Escudo de la República de Colombia

English

Food preserved with nutmeg, cloves, and black pepper resins

A blend of essential oils and resins of these species demonstrated to have antimicrobial activity and have the potential for making food packaging from renewably sourced materials.

Bogotá D. C., 20 de enero de 2017Agencia de Noticias UN-

Oleoresins may be used to produce packages to protect foods.

The carried out tests with bread to observe its antimicrobial potential. Photo: Courtesy of UNal-Palmira

Biocomposite materials are used to increase the useful life of foods.

The research project was carried out at UNal-Palmira.

Samples with nutmeg, black pepper and cloves had a better yield.

As claimed by Universidad Nacional de Colombia (UNal) in Palmira Agroindustrial Engineering master’s candidate Kelly Johanna Figueroa, who also added that oleoresins from nutmeg, cloves, and black pepper had better antimicrobial performance.

“Oleoresins are comprised of essential oils and resins, extracted volatile and non-volatile compounds from these fresh species are highly concentrated and not used much in the food industry to potentialize flavor, aroma, and color,” said Figueroa.

Oleoresins had never been assessed for inhibiting pathogen microorganisms in foods.

Therefore researchers used these organic substances with the purpose of determining the minimum concentration to prevent growth of bacteria such as Escherichia coli and Staphylococcus aureus, the most common food contaminating microorganisms.

Oleoresins inhibited the growth of microorganisms at different concentrations, beginning at 1% against Escherichia coli and 0.5% against Staphylococcus aureus with nutmeg; 0.5% for both bacteria with black pepper; and 2% against Escherichia coli and 1% against Staphylococcus aureus with cloves.

After obtaining these results the researchers added oleoresins to a biocomposite material made of jelly –microcrystalline cellulose and glycerol– with the purpose of forming a film to work as food wrapping to protect and preserve the product thanks to its antimicrobial potential.

They verified this by adding biocomposite oleoresin films to slices of white bread. They established that the antimicrobial activity against Staphylococcus aureus was maintained. They also had control slices of bread without the biocomposite films.

“After a month the bread packed without the film had mold and fungi, while the bread which had been protected with the film was visibly free from microbial attack,” said Figueroa.

They used bread because it is a common food in the daily food basket and due to its low moisture content it enables easily assessing the effect of this kind of packaging materials.

The challenge that these biocomposite materials have is improving the mechanical and barrier properties as they are inferior to conventional packaging. This is where oleoresins, besides having an antimicrobial effect can contribute to improving the physical-chemical properties of the material due to their hydrophobic character.

Research with these types of antimicrobial substances has been carried out with essential oils as they have an ample inhibition spectrum; however, they are expensive and low yielding.

“Oleoresins are much more economical, their procurement is high yielding and are easily marketed. In foods they are used at low concentrations and produce the desired features in the final products such as preserving flavor, aroma, and color besides having an antimicrobial effect, which translates into a cost-benefit for the food industry,” said Figueroa.

(Por: end/
)
N.° 931

Otras noticias

Jesús Guevara, director del cortometraje documental <i>La Perla</i>.

Artes & Culturas

abril 24 de 2017

Tumaco y fútbol, pasión documental

Un joven realizador tumaqueño explora la relación de su ciudad natal con el...

La presidenta de Chile recibió a los rectores y delegados de las principales universidades de América Latina.

Educación

abril 24 de 2017

Responsabilidad política y universidades públicas, temas de la Asamblea de la Red de Macrouniversidades

La presidenta de la República de Chile, Michelle Bachelet, junto con la...

Diecisiete personas perdieron la vida en esta tragedia.

Medioambiente

abril 24 de 2017

Erosión hídrica requiere más investigación en Manizales

La disminución de la capa vegetal en Manizales, es decir, la falta de árboles...

El riesgo de enfermedad cardiaca aumenta con la enfermedad renal crónica.

Salud

abril 24 de 2017

Enfermedad renal crónica también afecta al corazón

La enfermedad renal crónica es padecida por unas 40.000 personas en todo el...

Educación

abril 24 de 2017

Escuela de Minas de Medellín: 130 años de “Trabajo y Rectitud”

A la celebración por el cumpleaños de la sesquicentenaria Universidad Nacional...

En Colombia se estima que el 2,3 % del total de casos de cáncer registrados corresponde al oral.

Ciencia & Tecnología

abril 24 de 2017

Con proteína de calostro de las vacas diseñan péptido que ataca cáncer oral

En la primera leche que produce la vaca después de parir un ternero podría...

Un total de 26.238 aspirantes presentaron la prueba en la Sede Bogotá.

Educación

abril 23 de 2017

Multitudinaria cita con el conocimiento en la U.N.

Este no es un domingo cualquiera. Antes de las siete de la mañana, la entrada...

Educación

abril 23 de 2017

43.250 estudiantes presentaron examen de admisión a la U.N.

Con toda normalidad se llevó a cabo este domingo la jornada académica en 27...

La marcha por la ciencia partió a las 11 a.m. desde la plaza central de la U.N.

Ciencia & Tecnología

abril 22 de 2017

FOTOGALERIA: Las universidades marcharon por la ciencia

La Universidad Nacional de Colombia (U.N.) Sede Bogotá fue el punto de...

Identifican bacterias asociadas con contaminantes atmosféricos.

Ciencia & Tecnología

abril 21 de 2017

Identifican bacterias relacionadas con contaminantes atmosféricos y más en UN Periódico

Este domingo 23 de abril, la edición 209 del periódico de la Universidad...