Results 71 to 80 of about 8,731 (176)

Chemical Composition and Repellent Effects of Delphinium brunonianum Essential Oil Against Solenopsis invicta

open access: yesGuangdong nongye kexue
【Objective】The red imported fire ant, Solenopsis invicta Buren, is one of the world's most destructive invasive species, posing significant threats to public safety, agricultural and forestry production, and the ecological environment.
Hualong QIU   +5 more
doaj   +1 more source

Seasonal Changes in Marine Archaeal Tetraether Lipid Export Depth Linked to Net Primary Productivity

open access: yesPaleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract Marine ammonia oxidizing archaea (AOA) produce isoprenoid glycerol dibiphytanyl glycerol tetraethers (GDGTs) which form the basis of seawater temperature proxy TEX86. Although most studies use TEX86 for sea surface temperature (SST) reconstructions, maximum GDGT production occurs at and below the nitracline. Moreover, sedimentary GDGT‐2/GDGT‐3
Addison Rice   +12 more
wiley   +1 more source

Absorption of phytol from dietary chlorophyll in the rat

open access: yesJournal of Lipid Research, 1967
The fate of ingested chlorophyll—particularly of the phytol portion of the molecule—was studied. Uniformly 14C-labeled pheophytin a (the Mg-free derivative of chlorophyll a) was prepared from an extract of tobacco leaves grown in 14CO2, and was ...
James H. Baxter, Daniel Steinberg
doaj   +1 more source

Reconstructing Environmental and Microbial Ecosystem Changes Across the Permian–Triassic Mass Extinction at Lusitaniadalen, Svalbard

open access: yesPaleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract The Permian–Triassic environmental crisis triggered fundamental changes in marine ecosystems, culminating in the most severe biodiversity crisis of the Phanerozoic. Yet, the environmental and geochemical conditions governing the crisis and ecosystem recovery remain debated.
S. Z. Buchwald   +17 more
wiley   +1 more source

Photosynthesis under far‐red light—evolutionary adaptations and bioengineering of light‐harvesting complexes

open access: yesFEBS Letters, Volume 600, Issue 2, Page 164-187, January 2026.
Phototrophs evolved light‐harvesting systems adapted for efficient photon capture in habitats enriched in far‐red radiation. A subset of eukaryotic pigment‐binding proteins can absorb far‐red photons via low‐energy chlorophyll states known as red forms.
Antonello Amelii   +8 more
wiley   +1 more source

Metabolism of phytol-U-14C and phytanic acid-U-14C in the rat

open access: yesJournal of Lipid Research, 1966
The metabolism of uniformly-labeled 14C-phytol, 14C-phytenic acid, and 14C-phytanic acid was studied in the rat. Conversion of both phytol and phytenic acid to phytanic acid was demonstrated.
Charles E. Mize   +4 more
doaj   +1 more source

Absorption of chlorophyll phytol in normal man and in patients with Refsum's disease

open access: yesJournal of Lipid Research, 1968
This study was made to determine the extent of absorption of chlorophyll phytol from the intestine of man, and the importance of chlorophyll as a source of the phytanic acid that accumulates in Refsum's disease. Uniformly 14C-labeled pheophytin a (the Mg-
James H. Baxter
doaj   +1 more source

Synthesis of phytanic acid

open access: yesJournal of Lipid Research, 1966
Preparation of methyl phytanate from phytol by catalytic hydrogenation and chromic oxide oxidation is described. The method was applied to the preparation of methyl phytanate-14C.
Stuart Patton, A.A. Benson
doaj   +1 more source

In vitroanti-quorum sensing activity of phytol

open access: yesNatural Product Research, 2014
Anti-quorum sensing activity of the diterpene phytol was evaluated in vitro for the first time. This compound (at three sub-MIC concentrations – 0.5, 0.25 and 0.125 MIC, respectively) reduced the formation of Pseudomonas aeruginosa PAO1 biofilm in the range of 74.00–84.33% exhibiting higher activity than the both positive controls used, streptomycin ...
Pejin, Boris   +4 more
openaire   +4 more sources

New Phytol Derivatives with Increased Cosmeceutical Potential

open access: yesMolecules
Natural compounds are widely incorporated into cosmetic products for many purposes. Diterpenes often function as fragrances, enhancing the sensory experience of these formulations. However, current trends in cosmetic science aim to develop multifunctional products, where compounds traditionally used for texture or fragrance also possess biological ...
Gonçalo P. Rosa   +3 more
openaire   +4 more sources

Home - About - Disclaimer - Privacy