O COTIDIANO E A HISTÓRIA: CONSTRUINDO NOVOS OLHARES NA ADMINISTRAÇÃO

The purpose of this article is to discuss the possible contributions of studies that combine history and everyday life to build new perspectives about Management. To achieve this goal, we discuss the association of Management, history, and studies about everyday life as an option to produce alternative perspectives within Management. We conclude by reiterating that the construction of these dialogues can open interesting paths to the development of self-reflective knowledge that are politically, socially, and geographically positioned

Predicting invasive signal crayfish (Pacifastacus leniusculus) spread using a traditional survey and river network simulation

Rivers are among the most vulnerable ecosystems to biological invasions. After introduction, predicting the timing and magnitude of population growth and range expansion is critical to decision making on where management tactics will be most efficient. Yet, management is often hindered by the lack of knowledge on species-specific attributes and the spatially complex structure of river networks that influences connectivity between sites. We analysed the population structure and predicted the range expansion of signal crayfish (Pacifastacus leniusculus), an invasive species in North-western Italy which was first recorded in the Valla Stream in 2009 and then spread to adjacent rivers including Erro Stream in 2020. A total of 1,284 individual P. leniusculus crayfish were collected in the Valla Stream. No significant difference was found in density or body condition along a downstream gradient for different sex and maturity classes. These empirical data were combined with the available scientific literature to obtain key life-history information for P. leniusculus, including carrying capacity, downstream versus upstream dispersion and proliferation rate. We used the OCNet R package to simulate the Erro Stream network and applied a meta-population model to predict the range expansion of this species over time. Results indicate P. leniusculus may completely invade the Erro Stream network in 30–40 years, depending on the proliferation rate and without additional introductions. These findings represent one of the first attempts to use optimal channel networks simulation in R to predict the meta-population dynamics of aquatic invasive species, a potential key tool to prevent invasive species spread

Cardiac interstitial cells express GATA4 and control dedifferentiation and cell cycle re-entry of adult cardiomyocytes.

Interstitial cells of the adult rat heart were characterized with respect to i) expression of cardiac markers of commitment and differentiation, ii) myogenic potential in vitro and iii) ability to modulate cardiomyocyte differentiation state. We demonstrate for the first time that fibroblasts and a proportion of pericytes in the adult rat heart express the transcription factor GATA4. This appears to be a peculiar property of the heart. Fibroblasts that are also derived from the splanchnopleuric mesoderm, such as those of the gut, or fibroblasts of different embryological origin, such as those of skin and skeletal muscle, lack this property. Of note, a nestin+/GATA4+ putative stem cell population is also detected in the adult heart. GATA4+ cardiac interstitial cells do not display myogenic potential in vitro. However, cardiac fibroblasts, but not skin fibroblasts, stimulate dedifferentiation of adult cardiomyocytes and their re-entry into the cell cycle in vitro, as demonstrated by the high number of cardiomyocytes expressing Ki67, phosphorylated histone H3 (H3P) and incorporating 5-bromodeoxiuridine (BrdU) in the co-cultures. In conclusion, cardiac fibroblasts have peculiar expression of myogenic transcription factors, a property that may have an impact for reprogramming these cells to the myogenic differentiation. In addition, they are able to modulate the behavior of adult cardiomyocytes, a property that may be used to promote dedifferentiation and proliferation of cardiac cells in the damaged myocardium

Role of acidic and basic electrolytes on the structure and morphology of cathodically reduced indium tin oxide (ITO) substrates

In this report we track the structural changes suffered by ITO along galvanostatic polarization at differentcurrent densities by X-ray diffraction and SEM micrographs. The XRD shown that cathodic treatmentinduces structural change in ITO, characterized by appearing peaks set distinct from ITO original structureassociated to metallic phase of the solid solution of In-Sn. It is interesting to note that although thedifferent ions present in the solution are not, at least to a noticeable degree, incorporated in the metallicphase, the SEM images show that they do influence its formation, pointing to some type of adsorptivemechanism of the inert ions during the lateral diffusion of the metallic ions.CNPq (INCT 573762/2008-2, 380200/2010-4)FAPESCFAPESP (11/11065-0)CAPE