Results 11 to 20 of about 12,420 (195)

The Rubens tube [PDF]

open access: yesProceedings of Meetings on Acoustics, 2009
In 1905, Heinrich Rubens and Otto Krigar-Menzel published a paper describing a unique acoustics teaching apparatus. They developed a flammable gas-filled tube with holes in the top that revealed the acoustic standing wave behavior inside the pipe via the height of flames above the pipe.
openaire   +1 more source

Antitumor immunity and therapeutic properties of marine seaweeds-derived extracts in the treatment of cancer

open access: yesCancer Cell International, 2022
Marine seaweeds are important sources of drugs with several pharmacological characteristics. The present study aims to evaluate the antitumor and antitumor immunological potentials of the extracts from the brown alga Padina pavonica and the red alga ...
Mostafa M. El-Sheekh   +4 more
doaj   +1 more source

Estudio de dos retratos: “Un fraile franciscano”, de Rubens y el “Papa Inocencio X”, de Velázquez

open access: yesIsidorianum, 2017
Hoy en día no se sabe quién es la persona retratada por el pintor P.P. Rubens en el “Retrato de un Fraile Franciscano”. A través de este estudio planteo la hipótesis de que la persona retratada por P.P. Rubens en el “Retrato de un Fraile Franciscano”, c.
Francisco Javier Cimorra Pena
doaj   +1 more source

Gestão escolar, saúde mental e ensino remoto: pesquisa com professores da rede pública na cidade de São Paulo

open access: yesProcessando o Saber, 2022
Com o início da pandemia, a gestão escolar descobriu um novo problema a ser enfrentado: a readequação do sistema de ensino para que os estudantes não fossem prejudicados com o distanciamento social, adotando-se então o Ensino Remoto.
Eduarda Kai, Vanina Sigrist
doaj  

La investigación en el Área de Pintura Flamenca y Escuelas del Norte del Museo del Prado

open access: yesArbor: Ciencia, Pensamiento y Cultura, 2006
El Museo Nacional del Prado posee una de las colecciones de pintura flamenca de los siglos XV, XVI y XVII de mayor calidad y tamaño que existen, y también es depositario de obras de arte de gran importancia de origen alemán (entre ellas varios cuadros de
Alejandro Vergara Sharp
doaj   +1 more source

Physico-chemodiversity variation between the most common calcareous red seaweed, Eastern Harbor, Alexandria, Egypt

open access: yesHeliyon, 2022
The present study sought to detect the difference in physicochemical properties and the proximate compositions of common calcareous red seaweeds ''Corallina officinalis, Jania rubens, and Amphiroa rigida''. J.
Abeer A.M. El-Sayed, Mona M. Ismail
doaj   +1 more source

Isolation and Molecular Characterization of Indigenous Penicillium chrysogenum/rubens Strain Portfolio for Penicillin V Production

open access: yesMicroorganisms, 2023
Beta (β)-lactam antibiotic is an industrially important molecule produced by Penicillium chrysogenum/rubens. Penicillin is a building block for 6-aminopenicillanic acid (6-APA), an important active pharmaceutical intermediate (API) used for semi ...
Amol M. Sawant   +2 more
doaj   +1 more source

Pedro Acuña y Malvar y su legado: la colección de tapices de la catedral de Santiago

open access: yesAd Limina, 2018
El 22 de noviembre de 1814 fallecía en Madrid, donde había desarrollado su carrera política con distintos cargos en las cortes de Carlos III y Carlos IV, el canónigo compostelano Pedro Acuña y Malvar.
Ramón Yzquierdo Peiró
doaj   +1 more source

EXPANSÃO E INTERIORIZAÇÃO DAS UNIVERSIDADES FEDERAIS NO BRASIL: FILIAÇÕES SÓCIO-HISTÓRICAS DO DISCURSO DO REUNI

open access: yesHolos, 2021
O artigo analisa as filiações sócio-históricas do discurso de otimização dos recursos físicos e humanos das universidades federais proposto pelo Programa de Apoio a Planos de Reestruturação e Expansão das Universidades Federais (Reuni).
Lavoisier Almeida Dos Santos, Valci Melo
doaj   +1 more source

Screening of Bioactive Compounds from Endophytic Marine-Derived Fungi in Saudi Arabia: Antimicrobial and Anticancer Potential

open access: yesLife, 2022
Nowadays, endophytic fungi represent a rich source of biological active compounds. In the current study, twelve endophytic fungal species were isolated from Avicennia marina leaves.
Aisha M. H. Al-Rajhi   +6 more
doaj   +1 more source

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