Tropical Marine-Algae. VI. New Monoterpenes From Several Collections of Chondrococcus hornemannii (Rhodophyta, Gigartinales, Rizophyllidaceae)

1989 ◽  
Vol 42 (11) ◽  
pp. 1983 ◽  
Author(s):  
JC Coll ◽  
AD Wright
Keyword(s):  
Red Algae ◽  
Positional Isomer ◽  
High Field ◽  
Marine Algae ◽  
Circumstantial Evidence ◽  
New Metabolites

Four collections of the red algae Chondrococcus hornemannii( Lyngbye ) Schmitz afforded a range of monoterpenes. Structures of ten new metabolites were elucidated by using high- field n.m.r. spectroscopy techniques including 2.D proton-carbon correlation experiments. The new monoterpenes were: (Z)-3-bromo-8-chloro-6-chloromethyl-2-methylocta-1,6-diene (9,6-hydroxymethyl-2-methylocta-2,8-dien-6-ol (6), (Z)-6-hydroxymethyl-2-methylocta-1,6-diene- 3,8-diol (7), (2)-6-hydroxymethyl-2-methyIocta-2,6-dien-8-ol (8), (2)-8-chloro-6-chloromethyl-3- methoxyocta-1,6-diene (9), (Z)-8-chloso-6-chloromethyl-2-methylocta-l,6-dien-3-ol (10), (2E,62) 8-chloro-6-chloromethyl-1-methoxy-2-methylocta-2,6-diene (11), (2E,6Z)-8-chloro-6-chloromethyl- 2-methylocta-2,6-dien-1-ol (12), (Z)-6-chloromethyl-3,8-dimethoxy-2-methylocta-1,6-diene (13) and its positional isomer (Z)-6-chloromethyl-1,8-dimethoxy-2-methyoca-26-diene (14). Although it is possible that some of the metabolites listed may be artefacts of extraction, circumstantial evidence is offered which suggests that most isolates were present in the plant prior to extraction.

scholarly journals Trichilones A–E: New Limonoids from Trichilia adolfi

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3070
Author(s):  
Mariela Gonzalez-Ramirez ◽  
Ivan Limachi ◽  
Sophie Manner ◽  
Juan C. Ticona ◽  
Efrain Salamanca ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nmr Spectroscopy ◽  
High Field ◽  
Chemical Constituents ◽  
Ethanol Extract ◽  
Raw 264.7 Cells ◽  
Raw 264.7 ◽  
Murine Macrophage ◽  
New Metabolites

In addition to the trichilianones A–D recently reported from Trichilia adolfi, a continuing investigation of the chemical constituents of the ethanol extract of the bark of this medicinal plant yielded the five new limonoids 1–5. They are characterized by having four fused rings and are new examples of prieurianin-type limonoids, having a ε-lactone which in 4 and 5 is α, β- unsaturated. The structures of the isolated metabolites were determined by high field NMR spectroscopy and HR mass spectrometry. The new metabolites were shown to have the ε-lactone fused with a tetrahydrofuran ring which is connected to an oxidized hexane ring joined with a cyclo-pentanone having a 3-furanyl substituent. As the crude extract possesses antileishmanial activity, the compounds were assayed for cytotoxic and antiparasitic activities in vitro in murine macrophage cells (raw 264.7 cells) and in Leishmania amazoniensis as well as L. braziliensis promastigotes. Metabolites 1–3 and 5 showed moderate cytotoxicity (between 30–94 µg/mL) but are not responsible for the antileishmanial effect of the extract.

New species of marine algae from California

1968 ◽  
Vol 46 (10) ◽  
pp. 1235-1251 ◽  
Author(s):  
George J. Hollenberg ◽  
Isabella A. Abbott
Keyword(s):  
New Species ◽  
New Taxa ◽  
Red Algae ◽  
Marine Algae ◽  
The Other ◽  
New Family ◽  
New Varieties ◽  
First Time

Eleven new taxa are described from California; two species, in addition, have new varieties added to them; and two species are given new circumscriptions to include a number of entities previously known under other names. New species are described in Percursaria (Chlorophyta), in Feldmannia (Phaeophyta), and in eight genera (Membranella, Porphyra, Rhododiscus, Peyssonelia, Prionitis, Blinksia, Besa and Rhodoglossum) of Rhodophyta. Two monotypic genera of Rhodophyta are described for the first time. One, Membranella nitens, is added to the Bangiales, and the other, Blinksia californica, is the type for a new family, the Blinksiaceae (Gigartinales). Half of the species of red algae are crustose non-corallinaceous species.

NEW SPECIES AND NEW COMBINATIONS OF MARINE ALGAE FROM THE REGION OF MONTEREY, CALIFORNIA

1965 ◽  
Vol 43 (10) ◽  
pp. 1177-1188 ◽  
Author(s):  
George J. Hollenberg ◽  
Isabella A. Abbott
Keyword(s):  
New Species ◽  
Red Algae ◽  
Brown Alga ◽  
Marine Algae ◽  
New Combinations ◽  
New Variety ◽  
Made In

Eight new species of marine algae, and one new variety, are described from the region of Monterey, California. One of them is a brown alga; the rest are red algae. New species are added to the genera Coilodesme, Peyssonelia, Rhodophysema, Halymenia, Kallymenia, Rhodymenia, Nitophyllum, and Laurencia. A new variety of Botryoglossum is proposed. Three of the new species are intertidal and the remaining species are subtidal. New combinations are made in the genera Pseudogloiophloea, Gelidium, and Iridaea.

scholarly journals AMPLIFIKASI GEN 16S-rRNA BAKTERI EPIFIT PADA ALGA MERAH Kappaphycus alvarezii

2020 ◽  
Vol 8 (1) ◽  
pp. 116
Author(s):  
Rico Rico Taareluan ◽  
Letha L Wantania ◽  
Elvy L Ginting ◽  
Remy E.P. Mangindaan ◽  
Deislie R.H. Kumampung ◽  
...  
Keyword(s):  
16S Rrna ◽  
Red Algae ◽  
Marine Algae ◽  
Kappaphycus Alvarezii ◽  
Algal Species ◽  
Nutrient Broth ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
Rrna Gene ◽  
Epiphytic Bacteria

Bacteria are microscopic organism found living in marine algae.  So far, species of bacteria in marine algae are not well known.  In this study, epiphytic bacteria in algal species of Kappaphycus alvarezii (red algae) were isolated to amplify their 16S-rRNA gene. Sample K.alvarezii was collected from the island of Nain.  The isolated epiphytic bacteria from the red algae K.alvarezii were grown in Nutrient Broth (NB) media.  DNA extraction was carried out using InnuPREP DNA Mini Kit.  16SrRNA genes was performed using primer pair of 8F and 1492R. Two different character of epiphytic bacteria were successfully isolated from K. alvarezii.  16S-rRNA genes from the two isolates was successfully amplified, indicated by the presence of DNA band in each sample gel electrophoreses at around 1500 bp.Keywords : Amplification, 16S-rRNA Genes, Kappapchycus alvarezii, Bacterial, Epiphytic  Abstrak Bakteri adalah organisme mikroskopis yang ditemukan hidup di alga laut. Sejauh ini, spesies bakteri di alga laut belum dikenal. Dalam penelitian ini, bakteri epifit pada spesies alga Kappaphycus alvarezii (alga merah) diisolasi untuk memperkuat gen 16S-rRNA mereka. Sampel K.alvarezii dikumpulkan dari pulau Nain. Bakteri epifit terisolasi dari alga merah K.alvarezii ditanam dalam media Nutrient Broth (NB). Ekstraksi DNA dilakukan dengan menggunakan InnuPREP DNA Mini Kit. Gen 16S-rRNA dilakukan dengan menggunakan pasangan primer 8F dan 1492R. Dua karakter bakteri epifit yang berbeda berhasil diisolasi dari K. alvarezii. Gen 16S-rRNA dari dua isolat berhasil diamplifikasi, ditunjukkan oleh adanya pita DNA pada setiap sampel gel elektroforesis sekitar 1500 bp. Kata Kunci: Amplifikasi, gen 16S-rRNA, Kappapycus alvarezii, Bakteri, Epifit

Studies of Australian Soft Corals. XLVII. New Halogenated Briaran Diterpenes From a Briareum Species (Octocorallia, Gorgonacea)

1989 ◽  
Vol 42 (10) ◽  
pp. 1727 ◽  
Author(s):  
BF Bowden ◽  
JC Coll ◽  
IM Vasilescu ◽  
PN Alderslade
Keyword(s):  
High Field ◽  
Soft Corals ◽  
Difference Spectroscopy ◽  
New Metabolites

Two new halogenated briaran diterpenes (3) and (4) are reported from a Briareumspecies of soft corals from waters off Darwin, N.T. Their structures were determined by high-field n.m.r. spectroscopy including 2-D 13C-1 H-correlation experiments and COSY-45 experiments, and stereochemical features were delineated by n.0.e. difference spectroscopy. The new metabolites are (1R*,2S*,4S*,6S*,7R',8R*,9S*,10S*,11Z,14S*,17S*)-14-acetoxy-6-chloro-4,8-epoxy-9,17-dihydroxy-2-propiony10xybriar5(16,11-dien-18-one (3) and (1R*,2R*,3S*,6S*,7R*,8R*,9S*,10S*,11R*,13Z)-3,9-diacetoxy-6-chloro-8-hydroxy-2-propionyloxybriara-5(16),13-diene-12,18-dione (4). The isolation of briaran diterpenes from this specimen supports its inclusion in the genus Briareum.

The marine algae of British Columbia and northern Washington: division Rhodophyta (red algae), class Rhodophyceae, order Rhodymeniales

1986 ◽  
Vol 64 (8) ◽  
pp. 1549-1580 ◽  
Author(s):  
Michael W. Hawkes ◽  
Robert F. Scagel
Keyword(s):  
British Columbia ◽  
Red Algae ◽  
Life Histories ◽  
Marine Algae ◽  
Morphological Variability ◽  
The Other ◽  
Historical Background ◽  
Type Specimens ◽  
California Flora ◽  
Floristic Treatment

This is a floristic treatment of benthic marine red algae (Rhodophyta) in the order Rhodymeniales which occur in British Columbia and northern Washington. The following 12 species in 9 genera are recorded and illustrated: Botryocladia pseudodichotoma (Farlow) Kylin, Fauchea fryeana Setchell, Fauchea laciniata J. G. Agardh, Faucheocolax attenuata Setchell, Fryeella gardneri (Setchell) Kylin, Gastroclonium subarticulatum (Turner) Kützing, Lomentaria hakodatensis Yendo, Minium parvum Moe, Rhodymenia californica Kylin, Rhodymenia pacifica Kylin, Rhodymenia pertusa (Postels et Ruprecht) J. Agardh, and Rhodymeniocolax botryoidea Setchell. Rhodymenia stipitata Kylin is treated as a taxonomic synonym of Rhodymenia pertusa. Previous reports of Coeloseira parva Hollenberg from British Columbia and Leptofauchea auricularis Dawson and Leptofauchea pacifica Dawson from northern Washington were based on misidentifications or could not be confirmed. Also provided is a historical background of the Rhodymeniales. Keys to and descriptions of local taxa (at the ordinal, familial, and generic levels), as well as information on synonyms, location of type specimens, type localities, and what is known about the life histories, distribution, seasonality, and habitats of all local taxa, are provided. Rhodymenialean species occurring in British Columbia and northern Washington which are also reported in the California flora are listed, as are those which are restricted to one or the other flora. References are given and representative specimens cited that document our concepts of the taxa and their morphological variability, seasonality, and geographical distributions.

scholarly journals PHOTOSYNTHETIC ACTION SPECTRA OF MARINE ALGAE

1950 ◽  
Vol 33 (4) ◽  
pp. 389-422 ◽  
Author(s):  
F. T. Haxo ◽  
L. R. Blinks
Keyword(s):  
Absorption Spectra ◽  
Green Algae ◽  
Red Algae ◽  
Marine Algae ◽  
Monochromatic Light ◽  
Action Spectrum ◽  
Water Soluble ◽  
Good Correspondence ◽  
Oxygen Determination ◽  
Action Spectra

A polarographic oxygen determination, with tissue in direct contact with a stationary platinum electrode, has been used to measure the photosynthetic response of marine algae. These were exposed to monochromatic light, of equal energy, at some 35 points through the visible spectrum (derived from a monochromator). Ulva and Monostroma (green algae) show action spectra which correspond very closely to their absorption spectra. Coilodesme (a brown alga) shows almost as good correspondence, including the spectral region absorbed by the carotenoid, fucoxanthin. In green and brown algae, light absorbed by both chlorophyll and carotenoids seems photosynthetically effective, although some inactive absorption by carotenoids is indicated. Action spectra for a wide variety of red algae, however, show marked deviations from their corresponding absorption spectra. The photosynthetic rates are high in the spectral regions absorbed by the water-soluble "phycobilin" pigments (phycoerythrin and phycocyanin), while the light absorbed by chlorophyll and carotenoids is poorly utilized for oxygen production. In red algae containing chiefly phycoerythrin, the action spectrum closely resembles that of the water-extracted pigment, with peaks corresponding to its absorption maxima (495, 540, and 565 mµ). Such algae include Delesseria, Schizymenia, and Porphyrella. In the genus Porphyra, there is a series P. nereocystis, P. naiadum, and P. perforata, with increasingly more phycocyanin and less phycoerythrin: the action spectra reflect this, with increasing activity in the orange-red region (600 to 640 mµ) where phycocyanin absorbs. In all these red algae, photosynthesis is almost minimal at 435 mµ and 675 mµ, where chlorophyll shows maximum absorption. Although the chlorophylls (and carotenoids) are present in quantities comparable to the green algae, their function is apparently not that of a primary light absorber; this role is taken over by the phycobilins. In this respect the red algae (Rhodophyta) appear unique among photosynthetic plants.

Tropical Marine Algae. V. The Structure Determination of Two Novel Sesquiterpenes From the Red Alga Laurencia tenera (Rhodophyceae, Ceramiales, Rhodomelaceae)

1989 ◽  
Vol 42 (10) ◽  
pp. 1695 ◽  
Author(s):  
JC Coll ◽  
BW Skelton ◽  
AH White ◽  
AD Wright
Keyword(s):  
Single Crystal ◽  
Structure Determination ◽  
High Field ◽  
Marine Algae ◽  
Red Alga ◽  
X Ray Diffraction ◽  
X Ray

Laurencia tenera has been shown to contain two novel sesquiterpenes. The structure of the less abundant metabolite (3) was determined by single-crystal X-ray diffraction as (1S,2R,4S,5R,6R,8S,9R)-4,8-dibromo-2,5,6,9-tetramethyltricyclo[7.2.0.01.6] undecane-3-one.‡ The more abundant, but less stable metabolite (4) was investigated by extensive high-field N.M.R. spectroscopy. Its structure is proposed as (1S*,2R*,4R*,5R*,6R*,8R*)-4-bromo-2,5,6-trimethyl-11-methylenetricyclo[6.2.1.01.6]undecan-3-one.§ The sesquiterpene (3) is isomeric with the known metabolite perforatone (5).

Tropical Marine Algae. IV. Novel Metabolites From the Red Alga Laurencia implicata (Rhodophyta, Rhodophyceae, Ceramiales, Rhodomelaceae)

1989 ◽  
Vol 42 (10) ◽  
pp. 1685 ◽  
Author(s):  
JC Coll ◽  
AD Wright
Keyword(s):  
Chlorine Atom ◽  
High Field ◽  
Marine Algae ◽  
Marine Alga ◽  
Red Alga ◽  
Structural Elucidation ◽  
Hydroxy Derivative

The marine alga Laurencia implicata afforded four new C15-lipid' type metabolites: (3Z,6Z,9Z)-12-bromo-5,13-epoxypentadeca-3,6,9-trien-1-yne (6) with an unprecedented 1-oxacyclodecane ring, (3Z,6Z,92)-13-bromo-5,12-epoxypentadeca-3,6,9-trien-1-yne (7) with a nine-membered ether ring, (3E,6S,7S,9S,10S,12S,13R)-10,12-dibromo-6,9:7,13-bisepoxy-pentadec-3-en-l-yne (8), in which a chlorine atom in the known compound chlorofucin (9) has been replaced by bromine, (1R*,4R*,6S*,7S*)-9-acetoxy-1,10,12-tribromo-4,7:6,13-bisepoxypentadeca-1,2-diene (11) and the closely related known metabolite neolaurallene (10). In addition, a brominated sesquiterpene (1'R*,3′R*)-2-(3?-bromo-1′,2′,2′-trimethylcyclopentyl-5-methylphenol (14), The 2′-hydroxy derivative of α- bromocuparene (15), was identified. Structural elucidation of all metabolites was based on high-field n.m.r. studies and comparison with known metabolites.

Studies of Australian Soft Corals. XLII. Structure Determination of New Briaran Derivatives From Briareum steckei (Coelenterata, Octocorallia, Gorgonacea)

1987 ◽  
Vol 40 (12) ◽  
pp. 2085 ◽  
Author(s):  
BF Bowden ◽  
JC Coll ◽  
W Patalinghug ◽  
BW Skelton ◽  
I Vasilescu ◽  
...  
Keyword(s):  
Single Crystal ◽  
High Field ◽  
Soft Corals ◽  
X Ray ◽  
Relative Stereochemistry ◽  
Minor Metabolite ◽  
A Minor ◽  
New Compounds ◽  
New Metabolites

The structure and relative stereochemistry of four new metabolites from Briareum steckei has been deduced from 2D-n.m.r. experiments at high field, and confirmed by a single-crystal X-ray determination of a minor metabolite. The new compounds are non-halogenated briaran derivatives: (1R*,2S*,3R*,5Z,7S*,8(17)Z,l0R*, llR *,12S*,14S*)- 3,14-diacetoxy- 11,12-epoxy- 18-oxobriara-5,8(17)-dien-2-yl butanoate (3), its 3-deacetoxy derivative (4), (1R*,2R*,4R*,5Z,7S*,8(17)Z,10R*, 11R *,12S*,14S*)-4,14-diacetoxy-11,12-epoxy-18-oxobriara-5,8(17)-dien-2-yl butanoate (5) and the related 2-propanoate (6). Single-crystal X-ray determinations were performed on (5) and (6).

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