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.

Continuous growth models in terms of generalized logarithm and exponential functions

Abstract: Consider the one-parameter generalizations of the logarithmic and exponential functions which are obtained from the integration of non-symmetrical hyperboles. These generalizations coincide to the one obtained in the context of non-extensive thermostatistics. We show that these functions are suitable to describe and unify the great majority of continuous growth models, which we briefly review. Physical interpretation to the generalization function parameter is given for the Richards’ model, which has an underlying microscopic model to justify it.

Analysis and development of AC biosusceptometer for orocaecal transit time measurements.

Abstract: axisymmetric vibrations of a spheroidal model of the head,' J. Biomech., 9, pp. 803-812 LIU, Y. K., CHANDRAN, K. B., and VoN ROSENBURG, D. U. (1975): 'Angular Acceleration of viscoelastic(kelvin) material in a rigid spherical shell--a rotational head injury model,' J. Biomech., 8, pp. 285-292 MERCHANT, H. C., and C~uSPtNO, A. J. (1974): \"A dynamic analysis of an elastic model of the human head,' .I. Biomech., 7, pp. 295-301 MISRA, J. C., and CI~,KRAVARrHY, S. (1984): 'A study on rotational brain injury,' J. Biomech., 7, pp. 459-466 NmA, (1990): Numerically Integrated Element for System Analysis, Engineering Mechanics Research Centre, Michigan Ntnu Ag.g.AS (1975): 'Dynamic analysis of a fluid filled spherical sandwich shell--a model of the human head,' J Biomech., 8, pp. 275-284 RUAN, J. S., KHALIL, T. B., and KING, A. I. (1991): 'Human head dynamic response to side impact by finite element modelling,' ASME J Biomech. Eng., 113, pp. 276-283 SHUGAR, T. A., and KATONA, M. G. (1975): 'Development of finite element model of the human head.' ASCE EM3, 109, E173, pp. 223-239 WARD, C. C., N[KRAVESH, P. E., and THOMPSON, IL B. (1978): 'Biodynamie finite element models used in brain injury research,' J Aviation Space, Env. Med., pp. 136-142 WARD, C. C., L--'KAN, M., and NAHUM, A. (1981): 'InWacranial pressure----a brain injury criterion.' Proc. 24th STAPP Car Crash Conf., pp. 163-185

Na,K-ATPase activity and epithelial interfaces in gills of the freshwater shrimp Macrobrachium amazonicum (Decapoda, Palaemonidae).

Abstract: Diadromous freshwater shrimps are exposed to brackish water both as an obligatory part of their larval life cycle and during adult reproductive migration; their well-developed osmoregulatory ability is crucial to survival in such habitats. This study examines gill microsomal Na,K-ATPase (K-phosphatase activity) kinetics and protein profiles in the freshwater shrimp Macrobrachium amazonicum when in fresh water and after 10-days of acclimation to brackish water (21 per thousand salinity), as well as potential routes of Na+ uptake across the gill epithelium in fresh water. On acclimation, K-phosphatase activity decreases 2.5-fold, Na,K-ATPase alpha-subunit expression declines, total protein expression pattern is markedly altered, and enzyme activity becomes redistributed into different density membrane fractions, possibly reflecting altered vesicle trafficking between the plasma membrane and intracellular compartments. Ultrastructural analysis reveals an intimately coupled pillar cell-septal cell architecture and shows that the cell membrane interfaces between the external medium and the hemolymph are greatly augmented by apical pillar cell evaginations and septal cell invaginations, respectively. These findings are discussed regarding the putative movement of Na+ across the pillar cell interfaces and into the hemolymph via the septal cells, powered by the Na,K-ATPase located in their invaginations.