Elizabeth Alvarado-Gomez
Instituto Potosino de Investigación Científica y Tecnológica
PoloxamerHydrophobeRenewable resourceFerrofluidMicroorganismChemistryMaterials scienceIn vitroScanning electron microscopeMelamineGram-negative bacteriaSilver sulfadiazineBiocompatibilityPseudomonas aeruginosaSpongeLayer (electronics)Staphylococcus aureusStearic acidGram-positive bacteriaChitosanSeparation processMotor oilCoatingAbsorption capacitySurface coatingSilver nanoparticleImmersion (virtual reality)Chemical engineeringAntimicrobialFiberBacteriaBiofilmContact anglePorosityAdhesionMagnetic nanoparticlesMicrobiology
6Publications
4H-index
89Citations
Publications 6
Newest
#1Elizabeth Alvarado-Gomez (Instituto Potosino de Investigación Científica y Tecnológica)H-Index: 4
#2Jesús I. TapiaH-Index: 1
Last. Armando EncinasH-Index: 21
view all 3 authors...
Abstract A sponge was designed for separating oils from water, which is based on the natural luffa sponge functionalized with stearic acid (L-SA), both natural and abundant renewable resources. Several sponges were prepared using a simple, inexpensive and easily scalable immersion method. The L-SA sponges showed an absorption capacity of 15 ± 2, 14 ± 2 and 12 ± 3 g g−1 with vegetable, used motor and motor oils respectively, after an immersion time of 240 s. The final concentration of oil remaini...
3 CitationsSource
#1Kevin Hintze (Instituto Potosino de Investigación Científica y Tecnológica)
#2Jesús I. Tapia (Instituto Potosino de Investigación Científica y Tecnológica)H-Index: 1
Last. Armando Encinas (Instituto Potosino de Investigación Científica y Tecnológica)H-Index: 21
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Abstract Herein henequen fibers have been functionalized by coating with a mixture containing stearic acid and ferrofluid. The surface coating was done using a one step immersion method giving as a result fibers with a surface layer having a magnetic response. Scanning electron microscopy shows that henequen has a regular porous structure, which makes it compatible with ferrofluid and allows setting a layer of magnetic nanoparticles and stearic acid on the surface of the fiber. The X-ray and inf...
Source
#1Jesús I. Tapia (Instituto Potosino de Investigación Científica y Tecnológica)H-Index: 1
#2Elizabeth Alvarado-Gomez (Instituto Potosino de Investigación Científica y Tecnológica)H-Index: 4
Last. Armando Encinas (Instituto Potosino de Investigación Científica y Tecnológica)H-Index: 21
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Abstract In this work, melamine sponges were functionalized, to obtain hydrophobic and magnetic materials capable to absorb oil and hydrocarbons, by the addition of stearic acid (SA) and ferrofluid (FF) in a simple way. Physicochemical and structural properties of melamine sponges with stearic (M-SA) and stearic acid with ferrofluid (M-SA+FF) were evaluated. Scanning electron microscopy shows that the sponges have porous structure, which make them highly absorbent. Water contact angles (WCA), de...
18 CitationsSource
#1Elizabeth Alvarado-Gomez (Universidad Autónoma de San Luis Potosí)H-Index: 4
#2Gabriel Alejandro Martínez-Castañón (Universidad Autónoma de San Luis Potosí)H-Index: 19
Last. Fidel Martinez-Gutierrez (Universidad Autónoma de San Luis Potosí)H-Index: 13
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Abstract The skin wounds cause serious burden to healthcare systems. The lack of sterility of the innate barrier function of the skin facilitates the development of microbial communities within the wound environment especially in biofilm form. Since biofilm is difficult to eradicate, new treatments have been established, such as silver nanoparticles (AgNPs), which antimicrobial and anti-biofilm properties have been studied, nevertheless, their toxic effects are known too. Different concentration...
17 CitationsSource
#1Elizabeth Alvarado-Gomez (Universidad Autónoma de San Luis Potosí)H-Index: 4
#2Mario Alberto Pérez-Díaz (Universidad Autónoma de San Luis Potosí)H-Index: 5
Last. Fidel Martinez-Gutierrez (Universidad Autónoma de San Luis Potosí)H-Index: 13
view all 7 authors...
Abstract A biofilm is a very complex consortium formed by a mix of different microorganisms, which have become an important health problem, because its formation is a resistance mechanism used by bacteria against antibiotics or the immune system. In this work, we show differences between some physicochemical properties of biofilms in mono- and multi-species, formed by bacteria from clinical samples of infected chronic wounds. Of the most prevalent bacteria in wounds, two mono- and one multi-spec...
8 CitationsSource
#1Mario Alberto Pérez-Díaz (Universidad Autónoma de San Luis Potosí)H-Index: 5
#2Elizabeth Alvarado-Gomez (Universidad Autónoma de San Luis Potosí)H-Index: 4
Last. Fidel Martinez-Gutierrez (Universidad Autónoma de San Luis Potosí)H-Index: 13
view all 10 authors...
The development of multi-species biofilms in chronic wounds is a serious health problem that primarily generates strong resistance mechanisms to antimicrobial therapy. The use of silver nanoparticles (AgNPs) as a broad-spectrum antimicrobial agent has been studied previously. However, their cytotoxic effects limit its use within the medical area. The purpose of this study was to evaluate the anti-biofilm capacity of chitosan gel formulations loaded with AgNPs, using silver sulfadiazine (SSD) as ...
58 CitationsSource