A5082731446- Insect Pest Control Strategies
- Essential Oils and Antimicrobial Activity
- Biodiesel Production and Applications
- Enzyme Catalysis and Immobilization
- Lubricants and Their Additives
- Phytochemistry Medicinal Plant Applications
- Insect and Pesticide Research
- Ginger and Zingiberaceae research
- Analytical chemistry methods development
- Surfactants and Colloidal Systems
- Science and Education Research
- Petroleum Processing and Analysis
- Agricultural and Food Sciences
- Plant Pathogens and Fungal Diseases
- Heavy Metals in Plants
- Phytochemistry and Bioactivity Studies
- Food, Nutrition, and Cultural Practices
- Food Chemistry and Fat Analysis
- Water Quality and Pollution Assessment
- Phytochemical compounds biological activities
- Analytical Methods in Pharmaceuticals
- Muscle metabolism and nutrition
- Plant biochemistry and biosynthesis
- Process Optimization and Integration
- Environmental Sustainability and Education
Universidade Federal do Maranhão
2009-2023
Universidade Federal da Paraíba
2009-2010
In the present study, synthesis of fatty acid esters from castor oil using an alkaline catalyst was optimized. The variables reaction time, amount and oil:ethanol molar ratio were studied a central composite rotatable design. effects significance models on response variable ethyl biodiesel yield derived pure evaluated surface curve analysis variance. All significantly affected yield, being most effective. highest obtained 1:11, 1.75% KOH time 90 min.
This work evaluates the physical-chemical properties of essential oil dryfloral buds clove (Syzygium aromaticum) that are found in Municipality Saint Louis, Maranhao. The was quantitatively extracted by hydrodistillation.The physicochemical (density, refractive index,solubility, color and appearance) cytotoxic activity against larvae Artemia salinaa were determined. analytically characterized gas chromatography coupled to mass spectrometer (GC-MS). results show best timeand yield...
Aedes aegypti mosquito arouses the interest of public authorities, as it is a vector for four diseases (dengue, zika, chikungunya, and yellow fever) one ways to combat through insecticides. In this study, main constituent, predominant class essential oil extracted from husks Citrus limonia Osbeck was identified evaluated know if has biological activity against larvae in third stage Ae.aegypti. gas chromatography coupled with mass spectrometry (CG-MS); larvicidal described by World Health...
In this present work, we tested the larvicidal activity, molluscicide and toxicity of oil extracted from Citrus limon peels, respectively against third stage larvae Aedes aegypti, snail Biomphalaria glabrata, Artemia salina. For this, extract essential by hydrodistillation. Then, identified quantified components gas chromatography coupled to mass spectrometry (GC-MS). We molluscicidal respectively, using method adopted Brazilian Ministry Health World Organization. calculated lethal...
Maranhão state in Brazil presents a big potential for the cultivation of several oleaginous species, such as babassu, soybean, castor oil plant, etc... These vegetable oils can be transformed into biodiesel by transesterification reaction an alkaline medium, using methanol or ethanol. The production from blend these alcohols is way adding technical and economical advantages to environmental optimized alcohol was observed methanol/ethanol volume ratio 80 % MeOH: 20 EtOH. ester content 98.70...
In this present work, it was tested the linalool pattern and essential oil extracted from Aniba duckei Kostermans (rosewood) branches against fungi Colletotrichum gloesporioides Fusarium oxysporum. To do this, we by hydrodistillation identified quantified components gas chromatography coupled to mass spectrometry (GC/MS). We obtained isolated routine plating method hose okra plants, respectively. The results of chromatographic analysis showed that had 93.60 % 3.03 cis-linalool oxide....
Este trabalho determina a toxicidade e o efeito moluscicida do óleo extraído das folhas de Cinnamomum zeylanicum Blume contra caramujo Biomphalaria glabrata (Say, 1818). Para isso, essencial foi quantitativamente por hidrodestilação. Em seguida, quantificações seus componentes foram realizadas cromatografia gasosa acoplada espectrometria massas (CG-MS) atividade testadas, respectivamente, Artemia salina caramujos A concentração letal (CL50) calculada partir dos métodos Reed-Muench &...
Dengue, zika virus and chicungunya are diseases transmitted by the bite of female mosquito Aedes aegypti Linn. Because this, these pose a public health problem, especially in tropical countries. To date, there no specific vaccines that act against different serotypes disease. In this way, measures adopted to combat it restricted control mosquito. This is done using larvicide chemicals insecticides, whose main component organophosphorus, such as Temephos pyrethroids. However, frequent use...
AbstractIn this present study, we describe the chemical composition, larvicidal and molluscicidal activity of essential oil distilled from Alpinia zerumbet leaves against third-stage larvae Ae.aegypti snail Biomphalaria glabrata, respectively. For this, by hydrodistillation, identified its components gas chromatography coupled to mass spectrometry with flame ionization detection calculated lethal concentration using probit method. From these analyses, showed that is predominantly composed...
Maranhão state in Brazil presents a big potential for the cultivation of several oleaginous species, such as babassu, soybean, castor oil plant, etc... These vegetable oils can be transformed into biodiesel by transesterification reaction an alkaline medium, using methanol or ethanol. The production from blend these alcohols is way adding technical and economical advantages to environmental optimized alcohol was observed methanol/ethanol volume ratio 80 % MeOH: 20 EtOH. ester content 98.70...
This work evaluated the molluscicidal activity of essential oil Zingiber officinale Roscoe rhizomes in with Biomphalaria glabrata species. The was isolated quantitatively by hydrodistillation and characterized analytically gas chromatography coupled to mass spectrometry LC50 calculated from methods Reed-Muench & Pizzi, respectively. From this, 18 components were identified, main ones being A-zingiberene, geranial nerolidol. obtained 56.23 mg.L-1 mortality snails concentration 75 72 hours. It...
A pesquisa descreve a reação espectrofotométrica do complexo Cu(II)–PAN (1-(2-piridilazo)-2-naftol) e determina concentração de cobre (II) em aguardente mandioca (tiquira). Para isso, dimensionamos para os estudos absorção complexo, pH, estabilidade, proporção estequiométrica, interferentes, correlação recuperação. Após essa etapa, determinamos cobre(II) cinco amostras bebidas destiladas artesanalmente municípios Estado Maranhão. O resultados mostram que o absorve 548 nm pH 6, é estável um...
We determined the chemical composition and explored hypothesis that essential oil of fruits Pimenta dioica inhibits mycelial development fungi Fusarium oxysporum f. sp. lycopersici, F. passiflorae, subglutinans ananas , vasinfectum e Cubense. To do this, we extracted by hydrodistillation, identified its components gas chromatography coupled to mass spectrometry (GC-MS) fungal activity against five special forms species. The results showed had 76.88% eugenol inhibited up 97.78% in an average...
In this work, we tested the preservative action of essential oil oregano (Origanum vulgare L) (OEO) in sururu (Mytella charruana) natura.In order to do this, extracted by hydrodistillation and then identified components gas chromatography coupled mass spectrometry (CG-MS) for activity, performed counts Escherichia coli, mesophilic total bacteria, volatile bases, pH sururu.The result chromatographic analysis showed that largest component was carvacrol lowest 1,4 methanoazulene.The addition...
Determinamos a composição química e testamos toxicidade atividade moluscicida do óleo essencial extraído das cascas Citrus sinensis (L.) Osbeck. Para isso, o foi quantitativamente por hidrodestilação. Em seguida, as quantificações de seus componentes foram realizadas cromatografia gasosa acoplada à espectrometria massas (CG-MS) testadas, respectivamente, contra Artemia salina caramujos Biomphalaria glabrata. Os resultados mostraram que contém 81,50% D-limoneno (constituinte principal) 0,06%...
Neste trabalho é descrito o preparo e a caracterização físico-química de combustíveis base microemulsões, formadas por óleo babaçu, álcool, água, aguardente comercial tensoativo. Inicialmente, foram construídos os diagramas fases pseudoternário para obter as condições máxima solubilização dos componentes. Em seguida, preparadas microemulsões partir do álcool etílico 40%, isobutanol. Foi determinada viscosidade cinemática, condutividade elétrica ponto fulgor das conforme normas da American...
Aim: We determined the chemical composition and larvicidal activity of essential oil distilled from Citrus sinensis (L.) Osbeck husks pattern major constituent. Materials methods: For this, we distill by hydrodistillation, identify components gas chromatography coupled with mass spectrometry (GC-MS), test against Aedes aegypti calculate lethal concentration at 50% (LC50) Reed-Muench method confidence interval Pizzi for both standard. Results: it showed that consists mostly limonene (LC50...
A balneabilidade é um parâmetro importante para garantir a qualidade do rio atividades recreativas, sendo uma ferramenta que possibilita minimizar riscos à saúde humana. bacia hidrográfica Turiaçu importante, vez atravessa o município de Santa Helena e, até onde se sabe, não há dados relacionados neste município. Portanto, este trabalho teve como objetivo identificar os pontos banhos e despejo esgoto às margens através pesquisa in loco. Além disso, aborda quali-quantitativa realizada com...
According to the Resolution number 7 from Brazilian National Agency of Oil, Natural Gas and Biofuels (ANP), official methodologies for free glycerin determination in biodiesel are ASTM D 6584, EN 14105 14106 methods. However, these procedures limited analysis methyl esters they not suitable lauric oils. In present work, a gas chromatographic method was developed amount ethyl oils, aiming at overcoming limitations Moreover, can also be used ethanol methanol samples other oily sources....