate on the fine dust creation in pine and beech sawing on a mini sash gang saw. European Journal of Wood and Wood Products 2020, 79, 91 -99.
AMA StyleTomasz Rogoziński, Daniel Chuchala, Marta Pędzik, Kazimierz A. Orlowski, Ladislav Dzurenda, Tomasz Muzinski. Influence of drying mode and feed per tooth rate on the fine dust creation in pine and beech sawing on a mini sash gang saw. European Journal of Wood and Wood Products. 2020; 79 (1):91-99.
Chicago/Turabian StyleTomasz Rogoziński; Daniel Chuchala; Marta Pędzik; Kazimierz A. Orlowski; Ladislav Dzurenda; Tomasz Muzinski. 2020. "Influence of drying mode and feed per tooth rate on the fine dust creation in pine and beech sawing on a mini sash gang saw." European Journal of Wood and Wood Products 79, no. 1: 91-99.
Plants produce specific structures constituting barriers, hindering the penetration of pathogens, while they also produce substances inhibiting pathogen growth. These compounds are secondary metabolites, such as phenolics, terpenoids, sesquiterpenoids, resins, tannins and alkaloids. Bioactive compounds are secondary metabolites from trees and shrubs and are used in medicine, herbal medicine and cosmetology. To date, fruits and flowers of exotic trees and shrubs have been primarily used as sources of bioactive compounds. In turn, the search for new sources of bioactive compounds is currently focused on native plant species due to their availability. The application of such raw materials needs to be based on knowledge of their chemical composition, particularly health-promoting or therapeutic compounds. Research conducted to date on European trees and shrubs has been scarce. This paper presents the results of literature studies conducted to systematise the knowledge on phenolic compounds found in trees and shrubs native to central Europe. The aim of this review is to provide available information on the subject and to indicate gaps in the present knowledge.
Lidia Szwajkowska-Michałek; Anna Przybylska-Balcerek; Tomasz Rogoziński; Kinga Stuper-Szablewska. Phenolic Compounds in Trees and Shrubs of Central Europe. Applied Sciences 2020, 10, 6907 .
AMA StyleLidia Szwajkowska-Michałek, Anna Przybylska-Balcerek, Tomasz Rogoziński, Kinga Stuper-Szablewska. Phenolic Compounds in Trees and Shrubs of Central Europe. Applied Sciences. 2020; 10 (19):6907.
Chicago/Turabian StyleLidia Szwajkowska-Michałek; Anna Przybylska-Balcerek; Tomasz Rogoziński; Kinga Stuper-Szablewska. 2020. "Phenolic Compounds in Trees and Shrubs of Central Europe." Applied Sciences 10, no. 19: 6907.
The specific beech wood dust resistance coefficient values were experimentally determined in the condition of pulse-jet filtration using a pilot-scale baghouse. The experiments were carried out for two variants of the filter medium. One of them had a PTFE (Polytetrafluoroethylene) membrane on the working surface. Three values of filtration velocity and seven levels of dust concentration at the filter inlet were used to determine the variability of the specific resistance coefficient of beech wood dust accumulated on the filter medium. The values of the specific beech wood dust resistance coefficient depend on filter medium finishing and filtration parameters: filtration velocity and dust concentration at the filter inlet. The high concentration of dust at the filter inlet and low filtration velocity should be used, especially in filters with surface finished media, for the reduction in pressure drop, which would affect in a significant reduction of energy consumption.
Zbigniew Potok; Tomasz Rogoziński. Pilot-Scale Study on the Specific Resistance of Beech Wood Dust in a Pulse-Jet Filter. Sustainability 2020, 12, 1 .
AMA StyleZbigniew Potok, Tomasz Rogoziński. Pilot-Scale Study on the Specific Resistance of Beech Wood Dust in a Pulse-Jet Filter. Sustainability. 2020; 12 (12):1.
Chicago/Turabian StyleZbigniew Potok; Tomasz Rogoziński. 2020. "Pilot-Scale Study on the Specific Resistance of Beech Wood Dust in a Pulse-Jet Filter." Sustainability 12, no. 12: 1.
Air pollution by wood dust in furniture production sites is an important hygiene issue. The dust is created by all types of wood and wood-based material machining, and its concentration in the working zone surrounding the machining stand depends on the effectiveness of the dust exhaust system. In present research, three setups of the dust extraction system for a conventional table sawing machine are considered while machining particleboards. The results showed a high impact of the exhaust system connection setup on the dust concentration in the air surrounding the sawing machine work stand. The use of both main and auxiliary sawdust extraction connectors together ensured the highest clearness of the air, with only 0.5 mg/m3 of dust concentration. Closing the upper hood leads to a concentration five times higher, while disconnecting it results in a ten times higher dust content. The finest dust particles (
Bartosz Pałubicki; Luďka Hlásková; Tomasz Rogoziński. Influence of Exhaust System Setup on Working Zone Pollution by Dust during Sawing of Particleboards. International Journal of Environmental Research and Public Health 2020, 17, 3626 .
AMA StyleBartosz Pałubicki, Luďka Hlásková, Tomasz Rogoziński. Influence of Exhaust System Setup on Working Zone Pollution by Dust during Sawing of Particleboards. International Journal of Environmental Research and Public Health. 2020; 17 (10):3626.
Chicago/Turabian StyleBartosz Pałubicki; Luďka Hlásková; Tomasz Rogoziński. 2020. "Influence of Exhaust System Setup on Working Zone Pollution by Dust during Sawing of Particleboards." International Journal of Environmental Research and Public Health 17, no. 10: 3626.
The paper concerns the importance of the trend of mass customization in building the competitive advantage of companies in the door joinery sector in Poland. Its purpose is an attempt at assessing the effects of mass customization carried out on a newly designed TechnoPORTA technological line for automated door production on the basis of an analysis of selected technical and economic indexes related to manufacturing costs. The basis for the calculation of these indexes was the value of material and labor costs and the projected production value in relation to eleven selected types of industrial doors. Based on the analysis of technical and economic indexes, it can be concluded that the introduction of the concept of mass customization will reduce gross costs of manufactured products which, with the assumed level of sales, will translate into annual profit. The results obtained allow for optimistic conclusions about the possibility of building the long-term competitive advantage of door manufacturers.
Marta Pędzik; Joanna Bednarz; Zdzisław Kwidziński; Tomasz Rogoziński; Jerzy Smardzewski. The Idea of Mass Customization in the Door Industry Using the Example of the Company Porta KMI Poland. Sustainability 2020, 12, 3788 .
AMA StyleMarta Pędzik, Joanna Bednarz, Zdzisław Kwidziński, Tomasz Rogoziński, Jerzy Smardzewski. The Idea of Mass Customization in the Door Industry Using the Example of the Company Porta KMI Poland. Sustainability. 2020; 12 (9):3788.
Chicago/Turabian StyleMarta Pędzik; Joanna Bednarz; Zdzisław Kwidziński; Tomasz Rogoziński; Jerzy Smardzewski. 2020. "The Idea of Mass Customization in the Door Industry Using the Example of the Company Porta KMI Poland." Sustainability 12, no. 9: 3788.
Dimensional accuracy of machining translates into susceptibility to defects in assembly of furniture elements. In the initial drilling phase, the tip of the drill may slip due to the properties of the workpiece, which may result in inaccurate machining. Taking this into account, it was decided to investigate this phenomenon for drilling in the side of the plywood board. Samples for testing were made of 18 mm thick, 13 layer birch-alder plywood, covered with melamine film, glued with phenol-formaldehyde glue. With the use of an industrial dowel drilling machine, 30 holes in each of three examined layer were made. All holes were made parallel to the layers – on the side of the plywood board, and their axes were located in three adjacent layers: the birch veneer layer, the adhesive layer, and the alder veneer layer. Two types of geometric accuracy of holes were analyzed: the distance between the real center of the hole and the nominal position and also the inclination of the hole axis from the nominal axis. The holes made in the adhesive layer showed approximately twice larger deviations compared with the holes made in two adjacent layers of veneer. There was no significant relationship between the deviations of the angle of holes axis and the inaccuracies in the position of their centers. Main conclusion: When drilling in the side surface of the plywood board, less accurate holes are obtained if the hole axis is located in the adhesive layer, and there is more accuracy if the hole axis is located in the veneer layer.
Maciej Sydor; Tomasz Rogoziński; Kinga Stuper-Szablewska; Karol Starczewski. The accuracy of holes drilled in the side surface of plywood. BioResources 2019, 15, 1 .
AMA StyleMaciej Sydor, Tomasz Rogoziński, Kinga Stuper-Szablewska, Karol Starczewski. The accuracy of holes drilled in the side surface of plywood. BioResources. 2019; 15 (1):1.
Chicago/Turabian StyleMaciej Sydor; Tomasz Rogoziński; Kinga Stuper-Szablewska; Karol Starczewski. 2019. "The accuracy of holes drilled in the side surface of plywood." BioResources 15, no. 1: 1.
The present paper provides characteristics of three species of grain straw particles applied in the production of lignocellulose particleboards. For the sake of the investigation, rapeseed, rye, and triticale straw were fragmented to the size of particles used in the wood-based materials industry. The aim of the research was to determine physical properties of particle of rapeseed, rye, and triticale straw and to evaluate their usefulness in the process of manufacturing lignocellulose particleboards purposed for building constructions. Another aspect of the work was to determine the influence of moisture content of straw particles (using rapeseed straw as an example) on properties of the manufactured particleboards made with its use. The conclusion is that each of the investigated materials is characterized by different geometry, poured and tapped bulk density, varied angle of repose, and slippery angle of repose. Differences in sizes and shapes of particles of various grain species and in their moisture content strongly affect properties of particleboards produced with their use. The investigations prove that the best properties are observed for rye straw particleboards. However, due to their physical parameters, difficulties in storage, transport, and particleboards production may happen to be more considerable than in case of other materials.
Dorota Dukarska; Marta Pędzik; Wiktoria Rogozińska; Tomasz Rogoziński; Rafał Czarnecki. Characteristics of straw particles of selected grain species purposed for the production of lignocellulose particleboards. Particulate Science and Technology 2019, 39, 213 -222.
AMA StyleDorota Dukarska, Marta Pędzik, Wiktoria Rogozińska, Tomasz Rogoziński, Rafał Czarnecki. Characteristics of straw particles of selected grain species purposed for the production of lignocellulose particleboards. Particulate Science and Technology. 2019; 39 (2):213-222.
Chicago/Turabian StyleDorota Dukarska; Marta Pędzik; Wiktoria Rogozińska; Tomasz Rogoziński; Rafał Czarnecki. 2019. "Characteristics of straw particles of selected grain species purposed for the production of lignocellulose particleboards." Particulate Science and Technology 39, no. 2: 213-222.
Timber cross-cutting accuracy obtained with an automatic saw. The aim of this study was to verify the accuracy of cross-cutting of Scots Pine timber with use of optimization cross-cut saw Salvador Supercut 500. An influence of nominal element length and thru-feed speed was examined and analyzed with statistical methods.
Szymon Nieciąg; Bartosz Pałubicki; Jacek Wilkowski; Tomasz Rogoziński. Timber cross-cutting accuracy obtained with an automatic saw. Annals of WULS, Forestry and Wood Technology 2019, 107, 80 -83.
AMA StyleSzymon Nieciąg, Bartosz Pałubicki, Jacek Wilkowski, Tomasz Rogoziński. Timber cross-cutting accuracy obtained with an automatic saw. Annals of WULS, Forestry and Wood Technology. 2019; 107 ():80-83.
Chicago/Turabian StyleSzymon Nieciąg; Bartosz Pałubicki; Jacek Wilkowski; Tomasz Rogoziński. 2019. "Timber cross-cutting accuracy obtained with an automatic saw." Annals of WULS, Forestry and Wood Technology 107, no. : 80-83.
The aim of the study was to determine the effect of parameters of the thermal modification process and machining on the size distribution of dust particles of Scots pine (Pinus sylvestris L.) generated during lengthwise milling. Unmodified wood and thermally modified wood at temperatures of 130, 160, 190, and 220°C were milled lengthwise at cutting depths of 0.5 and 2 mm. Particle size analysis was done using the sieving method. The content of the finest particles was measured using the laser diffraction method. The results indicate that at smaller cutting depths, more smaller particles were formed regardless of the wood modification temperature. Thermal treatment of wood does not cause significant differences in the general particle size distribution of dust. However, the content of the finest dust particles depends on the temperature of wood modification. When machined, wood thermally modified at higher temperatures results in the formation of more dust particles that may pose health risks to employees. This is particularly noticeable at a smaller cutting depth. With the increase of the temperature of the modification, the share of the finest dust particles, which are a potential threat to the health of employees, increases. To reduce dust emissions during milling of thermally modified wood, the highest possible cutting depth should be used.
Magdalena Piernik; Tomasz Rogoziński; Andrzej Krauss; Grzegorz Pinkowski. The influence of the thermal modification of pine ( Pinus sylvestris L.) wood on the creation of fine dust particles in plane milling. Journal of Occupational Health 2019, 61, 481 -488.
AMA StyleMagdalena Piernik, Tomasz Rogoziński, Andrzej Krauss, Grzegorz Pinkowski. The influence of the thermal modification of pine ( Pinus sylvestris L.) wood on the creation of fine dust particles in plane milling. Journal of Occupational Health. 2019; 61 (6):481-488.
Chicago/Turabian StyleMagdalena Piernik; Tomasz Rogoziński; Andrzej Krauss; Grzegorz Pinkowski. 2019. "The influence of the thermal modification of pine ( Pinus sylvestris L.) wood on the creation of fine dust particles in plane milling." Journal of Occupational Health 61, no. 6: 481-488.
Principles of pulse-jet filters used in the woodworking industry. The pulse-jet filters used to separate wood dust and factors influencing their operation were described in this paper. The analysis of the possibility of the use of pulse-jet filters for wood dust separation presented in this work was based on two basic quantitative criteria. These are the separation efficiency and the pressure drop in the filtration process performed in a dust collector. The influence of wood dust type, filtration velocity and air relative humidity the separation efficiency and the pressure were described.
Tomasz Rogoziński; Sergei Trofimov. Principles of pulse-jet filters used in the woodworking industry. Annals of WULS, Forestry and Wood Technology 2019, 105, 98 -101.
AMA StyleTomasz Rogoziński, Sergei Trofimov. Principles of pulse-jet filters used in the woodworking industry. Annals of WULS, Forestry and Wood Technology. 2019; 105 ():98-101.
Chicago/Turabian StyleTomasz Rogoziński; Sergei Trofimov. 2019. "Principles of pulse-jet filters used in the woodworking industry." Annals of WULS, Forestry and Wood Technology 105, no. : 98-101.
Propolis is a natural material collected by honeybees, containing bioactive compounds that exhibit biological activity. The aim of this study was to assess the chemical composition of Polish propolis extracted with two different concentrations of ethanol, namely 70% and 96%, and to evaluate their antioxidant activity depending on extraction conditions. Samples of Polish propolis were extracted with 70% and 96% ethanol in order to obtain the ethanolic propolis extracts EEP70 and EEP96, respectively. Concentrations of 10 flavonoids and 6 phenolic acids were determined using the UPLC-PDA-TQD system. The antioxidant properties were determined based on the DPPH· free radical scavenging activity, Fe3+ reducing power assay, and ferrous ions (Fe2+) chelating activity assays. Moreover, the effects of the propolis extracts on human red blood cell morphology , the selective permeability of their membrane, as well as on free radicals-induced hemolysis were also assessed. Qualitative and quantitative analyses of both propolis extracts indicated that 70% ethanolic extract contained higher amounts of phenolic compounds than 96% ethanolic extract. The levels of antioxidant activity indicated that both Polish propolis extracts exhibited a high and comparable antioxidant power. The concentration of ethanol used for extraction had no effect on the antioxidant potential of propolis. The presented results indicate that the extracts of Polish propolis are rich in phenolic compounds and are very effective as antioxidant agents. Therefore, they may be applied as a constituent of products used in phytotherapy regardless of the concentration of ethanol used in propolis extraction.
Magdalena Woźniak; Lucyna Mrówczyńska; Agnieszka Waśkiewicz; Tomasz Rogoziński; Izabela Ratajczak. Phenolic Profile and Antioxidant Activity of Propolis Extracts From Poland. Natural Product Communications 2019, 14, 1 .
AMA StyleMagdalena Woźniak, Lucyna Mrówczyńska, Agnieszka Waśkiewicz, Tomasz Rogoziński, Izabela Ratajczak. Phenolic Profile and Antioxidant Activity of Propolis Extracts From Poland. Natural Product Communications. 2019; 14 (5):1.
Chicago/Turabian StyleMagdalena Woźniak; Lucyna Mrówczyńska; Agnieszka Waśkiewicz; Tomasz Rogoziński; Izabela Ratajczak. 2019. "Phenolic Profile and Antioxidant Activity of Propolis Extracts From Poland." Natural Product Communications 14, no. 5: 1.
Propolis extracts possess beneficial biological effects, such as antioxidant activity. However, the composition of propolis and biological properties of its extracts depend on many factor, including time of harvesting. The main purpose of this study was to evaluate the seasonal effect on the phenolic profile of Polish propolis extracts and their antioxidant activity. Propolis samples were collected from the same apiary during three seasons of the year. The chemical composition (contents of phenolic acids and flavonoids) of ethanolic propolis extracts was determined by ultra-performance liquid chromatography equipped with a photodiode detector and a triple quadrupole mass spectrometer. The antioxidant potential of propolis extracts was evaluated. Additionally, in vitro effects of propolis extracts on the morphology of human red blood cells and the selective permeability of their membrane were determined. The capacity of propolis extracts to protect human red blood cells against free radical-induced hemolysis was also studied. The analyze of the chemical composition of propolis extracts collected in three season of the year indicated that the sum of determined flavonoids and phenolic acids was the highest in the sample harvested in the spring (125.14 mg/g) and it was the lowest in the extract of material collected in the fall (110.09 mg/g), but the differences were slightly. The concentration of examined phenols in propolis samples collected in different seasons was similar and only content of seven among fifteen determined compound was significantly different in extracts according to statistical analysis. The propolis extracts possess high antioxidant potential and significantly protect human red blood cells from oxidative damage. There was no significant differences with regard to the seasonal effect on the chemical profile and antioxidant potential of Polish propolis extracts. These results indicate that the time of Polish propolis harvesting have no influence on phenolic profile and antioxidant activity of its extract.
Magdalena Woźniak; Lucyna Mrówczyńska; Agnieszka Waśkiewicz; Tomasz Rogoziński; Izabela Ratajczak. The role of seasonality on the chemical composition, antioxidant activity and cytotoxicity of Polish propolis in human erythrocytes. Revista Brasileira de Farmacognosia 2019, 29, 301 -308.
AMA StyleMagdalena Woźniak, Lucyna Mrówczyńska, Agnieszka Waśkiewicz, Tomasz Rogoziński, Izabela Ratajczak. The role of seasonality on the chemical composition, antioxidant activity and cytotoxicity of Polish propolis in human erythrocytes. Revista Brasileira de Farmacognosia. 2019; 29 (3):301-308.
Chicago/Turabian StyleMagdalena Woźniak; Lucyna Mrówczyńska; Agnieszka Waśkiewicz; Tomasz Rogoziński; Izabela Ratajczak. 2019. "The role of seasonality on the chemical composition, antioxidant activity and cytotoxicity of Polish propolis in human erythrocytes." Revista Brasileira de Farmacognosia 29, no. 3: 301-308.
Beech wood dust as obtained during abrasive belt sanding along the grain was the focus of the study. Three fractions of the dust distinctly different in particle size were analyzed. Adsorption and desorption experiments were performed with dynamic vapor sorption (DVS) apparatus. The obtained sorption isotherms were parameterized with the GAB model. The equilibrium moisture content of dust increased with decreasing particle size. A significant influence of particle size on the reduction of sorption in the monolayer was found. The monolayer capacity at 25 °C was ca. 0.05 kg/kg and 0.09 kg/kg for adsorption and desorption, respectively. The multilayer sorption was practically independent of temperature and particle fraction. The influence of moisture content, particle size, temperature and sorption mode on water diffusivity was determined. The highest values of water diffusivity were observed for the lowest moisture content values corresponding to the monolayer sorption. The fastest diffusion was found for wood dust moisture content corresponding to gas relative humidity up to ca. 30%. The diffusivity also increased with the diameter of dust particles. The influence of temperature on diffusivity was more distinct for the smallest particles.
Jerzy Majka; Tomasz Rogoziński; Wiesław Olek. Water sorption and diffusion properties of beech wood dust. Powder Technology 2019, 346, 109 -115.
AMA StyleJerzy Majka, Tomasz Rogoziński, Wiesław Olek. Water sorption and diffusion properties of beech wood dust. Powder Technology. 2019; 346 ():109-115.
Chicago/Turabian StyleJerzy Majka; Tomasz Rogoziński; Wiesław Olek. 2019. "Water sorption and diffusion properties of beech wood dust." Powder Technology 346, no. : 109-115.
Experimental filtration processes were carried out to investigate the air flow resistance during separation of three types of wood dusts in a pilot-scale pulse-jet filter. Three types of dust were compared: dust from sanding pine wood, dust from sanding beech wood and dust from working particl,eboard. These dusts are characterized by different particle-size distribution. The resistance coefficient K1 was determined for the filter fabric used in tests. Basing on the results of pressure drop across the filter measured during the experimental processes in condition of three levels of filtration velocity Vf (0.0405; 0.0484 and 0.0583 m⋅s-1) the specific dust cake resistance coefficient K2 was calculated. It value depends on the dust type and filtration velocity used. The lowest K2 (20085 s-1) has pine wood dust at filtration velocity 0.0484 m⋅s-1. While the highest value (28925 s-1) was calculated at Vf = 0.0583 m⋅s-1 for dust from working of particleboards.
Tomasz Rogoziński. Pilot-scale study on the influence of wood dust type on pressure drop during filtration in a pulse-jet baghouse. Process Safety and Environmental Protection 2018, 119, 58 -64.
AMA StyleTomasz Rogoziński. Pilot-scale study on the influence of wood dust type on pressure drop during filtration in a pulse-jet baghouse. Process Safety and Environmental Protection. 2018; 119 ():58-64.
Chicago/Turabian StyleTomasz Rogoziński. 2018. "Pilot-scale study on the influence of wood dust type on pressure drop during filtration in a pulse-jet baghouse." Process Safety and Environmental Protection 119, no. : 58-64.