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The degradation of cellulose is an important factor influencing its mechanical, optical, physical, and chemical properties and, hence, the lifetime of paper in libraries and archival collections. Regardless of the complexity of the paper material, the main chemical pathways for its degradation are hydrolysis and oxidation. This study presents an overview of the analytical techniques employed in the evaluation of the hydrolysis and oxidation processes; these techniques include size-exclusion chromatography, Fourier-transform infrared and ultraviolet–visible spectroscopy, and X-ray diffraction. This paper aims to determine the extent to which these instrumental methods are useful for studying the aforementioned processes and for which lignin contents. It also highlights how atmospheric humidity could affect the cellulose structure in paper containing lignin. It was found that humidity causes significant changes in the cellulose chain lengths and that a high lignin content in paper could suppress some cellulose degradation pathways. This knowledge can be applied to developing strategies and selective chemical treatments preventing the consequences of paper ageing.
Edyta Małachowska; Dominika Pawcenis; Jacek Dańczak; Joanna Paczkowska; Kamila Przybysz. Paper Ageing: The Effect of Paper Chemical Composition on Hydrolysis and Oxidation. Polymers 2021, 13, 1029 .
AMA StyleEdyta Małachowska, Dominika Pawcenis, Jacek Dańczak, Joanna Paczkowska, Kamila Przybysz. Paper Ageing: The Effect of Paper Chemical Composition on Hydrolysis and Oxidation. Polymers. 2021; 13 (7):1029.
Chicago/Turabian StyleEdyta Małachowska; Dominika Pawcenis; Jacek Dańczak; Joanna Paczkowska; Kamila Przybysz. 2021. "Paper Ageing: The Effect of Paper Chemical Composition on Hydrolysis and Oxidation." Polymers 13, no. 7: 1029.
For economic reasons, increasing the use of various fibrous pulps with high lignin contents—i.e., chemothermomechanical pulp (BCTMP and CTMP), thermomechanical pulp (TMP), and semichemical pulp—is desirable. The relatively good quality and increased efficiency of these pulps make them attractive paper semi-products. In particular, they could alleviate the severe shortage of paper semi-products. Although mechanical pulp and semichemical pulp are achieving increasing quality with substantially increased wood efficiency, their production is often characterised by high consumption of electricity to defibre chips or refine high-lignin-content fibrous pulps. Technological, environmental, and economic evaluations of the manufacture and application of increased efficiency cellulose pulps that take into account potential profits from increased cellulose pulp efficiency and losses due to energy costs and degradation in the properties of the resulting paper are relevant and essential to paper mills. This article reports such an analysis. The authors have analysed the usable properties of ten cellulose pulps with various degrees of digestion and identified the optimum pulp that yields the optimum product properties, considering the yield; pulp refining time, which determines the cost of paper manufacture; and strength properties of the obtained paper.
Edyta Małachowska; Marcin Dubowik; Aneta Lipkiewicz; Kamila Przybysz; Piotr Przybysz. Analysis of Cellulose Pulp Characteristics and Processing Parameters for Efficient Paper Production. Sustainability 2020, 12, 7219 .
AMA StyleEdyta Małachowska, Marcin Dubowik, Aneta Lipkiewicz, Kamila Przybysz, Piotr Przybysz. Analysis of Cellulose Pulp Characteristics and Processing Parameters for Efficient Paper Production. Sustainability. 2020; 12 (17):7219.
Chicago/Turabian StyleEdyta Małachowska; Marcin Dubowik; Aneta Lipkiewicz; Kamila Przybysz; Piotr Przybysz. 2020. "Analysis of Cellulose Pulp Characteristics and Processing Parameters for Efficient Paper Production." Sustainability 12, no. 17: 7219.
Edyta Małachowska; Aneta Lipkiewicz; Marzena Niemczyk; Marcin Dubowik; Piotr Boruszewski; Piotr Przybysz. Influences of Fiber and Pulp Properties on Papermaking Ability of Cellulosic Pulps Produced from Alternative Fibrous Raw Materials. Journal of Natural Fibers 2019, 1 -11.
AMA StyleEdyta Małachowska, Aneta Lipkiewicz, Marzena Niemczyk, Marcin Dubowik, Piotr Boruszewski, Piotr Przybysz. Influences of Fiber and Pulp Properties on Papermaking Ability of Cellulosic Pulps Produced from Alternative Fibrous Raw Materials. Journal of Natural Fibers. 2019; ():1-11.
Chicago/Turabian StyleEdyta Małachowska; Aneta Lipkiewicz; Marzena Niemczyk; Marcin Dubowik; Piotr Boruszewski; Piotr Przybysz. 2019. "Influences of Fiber and Pulp Properties on Papermaking Ability of Cellulosic Pulps Produced from Alternative Fibrous Raw Materials." Journal of Natural Fibers , no. : 1-11.
The main objective of this work was to evaluate an impact of a support on the efficiency of nickel catalysts in the high-temperature conversion of lignocellulosic biomass to hydrogen-rich gas. The most important parameters influencing catalytic performance of the catalysts were identified. The properties of three materials (ZSM-5, ZrO2, and MCF (mesostructured cellular foam)) used as a support differing in surface acidity, surface area, pore structure, ability to interact with an active phase, and resistance to coking, have been studied. The results revealed that Ni/MCF, characterized by large pore size and pore volume, low acidity, small NiO crystallites size, and moderate interaction with the active phase, is the most efficient among studied catalysts, while an application of Ni on ZSM-5 support with high-acidity was not beneficial. The results suggest that structure of the support, in particular larger pore size and a better contact between an active phase and reaction intermediates, play an important role in the formation of gaseous products during thermal decomposition of lignocellulosic feedstock. On the other hand, high acidity of the support did not increase the formation of large amounts of hydrogen-rich gaseous products.
Jacek Grams; Robert Ryczkowski; Karolina Chałupka; Izabela Sobczak; Izabela Rzeźnicka; Kamila Przybysz. Impact of Support (MCF, ZrO2, ZSM-5) on the Efficiency of Ni Catalyst in High-Temperature Conversion of Lignocellulosic Biomass to Hydrogen-Rich Gas. Materials 2019, 12, 3792 .
AMA StyleJacek Grams, Robert Ryczkowski, Karolina Chałupka, Izabela Sobczak, Izabela Rzeźnicka, Kamila Przybysz. Impact of Support (MCF, ZrO2, ZSM-5) on the Efficiency of Ni Catalyst in High-Temperature Conversion of Lignocellulosic Biomass to Hydrogen-Rich Gas. Materials. 2019; 12 (22):3792.
Chicago/Turabian StyleJacek Grams; Robert Ryczkowski; Karolina Chałupka; Izabela Sobczak; Izabela Rzeźnicka; Kamila Przybysz. 2019. "Impact of Support (MCF, ZrO2, ZSM-5) on the Efficiency of Ni Catalyst in High-Temperature Conversion of Lignocellulosic Biomass to Hydrogen-Rich Gas." Materials 12, no. 22: 3792.
This study showed that kraft cellulosic pulps from Miscanthus giganetus JM Greef and Deuter ex Hodk. and Renvoize, sweet sorghum and 5 other fast growing grasses may be easily enzymatically converted to glucose-rich sugar feedstocks. The scientific goal of the paper was to assess and compare the potential yield of hydrolysis and verify whether these grasses may be a source of sugars for fermentation processes. Kraft pulping was used as a pretreatment method and hydrolysis of the pulps was conducted using a commercial multienzyme preparation containing cellulases and xylanases at initial substrate concentrations of 0.476, 3.88 and 7.46% w/v, and 3 different enzyme loadings. Results showed that tall wheatgrass, striped tuber oat grass, tall fescue and smooth bromegrass may be efficiently converted to sugar feedstocks for biotechnology application, but that the simple reducing sugars yield is lower than for wood, due to lower cellulose content.
Kamila Przybysz; Edyta Małachowska; Danuta Martyniak; Piotr Boruszewski; Halina Kalinowska; Piotr Przybysz; Piotr Boruszewski. Production of Sugar Feedstocks for Fermentation Processes from Selected Fast Growing Grasses. Energies 2019, 12, 3129 .
AMA StyleKamila Przybysz, Edyta Małachowska, Danuta Martyniak, Piotr Boruszewski, Halina Kalinowska, Piotr Przybysz, Piotr Boruszewski. Production of Sugar Feedstocks for Fermentation Processes from Selected Fast Growing Grasses. Energies. 2019; 12 (16):3129.
Chicago/Turabian StyleKamila Przybysz; Edyta Małachowska; Danuta Martyniak; Piotr Boruszewski; Halina Kalinowska; Piotr Przybysz; Piotr Boruszewski. 2019. "Production of Sugar Feedstocks for Fermentation Processes from Selected Fast Growing Grasses." Energies 12, no. 16: 3129.
The results of enzymatic hydrolysis of birch and beech kraft cellulosic pulps indicate that they may be promising feedstocks for fermentation processes including biofuel manufacturing. The aim of this study was to investigate whether birch and beech wood require the same degree of delignification by kraft pulping as pine wood. The differences observed in the efficiency of hydrolysis for the raw materials tested suggest that the differences in the anatomical structure of the examined wood in relation to pine wood is essential for the efficiency of the enzymatic hydrolysis process. The yields of glucose and other reducing sugars obtained from the birch and beech cellulosic pulps were similar (up to around 75% and 98.3% dry weight, and 76% and 98.6% dry weight, respectively). The highest glucose yields from cellulose contained in the birch and beech pulp were around 81.2% (at a Kappa number of 28.3) and 83.1% (at a Kappa number of 30.4), respectively. The maximum glucose yields and total reducing sugars of birch wood on a dry weight basis (39.8% and 52.1%, respectively) were derived from the pulp at a Kappa number of 28.3, while the highest yields of glucose and total reducing sugars of beech wood on a dry weight basis (around 36.9% and 48.2%, respectively) were reached from the pulp at a Kappa number of 25.3. To obtain the highest glucose yields and total reducing sugars of a wood on a dry weight basis, total lignin elimination from the birch and beech pulps was not necessary. However more in-depth delignification of birch and beech wood is required than for pine wood.
Kamila Przybysz Buzała; Halina Kalinowska; Edyta Małachowska; Piotr Boruszewski; Krzysztof Krajewski; Piotr Przybysz; Piotr Boruszewski. The Effect of Lignin Content in Birch and Beech Kraft Cellulosic Pulps on Simple Sugar Yields from the Enzymatic Hydrolysis of Cellulose. Energies 2019, 12, 2952 .
AMA StyleKamila Przybysz Buzała, Halina Kalinowska, Edyta Małachowska, Piotr Boruszewski, Krzysztof Krajewski, Piotr Przybysz, Piotr Boruszewski. The Effect of Lignin Content in Birch and Beech Kraft Cellulosic Pulps on Simple Sugar Yields from the Enzymatic Hydrolysis of Cellulose. Energies. 2019; 12 (15):2952.
Chicago/Turabian StyleKamila Przybysz Buzała; Halina Kalinowska; Edyta Małachowska; Piotr Boruszewski; Krzysztof Krajewski; Piotr Przybysz; Piotr Boruszewski. 2019. "The Effect of Lignin Content in Birch and Beech Kraft Cellulosic Pulps on Simple Sugar Yields from the Enzymatic Hydrolysis of Cellulose." Energies 12, no. 15: 2952.
Research Highlights: This research provides a firm basis for understanding the improved aspen hybrid performance that aims at facilitating optimal clone selection for industrial application. Background and Objectives: Rapid growth and wood properties make aspen (Populus tremula L.) suitable for the production of pulp and paper. We assessed the potential of tree improvement through hybridization to enhance aspen productivity in northern Poland, and investigated the effects of Populus tremula hybridization with Populus tremuloides Michaux and Populus alba L. on the growth and cellulosic pulp properties for papermaking purposes. Materials and Methods: A common garden trial was utilized that included 15 hybrid aspen clones of P. tremula × P. tremuloides, four of P. tremula × P. alba, and one, previously tested P. tremula clone. Clones of P. tremula, plus trees from wild populations, were used as a reference. Tree height and diameter at breast height (DBH) were measured after growing seasons four through seven. At seven years of age, the three clones representing all species combinations were harvested, and their cellulosic pulp properties and paper sheet characteristics were assessed. Results: The clones from wild populations exhibited the poorest growth. In contrast, the clone ‘Wä 13′ (P. tremula × P. tremuloides) demonstrated the highest DBH, height, volume production, and mean annual increment (MAI) (25.4 m3 ha−1 year−1). The MAI ratio calculated for interspecific crosses ranged from 1.35- to 1.42-fold, higher than that for the P. tremula. Chemical properties of pulp, fiber morphology, and the physical properties of paper sheets were more desirable for interspecific hybrid clones than those for the pure P. tremula clone. Conclusions: The results indicated that plantations of hybrid aspen may constitute an important additional source of wood for pulp and paper products in Poland. Our findings further suggested that the standard rotation of these trees may be reduced from 40 to 20 years, increasing overall biomass yield and enhancing atmospheric carbon sequestration.
Marzena Niemczyk; Piotr Przybysz; Kamila Przybysz; Marek Karwański; Adam Kaliszewski; Tomasz Wojda; Mirko Liesebach. Productivity, Growth Patterns, and Cellulosic Pulp Properties of Hybrid Aspen Clones. Forests 2019, 10, 450 .
AMA StyleMarzena Niemczyk, Piotr Przybysz, Kamila Przybysz, Marek Karwański, Adam Kaliszewski, Tomasz Wojda, Mirko Liesebach. Productivity, Growth Patterns, and Cellulosic Pulp Properties of Hybrid Aspen Clones. Forests. 2019; 10 (5):450.
Chicago/Turabian StyleMarzena Niemczyk; Piotr Przybysz; Kamila Przybysz; Marek Karwański; Adam Kaliszewski; Tomasz Wojda; Mirko Liesebach. 2019. "Productivity, Growth Patterns, and Cellulosic Pulp Properties of Hybrid Aspen Clones." Forests 10, no. 5: 450.
The study is devoted to manufacturing and characterising a new paper material with antimicrobial properties, as an alternative to paper containing silver nanoparticles (NPs) which are claimed to be harmful to the ecosphere. In place of silver NPs, the new material contains faujasite mineral (from the faujasite group) exchanged with silver cations which are firmly attached to the material’s lattice. The material was obtained by typical ion exchange and additional elution with EDTA salt to dispose of the remaining silver oxide NPs. Thus, modified faujasite was then added to paper pulp. The new, modified paper showed better quality in terms of acidity, tensile strength and cellulose degree of polymerisation compared to paper containing Ag NPs. The visual quality of the paper is also better than that containing Ag NPs. The new material shows high potential for use in food and pharmaceutics packaging.
Roman J. Jędrzejczyk; Katarzyna Turnau; Damian K. Chlebda; Dominika Pawcenis; Przemysław J. Jodłowski; Piotr Przybysz; Tomasz Łojewski; Maciej Sitarz; Joanna Łojewska. Paper material containing Ag cations immobilised in faujasite: synthesis, characterisation and antibacterial effects. Cellulose 2017, 25, 1353 -1364.
AMA StyleRoman J. Jędrzejczyk, Katarzyna Turnau, Damian K. Chlebda, Dominika Pawcenis, Przemysław J. Jodłowski, Piotr Przybysz, Tomasz Łojewski, Maciej Sitarz, Joanna Łojewska. Paper material containing Ag cations immobilised in faujasite: synthesis, characterisation and antibacterial effects. Cellulose. 2017; 25 (2):1353-1364.
Chicago/Turabian StyleRoman J. Jędrzejczyk; Katarzyna Turnau; Damian K. Chlebda; Dominika Pawcenis; Przemysław J. Jodłowski; Piotr Przybysz; Tomasz Łojewski; Maciej Sitarz; Joanna Łojewska. 2017. "Paper material containing Ag cations immobilised in faujasite: synthesis, characterisation and antibacterial effects." Cellulose 25, no. 2: 1353-1364.
Results of this study demonstrate that enzymatic pretreatment of pulps enables energy savings in the refining process. Pretreatments of NBSK pulp with 3 different commercial xylanases resulted in a faster increase in the pulp freeness that reduced energy input for refining. The partial xylan removal by these enzymes affected the properties of cellulosic pulp and paper. The tensile properties of paper were improved by pretreatment with a pure xylanase while the additional activity of cellulases in the other two tested enzymes negatively influenced the tear resistance. Only the pure xylanase improved the pulp and paper properties. The results of this study provide evidence that the purity of xylanases used in papermaking is of great importance and may decide of paper quality and production costs.
Kamila Przybysz Buzała; Halina Kalinowska; Jędrzej Borkowski; Piotr Przybysz. Effect of xylanases on refining process and kraft pulp properties. Cellulose 2017, 25, 1319 -1328.
AMA StyleKamila Przybysz Buzała, Halina Kalinowska, Jędrzej Borkowski, Piotr Przybysz. Effect of xylanases on refining process and kraft pulp properties. Cellulose. 2017; 25 (2):1319-1328.
Chicago/Turabian StyleKamila Przybysz Buzała; Halina Kalinowska; Jędrzej Borkowski; Piotr Przybysz. 2017. "Effect of xylanases on refining process and kraft pulp properties." Cellulose 25, no. 2: 1319-1328.
Kamila Przybysz Buzała; Halina Kalinowska; Edyta Małachowska; Piotr Przybysz. The utility of selected kraft hardwood and softwood pulps for fuel ethanol production. Industrial Crops and Products 2017, 108, 824 -830.
AMA StyleKamila Przybysz Buzała, Halina Kalinowska, Edyta Małachowska, Piotr Przybysz. The utility of selected kraft hardwood and softwood pulps for fuel ethanol production. Industrial Crops and Products. 2017; 108 ():824-830.
Chicago/Turabian StyleKamila Przybysz Buzała; Halina Kalinowska; Edyta Małachowska; Piotr Przybysz. 2017. "The utility of selected kraft hardwood and softwood pulps for fuel ethanol production." Industrial Crops and Products 108, no. : 824-830.
Paper is produced mainly from wood fibrous pulps, which has been increasingly replaced by pulps from fast growing plants due to limited wood resources. In this work, properties of cellulosic pulps produced by the sulfate method from four fast growing grasses, poplar cultivar 'Hybrid 275', and European larch, as well as pine and birch wood chips, were compared. In addition, the cellulosic pulp yield, dimensions of fibers contained in the pulps and mechanical and optical characteristics of paper sheets produced from the pulps were compared. The pulp yield of the poplar cultivar 'Hybrid 275' (51.6%) was almost 5% higher than birch pulp (47.0%). Moreover, all of the investigated tensile properties of paper made from ‘Hybrid 275’ pulp were higher than for paper produced from birch pulp. Fast growing grasses, despite lower pulp yield (34.0 to 47.1%), showed comparable tensile properties to birch. Therefore, these pulps are promising raw materials for papermaking.
Kamila Przybysz; Edyta Małachowska; Danuta Martyniak; Piotr Boruszewski; Jolanta Iłowska; Halina Kalinowska; Piotr Przybysz. Yield of Pulp, Dimensional Properties of Fibers, and Properties of Paper Produced from Fast Growing Trees and Grasses. BioResources 2017, 13, 1372-1387 .
AMA StyleKamila Przybysz, Edyta Małachowska, Danuta Martyniak, Piotr Boruszewski, Jolanta Iłowska, Halina Kalinowska, Piotr Przybysz. Yield of Pulp, Dimensional Properties of Fibers, and Properties of Paper Produced from Fast Growing Trees and Grasses. BioResources. 2017; 13 (1):1372-1387.
Chicago/Turabian StyleKamila Przybysz; Edyta Małachowska; Danuta Martyniak; Piotr Boruszewski; Jolanta Iłowska; Halina Kalinowska; Piotr Przybysz. 2017. "Yield of Pulp, Dimensional Properties of Fibers, and Properties of Paper Produced from Fast Growing Trees and Grasses." BioResources 13, no. 1: 1372-1387.
The aim of this work was to assess the utility of seven different kraft pulps produced from softwood (pine), hardwood (poplar, birch and beech), wheat straw and hemp (bast and harl) as potential sources of sugar feedstocks for fermentation processes. The pulps contained low amounts of hemicelluloses (1.9–8.2% d.w.) and lignin (1.7–15% d.w.). The crystallinity index values ranged from 55% (wheat straw pulp) to 79% (hemp bast pulp), while the average DP varied from around 230 (hemp bast pulp) to 1482 (poplar and birch pulps). The results of enzymatic hydrolysis showed that not only the residual lignin content but also the cellulose crystallinity index decided on the sugar yields while the average polymerization degree had a weak impact. More reducing sugars were obtained from the hardwood pulps and wheat straw pulp (100% d.w.) than from the pine pulp (around 89% d.w.) and two hemp pulps (40.5% d.w. and 44.7% d.w. from the bast and harl pulps, respectively). Glucose was the dominating (69–79% w/w) soluble sugar in enzymatic hydrolysates of the pulps. The sugar profiles of these hydrolysates make them suitable sugar feedstocks for fermentation processes.
Kamila Przybysz Buzała; Halina Kalinowska; Piotr Przybysz; Edyta Małachowska. Conversion of various types of lignocellulosic biomass to fermentable sugars using kraft pulping and enzymatic hydrolysis. Wood Science and Technology 2017, 51, 873 -885.
AMA StyleKamila Przybysz Buzała, Halina Kalinowska, Piotr Przybysz, Edyta Małachowska. Conversion of various types of lignocellulosic biomass to fermentable sugars using kraft pulping and enzymatic hydrolysis. Wood Science and Technology. 2017; 51 (4):873-885.
Chicago/Turabian StyleKamila Przybysz Buzała; Halina Kalinowska; Piotr Przybysz; Edyta Małachowska. 2017. "Conversion of various types of lignocellulosic biomass to fermentable sugars using kraft pulping and enzymatic hydrolysis." Wood Science and Technology 51, no. 4: 873-885.
This work aimed at the determination of the influence of various types of lignocellulosic biomass on the performance of Ni/ZrO2 catalyst modified by CaO in the production of hydrogen rich gas from lignocellulosic feedstock. The catalysts were prepared by co-impregnation and sequential impregnation methods. The catalytic activity of the synthesized materials was examined in the high temperature conversion of cellulose (model compound) and real biomass samples—woodchips from pine, beech, birch and poplar. The surface properties of Ni/CaO–ZrO2 catalysts were characterized by X-ray diffraction (XRD), time-of-flight secondary ion mass spectrometry (ToF–SIMS), thermogravimetric analysis (TG–DTA–MS) and BET methods. The obtained results revealed that an incorporation of calcium into the structure of the catalyst led to a decrease in the coke formation rate on its surface. Moreover, the influence of the preparation method on the material composition and related properties was demonstrated.
Robert Ryczkowski; Agnieszka Ruppert; Piotr Przybysz; Karolina Chałupka; Jacek Grams. Hydrogen production from biomass woodchips using Ni/CaO–ZrO2 catalysts. Reaction Kinetics, Mechanisms and Catalysis 2017, 121, 97 -107.
AMA StyleRobert Ryczkowski, Agnieszka Ruppert, Piotr Przybysz, Karolina Chałupka, Jacek Grams. Hydrogen production from biomass woodchips using Ni/CaO–ZrO2 catalysts. Reaction Kinetics, Mechanisms and Catalysis. 2017; 121 (1):97-107.
Chicago/Turabian StyleRobert Ryczkowski; Agnieszka Ruppert; Piotr Przybysz; Karolina Chałupka; Jacek Grams. 2017. "Hydrogen production from biomass woodchips using Ni/CaO–ZrO2 catalysts." Reaction Kinetics, Mechanisms and Catalysis 121, no. 1: 97-107.
Samples of bleached kraft pine cellulosic pulp, either treated with an enzyme preparation (a Thermomyces lanuginosus xylanase, an Aspergillus sp. cellulase, and a multienzyme preparation NS-22086 containing both these activities) or untreated, were refined in a laboratory PFI mill. The treatment with cellulases contained in the last two preparations significantly improved the pulp’s susceptibility to refining (the target freeness value of 30°SR was achieved in a significantly shorter time), increased water retention value (WRV) and fines contents while the weighted average fiber length was significantly reduced. These changes of pulp parameters caused deterioration of paper strength properties. The treatment with the xylanase, which partially hydrolyzed xylan, small amounts of which are associated with cellulose fibers, only slightly loosened the structure of fibers. These subtle changes positively affected the susceptibility of the pulp to refining (refining energy was significantly reduced) and improved the static strength properties of paper. Thus, the treatment of kraft pulps with xylanases may lead to substantial savings of refining energy without negative effects on paper characteristics.
Kamila Przybysz Buzała; Piotr Przybysz; Halina Kalinowska; Małgorzata Derkowska. Effect of Cellulases and Xylanases on Refining Process and Kraft Pulp Properties. PLOS ONE 2016, 11, e0161575 .
AMA StyleKamila Przybysz Buzała, Piotr Przybysz, Halina Kalinowska, Małgorzata Derkowska. Effect of Cellulases and Xylanases on Refining Process and Kraft Pulp Properties. PLOS ONE. 2016; 11 (8):e0161575.
Chicago/Turabian StyleKamila Przybysz Buzała; Piotr Przybysz; Halina Kalinowska; Małgorzata Derkowska. 2016. "Effect of Cellulases and Xylanases on Refining Process and Kraft Pulp Properties." PLOS ONE 11, no. 8: e0161575.
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Kamila Przybysz. Wpływ stopnia rozdrobnienia i rodzaju drewna na przebieg hydrolizy enzymatycznej polisacharydów zawartych w surowcu drzewnym. PRZEGLĄD PAPIERNICZY 2016, 1, 43 -48.
AMA StyleKamila Przybysz. Wpływ stopnia rozdrobnienia i rodzaju drewna na przebieg hydrolizy enzymatycznej polisacharydów zawartych w surowcu drzewnym. PRZEGLĄD PAPIERNICZY. 2016; 1 (7):43-48.
Chicago/Turabian StyleKamila Przybysz. 2016. "Wpływ stopnia rozdrobnienia i rodzaju drewna na przebieg hydrolizy enzymatycznej polisacharydów zawartych w surowcu drzewnym." PRZEGLĄD PAPIERNICZY 1, no. 7: 43-48.
The objective of this work was to investigate the influence of hydrogen bonds between fibres on static and dynamic strength properties of paper. A commercial bleached pinewood kraft pulp was soaked in water, refined in a PFI, and used to form paper webs in different solvents, such as water, methanol, ethanol, n-propanol and n-butanol, to determine the effect of their dipole moment on static and dynamic strength properties of resulting paper sheets. Paper which was formed in water, being the solvent of the highest dipole moment among the tested ones, showed the highest breaking length and tear resistance. When paper webs were formed in n-butanol, which was the least polar among the solvents, these parameters were reduced by around 75%. These results provide evidence of the importance of water in paper web formation and strong impact of hydrogen bonds between fibres on strength properties of paper.
Piotr Przybysz; Marcin Dubowik; Marta Anna Kucner; Kazimierz Przybysz; Kamila Przybysz Buzała. Contribution of Hydrogen Bonds to Paper Strength Properties. PLOS ONE 2016, 11, e0155809 -e0155809.
AMA StylePiotr Przybysz, Marcin Dubowik, Marta Anna Kucner, Kazimierz Przybysz, Kamila Przybysz Buzała. Contribution of Hydrogen Bonds to Paper Strength Properties. PLOS ONE. 2016; 11 (5):e0155809-e0155809.
Chicago/Turabian StylePiotr Przybysz; Marcin Dubowik; Marta Anna Kucner; Kazimierz Przybysz; Kamila Przybysz Buzała. 2016. "Contribution of Hydrogen Bonds to Paper Strength Properties." PLOS ONE 11, no. 5: e0155809-e0155809.
Results of enzymatic hydrolysis of pine kraft cellulosic pulps (Kappa numbers ranging from 17.2 to 86.2) and waste fines from paper production line suggest that they are potential feedstocks for biofuel production. Glucose (61–68 % d.w.) and reducing sugars (around 90 % d.w.) yields from the pine cellulosic pulps with Kappa numbers ranging between 17.2 and 47.7 were higher than from the two pulps with Kappa numbers of 60.9 and 86.2. Glucose and reducing sugars yields from the latter pulps were around 54 and 45 % d.w. and 78 and 67 % d.w., respectively. The highest yields of glucose and total reducing sugars on a pine wood dry weight basis (29.3 and 43.1 %, respectively) were derived from the pulp with the Kappa number of 47.7. Thus the complete lignin removal from pine wood was not necessary to obtain maximum yields of glucose and other reducing sugars. Enzymatic hydrolysis of the fines from pine wood processing in a paper mill yielded around 75 % glucose and 78 % total reducing sugars on a dry weight basis that corresponded to around 34 and 36 % on a pine wood dry weight basis.
Kamila Przybysz Buzała; Piotr Przybysz; Halina Kalinowska; Kazimierz Przybysz; Marta Kucner; Marcin Dubowik. Evaluation of pine kraft cellulosic pulps and fines from papermaking as potential feedstocks for biofuel production. Cellulose 2015, 23, 649 -659.
AMA StyleKamila Przybysz Buzała, Piotr Przybysz, Halina Kalinowska, Kazimierz Przybysz, Marta Kucner, Marcin Dubowik. Evaluation of pine kraft cellulosic pulps and fines from papermaking as potential feedstocks for biofuel production. Cellulose. 2015; 23 (1):649-659.
Chicago/Turabian StyleKamila Przybysz Buzała; Piotr Przybysz; Halina Kalinowska; Kazimierz Przybysz; Marta Kucner; Marcin Dubowik. 2015. "Evaluation of pine kraft cellulosic pulps and fines from papermaking as potential feedstocks for biofuel production." Cellulose 23, no. 1: 649-659.
Poplar and pine cellulosic pulps derived by the sulfate process (Kappa numbers of 15.4 and 31.4, respectively) and a poplar thermomechanical pulp (TMP, Kappa number of 124.7) as well as 0.43–0.8 mm woodchips of various botanical origins (poplar, birch, lime, oak, beech, pine, and spruce) and poplar chips of five different average particle sizes, ranging from 1.6–2.0 to
Kamila Buzała; Piotr Przybysz; Justyna Rosicka-Kaczmarek; Halina Kalinowska. Comparison of digestibility of wood pulps produced by the sulfate and TMP methods and woodchips of various botanical origins and sizes. Cellulose 2015, 22, 2737 -2747.
AMA StyleKamila Buzała, Piotr Przybysz, Justyna Rosicka-Kaczmarek, Halina Kalinowska. Comparison of digestibility of wood pulps produced by the sulfate and TMP methods and woodchips of various botanical origins and sizes. Cellulose. 2015; 22 (4):2737-2747.
Chicago/Turabian StyleKamila Buzała; Piotr Przybysz; Justyna Rosicka-Kaczmarek; Halina Kalinowska. 2015. "Comparison of digestibility of wood pulps produced by the sulfate and TMP methods and woodchips of various botanical origins and sizes." Cellulose 22, no. 4: 2737-2747.
The digestibility of cellulosic pulps derived by the sulfate process was assessed using commercial multienzyme preparations. Poplar wood pulps of relatively low lignin contents (Kappa numbers of 15.4–24.2), birch, beech and pine wood pulps (Kappa numbers of 25.8–31.4), and wheat straw pulp (Kappa number of 29.5) were efficiently hydrolyzed by a commercial preparation NS-22086 from Novozymes, containing cellulases and xylanases. At around 1.3 % (w/w) substrate concentration, yields of glucose from the poplar pulps were around 80 % on a dry weight (d.w.) basis while for the other four pulps they varied between approximately 70 % (for pine pulp) and 78 % d.w. (for beech and wheat straw pulps). At around 7.4 % (w/w) poplar pulp (Kappa number of 24.2) concentration, glucose yield was around 61 % d.w. The NS-22086 preparation almost completely saccharified fines from a paper mill (around 74 % glucose yields on a dry weight basis) while digestion of poplar chips (particle size of 1.6–2.0 mm) and wheat straw chaff (particle size up to 6 mm) yielded around 5.3 and 14 % d.w. glucose, respectively (total reducing sugars yields of around 16 and 23 % d.w., respectively). These results show that plant biomass may be efficiently converted to glucose-rich hydrolysates by a two-step processing, consisting of kraft pulping followed by treatment with endo- and exo-type cellulases and hemicellulases. Glucose-rich hydrolysates may be also obtained by enzymatic digestion of fines from paper mills.
Kamila Buzała; Piotr Przybysz; Justyna Rosicka-Kaczmarek; Halina Kalinowska. Production of glucose-rich enzymatic hydrolysates from cellulosic pulps. Cellulose 2014, 22, 663 -674.
AMA StyleKamila Buzała, Piotr Przybysz, Justyna Rosicka-Kaczmarek, Halina Kalinowska. Production of glucose-rich enzymatic hydrolysates from cellulosic pulps. Cellulose. 2014; 22 (1):663-674.
Chicago/Turabian StyleKamila Buzała; Piotr Przybysz; Justyna Rosicka-Kaczmarek; Halina Kalinowska. 2014. "Production of glucose-rich enzymatic hydrolysates from cellulosic pulps." Cellulose 22, no. 1: 663-674.
Gravity dewatering of fibrous suspension is one of basic technological operations in paper production process. Although there are numerous methods to determine dewatering of such suspensions, none of them can measure undisturbed flow of removed water. In the paper the idea and design of a new apparatus for the determination of drainage rate of fibrous suspensions is presented. The apparatus differs from other known devices by minimisation of filtrate flow resistance in the outlet part of the equipment. In the second part of the paper measurements of the drainage rate have been presented. The flow resistance of the fluid through the bottom wire screen in the device was determined. The calculated flow resistance will be used in the developed model of dynamic drainage of fibrous suspensions, which will be discussed in our following paper (Przybysz et al., 2014).
Piotr Przybysz; Czeslaw Kuncewicz; František Rieger. A New Device for Characterisation of the Drainage Kinetics of Fibrous Suspensions Under Gravity. Chemical and Process Engineering 2014, 35, 409 -420.
AMA StylePiotr Przybysz, Czeslaw Kuncewicz, František Rieger. A New Device for Characterisation of the Drainage Kinetics of Fibrous Suspensions Under Gravity. Chemical and Process Engineering. 2014; 35 (4):409-420.
Chicago/Turabian StylePiotr Przybysz; Czeslaw Kuncewicz; František Rieger. 2014. "A New Device for Characterisation of the Drainage Kinetics of Fibrous Suspensions Under Gravity." Chemical and Process Engineering 35, no. 4: 409-420.