Results 11 to 20 of about 941 (127)

Dynamic Nucleophilic Aromatic Substitution of Tetrazines

open access: yesAngewandte Chemie, Volume 133, Issue 34, Page 18931-18939, August 16, 2021., 2021
All the advantages of dynamic covalent chemistry and the versatility of the tetrazine moiety have been combined in a novel exchange reaction: The nucleophilic aromatic substitution of tetrazines (SNTz) with phenols and alkyl thiols. Not only sophisticated structures could be easily synthesized, but more importantly, post‐functionalization by IEDDA or ...
Tanausú Santos   +6 more
wiley   +2 more sources

Evidence‐based policies: Lessons from regulatory science

open access: yesPolitics &Policy, Volume 51, Issue 4, Page 524-537, August 2023., 2023
Abstract In this article, various examples of controversies in regulatory science are analyzed concerning chemical and pharmaceutical products and functional foods. In these controversies, it is possible to show the relationship between epistemic policies and regulatory objectives (decision‐making objectives).
José Luis Luján
wiley   +1 more source

Structural and compositional dimensions of phytochemical diversity in the genus Piper reflect distinct ecological modes of action

open access: yesJournal of Ecology, Volume 110, Issue 1, Page 57-67, January 2022., 2022
Crude extract 1H NMR diversity synthesizes the compositional diversity and structural complexity of phytochemical mixtures. Plants can develop chemical diversity through different combinations of structural and compositional biosynthetic mechanisms; thus, methods incorporating both dimensions of phytochemical diversity can provide new theoretical ...
Casey S. Philbin   +4 more
wiley   +1 more source

Exposición a químicos disruptores endócrinos obesogénicos y obesidad en niños y jóvenes de origen latino o hispano en Estados Unidos y Latinoamérica: una perspectiva del curso de la vida

open access: yesObesity Reviews, Volume 22, Issue S5, Octubre 2021., 2021
Resumen En el 2019, en seguimiento a un taller dirigido por el Global Health Studies del Fogarty International Center sobre el tema de la prevención de la obesidad infantil y las sinergias de investigación que surgen a través de las colaboraciones transfronterizas, convocamos a un grupo de expertos de Estados Unidos y Latinoamérica para que realizaran ...
Wei Perng   +16 more
wiley   +1 more source

Development of Antioxidant-Loaded Nanoliposomes Employing Lecithins with Different Purity Grades

open access: yesMolecules, 2020
This work focused on comparing the ability of lecithins with two purity grades regarding their performance in the development of nanoliposomes, as well as their ability to contain and release polar (trans-aconitic acid) and non-polar (quercetin ...
Cristhian J. Yarce   +4 more
doaj   +1 more source

An Evaluation of the Physicochemical Properties of Stabilized Oil-In-Water Emulsions Using Different Cationic Surfactant Blends for Potential Use in the Cosmetic Industry

open access: yesCosmetics, 2019
One of the most complex problems in hair care formulations is the duality of the surfactants used. In this regard, such surfactants must be cationic so as to interact with the negatively charged cuticle surface of hair.
Pamela Agredo   +4 more
doaj   +1 more source

A Randomized Pilot Trial to Evaluate the Bioavailability of Natural versus Synthetic Vitamin B Complexes in Healthy Humans and Their Effects on Homocysteine, Oxidative Stress, and Antioxidant Levels

open access: yesOxidative Medicine and Cellular Longevity, Volume 2019, Issue 1, 2019., 2019
The vitamin B complex comprises 8 different water‐soluble constituents that humans must sequester from the diet. This pilot study compared natural versus synthetic vitamin B complexes for their bioavailability, accumulation, and their impact on antioxidants, homocysteine levels, and oxidative stress.
Meinrad Lindschinger   +9 more
wiley   +1 more source

Decrease of Antimicrobial Resistance through Polyelectrolyte-Coated Nanoliposomes Loaded with β-Lactam Drug

open access: yesPharmaceuticals, 2018
Currently, one of the greatest health challenges worldwide is the resistance to antibiotic drugs, which has led to the pursuit of new alternatives for the recovery of biological activity, where the use of different types of nano-systems has shown an ...
Lina M. Arévalo   +3 more
doaj   +1 more source

Productos botánicos y microbiales para el manejo de plagas: Potencial y limitaciones

open access: yesAIA Avances en Investigación Agropecuaria, 2022
Introducción. Los productos botánicos y microbiales representan una opción amigable al ambiente para el manejo de plagas, debido a los efectos adversos que ocasionan los plaguicidas químicos (Montejo-Canul et al., 2019; Nexticapan-Garcéz et al., 2021 ...
Esaú Ruiz-Sánchez
doaj   +1 more source

Flourensia cernua: Hexane Extracts a Very Active Mycobactericidal Fraction from an Inactive Leaf Decoction against Pansensitive and Panresistant Mycobacterium tuberculosis

open access: yesEvidence-Based Complementary and Alternative Medicine, Volume 2011, Issue 1, 2011., 2011
The efficacy of decoction in extracting mycobactericidal compounds from Flourensia cernua (Hojasé) leaves and fractionation with solvents having ascending polarity was compared with that of (i) ethanol extraction by still maceration, extraction with a Soxhlet device, shake‐assisted maceration, or ultrasound‐assisted maceration, followed by ...
Gloria María Molina-Salinas   +7 more
wiley   +1 more source

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