BioResources (E-Journal)
Not a member yet
1916 research outputs found
Sort by
Design Strategy for Outdoor Leisure Chairs Based on Parametric Plant Patterns Using Biobased Materials
No full textTo address the growing demand for sustainable, functional, and culturally aesthetic outdoor leisure chairs while enhancing their emotional and cultural significance, this study proposes a design strategy that integrates Kansei engineering with parametric derivation. Plant patterns derived from traditional Chinese artifacts were selected as the research subject, and their types and structural characteristics were systematically classified to construct a representative pattern library. The semantic differential method was employed to evaluate perceptual images and identify patterns consistent with the aesthetic values of outdoor furniture. By using parametric software, the shape of the pattern is simplified into functional holes, achieving lightweight and heat dissipation functions. Two conceptual designs for outdoor leisure chairs were realized using bio-based materials, resulting in reduced material use. The proposed designs were assessed using fuzzy evaluation methods, which yielded high satisfaction scores and validated the feasibility and effectiveness of the approach
Effect of Thermal Modification Process on Acoustic Properties Used in Musical Instrument Wood
No full textSpruce (Picea orientalis), maple (Acer pseudoplatanus), and mahogany (Khaya ivorensis) woods are commonly used wood types in making musical instruments. In this study they were subjected to thermal modification at 210 °C for 90 min. The changes in bending strength, sound velocity, acoustic radiation, acoustic impedance, and static and dynamic elasticity modulus values of wood samples after thermal modification were investigated. The results showed that spruce wood's acoustic performance decreased after thermal modification, while maple wood improved. Meanwhile, the acoustic performance of mahogany wood remained unaffected by thermal modification. Examining the alterations in mechanical properties revealed a decline in bending strength in all wood samples that underwent thermal modification. However, an increase in modulus of elasticity values was observed in spruce, whereas no change was found in mahogany and maple
Statistical Optimization of a Trichoderma-based Enzyme Combination for Saccharification of Steam-exploded Lignocellulosic Biomass
No full textThis study aimed to determine the optimal enzyme combination conditions for improving the saccharification efficiency of softwood biomass (Larix kaempferi). For this purpose, cellulase derived from Trichoderma sp. KMF006 was combined with a commercial enzyme (Cellic® CTec3). Comparative hydrolysis experiments with individual enzymes showed that L. kaempferi exhibited a lower glucose yield than hardwood, suggesting the need for a complementary enzyme combination. A Plackett-Burman Design (PBD) was used to identify significant variables, including substrate concentration, enzyme loading, pH, and the KMF006 blending ratio. The significant factors were further optimized using a Box-Behnken Design (BBD). The optimal conditions were determined to be a substrate concentration of 9% (w/v), enzyme loading of 60 FPU/g-glucan, pH of 6.0, and the KMF006 blending ratio of 25.5%. The predicted maximum glucose yield under these conditions was 63.9%, representing a 21.8% increase compared to CTec3 alone and a 32.4% increase compared to KMF006 alone. These results suggest that up to 25% of the commercial enzyme dosage can be substituted with KMF006 without compromising hydrolysis performance. Overall, this study demonstrates the feasibility of an enzyme combination approach for enhancing softwood saccharification
Indigenous Woods of the Carving Zoomorphic Art in the Southern Brazilian Atlantic Forest
No full textTrees constitute an inseparable part of artistic expression in many human cultures. The zoomorphic woodcarving art of the Guarani Mbya Indigenous People—an ethnic group that once densely occupied much of South America—embodies the synergy between bioeconomy, technology, art, and ancestral knowledge of trees and their woods. It reflects the millennial sociocultural relationship between humans, their territory, and sustainable management practices aimed at preserving both ancestral culture and biodiversity. This editorial highlights the connection between wood properties and Indigenous carving art within the context of the Atlantic Forest in southern Brazil, aiming to demonstrate ancestral knowledge of the forest and its species
Effects of Thermal Bio-Oil Immersion Process on Antilarvicidal, Anisotropic, Mechanical, and Thermal Properties of Turkish Pine Wood
No full textEngineering properties of Turkish pine wood were evaluated to determine effects of a bio-oil thermal immersion process. Wood samples were impregnated with linseed oil, castor oil, and a mix of both oils. The investigation encompassed antilarvicidal activity, bending and compressive strength, anisotropic swelling, thermogravimetric analysis (TGA), and Fourier transform infrared (FTIR) spectroscopy. Linseed and castor oils demonstrated potent antilarvicidal properties, achieving 100% and 92% mortality rates, respectively. The mixed oil exhibited 79.2% mortality. The thermal immersion treatment significantly enhanced the bending and compressive strength, and linseed oil yielded the highest improvements at 28.7% and 77.0%, respectively. Anisotropic swelling notably decreased. The linseed oil showed the greatest reduction (7.1%) and the mixed oil the least (2.7%). TGA results indicated improved thermal stability, with weight losses of 1.7%, 2.0%, and 2.2% for linseed oil, castor oil, and mixed oil, respectively. FTIR analysis revealed new peak regions ranging from 1159 to 3398 cm⁻¹ and suggested significant interactions between the bio-oils and the cell wall components, particularly for linseed oil. In conclusion, the thermal bio-oil immersion treatment effectively improved the selected properties of this wood
Shear Analogy Stiffness Adjustment for CLT Plates
No full textIn serviceability limit state, one-dimensional approaches are commonly used to estimate the bending stiffness and vertical displacement of cross-laminated timber (CLT) panels, such as the shear analogy method combined with mechanics of materials equations. Despite their simplicity, these equations disregard the orthotropic nature of wood’s elastic properties and the actual dimensions of CLT panels (treated as beams), affecting displacement predictions. In this context, a parametric study was conducted in this paper using the finite element method. Then, symbolic regression was applied to propose a correction factor for adjusting the stiffness of CLT panels obtained using the shear analogy method. The symbolic regression model for the correction factor demonstrated high accuracy (R2 = 0.9834). Adjusting the shear analogy stiffness with the proposed correction factor reduced the maximum error from 18% to 2% compared to the original method and numerical results. The model retained its accuracy in additional simulations, with percentage errors ranging from 0 to 1%
Influence of Various Adhesives on Properties of Betung Bamboo Laminated Boards
No full textBamboo can be engineered for laminate boards and other sustainable construction material. The adhesive type is expected to affect the laminated board's quality. This study analyzed the physical (density, moisture content, and delamination) and mechanical (bending and shear strength) properties of betung (Dendrocalamus asper) bamboo laminated boards prepared using various adhesives. The most favorable adhesive for enhancing betung bamboo laminated boards was determined. The bamboo lamina was arranged into boards (3 layers) measuring 30 x 15 x 1.5 cm each in length, width, and thickness. The laminated board was glued using isocyanate, epoxy, and polyvinyl acetate (PVAc) adhesives using the double glue spread technique. The laminated board was tested for its physical and mechanical properties, following the JAS 234:2003 standard. Betung bamboo laminated board with isocyanate, epoxy, and PVAc adhesives had densities ranging from 0.89 g/cm3 to 0.95 g/cm3, moisture contents of 7.64% to 24.37%, delamination ranges from 0% to 100%, modulus of elasticities from 109,000 to 178,000 kg/cm2, modulus of rupture values range from 709 to 1,570 kg/cm2, and shear strength values of 25.0 to 60.0 kg/cm2. Isocyanate adhesive was found to have the best quality in physical tests, while epoxy adhesive achieved the best quality in mechanical tests of laminated boards
Analysis of Evaluation Indicators of Furniture Appearance Imagery by Different Consumers
No full textConsumers rely on sensory perception to judge the appearance of furniture, often guided by intuitive associations with shape. This process allows furniture designers to better understand and respond to consumer preferences and expectations. This work used a questionnaire design and analysis survey by using the material, color, style, shape, and surface decoration of furniture as the main evaluation indexes. Additionally, consumers’ furniture appearance indicators were analyzed by combining quantitative and qualitative research methods. Satisfaction analysis (attitude index) of color, shape, material, style, and surface decoration of furniture for different consumers’ age, education level, and gender. Finally, consumers’ psychological and perceptual preferences were analyzed based on the correlation between indicators to form product imagery. This study can guide the appearance design of furniture and avoid design blindness, thus reducing the design risk
Fabrication of Polygonatum cyrtonema Hua Flavonoid-AgNPs and its PLA Composite Active Film for Extending the Shelf Life of Frozen Litchi
No full textThis study presents an eco-friendly strategy to valorize Polygonatum cryptonym Hua flavonoids (PC) from the residues of polysaccharide extraction by synthesizing silver nanoparticles (PC-AgNPs) with enhanced bioactivity. Optimized synthesis (pH 7.5, 10 mM Ag⁺, 55 °C, 30 min) yielded monodisperse, spherical PC-AgNPs (avg. 16.2 nm) with face-centered cubic crystal structure. Nanoparticles showed remarkable scavenging ability for DPPH free radical (SC₅₀ = 2.61 µg/mL) and ABTS free radical (SC₅₀ = 1.65 µg/mL) compared to the native PC samples. The PC-AgNPs were incorporated into polylactic acid (PLA) films (1% w/w), achieving superior mechanical performance (tensile strength: 54.6 MPa; elongation at break: 6.0%) while demonstrating broad-spectrum antimicrobial activity against E. coli, S. aureus, and A. niger. Mechanistic studies revealed that the nanocomposite film disrupted bacterial membrane integrity in E. coli. Applied to litchi preservation at -18°C, the 1%NPs/PLA coating effectively maintained mitochondrial enzyme activities (Succinate dehydrogenase, Cytochrome c oxidase, H⁺-ATPase, Ca²⁺-ATPase) at more than 80% of fresh fruit levels for a certain storage life, significantly delaying senescence compared to controls. These findings establish PC-AgNPs/PLA as a dual-functional active packaging material that synergistically combines antioxidant reinforcement, antimicrobial protection, and physiological regulation for postharvest fruit preservation
Dimensional Changes of Cross-Laminated Timber Basement Walls Under Ambient Humidity Variation
No full textAdvancements in cross-laminated timber (CLT) applications have introduced the potential to use it as an alternative to reinforced concrete in basement construction. Understanding dimensional stability is crucial to ensure the reliability and safety of CLT in below-grade environments. An experimental CLT basement was constructed in Edmonton, Canada, and monitored over a period of two years. Field measurements were analyzed to estimate the dimensional changes and understand the deformation modes of the CLT panels resulting from changes in boundary conditions. A supporting laboratory experiment with specimens made from single pieces of dimensional lumber was conducted to establish a basis for comparing field-measured dimensional changes in CLT and determining the effects of cross-lamination on swelling and shrinkage coefficients. The average swelling and shrinkage coefficients calculated for CLT were approximately twice as large as the longitudinal and 20 times smaller than the transverse coefficients obtained from the laboratory experiments on solid wood specimens, indicating the influence of cross-lamination on these coefficients. Four deformation modes were identified based on measurements from field-installed strain gauges. The study provides new insights into the impact of water ingress on the swelling coefficient and the effects of different drying conditions on the shrinkage coefficients of CLT