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 & Catalysis. The organization has 2143 authors who have published 3674 publications receiving 71071 citations. The organization is also known as: FFCLRP & FFCLRP-USP.

Influence of calcium on the blood pressure and renal effects of stevioside.

Abstract: 1. The effects of verapamil (V, 0.015 mg/min, i.v.) or CaCl2 (800 mEq/l, 0.025 ml kg-1 min-1, i.v.) on renal function and mean arterial pressure (MAP) were evaluated in male Wistar rats weighing 280-320 g during treatment with stevioside (S, 16 mg kg-1 h-1, i.v.). 2. Verapamil administered to 10 rats significantly increased the hypotensive effect of stevioside on MAP (control, 124 +/- 0.77; S, 96 +/- 1.50; S+V, 67 +/- 0.70 mmHg) and on fractional sodium excretion (control, 0.76 +/- 0.05; S, 1.56 +/- 0.10; S+V, 2.72 +/- 0.25%). Urinary flow, reported as percent glomerular filtration rate (V/GFR), and renal plasma flow (RPF) increased slightly but not significantly during stevioside plus verapamil administration. 3. In contrast, infusion of CaCl2 in 10 rats pretreated with stevioside induced a marked attenuation of MAP (control, 119 +/- 1.83; S, 70 +/- 1.12; S+CaCl2, 109 +/- 1.60 mmHg) and RPF (control, 16.73 +/- 3.76; S, 34.33 +/- 2.55; S+CaCl2, 17.20 +/- 2.87 ml min-1 kg-1). The diuresis and natriuresis induced by stevioside were also inhibited by simultaneous administration of CaCl2. 4. These data are consistent with the view that stevioside acts on arterial pressure and renal function as a calcium antagonist, as is the case for verapamil.

Postcranial anatomy of the hyperodapedontine rhynchosaur Teyumbaita sulcognathus (Azevedo and Schultz, 1987) from the Late Triassic of Southern Brazil

Abstract: Teyumbaita sulcognathus is a peculiar endemic Brazilian rhynchosaur that remained somewhat obscure until recently, when its skull anatomy was described and a new generic name was assigned to this highly autapomorphic taxon. Here, the postcranial skeleton of Teyumbaita sulcognathus is for the first time fully described based on the holotype and the two more complete referred specimens. Rhynchosaur postcranial anatomy has usually been considered to be rather conservative, but T. sulcognathus shows unforeseen morphological variation. Autapomorphic traits were added to the diagnosis of T. sulcognathus and intraspecific variation was also identified. In addition, six new phylogeneticaly informative postcranial characters were recognized. Some of these represent apomorphies of clades such as Rhynchosauridae (axis with ventral keel, crest on the anteromedial surface of tibial shaft) and Hyperodapedontinae (postaxial cervical vertebrae with ventral keel, supinator process composed of a low supinator ridg...

Importance of riparian forest corridors for the ocelot in agricultural landscapes

Abstract: Worldwide, private lands have attracted increased attention from conservationists, not only because most of the globe is privately owned, but also because private lands can be an asset to the protected area conservation strategy. In Brazil, the riverine Areas of Permanent Protection (APPs) are a key instrument of the Forest Code to protect biodiversity on private lands, acting as wildlife corridors. We assessed this putative role of APPs by evaluating how ocelot (Leopardus pardalis) occurrence is influenced by covariates in 3 cerrado landscapes dominated by sugarcane and managed forests of eucalyptus and pine trees. We collected detection–nondetection data by camera trapping during 2 dry seasons (2013 and 2014) at 208 stations (6,606 camera-days). We estimated ocelot detection and mean relative abundance using a single-species, single-season occupancy model that accounts for heterogeneous detection probability induced by variation in abundance. Modeling results showed that percentage of native forest was the most important covariate to explain mean relative abundance of ocelots. This parameter was also affected positively by APPs, with ocelots being more abundant inside than outside APPs and, unexpectedly, by sugarcane. Given our study design, however, the positive effect of this crop likely reflects the contact zone between sugarcane and native forest. Our findings show that landscape composition affects ocelot abundance and highlight the importance of APPs and Legal Reserves in agricultural landscapes. We conclude that, in such landscapes, compliance to the Forest Code by private land owners is key to supporting ocelot occurrence. As terras privadas vem atraindo cada vez mais a atencao dos conservacionistas mundialmente, nao apenas porque ocupam a maior parte do globo, mas tambem como aliadas da estrategia de conservacao de areas protegidas. No Brasil, as Areas de Preservacao Permanente (APPs) riparias sao um instrumento fundamental do Codigo Florestal para proteger a biodiversidade em areas privadas, pois agem como corredores biologicos. A fim de avaliar esse papel das APPs, nos analisamos como a ocorrencia da jaguatirica (Leopardus pardalis) e influenciada pelas APPs e por outras covariaveis em 3 paisagens de cerrado dominadas por plantacoes de cana-de-acucar e silvicultura de eucalipto e Pinus ssp.. Nos coletamos dados de deteccao/nao-deteccao por meio de armadilhamento fotografico durante 2 estacoes secas (2013 e 2014) em 208 pontos (6606 câmera-dias). Nos estimamos a deteccao e a abundância media relativa da jaguatirica com um modelo de ocupacao especie-unica/estacao-unica, o qual considera que a heterogeneidade existente na probabilidade de deteccao e gerada por variacoes na abundância. Os resultados da modelagem mostraram que a porcentagem de vegetacao nativa foi a covariavel mais importante para explicar a abundância media relativa da jaguatirica. Esse parâmetro tambem foi positivamente influenciado pelas APPs, sendo que a abundância desse felino foi maior dentro do que fora de APPs, e, inesperadamente, pela cana-de-acucar. Contudo, em funcao do nosso delineamento amostral, o efeito positivo dessa cultura agricola provavelmente reflete a zona de contato entre a cana e a floresta nativa. Nossos resultados mostram que a composicao da paisagem e determinante para a abundância desse felino e ressaltam a importância das APPs e Reservas Legais em uma matriz agrosilvicultural. Nos concluimos que, em paisagens como essas, o cumprimento do Codigo Florestal e fundamental para a ocorrencia da jaguatirica.