Results 31 to 40 of about 339,529 (309)

Carbon isotope fractionation during aerobic biodegradation of trichloroethene by Burkholderia cepacia G4: a tool to map degradation mechanisms [PDF]

open access: yes, 2002
The strain Burkholderia cepacia G4 aerobically mineralized trichloroethene (TCE) to CO2 over a time period of similar to20 h. Three biodegradation experiments were conducted with different bacterial optical densities at 540 nm (OD(540)s) in order to test
Schuth, Christoph   +25 more
core   +1 more source

FRACTIONAL DERIVATIVE AS FRACTIONAL POWER OF DERIVATIVE [PDF]

open access: yesInternational Journal of Mathematics, 2007
Definitions of fractional derivatives as fractional powers of derivative operators are suggested. The Taylor series and Fourier series are used to define fractional power of selfadjoint derivative operator. The Fourier integrals and Weyl quantization procedure are applied to derive the definition of fractional derivative operator.
openaire   +2 more sources

Fractional free space, fractional lenses, and fractional imaging systems [PDF]

open access: yesJournal of the Optical Society of America A, 2003
Continuum extensions of common dual pairs of operators are presented and consolidated, based on the fractional Fourier transform. In particular, the fractional chirp multiplication, fractional chirp convolution, and fractional scaling operators are defined and expressed in terms of their common nonfractional special cases, revealing precisely how they ...
Sümbül, U., Ozaktas, H., M.
openaire   +3 more sources

A fractional calculus on arbitrary time scales: Fractional differentiation and fractional integration [PDF]

open access: yesSignal Processing, 2015
We introduce a general notion of fractional (noninteger) derivative for functions defined on arbitrary time scales. The basic tools for the time-scale fractional calculus (fractional differentiation and fractional integration) are then developed. As particular cases, one obtains the usual time-scale Hilger derivative when the order of differentiation ...
Nadia Benkhettou   +2 more
openaire   +4 more sources

Silicon isotope fractionation during silica precipitation from hot-spring waters: Evidence from the Geysir geothermal field, Iceland [PDF]

open access: yes, 2015
This study aims to explore the extent and controls of silicon isotope fractionation in hot spring systems of the Geysir geothermal area (Iceland), a setting where sinter deposits are actively formed.
Keller, Nicole S.   +14 more
core   +2 more sources

Recent advances in high-temperature fractionation of polyolefins

open access: yes, 2022
S.77-140The synthesis and characterization of polyolefins continues to be one of the most important areas for academic and industrial research. One consequence of the development of new ""tailor-made"" polyolefins is the need for new and improved ...
Macko, Tibor   +2 more
core   +1 more source

Identification of biologically active fractions in the dermal secretions of the genus Bombina (Amphibia: Anura: Bombinatoridae)

open access: yesActa Herpetologica, 2020
Amphibian skin secretions have long been considered a convenient and useful natural source of bioactive compounds, but a comprehensive study of the effects of their dermal secretions on diverse parameters of the hemostasis system has not yet been carried
Iryna Udovychenko   +4 more
doaj   +1 more source

Base specific fractionation of double stranded DNA: affinity chromatography on a novel type of adsorbant [PDF]

open access: yes, 1978
Bünemann H, Müller W. Base specific fractionation of double stranded DNA: affinity chromatography on a novel type of adsorbant. Nucleic Acids Research.
Werner Mliller   +4 more
core   +1 more source

Impact of dry, particle-size fractionation on protein and amino acid content of three seaweed species

open access: yesInternational Journal of Food Properties, 2022
Market demand for “clean and green” food products is increasing, and so there is growing opportunity for the seaweed aquaculture industry to take a position as a key food producer in this area.
Laura E Healy   +7 more
doaj   +1 more source

FRAKSINASI PROTEIN KAPANG LAUT Xylaria psidii KT30 DAN SITOTOKSISITASNYA TERHADAP SEL HeLa [Fractionation of Proteins of Marine Fungus Xylaria psidii KT30 and their Cytotoxicity against HeLa Cells]

open access: yesJurnal Teknologi dan Industri Pangan, 2014
Cervical cancer is the most common cause of death for Indonesian women after human breast cancer. One of the efforts of cancer treatment is the utilization of natural compounds.
Mita Gebriella Inthe   +2 more
doaj   +1 more source

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