Browsing GI- Quimolmat - Artigos by Title
Now showing items 1-20 of 72
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A simple solvothermal synthesis of MFe2O4 (M=Mn, Co and Ni) nanoparticles
(Elsevier, 2009-10)[Abstract] Nanoparticles of MFe2O4 (M=Mn, Co and Ni), with diameters ranging from 5 to 10 nm, have been obtained through a solvothermal method. In this synthesis, an alcohol (benzyl alcohol or hexanol) is used as both a ... -
Absolute Configuration by Vibrational Circular Dichroism of Anti-inflammatory Macrolide Briarane Diterpenoids From the Gorgonian Briareum Asbestinum
(Springer Nature, 2021-01-12)[Abstract] The four new briarane diterpenoids 2-butyryloxybriarane B-3 (2), 9-acetylbriarenolide S (3), briarenolide W (4), and 12-isobriarenolide P (5), along with briarane B-3 (1) and the five known diterpenes 6–10 were ... -
Advances in Cross-Coupling Reactions [Editorial]
(MDPI, 2020-10-01)[Abstract] Cross-coupling reactions stand among the most important reactions in chemistry. Nowadays, they are a highly valuable synthetic tool used for the preparation of a wide variety of organic compounds, from natural ... -
Amino Acid–Viologen Hybrids: Synthesis, Cucurbituril Host–Guest Chemistry, and Implementation on the Production of Peptides
(American Chemical Society, 2021-12-10)[Abstract] We present herein the development of a series of viologen–amino acid hybrids, obtained in good yields either by successive alkylations of 4,4′-bipyridine, or by Zincke reactions followed by a second alkylation ... -
Anti-Inflammatory Effects of 5α,8α-Epidioxycholest-6-en-3β-ol, a Steroidal Endoperoxide Isolated from Aplysia depilans, Based on Bioguided Fractionation and NMR Analysis
(MDPI, 2019-06-03)[Abstract:] Sea hares of "Aplysia" genus are recognized as a source of a diverse range of metabolites. 5α,8α-Endoperoxides belong to a group of oxidized sterols commonly found in marine organisms and display several ... -
Antifungal Potential of Marine Organisms of the Yucatan Peninsula (Mexico) against Medically Important Candida spp.
(MDPI, 2023-01-06)[Abstract] Invasive fungal infections represent a global health threat. They are associated with high mortality and morbidity rates, partly due to the ineffectiveness of the available antifungal agents. The rampant increase ... -
Antimicrobial Diterpene Alkaloids from an Agelas citrina Sponge Collected in the Yucatán Peninsula
(MDPI, 2022-04-28)[Abstract] Three new diterpene alkaloids, (+)-8-epiagelasine T (1), (+)-10-epiagelasine B (2), and (+)-12-hydroxyagelasidine C (3), along with three known compounds, (+)-ent-agelasine F (4), (+)-agelasine B (5), and ... -
Antiviral and Antiproliferative Potential of Marine Organisms from the Yucatan Peninsula, Mexico
(Frontiers, 2020-08-20)[Abstract] Viral infections are one of the main human health problems in recent decades and the cancer remains one of the most lethal diseases worldwide. The development of new antiviral drugs for the treatment of human ... -
Apparent colossal dielectric constants in nanoporous Metal Organic Frameworks
(American Chemical Society (ACS), 2012-05-30)[Abstract] In this work, we show that the hybrid material Co2(1,4-bdc)2(dabco)•[4DMF•1H2O], shows an apparent colossal dielectric constant at room temperature (r5000 at 300 K for =100 Hz). Nevertheless, such response ... -
Atypical Magnetic Behavior in the Incommensurate (CH3NH3)[Ni(HCOO)3] Hybrid Perovskite
(ACS, 2023-02-02)[Abstract] A plethora of temperature-induced phase transitions have been observed in (CH3NH3)[M(HCOO)3] compounds, where M is Co(II) or Ni(II). Among them, the nickel compound exhibits a combination of magnetic and nuclear ... -
Bioactivity and Metabolome Mining of Deep-Sea Sediment-Derived Microorganisms Reveal New Hybrid PKS-NRPS Macrolactone from Aspergillus versicolor PS108-62
(MDPI, 2023-01-28)[Abstract] Despite low temperatures, poor nutrient levels and high pressure, microorganisms thrive in deep-sea environments of polar regions. The adaptability to such extreme environments renders deep-sea microorganisms ... -
Biologically Active Peptides from Venoms: Applications in Antibiotic Resistance, Cancer, and Beyond [Review]
(MDPI, 2022-12-06)[Abstract] Peptides are potential therapeutic alternatives against global diseases, such as antimicrobial-resistant infections and cancer. Venoms are a rich source of bioactive peptides that have evolved over time to act ... -
Bistratamides M and N, Oxazole-Thiazole Containing Cyclic Hexapeptides Isolated from Lissoclinum bistratum Interaction of Zinc (II) with Bistratamide K
(Multidisciplinary Dixital Publishing Institute, 2017-07-01)[Abstract] Two novel oxazole-thiazole containing cyclic hexapeptides, bistratamides M (1) and N (2) have been isolated from the marine ascidian Lissoclinum bistratum (L. bistratum) collected in Raja Ampat (Papua Bar, ... -
CB[7]- and CB[8]-Based [2]-(Pseudo)rotaxanes with Triphenylphosphonium-Capped Threads: Serendipitous Discovery of a New High-Affinity Binding Motif
(American Chemical Society, 2022-05-06)[Abstract] The synthesis of new triphenylphosphonium-capped cucurbit[7]uril (CB[7])- and cucurbit[8]uril (CB[8])-based [2]rotaxanes was achieved by a simultaneous threading-capping strategy. While the use of CB[7] produced ... -
Charge ordering and dielectric properties in the near half-doped Pr0.79Na0.21MnO3 perovskite
(Elsevier, 2008-06)[Abstract] The Pr0.79Na0.21MnO3 perovskite has been prepared in polycrystalline form by a ceramic method. We have carried out its structural characterization by synchrotron X-ray powder diffraction (SXRPD) at room temperature ... -
Coexistence of magnetic and electrical order in the new perovskite-like (C3N2H5)[Mn(HCOO)3] formate
(The Royal Society of Chemistry, 2013-09)[Abstract] In this work we further the structural characterization of the recently discovered (C3N2H5)[Mn(HCOO)3] metal–organic framework with perovskite-like structure, and we present its magnetic and dielectric properties ... -
Conjugation of different immunogenic enterococcal vaccine target antigens leads to extended strain coverage
(Oxford University Press, 2019-07-09)[Abstract] Enterococci have emerged as important nosocomial pathogens due to their resistance to the most commonly used antibiotics. Alternative treatments or prevention options are aimed at polysaccharides and surface-related ... -
Connection of Isolated Stereoclusters by Combining 13C-RCSA, RDC, and J-Based Configurational Analyses and Structural Revision of a Tetraprenyltoluquinol Chromane Meroterpenoid from Sargassum muticum
(MDPI, 2022)[Abstract] The seaweed Sargassum muticum, collected on the southern coast of Galicia, yielded a tetraprenyltoluquinol chromane meroditerpene compound known as 1b, whose structure is revised. The relative configuration of ... -
Controlled Binding of Organic Guests by Stimuli-Responsive Macrocycles
(Royal Society of Chemistry, 2020-05-12)[Abstract] Synthetic supramolecular chemistry pursues not only the construction of new matter, but also control over its inherently dynamic behaviour. In this context, classic host–guest chemistry, based on the development ... -
Cytotoxic furanoditerpenes from the sponge Spongia tubulifera collected in the Mexican Caribbean
(MDPI, 2019-07-16)[Abstract] Two new spongian furanoditerpenes, 3β-hydroxyspongia-13(16),14-dien-2-one (1) and 19-dehydroxy-spongian diterpene 17 (2), along with five known terpenes, the spongian furanoditerpenes 9-nor-3-hydroxyspongia-3, ...
