Sympatry and evolution: relationships between the endemic Myrcia guarujana and the widely distributed M. spectabilis.

Myrcia spectabilis DC. has a wide distribution in the south and southeast Brazilian regions. M.

A resonant valence bond spin liquid in the dilute limit of doped frustrated Mott insulators.

Ideas about resonant valence bond liquids and spin-charge separation have led to key concepts in physics such as quantum spin liquids, emergent gauge symmetries, topological order and fractionalization. Despite extensive efforts to demonstrate the existence of a resonant valence bond phase in the Hubbard model that originally motivated the concept, a definitive realization has yet to be achieved. Here we present a solution to this long-standing problem by uncovering a resonant valence bond phase exhibiting spin-charge separation in realistic Hamiltonians.

Validation of a freely distributable software for the analysis of electrophysiological signals: Smart Tools for Evoked Potentials (STEP).

Purpose: This study aimed to validate the STEP, an application developed for the analysis of various auditory and vestibular electrophysiological signals. The STEP was designed to enhance the accuracy and efficiency of latency and amplitude analysis, as well as other waveform morphological features such as calculation of area, slope, and Fast Fourier Transform (FFT).

Methods: The methodology was structured into two phases: one involving simulated waveforms and the other based on experimental data.

Resistive Anomaly near a Ferromagnetic Phase Transition: A Classical Memory Effect.

We investigate resistive anomalies in metals near a ferromagnetic phase transition, emphasizing the role of long-range critical fluctuations. Our analysis shows that electron diffusion near the critical temperature T_{c} enhances the singular behavior of resistivity via a classical memory effect, exceeding the prediction of Fisher and Langer [Phys. Rev.

A novel fully biobased material composite for cosmetic packaging applications.

The extensive production and use of fossil-based plastics have led to their ubiquity worldwide, causing growing concern and environmental problems. Consequently, developing biobased polymers and biobased composite materials, aligned with circular economy principles, is now the focus as a sustainable alternative to fossil-based plastics. This work aimed to develop and characterise a new, fully biobased, and biodegradable material composite with properties similar to traditional fossil-based plastics, allowing its use in cosmetic product applications as an alternative to commonly used fossil-based plastics.