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Simon Trakhtenberg - One of the best experts on this subject based on the ideXlab platform.
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sugar beet Pulp and apple pomace dietary Fibers improve lipid metabolism in rats fed cholesterol
Food Chemistry, 2001Co-Authors: Maria Leontowicz, Elzbieta Bartnikowska, G Kulasek, Hanna Leontowicz, Shela Gorinstein, Simon TrakhtenbergAbstract:The eAect of diets supplemented with sugar beet Pulp Fiber (SBP, 10%) and apple pomace Fiber (AP, 10%) on lipids and lipids peroxides was investigated in 60 male Wistar rats. The rats were divided into six groups of 10 and adapted to cholesterol-free or 0.3% cholesterol diets. The basal diet (BD) contained wheat meal, barley meal, wheat hulls, meat-bone meal, barley sprouts, skimmed milk, fodder yeast, mineral and vitamin mixtures. The Control group (Control) consumed BD only. To the BD were added 3 g/kg cholesterol (Chol), 100 g/kg dry sugar beet Pulp Fiber (SBP), both 100 g/kg sugar beet Pulp Fiber and 3 g/kg cholesterol (SBP+Chol), 100 g/kg apple pomace Fiber (AP), both 100 g/kg apple pomace Fiber and 3 g/kg cholesterol (AP+Chol). The experiment lasted 40 days. Plasma total cholesterol (TC), LDL cholesterol (LDL-C), HDL cholesterol (HDL-C), triglycerides (TG), total phospholipids (TPH), HDL phospholipids (HDL-PH), lipid peroxides (LP) and liver TC concentration were measured. Groups did not diAer before the experiment. In the Chol+SBP and the Chol+AP vs. Chol group the sugar beet Pulp and apple pomace dietary Fiber supplemented diet significantly (P<0.05) hindered the rise of plasma lipids: (a) TCˇ2.97 vs. 3.69 mmol/l, ˇ20% and 3.01 vs 3.69 mmol/l, ˇ18.4%, respectively; (b) LDL-C ˇ1.36 vs. 2.02 mmol/l, ˇ32.6% and 1.39 vs. 2.02 mmol/l, ˇ31.2%, respectively; (c) TGˇ0.73 vs. 0.88 mmol/l, and 0.75 vs. 0.88 mmol/l;ˇ17 andˇ14.8%, respectively, and TC in liver (17.1 vs. 24.3 mmol/g,ˇ29.6% and 17.9 v. 24.3 mmol/g,ˇ26.3%, respectively. Sugar beet and apple pomace Fiber-supplemented diets significantly hindered the decrease in HDL-PH (0.79 vs. 0.63 mmol/l,ˇ25.3%, P<0.025 and 0.75 vs. 0.63 mmol/l,ˇ19%, P<0.05, respectively) and decreased the level of TPH (1.34 vs. 1.74 mmol/l,ˇ23%, P<0.005 and 1.37 vs. 1.74 mmol/l,ˇ21.3%, P<0.01, respectively). Both sugar beet Pulp Fiber and apple pomace Fiber, in rats fed the basal diet without cholesterol, did not significantly aAect the variables measured. Neither sugar beet Pulp Fiber or apple pomace Fiber-supplemented diets influenced the level of lipid peroxides. These results demonstrate that sugar beet Pulp Fiber and to a lesser degree apple pomace Fiber possess hypolipidemic properties. This is more evident when sugar beet Pulp Fiber or apple pomace Fiber are added to the diet of rats fed cholesterol. The hypolipidemic eAects of both sugar beet Pulp Fiber and apple pomace Fiber can be attributed to their water-soluble parts. The sugar beet Pulp and apple pomace Fibers have no antioxidant properties. # 2000 Elsevier Science Ltd. All rights reserved.
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sugar beet Pulp and apple pomace dietary Fibers improve lipid metabolism in rats fed cholesterol
Food Chemistry, 2001Co-Authors: Maria Leontowicz, Elzbieta Bartnikowska, G Kulasek, Hanna Leontowicz, Shela Gorinstein, Simon TrakhtenbergAbstract:The eAect of diets supplemented with sugar beet Pulp Fiber (SBP, 10%) and apple pomace Fiber (AP, 10%) on lipids and lipids peroxides was investigated in 60 male Wistar rats. The rats were divided into six groups of 10 and adapted to cholesterol-free or 0.3% cholesterol diets. The basal diet (BD) contained wheat meal, barley meal, wheat hulls, meat-bone meal, barley sprouts, skimmed milk, fodder yeast, mineral and vitamin mixtures. The Control group (Control) consumed BD only. To the BD were added 3 g/kg cholesterol (Chol), 100 g/kg dry sugar beet Pulp Fiber (SBP), both 100 g/kg sugar beet Pulp Fiber and 3 g/kg cholesterol (SBP+Chol), 100 g/kg apple pomace Fiber (AP), both 100 g/kg apple pomace Fiber and 3 g/kg cholesterol (AP+Chol). The experiment lasted 40 days. Plasma total cholesterol (TC), LDL cholesterol (LDL-C), HDL cholesterol (HDL-C), triglycerides (TG), total phospholipids (TPH), HDL phospholipids (HDL-PH), lipid peroxides (LP) and liver TC concentration were measured. Groups did not diAer before the experiment. In the Chol+SBP and the Chol+AP vs. Chol group the sugar beet Pulp and apple pomace dietary Fiber supplemented diet significantly (P<0.05) hindered the rise of plasma lipids: (a) TCˇ2.97 vs. 3.69 mmol/l, ˇ20% and 3.01 vs 3.69 mmol/l, ˇ18.4%, respectively; (b) LDL-C ˇ1.36 vs. 2.02 mmol/l, ˇ32.6% and 1.39 vs. 2.02 mmol/l, ˇ31.2%, respectively; (c) TGˇ0.73 vs. 0.88 mmol/l, and 0.75 vs. 0.88 mmol/l;ˇ17 andˇ14.8%, respectively, and TC in liver (17.1 vs. 24.3 mmol/g,ˇ29.6% and 17.9 v. 24.3 mmol/g,ˇ26.3%, respectively. Sugar beet and apple pomace Fiber-supplemented diets significantly hindered the decrease in HDL-PH (0.79 vs. 0.63 mmol/l,ˇ25.3%, P<0.025 and 0.75 vs. 0.63 mmol/l,ˇ19%, P<0.05, respectively) and decreased the level of TPH (1.34 vs. 1.74 mmol/l,ˇ23%, P<0.005 and 1.37 vs. 1.74 mmol/l,ˇ21.3%, P<0.01, respectively). Both sugar beet Pulp Fiber and apple pomace Fiber, in rats fed the basal diet without cholesterol, did not significantly aAect the variables measured. Neither sugar beet Pulp Fiber or apple pomace Fiber-supplemented diets influenced the level of lipid peroxides. These results demonstrate that sugar beet Pulp Fiber and to a lesser degree apple pomace Fiber possess hypolipidemic properties. This is more evident when sugar beet Pulp Fiber or apple pomace Fiber are added to the diet of rats fed cholesterol. The hypolipidemic eAects of both sugar beet Pulp Fiber and apple pomace Fiber can be attributed to their water-soluble parts. The sugar beet Pulp and apple pomace Fibers have no antioxidant properties. # 2000 Elsevier Science Ltd. All rights reserved.
Kimberly E Kurtis - One of the best experts on this subject based on the ideXlab platform.
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Supplementary cementitious materials for mitigating degradation of kraft Pulp Fiber-cement composites
Cement and Concrete Research, 2007Co-Authors: B J Mohr, Joseph J Biernacki, Kimberly E KurtisAbstract:Kraft Pulp Fiber reinforced cement-based materials are being increasingly used where performance after exposure to environmental conditions must be ensured. However, significant losses in mechanical performance due to wet/dry cycling have been observed in these composites, when portland cement is the only cementitious material used in the matrix. In this research program, the effects of partial portland cement replacement with various supplementary cementitious materials were investigated. Binary, ternary, and quaternary blends of silica fume, slag, Class C fly ash, Class F fly ash, metakaolin, and diatomaceous earth/volcanic ash blends were examined for their effect on the degradation of kraft Pulp Fiber-cement composite mechanical properties (i.e., strength and toughness) during wet/dry cycling. After 25 wet/dry cycles, it was shown that binary composites containing 90% slag, 30% metakaolin, or greater than 30% silica fume did not exhibit any signs of degradation, as measured through mechanical testing and microscopy. Ternary blends containing 70% slag/10% metakaolin or 70% slag/10% silica fume were also effective in preventing degradation. A reduction in calcium hydroxide content and the stability of the alkali content due to supplementary cementitious material addition were shown to be primary mechanisms for improved durability.
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microstructural and chemical effects of wet dry cycling on Pulp Fiber cement composites
Cement and Concrete Research, 2006Co-Authors: B J Mohr, Joseph J Biernacki, Kimberly E KurtisAbstract:The microstructural and chemical mechanisms responsible for Pulp Fiber–cement composite degradation during wet/dry cycling are being investigated through environmental scanning electron microscopy (ESEM), energy dispersive spectroscopy (EDS), and mechanical testing. Based on these results, a three-part progressive degradation mechanism for cast-in-place kraft Pulp Fiber–cement composites is proposed, which involves: (1) initial Fiber–cement or Fiber interlayer debonding, (2) reprecipitation of needle-like or sheath-like ettringite within the void space at the former Fiber–cement interface or between the S1 and S2 Fiber layers, and (3) Fiber mineralization due to reprecipitation of calcium hydroxide filling the spaces within the Fiber cell wall structure. This investigation also revealed that kraft Pulp Fibers exhibit poor resistance to degradation due to their inferior dimensional stability, as compared to thermomechanical Pulp (TMP) Fibers. TMP Fibers contain significant amounts of lignin, which is alkali sensitive. Despite this, TMP Fiber–cement composite exhibit improved resistance to degradation during wet/dry cycling. It is proposed that this improvement in durability may be attributed to the presence of lignin in the cell wall restricting Fiber dimensional changes during wetting and drying, and hence, minimizing Fiber–cement debonding. Additionally, it is proposed that lignin acts as physical barrier to calcium hydroxide formation within the Fiber cell wall, minimizing Fiber mineralization of TMP Fibers.
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durability of thermomechanical Pulp Fiber cement composites to wet dry cycling
Cement and Concrete Research, 2005Co-Authors: B J Mohr, H Nanko, Kimberly E KurtisAbstract:Previous research efforts on Pulp Fiber-cement composites have largely concentrated on kraft Pulp Fiber composites. In this research program, thermomechanical Pulp (TMP) Fibers were investigated as an economical alternative to kraft Pulp Fibers as reinforcement in Fiber-cement composites. Prior to wet/dry cycling, TMP composites exhibited increased first crack strength, but lower peak strength and lower post-cracking toughness, as compared to unbleached and bleached kraft Pulp composites at equivalent Fiber volume fractions. It is believed that this behavior can be attributed to the lower tensile strength and shorter Fiber length of TMP Fibers as compared to kraft Fibers. After 25 wet/dry cycles, TMP composites showed losses in first crack (peak) strength and post-cracking toughness. However, TMP composites exhibited a slower progression of degradation during wet/dry cycling than composites containing bleached or unbleached kraft Fibers.
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durability of kraft Pulp Fiber cement composites to wet dry cycling
Cement & Concrete Composites, 2005Co-Authors: B J Mohr, H Nanko, Kimberly E KurtisAbstract:Abstract If Pulp Fiber–cement composites are to be used for exterior applications, the effect of cyclical wet/dry exposure must be known. In this research program the effects of three Fiber treatments—beating, bleaching, and drying—were investigated to identify those that may minimize effects of environmental aging and degradation during wet/dry cycling. After 25 wet/dry cycles, all composites showed significant losses in first crack strength, peak strength, and post-cracking toughness. The majority of losses in mechanical properties occurred within the first 5 wet/dry cycles, though ductile Fiber failure was still observed by scanning electron microscopy (SEM). A three-part progressive degradation mechanism during wet/dry cycling is proposed: (1) initial Fiber–cement debonding, (2) reprecipitation of hydration products within the void space at the former Fiber–cement interface, and (3) Fiber embrittlement due to Fiber cell wall mineralization. Unbeaten Fiber–cement composites exhibited greater peak strength and post-cracking toughness, prior to cycling, while no significant differences were seen after 25 cycles. The effects of Fiber beating varied prior to and after cycling. Unbleached Fiber–cement composites exhibited the slowest progression of degradation during cycling. The initial drying state appeared to have no effect on composite performance after 25 wet/dry cycles.
Guillaume Polidori - One of the best experts on this subject based on the ideXlab platform.
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characterization of beet Pulp Fiber reinforced potato starch biopolymer composites for building applications
Construction and Building Materials, 2019Co-Authors: Hamzé Karaky, Nadim El Wakil, Mohammed Lachi, Chadi Maalouf, Alexandre Gacoin, Christophe Bliard, Guillaume PolidoriAbstract:Abstract This work deals with the making of a new renewable green material for building insulation from sugar beet Pulp and potato starch. The material is both lightweight and ecofriendly. The influence of starch/extruded sugar beet Pulp mass ratio (S/EBP) is studied. Four mass ratios are considered, 10, 20, 30 and 40% (relative to the starch). Samples are characterized in terms of absolute and bulk density, sound absorption coefficient, compressive and flexural strength, as well as and hygrothermal properties (the moisture buffering value and thermal conductivity). The sound absorption coefficient shows that this material is a good sound absorber, especially in medium and high frequencies. The sound absorption capacity depends on the Fiber content and the humidity content. The best values are between 0.6 and 0.8. The compressive strength increases linearly with the S/EBP weight ratio to reach 0.52 MPa and the compressive strain is 30%. The elasticity modulus and the Poisson’s ratios were also studied. The transversal and vertical strain were measured using ARAMIS optical system. The moisture buffering value was measured according to Nordtest Protocol. The recorded moisture buffering value was between 2.6 and 2.8 g/(%RH.m2) and shows that the sugar beet Pulp-starch composite is an excellent hygric regulator. The thermal conductivity is to around 0.070 W/(m·K). The results obtained shows that increasing starch amount tends to decrease composite porosity but increases thermal conductivity and mechanical properties. Depending on the starch content, beet Pulp composites have a good thermal and acoustical performance and can be used as building materials.
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characterization of beet Pulp Fiber reinforced potato starch biopolymer composites for building applications
Construction and Building Materials, 2019Co-Authors: Hamzé Karaky, Nadim El Wakil, Mohammed Lachi, Chadi Maalouf, Alexandre Gacoin, Christophe Bliard, Guillaume PolidoriAbstract:Abstract This work deals with the making of a new renewable green material for building insulation from sugar beet Pulp and potato starch. The material is both lightweight and ecofriendly. The influence of starch/extruded sugar beet Pulp mass ratio (S/EBP) is studied. Four mass ratios are considered, 10, 20, 30 and 40% (relative to the starch). Samples are characterized in terms of absolute and bulk density, sound absorption coefficient, compressive and flexural strength, as well as and hygrothermal properties (the moisture buffering value and thermal conductivity). The sound absorption coefficient shows that this material is a good sound absorber, especially in medium and high frequencies. The sound absorption capacity depends on the Fiber content and the humidity content. The best values are between 0.6 and 0.8. The compressive strength increases linearly with the S/EBP weight ratio to reach 0.52 MPa and the compressive strain is 30%. The elasticity modulus and the Poisson’s ratios were also studied. The transversal and vertical strain were measured using ARAMIS optical system. The moisture buffering value was measured according to Nordtest Protocol. The recorded moisture buffering value was between 2.6 and 2.8 g/(%RH.m2) and shows that the sugar beet Pulp-starch composite is an excellent hygric regulator. The thermal conductivity is to around 0.070 W/(m·K). The results obtained shows that increasing starch amount tends to decrease composite porosity but increases thermal conductivity and mechanical properties. Depending on the starch content, beet Pulp composites have a good thermal and acoustical performance and can be used as building materials.
Maria Leontowicz - One of the best experts on this subject based on the ideXlab platform.
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sugar beet Pulp and apple pomace dietary Fibers improve lipid metabolism in rats fed cholesterol
Food Chemistry, 2001Co-Authors: Maria Leontowicz, Elzbieta Bartnikowska, G Kulasek, Hanna Leontowicz, Shela Gorinstein, Simon TrakhtenbergAbstract:The eAect of diets supplemented with sugar beet Pulp Fiber (SBP, 10%) and apple pomace Fiber (AP, 10%) on lipids and lipids peroxides was investigated in 60 male Wistar rats. The rats were divided into six groups of 10 and adapted to cholesterol-free or 0.3% cholesterol diets. The basal diet (BD) contained wheat meal, barley meal, wheat hulls, meat-bone meal, barley sprouts, skimmed milk, fodder yeast, mineral and vitamin mixtures. The Control group (Control) consumed BD only. To the BD were added 3 g/kg cholesterol (Chol), 100 g/kg dry sugar beet Pulp Fiber (SBP), both 100 g/kg sugar beet Pulp Fiber and 3 g/kg cholesterol (SBP+Chol), 100 g/kg apple pomace Fiber (AP), both 100 g/kg apple pomace Fiber and 3 g/kg cholesterol (AP+Chol). The experiment lasted 40 days. Plasma total cholesterol (TC), LDL cholesterol (LDL-C), HDL cholesterol (HDL-C), triglycerides (TG), total phospholipids (TPH), HDL phospholipids (HDL-PH), lipid peroxides (LP) and liver TC concentration were measured. Groups did not diAer before the experiment. In the Chol+SBP and the Chol+AP vs. Chol group the sugar beet Pulp and apple pomace dietary Fiber supplemented diet significantly (P<0.05) hindered the rise of plasma lipids: (a) TCˇ2.97 vs. 3.69 mmol/l, ˇ20% and 3.01 vs 3.69 mmol/l, ˇ18.4%, respectively; (b) LDL-C ˇ1.36 vs. 2.02 mmol/l, ˇ32.6% and 1.39 vs. 2.02 mmol/l, ˇ31.2%, respectively; (c) TGˇ0.73 vs. 0.88 mmol/l, and 0.75 vs. 0.88 mmol/l;ˇ17 andˇ14.8%, respectively, and TC in liver (17.1 vs. 24.3 mmol/g,ˇ29.6% and 17.9 v. 24.3 mmol/g,ˇ26.3%, respectively. Sugar beet and apple pomace Fiber-supplemented diets significantly hindered the decrease in HDL-PH (0.79 vs. 0.63 mmol/l,ˇ25.3%, P<0.025 and 0.75 vs. 0.63 mmol/l,ˇ19%, P<0.05, respectively) and decreased the level of TPH (1.34 vs. 1.74 mmol/l,ˇ23%, P<0.005 and 1.37 vs. 1.74 mmol/l,ˇ21.3%, P<0.01, respectively). Both sugar beet Pulp Fiber and apple pomace Fiber, in rats fed the basal diet without cholesterol, did not significantly aAect the variables measured. Neither sugar beet Pulp Fiber or apple pomace Fiber-supplemented diets influenced the level of lipid peroxides. These results demonstrate that sugar beet Pulp Fiber and to a lesser degree apple pomace Fiber possess hypolipidemic properties. This is more evident when sugar beet Pulp Fiber or apple pomace Fiber are added to the diet of rats fed cholesterol. The hypolipidemic eAects of both sugar beet Pulp Fiber and apple pomace Fiber can be attributed to their water-soluble parts. The sugar beet Pulp and apple pomace Fibers have no antioxidant properties. # 2000 Elsevier Science Ltd. All rights reserved.
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sugar beet Pulp and apple pomace dietary Fibers improve lipid metabolism in rats fed cholesterol
Food Chemistry, 2001Co-Authors: Maria Leontowicz, Elzbieta Bartnikowska, G Kulasek, Hanna Leontowicz, Shela Gorinstein, Simon TrakhtenbergAbstract:The eAect of diets supplemented with sugar beet Pulp Fiber (SBP, 10%) and apple pomace Fiber (AP, 10%) on lipids and lipids peroxides was investigated in 60 male Wistar rats. The rats were divided into six groups of 10 and adapted to cholesterol-free or 0.3% cholesterol diets. The basal diet (BD) contained wheat meal, barley meal, wheat hulls, meat-bone meal, barley sprouts, skimmed milk, fodder yeast, mineral and vitamin mixtures. The Control group (Control) consumed BD only. To the BD were added 3 g/kg cholesterol (Chol), 100 g/kg dry sugar beet Pulp Fiber (SBP), both 100 g/kg sugar beet Pulp Fiber and 3 g/kg cholesterol (SBP+Chol), 100 g/kg apple pomace Fiber (AP), both 100 g/kg apple pomace Fiber and 3 g/kg cholesterol (AP+Chol). The experiment lasted 40 days. Plasma total cholesterol (TC), LDL cholesterol (LDL-C), HDL cholesterol (HDL-C), triglycerides (TG), total phospholipids (TPH), HDL phospholipids (HDL-PH), lipid peroxides (LP) and liver TC concentration were measured. Groups did not diAer before the experiment. In the Chol+SBP and the Chol+AP vs. Chol group the sugar beet Pulp and apple pomace dietary Fiber supplemented diet significantly (P<0.05) hindered the rise of plasma lipids: (a) TCˇ2.97 vs. 3.69 mmol/l, ˇ20% and 3.01 vs 3.69 mmol/l, ˇ18.4%, respectively; (b) LDL-C ˇ1.36 vs. 2.02 mmol/l, ˇ32.6% and 1.39 vs. 2.02 mmol/l, ˇ31.2%, respectively; (c) TGˇ0.73 vs. 0.88 mmol/l, and 0.75 vs. 0.88 mmol/l;ˇ17 andˇ14.8%, respectively, and TC in liver (17.1 vs. 24.3 mmol/g,ˇ29.6% and 17.9 v. 24.3 mmol/g,ˇ26.3%, respectively. Sugar beet and apple pomace Fiber-supplemented diets significantly hindered the decrease in HDL-PH (0.79 vs. 0.63 mmol/l,ˇ25.3%, P<0.025 and 0.75 vs. 0.63 mmol/l,ˇ19%, P<0.05, respectively) and decreased the level of TPH (1.34 vs. 1.74 mmol/l,ˇ23%, P<0.005 and 1.37 vs. 1.74 mmol/l,ˇ21.3%, P<0.01, respectively). Both sugar beet Pulp Fiber and apple pomace Fiber, in rats fed the basal diet without cholesterol, did not significantly aAect the variables measured. Neither sugar beet Pulp Fiber or apple pomace Fiber-supplemented diets influenced the level of lipid peroxides. These results demonstrate that sugar beet Pulp Fiber and to a lesser degree apple pomace Fiber possess hypolipidemic properties. This is more evident when sugar beet Pulp Fiber or apple pomace Fiber are added to the diet of rats fed cholesterol. The hypolipidemic eAects of both sugar beet Pulp Fiber and apple pomace Fiber can be attributed to their water-soluble parts. The sugar beet Pulp and apple pomace Fibers have no antioxidant properties. # 2000 Elsevier Science Ltd. All rights reserved.
Sezgin Koray And Simsir - One of the best experts on this subject based on the ideXlab platform.
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Chemical Composition, Fiber Morphology, and Kraft Pulping of Bracken Stalks (Pteridium aquilinum (L.) Kuhn)
'Faculty of Forestry University of Zagreb', 2018Co-Authors: Sezgin Koray And SimsirAbstract:In this study, kraft, kraft-NaBH4, and kraft-KBH4 Pulp and paper properties of the bracken stalks (Pteridium aauUinum (L.) Kuhn) were determined. Also, the chemical composition and Fiber properties of bracken stalks were evaluated. NaBH4 and KBH4 were separately added to cooking liquor by 0.5 \%, 1 \%, 1.5 \%, and 2 \% (oven dried wood). The boron compound-free kraft Pulp were also made as control Pulp. Fiber length and Fiber width of bracken stalks were determined as 1.25 mm and 24 mu m, respectively. Bracken stalks are composed of 73.34 \% holocellulose, 32.55 \% alpha-cellulose, and 30.79 \% lignin. In addition, the Pulp yield was increased with additions of both boron compounds, while kappa number was decreased. Also, highest strength increases determined in 0.5 \% NaBH4 added Pulp. These results showed that bracken stalks can be used as a raw material for kraft Pulp production
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Chemical composition, Fiber morphology, and kraft Pulping of bracken stalks (Pteridium aquilinum (L.) Kuhn) [Kemijski sastav, morfologija vlakana i sulfatni postupak proizvodnje celuloze od stabljika paprati (Pteridium aquilinum (L.) Ksuhn)]
'Faculty of Forestry University of Zagreb', 2018Co-Authors: Sezgin Koray And SimsirAbstract:In this study, kraft, kraft-NaBH4, and kraft-KBH4 Pulp and paper properties of the bracken stalks (Pteridium aquilinum (L.) Kuhn) were determined. Also, the chemical composition and Fiber properties of bracken stalks were evaluated. NaBH4 and KBH4 were separately added to cooking liquor by 0.5 %, 1 %, 1.5 %, and 2 % (oven dried wood). The boron compound-free kraft Pulp were also made as control Pulp. Fiber length and Fiber width of bracken stalks were determined as 1.25 mm and 24 μm, respectively. Bracken stalks are composed of 73.34 % holocellulose, 32.55 % α-cellulose, and 30.79 % lignin. In addition, the Pulp yield was increased with additions of both boron compounds, while kappa number was decreased. Also, highest strength increases determined in 0.5 % NaBH4 added Pulp. These results showed that bracken stalks can be used as a raw material for kraft Pulp production. © 2018, Journal Drvna Industrija. All rights reserved
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Kemijski sastav, morfologija vlakana i sulfatni postupak proizvodnje celuloze od stabljika paprati (Pteridium aquilinum (L.) Kuhn)
'Faculty of Forestry University of Zagreb', 2018Co-Authors: Sezgin Koray Gülsoy, Sezgin Koray And SimsirAbstract:In this study, kraft, kraft-NaBH4, and kraft-KBH4 Pulp and paper properties of the bracken stalks (Pteridium aquilinum (L.) Kuhn) were determined. Also, the chemical composition and Fiber properties of bracken stalks were evaluated. NaBH4 and KBH4 were separately added to cooking liquor by 0.5 %, 1 %, 1.5 %, and 2 % (oven dried wood). The boron compound-free kraft Pulp were also made as control Pulp. Fiber length and Fiber width of bracken stalks were determined as 1.25 mm and 24 μm, respectively. Bracken stalks are composed of 73.34 % holocellulose, 32.55 % α-cellulose, and 30.79 % lignin. In addition, the Pulp yield was increased with additions of both boron compounds, while kappa number was decreased. Also, highest strength increases determined in 0.5 % NaBH4 added Pulp. These results showed that bracken stalks can be used as a raw material for kraft Pulp production.U radu su opisana istraživanja svojstava kraft, kraft-NaBH4 i kraft-KBH4 celuloze i papira proizvedenih od stabljika paprati (Pteridium aquilinum (L.) Kuhn). Ocijenjeni su kemijski sastav i svojstva vlakana stabljika paprati. Otopini za kuhanje odvojeno su dodavani NaBH4 i KBH4 u postotcima 0,5; 1; 1,5 i 2 % (u odnosu prema apsolutno suhom drvu). Kraft celuloza bez spojeva bora proizvedena je kao kontrolni uzorak. Duljina vlakana stabljika paprati iznosila je 1,25 mm, a širina 24 μm. Stabljike paprati sadržavaju 73,34 % holoceluloze, 32,55 % α-celuloze i 30,79 % lignina. Rezultati su pokazali da je uz dodatak obaju spojeva bora prinos celuloze povećan, dok je Kapa broj smanjen. Usto, rezultati su pokazali najveće povećanje čvrstoće za celulozu dobivenu dodatkom 0,5 % NaBH4. Na temelju dobivenih rezultata može se zaključiti da se stabljike paprati mogu upotrebljavati kao sirovina za proizvodnju kraft celuloze
