Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

How can the quality of Garden and orchard produce be measured?

17.06.2004


Optimising and standardising trials on the resistance of orchard fruit to the harvesting and picking processes, increasingly used to determine quality, was the aim of the PhD presented by Martín Sanmartín Goñi at the en Public University of Navarre.

Handling and conservation

The harvesting, transport and conservation of fruit and garden produce is currently carried out mechanically. In these processes of product handling, they can be subject to bangs, vibrations and crushing which all have an influence on their subsequent conservation.



Given this, it is necessary to determine to what extent fruit and garden produce can resist mechanical forces. One of these mechanical properties, one which moreover provides more information than most, is the resistance to cutting.

Trials on the resistance to cutting have been used by many researchers to different ends. However, normally there is no mention in the literature of the parameters taken into account when carrying out such tests.

To address this lack of standards was precisely the aim of Martín Sanmartín Goñi’s PhD. So, after analysing the various test parameters, he concluded that the diameter is the parameter that has most influence in resistance to cutting of fruit and garden produce. Thus, for the test parameters for cutting sections to be comparable, the diameter of the cut sections have to be determined; the compression pressure exercised on them should be less than 0.08 N/mm2 and the velocity of the cutting should be less than 0.6 mm/s. The length of the cutting could be the most convenient parameter.

Trials with potatoes

In order to carry out the trials, Sanmartín Goñi used two materials: vegetable material (potato) and, as a control, an inert one (polyurethane). Apart from the diameter, another variable parameter was taken into account: the length of the cut section. Apart from these, two other important trial conditions were the compression pressure exercised and the velocity of the cutting.

Sanmartín Goñi concluded that the length of the section could be the most convenient parameter, given that this does not have a great influence on the test results.

Contact :
Iñaki Casado Redin
Nafarroako Unibertsitate Publikoa
inaki.casado@unavarra.es
(+34) 948 16 97 82

Iñaki Casado Redin | Basque research
Further information:
http://www.basqueresearch.com/berria_irakurri.asp?Gelaxka=1_1&Berri_Kod=510&hizk=I
http://www.unavarra.es

More articles from Agricultural and Forestry Science:

nachricht New parsley virus discovered by Braunschweig researchers
17.05.2019 | Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH

nachricht Franco-German research initiative on low-pesticide agriculture in Europe
16.05.2019 | Leibniz-Zentrum für Agrarlandschaftsforschung (ZALF) e.V.

All articles from Agricultural and Forestry Science >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Self-repairing batteries

UTokyo engineers develop a way to create high-capacity long-life batteries

Engineers at the University of Tokyo continually pioneer new ways to improve battery technology. Professor Atsuo Yamada and his team recently developed a...

Im Focus: Quantum Cloud Computing with Self-Check

With a quantum coprocessor in the cloud, physicists from Innsbruck, Austria, open the door to the simulation of previously unsolvable problems in chemistry, materials research or high-energy physics. The research groups led by Rainer Blatt and Peter Zoller report in the journal Nature how they simulated particle physics phenomena on 20 quantum bits and how the quantum simulator self-verified the result for the first time.

Many scientists are currently working on investigating how quantum advantage can be exploited on hardware already available today. Three years ago, physicists...

Im Focus: Accelerating quantum technologies with materials processing at the atomic scale

'Quantum technologies' utilise the unique phenomena of quantum superposition and entanglement to encode and process information, with potentially profound benefits to a wide range of information technologies from communications to sensing and computing.

However a major challenge in developing these technologies is that the quantum phenomena are very fragile, and only a handful of physical systems have been...

Im Focus: A step towards probabilistic computing

Working group led by physicist Professor Ulrich Nowak at the University of Konstanz, in collaboration with a team of physicists from Johannes Gutenberg University Mainz, demonstrates how skyrmions can be used for the computer concepts of the future

When it comes to performing a calculation destined to arrive at an exact result, humans are hopelessly inferior to the computer. In other areas, humans are...

Im Focus: Recording embryonic development

Scientists develop a molecular recording tool that enables in vivo lineage tracing of embryonic cells

The beginning of new life starts with a fascinating process: A single cell gives rise to progenitor cells that eventually differentiate into the three germ...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

SEMANTiCS 2019 brings together industry leaders and data scientists in Karlsruhe

29.04.2019 | Event News

Revered mathematicians and computer scientists converge with 200 young researchers in Heidelberg!

17.04.2019 | Event News

First dust conference in the Central Asian part of the earth’s dust belt

15.04.2019 | Event News

 
Latest News

Synthesis of helical ladder polymers

21.05.2019 | Materials Sciences

Ultra-thin superlattices from gold nanoparticles for nanophotonics

21.05.2019 | Materials Sciences

Chaperones keep the tumor suppressor protein p53 in check: How molecular escorts help prevent cancer

21.05.2019 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>