Plasma Dc
Mostrando 1-12 de 96 artigos, teses e dissertações.
-
1. A newly validated HPLC–DAD-UV method to study the effects of medicinal plants extracts, fractions and isolate compounds on gastric emptying in rodents
Abstract In this study, we developed and validated a chromatographic method by High-performance Liquid Chromatography coupled to Diode-Array Ultraviolet Detector for quantification of acetaminophen in small volumes of plasma. This analytical method is particularly suitable for studies of gastric emptying time and pharmacokinetics in small rodents. Orally adm
Rev. bras. farmacogn.. Publicado em: 09/12/2019
-
2. Changing the characteristics of the nitrided layer using three different plasma configurations
ABSTRACT Direct current (DC) plasma nitriding offers some disadvantages, especially in parts with complex geometries, where the presence of edges is significant, such as gears, molds, and needle punched parts are strongly affected by this effect, leading to irregular formation of nitrided layers and high variation in surface hardness. To solve these problems
Matéria (Rio J.). Publicado em: 10/06/2019
-
3. Chemical characterization and bioactive compounds of an unconventional vegetable - Erechtites valerianifolia (Wolf) DC.
Abstract Erechtites valerianifolia (Wolf) DC is an unconventional vegetable found in the Brazilian Atlantic Forest. Is consumed in high proportions by the population living in this biome. The objective of this study was to investigate the general chemical composition, occurrence and content of carotenoids, vitamins (C and E) and minerals in this vegetable. B
Food Sci. Technol. Publicado em: 27/05/2019
-
4. Mass Spectrometry Study of Ammonia Formed During Plasma Nitrocarburizing and Nitriding Processes
In this work, we used mass spectrometry to investigate ammonia (NH3) formed during the nitrocarburizing and nitriding processes of α-Fe sintered and low alloy steel by using d.c. glow discharges in different N2/H2/CH4 gas concentration mixtures. Experiments were conducted using two different configurations: one to collect and analyze species probed primaril
Mat. Res.. Publicado em: 16/07/2018
-
5. BaltDC: purification, characterization and infrared spectroscopy of an antiplatelet DC protein isolated from Bothrops alternatus snake venom
Abstract Background: Snake venoms are a complex mixture of proteins, organic and inorganic compounds. Some of these proteins, enzymatic or non-enzymatic ones, are able to interact with platelet receptors, causing hemostatic disorders. The possible therapeutic potential of toxins with antiplatelet properties may arouse interest in the pharmacological areas.
J. Venom. Anim. Toxins incl. Trop. Dis. Publicado em: 08/02/2018
-
6. Construction and measurement of an electromagnetic noise generator based on an automotive coil
This article covers the design of an electromagnetic noise generator which uses an automotive coil as the main component. A short theoretical analysis covers the generation of high voltage pulsed current from the available DC source originated from the battery. An electronic dimmer, a circuit used to control the brightness of a light, by controlling the effe
Rev. Bras. Ensino Fís.. Publicado em: 22/06/2017
-
7. Optical and Electrical Properties of Chemical Bath Deposited Cobalt Sulphide Thin Films
Cobalt sulphide (CoS) thin films were synthesized using the Chemical Bath Deposition (CBD) technique. X-ray diffraction (XRD) analysis was used to study the structure and the crystallite size of CoS thin film. Scanning Electron Microscope (SEM) studies reveal the surface morphology of these films. The optical properties of the CoS thin films were determined
Mat. Res.. Publicado em: 24/11/2016
-
8. Screening for primary aldosteronism in an argentinian population: a multicenter prospective study
Objectives Primary aldosteronism (PA) is characterized by the autonomous overproduction of aldosterone. Its prevalence has increased since the use of the aldosterone (ALD)/plasma renin activity (PRA) ratio (ARR). The objective of this study is to determine ARR and ARC (ALD/plasma renin concentration ratio) cut-off values (COV) and their diagnostic concordanc
Arch. Endocrinol. Metab.. Publicado em: 24/07/2015
-
9. Improving the Abrasive Wear Resistance of a Microalloyed Steel by Plasma Nitriding
The aim of this work was to study the micro-abrasive wear resistance of an API 5L X-70 microalloyed steel plasma nitrided under different conditions of time and temperature. Pulsed DC plasma nitriding experiments were performed under a treatment atmosphere of 10%N2 + 90%H2, at temperatures of 410, 440 and 470 °C and for nitriding times of 1, 3 and 5h. The r
Mat. Res.. Publicado em: 2015-04
-
10. Plasma Carburizing of Sintered Pure Iron at Low Temperature
In this work, plasma carburizing of sintered pure iron at low temperature was investigated. Samples were carburized under a dc abnormal glow discharge in two mixed atmospheres (5%CH4 + 95%H2 and 20%CH4 + 80%H2) at 500 °C and 700 °C for 3 and 6 hours. The influence of these parameters was investigated by Scan Electron Microscopy (SEM), X-ray Diffraction (DR
Mat. Res.. Publicado em: 2015-04
-
11. Associação de palma forrageira com feno de maniçoba ou silagem de sorgo e duas proporções de concentrado na dieta de vacas em lactação
Objetivou-se avaliar a utilização da silagem de sorgo, feno de maniçoba e duas proporções de concentrado (10 e 15% na MS) em dietas à base de palma forrageira na alimentação de vacas em lactação. Foram utilizadas oito vacas da raça Girolando, com peso vivo médio e produção inicial de 463 e 9,65kg, respectivamente, com 95 dias de lactação. O d
Arq. Bras. Med. Vet. Zootec.. Publicado em: 2015-02
-
12. Characterization of TiCN thin films deposited by Dc-Pulsed PACVD using methane precursor
Titanium carbonitride (TiCN) thin films were deposited on hot-work steel (DIN 1.2606) by plasma-assisted chemical vapor deposition (PACVD) and the influence of different CH4/ (CH4+N2) gas flow ratio, on the layer mechanical properties, were investigated. SEM studies indicated that the growth rate is decreased by increasing the CH4/ (CH4+N2) gas flow ratio. I
Mat. Res.. Publicado em: 2014-12