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題 名 | 臺灣錦葵科植物染色體之研究=Chromosome Study of the Malvaceae in Taiwan |
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作 者 | 鄭雅芳; 蔡進來; | 書刊名 | 林業研究季刊 |
卷 期 | 21:3 1999.09[民88.09] |
頁 次 | 頁61-72 |
分類號 | 377.2207 |
關鍵詞 | 錦葵科; 染色體; 核型分析; 臺灣; Malvaceae; Chromosome; Karyotype; Taiwan; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究乃探討由間苯二酚-甲醒樹脂(RF)、酚-間苯二酣-甲醛共聚合樹脂(PRF)、酚-間胺基酚-甲醛共聚合樹脂(PMAF)與相思樹(Acacia confusa Merr)、台灣二葉松(Pinus taiwanensis Hayata)之樹皮萃取物所製備之蜜月型膠合劑應用於集成材製造之可行性。所得重要結果歸納如下﹕RF、PRF、PMAF及六種蜜月型膠合劑應用於柳杉(Crypthmeria japonica Linn.)及柚木(Tectona grandisLinn.)集成材製造時,除PMAF者外,其餘各膠合劑所製作集成材均有良好之膠合強度。RF及PRF集成材之靜曲強度明顯較PMAF集成材高,蜜月型膠合劑所製作集成材之靜曲強度則與RF或PRF集成材相當。各不同膠合劑種類或集成材層數所製作柳杉集成材之靜曲強度均在CNS對針葉樹B類一級集成材所規定之350kgf/cm□以上,柚木集成材之靜曲強度則可達闊葉樹A類一級所要求之500kgf/cm□以上。蜜月型膠合劑之加壓時間縮短為8hr,對集成材之常態膠合強度無影響,但耐沸水返覆之膠合強度及其集成材之靜曲強度、彈性係數則降低。而薄葉金午時花及澎湖金午時花為最進步之種類。木瑾族的繖楊屬為較原始的類群,其外部形態特徵、染色體特徵、數目及核型組成均與其他各屬有極大的差異,故應將之提昇至族的地位較妥當。 |
英文摘要 | This study investigated the feasibility of laminated woods made with honeymoon adhesives prepared by resorcinol-formaldehyde resin(RF), phenol-resoreinol-forrnaldehyde copolymer resin(PRF), phenol-m-aminophenol-formaldehyde copolymer resin(PMAF) and bark extractives of Taiwan acacia (Acacia confusa Merr) and Taiwan red pine (Pinus taiwanensis Hayata). The results were summarized as follows: Japanese cedar (Cryptomeria japonica Linn.) and common teak (Tectona grandis Linn.) laminated woods made with RF, PRF, and six kinds of honeymoon adhesives had good bonding strength. The bending strength of laminated woods made with RF, PRIF and honeymoon adhesive were better than with PMAF. The bending strength of Japanese cedar laminated woods made with various adhesives and layer number exceeded 350 kgf/cm□ the requisite of CNS 11031 standard for first-class laminated wood made with B group of softwood. Common teak laminated woods exceeded 500 kgf/cm□, the requisite of CNS 11031 standard for first-class laminated wood made with A group of hardwood. There had no influence of the pressing time shorten to eight hours on the dry bonding strength of laminated woods made with honeymoon adhesives, but the bonding strength after repeated boiling water immersing, the bending strength and the modulus of elasticity decreased, types, respectively. Based on the karyotype characteristics, 86% of the chromosomes are assigned as M, m and sm types, which are more or less symmetrical for the two arms of the chromosomes, and are considered primitive for this family. The karyotypes of Sida are most primitive and Malvastrum are most derived. In the genus Sida, S. rhomboidea is the most primitive, whereas both S. mysorensis and S. veronicaefolia are most derived. In the tribe Hibisceae, Thespesia is the most primitive genus. Its morphological and chromosomal characteristics, chromosome number and the karyotype components are different from the other genera of its tribe. Therefore, it is appropriate to be removed from that tribe and treated as the tribe Thespesiceae. |
本系統中英文摘要資訊取自各篇刊載內容。