Seasonal variation in the physical properties of agar and biomass of Gracilaria sp. (chorda type) from Tosa Bay, southern Japan
Seasonal variation in the physical properties of agar and biomass of Gracilaria sp. (chorda type) from Tosa Bay, southern Japan
复制标题
琼脂物理特性和江蓠生物量的季节性变化。
DOI：
10.1007/bf00049068
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发表时间：
1993
期刊：
影响因子：
2.6
通讯作者：
M. Ohno
中科院分区：
文献类型：
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作者：
A. Chirapart;M. Ohno
标题龙须菜属植物。在日本南部土佐湾的天之内湾沿岸沿着生长的脊索动物在夏季（26 °C至31 °C）和春季（15.1 °C至24.9 °C）的生物量最高。最大生物量在7月为6952 g m− 2，但在秋季（9月30.5 °C至11月20 °C）和冬季（12月19.5 °C至2月14.9 °C）逐渐下降。琼脂的产量和凝胶强度的变化取决于季节的时间。在三种不同温度（70、80和90 °C）下进行碱处理（5% NaOH，2 h）后，琼脂显示出基本上与商业级琼脂相同的凝胶强度，在80 °C下获得最佳凝胶。最大凝胶强度（1.5%琼脂凝胶的1455 g cm− 2）出现在冬季，此时生物量和琼脂产量较低。最低凝胶强度是在春季。凝胶强度与琼脂产量呈负相关，但与表观粘度呈正相关。最大粘度为40 cP。在十二月。凝胶温度，pH值的1.5%琼脂凝胶，和水分含量的琼脂表现出很小的变化。
Plants ofGracilariasp.(chordatype), which grow along the coast of Uranouchi Inlet in Tosa Bay, southern Japan, showed the highest biomass in the summer (26 °C to 31 °C) and spring season (15.1 °C to 24.9 °C). Maximum biomass was 6952 g m−2in July, but gradually decreased in the autumn (30.5 °C in September to 20 °C in November) and winter (19.5 °C in December to 14.9 °C in February). Variation in yields and gel strength of the agars, were shown to depend on the time in the season. After alkali treatment (5% NaOH, 2 h) at three different temperatures (70, 80, and 90 °C), the agars showed gel strengths essentially that of commercial grade agars, with the best gel obtained at 80 °C. Maximum gel strength (1455 g cm−2of 1.5% agar gel) occurred in winter when the biomass and agar yield were low. Minimum gel strength was in spring. Gel strength was inversely correlated with agar yield, but was positively correlated with apparent viscosity. Maximum viscosity was 40 cP. in December. Gelling temperatures, pH of 1.5% agar gel, and moisture content in agars showed little variation.
陶卡 T.：“维生素 D”Walter de Gruyter，342-343 (1988)
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