Papers by Esmael Dias Prado
Insects, Jan 30, 2018
Aedes aegypti (Ae. aegypti) is a competent vector for transmitting important viral diseases such ... more Aedes aegypti (Ae. aegypti) is a competent vector for transmitting important viral diseases such as yellow fever, dengue, chikungunya, and Zika. Several strategies have been applied to avoid Ae. aegypti proliferation by using environmental management, biological, and chemical approaches. However, the development of new methods for effective control of the insect vector population is still needed. Photodynamic control is an alternative way to control the vector population by using a physical approach based on the larval phototoxicity of a photosensitizer. In this context, the present study evaluated the use of eosin-methylene blue (EMB) as a new photosensitizer for photodynamic control of Ae. aegypti larval populations. The photodynamic assays were performed submitting Ae. aegypti third-instar larvae to different EMB concentrations (0.0, 0.5, 1.0, 5.0, 10.0, 50.0, and 100.0 µg mL −1) in combination of three different light doses (24.3, 48.6, and 97.2 J cm −2) under either white-light radiation from RGB LEDs or sunlight. The results demonstrated that EMB presented a rapid internalization into the larvae and was phototoxic. The photodynamic action induced 100% of larval mortality after about 40 min of sunlight irradiation even using low EMB concentration (0.5 µg mL −1). The findings reveal EMB as an effective photoactive compound to control larval populations of Ae. aegypti by photodynamic process induced by either sunlight or white-light from RGB LEDs.
Insects, 2018
Aedes aegypti (Ae. aegypti) is a competent vector for transmitting important viral diseases such ... more Aedes aegypti (Ae. aegypti) is a competent vector for transmitting important viral diseases such as yellow fever, dengue, chikungunya, and Zika. Several strategies have been applied to avoid Ae. aegypti proliferation by using environmental management, biological, and chemical approaches. However, the development of new methods for effective control of the insect vector population is still needed. Photodynamic control is an alternative way to control the vector population by using a physical approach based on the larval phototoxicity of a photosensitizer. In this context, the present study evaluated the use of eosin-methylene blue (EMB) as a new photosensitizer for photodynamic control of Ae. aegypti larval populations. The photodynamic assays were performed submitting Ae. aegypti third-instar larvae to different EMB concentrations (0.0, 0.5, 1.0, 5.0, 10.0, 50.0, and 100.0 µg mL−1) in combination of three different light doses (24.3, 48.6, and 97.2 J cm−2) under either white-light r...
Revista Ciencias Técnicas Agropecuarias, 2008
El objetivo de este trabajo fue desarrollar un penetrógrafo electromecánico de bancada, con veloc... more El objetivo de este trabajo fue desarrollar un penetrógrafo electromecánico de bancada, con velocidad constante de penetración, destinado a realizar pruebas de resistencia a la penetración de suelos con la estructura preservada. El aparato posee un sistema mecánico de elevación, destinado a transformar el movimiento rotacional del motor de paso en lineal del asta, un sistema de control del motor, una célula de carga, un sistema automático de adquisición de datos y un chasis. El torque y rotación del sistema se mantuvieron constante, usando un drive conectado al motor. La interface fue realizada usando el software DIAS, con salida para un display de cristal líquido LCD 16x2 y botones de comando. Para verificar la exactitud de los datos obtenidos con el uso del penetrógrafo desarrollado, fueron realizados ensayos en muestras de suelo Latosólico Rojo Distroférrico, y sus datos comparados con los obtenidos de un penetrógrafo padrón. El equipamiento desarrollado presentó una satisfactori...
Resumen pt: Este trabalho teve por objetivo desenvolver um penetrografo eletromecânico de bancada... more Resumen pt: Este trabalho teve por objetivo desenvolver um penetrografo eletromecânico de bancada, com velocidade constante de penetracao, destinado a realizacao de...
Insects
Aedes aegypti (Ae. aegypti) is a competent vector for transmitting important viral diseases such ... more Aedes aegypti (Ae. aegypti) is a competent vector for transmitting important viral diseases such as yellow fever, dengue, chikungunya, and Zika. Several strategies have been applied to avoid Ae. aegypti proliferation by using environmental management, biological, and chemical approaches. However, the development of new methods for effective control of the insect vector population is still needed. Photodynamic control is an alternative way to control the vector population by using a physical approach based on the larval phototoxicity of a photosensitizer. In this context, the present study evaluated the use of eosin-methylene blue (EMB) as a new photosensitizer for photodynamic control of Ae. aegypti larval populations. The photodynamic assays were performed submitting Ae. aegypti third-instar larvae to different EMB concentrations (0.0, 0.5, 1.0, 5.0, 10.0, 50.0, and 100.0 µg mL−1) in combination of three different light doses (24.3, 48.6, and 97.2 J cm−2) under either white-light r...
to 6 RESUMO. Es te trabalho teve por objetivo des envolver um pene tró grafo e letromecânico de b... more to 6 RESUMO. Es te trabalho teve por objetivo des envolver um pene tró grafo e letromecânico de bancada, co m velo cidade c ons tante de penetr ação, des tinado a realização de t estes de re sistência à penetr ação de solo com estrutura preservada. O aparelho possui um sistema mecânico de elevação, des tinado a transfor mar o mo vimento r otac ional do moto r de pass o em linear na haste, um siste ma de co ntro le do mot or, uma c élul a de car ga, um sistema aut omátic o de aquisiç ão de dados e um chassi. O si stema mecâni co teve seu torque e rotação mantidos constante por meio de um drive conectado ao mo tor. O interfaceamento fo i realizado usando o software DIAS, com saída em display de cristal líquido LCD 16x2 e botões de comando. Afim de ve r i f i c a r a e x at i dão do s d ado s o bt i do s c o m o u s o do pe n e t r ó gr af o de senvo lvi do, fo ram r eal izado s e nsaio s e m amos tr as de Lato ss olo Vermelho Distro fé rric o, e se us dados co mparados co m aque le s obtidos de um pe ne tr ógrafo padrão. O equi pame nt o de se nvol vi do apre sentou satis fatóri a pre cisão, pois não fo i obse rvada difer ença s ignifi cativa entre seus resul tados e aque les obtidos de pe netrógrafo c omerci al. O aparelho de senvolvido apre sentou rendime nto mé dio de oito amostras po r hora, superior ao equipamento co mercial. Palavras-chave: compactação, penetrometria, projeto de máquinas. RESUMEN. El objetivo de es te trabajo f ue des arr ollar un pene tró grafo ele ctr ome cánico de bancada, con velocidad constante de penetración, de sti nado a r ealizar pr uebas de re sis te nci a a l a pene tr aci ón de suelos con la estructura preservada. El aparato posee un sistema mecánico de elevación, destinado a transformar el movimiento rotacional del motor de paso en lineal del asta, un sistema de control del motor, una célula de carga, un sistema automátic o de adqui sici ón de dato s y un chasis. El tor que y r otació n de l s iste ma se mant uvi eron constante, usando un drive conectado al mo tor. La interface fue realizada usando el so ftware DIAS, con salida para un display de cristal líquido LCD 16x2 y botones de comando. Para ve r i f i c ar l a e xac t i t u d de l o s d at o s o bt e ni do s c o n e l u s o d e l pe ne t r ó gr af o des arro llado , fueron real izados ensayo s en mues tras de suelo Latosólico Rojo Distroférrico, y sus datos comparados con los obtenido s de un penetrógr afo padrón. El equipami ento desarr ollado prese ntó una satisf actori a pre cisión, pues no fue obse rvada difere ncia signif icativa entr e sus result ados y aquel los o btenidos con el pe netrógrafo c omerci al. El aparato desar rollado pr ese ntó rendimiento médio de ocho mues tras po r hora, superior al equipamiento c ome rcial. Palabras clave: compactación, penetrometria, proyecto de máquinas. AB STRACT. The objective this work was to develop an e lec tr ome chani c count er pe net ro graph, wit h a c ons tant speed pene tr ati on to t est t he resistance to penetration in soil samples with preserved structure. The apparatus has a mechanic elevation system in order to transform the step rotational engine motion of the stick into a linear one, a system to engine control, a load cell, an automatic data system and a chassis. The Re cibido 12/09/06, aprobado 12/07/07, trabajo 13/08, nota técnica. 1 Extraído da Diss ertaç ão de Mes trado do 1º autor , apr esentada à UFGD.
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Papers by Esmael Dias Prado