The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The cuttings from some old Eucalyptus trees have inferior ability to root, leading to difficulties to multiply plus or elite clones from them. The main cause for this phenomenon is attributed to polyphenols contained in those trees. In the present study, polyphenols contained in E. camaldulensis cuttings or dissolved in water after scission of the cutting shoots were identified and quantified to clarify...
Eucalyptus is one of the major plantation species for pulp wood in many countries. It is of importance to breed trees possessing high pulp yield and quality for the management of pulpwood forests. The selection of elite trees based on their quality has become increasingly significant from both environment issues and the reduction of pulp cost, especially for plantations with short rotations...
Acacia species are widely used for raw materials of papers [1]. However, fatty acid components remaining in paper often cause the paper slide on a printer drum. For this reason, rapid characterization of total fatty acid components in wood is required for the selective tree breeding of Acacia species with less fatty acid content.
Remarakable progress in microscopic techniques from the 1950’s to the 1960’s enabled plant anatomists to clearly describe the fine structure of the wood cell wall. Nowadays, it is our common knowledge that each lamella can be approximated by a “two-phase structure”, i.e. the reinforcing element of cellulose microfibril (CMF) and the matrix (MT) substance of lignin-hemicellulose compound. However,...
In lignin structural analysis, 1H-nuclear magnetic resonance (NMR) spectroscopy is frequently applied using dehydrogenative polymer (DHP) [1]. However, this technique has a disadvantage of long measurement time. On the contrast, Fourier transform (FT) Raman spectroscopy has an advantage of short measurement time and gives the information on various molecule structures similar to NMR. However, peak...
The concentration of atmospheric carbon dioxide is increasing and becoming a major problem. After the Kyoto protocol, afforestation is gaining support as one of the best solutions to solve this problem. Creating forest resources which are valuable for industry is an important factor to sustain afforestation and to maintain healthy forests. The recycling of forest resources will become possible only...
Potassium ion (K+) is the most abundant cation inside prokaryotic and eukaryotic cells and the K+ transport system in biological membranes is essential for maintenance of membrane potential and diverse cellular processes in all organisms studied thus far. Bacterial K+ uptake systems have been investigated extensively. In E. coli, three kinds of K+ transporters have been identified as major K+ transport...
Many Eucalyptus plantations have been developed in the tropical and sub-tropical regions. Eucalyptus globulus is one of the fast-growing species planted in temperate regions and its normal rotation period is 8–10 years. It is suitable for kraft pulping because of its high pulp yield and the tree plantation is expected to solve the pulpwood supply shortage effectively in many regions in the world....
Often vessels have a major effect on causing the paper properties of Eucalyptus [1–3]. They are picked from the paper during printing, causing a non-uniform paper surface, which affects the distribution of ink [1]. Vessel morphology and frequency are important selection indices in the quality breeding program for pulp production. However, the most appropriate core-sampling position has not as yet...
Tree breeding has become more important as fixation sources of atmospheric CO2, since the global warming has been called a serious environmental problem. Therefore, the selection of elite trees possessing significant CO2 absorption ability together with excellent pulp properties is strongly needed to accelerate both atmospheric CO2 absorption and paper recycling rate since stronger papers can keep...
Woody plants develop special tissues, which are called reaction wood, on the inclined stems or branches. Tension wood, reaction wood for hardwoods, can be characterized by the presence of gelatinous (G) -fibers which contain a thickened cellulosic inner layer (G-layer) [1–3]. However, some species of primitive hardwoods have been reported to frequently lack of G-fibers [4–7]. No detailed information...
After the Kyoto Protocol, considerable attentions have been paid on forests in the context of climate change. Forests have a key role in balancing society’s need for wood-based products and protecting our environment by increasing net carbon sequestration in terrestrial carbon sinks removing atmospheric CO2. The sustainably managed forests area is 187 million ha in 2000 and gains 4.5 million ha/year...
Eucalyptus is one of the most widely utilized species for tree plantation, especially intended in the use for chemical pulp production [1]. E. globulus is a fast growing species in a moderate zone with an 8–10 year-rotation period [2]. The tree breeding programs are aiming to improve growth, pulp yield and strength in pulp and paper products because the elite tree selection contributes to...
Recently, physiological activity of phenolic compounds received significant attention; for example; antiproliferative effect on cancer cells has been reported in quercetin [1], which is contained in a bark of Eucalyptus species and in a propolis [2, 3]. However, the mechanism of phenolic compounds against cells is very complicate. Furthermore, screening of phenolic compounds is time-consuming because...
The quality breeding for high pulp yield and strength in the pulp production has attracted interest especially for Eucalyptus. The increment core method without cutting a tree is effective and efficient in the practical quality breeding program [1], but this is an indirect selection method that requires the prediction of whole-tree properties using clear implications between wood and pulp properties...
The principle of paper recycling is based on that the inter-fiber bonding can be broken by hydration to isolate individual pulp fiber; that is, the sheet forming using water is a reversible process. It is interrogative whether every aspect in recycling is reversible, preserving the level of paper-making properties. It is obvious that most of paper properties in strength are lowered by the re-use of...
Eucalyptus camaldulensis plays an important role as one of the major plantation species for pulpwood especially in sub-tropical regions. Tree selection for high pulp yield and strength in the management of pulpwood forests has attracted interest in the use of plantations with short term rotations to reduce the pulp cost and atmospheric CO2 [1]. The non-destructive method is preferable in...
Aucalyptus is a widely utilized species in tree plantation, especially intended for pulp production [1]. E. globulus is one of the fast growing species in tempertae zone with a rotation period of 8–10 years [2]. We have reported that chemithermomechanical pulp (CTMP) paper prepared from several individuals of E. globulus showed high brightness (about 70% ISO) with more than 85% pulp yield...
Acacia species are widely planted for pulp production in south-east Asian countries. It is well known that pulp properties strongly relate to cell morphology of wood [1–3]. In the present study, radial variation of cell morphology (diameter, wall thickness and length in vessel element and wood fiber, and volume of cell types) in two Acacia species (A. mangium and A. auriculiformis) and their...
It is an honor and pleasure for me to write the foreword of this book comprising the of Forest Resources for proceedings of the Fourth Symposium on the Improvement Recyclable Forest Products. The symposium was organized by Dr. Toshihiro Ona, Associate Professor at the Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, Japan, as part of the "Development of Forest...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.