Four new lignans, 3',4'-O,O-demethylenehinokinin (1), chamalignolide (2), 8'beta-hydroxyhinokinin (3) and 7beta,8beta-epoxyzuonin A (4), as well as (-)-hinokinin (5), and (-)-zuonin A (6), were isolated from the heartwood of Chamaecyparis obtusa var. formosana. The structures of these lignans were unambiguously determined by spectroscopic methods. And the absolute configuration of 1 was elucida...

Muurola-4,10(14)-dien-3-one (1), 10-O-acetyl-15-oxo-alpha-cadinol (2), 15-hydroxy-alpha-cadinol (3), 4alpha-hydroxy-5beta-ethoxy-epi-cubenol (4), and 4alpha-hydroxy-5beta-acetoxy-epi-cubenol (5), five new bicyclic sesquiterpenes, have been isolated from the heartwood of Chamaecyparis obtusa var. formosana along with the known compounds epi-cubenol, T-cadinol, T-muurolol, delta-cadinol, and alph...

The novel skeleton compounds, chamaecypanone C (3) and obtunorlignan A (4) were isolated from the heartwood of Chamaecyparis obtusa var. formosana. The structure of 3 was elucidated as a dimeric of monoterpene and norlignan with tricyclo[5.2.2.0]undecane and the structure of 4 was elucidated as a norlignan skeleton by spectroscopic methods. Compound 3 exhibits potent cytotoxic activity against ...

A new species of the genus Paracaprella is described based on the specimens associated with the algae Sargassum cymosum and Laurencia obtusa that were collected from infralittoral depths (0.5 to 3.0 m) at Sepultura Beach, Bombinhas and Paciência Beach, Penha, Santa Catarina State, Brazil. This new species differs from the others of the genus by the unique morphology of the males' gnathopod 2: i...

Examination of type material for Ulnaria splendens, aequalis and obtusa provides evidence to support each as a distinct definable taxon. None can be considered more closely related any other species in the genus are therefore all recognised at same rank, that species. We briefly discuss five further taxa involve name Synedra splendens: splendens var. marina, salina, brevis, subspathulata (ulna ...

Seaweeds are becoming a viable source of biologically active composites with hopeful application as nutraceuticals, functional food components, and medicinal agents. In the present study, antioxidant capacity biochemical compositions four seaweeds; Polycladia indica Turbinaria ornata (Phaeophyceae) Laurencia obtusa Sarconema scinaioides (Rhodophyceae), were estimated. The results indicated that...

Here we summarize the results from 10 cruises in Chukchi Sea, August, each year 2011 to 2020. Samples for qualitative analysis of microzooplankton were obtained stations located across Sea using a 20μm plankton net. Conditions encountered, terms sea ice coverage and chlorophyll concentrations, varied widely without any obvious relationship with composition assemblage. Examining total 242 sample...