ALFARO RODRÍGUEZ , María Del Carmen

Lemon essential oil (LEO) is associated with a multitude of health benefits due to its anticancer, antioxidant, antiviral, anti-inflammatory and bactericidal properties. Its drawback is that it is very sensitive to oxidation by heat. For this reason, researchers are increasingly investigating the use of LEO in nanoemulsions. In this work, we...

A three-step (rotor-stator-microfluidization-rotor stator) protocol was used to prepare 15% lemon essential oil in water emulgels using a mixture of Tween 80 and Span 20 surfactants as low molecular mass emulsifiers and 0.4% low-methoxyl citrus peel pectin as a gelling agent. Ca2+ was used as a gel-promoting agent. Different CaCl2/pectin mass...

El presente trabajo de investigación forma parte de un proyecto de investigación de título: "Estudios físicoquímicos de ésteres de sacarosa utilizados como emulsionantes alimentarios: Una vía de valorización de excedentes de materias primas agrícolas" .Formando parte de este proyecto se han estudiado sistemas binarios emulsionante-agua,...

En este trabajo se estudia el efecto de aplicar alta presión sobre el comportamiento reológico de disoluciones acuosas de goma diutan con el objeto de ampliar su uso potencial. Muestras de goma diutan sin tratar y tratadas fueron comparadas usando ensayos de cizalla estacionaria y ensayos de cizalla oscilatoria de baja amplitud. Esto se ha...

The rheological properties exhibited by gums make its use in applications interesting, such as foods, cosmetics, enhanced oil recovery, or constructions materials. Regardless of application field, the effect of temperature on these properties is of great importance, since these properties can be modified and cause the gum not to be useful for...

No description

ACKGROUND: Nowadays, it is of great interest to develop stable and sustainable formulations that act as nanocarriers of active ingredients. In this work, the droplet size distribution, rheology and physical stability of nanoemulsions with improved properties containing rosemary essential oil and biopolymers as a function of the concentration of...

The objective of this work is to obtain a stable and natural antimicrobial delivery system. Thus, the effect of the addition of a natural polysaccharide such as welan gum on the linear viscoelastic properties, flow behaviour, droplet size distribution and physical stability of thyme oil/W emulsions formulated with a wheat-derived surfactant was...

A three-step (rotor-stator-microfluidization-rotor stator) protocol was used to prepare 15% lemon essential oil in water emulgels using a mixture of Tween 80 and Span 20 surfactants as low molecular mass emulsifiers and 0.4% low-methoxyl citrus peel pectin as a gelling agent. Ca² + was used as a gel-promoting agent. Different CaCl₂/pectin mass...

El objetivo de este trabajo ha consistido en investigar cómo influye la presión (0 y 15000 psi) y el número de pasadas (1, 2 y 3) a través de un homogeneizador de alta presión con tecnología Microfluidizer sobre la distribución de tamaños de gota, diámetros medios y estabilidad física de una emulsión ecológica O/W. Se comparan los...

Low-acyl gellan gum fluid gels were obtained using two different gel-promoting cations under the same processing conditions, and their rheological properties were investigated. For that reason, stress and frequency sweep measurements and flow curve tests were carried out. Small amplitude oscillatory shear assays demonstrated that these...

BACKGROUND: Nanoemulsions formulated with citric essential oils are currently of interest because of their physical and chemical properties and multiple applications in areas such as the food industry or agrochemicals. These are thermodynamically unstable and have almost Newtonian flow behaviour, but a suitable formulation allows systems to be...

Background: New consumer habits are forcing the food industry to develop new and healthy products. In response to this tendency, in this investigation, we obtained nanoemulgels by microfluidization containing inulin fibre and omega-3 fatty acids. First, the influence of the number of microfluidization cycles on the physical properties of the...

In this work the microstructure and the physical stability of emulsions containing α-pinene and gellan gum were studied as a function of Atlas™ G-5000/Atlox™ 4912 copolymer mass ratio, R, used as emulsifier. In order to reach this objective, electrolytic conductivity measurements, laser diffraction, confocal laser scanning microscopy (CLSM) and...

Propiedades reológicas y estabilidad física de emulsiones ecológicas estabilizadas por un tensioactivo derivado del aceite de coco y homogeneización de alta presión. El objetivo de este trabajo fue estudiar la influencia del método de emulsificación sobre las propiedades reológicas, la distribución de tamaños de gota y la estabilidad física de...

t: Nanoemulgels are novel formulations of great interest for their use as dual-release systems and as fat substitutes in foods. Lemon essential oil, with a large number of benefits due to its antimicrobial, antifungal, and medicinal properties, and low methoxyl pectin, a natural polysaccharide capable of gelling by adding divalent ions such as...

Gellan gum is a biopolymer widely used in the food, pharmaceutical, chemical, and agrochemical fields. Its ability to form a strong gel makes it possible to produce fluid gels. These materials present an apparent yield stress, but its value could be influenced by the wall-slip effect when performing the rheological measurements by which it is...

Sustainable development involves the search for new products with a low environmental impact. Hence, the aim of this work is to obtain stable and concentrated aqueous emulsions containing bitter fennel oil and a biomass-derived emulsifier by studying different processing variables and techniques. Firstly, the effects of the application of a...

El objetivo de esta investigación fue comparar tres tensoactivos ecológicos derivados del aceite de coco para la preparación de emulsiones aceite-en-agua concentradas formuladas con α-pineno. Los tensoactivos utilizados son ésteres polietoxilados de glicerina que presentan diferente número de grupos de óxido de etileno, que son responsables...