Steroidal Alkaloids
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Ecofriendly Synthesis of Silver Nanoparticles Using Potato Steroidal Alkaloids and Their Activity Against Phytopathogenic Fungi
ABSTRACT In order to reduce the excessive reliance on the toxic chemical fungicides, the present study aimed to isolate the total potato glycoalkaloids (TPAs), and the two steroidal alkaloids α-chaconine and α-solanine from potatoes, Solanum tuberosum L. Their structures were characterized using physical and spectroscopic methods including (UV, IR, 1H, 13C
Braz. arch. biol. technol.. Publicado em: 14/11/2018
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2. Protective effects of steroidal alkaloids isolated from Solanum paniculatum L. against mitomycin cytotoxic and genotoxic actions
Solanum paniculatum L., é uma planta com ocorrência em toda a América tropical, especialmente no Cerrado. No Brasil, é utilizada para fins culinários e, na medicina popular, para o tratamento de distúrbios gástricos e hepáticos, além de ressacas. Estudos com extratos de S. paniculatum demonstraram ausência de genotoxicidade em testes com camundong
An. Acad. Bras. Ciênc.. Publicado em: 2013-06
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3. Solanum campaniforme: chemical constituents, fragmentation study and dereplication by electrospray mass spectrometry (ESI-MS/MS) / Solanum campaniforme: constituintes quÃmicos, estudo de fragmentaÃÃo e desreplicaÃÃo por espectrometria de massas com ionizaÃÃo por electrospray (IES-EM/EM)
Este trabalho descreve o estudo fitoquÃmico de Solanum campaniforme (Solanaceae), visando o isolamento e elucidaÃÃo estrutural de novos constituintes quÃmicos bioativos, bem como o estudo do padrÃo de fragmentaÃÃo por espectrometria de massas seqÃencial com ionizaÃÃo por electrospray (IES-EM/EM) dos alcalÃides obtidos. A investigaÃÃo quÃmica re
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/11/2011
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4. InibiÃÃo dos efeitos locais do veneno de Bothrops pauloensis por alcalÃides esteroidais de Solanum campaniforme Roem. &Schult. (Solanaceae). / Inhibition of the local effects of Bothrops pauloensis by steroidal alkaloids from Solanum campaniforme Roem. &Schult. (Solanaceae).
Envenenamentos por serpentes sÃo um importante problema de saÃde muito difundido em paÃses tropicais. Entre as espÃcies mais perigosas da AmÃrica do Sul encontra-se o gÃnero Bothrops. Acidentes ofÃdicos causados por espÃcies Bothrops podem desenvolver rapidamente dano tecidual local grave, incluindo edema, hemorragia, mionecrose, ulceraÃÃo de pele
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/07/2011
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5. Phytochemical and physiological changes in Ashwagandha (Withania somnifera Dunal) under soil moisture stress
Ashwagandha, commonly known as the Indian Ginseng (Withania somnifera) is an ingredient in many herbal preparations used for healing various ailments. It is cultivated in semi-arid regions of India as rain-fed crop. The response of this crop (cv. JA-134) to progressive soil moisture deficit on growth, physiology and content of phytochemicals was studied. At
Brazilian Journal of Plant Physiology. Publicado em: 2010
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6. Estudo fitoquimico e efeitos analgesicos da Porophyllum ruderale
According to traditional medicine several properties like cicatrizant, antiseptic, antiinflamatory, antispasmodic, analgesic are attributed to the plant Porophyllum ruderale, besides others. Aiming to confirm scienbifically some of this activities, we carried out the present work with the following objectives: to verify qualitativelly the active principIes o
Publicado em: 1997
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7. Melyrid beetles (Choresine): A putative source for the batrachotoxin alkaloids found in poison-dart frogs and toxic passerine birds
Batrachotoxins are neurotoxic steroidal alkaloids first isolated from a Colombian poison-dart frog and later found in certain passerine birds of New Guinea. Neither vertebrate group is thought to produce the toxins de novo, but instead they likely sequester them from dietary sources. Here we describe the presence of high levels of batrachotoxins in a little-
National Academy of Sciences.
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8. Squalamine: an aminosterol antibiotic from the shark.
In recent years, a variety of low molecular weight antibiotics have been isolated from diverse animal species. These agents, which include peptides, lipids, and alkaloids, exhibit antibiotic activity against environmental microbes and are thought to play a role in innate immunity. We report here the discovery of a broad-spectrum steroidal antibiotic isolated
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9. The structure of zetekitoxin AB, a saxitoxin analog from the Panamanian golden frog Atelopus zeteki: A potent sodium-channel blocker
Bufonid anurans of the genus Atelopus contain both steroidal bufadienolides and various guanidinium alkaloids of the tetrodotoxin class. The former inhibit sodium-potassium ATPases, whereas the latter block voltage-dependent sodium channels. The structure of one guanidinium alkaloid, zetekitoxin AB, has remained a mystery for over 30 years. The structure of
National Academy of Sciences.