Learn More
Twenty-seven diterpenes of six chemical classes, including seven new diterpenes (1, 2, 6, 10, 11, 16, and 19), have been isolated from a collection of the brown alga Dictyota plectens from the South China Sea. The structures of the new diterpenes were elucidated by extensive spectroscopic analysis and by comparison with reported data. In the in vitro(More)
Science popularization level evaluation contributes to measuring science popularization effect. An evaluation method for science popularization level based on analytic hierarchy process (AHP) and grey relational analysis (GRA) is proposed in this paper. 6 first-level evaluation indexes including science popularization personnel, science popularization(More)
Four new xenicanes, namely 4α-hydroxyisodictyohemiacetal (1), 4α-hydroxyisodictyoacetal (2), 13,18-diacetoxy-4-hydroxyisodictyo-19-al (3), and 4α-hydroxypachylactone (8), were isolated from a Chinese collection of the brown alga Dictyota plectens, along with four known analogues (4-7). The structures of the new diterpenes were determined by extensive(More)
In order to study the effect of temperature, irradiance, and salinity on the asexual reproduction of Caulerpa lentillifera, we conducted the indoor culture to study these factor effects on the regeneration of C. lentillifera, together with the measurement of photosynthetic parameters such as chlorophyll content, fluorescence characteristics, and rbcL(More)
The tropical to warm-temperate marine brown macroalgal genus Lobophora (Dictyotales, Phaeophyceae) recently drew attention because of its striking regional diversity. In this study we reassess Lobophora global species diversity, and species distributions, and explore how historical factors have shaped current diversity patterns. We applied a series of(More)
Crude polysaccharides from Costaria costata were extracted by hot water and further fractionated by anion exchange chromatography into three polysaccharide fractions. Three low molecular weight fragments were then prepared by degradation of the polysaccharides with hydrogen peroxide and ascorbic acid. The structural features of the polysaccharides and their(More)
  • 1