scholarly journals Determinação do teor de etanol na gasolina comercializada em postos de combustíveis do município de Picos-PI / Determination of ethanol content in gasoline marketed in fuel stations in the municipality of Picos-PI

2021 ◽  
Vol 4 (4) ◽  
pp. 5669-5678
Author(s):  
Francisca Dayane Ferreira Do Nascimento ◽  
Maria Jainne Santos Mendes ◽  
Janaina Adriana De Carvalho ◽  
Maria Alice de Sousa Vieira ◽  
Evilanny Dantas Costa ◽  
...  
Keyword(s):  
Mato Grosso ◽  
Ethanol Content

A gasolina automotiva é o combustível mais consumido no mundo, contudo, no Brasil, sua qualidade tem sido constante objeto de questionamento, principalmente no estado do Piauí. Uma análise realizada em 713 postos do estado do Piauí, em dezembro de 2011, pela Agência Nacional do Petróleo, Gás Natural e Biocombustíveis (ANP), revelou que 15,7% das amostras analisadas estavam adulteradas, representando um risco para o consumidor. O estado perdeu apenas para o Mato Grosso, que apresentou percentual de 17,4% de adulteração. Já no ano de 2012 o Piauí foi considerado o segundo pior estado do país em qualidade da gasolina comercializada aos seus consumidores. Diante do exposto esse trabalho teve como objetivo investigar a qualidade da gasolina comum e aditivada comercializada nos postos de combustíveis da cidade de Picos-PI. Foram coletadas amostras comercializadas em cinco postos de combustíveis localizados nos bairros Ipueiras, Bomba, Centro, Junco e Morrinhos. As análises foram realizadas no Laboratório de Pesquisa do IFPI- Campus Picos, onde foram analisadas quanto às características de aspecto e cor e teor de etanol anidro combustível na gasolina. As amostras de gasolina comum e aditivada analisadas apresentaram aspecto límpido e livre de impurezas. Observaram-se as cores laranja ou amarelo para gasolina comum e verde para gasolina aditivada, estando esses resultados dentro das especificações estabelecidas pela ANP. O teste do teor de etanol anidro revelou que dois postos apresentaram um teor de 27% de álcool etílico anidro combustível para as gasolinas comum e aditivada, e os demais postos um teor de 25%. Os valores encontrados estão de acordo com a legislação vigente, uma vez que não ultrapassam o valor de 27% de álcool etílico anidro, logo as gasolinas analisadas não estão adulteradas.

A simple, precise and cost-effective determination of ethanol content in gasohol through the ferroin-catalyzed Belousov-Zhabotinsky oscillating system

2019 ◽  
Vol 149 ◽  
pp. 104023
Author(s):  
Sira Sansuk ◽  
Wimonrat Tongphoothorn ◽  
Atchara Sirimungkala ◽  
Titikan Somboon
Keyword(s):  
Cost Effective ◽  
Ethanol Content

Der osmotische Wert als Parameter für Wachstum und Alkoholbildung bei Hefen/ The Osmotic Value as a Parameter of Growth and of Ethanol Formation in Yeast

1970 ◽  
Vol 25 (6) ◽  
pp. 606-610 ◽  
Author(s):  
G. Koppensteiner
Keyword(s):  
Amino Acids ◽  
Calibration Curve ◽  
Fermentable Sugars ◽  
Yeast Growth ◽  
Freezing Points ◽  
Ethanol Formation ◽  
Ethanol Content

The change of the osmotic value of different substances was observed during yeast growth by determination of the lowering of freezing-points. In shaken cultures with fermentable sugars the osmotic value at first increased and then decreased (effect of diauxy). Different attenuation degrees of raffinose (1/3, 3/3) as such reflected the osmotic value of the fermented medium. The diminuation of the osmotic value in liquid auxanograms showed distinctly whether the yeast had grown by utilizing the sugar or by using the carbon of amino acids or of reserve substances in the cell itself. By the aid of a calibration curve the ethanol content of a fermented medium may be determined exactly.

scholarly journals Identification of class 1 and 2 integrons from clinical and environmental Salmonella isolates

2014 ◽  
Vol 8 (12) ◽  
pp. 1518-1524 ◽  
Author(s):  
Fábio Ederson Lopes Corrêa ◽  
Fabiana Gomes da Silva Dantas ◽  
Alexeia Barufatti Grisolia ◽  
Bruno do Amaral Crispim ◽  
Kelly Mari Pires Oliveira
Keyword(s):  
Chain Reaction ◽  
Mato Grosso ◽  
Future Studies ◽  
Minimum Inhibitory Concentrations ◽  
Class 1 ◽  
Resistant Strains ◽  
Polymerase Chain ◽  
Different Sources ◽  
Mato Grosso Do Sul

Introduction: The indiscriminate use of antimicrobials has selected for the emergence of resistant strains. Many mechanisms contribute to the spread of antimicrobial-resistant genes, and integrons play a key role in this process. The aim of this study was to describe the serotypes and resistance profiles, and to characterize the presence of integrons in Salmonella strains isolated from Dourados, Mato Grosso do Sul, Brazil. Methodology: Thirty-six isolates from different sources were used. To evaluate the resistance profiles, the determination of minimum inhibitory concentrations together with polymerase chain reaction were used to screen for the presence of class 1 and class 2 integrons. Results: The Infantis serotype of Salmonella was the most frequently isolated serotype. Minimum inhibitory concentrations showed that out of the 36 isolates, 11 (30.5%) were resistant to all the antimicrobials tested. These resistant isolates were separated into three groups: 4 clinical isolates (36.4%), 3 food isolates (36.4%), and 4 water isolates (27.2%). Class 1 integrons occurred in 31 (86.1%) isolates and were found in all 11 resistant isolates (35.5 %) and in 20 (64.5%) of the non-resistant isolates. Class 2 integrons were found in 3 (8.3%) isolates, which were all non-resistant. Conclusion: The presence of an integron did not necessarily confer resistance. Future studies will seek to identify the mechanism behind integron-mediated antimicrobial resistance.

scholarly journals Development and validation of an environmentally friendly attenuated total reflectance in the mid-infrared region method for the determination of ethanol content in used engine lubrication oil

Talanta ◽  
2013 ◽  
Vol 109 ◽  
pp. 191-196 ◽  
Author(s):  
Rafael Rodrigues Hatanaka ◽  
Rodrigo Sequinel ◽  
Carlos Eduardo Gualtieri ◽  
Antônio Carlos Bergamaschi Tercini ◽  
Danilo Luiz Flumignan ◽  
...  
Keyword(s):  
Environmentally Friendly ◽  
Infrared Region ◽  
Attenuated Total Reflectance ◽  
Mid Infrared ◽  
Total Reflectance ◽  
Region Method ◽  
Ethanol Content ◽  
Lubrication Oil ◽  
Development And Validation

scholarly journals Use of buffer methods to estimate the potential acidity of Mato Grosso soils

2020 ◽  
Vol 44 ◽  
Author(s):  
Marcelo Ribeiro Vilela Prado ◽  
Milton Ferreira de Moraes ◽  
Fabrício Tomaz Ramos ◽  
Carlos Leandro Rodrigues do Santos ◽  
David Vilas Boas de Campos ◽  
...  
Keyword(s):  
Standard Method ◽  
Soil Analysis ◽  
Crop Productivity ◽  
The State ◽  
Buffer Solution ◽  
Mato Grosso ◽  
Santa Maria ◽  
Potential Acidity ◽  
Better Than

ABSTRACT Mato Grosso, with a total area of 903357 km², does not have an official methodology for estimating soil potential acidity (H + Al), and determination of H + Al using the standard method is onerous and time consuming. The objective of this study was to compare estimated values of H + Al determined using the standard calcium acetate method with those obtained using three buffer methods, namely, the Shoemaker, McLean, and Pratt (SMP) buffer, Sikora buffer, and Santa Maria buffer (SMB) methods, with samples of the main classes of cultivated soils in the state of Mato Grosso. A total of 196 soil samples were collected from the arable layer (0-20 cm) in agropastoral and adjacent native systems. Statistical models were obtained and compared with models used by laboratories that are hypothetically inadequate because there is no calibration for soils in the state. After laboratory analyses, the paired H + Al and equilibrium pH values corresponding to the equilibrium of each buffer solution (SMP buffer, SMB, and Sikora buffer) were subjected to nonlinear regression analysis (P < 0.05). The SMB method, which does not release pollutant residues into the environment, was better than the Sikora and SMP methods for replacing the standard method used in state laboratories for soil analysis, that is, H + Al (cm3 c dm-3) = 51.189 -25.70 ln(pHSMB) (R2 = 0.88, P < 0.0001). Thus, if laboratories use uncalibrated equations to estimate soil potential acidity, the recommended limestone correction will be underestimated or overestimated, which may compromise crop productivity in Mato Grosso.

scholarly journals Determination of Glyphosate in human urine from farmers in Mato Grosso-BR

2020 ◽  
Vol 3 ◽  
Author(s):  
Karolyne Gramlich De Melo ◽  
Siomara Regina Ferreira Jacobucci ◽  
Celia Regina Garlipp ◽  
Ângelo Zanaga Trape ◽  
Paulo César Pires Rosa
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Occupational Exposure ◽  
Health Risks ◽  
High Performance ◽  
Urine Samples ◽  
Mato Grosso ◽  
Rural Workers ◽  
Detection And Quantification

This study was conducted based on the evaluation of glyphosate levels present in rural workers in the region of Nova Mutum-MT. We analyzed 90 urine samples from farmers between 2017 and 2018. The samples were analyzed based on the development of the high-performance liquid chromatography (HPLC-FL) method. The results showed that 12% of the farmers presented glyphosate levels, but that the highest concentration determined by the method used was not above the limits allowed by Brazilian regulators. The HPLC-FL method proved to be practical and accurate for the determination of glyphosate in urine samples with limits of detection and quantification of 0.34 and 1.15ng/mL, respectively. These data show the importance of evaluating the occupational exposure of farmers to adopt strategies for the biomonitoring of this region, considering that casual exposures to pesticides can generate health risks, as well as cases of intoxication.

ETHANOL RECOVERY FROM PROPOLIS PRODUCTION WASTE USING ADSORPTION DISTILLATION METHOD

2021 ◽  
pp. 13-17
Author(s):  
MUHAMAD SAHLAN ◽  
LINDATIANA YULISTIONO ◽  
ASHADI SASONGKO ◽  
APRILIANA CAHYA KHAYRANI ◽  
KENNY LISCHER ◽  
...  
Keyword(s):  
Silica Gel ◽  
Synthetic Zeolite ◽  
Distillation Method ◽  
Adsorption Method ◽  
Study Objective ◽  
Ethanol Content ◽  
Initial Identification ◽  
Ethanol Recovery ◽  
By Products

Objective: This study objective to compare two adsorbents in the ability to recover ethanol in the propolis production by-product. Methods: Research methods include initial identification of the compound content in ethanol by-products of propolis production with GC/MS and determination of ethanol levels by GC-FID. The process of increasing ethanol content is carried out by the adsorption distillation method; the adsorbent used are synthetic zeolite 3A and white silica gel which has activated with the furnace. Results: The result obtained from the study is the initial ethanol content 27.5%. After the ethanol recycle process using synthetic zeolite 3A 30, 60, and 90 grams, it was obtained content 82.3%, 87.1%, and 90.9%. By using 30, 60, and 90 grams silica gel, it was obtained content 72.0%, 79.2%, and 82.2%. Conclusion: Based on these results it can be concluded that the ethanol content of the by-products of propolis production has been successfully increased by the distillation adsorption method with synthetic zeolite 3A 90 grams as the best result. The ethanol which recycling with this formulation has the characteristic odor of ethanol, which is very strong and does not has the characteristic odor of propolis.

Sign in / Sign up

Export Citation Format

Share Document