scispace - formally typeset
Search or ask a question
Institution

Federal University of Mato Grosso do Sul

EducationCampo Grande, Brazil
About: Federal University of Mato Grosso do Sul is a education organization based out in Campo Grande, Brazil. It is known for research contribution in the topics: Population & Species richness. The organization has 6903 authors who have published 9030 publications receiving 78977 citations. The organization is also known as: UFMS & Federal University of Mato Grosso do Sul.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, a combination of screen-printed electrodes (SPEs), cetyltrimethylammonium bromide (CTAB), and a peak deconvolution procedure was employed to improve the sensitivity and selectivity in the simultaneous determination of three antioxidants in samples of biodiesel and cosmetic oils.
Abstract: The development of electroanalytical methods for determining three or more analytes simultaneously in a complex sample is highly desirable. Unfortunately, this is not an easy task in electrochemical studies of organic compounds, and alternative methods to achieve this goal have been increasingly sought in recent years. To this end, the present investigation employed a combination of screen-printed electrodes (SPEs), cetyltrimethylammonium bromide (CTAB), and a peak deconvolution procedure as an alternative approach to improve the sensitivity and selectivity in the simultaneous determination of three antioxidants in samples of biodiesel and cosmetic oils. The use of CTAB also prevents the occurrence of SPE fouling by matrix constituents, being essential in the simultaneous detection of the antioxidants tert-butylhydroquinone (TBHQ), propyl gallate (PG), and butylhydroxyanisole (BHA). Under optimized conditions, the limit of detection proved satisfactory, with relative standard deviations of 0.99% for TBHQ, 2.1% for PG, and 0.61% for BHA, indicating that the method has satisfactory repeatability. The approach was successfully applied to determine the target antioxidants in biodiesel samples at different concentrations after simple, rapid dilution, yielding recovery rates of 98–106% for TBHQ, 98–103% for PG, and 92–101% for BHA. In the analysis of cosmetic oils, a deconvolution procedure was applied to achieve separation of the oxidation peak potentials, with recovery rates of 94% for PG and 101% for BHA using the standard addition method. The results were satisfactory compared with those obtained using high-performance liquid chromatography.

31 citations

Journal ArticleDOI
TL;DR: Preliminary studies indicate the molecules do not disturb bacterial membranes and there activity is not directly linked to the generation of reactive oxygen species, and metabolic stability studies of the most promising compounds indicate stability towards phase I and phase II metabolizing enzymes.

31 citations

Journal ArticleDOI
TL;DR: The authors compare the use of saliva and sangre for determinar the TLM with concentraciones de so-dio (Na + ), potasio (K ), and lactato (LAC) en la saliva en ergometro debrazo and cicloergometro.
Abstract: RESUMENComparacion entre la utilizacion de saliva y sangre para ladeterminacion del lactato minimo en cicloergometro y ergo-metro de brazo en tenistas de mesa El objetivo de estudio fue el de verificar la posibilidad de deter-minar el test de lactato minimo (TLM) con concentraciones de so-dio (Na + ), potasio (K ) y lactato (LAC) en la saliva en ergometro debrazo y cicloergometro. Fueron participantes de este estudio ochotenistas de mesa de nivel internacional. Como estimulo anaerobi-co en el TLM en ambos ergometros, fueron utilizados tests maxi-mos de 30 segundos. En el ergometro de brazo isocinetico (CYBEXUBE 2432) fue aplicada la fuerza maxima con rotacion fija en 102rpm en el cicloergometro aplicando una carga de 7,5% del pesocorporal (Kp). Despues del estimulo anaerobico en el ergometrode brazo, fue iniciado un test incremental con rotaciones en lamanivela constante a 60 rpm, iniciando a 49 Watts con aumentode 16 Watts en cada etapa de 3 minutos del ejercicio. La intensi-dad correspondiente al TLM fue determinado con muestras desangre y saliva (LACmin

31 citations

Proceedings ArticleDOI
26 Jul 2009
TL;DR: From the consumer behavior pre-analysis, electrical energy companies will better direct its inspections and will reach higher rates of correctness on the cases of lower consumption resulted by fraud.
Abstract: This work presents two computational system for fraud detection for both high and low voltage electrical energy consumers based on data mining. This two kinds of consumers demanded different approaches and methodologies. The first is based on SOM (Self-Organizing Maps), which allows the identification of the consumption profile historically registered for a consumer, and its comparison with present behavior. The second is based on a hybrid of data mining techniques. From the consumer behavior pre-analysis, electrical energy companies will better direct its inspections and will reach higher rates of correctness. The validation and results showed that the two systems are efficient on the cases of lower consumption resulted by fraud.

31 citations

Journal Article
TL;DR: O arranjo espacial de plantas de soja em semeadura em linhas cruzadas pode contribuir para aumentar a produtividade de graos da cultura, justificando seu estudo experimental.
Abstract: O arranjo espacial de plantas de soja em semeadura em linhas cruzadas pode contribuir para aumentar a produtividade de graos da cultura, justificando seu estudo experimental. Dessa forma, o objetivo deste trabalho foi de avaliar a produtividade de graos e a severidade da ferrugem asiatica na cultura da soja submetida a diferentes densidades de semeadura e adubacao em linhas convencionais e cruzadas. Os tratamentos consistiram da combinacao de tres fatores e duas testemunhas adicionais. Para os fatores foram utilizados duas cultivares (Anta 82RR e M7211RR), duas dosagens de adubo de plantio (400 e 800 kg ha-1) e duas densidades (15 e 30 sementes por metro) em semeadura cruzada, e os dois tratamentos adicionais foram formados pela semeadura das duas cultivares em linhas nao cruzadas. O delineamento experimental utilizado foi um fatorial 2 x 2 x 2 + 2, distribuidos em blocos completos casualizados com quatro repeticoes. A soja em linhas cruzadas apresentou maior produtividade de graos, sendo a cultivar M7211RR superior nos dois sistemas de semeadura. A semeadura de soja cruzada e indicada com a cultivar M7211RR com 15 sementes por metro e 400 kg ha-1 de adubo. A severidade da ferrugem asiatica foi maior em semeadura cruzada para as duas cultivares. Em ambos os sistemas de semeadura, a severidade foi maior nos foliolos da metade inferior das plantas da cultivar Anta 82RR. O aumento do numero de sementes por metro linear, no sistema de semeadura em linhas cruzadas, reduziu a severidade da doenca apenas para a cultivar M7211RR.

31 citations


Authors

Showing all 6969 results

Network Information
Related Institutions (5)
Federal University of Paraná
46.6K papers, 546.5K citations

95% related

Universidade Federal de Minas Gerais
75.6K papers, 1.2M citations

95% related

Sao Paulo State University
100.4K papers, 1.3M citations

94% related

Universidade Federal do Rio Grande do Sul
89.4K papers, 1.4M citations

93% related

Universidade Federal de Santa Catarina
55.4K papers, 714.4K citations

93% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202324
2022121
20211,091
20201,252
2019971
2018844