Results 21 to 30 of about 543,174 (194)

Redes sociais como ferramenta de visibilidade das mulheres nas ciências exatas: análise do perfil @lindasdaengenharia

open access: yesAnais do XV Women in Information Technology (WIT 2021), 2021
Este artigo objetiva verificar a visibilidade de mulheres que atuam nas ciências exatas, através das redes sociais, analisando o perfil \textit{@lindasdaengenharia} que divulga informações profissionais de mulheres das ciências exatas.
S. Silva   +3 more
semanticscholar   +1 more source

“MULHERES NAS CIÊNCIAS EXATAS E TECNOLOGIAS”: PERCEPÇÕES DE CONCLUINTES DO ENSINO MÉDIO DE DISTINTOS AMBIENTES SOCIOEDUCACIONAIS

open access: yesDesafios, 2021
Este estudo propôs-se a refletir acerca da presença das mulheres nas áreas de Ciências Exatas e Tecnologias, na perspectiva das narrativas de alunas concluintes do Ensino Médio, de duas escolas localizadas em distintos ambientes socioeducacionais de uma ...
Ulisses Franklin Carvalho da Cunha   +2 more
semanticscholar   +1 more source

Palladium- and copper-catalyzed highly selective mono-coupling between 2,6-diiodoanisoles and terminal alkynes in the production of alkynylated anisoles as potential precursors of benzo[b]furans [PDF]

open access: yes, 2014
The coupling reaction between 2,6-diiodoanisoles and terminal alkynes using Pd(PPh3)2Cl2 and CuI as catalysts and diisopropylamine as base in toluene at room temperature for 12 h produced selectively alkynylated 2-iodoanisoles, in good to excellent ...
Casagrande, Gleison Antonio   +4 more
core   +2 more sources

Brazilian flora extracts as source of novel antileishmanial and antifungal compounds [PDF]

open access: yes, 2008
Natural products have long been providing important drug leads for infectious diseases. Leishmaniasis is a protozoan parasitic disease found mainly in developing countries, and it has toxic therapies with few alternatives. Fungal infections have been the
Calixto, Ivete Arl   +6 more
core   +4 more sources

Simulação numérica de placas de aço em estruturas navais e offshore

open access: yesVetor, 2016
Placas são elementos estruturais de superfície plana amplamente empregados em engenharia, cuja espessura é pequena quando comparada com as demais dimensões.
Lillian Gonçalves Baptista   +1 more
doaj   +4 more sources

Evaluation of the disolution profile of drugs by multivariate electronic spectroscopy [PDF]

open access: yes, 2011
In this work the evaluation of the dissolution profile of captopril-hydrochlorothiazide and zidovudine-lamivudine associations were carried out by multivariate spectroscopic method.
Cordeiro, Gilcélia Aparecida   +4 more
core   +3 more sources

Synthesis, characterization and in vitro cytotoxicity study of Co and Ni ferrite nanoparticles prepared by sol-gel method

open access: yesSN Applied Sciences, 2021
In this study, we report the synthesis and characterization of NiFe2O4 and CoFe2O4 nanoparticles (NPs) which are widely used in the biomedical area.
Alexandre Pancotti   +8 more
doaj   +1 more source

Composição química e variação sazonal dos óleos voláteis das folhas de Michelia champaca L., Magnoliaceae [PDF]

open access: yes, 2009
The volatile oils from leaves of Michelia champaca L. collected bimonthly during one year (four times on the fifteenth day of January, March, May, July, September, and November - 2004) were subjected to GC/FID and GC-MS analysis, from which thirteen ...
Fávero, Oriana Aparecida   +2 more
core   +1 more source

EVASÃO EM CURSOS DE LICENCIATURA DE CIÊNCIAS EXATAS E NATURAIS

open access: yes, 2021
Um grupo multidisciplinar de profissionais da Universidade Federal do Triângulo Mineiro realizou estudo com o objetivo de compreender os indices de evasao dos cursos de graduacao do Instituto de Ciencias Exatas, Naturais e Educacao e de apresentar ...
Walêska Dayse Dias de Sousa   +13 more
semanticscholar   +1 more source

Isolation and purification of bromelain from waste peel of pineapple for therapeutic application [PDF]

open access: yes, 2013
The aim of this work was to isolate and purify bromelain extracted from the pineapple peel by ammonium sulfate precipitation (40-80%), followed by desalting and freeze-drying with a 75% activity recovery and 2.2 fold increased specific activity.
Bresolin, Iara Rocha Antunes Pereira   +4 more
core   +4 more sources

Home - About - Disclaimer - Privacy