Featured Research

from universities, journals, and other organizations

New technology detects probiotic organisms in food

Date:
July 23, 2014
Source:
Investigación y Desarrollo
Summary:
In the food industry, it is very important to ensure the quality and safety of products to improve their properties and reduce foodborne illness. Toward this end, a team of researchers developed a sensing microbiosensor that detects beneficial bacteria. This micromechanical device is inexpensive, fast, selective and reliable, and has been used to evaluate the growth of L. plantarum 299vm,  a probiotic microorganism useful in the development of fermented dairy products.

The biosensor is able to monitor the growth of about 400 cells in just 30 minutes, compared with the traditional method that requires at least 24 hours of incubation.
Credit: Image courtesy of Investigación y Desarrollo

In the food industry is very important to ensure the quality and safety of products consumed by the population to improve their properties and reduce foodborne illness. Therefore, a team of Mexican researchers developed a sensing microbiosensor that detects beneficial bacteria. This micromechanical device, which is known for being inexpensive, fast, selective and reliable, is the first of its kind manufactured in the country, and has been used to evaluate the growth of L. plantarum 299vm, a probiotic microorganism useful in the development of fermented dairy products.

Related Articles


The biosensor is able to monitor the growth of about 400 cells in just 30 minutes, compared with the traditional method that requires at least 24 hours of incubation.

This technology, which has potential application in the food industry and the health sector, was developed by specialists of the National Polytechnic Institute (IPN) in collaboration with the Mexican Oil Institute (IMP) and the development of the research project obtained the National Award for Food Science and Technology 2013 (PNCTA) in the Professional Category of Food Technology, which has been organized for the last 38 years by the National Council for Science and Technology (CONACYT) and the Mexican Industry Coca-Cola.

Jorge Perez Chanona, researcher at the National School of Biological Sciences (ENCB) at IPN, indicates that these devices have high sensitivity and will soon be portable and inexpensive.

"We have built the microbiosensor as a pilot to evaluate its potential in biosensing bacteria; the device is based on the resonance advantage of a lever or beam (holder chip) of micron size, to evaluate small changes in mass of the order of nanograms (which is the approximate weight of a bacterium)."

Chanona Pérez explains that the microbiosensor was built with a holder chip supporting a fabricated silicon beam of 125 microns long by 50 wide and 4 of thickness.

The holder chip is chemically and biologically modified and microcapillaries were used to coat the substrate with a specific growth of lactic acid bacteria, then inoculated with the "problem" sample, and the beam was vibrated at a specific resonance frequency matching the atomic scanner microscope, which allows monitoring the damping experienced by the holder chip due to small mass changes that occur when microorganisms grow on its surface, similar to the behavior of a trampoline when you add more weight, thus detecting possible bacterial growth dynamics within minutes of inoculation.

The IPN specialist details that besides these beneficial bacteria, micro and nano-biosensors can detect other microorganisms as pathogens; fungi; yeast; infectious agents (viruses); toxins; pollution particles and biomolecules, from different sources, such as water, air, soil or food.

The percentage of biosensors based on micro and nanotechnology for marketed food is still minimal, the country is just beginning to work in biological or medical applications, making it a field of opportunities for the development of basic science and technological innovation.

The construction of the microbiosensor was conceived four years ago and was the result of the thesis work of Angelica Gabriela Mendoza Madrigal. It required a multidisciplinary team of specialists, in which researchers Juan Vicente Mendez, Georgina Calderon Dominguez, Eduardo Palacios Gonzalez and Humberto Hernandez Sanchez, studying the doctorate in food, at the National School of Biological Sciences, from the Center for Nanoscience and Micro and Nanotechnologies participated, and the Mexican Oil Institute.


Story Source:

The above story is based on materials provided by Investigación y Desarrollo. Note: Materials may be edited for content and length.


Cite This Page:

Investigación y Desarrollo. "New technology detects probiotic organisms in food." ScienceDaily. ScienceDaily, 23 July 2014. <www.sciencedaily.com/releases/2014/07/140723110401.htm>.
Investigación y Desarrollo. (2014, July 23). New technology detects probiotic organisms in food. ScienceDaily. Retrieved November 27, 2014 from www.sciencedaily.com/releases/2014/07/140723110401.htm
Investigación y Desarrollo. "New technology detects probiotic organisms in food." ScienceDaily. www.sciencedaily.com/releases/2014/07/140723110401.htm (accessed November 27, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Thursday, November 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

New Dinosaur Species Found in Museum Collection

New Dinosaur Species Found in Museum Collection

Reuters - Innovations Video Online (Nov. 27, 2014) — A British palaeontologist has discovered a new species of dinosaur while studying fossils in a Canadian museum. Pentaceratops aquilonius was related to Triceratops and lived at the end of the Cretaceous Period, around 75 million years ago. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
Classic Hollywood Memorabilia Goes Under the Hammer

Classic Hollywood Memorabilia Goes Under the Hammer

Reuters - Entertainment Video Online (Nov. 26, 2014) — The iconic piano from "Casablanca" and the Cowardly Lion suit from "The Wizard of Oz" fetch millions at auction. Sara Hemrajani reports. Video provided by Reuters
Powered by NewsLook.com
Pet Dogs to Be Used in Anti-Ageing Trial

Pet Dogs to Be Used in Anti-Ageing Trial

Reuters - Innovations Video Online (Nov. 26, 2014) — Researchers in the United States are preparing to discover whether a drug commonly used in human organ transplants can extend the lifespan and health quality of pet dogs. Video provided by Reuters
Powered by NewsLook.com
From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

From Popcorn To Vending Snacks: FDA Ups Calorie Count Rules

Newsy (Nov. 25, 2014) — The US FDA is announcing new calorie rules on Tuesday that will require everywhere from theaters to vending machines to include calorie counts. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins