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    Facile and Promising Method for Michael Addition of Indole and Pyrrole to Electron-Deficient trans-β-Nitroolefins Catalyzed by a Hydrogen Bond Donor Catalyst Feist’s Acid and Preliminary Study of Antimicrobial Activity by Abdullah M. A. Al Majid, Mohammad Shahidul Islam, Assem Barakat, Mohamed H. M. Al-Agamy, Mu. Naushad

    Published 2014-01-01
    “…The importance of cooperative hydrogen-bonding effects has been demonstrated using novel 3-methylenecyclopropane-1,2-dicarboxylic acid (Feist’s acid (FA)) as hydrogen bond donor catalysts for the addition of indole and pyrrole to trans-β-nitrostyrene derivatives. Because of the hydrogen bond donor (HBD) ability, Feist’s acid (FA) has been introduced as a new class of hydrogen bond donor catalysts for the activation of nitroolefin towards nucleophilic substitution reaction. …”
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    Una colaboración entre Rubens y Snyders a propósito de la representación pictórica de ofidios. Tres obras con serpientes, de Snyders, en museos de Madrid. by Saúl Yubero-Hierro

    Published 2025-02-01
    “… La colaboración entre Rubens y Snyders fue muy fructífera, aunque, en ocasiones, surgen dudas de las manos que colaboran con el autor de La cabeza de Medusa, pues Rubens retocaba obras propias y ajenas. Se exponen tres lienzos con serpientes retratadas por Snyders en museos madrileños, cuyo objetivo es contribuir a favor de la hipótesis de la colaboración en dicha obra. …”
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    Copie ou éloge ? Les porcelaines monochromes en rouge de cuivre d’époque Kangxi (1661-1722) imitant les porcelaines du règne de Xuande (1425-1435) by Valentina Bruccoleri

    Published 2019-06-01
    “…These pieces, which were produced from the 14th century onward, reached their highest level of quality under the reign of Ming emperor Xuande (1425-1435), then declined progressively, in quality and quantity, until their total disappearance at the end of the 15th century. …”
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