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Volume 49, Issue 9
Displaying 1-13 of 13 articles from this issue
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Zhon Gzheng Lee1995 Volume 49 Issue 9 Pages 1279-1282
Published: September 01, 1995
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSThe paper production in People's Republic of China is ranked the third in the world, following U.S.A. and Japan. Its annual growth rate has been over ten percent during a decade. In order to meet increasing demand by 1.2 billion people, along with economic development in the country, problems such as raw material supply, facility modernization and environment preservation have to be overcome. Support from Japan and other countries are really expected.View full abstractDownload PDF (1819K) -
Dong-So Shin1995 Volume 49 Issue 9 Pages 1283-1289
Published: September 01, 1995
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSKorea is expanding its economy and is ranked 12 th in the world trade statistics. Industrialized countries in the world have developed their paper industries in a long history of 100-200 years. Korean paper industry, on the other hands, has been modernizing to be competitive in the world market in the very short period of 20-30 years. The problems to be solved for its growth are raw material supply, product quality improvement and competitiveness in the world market. Promoting research and development work is also needed.View full abstractDownload PDF (2312K) -
Motoko Komaki1995 Volume 49 Issue 9 Pages 1290-1298
Published: September 01, 1995
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSWhite is preferable color for Japanese. In this paper the color is considered from linguistic and psychological aspects. Historical and current states of using white goods in the life of our Japanese people are described. Moreover how to whiten textiles and evaluate the whiteness are also described. The preferred whiteness on clothes by Japanese, American and Korean people is clarified.View full abstractDownload PDF (1329K) -
Kiyoaki Iida1995 Volume 49 Issue 9 Pages 1299-1301
Published: September 01, 1995
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSThe American Forest and Paper Association published a report named “Agenda 2020” on November 22, 1994, which is a technology vision and research agenda for America's forest, wood and paper industry. Its executive summary is translated.View full abstractDownload PDF (578K) -
Takanori Miyanishi1995 Volume 49 Issue 9 Pages 1302-1309
Published: September 01, 1995
Released on J-STAGE: November 16, 2009
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Kohji Masamizu, Junta Egawa, Masaaki Hagiwara, Toshiyuki Ukigai1995 Volume 49 Issue 9 Pages 1310-1317
Published: September 01, 1995
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSPressure continues from both the public and private sectors to increase paper recycling in all high volume grades. In newsprint, the pressure is to increase recycled ONP from the current level of 40% to a higher value. Meanwhile, through the past decade, a shift is occurring from letterpress to offset printing. Offset press speed is increasing and better print quality is being achieved. These achievements have been attained using inks having greater ink-fiber adhesion.
To maintain pace with higher fiber bond strength inks, new deinking agents, high alcohol block copolymer types are entering the market. These block copolymers make it possible to increase brightness, reduce residual ink and ultimately produce high quality recycled paper.
The properties of the new high-alcohol EOPO block copolymer type and the results of a comparative analysis to the high-alcohol EO/PO random copolymer and fatty acid types are reported.View full abstractDownload PDF (1057K) -
Wood Science Committee1995 Volume 49 Issue 9 Pages 1318-1330
Published: September 01, 1995
Released on J-STAGE: November 16, 2009
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[in Japanese]1995 Volume 49 Issue 9 Pages 1331
Published: September 01, 1995
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSDownload PDF (1876K) -
Keiichi Tsuchikawa, Ryuichiro Kondo, Kokki Sakai1995 Volume 49 Issue 9 Pages 1332-1338
Published: September 01, 1995
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSConsiderable interest has focussed on a biobleaching of kraft pulp with white-rot fungi, since they are the only group of organisms known to be capable of preferential degradation of native lignins.
In this study, to establish a totally chlorine-free bleaching process, we applied a newly found active lignin-degrading strain, Phanerochaete sordida YK-624, to the delignification and brightening of hardwood unbleached kraft pulp. This fungus brightened the pulp and simultaneously decreased its Kappa number. By the combination of fungal treatment and alkaline extraction, the pulp was brightened to 80% brightness. The physical properties of fungal treated pulp were not so good as chemically bleached hardwood pulp (LBKP). However, the effect of polyacrylamide (PAM) on breaking length of the pulp obtained with fungal treatment was greater than the result of chemical bleached pulp, and the tear index of fungal treated pulp was recovered by adding some extent of softwood bleached pulp.View full abstractDownload PDF (2273K) -
Structural Analysis of Lignin by Pyrolysis-Gas Chromatography (III)Akiko Izumi, Ken-ichi Kuroda, Hiroshi Ohi, Akira Yamaguchi1995 Volume 49 Issue 9 Pages 1339-1346
Published: September 01, 1995
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSIn order to study the effectiveness of pyrolysis-gas chromatography (Py-GC) on the structural analysis of lignin, wood meals of 13 Japanese hardwood species were subjected to Py-GC and the results were compared with those of nitrobenzene oxidation. Thirteen compounds with guaiacyl nucleus were identified as pyrolysis products along with their syringyl analogues by comparing their retention times and mass spectra with those of authentic compounds. Quantitative analyses were performed by using the calibration factors which determined by quantitative gas chromatographic analysis of authentic compounds. Total yields of monomeric pyrolysis products were between 12.2 and 26.1% of Klason lignin and were found to be different among wood species. Total yields of vanillin (V) and syringaldehyde (S) obtained by nitrobenzene oxidation were between 31.7 and 43.9% of Klason lignin and were almost twice as large as those of the pyrolysis products. The ratios of syringyl type products to guaiacyl type products were in good agreement with the S/V molar ratios obtained by nitrobenzene oxidation. Accordingly, Py-GC is expected to be a time saving and convenient routine method for characterizing hardwood lignin because the method requires only small amount of samples and no preliminary chemical processing. However, accumulation of analyses data on the yields of pyrolysis monomers is still insufficient. Further studies using other hardwood species are considered to be necessary.View full abstractDownload PDF (1093K) -
Studies on Decision of Selection Indexes for Quality Breeding of Eucalypt Pulpwood (VI)Toshihiro Ona, Tetsuya Sonoda, Kazuya Ito, Masaru Shibata, Yutaka Tama ...1995 Volume 49 Issue 9 Pages 1347-1356
Published: September 01, 1995
Released on J-STAGE: February 09, 2010
JOURNAL FREE ACCESSThe relationship between wood and kraft pulp properties was examined using within-tree tree variation on two trees of E. camaldulensis grown in Western Australia. Many pulp properties were related to wood properties analysed by chemical determination of wood components and their structures, at 1% level of significance. Multiple regression analysis of pulp properties on wood properties revealed significant independent variables as follows :
1. Pulp yield : total-extractives content, arabinose and galactose mol.%.
2. Sheet density : total-extractives content, galactose mol.%, cellulose content/hemicellulose content.
3. Burst factor : xylose mol.%, total-extractives content.
4. Breaking length : xylose mol.%, lignin S/G ratio.
5. Tear factor : basic density, hemicellulose content.
6. Folding endurance : total-extractives content.
7. Unbleached brightness : total-extractives content, galactose and arabinose mol.%, hemicellulose content.
8. Kapper number : total-extractives content, arabinose mol.%, cellulose content/hemicellulose content.
Significant regression equations at 1% level were obtained for all pulp properties except tear factor (5% level). And we also look forward to applying them for prediction of whole-tree pulp properties by an increment core from the representative height without cutting a tree.View full abstractDownload PDF (2770K) -
1995 Volume 49 Issue 9 Pages 1357-1364
Published: September 01, 1995
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSDownload PDF (6170K) -
[in Japanese]1995 Volume 49 Issue 9 Pages 1386-1389
Published: September 01, 1995
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSDownload PDF (658K)
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