Results 91 to 100 of about 1,479,215 (302)
Journal of Quaternary Science, EarlyView.Abstract Worldwide, lacustrine ecosystems are threatened by eutrophication and deoxygenation. Both processes are driven by the combined effects of human activities and climate change. Understanding the pre‐anthropogenic nexus between warming, eutrophication, deoxygenation, and related feedback is essential to determine how lakes respond to rapid ...
Noé R.M.M. Schmidhauser +7 more
wiley +1 more source
, 1993 A novel epoxide, in addition to eight known diterpenes, has been isolated from a marine brown alga of the genus Dictyota. The structures of these compounds were established by the interpretation and comparison of spectral data with literature data.
Hemling ME +7 more
core
Mercury cycling during the last glacial period in Arctic Lake El'gygytgyn, NE Russia
Journal of Quaternary Science, EarlyView.ABSTRACT Tectonic processes play a key role in the global mercury (Hg) cycle on geological timescales, by mobilising Hg from deep Earth reservoirs to the surface. These natural fluxes also introduce a dynamic component to the terrestrial Hg cycle that can interact with other environmental signals and influence Hg delivery to sedimentary records.
Alice R. Paine +7 more
wiley +1 more source
A New Species of Brown Alga from South Africa
Bothalia: African Biodiversity & Conservation, 1967 Carpomitra longicarpa Simons sp. nov., a speciebus Carpomitrae aliis fronde ecostata tereteque, soris elongatis et filamento uniseriato fili sporangiferi paucis cellulis dilatatis terminato differt.
R. H. Simons
doaj +1 more source
A new compound, jolynamine, from marine brown alga Jolyna laminarioides
, 2011 A new compound, jolynamine (1), was isolated from the marine brown alga Jolyna laminarioides collected from the coast of Karachi, Pakistan. In addition, four known compounds, namely saringosterol (2), loliolide (3), methyl-4-hydroxybenzoate (4) and ...
null Atta-ur-Rahman +9 more
core +1 more source
Journal of Quaternary Science, EarlyView.ABSTRACT Glacial/interglacial climate cycles since marine isotope stage (MIS) 12 influenced the discontinuous and 73 m‐long sediment record from the volcanic crater of Rodderberg in the East Eifel Volcanic Field, Germany. High‐resolution grain size and geochemical data have been valued by numerical dating techniques (radiocarbon and luminescence dating,
Bernd Zolitschka +4 more
wiley +1 more source
New and highly oxidised hydroazulenoid diterpenes from the tropical marine brown alga
, 1993 Continued investigation of the marine brown alga, Dictyota volubilis, has led to the isolation of six new hydroazulenoid, 1–6, and five previously reported diterpenes, 7–11. Each of the new compounds is unusual in either the degree of oxygenation and, or
Gabriele M. K?nig and Otto Sticher +1 more
core
Land Degradation &Development, EarlyView.ABSTRACT Heavy metal (HM) contamination of soil–plant systems poses persistent ecological and health risks, driving interest in nanoparticle‐based remediation. Although conventional chemically synthesized nanoparticles (CSNPs) are effective, their energy‐intensive production and residual toxicity limit sustainable deployment.
Babar Hussain +6 more
wiley +1 more source
Four oxylipins from the brown alga Eisenia bicyclis
Fisheries and Aquatic SciencesFour oxylipin derivatives (1–4) were isolated from a 70% ethanol extract of Eisenia bicyclis, a brown alga. The structures of 1–4 were elucidated by the interpretation with nuclear magnetic resonance (NMR) and mass spectroscopic analysis.
Gun-Woo Oh +8 more
doaj +1 more source