The influence of arsenate and phosphate levels in water on the formation of arsenic-containing lipids (arsenolipids) and water-soluble arsenicals by a unicellular marine alga was investigated by exposing Dunaliella tertiolecta to five regimes of arsenic and phosphate, and determining the biosynthesized organoarsenicals with HPLC/mass spectrometry. Under all conditions, the major arsenolipid pro...

1. Netherlands Institute for Sea Research, Department of Marine Biogeochemistry & Toxicology, PO Box 59, 1790 AB Den Burg, Texel, The Netherlands. 2. Present address: Department of Biochemistry of Membranes, University of Utrecht, Padualaan 8, 3584 CH Utrecht, The Netherlands. 3. Present address: Nalco Europe B.V. PO Box 627, 2300 AP Leiden, The Netherlands. 4. Woods Hole Oceanographic Institut...

Chlorophylls (Chls) are crucial for capturing light energy for photosynthesis. Although several genes responsible for Chl biosynthesis were characterized in rice (Oryza sativa), the genetic properties of the hydrogenating enzyme involved in the final step of Chl synthesis remain unknown. In this study, we characterized a rice light-induced yellow leaf 1-1 (lyl1-1) mutant that is hypersensitive ...

Aim of the study is to investigate the Nephroprotective activity of ethanolic extract taken from Melia azadirachta leaves, against APAP (Acetaminophen) induced nephrotoxicity. The phytochemical screening was carried out on the leaf extracts of Melia azadirachta, revealed the presence of active ingredients such as Phytol, Squalene, Oleic Acid, 2-Piperidinone, N-[4-bromo-n-butyl]. Leaves of Melia...

Dihydroactinidiolide (1) and a mixture of sterols [campesterol (2), stigmasterol (3) and beta-sitosterol (4)], together with the previously isolated individual compounds beta-sitosterol (4), 2,4-di-tert-butylphenol (5), alpha-tocopherol (6), phytol (7) were isolated from the active ethyl acetate fraction of Pereskia bleo (Kunth) DC. (Cactaceae) leaves. Cytotoxic activities of the above mentione...

The chemical composition of the volatile oil from aerial parts of Hypericum triquetrifolium Turra was studied by GC-MS. Fifty components (97.1% of the total composition) were detected in the volatile oil. Germacrene-D (21.7%), β-caryophyllene (18.3%), δ-cadinene (6.4%), trans-β-farnesene (4.3%), α-humulene (3.8%), β-selinene (3.7%), γ-cadinene (3.3%) and trans-phytol (3.2%) were found to be the...

We examined the antibacterial activities against Staphylococcus aureus of three diterpenes, namely, geranylgeraniol, teprenone, and phytol, by using a broth dilution with shaking method to identify the effects of diterpenes with long aliphatic carbon chains. We also performed time-kill assays and measured the leakage of K(+) ions from bacterial cells in response to these diterpenes. The diterpe...

Background: The helminthiasis parasitic worm present in the gastrointestinal tract of animal cause infection and physiological damage. This occurs due to poor sanitation, impecunious personal hygiene, low socioeconomic position, lack education. Aim: Urochloa distachya (Poaceae) commonly called as signal grass used fodder for animal. investigation was undertaken investigate phytochemicals study ...