Botutatu: nova cultivar de amendoim (Arachis hypogaea L.)

Botutatu is a new released peanut cultivar, selected from the Brazilian cultivar Tatu by progeny testing. It belongs to Valencia type and has similar characteristics of cultivar Tatu, differing from the late by being 23.7% superior in pod yield.

Plantas do cerrado brasileiro com atividade contra Mycobacterium fortuitum

Mycobacterium fortuitum is a rapidly-growing species of bacteria, ubiquitous in the environment and related to important human mycobacterioses. It has been isolated from blood, abscesses, the endocardium and surgical and traumatic wounds. This mycobacterium is hard to treat, being recognized in the literature as resistant even to the drugs used in the treatment of tuberculosis. The objective of this study was to screen extracts prepared from plants of the Brazilian cerrado (extended savanna-like belt) with known activity against M. fortuitum, employing the Microplate Alamar Blue Assay (MABA) as the analytical method. Out of 26 extracts tested against M. fortuitum, the nonpolar extract of Quassia amara (in methylene dichloride) gave the best result (MIC 62.5μg/ mL), followed by the nonpolar extracts of Syngonanthus macrolepsis, Davilla elliptica and Turnera ulmifolia, with equal MICs of 125μg/ml. The polar extracts (in ethanol and methanol) obtained from the same plants were considered inactive, since the MIC values determined were above 500μg/mL and not significantly different from those of extracts from other plants, without known activity.

Bioprospecção de atividade antioxidante e antimicrobiana da casca de Stryphnodendron adstringens (Mart.) Coville (Leguminosae-Mimosoidae)

The aim of this work was to evaluate the class of secondary metabolites responsible for the antioxidant and antimicrobial activities of bark extracts of Stryphnodendron adstringens (Mart.) Coville (Leguminosae-Mimosoidae), a plant widely used in folk medicine in Brazil. Extracts of the bark were prepared with 50% ethanol, 70% ethanol, acetone:water (7:3, v/v) and chloroform. Antioxidant activity was prospected by spraying thin-layer chromatographs of the extracts with 2,2-diphenyl-1-picryl-hydrazyl (DPPH) and measuring the DPPH radical scavenging capacity by spectrophotometry. Antibacterial activity was revealed by the agar diffusion method and bioautography. TLC spots assigned to tannins in the polar extracts showed antioxidant activity by DPPH radical scavenging and the chloroform extract showed the least scavenging activity. Antimicrobial activity was indicated by the bacterial growth inhibition haloes around polar extracts and bioautography showed activity in the TLC spots assigned to tannins. It was concluded that polar extracts of the bark of S. adstringens possessed antioxidant and antimicrobial activities which were due to secondary metabolite derived from the tannin class, which are the main constituent of these bark extracts, according to the literature.

In vitro evaluation of the effect of natural orange juices on dentin morphology

The patient's diet has been considered an important etiological factor of dentin hypersensitivity. The frequent ingestion of acidic substances can promote the loss of dental structure or remove the smear layer. The purpose of this study was to evaluate the degree of smear layer removal and dentinal tubules exposure by different natural orange juices. Extracted human teeth were submitted to manual scaling in order to develop the smear layer. Seventy dentin samples were obtained and distributed into the following groups: Control, lime orange, lime, valência orange, navel orange, mandarin, and tangerine. Each group included 2 methods of application: Topical and topical + friction. After preparation for SEM analysis, photomicrographs were assessed by a blind calibrated examiner using an index system. The Kruskal-Wallis test indicated a significant influence of the orange juices on smear layer removal. Significant difference was observed between navel orange, valência orange, mandarin and the control group (p < 0.05). These orange juices resulted in greater removal of the smear layer and greater opening of dentinal tubules. The comparison between the application methods for each group using the Mann-Whitney test showed that friction increased smear layer removal significantly only for lime orange and lime. The data suggest that certain natural orange juices are more effective in terms of smear layer removal and dentinal tubules exposure than others.

Posicionamento de Extratores de Cápsula Porosa em Solo Arenoso Na Citricultura Fertirrigada Por Gotejamento

The efficiency of monitoring fertigation by means of porous capsule extractors is directly related to its correct placement, since the nutrients applied through fertigation have different mobility throughout the soil profile. The objective of this study was to evaluate the distributions of NO3, P, and K in the soil solution, when applied in citrus in sandy soil through drip fertigation systems, aiming to define the proper placement of the solution extractors. In order to measure the concentration of ions in the soil solution, the extractors were installed at four different distances (5, 15, 25, and 35 cm) and depths (15, 30, 60, and 90 cm) with an emitter located under the projection of the tree canopy. The experiment was conducted in a Valencia orange orchard on citrumelo Swingle rootstock, in Reginópolis/SP. The experimental design was randomized blocks and the treatment arrangement was a 4 x 4 factorial design with five repetitions. Sixteen soil solution extractors were installed per block, with a total of 80 extractors in the experiment. According to the obtained results, to determine P and K, it is recommended to install the solution extractor at 15 cm horizontal and 30 cm depth from the emitter. For NO3, the extractor recommended placement is 25 cm horizontal and 30 cm depth. The soil solution extractor proved to be a sensitive tool, capable of determining the ions mobility in the wet bulb.

Estudo por dinâmica molecular da estabilidade conformacional de dímeros do peptídeo Eumenine mastoparan-AF em água e mistura TFE-água

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo conformacional de polianfóteros fracos utilizando simulações de Monte Carlo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Interação do peptídeo MP-I com micela de SDS em solução aquosa: um estudo por dinâmica molecular

Pós-graduação em Biofísica Molecular - IBILCE

Efeito da adição de nanopartículas na biolixiviação da calcopirita ('CU''FE''S IND.2') por Acidithiobacillus ferrooxidans LR

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Fabricação e caracterização morfológica de filmes layer-by-layer de DODAB/FTALOCIANINA de níquel

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fases magnéticas em compostos Er'Co IND. x''Mn IND. 1-x''O IND> 3+ou - δ'

Pós-graduação em Ciência e Tecnologia de Materiais - FC

Influência da variedade e região de cultivo sobre compostos bioativos, atividade antioxidante e cor de laranjas de polpa vermelha

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Cônicas e aplicações

Pós-graduação em Matemática Universitária - IGCE

Transmissibilidade da leprose das cercas-vivas, quebra-ventos e plantas daninhas para citros através de Brevipalpus phoenicis (Geijskes, 1939) (Acari: Tenuipalpidae)

Pós-graduação em Agronomia (Entomologia Agrícola) - FCAV

Avaliação dos mecanismos de ação envolvidos nas atividades antiulcerogênica e cicatrizante do extrato etanólico obtido a partir das folhas de Terminalia catappa L. (COMBRETACEAE)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)