高橋, 嘉典

大村, 隆秀

ISHII, Hiroshi

YANOSHITA, Yoshikatsu

TAKAHASHI, Yoshisuke

OMURA, Takahide

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.