Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2020 ( 17 )

2019 ( 192 )

2018 ( 201 )

2017 ( 227 )

Custom range...

Search Results: 1 - 10 of 204232 matches for " Edison P.;Maia "
All listed articles are free for downloading (OA Articles)
Page 1 /204232
Display every page Item
Identification of defensive compounds in metathoracic glands of adults of the stink bug Dichelops melacanthus (Hemiptera: Pentatomidae)
Marques, Francisco A.;Wendler, Edison P.;Maia, Beatriz Helena L. N. Sales;Ventura, Maurício U.;Arruda-Gatti, Iara Cintra;
Journal of the Brazilian Chemical Society , 2007, DOI: 10.1590/S0103-50532007000600020
Abstract: the contents of metathoracic glands of adults of the stink bug dichelops melacanthus (hemiptera: pentatomidae) were analyzed. compounds were identified by gas chromatography (gc), coupled gc-mass spectrometry and matching retention indices and mass spectra with those of authentic samples. tridecane was the major component followed by lesser and approximately equal amounts of (e)-4-oxo-2-hexenal and (e)-2-octenal. other compounds identified include (e)-2-hexenal, decane, (e)-2-hexenyl acetate, undecane, (e)-4-oxo-2-octenal, dodecane, (e)-2-octenyl acetate, 1-tridecene, tetradecane and pentadecane.
Formation and Radiation Acceleration of Pair Plasmoids Near Galactic Black Holes
Hui Li,Edison P. Liang
Physics , 1995, DOI: 10.1086/176833
Abstract: We study quantitatively the formation and radiation acceleration of electron-positron pair plasmoids produced by photon-photon collisions near Galactic black holes (GBHs). The terminal ejecta velocity is found to be completely determined by the total disk luminosity, proton loading factor and disk size, with no dependence on the initial velocity. We discuss potential applications to the recently discovered Galactic superluminal sources GRS1915, GROJ1655 and possibly other GBHs.
Jurnal Teknologi dan Industri Pangan , 2000,
Abstract: Volatile compounds of fresh water catfish (Pangasius sutchi) cultured in pond and cage were extracted by micro simultaneous distillation-solvent extraction (SDE), and analyzed by gas chromatography/mass spectrometry (GC/MS). A total of 28 volatile compounds of Pangastius sutchi were detected. Of these compounds, twelve were identified as aromatics, aldehyde and miscellaneous coumpounds. Catfish cultured in pond contained higher levels of the aromatic compunds as compared to thase raised in cage.
Dynamical Casimir effect with cylindrical waveguides
P. A. Maia Neto
Physics , 2004, DOI: 10.1088/1464-4266/7/3/012
Abstract: I consider the quantum electromagnetic field in a coaxial cylindrical waveguide, such that the outer cylindrical surface has a time-dependent radius. The field propagates parallel to the axis, inside the annular region between the two cylindrical surfaces. When the mechanical frequency and the thickness of the annular region are small enough, only Transverse Electromagnetic (TEM) photons may be generated by the dynamical Casimir effect. The photon emission rate is calculated in this regime, and compared with the case of parallel plates in the limit of very short distances between the two cylindrical surfaces. The proximity force approximation holds for the transition matrix elements in this limit, but the emission rate scales quadratically with the mechanical frequency, as opposed to the cubic dependence for parallel plates.
Analytical results on the Muller's ratchet effect in growing populations
Leonardo P Maia
Quantitative Biology , 2009, DOI: 10.1103/PhysRevE.79.032903
Abstract: Fontanari et al introduced [Phys. Rev. Lett. 91, 218101 (2003)] a model for studying the Muller's ratchet phenomenon in growing asexual populations. They studied two situations, either including or not a death probability for each newborn, but were able to find analytical (recursive) expressions only in the no-decay case. In this paper a branching process formalism is used to find recorrence equations that generalize the analytical results of the original paper besides confirming the interesting effects their simulations revealed.
A Study of South African Natural Zeolites Properties and Applications
Palesa. P. Diale,Edison Muzenda,Josephat Zimba
Lecture Notes in Engineering and Computer Science , 2011,
Procesos urbanos recientes en el área Metropolitana de Concepción: transformaciones morfológicas y tipologías de ocupación
Edison Salinas Varela,Leonel Pérez Bustamante
Revista de Geografía, Norte Grande , 2011,
Abstract: Para conocer los recientes procesos de ocupación metropolitanos se ha elaborado una metodología basada en la fotointerpretación de imágenes aéreas e información censal. Esta metodología se aplica en el área Metropolitana de Concepción (AMC), para los a os censales 1992 y 2002. Del análisis se obtienen mapas y tablas estadísticas que sintetizan aspectos relevantes del proceso de crecimiento de las áreas urbanas desde una perspectiva morfológica, así como las tipologías de ocupación de suelo urbano y el impacto que estas tienen sobre la variación de densidad de población urbana, a escala metropolitana y comunal. Los resultados muestran que durante el periodo de estudio el AMC tiene un crecimiento urbano importante, producto principalmente del consumo de suelo industrial y residencial, que a su vez impacta negativamente en la densidad de población urbana.
Complex mating behavior in Adelosgryllus rubricephalus (Orthoptera, Phalangopsidae, Grylloidea)
Zefa, Edison;Martins, Luciano de P.;Szinwelski, Neucir;
Iheringia. Série Zoologia , 2008, DOI: 10.1590/S0073-47212008000300006
Abstract: we describe the mating behavior of adelosgryllus rubricephalus mesa & zefa, 2004. in trials carried out in laboratory we verified the following mating sequence: (1) sexual recognition by antennation; (2) courtship with male turning his abdomen towards the female, performing mediolateral antennae vibration, jerking its body antero-posteriorly and stridulating intermittently, while receptive female drums on the male's abdomen tip, cerci and hind-tibia with her palpi or foretarsi; the male then stops and stays motionless for some seconds, extrudes the spermatophore and both restart the behavioral sequence described above; (3) copulation: male underneath female; with his tegmina inclined forward, and joins his genitalia to the female's to promote sperm transference ; the female steps off the male, occurring a brief end-to-end position; (4) postcopulation: without guarding behavior; male retains the spermatophore and eats it. we quantified elapsed time of each behavioral sequence and discussed its implications in the observed mating behavior.
Caracterización de la comunidad de mamíferos no voladores en las estribaciones orientales de la Cordillera del Kutukú, Amazonía Ecuatoriana
Zapata-Ríos,Galo; Araguillin,Edison; Jorgenson,Jeffrey P.;
Mastozoolog?-a neotropical , 2006,
Abstract: the eastern slopes of the andes in ecuador are considered among the global biodiversity "hotspots". although the region harbors a rich mammal fauna, few surveys of non-volant mammals have been conducted. this paper presents the results of an intensive survey of 11 months (november 2001 - september 2002) of the medium to large non-volant mammals in the upper mangosiza river basin, eastern slopes of the kutukú mountain range, southeastern ecuadorian amazon. using line transects, indirect records of tracks and signs, camera trapping, and interviews to local people, we recorded a total of 47 species of mammals (including 2 marsupials, 9 xenarthrans, 8 primates, 16 carnivores, 4 ungulates, 7 rodents, and 1 lagomorph).
High metal contents in coffee plant organs developed in tubets with different proportions of biosolid composts and carbonized rice hulls
Franco, Elias;Miglioranza, Edison;Fonseca, ésio de Pádua;
Brazilian Archives of Biology and Technology , 2004, DOI: 10.1590/S1516-89132004000400002
Abstract: the objective of this study was to analyze the effect of biosolid composts (bc) and carbonized rice hull (rh) on the production of coffea arabica l. cv catuaí vermelho seedlings (iac h 2077-2-5-99) grown in tubets. a totally randomized experimental design with five treatments and four replications was conducted in a nursery, to evaluate co, ni, cr, pb, cu, mn and zn contents in roots, stems and leaves. higher contents of cr, co, ni, pb, cu and zn were found in roots, while leaves carried the highest content of mn. zn in leaves went from average to high in plants developed in bc. in plants developed in rh. mn content was about four times higher than the adequate concentration. ni, co, cr, pb and cu contents found in leaves were considered normal, according to international standards. the best treatment for coffee seedling nutrition was 50% rh + 50% bc.
Page 1 /204232
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.