Bioatividade de extratos de sisal (Agave Sisalana Perrine ex Engelm) sobre a oviposição de Ceratitis Capitata (Wiedemann, 1824) (DípTERA: Tephritidae).

O Brasil é terceiro maior produtor de frutas do mundo, perdendo apenas para a China e índia, produz frutas tropicais, subtropicais e temperadas. Um dos maiores problemas encontrados pela fruticultura internacional, são espécies de praga s pertencentes à família dos tefritídeos

Sistema de criação de caprinos em unidades agrícolas familiares.

Instalações; Suplementação mineral; Fornecimento de água; Manejo alimentar; Manejo reprodutivo; Descarte orientado; Comercialização de animais; Manejo sanitário Fitoerapia - Outra forma alternativa para o controle da verminose; Evolução dos rebanhos caprinos nos sistesmas modelo e satélites.bitstream/item/36201/1/Doc85.pd

Structural changes in intestinal enteroendocrine cells after ileal interposition in normal rats

INTRODUCTION: No therapeutic approach has significantly impacted the progression of diabetes. As early improvement of glicaemic control is observed after bariatric surgeries, there is currently a search for surgical procedures that can promote euglycemia also in non-obese patients. Glicaemic control can be achieved by increasing the blood concentration of GLP-1, a hormone produced by L cells that are more densely concentrated in the terminal ileum. The interposition of ileal segment to a more anterior region (proximal jejunum) can promote a greater stimulation of the L cells by poorly digested food, increasing the production of GLP-1 and reflecting on glicaemic control.
AIMS: To investigate long-term histological modifications of intestinal mucosa of rats submitted to interposition of ileum segment to a proximal region (jejunum).
METHODS: Forty 8-week old male Wistar-EPM1 rats (Rattus norvegicus albinus) were randomly distributed into 3 groups: the Interposition Group (IG) was subjected to ileal interposition, the Sham Group (SG) was subjected to sham operations, and the Control Group (CG) was not subjected to surgery. All animals were followed until the 60th postoperative day (8 postoperative week) when they were euthanized. Segments of jejunum and ileum from all groups were collected and analyzed by optical microscopy and immunohistochemistry.
RESULTS: No structural nor histological changes in intestinal L cells in the interposed intestinal segment and other intestinal segments were noted after ileal interposition surgery. 
CONCLUSION: As L cells endocrine characteristics were likely maintained, the use of metabolic surgical techniques for the treatment of metabolic diseases, especially diabetes, seems to be justified

The genome structure of Arachis hypogaea (Linnaeus, 1753) and an induced Arachis allotetraploid revealed by molecular cytogenetics.

Peanut, Arachis hypogaea (Linnaeus, 1753) is an allotetraploid cultivated plant with two subgenomes derived from the hybridization between two diploid wild species, A. duranensis (Krapovickas & W. C. Gregory, 1994) and A. ipaensis (Krapovickas & W. C. Gregory, 1994), followed by spontaneous chromosomal duplication. To understand genome changes following polyploidy, the chromosomes of A. hypogaea, IpaDur1, an induced allotetraploid (A. ipaensis × A. duranensis)4x and the diploid progenitor species were cytogenetically compared. The karyotypes of the allotetraploids share the number and general morphology of chromosomes; DAPI+ bands pattern and number of 5S rDNA loci. However, one 5S rDNA locus presents a heteromorphic FISH signal in both allotetraploids, relative to corresponding progenitor. Whilst for A. hypogaea the number of 45S rDNA loci was equivalent to the sum of those present in the diploid species, in IpaDur1, two loci have not been detected. Overall distribution of repetitive DNA sequences was similar in both allotetraploids, although A. hypogaea had additional CMA3+ bands and few slight differences in the LTR-retrotransposons distribution compared to IpaDur1. GISH showed that the chromosomes of both allotetraploids had preferential hybridization to their corresponding diploid genomes. Nevertheless, at least one pair of IpaDur1 chromosomes had a clear mosaic hybridization pattern indicating recombination between the subgenomes, clear evidence that the genome of IpaDur1 shows some instability comparing to the genome of A. hypogaea that shows no mosaic of subgenomes, although both allotetraploids derive from the same progenitor species. For some reasons, the chromosome structure of A. hypogaea is inherently more stable, or, it has been at least, partially stabilized through genetic changes and selection

Circumstellar disk accretion across the Lagoon Nebula: the influence of environment and stellar mass

Pre-main sequence disk accretion is pivotal in determining the final stellar properties and the early conditions for close-in planets. We aim to establish the impact of internal (stellar mass) and external (radiation field) parameters on disk evolution in the Lagoon Nebula massive star-forming region. We employ simultaneous $u,g,r,i,H\alpha$ time series photometry, archival infrared data, and high-precision $K2$ light curves, to derive stellar, disk, and accretion properties for 1012 Lagoon Nebula members. Of all young stars in the Lagoon Nebula, we estimate $34\%-37\%$ have inner disks traceable down to $\sim 12$ $\mu$m, while $38\%-41\%$ are actively accreting. We detect disks $\sim$1.5 times more frequently around G/K/M stars than higher-mass stars, which appear to deplete their inner disks on shorter timescales. We find tentative evidence for faster disk evolution in the central regions of the Lagoon Nebula, where the bulk of the O/B population is located. Conversely, disks appear to last longer at its outskirts, where the measured fraction of disk-bearing stars tends to exceed those of accreting and disk-free stars. The derived mass accretion rates show a non-uniform dependence on stellar mass between $\sim 0.2-5$ $M_\odot$. In addition, the typical accretion rates appear to differ across the Lagoon Nebula extension, with values two times lower in the core region than at its periphery. Finally, we detect tentative density gradients in the accretion shocks, with lags in the appearance of brightness features as a function of wavelength that can amount to $\sim7\%-30\%$ of the rotation period.Comment: 30 pages, 11 figures, two tables; accepted for publication in The Astronomical Journa

Adaptabilidade e estabilidade de variedades e híbridos de milho no Estado da Bahia.

Foram realizados dez ensaios de competição de variedades e de híbridos de milho, em cinco localidades, nas principais zonas produtoras de milho do Estado da Bahia, no ano agrícola de 1998, visando conhecer a adaptabilidade e a estabilidade desses materiais para fins de recomendação. Foram avaliados 25 variedades e 30 híbridos em blocos ao acaso, com três repetições. As análises de variância conjuntas evidenciaram diferenças entre as variedades e os híbridos, entre os locais, e um comportamento inconsistente das cultivares nas diferentes condições ambientais para os caracteres: altura da planta e da inserção da espiga, estande de colheita, número de espigas colhidas e peso dos grãos. As produtividades médias alcançadas com as variedades e os híbridos mostraram o potencial das regiões produtoras para o desenvolvimento da cultura do milho. Os híbridos expressaram melhor adaptação que as variedades e, dentre eles, destacaram-se Dina 1000, Pioneer 3021 e CargilI 909. A maioria dos híbridos mostrou uma alta estabilidade nos ambientes considerados. As variedades AL 30, CMS 50 e Sintético Dentado expressaram bom desempenho produtivo e se destacaram para os ambientes com boa tecnologia de produção. Entretanto, as variedades Sintético Duro, BR 5028- São Francisco, BR 5037 -Asa Branca, BR 50 l l-Sertanejo e CMS 453, que também expressaram boa adaptação, podem proporcionar melhoria na agricultura regional