RESEARCH ARTICLE


Editorial Article - Advancements in Analyzing Food Quality



Savithiry S. Natarajan*
USDA-ARS, Soybean Genomics and Improvement Laboratory, Beltsville, MD. USA.


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© 2013 Savithiry S. Natarajan;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the USDA-ARS, Soybean Genomics and Improvement Laboratory, Beltsville, MD. USA; Tel: (301)504-5258; Fax: 301-504-5728; E-mail: savi.natarajan@ars.usda.gov


Abstract

The continued advancement ofanalytical technologies enables scientists to enhance their research in characterizing food constituents. In ‘The open food science journal’ we publish articles related to all areas of food science and tech-nology and make these freely available to researcher world-wide. In this issue, we have solicited contributions from leading authors covering various aspects of food safety, its characterization and the usage of food products.

In this volume, Clemente et al. [1] presents the results of analyses of sulfide compounds from different cultivars of garlic using sensitive methodology, solid phase microextrac-tion gas chromatography mass spectrometry (SPME/GC/ MS). Garlic has many benefits for human health including anticarcinogenic, antifungal, and antibacterial properties. The high abundance of sulfide in garlic generated significant interest to study different forms of sulfide compounds pre-sent in garlic. However, analyzing these sulfide compounds remained a challenge due to their volatility and unstable na-ture. Clement et al. [1] efficiently quantified the sulfide com-pounds and differentiated organic and non-organic garlic by using Principle Component Analysis (PCA), a commonly used type of multivariate data analysis. Similarly, PCA analysis was used by Amenta et al. [2] to analyze the physi-cal and chemical changes of Sicilian extra virgin olive oil caused by thermal treatment. The olive oil was subjected to thermal treatment and the effects on volatile compounds and viscosity monitored using electronic nose gas chromatogra-phy and rheology. A review article by Liu and White [3] gives an overview of analytical methodologies to extract, purify, and characterize proanthocyanidins from grape seeds. Proanthocyanidins are polyphenolic compounds that can be found in a form known as condensed tannins, which are abundant in tree barks and the outer skins of seeds. Recent advances in the field of nutraceuticals have shown that poly-phenolic compounds found in grapes have beneficial proper-ties, including biological, pharmacological, and chemopro-tective, against free radicals and oxidative stress.

Also in this volume, Gao and Rupasinghe [4] reported on a comparative analyss of acidity in juice of ‘Honeycrisp’ and ‘McIntosh’ apples in relation to delayed cooling treatments and different controlled atmosphere storage conditions. The authors reported that titratable acidity was decreased over the storage period in response to delayed cooling treatment in both ‘Honeycrisp’ and ‘McIntosh’apples. Also, lower titrat-able acidity was detected if delayed cooling treatment was followed by storing the apples in refrigerated air as com-pared to apples stored in controlled atmospheres. This in-formation is useful for reducing the loss of apple fruit quality by managing good practices of different factors including pre-harvest, post-harvest and storing conditions.

In another article in this volume, Perumalla et al. [5] re-ported a study of important safety and control measures to reduce the risk of contamination and inhibit the growth of pathogens during handling and storage of ready-to-eat meat and poultry products. Listeria monocytogenesis a common post-processing bacterial contaminant in ready-to-eat meat. This author reported the effects of potassium lactate (PL), a bacteriostatic agent that acts by extending the lag phase of pathogens, and sodiumdiacetate (SD), a bactericidal agent that acts by lowering the intracellular pH on the bacterial load using low and high fat chicken and turkey hotdog mod-els. Using both compounds the growth of the bacteria was significantly inhibited, thereby prolonging the shelf life of the food products. The authors concluded that fat content had a significant effect on the growth inhibition of the Listeria monocytogenes as indicated by high fat samples exhibiting lower growth inhibition from both PL and SD in the chicken and turkey meat systems.