Biologia de Anastrepha grandis (Macquart, 1846) (Diptera: Tephritidae) sob diferentes temperaturas.

O trabalho teve como objetivo estudar o efeito de temperaturas constantes sobre a biologia de adultos de A. grandis

Development of Anastrepha grandis (Diptera: Tephritidae) under constant temperatures and field validation of a laboratory model for temperature requirements.

Made available in DSpace on 2017-10-07T10:27:23Z (GMT). No. of bitstreams: 1 DoriCropProtection.pdf: 388263 bytes, checksum: a3ea767cca77325b81595dffafaf5063 (MD5) Previous issue date: 2017-10-06bitstream/item/164710/1/Dori-Crop-Protection.pd

Influence of the Location of the Internal Temperature Control Loop on the Performance of the Dual Temperature Control for Feed Temperature Disturbance

A control strategy with distributed corrective action for distillation has been proposed and consists of a conventional dual temperature control combined with an additional column tray. In this work, we evaluated the influence of the location of this internal loop as part of the new proposal, compared to a conventional system. Tests were carried out in a 13-column tray distillation equipment and feed temperature was disturbed. Two different column trays from the stripping section were used (11 and 12) for internal decentralized temperature control, each one separately, plus the dual control of top and bottom temperatures. The results demonstrated that this proposed control approach with distributed corrective action is faster than the conventional one, regardless of the column tray in use. It was also determined that the internal loop close to the feed (disturbance) is more interesting as a way to minimize transients

Electrochemical and Scanning Force Microscopy Characterization of Fractal Palladium Surfaces Resulting from the Electroreduction of Palladium Oxide Layers

Pd oxide layers were grown by applying to smooth Pd electrodes a potential reversal technique (PRT) in 1 M H2SO4 at 25 °C. The electroreduction of the Pd oxide layer was made either voltammetrically or potentiostatically, yielding a Pd overlayer with a large increase in surface area. The effective range of PRT conditions for increasing the Pd surface area was established. The increase in surface area of treated Pd was voltammetrically determined. The electrochemical behavior of treated Pd electrodes in acid revealed an enhancement of the H atom surface electroadsorption processes. This behavior is consistent with the fractal characteristics of the treated Pd electrode surface, as demonstrated by the analysis of scanning force microscopy imaging data.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicada

Research on the Cultivation of Business English Talents and the Teaching Mode of Business English in Colleges for Nationalities

With the development of society, the strengthening of economic globalization and the deepening of reform and open-up, Business English teaching is attracting more and more attention. But Business English teaching in colleges for nationalities is still facing many problems, hinders the improvement of Business English teaching quality and the development of Business English. Starting from the connotation of Business English, this paper reveals the common problems existing in Business English teaching, analyzes the causes and puts forward some reform measures, in order to cultivate well-educated Business English talents for the ethnic areas

Anastrepha grandis: bioecologia e manejo.

bitstream/item/143905/1/Documento-404.pd

Mass-transport-induced kinetic transitions during the electrochemical formation of three-dimensional dendritic silver deposits under ohmic control

The influence of mass transport processes on the growth of three-dimensional dendritic Ag deposits on a Pt quasi-spherical substrate at a relatively large cathodic overpotential has been investigated. After a certain induction time a first stage of dendritic growth of Ag can be observed. The deposit formed at this stage exhibits a fractal surface and non-fractal mass—volume properties. For charge densities greater than a certain critical value, a second stage of growth can be distinguished. At this second stage the contribution of free convection changes the shape of the deposit. The fastest growth of the Ag electrodeposit is determined by the rate of migration of sulphate ions in the electric field. A model accounting for the parametric relationships derived from the experiments is presented.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicada