Friday, 23 October 2015 07:39

Fingerprint yields clues to milky way

Written by  Peter Burke
Dr Steve Holroyd is heading the team at Fonterra, which is doing leading edge research into milk ‘fingerprinting’. Dr Steve Holroyd is heading the team at Fonterra, which is doing leading edge research into milk ‘fingerprinting’.

Fonterra scientists' discovery of a new way of extracting more valuable data from a simple milk test has paved the way for developing a new, high-value UHT milk product now being sold in China. 

A breakthrough discovery by scientists at Fonterra's research and development centre in Palmerston North is seen as leading edge, and the work has entered the finals of the NZ Innovation Awards, the winners due to be announced this week.

The discovery is called 'milk finger-printing', implying that, like human fingerprints, each print is different and unique; so too is the milk produced by each of Fonterra's 10,000-plus suppliers.

Every time a tanker calls at a Fonterra shareholders' farm to pick up milk, a small sample is taken and sent in a cooled state to a laboratory near Hamilton. This has been done for years and is essentially a standard quality control measure. But another key function of the test is to analyse the milk for its protein and milksolids.

Dr Steve Holroyd, leading the enhanced 'fingerprinting' test, told Rural News the composition of the milk is analysed using a spectrometer, which shines light through the milk sample.

"When you shine light through milk some of the light is absorbed and depending on the different ratios of fat and protein that generates a spectrum akin to a fingerprint," Holroyd explains. "Each sample is a bit different; there are different levels of protein and the composition is unique to each farm. The spectrometer gives a precise measurement and does it quickly; each day the lab has to process thousands of samples."

Holroyd says the technology is not new and the testing equipment has been around for some time, used in other countries in varying degrees. But the Fonterra scientists have manipulated the software used for analysing the milk sample to produce new and valuable data which has played a part in developing a high quality UHT milk product.

"The additional thing we have done, as well as measuring the fat and protein, is to use that entire spectrum more effectively to mine a whole bunch of additional parameters about the quality of that milk out of that spectrum," Holroyd said.

"We analyse it statistically to gather a lot more information including a whole range of special proteins. The properties of these are more imperative as you get into the greater value add products."

It is Fonterra's ability to identify these special proteins, exploit extra data from existing testing and use it to assist with a high-quality UHT milk for the Chinese market that has put the co-op into the finals of the prestigious NZ Innovation Awards.

Holroyd says they use the software in new ways to get more data and derive greater value from the milk.

When a tanker calls at a farm, milk from this farm is normally mixed in with other milk from other farms and taken back to the processing plant. But, on the basis of the new testing that identifies farms producing the high quality milk for specific products, Fonterra has changed its tanker runs to target specific milk.

This additional mining of information, and the application of that data, has led to Fonterra's Waitoa plant in Waikato producing this special UHT milk for China. The unique milk is collected only from farms in this region.

This research was first designed to focus on food safety after the melamine incident that surfaced in China in October 2008, but this research was soon applied to other quality parameters. The project has been partly funded by the Government's PGP scheme and it will feature in a special PGP expo.

Holroyd and colleagues are now probing for other information using the fingerprinting technology. Unanswered questions remain, but if answered they could lead to new high value add products on supermarket shelves around the world.

More like this

Fonterra's in good shape

Fonterra released its interim results last month, showing a continuation of the strong earnings performance delivered by the co-op through the 2023 financial year. Here’s what Fonterra chair Peter McBride and chief executive Miles Hurrell said about the results…

China trade

OPINION: Last week's revelation that data relating to New Zealand MPs was stolen amid Chinese state-sponsored cyber espionage targeting two arms of the country’s Parliament could test the long-standing trade relations between the two countries.

Featured

Vaccinate against new lepto strain

A vet is calling for all animals to be vaccinated against a new strain of leptospirosis (lepto) discovered on New Zealand dairy farms in recent years.

TV series to combat food waste

Rural banker Rabobank is partnering with Food Rescue Kitchen on a new TV series which airs this weekend that aims to shine a light on the real and growing issues of food waste, food poverty and social isolation in New Zealand.

National

Celebrating success

The Director General of MPI, Ray Smith says it's important for his department to celebrate the success of a whole…

Cyclone's devastating legacy

One of the country's top Māori sheep and beef farms is facing a five-year battle to get back to where it…

Machinery & Products

Factory clocks up 60 years

There can't be many heavy metal fans who haven’t heard of Basildon, situated about 40km east of London and originally…

PM opens new Power Farming facility

Morrinsville based Power Farming Group has launched a flagship New Zealand facility in partnership with global construction manufacturer JCB Construction.

» Latest Print Issues Online

The Hound

Cut with care

OPINION: The new government has clearly signalled big cuts across the public service.

Bubble burst!

OPINION: Your canine crusader is not surprised by the recent news that New Zealand plant-based ‘fake meat’ business is in…

» Connect with Rural News

» eNewsletter

Subscribe to our weekly newsletter