Introduction: Human sleep is fundamental for the proper occurrence of organic functions. Hence, the lack of sleep can impair cognitive function, resulting in emotional problems, memory changes and disease onset. However, it is worth noting that sleep is influenced by outside factors, such as drug use.
View Article and Find Full Text PDFBackground: Heart failure (HF) is the most prevalent disease among chronic diseases and has been associated with a high prevalence of erectile dysfunction (ED).
Objective: this study aims to analyze research that has as its object of study the sexual activity of patients with HF.
Methods: A high-sensitivity search was performed in databases (PUBMED via MEDLINE, Cochrane, EMBASE, Web of Science, SCOPUS AND CINAHL) using descriptors linked to sexuality and heart failure.
Linear carbon chains (LCCs) are one-dimensional materials with unique properties, including high Debye temperatures and restricted selection rules for phonon interactions. Consequently, their Raman C-band frequency's temperature dependence is a probe to their thermal properties, which are well described within the Debye formalism even at room temperatures. Therefore, with the basis on a semiempirical approach we show how to use the C band to evaluate the LCCs' internal energy, heat capacity, coefficient of thermal expansion, thermal strain, and Grüneisen parameter, providing universal relations for these quantities in terms of the number of carbons atoms and the temperature.
View Article and Find Full Text PDFIsolated linear carbon chains (LCCs) encapsulated by multiwalled carbon nanotubes are studied under hydrostatic pressure (P) via resonance Raman scattering. The LCCs' spectroscopic signature C band around 1850 cm^{-1} softens linearly with increasing P. A simple anharmonic force-constant model not only describes such softening but also shows that the LCCs' Young's modulus (E), Grüneisen parameter (γ), and strain (ϵ) follow universal P^{-1} and P^{2} laws, respectively.
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