The photosynthetic oxygen evolution of Caulerpa serrulata was determined with oxygen electrodes. The effects of light and temperature on the growth and regeneration of fragmented C. serrulata thalli were analyzed. The regenerating rate and establishment of different sizes and portions of C. serrulata were studied. The results showed that the light saturation point of C. serrulata was 200 microm...

This paper reports a new method for the generation of chiral Lewis superacids by protonation of a non-Lewis acidic oxazaborolidine (1) with triflic acid. The resulting cationic species (3) are powerful and highly enantioselective catalysts for the Diels-Alder reaction of various 1,3-dienes with alpha,beta-enals. An optimization study (see Table 1) led to the selection of reaction conditions and...

The aqueous ethanol extract of Myricae Cortex (bark of Myrica rubra Sieb. et Zucc., Myricaceae) showed in vitro testosterone 5alpha-reductase inhibitory activity and in vivo anti-androgenic activity using growth of flank organ in castrated Syrian hamsters and/or hair regrowth after shaving in testosterone-treated C57Black/6CrSlc mice. Three constituents, myricanone, myricanol, and myricetin wer...

The antibacterial activity of the ethanolic and methanolic extracts from the mossEntodon nepalensis Mizush. was evaluated against three bacterial species. The antibacterial activity was assessed by well diffusion method. The ethanolic extract of plant showed a stronger effect than the methanolic extract. The maximum antagonistic effect showed against tested Escherichia coli followed by Salmonel...

The rapid synthesis of bicyclo[m.n.1]alkanone cores possessing quaternary carbon centers adjacent to a bridged ketone represents a significant synthetic challenge. This type of architectural feature is embedded in various complex biologically active compounds such as hyperforin and garsubellin A. Herein, we report a highly diastereoselective one-pot Diels-Alder reaction/Au(I)-catalyzed carbocyc...

Fresh leaves of Litsea glutinosa (Lour.) C. B. Rob. from Ha Tinh were steam distilled to produce an oil in 0.15% yield. The essential oil was analysis by a combination of capillary GC and GC/MS. Seventy eight compounds were detected in the oil, of which more than 95.18% were terpenoids. The major components were (E)-β-ocimene (13.35%), β-caryophyllene (27.20%) and bicyclogermacrene (18.16%). Ke...

The Anthelmintic activity of petroleum ether, methanol and chloroform extract of rhizomes of Nymphaea rubra Linn were evaluated separately and the activities were compared with that of Albendazole. The petroleum ether, ethanol and chloroform extract exhibited dose dependent activity. The ethanolic extract showed remarkable Anthelmintic activity.

We describe the design, synthesis and fluorescent profile of a family of environment-sensitive dyes in which a dimethylamino (donor) group is conjugated to a cyanoacrylate (acceptor) unit via a cyclopenta[b]naphthalene ring system. This assembly satisfies the typical D-π-A motif of a fluorescent molecular rotor and exhibits solvatochromic and viscosity-sensitive fluorescence emission. The centr...

accompanying forest species by nitrogen supply. The genus Alnus includes some fast-growing species adapted to various ecological situations (Martin, 1985). Genetic improvement programs are being developed to produce effective clonal varieties able to grow under various ecological conditions. Controlled hybridizations (intraspecific and interspecific) were carried out to obtain improved progenie...