| シバの葉緑素およびキシロースの利用に関する研究. Studies on the Utilization of Chlorophylls and Xyloses in Lawn Grasses | |||||||||||||
Abstract | |||||||||||||
| 1.シバのクロロフィル含量の時期的変化についてしらべた結果, 7, 8月がその含量は約5%で最も多く, 11月には, ノシバ, コウライシバとも7月8月の半量程度に減少した.2.ノシバ, コウライシバの品種によるクロロフィル含量の差は認められない.3.-30℃での冷凍状態による貯蔵中クロロフィルは, 6ケ月間の長期にわたっても, はっきりした変化が認められない.4.30℃での貯蔵の場合には, 貯蔵開始後25時間で, クロロフィルaが約28%, クロロフィルbが約20%, 全クロロフィルが約25%減少した.5.ノシバ, コウライシバの7, 8, 9, 11月のキシラン含有率を測定した結果, 11月が最も多い含量を示した.葉緑素の利用と合せ考えると, 7月8月が利用度が高いと考えられる.6.ノシバの粗製キシランの抽出率, 回収率を測定した結果をアシおよび藁稈類のそれと比較すると, ほぼ匹敵する程度であった.7.葉緑素を抽出したシバの残渣のキシラン含有率は, 生のものから抽出したものとほとんど差のないことがわかった.8.粗製キシランの構成糖をガスクロマトグラフィーにより測定した結果, キシラン純度は70%以上で, 他にアラビノース, キシロース, ガラクトース等を含む.以上により, 7, 8月のシバから葉緑素を抽出利用し, その残渣からキシランを製造する方法が両者の利用上有効と思われる.. Studies on the Utilization of Chlorophylls and Xyloses in Lawn Grasses. C. SHIBANUMA, H. ISHII, Y. YANOSHITA, Y. TAKAHASHI and T. OMURA. Faculty of Horticulture, Chiba University, Matsudo, Japan. Tech. Bull. Fac. Hort. Chiba Univ., No.18: 47-52, 1970. From the results of examining seasonal variation of chlorophyll content of lawn grasses, it was shown that chlorophylls were most abundant in July and August, amounting to 50f fresh weight. In November chlorophyll content of noshiba and koraishiba decreased to about half amount in contrast to that in July and August. Difference in chlorophyll content between species, noshiba and koraishiba, was scarcely detected. Change of chlorophyll content in lawn grasses during storage period of six months on freezing condition (-30℃) was very little. In case of 30℃ storage, the content of chlorophyll a, b and total chlorophylls decreased by about 28%, 20 0x1091000853b05p-890nd 25% respectively after only 30 hrs. Estimating xylan content of noshiba and koraishiba, it was the largest in November in contrast to that in July and August. Comparing the results of separation percentage and recovery of crude xylans from noshiba with those of reeds, the former values were approximately equal to the latter. Separation of xylans from the residue after extracting showed no difference as compared with the results of separation from raw lawn grasses. According to gas chromatography of their methylated hydrolysate of crude xylan preparations, xylans in these preparation from noshiba and koraishiba were found to be more than 70-1229081253n purity, accompanied by arabinose, rhamnose, glucose, galactose and other sugars. Summarizing above results, we consider that separation of xylans from lawn grasses is recommendable on the stand point of utilization of both components. | |||||||||||||
Publication details | |||||||||||||
| |||||||||||||