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Mostrando ítems 1061-1070 de 2220
Caracterização macro e microscópia da língua e esôfago de tartarugas marinhas (testudines)
(Universidade Federal do Rio Grande do NorteBrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM BIOLOGIA ESTRUTURAL E FUNCIONAL, 2020-11-06)
There is only a little information about macro and microscopic morphology of the
gastrointestinal tract of sea turtles, considering that all species are classified under
some level of threat of extinction. In this context, ...
Efeito da adição de ureia nas propriedades de adesivos fenólicos produzidos com óleo pirolitico de Eucalyptus sp.
(BrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM CIÊNCIAS FLORESTAIS, 2017-02-16)
The present work aimed to evaluate the effect of the addition of urea on properties of phenolic adhesives produced with oil from pyrolysis of Eucalyptus sp. Adhesives formulations were synthesized involving two ...
Extração, caracterização e aplicação do corante de urucum (Bixa orellana L.) no tingimento de fibras naturais
(Universidade Federal do Rio Grande do NorteBRUFRNPrograma de Pós-Graduação em Engenharia QuímicaPesquisa e Desenvolvimento de Tecnologias Regionais, 2003-04-10)
The increasing demand for natural dyes in place of synthetic ones is justified by the non-toxicity or low toxicity of the former. The synthetic dyes are associated with diseases like cancer as well as when released in the ...
Síntese de microcápsulas de Poli(ureiaformaldeído)(PUF)/Diciclopentadieno (DCPD): Influência do tipo de agitação e sua incorporação em matriz epóxi
(Universidade Federal do Rio Grande do NorteBrasilUFRNEngenharia de Materiais, 2019-06-11)
The use of microcapsules has been studied to promote the self-healing functionality in polymers and polymer matrix composites. Variation in the synthesis parameters, such as speed and type of agitation, can alter the ...
Avaliação morfológica de corpo caloso e córtex cerebral em delfinídeos
(Universidade Federal do Rio Grande do NorteBrasilUFRNCiências Biológicas, 2017-12-01)
Cetaceans are represented by dolphins (Odontoceti) and whales (Mysticeti) and are
characterized as mammals with life totally adapted to the aquatic environment.
Odontocetos have significant encephalization, showing a ...
Golgi method without osmium tetroxide for the study of the central nervous system
(1992)
A variant Golgi technique was developed that consisted of substituting osmium tetroxide with formaldehyde as the initial fixative in intracardiac perfusion, along with the addition of glacial acetic acid to the chromating ...
Chemical reactions in H2O:CO interstellar ice analogs promoted by energetic heavy ion irradiation
(2022)
H2O:CO, at concentrations of (3:2) and (10:1), was condensed on CsI substrate at 15 K and irradiated with 46 MeV 58Ni11 + ion beam. Radiolysis induced by fast heavy ions was analyzed by infrared spectroscopy (FTIR). The ...
Síntesis de Glicerolformal asistida de energía por microondas
(Quito: UCE, 2013-07)
La presente investigación tiene como objetivo proponer el uso de una nueva fuente de energía para la obtención de productos a través de reacciones de síntesis orgánica. El propósito de la presente investigación fue ...
Simulación del proceso de separación de acroleína presente en una mezcla multicomponente vía Aspen Plus
(Universidad Autónoma Metropolitana (México). Unidad Azcapotzalco. División de Ciencias Básicas e Ingeniería., 2018)
Actualmente, en la industria química se presentan diferentes problemas de separación de mezclas multicomponentes, los métodos comúnmente empleados son destilación, absorción, extracción líquido-líquido, etc. El presente ...
Eliminación de compuestos orgánicos volátiles en atmósferas cerradas mediante el uso de un material híbrido, zeolita-mof
(Universidad Autónoma Metropolitana (México). Unidad Azcapotzalco. Coordinación de Servicios de Información., 2019)
Ante los problemas de salud generados en el ser humano por la contaminación del aire en espacios cerrados, debida en gran parte por la presencia de compuestos orgánicos volátiles (COV’s) los cuales son generados por las ...