Results 1 to 10 of about 12,677 (60)

Resource Management Practices Towards Sustainable Support System During Pandemic

open access: yesInternational Journal of Educational Management and Development Studies, 2022
The Philippines is grappling to effectively finance school education resulting in serious consequences for the provision of quality education amidst the backdrop of the pandemic.
Josephine V. Acido   +1 more
doaj   +1 more source

Cinética para recuperación de zinc de cenizas de galvanizado con ácido clorhídrico

open access: yesFIGEMPA, 2016
La extracción del zinc que contienen las cenizas de galvanizado en caliente se realizó usando ácido clorhídrico. La composición de las cenizas fue determinada por difracción de rayos x, obteniéndose zinc metálico, oxido y el hidróxido, siendo el mayor ...
Mario Calle   +2 more
doaj   +1 more source

La ecuación de Charlot, la gráfica de Flood y la gráfica de Gordus

open access: yesEducación Química, 2018
Se presenta el tratamiento riguroso del estado de equilibrio de una disolución de un ácido (o una base) monoprótico para justificar las simplificaciones que permiten la enseñanza en el aula utilizando una hoja de cálculo.
María Teresa Ramírez-Silva   +4 more
doaj   +1 more source

Determinación de las propiedades fisicoquímicas y perfil de ácidos grasos del aceite de la semilla obtenida del procesamiento de zumo de maracuyá (Passiflora edulis)

open access: yesINGnosis Revista de Investigación Científica, 2019
En general la industrialización de frutas, como toda industria de alimentos implica la generación de una cantidad considerable de residuos que pueden ser aprovechados de diversas formas, como en alimentación animal, abonos, obtención de biogás, en la extracción de aceites, pectinas, flavonoides, entre otros.
Jorge Enrique Hoyos Zagaceta   +2 more
openaire   +1 more source

Lixiviación ácida de concentrados de scheelita

open access: yesRevista de Metalurgia, 2005
Se estudió la lixiviación acida, en medio clorhídrico, de un concentrado de wolframio (scheelita, CaWO4). De lo anterior, se obtuvo un sólido insoluble (H2WO4), que se trató con una solución alcalina de hidróxido de sodio, lográndose la completa ...
P. Navarro, C. Vargas, F. J. Alguacil
doaj   +1 more source

EFEITO DO ARMAZENAMENTO E DE FITOHORMÔNIOS NA QUALIDADE FISIOLÓGICA DE SEMENTES DE ARATICUM (Annona crassiflora Mart.) EFFECT OF STORAGE AND PLANT HORMONES IN GERMINATION OF ARATICUM SEEDS (Annona crassiflora Mart.)

open access: yesPesquisa Agropecuária Tropical, 2007
<!-- @page { margin: 2cm } --> <p class="western" align="justify">As sementes de araticum (Annona crassiflora Mart.) apresentam germinação lenta e desuniforme, o que afeta negativamente a sua propagação.
Marcos Antônio Machado Mesquita   +5 more
doaj   +1 more source

EXTRACTO DEL MAÍZ MORADO COMO INDICADOR QUÍMICO

open access: yesChakiñan, 2019
La presente investigación propone la extracción de las antocianinas presentes en el maíz morado y su utilización en la identificación cualitativa del carácter ácido, neutro y/o básico de variadas sustancias de la vida cotidiana.
Elena Patricia Urquizo Cruz   +1 more
doaj   +1 more source

Aplicación de nueva tecnología ácida no corrosiva biodegradable para limpieza de pozos petroleros de la cuenca oriente ecuatoriana

open access: yesFIGEMPA, 2019
En el presente artículo se demuestra la eficacia en la aplicación de nueva tecnología acida no corrosiva biodegradable para la limpieza de pozos petroleros.
Raúl Rodolfo Cisneros   +1 more
doaj   +1 more source

Determinação de ácido benzóico e ácido sórbico em iogurtes comerciais [PDF]

open access: yesActa Amazonica, 1990
Quinze amostras de iogurtes comerciais foram analisadas quanto ao teor de ácido benzóico e sórbico, por meio de cromatografia líquida de alta performance de acordo com Ito et al. (1983).
Caio Cesar Torres   +1 more
doaj   +1 more source

Estudo comparativo entre a atividade terapêutica da imida ftálica do acido glutâmico e a atividade terapêutica da triancinolona no tratamento da reação hansênica da hanseniase virchowiana

open access: yesHansenologia Internationalis, 1981
Autor estuda comparativamente a atividade de Imida ftálica do ácido glutâmico e da Triancinolona no tratamento da reação hansênica da hanseníase virchowiana (síndromes do eritema nodoso ou polimorfo), em vinte pacientes internados no Hospital das ...
Estevam de Almeida Neto
doaj   +1 more source

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