Results 21 to 30 of about 108,024 (198)

Analysis of metabolites from plants of the Swartzia genus using chemical indexes: evolutionary tendencies

Eclética Química, 2018
The chemical indexes, suggested by Gottlieb et al., have not been used before regarding evolutionary tendency of species in the Swartzia genus. However, the importance of this work encour- aged for an analysis of the Swartzia genus using the metabolites ...
Aderbal F. Magalhães, Ana Maria Goulart de Azevedo Tozzi, Celira Caparica Santos, Eva G. Magalhães   +3 more
doaj   +1 more source

HPLC Quantification of Cytotoxic Compounds from Aspergillus niger

Journal of Chemistry, 2017
A high-performance liquid chromatography method was developed and validated for the quantification of the cytotoxic compounds produced by a marine strain of Aspergillus niger.
Paula Karina S. Uchoa, Leandro Bezerra de Lima, Antonia T. A. Pimenta, Maria da Conceição F. de Oliveira, Jair Mafezoli, Mary Anne S. Lima   +5 more
doaj   +1 more source

Synthetic model of a new deoxybenzoin derivative from Deguelia hatschbachii A.M.G. Azevedo

Eclética Química, 2018
In this paper we describe the synthesis of 2 ́,4 ́-dimethoxy-8-(propyl-2-one)-deoxybenzoin, a new compound employed as a model for the comparison with the respective spectral data for 6’,4- dihydroxy-3’-(3,3- dimethylallyl)-2",2"-dimethylchromene(5",6":5’
A. F. Magalhães, E. G. Magalhães, G. Trazzi, V. R. de S. Moraes   +3 more
doaj   +1 more source

Selenonium Salt as a Catalyst for Nucleophilic Substitution Reactions in Water: Synthesis of Thiocyanites and Selenocyanates

Molecules, 2023
Organothiocyanates and selenocyanates are valuable compounds, both in terms of functional group interconversion and due to their biological activities. In this contribution, we report the synthesis of a series of these important substances in a mixture ...
Alix Y. Bastidas Ángel, Philipe Raphael O. Campos, Eduardo E. Alberto   +2 more
doaj   +1 more source

Consecutive hydrazino-Ugi-azide reactions: synthesis of acylhydrazines bearing 1,5-disubstituted tetrazoles

Beilstein Journal of Organic Chemistry, 2017
Isocyanide-based multicomponent reactions (IMCRs) allow the construction of relatively complex molecules through a one-pot synthesis. The combination of IMCRs in a consecutive or sequential fashion further extends the complexity of the molecules obtained.
Angélica de Fátima S. Barreto, Veronica Alves dos Santos, Carlos Kleber Z. Andrade   +2 more
doaj   +1 more source

Benzylamines as highly potent inhibitors of the sterol biosynthesis pathway in Leishmania amazonensis leading to oxidative stress and ultrastructural alterations

Scientific Reports, 2022
Leishmaniasis is a neglected disease caused by protozoan parasites of the Leishmania genus. Benzylamines are a class of compounds selectively designed to inhibit the squalene synthase (SQS) that catalyzes the first committed reaction on the sterol ...
Sara Teixeira de Macedo-Silva, Gonzalo Visbal, Gabrielle Frizzo Souza, Mayara Roncaglia dos Santos, Simon B. Cämmerer, Wanderley de Souza, Juliany Cola Fernandes Rodrigues   +6 more
doaj   +1 more source

Carbohydrate-based 1,3-oxazoline-2-thiones as original bioactive structures:synthesis and reactivity [PDF]

, 2008
Tese de doutoramento, Química (Química Orgânica), 2009, Universidade de Lisboa, Faculdade de CiênciasDisponível no ...
Silva, Sandrina Isabel Ribeiro Martins da, 1980-
core  

Caracterização química e espectroscópica de solos irrigados com efluente de esgoto tratado [PDF]

, 2009
A utilização de efluentes de esgoto tratado na irrigação, ao invés de realizar a disposição deste subproduto nos cursos d'água tem sido uma alternativa antiga, popular e atrativa, com triplo propósito: tratamento complementar do efluente, fonte de água e
MARTIN-NETO, Ladislau, MELFI, Adolpho Jose, MILORI, Débora Marcondes Bastos Pereira, MONTES, Célia Regina, SANTOS, Larissa Macedo dos, SILVA, Wilson Tadeu Lopes da, SIMÕES, Marcelo Luiz   +6 more
core   +2 more sources

Stepwise On‐Surface Synthesis and Transformations of Two‐Dimensional Covalent Organic Frameworks by Controlled Thermal Stimuli

Advanced Materials, EarlyView.
The seminal transformation of a 2D‐COF (SURFCOF‐IMDEA1) into a 2D porous COF (SURFCOF‐IMDEA2) on Au(111) by a sequential C‐C coupling and ladderization triggered by thermal annealing steps at increasing temperatures is reported. Abstract The development of covalent organic frameworks (COFs) is currently a primary objective in materials science, taking ...
Ana Barragán, Elena Pérez‐Elvira, Diego J. Vicent, Marco Lozano, Diego Soler‐Polo, Koen Lauwaet, José M. Gallego, Rodolfo Miranda, José I. Urgel, Pavel Jelínek, Nazario Martín, David Écija   +11 more
wiley   +1 more source

Rational Design and Multicomponent Synthesis of Lipid–Peptoid Nanocomposites towards a Customized Drug Delivery System Assembly

Molecules, 2023
Nanotechnology has assumed a significant role over the last decade in the development of various technologies applied to health sciences. This becomes even more evident with its application in controlled drug delivery systems.
Thaissa Pasquali F. Rosalba, Guilherme D. R. Matos, Carlos Eduardo M. Salvador, Carlos Kleber Z. Andrade   +3 more
doaj   +1 more source