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Sargassum hemiphyllum (Turner) C. Agardh is a common low intertidal brown alga in the northwestern Pacific, and two varieties (var. chinense and var. hemiphyllum) of this alga have been determined based on morphological and molecular data. In this study, we present the complete mitochondrial genome of S. hemiphyllum var. chinense. The circular-mapping S.(More)
The photosynthetic oxygen evolution characteristics were examined in both vegetative (blade) and sexual reproductive (receptacle) tissues of Sargassum henslowianum (Fucales, Phaeophyta) from the Shenao bay of Nanao Island, China, to establish the mechanism of photosynthetic acquisition of inorganic carbon (Ci) in this species. In natural seawater (pH 8.1,(More)
Desiccation has significant effects on photosynthetic processes in intertidal macro-algae. We studied an intertidal macro-alga, Ulva sp., which can tolerate desiccation, to investigate changes in photosynthetic performance and the components and structure of thylakoid membrane proteins in response to desiccation. Our results demonstrate that photosystem II(More)
Photosynthetic electron flow changed considerably during desiccation and re-hydration of the intertidal macroalgae Porphyra haitanensis. Activities of both photosystem (PSI) and photosystem (PSII) increased significantly at moderate desiccation levels. Whereas PSII activity was abolished at an absolute water content (AWC) <24 %, PSI remained active with(More)
The present study was designated to evaluate the antioxidant, antibacterial and antischistosomal activities of Grateloupia livida (GL) extracts in vitro. A GL Ethanol extract (EE) was separated into petroleum ether (PE), ethyl acetate (EA), n-butyl alcohol (BuOH) and aqueous (AQ) fractions to fractionate the polar and non-polar compounds in the EE. Extracts(More)
Purification, preliminary characterization and bioactivity of polysaccharides from Grateloupia livida (GL) were investigated. Three water-soluble sulfated polysaccharide fractions (GLP-1, GLP-2 and GLP-3) were isolated and purified from the edible and medicinal red seaweed, Grateloupia livida (Harv.) Yamada by DEAE Sepharose CL-6B and Sephadex G-100 column(More)
Gloiopeltis tenax (G. tenax) is widely distributed along the Chinese coastal areas and is commonly used in the treatment of diarrhea and colitis. This study aimed at investigating the bioactivities of the volatile constituents in G. tenax. We extracted the essential constituents of G. tenax by supercritical carbon dioxide extraction (CO₂-SFE), then(More)
The rhodophyte Gracilaria lemaneiformis is an important macroalga of great economic value, and is cultured on the southeastern coast of China. In this study, two G. lemaneiformis strains, 981 and 07–2, were cultured at three temperatures (25, 30 and 35 °C) for 48 h. Analysis of the physiological parameters of the two strains under the heat treatments showed(More)
Short-term exposure to cigarette smoke (CS) introduces an abundance of free radicals into the lungs, causing oxidative stress and inflammation. CS is an important risk factor related to the pathogenesis of several pulmonary diseases, especially chronic obstructive pulmonary disease. Black coral (BC) is a marine biomaterial commonly used for cigarette(More)
Black corals (BC) have been used for a long time in Chinese medicine, and may have some pharmaceutical functions when used as material for cigarette holders in southeast China. This study is aimed to investigate the bioactivities of volatile constituents in BC and to explore the folklore behind the use of BC cigarette holders (BCCHs). We extracted the(More)