Results 11 to 20 of about 13,538 (172)
Nueva política europea en productos químicos. REACH [PDF]
Revista de Salud Ambiental, 2005 En febrero de 2001, la Comisión Europea publicó el Libro Blanco relativo a la estrategia para la futura política en materia de sustancias y preparados químicos, que se fundamenta en una revisión del sistema comunitario actual de regulación de las ...
Raquel Fernández Sánchez +3 more
doaj +4 more sources
Cosmetics, 2020 The aim of this work was to review the reported information about the phospholipid composition of lecithins derived from several natural sources (lipids of plant, animal, and marine origin) and describe their main applications for the cosmetic, food, and
Maria J. Alhajj +3 more
doaj +1 more source
Cosmetics, 2020 In the pre-formulation stages of cosmetic products, in vitro permeability tests correspond to an important alternative for making better decisions regarding the stability, performance and biocompatibility of these products. Moreover, these tests allow us
Estefania Benavides +3 more
doaj +1 more source
Mundo Nano, 2020 Los resultados de microscopia electrónica de transmisión de alta resolución pueden ser cuantitativamente interpretados si se realizan los ajustes necesarios de la óptica-electrónica del instrumento para la adquisición de las imágenes de resolución ...
Carlos Angeles Chávez
doaj +1 more source
Plan de negocios y análisis financiero para una empresa de comercialización de productos químicos en el Ecuador. Caso: Clorosa Cía. Ltda. [PDF]
, 2004 A lo largo del presente trabajo pretenderemos ofrecer una visión clara y real de la situación del mercado de productos químicos ecuatoriano, sus empresas competidoras, clientes, tendencias de crecimiento, alternativas tecnológicas, etc.; para ...
Díaz Avalos, Pablo Raúl +1 more
core +2 more sources
Envenomation caused by the bite of the snake Bothriechis schlegelii. Report of two cases in Colombia
Case Reports, 2017 The bite by snakes of the Bothriechis genus is common in certain areas of Colombia such as the Coffee-growing Region. Due to their arboreal habits and defensiveness, these snakes usually bite farmers in their upper limbs and face.
Mario Galofre Ruiz
doaj +1 more source
Development of Antioxidant-Loaded Nanoliposomes Employing Lecithins with Different Purity Grades
Molecules, 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
Cosmetics, 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
Oxidative 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
Pharmaceuticals, 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