Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto

About: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto is a based out in . It is known for research contribution in the topics: Population & Genus. The organization has 2143 authors who have published 3674 publications receiving 71071 citations. The organization is also known as: FFCLRP & FFCLRP-USP.

Insights from insects about adaptive social information use

Abstract: Copying others can greatly improve individual fitness and is fundamental for the organisation of societies. Yet in some situations it is better to ignore social information and either explore the world individually or use personal information obtained through prior experience. Insects provide excellent models to study the strategic use of social information, but insights from recent research have rarely been viewed in the light of social learning strategies. Here we discuss how insects tailor their reliance on social information to those circumstances for which it is most beneficial, and suggest that insects and vertebrates use similar information-use strategies. We highlight future research avenues, including the use of molecular tools to study the genetic and genomic basis of social information use.

Identification and quantification of phytochelatins in roots of rice to long-term exposure: evidence of individual role on arsenic accumulation and translocation

Abstract: Rice has the predilection to take up arsenic in the form of methylated arsenic (o-As) and inorganic arsenic species (i-As) Plants defend themselves using i-As efflux systems and the production of phytochelatins (PCs) to complex i-As Our study focused on the identification and quantification of phytochelatins by HPLC-ICP-MS/ESI-MS, relating them to the several variables linked to As exposure GSH, 11 PCs, and As–PC complexes from the roots of six rice cultivars (Italica Carolina, Dom Sofid, 9524, Kitrana 508, YRL-1, and Lemont) exposed to low and high levels of i-As were compared with total, i-As, and o-As in roots, shoots, and grains Only Dom Sofid, Kitrana 508, and 9524 were found to produce higher levels of PCs even when exposed to low levels of As PCs were only correlated to i-As in the roots (r=0884, P <0001) However, significant negative correlations to As transfer factors (TF) roots–grains (r= –0739, P <005) and shoots–grains (r= –0541, P <005), suggested that these peptides help in trapping i-As but not o-As in the roots, reducing grains’ i-As Italica Carolina reduced i-As in grains after high exposure, where some specific PCs had a special role in this reduction In Lemont, exposure to elevated levels of i-As did not result in higher i-As levels in the grains and there were no significant increases in PCs or thiols Finally, the high production of PCs in Kitrana 508 and Dom Sofid in response to high As treatment did not relate to a reduction of i-As in grains, suggesting that other mechanisms such as As–PC release and transport seems to be important in determining grain As in these cultivars

Fluorescence Spectroscopy of Biological Tissues—A Review

Abstract: Fluorescence of the skin, enamel, dentin, and bone are reviewed. Fluorescence spectroscopy is one of the noninvasive methods that can identify diseases and promote increasing the knowledge in medical diagnosis. The microstructure and composition of biological tissues are presented, followed by a description of chromophores, fluorophores as identified by use of applied fluorescence techniques.