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Isolation of a polysaccharide with antiviral effect from Ulva lactuca.
TLDR
The polysaccharide isolated from the green marine algae Ulva lactuca was studied for antiviral activity in vitro against a number of human and avian influenza viruses and showed considerable inhibition of the viral reproduction.
MOLECULAR STRUCTURAL STUDIES OF LICHEN SUBSTANCES WITH ANTIMICROBIAL, ANTIPROLIFERATIVE, AND CYTOTOXIC EFFECTS FROM Parmelia subrudecta
TLDR
These compounds showed activity against important gram-positive and gram-negative pathogens like mycobacteria and multiresistant staphylococci and is combined with antiproliferative activity and cytotoxicity.
Octadeca-8,11-dienoic Acid Methylester, a New Fatty Acid Metabolite from Fistulina hepatica
TLDR
A new fatty acid metabolite, octadeca-8,11-dienoic acid methylester 1 was isolated together with the known ergosterol from Fistulina hepatica, which displays no antimicrobial properties against Staphylococcus aureus, but very low activity against Esche­richia coli and Proteus vulgaris.
Bioactive Metabolites Produced by Microorganisms Collected in Antarctica and the Arctic
TLDR
This overview presents some of the most important secondary metabolites (antibiotics, alkaloids, high carbon amino acids, nitro compounds, diketopiperazines etc.) produced by Antarctic and Arctic microorganisms.
Isolation and Structure Elucidation of Tyramine and Indole Alkaloids from Antarctic Strain Microbispora Aerata IMBAS-11A
TLDR
The tyramine alkaloids as a N-acetyltyramine, N- acetyl-3-(phydroxyphenyl)-propylamine, and the indole alkaloid L, L-cyclo(tryptophanylprolyl) were isolated from the culture broth of Microbispora aerata subsp.IMBAS-11A.
Usnic Acid, Metabolite from Neuropogon Sp., An Antarctic Lichen Isolation, Structure Elucidation and Biological Activity
TLDR
The usnic acid was investigated for antimicrobial activity against pathogenic Gram-positive and Gram-negative bacteria as Streptococcus pyogenes 15346, Staphilococcus epidermidis 1093, Bacillus cereus 157, Listeria monocytogenes 981, Yersinia enterocolitica 013, Klebsiella pneumoniae 52145 and Salmonella thyphimurium.
[The effect of acetic acid and furfural on yeast growth].
TLDR
It was established that some yeast strains absorb acetic acid better at pH 4.0-5.0, while others--only at pH 6.0 and at different concentrations of the acid in the nutrient media.
Comparison of the Phytotoxic Effects of Usnic Acid on Cultures of Free-Living Alga Scenedesmus quadricauda and Aposymbiotically Grown Lichen Photobiont Trebouxia erici
TLDR
Higher tolerance to usnic acid in Trebouxia cultures may be an adaptation resulting from the long term co-evolution of these algae with fungi that produce secondary metabolites that regulate the balance between the photobiont and mycobionts forming thallus.
Diphenylether and Macrotriolides Occurring in a Fungal Isolate from the Antarctic Lichen Neuropogon
TLDR
Fermentation of this strain, extraction of the culture broth, and preparative separation of produced compounds furnished 4‐carboxy‐5,5′‐dihydroxy‐3,3′‐dimethyldiphenylether (1), macrosphelide A (2), and macroSphelide J (3).
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