Results 21 to 30 of about 16,833 (225)

Die Trennung von Carotinoidgemischen durch Gegenstromextraktion (II)

open access: yesCHIMIA, 1973
Countercurrent distribution has been used for the separation of β-carotene and its epoxides without rearrangement reactions. The separation of an extract from Carica papaya shows that this method is suitable for the detection of carotenoids which occur ...
H. Pfander   +3 more
doaj   +1 more source

Inferring cetacean population densities from the absolute dynamic topography of the ocean in a hierarchical Bayesian framework. [PDF]

open access: yesPLoS ONE, 2015
We inferred the population densities of blue whales (Balaenoptera musculus) and short-beaked common dolphins (Delphinus delphis) in the Northeast Pacific Ocean as functions of the water-column's physical structure by implementing hierarchical models in a
Mario A Pardo   +7 more
doaj   +1 more source

Imaging spontaneous imbibition in full Darcy‐scale samples at pore‐scale resolution by fast X‐ray tomography [PDF]

open access: yes, 2019
Spontaneous imbibition is a process occurring in a porous medium which describes wetting phase replacing nonwetting phase spontaneously due to capillary forces.
Bartels, W. B.   +9 more
core   +2 more sources

Two-step separation of nostotrebin 6 from cultivated soil cyanobacterium (Nostoc sp.) by high performance countercurrent chromatography [PDF]

open access: yes, 2014
High performance countercurrent chromatography (HPCCC) was successfully applied for the separation of nostotrebin 6 from cultivated soil cyanobacteria in a two-step operation.
Berthod   +13 more
core   +2 more sources

Potential and analysis of an osmotic power plant in the Magdalena River using experimental field-data [PDF]

open access: yes, 2019
Producción CientíficaThe Magdalena River mouth in Colombia is studied as a candidate site for a renewable power plant via osmotic energy technology, using pressure retarded osmosis.
Salamanca Parra, Jacobo Manuel   +2 more
core   +1 more source

Spatial-temporal variations of short-lived mesoscale eddies and their environmental effects

open access: yesFrontiers in Marine Science, 2023
Mesoscale eddies (MEs) affect the transport and redistribution of oceanic matter and energy. The long-lived and long-distance propagation of individual eddies has garnered extensive attention; however, short-lived MEs (< 7 days) have been widely ...
Shidong Liu   +11 more
doaj   +1 more source

Methodology for Porphyrin Isolation by High-Performance Countercurrent Chromatography

open access: yesNatural Product Communications, 2014
Countercurrent chromatography is a versatile technique for the isolation of a wide variety of plant substances. However, little attention has been devoted to the application of this technique for the isolation of porphyrins.
Amaro C. Ramos   +4 more
doaj   +1 more source

Die Verteilung von hochmolekularen Stoffen und von Zellfragmenten in flüssigen Phasenpaaren zur Fraktionierung

open access: yesCHIMIA, 1972
The possibilities and the problems of fractionating high molecular substances and cell fragments with liquid phase pairs are discussed. Low molecular substances are now currently separated by countercurrent distribution.
P. von Tavel
doaj   +1 more source

Numerical simulation of the processes of burning lignite in a vortex furnace with swirling countercurrent flows

open access: yesProduction Engineering Archives, 2022
This work presents the results of a numerical study of the working processes of burning lignite in a vortex furnace with swirling countercurrent flows. The results of computer simulation of the processes of burning lignite with a moisture content of 30%,
Redko Andriy   +7 more
doaj   +1 more source

The River–Sea Interaction off the Amazon Estuary

open access: yesRemote Sensing, 2022
The Amazon River has the highest discharge in the world. Nevertheless, there is still a lack of the research on the interaction between river-diluted water and the ocean.
Di Yu   +7 more
doaj   +1 more source

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