Universidade de Ribeirão Preto

About: Universidade de Ribeirão Preto is a education organization based out in Ribeirão Preto, Brazil. It is known for research contribution in the topics: Population & Humanities. The organization has 840 authors who have published 913 publications receiving 12089 citations. The organization is also known as: University of Ribeirão Preto.

The genome sequence of the plant pathogen Xylella fastidiosa

Abstract: Instituto Ludwig de Pesquisa sobre o Câncer, Rua Prof. Antonio Prudente, 109-4 andar, 01509-010, Sao Paulo-SP

Formation and stability of oil-in-water nanoemulsions containing rice bran oil: in vitro and in vivo assessments

Abstract: Nanoemulsions have practical application in a multitude of commercial areas, such as the chemical, pharmaceutical and cosmetic industries. Cosmetic industries use rice bran oil in sunscreen formulations, anti ageing products and in treatments for skin diseases. The aim of this study was to create rice bran oil nanoemulsions using low energy emulsification methods and to evaluate their physical stability, irritation potential and moisturising activity on volunteers with normal and diseased skin types. The nanoemulsion developed by this phase diagram method was composed of 10% rice bran oil, 10% surfactants sorbitan oleate/PEG-30 castor oil, 0.05% antioxidant and 0.50% preservatives formulated in distilled water. The nanoemulsion was stable over the time course of this study. In vitro assays showed that this formulation has a low irritation potential, and when applied to human skin during in vivo studies, the nanoemulsion improved the skin's moisture and maintained normal skin pH values. The results of irritation potential studies and in vivo assessments indicate that this nanoemulsion has potential to be a useful tool to treat skin diseases, such as atopic dermatitis and psoriasis.

Analysis and functional annotation of an expressed sequence tag collection for tropical crop sugarcane.

Abstract: To contribute to our understanding of the genome complexity of sugarcane, we undertook a large-scale expressed sequence tag (EST) program. More than 260,000 cDNA clones were partially sequenced from 26 standard cDNA libraries generated from different sugarcane tissues. After the processing of the sequences, 237,954 high-quality ESTs were identified. These ESTs were assembled into 43,141 putative transcripts. Of the assembled sequences, 35.6% presented no matches with existing sequences in public databases. A global analysis of the whole SUCEST data set indicated that 14,409 assembled sequences (33% of the total) contained at least one cDNA clone with a full-length insert. Annotation of the 43,141 assembled sequences associated almost 50% of the putative identified sugarcane genes with protein metabolism, cellular communication/signal transduction, bioenergetics, and stress responses. Inspection of the translated assembled sequences for conserved protein domains revealed 40,821 amino acid sequences with 1415 Pfam domains. Reassembling the consensus sequences of the 43,141 transcripts revealed a 22% redundancy in the first assembling. This indicated that possibly 33,620 unique genes had been identified and indicated that >90% of the sugarcane expressed genes were tagged.

A comparative study of physicochemical properties of AH PlusTM and EpiphanyTM root canal sealants

Abstract: Aim To evaluate setting time, solubility and disintegration, flow, film thickness, and dimensional change following setting in a dual-cured resin root canal sealer EpiphanyTM compared with an epoxy-resin-based sealer AH PlusTM. Methodology The experiments were performed according to ANSI/ADA Specification 57 which tests the physicochemical properties of endodontic sealing materials. Five samples of each material were tested for each of the properties. In addition, deionized distilled water from the solubility test of EpiphanyTM was submitted for analysis of the cations Fe, Ni, Ca, Mg, Zn, Na, and K in an atomic absorption spectrometer. Three samples were analysed. Results There were no statistical differences (P > 0.05) in flow (AH PlusTM: 38.57 mm; EpiphanyTM: 35.74 mm) and film thickness (AH PlusTM: 10.6 μm; EpiphanyTM: 20.1 μm). The solubility (AH PlusTM: 0.21%; EpiphanyTM: 3.41%) and dimensional alterations following setting (AH PlusTM: expansion of 1.3%; EpiphanyTM: expansion of 8.1%) were statistically different (P < 0.05). The setting times of both sealants were in accordance with ANSI/ADA requirements. Conclusions Setting time, flow, and film thickness tests for both cements conformed to ANSI/ADA standards. Dimensional alteration test for both cements were greater than values considered acceptable by ANSI/ADA. EpiphanyTM values regarding solubility were also greater than values considered acceptable by ANSI/ADA.