Results 121 to 130 of about 67,900 (262)

Association of the gonyaulacoid dinoflagellate Alexandrium ostenfeldii with spirolide toxins in size-fractionated plankton

open access: yes, 2001
Spirolides are pharmacologically active macrocyclic imines discovered in shellfish and plankton size-fractions collected from near-surface waters along the southeastern coast of Nova Scotia (NS), Canada.
Bauder, A. G.   +7 more
core   +1 more source

The Preparation of Novel Fluorenes Inspired by Hipposudoric Acid

open access: yesHelvetica Chimica Acta, EarlyView.
In this research we report on the design and synthesis of a series of fluorene‐based derivatives loosely inspired by the tricyclic framework of hipposudoric acid. Preparation of sixteen novel N‐alkylated derivatives was accomplished via a series of concise one‐step amide N‐alkylation reactions.
Munib Uddin   +3 more
wiley   +1 more source

Measuring Temporal Variations of Nucleotide Pools in Microbial Granular Biofilm

open access: yesHelvetica Chimica Acta, EarlyView.
The developed metabolomics workflow enables quantification of energy nucleotides in complex microbial biofilms. The method provides a foundation for investigating rapid metabolic responses to dynamic environmental conditions. ABSTRACT Microbial communities often face environmental fluctuations that occur on timescales much shorter than their growth ...
Jitske M. van Ede   +3 more
wiley   +1 more source

Valuing marine plankton: a review of ecosystem services and disservices and an expert assessment of the potential of area-based protection

open access: yesFrontiers in Marine Science
Marine plankton play a crucial yet understudied economic role, contributing both positively through ecosystem services (ES) and negatively through ecosystem disservices (EDS).
Eva Wanek   +4 more
doaj   +1 more source

Vertical profiles of marine particulates: a step towards global scale comparisons using an Autonomous Visual Plankton Recorder

open access: yes, 2014
8 pages, 7 figures, 1 tableAn Autonomous Visual Plankton Recorder (AVPR) was used to record colour in situ images of plankton and other marine particulates at several oligotrophic stations around the world, including a northern hemisphere subtropical ...
Hall, Mike   +8 more
core   +1 more source

The effect of calcium and magnesium on the aggregation of a purple phototrophic bacteria mixed consortium

open access: yesJournal of Chemical Technology &Biotechnology, EarlyView.
Abstract BACKGROUND An essential aspect of applying Purple Phototrophic Bacteria (PPB) technology for wastewater treatment is the biomass separation from the aqueous phase. Ca2+ and Mg2+ have been used to enhance the aggregation of different biological matrices. In this paper, the effect of Ca2+ and Mg2+ on the aggregation of a mixed culture of PPB was
Jairo M Carrillo‐Osorio   +1 more
wiley   +1 more source

Resting vs active stages in plankton dynamics (southern Italy, Ionian Sea, Mediterranean)

open access: yes, 2015
Marine coastal plankton undergoes seasonal fluctuations and interannual variations in its composition mainly justified with the alternance of active stages in the water column and resting stages (cysts) in the sediments.
Belmonte M, Belmonte G, Rubino F
core  

Responses of primary producers, anoxia, and chemical feedback to Late Glacial climate change: Insights from a paired lake approach

open access: yesJournal 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

Spectroscopic aspects of underwater digital holography of plankton

open access: yesScientific Reports
Monitoring the parameters and behavior of plankton makes it possible to assess the state of the aquatic ecosystem and detect the beginning of an environmental disaster at an early stage.
Victor Dyomin   +3 more
doaj   +1 more source

When Preserving Plankton Changes What We See

open access: yes
To study plankton, scientists often collect seawater and add a chemical preservative so the tiny organisms inside can be examined later under the microscope. This sounds simple: take a sample, “fix” it, store it, and count what was there. But the reality
Calbet, Albert
core  

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