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... Several types of apricot kernel cultivated in Syria were used in this study in order to clarify differences in their thermal and chemical properties. Chemical and thermal properties were monitored by FTIR, DSC, TGA techniques. Chemical analysis showed that all types of kernel shells from different sources possessed the same structure. However, the thin brown layer (skin) that covers the kernel had ...
... The aim of this work was to evaluate the chemical composition of some plantation wood and the assessment of their compatibility with plaster. A quantitative analysis of the chemical composition each of the species (Eucalyptus saligna, Cupressus lusitanica and Eucalyptus paniculata) was carried out, followed by chemical compatibility evaluation using different types of wood particles. The quantitat ...
... Densification of wood is a method to improve wood quality. However, its product namely densified wood, tends to return to the initial shape and size (spring back) if the fixation had not completed. This method will also result in the changes on wood anatomy structure. The aim of this research was to assess effect of various densification degrees at radial direction on recovery of set (RS) and anat ...
Eucalyptus; clones; plantations; reaction wood; sawing; trees; water content; wood
Abstract:
... Liberation of growth stresses during cutting and sawing prevents the use of eucalyptus as working timber. The occurrence of log-end cracks and planks, due to the release of growth stress pre-existing in the standing tree, causes severe damage at the early stage of wood transformation. In this study, we determine the GSI of two clonal eucalyptus wood originated from Gharb Mâamora plantations, so as ...
... Ceiba pentandra, a non-durable hardwood, is greatly patronized for plywood production. Urea–Formaldehyde (UF) adhesive-joints of plies are filled with toxic preservative-chemicals to extend their service-lives. These pose environmental anxieties. The strengths of C. pentandra ply glue-lines containing different concentrations of Erythrophleum suaveolens bark-extract/UF- and Fossect 88/UF-adhesives ...
... Histo-chemical and bio-chemical changes associated with all the stages of flowering of Dendrocalamus brandisii have been studied. Starch distribution along and across the culm-wall was assessed qualitatively and quantitatively using standard methods. The average starch content varies significantly among the different stages of the culm. The average starch content was lowest in after-flowering culm ...
... This study deals with the fabrication of three layer hybrid particleboard using kadam branch (Anthocephalus chinensis (Lam.) A. Rich ex Walp.) and dhaincha (Sesbania aculeata (Willd.)) as raw material with urea formaldehyde resin adhesive as 11% in the face and 9% in the core. Two types of particleboard i.e., dhaincha fine particles: face layer and kadam wood coarse particles:core layer (HB-A) and ...
Gracilaria verrucosa; Kappaphycus alvarezii; carrageenan; cellulose; ecosystems; exports; farms; forests; grasses; hemicellulose; industrial wastes; lignin; lignocellulose; macroalgae; manufacturing; marketing; medium density fiberboards; paper; raw materials; resins; straw; temperature; Asia; Europe
Abstract:
... The effort to conserve Indonesian forest has become the main development priority which is indispensable to maintain the ecosystem balance, as well as thrive to preserve the use of timber wisely. Some alternative products, such as a composite board, are ideal to be developed as the alternative of timber products, as they have a main advantage of having various non-timber waste as the raw materials ...
... This study was conducted to increase the knowledge of moisture-related distortion and damage in the field of wood-based lightweight panels. By increasing the possibilities of predicting moisture-related distortion and damage, the possibilities of using lightweight wood materials could increase. The study was performed through experiments and modelling work on a wooden panel product with numerous s ...
... Dry disk milling has been proven as a feasible mechanical process for obtaining finer particles. The milling was used to pulverize oven-heat untreated and treated oil palm empty fruit bunch (OPEFB) fibers into micro to nano-sized fibers. Scanning electron microscope, X-ray diffraction (XRD), particle size analyser, fourier transform-infrared spectroscopy, energy dispersive spectroscopy, and differ ...
... In this study the reinforcing effect of date palm and kenaf fibers on practical properties of plywood manufactured from horn beam wood (Carpinus betulus) was investigated. Two types of fibers consist of kenaf and date palm were hand-laid up between wood layers. Also, the effect of resin content (150 and 200 g/m²) was determined. The results showed that utilization of kenaf and date palm fibers was ...
Melia; adhesives; modulus of elasticity; modulus of rupture; plywood; progeny; shear strength; urea formaldehyde
Abstract:
... The present study investigated the suitability of thirteen different progenies of Melia composita for general purpose (interior grade) plywood. Plywood were prepared using urea formaldehyde adhesives and evaluated for their suitability for general purpose interior grade plywood. It was observed that the general purpose plywood (interior grade) made out of all the thirteen progenies meet the IS spe ...
... Gypsum boards had poor dimensional stability and mechanical properties compared to cement boards. To improve its properties, gypsum–cement boards reinforced with kenaf fibre bast using different gypsum/cement mixing ratios was fabricated in the current study. The results revealed that addition of cement generally improved the bending strength and compressive strength of the gypsum boards. Dimensio ...
... Supercritical carbon dioxide (SC-CO₂) as a carrier solvent is becoming an alternative and environmentally sound method in the preservative treatment of wood and wood-based products. The potential of this new method has never been explored for its suitability in manufacturing laminated bamboo products which are widely used as construction materials for either indoor or outdoor purposes. The current ...
bamboos; culms; shrinkage; specific gravity; vascular bundles; water content; India
Abstract:
... The present study was carried out on mature culms of three Schizostachyum species namely Schizostachyum manii, Schizostachyum munroi and Schizostachyum pergracile collected from Manipur. The aim of the present study was to investigate anatomical and physical properties of these bamboo species across and along the culms. All the selected species had different types of vascular bundles. Type I vascu ...
Eucalyptus; bagasse; bamboos; bark; bending strength; biomass; cellulose; durability; mixing; modulus of elasticity; modulus of rupture; ovens; particleboards; raw materials; urea formaldehyde; water content; wood
Abstract:
... The decrease of wood supply leads to find out the alternative raw material for particleboard production derived from non-woody cellulose materials, one of the promising material is sorghum bagasse. However, the strength properties of particleboard manufactured from this biomass tend to be low. This research was to evaluate physical, mechanical and durability properties of sorghum bagasse-particleb ...
... Annually, a large volume of medium density fiber board (MDF) wastes are generated which consists of used furniture and other constructed items, the parts obtained from trimming and edge cutting of boards in MDF producer factories and cutting of boards during conversion processes. In this study, changes in the chemical properties of wood fibers after hydrothermal recycling of MDF wastes as an impor ...
... Expensive adhesives and preservative-chemicals pose challenges to the wood composite industry. Adhesive-extenders reduce cost and enhance ply-joint bonding strength. Urea Formaldehyde (UF) extender was substituted with Milicia excelsa sawdust to formulate five extender-combinations: A (no sawdust), B (100% cassava flour); C (25% cassava flour, 75% sawdust); D (75% cassava flour, 25% sawdust); E (5 ...
fiber content; modulus of elasticity; ultrasonics; vibration; wood
Abstract:
... Dynamic modulus of elasticity (DMoE) of wood polymer composites, prepared with varying proportion of wood content, was determined using flexural vibration and ultrasonic pulse transit time methods. The DMoE was compared with the flexural modulus as measured by standard three point bending test. The elastic modulus of the composite increased with the increasing fiber content. Both vibration methods ...
Bambusa; bamboos; crushing; culms; modulus of elasticity; modulus of rupture
Abstract:
... Strength properties of round bamboo Bambusa striata were determined under static bending and compression parallel to grain tests in air dry and green conditions taking with node and without node at centre of the test specimens from bottom, middle & top portions of the culms. The results show that strength properties i.e. fibre stress at elastic limit (FS at EL), modulus of rupture (MoR), modulus o ...