WEKO3
アイテム
On the constancy of the amount of lignin : Statistical analysis and kinetic study on the aging of wood : Part 1 (A. NATURAL SCIENCE)
https://kpu.repo.nii.ac.jp/records/3445
https://kpu.repo.nii.ac.jp/records/3445e0ab0c36-8366-439a-aec4-9a23592c5aa6
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
KJ00000079310.pdf (1.7 MB)
|
|
| Item type | [ELS]紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-02-20 | |||||
| タイトル | ||||||
| タイトル | On the constancy of the amount of lignin : Statistical analysis and kinetic study on the aging of wood : Part 1 (A. NATURAL SCIENCE) | |||||
| 言語 | en | |||||
| その他（別言語等） | ||||||
| その他のタイトル | 木材の老化時に於けるリグニン量の不変性について : 古材に関する統計解析と反応速度論 (1)(A. 自然科学) | |||||
| 言語 | ja | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ | departmental bulletin paper | |||||
| 著者 |
岡本, 一
× 岡本, 一 |
|||||
| 抄録(英) | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | The analytical data on the woods aged at the ordinary temperature are examined by statistical method. The materials include the structural timbers of the ancient erection and the unearthed woods of various sources. At first the amount of lignin is assumed to be constant, then the assumption is tested. The results are as follows : 1) Two types of aging, named W-type and D-type, are capable of quantitative discrimination. The former is found in the wood in contact with water, mainly under the earth, and the latter is seen in the woods in dry environment. Under the intermediate humidity, woods might decay in a short period by the attack of microorganism which is out of the scope of this paper. The rapid degradation of cellulose and little or no alteration in the amount of the extractives are the characteristics of the W-type and a slow degradation of cellulose and remarkable increase in the extractives are the characteristics of the D-type. The numerical values of these characteristics are summarized in Tables 2.8 and 3.5,on the constant lignin basis. 2) The degradation of cellulosic substance and that of lignin during the aging of W-type are found to be first order with respect to the weight and for the degradation during the D-type aging the first order is only assumed. The loss in total weight of wood is estimated to be roughly equal to the loss in cellulose (W-type), or speculated to be in a range from zero to the amount equal to loss in cellulose (D-type). The estimate of the rate constant of the loss in lignin ranges from -20 to +5% of that in cellulose (W-type), or from -50 to +30% (D-type). Thus the difference between the apparent rate constant of loss in cellulosic substance on the constant lignin basis and the true one is within one-quater (W-type) or one-half (D-type) of the former. These systematic errors of the estimates are comparable to the accidental errors accompanied with the estimates. | |||||
| 書誌情報 |
京都府立大学学術報告. 理学及び家政学 en : The scientific reports of Kyoto Prefectural University. Natural science and living science 巻 3, 号 3, p. 29-50, 発行日 1961-09-25 |
|||||
| 雑誌書誌ID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00062297 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0075739X | |||||
