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对南海长松藻(Codium cylindricum Holmes)的主要营养成分进行了分析,结果显示:多糖、蛋白质和粗纤维是构成藻体的主要营养成分,占藻体干基的80%左右,其中多糖占55.57%、粗纤维占11.09%、蛋白质占12.57%,但脂肪含量仅为0.59%。水溶性营养成分较为丰富,水浸出物总量为34.55%,其中包括水溶性蛋白、水溶性多糖、游离氨基酸等。多糖是长松藻的主要有效成分。单因素及正交实验结果表明:长松藻多糖提取的最佳工艺参数为浸提温度95℃,浸提时间1.5 h,料水质量比1∶50,多糖得率为9.79%。 相似文献
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M. Mugrauer M.M. Hohle C. Ginski M. Vanko F. Freistetter 《Astronomische Nachrichten》2009,330(5):425-429
We present follow‐up observations of comet 17/P Holmes after its extreme outburst in brightness, which occurred end of October 2007. We obtained 58 V‐band images of the comet between October 2007 and February 2008, using the Cassegrain‐Teleskop‐Kamera (CTK) at the University Observatory Jena. We present precise astrometry of the comet, which yields its most recent Keplerian orbital elements. Furthermore, we show that the comet's coma expands quite linearly with a velocity of about 1650 km/s between October and December 2007. The photometric monitoring of comet 17/P Holmes shows that its photometric activity level decreased by about 5.9 mag within 105 days after its outburst (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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采用PCR扩增的方法获得了第一个松藻目物种长松藻(Codium cylindricum)的ITS序列,长松藻ITS全长515bp,其中ITS1的长度为74bp,5.8S序列长163bp,ITS2的长度为278bp.与已知的绿藻门其它5个目8个属物种的ITS序列的系统发育分析结果表明,绿藻门物种分为三大支,其中团藻目藻类为一支,松藻目和刚毛藻目藻类为一支,石莼目、顶管藻目和丝藻目藻类构成一大支;长松藻与刚毛藻目的刚毛藻属和硬毛藻属物种同为多核藻体,在系统发生上表现出更近的亲缘关系;不同绿藻目海藻的聚类关系表明,其能够准确地反映出其在单核与多核、单细胞与多细胞等生物结构特性方面的差异与水平. 相似文献
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湛江海域6种常见经济海藻的营养成分分析 总被引：1，自引：0，他引：1
分析采自湛江海域的粗枝软骨藻Chondria crassicaulis、日本沙菜Hypnea japonica、鱼栖菜Acanthophora sp、芋根江蓠Gracilaria blodgettii、平卧松藻Codium repens、网地藻Dictyota dichotoma等6种经济海藻的营养成分。结果表明:碳水化合物是这些海藻的主要营养成分,占藻体干重的42.81%～66.11%,平均为55.93%;粗蛋白含量6.63%～11.13%;粗脂肪含量最低,除网地藻D.dichotoma(2.85%)外,其余5种皆不足藻体干重的1%;粗纤维和灰分含量在种间差别较大;矿物质含量丰富,其中磷、铁和锌分别在平卧松藻C.repens、网地藻D.dichotoma和鱼栖菜Acanthophora中占藻体干重的0.093%、0.13%和0.0055%;氨基酸含量较高,其中Thr、Val、Ile、Leu、Phe几种必需氨基酸的含量均高于FAO标准;不少种类中汞、镉、铅、砷等含量超出我国食品卫生标准。海藻体内的营养成分含量因海藻种类和生长海域的不同而有差异。 相似文献
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It has been widely recognized that biological invasion has become one of the greatest threats to the ecosystem.Codium fragile is an invasive species which exhibits a variety of attributes like parthenogenesis, winter fragment,and vegetative reproduction; and therefore, it has become a successful invader, colonizing most subtropical regions. In China’s southeast coastal aquaculture waters, the green algal bloom caused by C. fragile will probably become a serious problem. In order to understand mo... 相似文献
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《The Journal of geography》2012,111(5):487-494
Abstract Although geography is being revived in the K-12 curriculum, preservice teachers—candidates for the teaching profession—now in our universities are not universally reaping the benefits of cooperative efforts of geography and college of education faculty. Reform is appropriate in both camps. Colleges of education, influenced by many agents, including Certificate/licensing regulations, accrediting agencies, professional organizations, and a stream of reform movements, are bringing education to the level of a true profession. The dimensions of the reform underway and several key players offer great opportunities for geography education and for improving the general climate for teaching excellence in institutions of higher learning. Candidates for the new teaching profession and their education faculty are teaching and learning collaboratively, and conducting research in diverse school districts. Geographers have new reasons and new opportunities to participate in the education of the geography teachers of tomorrow. 相似文献
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P. Gronkowski 《Monthly notices of the Royal Astronomical Society》2009,397(2):883-889
The catastrophic thermodynamic destruction of large cometary heterogeneous grains lying on the surface of a comet nucleus is examined. The core–mantle grain-structure model is assumed. Grain fragmentation as an explanation of sudden changes in cometary brightness is proposed. The approach presented to the problem of cometary outbursts is a development of a previous author's paper. The proposed mechanism is based on the idea of thermodynamical destruction of heterogeneous cometary grains. Numerical simulations have been carried out for a wide range of values of physical characteristics of cometary material. The results obtained are consistent with observational data. The main conclusion of this paper is that thermodynamical fragmentation of large grains can explain variations in brightness and also outbursts of comets. 相似文献
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采用温和的聚丙烯酰胺凝胶电泳（PAGE）法，从管藻目录藻刺松藻中分离到不同解离程度的光系统I（PSI）复合物，以及核心复合物CCI、捕光复合物LHCI和LHCI的亚组分，并就其多肽组成及相互关系做了研究。纯化的CCI复合物只含有66和56kDa多肽，荧光发射主峰在714－715nm；LHCI的77K荧光峰在683－684nm，没有高等植物730nm特征荧光，含有PSI复合物中的全部4种24.7-27.5kDa多肽。将中心复合物CPI再电泳，得到了只含24．5和27．2kDa多肽的LHCI亚组分。从而证实刺松藻LHCI也可分裂为含有光合色素的两个部分，它们与CCI结合的紧密程度不同。 相似文献
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