1,721,078 research outputs found
Effect of β-cyclodextrin on multi-to uni-lamellar thermal transition of catanionic vesicles
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Probabilistic typed natural deduction for trustworthy computations
No full textIn this paper we present a typed natural deduction calculus to analyze the formal design of probabilistic computational processes, e.g. in use in machine learning techniques, to model their trustworthiness as a safety property
Étude analytique de provenance d'un vase signé C. Cin ( ) Senoviri trouvé à Salelles, Le Bosc (Hérault)
No full textAsaro F., Michel H., Widemann F., Fillières-Kunetz D. Étude analytique de provenance d'un vase signé C. Cin ( ) Senoviri trouvé à Salelles, Le Bosc (Hérault). In: Gallia, tome 33, fascicule 2, 1975. pp. 225-228
Substrate Dissipation Energy Regulates Cell Adhesion and Spreading
Full text linkRecent evidence has led to the hypothesis that dissipation of energy through the viscoelastic extracellular matrix (ECM) can play a cardinal role in directing cell-fate decisions, but whether and how it correlates with specific cell response is at present unclear. Here, viscoelastic and plastic 2D chitosan-based substrates endowed with different dissipative energies are developed and cell behavior studied in terms of adhesion and spreading. While keeping constant stress relaxation and systematically decoupling overall stiffness from linear elongation, an energy dissipation term (J mol−1) is introduced, that is the molar energy required to deviate from linear stress–strain regime and enter into plastic region. Strikingly, an inverse relationship is unveiled between substrate dissipation energy and cell response, with high adhesion/high spreading and low adhesion/no spreading detected for substrates at low and high dissipation energy, respectively. It is concluded that cells decide how to react depending on the effective energy they can earmark for their functions
Insights into Catanionic Vesicles Thermal Transition by NMR Spectroscopy
No full textOppositely charged ionic surfactants can self-assemble into hollow structures, called catanionic vesicles,
where the anionic-cationic surfactant pair assumes a double-tailed zwitterionic attitude. In the present
work, multilamellar-to-unilamellar thermal transition of a mixed aqueous system of sodium dodecyl
sulphate (SDS) and cetyl trimethyl ammonium bromide (CTAB), with a slight excess of the anionic one,
has been investigated by 1H, 2H, 14N NMR spectra and 23Na transverse relaxation measurements. It has
been inferred that an increase of the temperature enhances the SDS counterion dissociation, which can be
considered as one of the driving forces of the mentioned transition. Moreover, interesting 23Na T2 changes
with temperature have been detected for unilamellar aggregates
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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