Results 41 to 50 of about 105,657 (178)

Determination of the interaction impedance of helix slow-wave structures. [PDF]

open access: yes, 2000
The computer simulation of helix travelling-wave tubes requires accurate information about the phase velocity, interaction impedance and attenuation of the helix slow wave structure at each frequency.
Carter, R. G.
core   +5 more sources

The Triple Helix of University-Industry-Government Relations [PDF]

open access: yes, 2012
Etzkowitz & Leydesdorff (2000) further elaborated the Triple Helix of University-Industry-Government Relations (cf. Etzkowitz & Leydesdorff, 1995; Lowe, 1982) into a model for studying knowledge-based economies.
Leydesdorff, Loet   +2 more
core   +2 more sources

Can processes make relationships work? The Triple Helix between structure and action [PDF]

open access: yes, 2014
This contribution seeks to explore how complex adaptive theory can be applied at the conceptual level to unpack Triple Helix models. We use two cases to examine this issue – the Finnish Strategic Centres for Science, Technology & Innovation (SHOKs) and ...
Kuusisto, Jari   +7 more
core   +1 more source

N-glycan structures of β-HlH subunit of Helix lucorum hemocyanin [PDF]

open access: yesCarbohydrate Research, 2017
The carbohydrate structures of molluscan hemocyanins have recently received particular interest due to their specific monosaccharide composition, as well as their immunostimulatory properties and application in clinical studies. For the first time, we investigated N-glycans of the structural subunit β-HlH of hemocyanin isolated from Helix lucorum.
Velkova, Lyudmila   +3 more
openaire   +3 more sources

Assessment of the toxicity and antiproliferative activity of hemocyanins from Helix lucorum, Helix aspersa and Rapana venosa

open access: yesBulgarian Chemical Communications, 2021
Hemocyanins (Hcs) are respiratory, oxygen-carrying metalloproteins that are freely dissolved in the hemolymph of many molluscs and arthropods. The interest in hemocyanins has grown significantly since it was found that they can be successfully used in immunotherapy of neoplastic diseases as non-specific or active stimulators of the immune system ...
I. Yankova   +10 more
openaire   +1 more source

Evolutionary paths of electric oscillators

open access: yesЭкспериментальная психология, 2015
The endogenous electrical signals play an important role in information processes occurring in living systems. They are found in living beings of different evolutionary levels from prokaryotes to multicellular eukaryotes.
T.N. Grechenko   +2 more
doaj   +1 more source

Adaptive Changes in the Vestibular System of Land Snail to a 30-Day Spaceflight and Readaptation on Return to Earth

open access: yesFrontiers in Cellular Neuroscience, 2017
The vestibular system receives a permanent influence from gravity and reflexively controls equilibrium. If we assume gravity has remained constant during the species' evolution, will its sensory system adapt to abrupt loss of that force?
Nikolay Aseyev   +17 more
doaj   +1 more source

De Novo Structural Determination of the Oligosaccharide Structure of Hemocyanins from Molluscs

open access: yesBiomolecules, 2020
A number of studies have shown that glycosylation of proteins plays diverse functions in the lives of organisms, has crucial biological and physiological roles in pathogen–host interactions, and is involved in a large number of biological events in the ...
Pavlina Dolashka   +3 more
doaj   +1 more source

Biological Flora of Britain and Ireland: Geranium sylvaticum*

open access: yesJournal of Ecology, Volume 114, Issue 2, February 2026.
Geranium sylvaticum is a perennial forb of upland grasslands, woodlands and riverbanks in northern Britain, with scattered native occurrences also in Wales, central England and Northern Ireland. It has an extensive native range in Europe and Asia. The species is gynodioecious, with individual plants typically female or hermaphrodite.
Markus Wagner   +6 more
wiley   +1 more source

Regulation of histone H4 acetylation in the CNS and defensive behavior command neurons of the mollusk Helix mediated by serotonin and neuropeptide FMRFamide

open access: yesВавиловский журнал генетики и селекции, 2018
Epigenetic mechanisms are commonly known to underlie memory formation. Presently, scientists’ attention is focused on changes in the levels of histone modifications (mainly acetylation and methylation) in the chromatin of CNS cells tested in various ...
L. N. Grinkevich, T. G. Zachepilo
doaj   +1 more source

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