Application of organic acids

Application of Organic Acid Buffer Systems in Shake-Flask Cultures... 

Figures 1 and 2 show relationships among concentrations of U and selected major and trace elements in spinach leaves and petioles, respectively. It is noteworthy that concentrations of U in spinach were significantly positively correlated (p<0.01) with concentrations of Fe and A1 in both leaves and petioles. These relationships suggested that the absorption and transport processes of U in spinach could be related to those of Fe and Al, as was also suggested by Kametani et al. who showed that plants with higher Fe concentrations tended to absorb more U. Less U was extracted by 1 mol L ammonium acetate solution from soil (Table 2), meaning that U in soil was less available to plants. Spinach favours neutral-to-weak alkaline conditions and has the ability to acquire insoluble mineral nutrients such as Fe under neutral-to-alkaline conditions. Helal et al. compared spinach and beans with respect to the ability of the root to uptake Fe and found that spinach root absorbed Fe more efficiently. The differences in Cu, Zn, and Cd uptake by two spinach cultivars were attributed to different abilities to exude oxalate, citrate, and malate from root l The application of organic acids to soil facilitated the phytoextraction of U by hyperaccumulator plants thus, those root exudates could induce U dissolution from soil. Since part of U is associated with Fe and Al minerals in the soil it was likely that the absorption of U was accompanied by Fe and Al absorption, possibly triggered by the secretion of protons or organic acids to solubilise Fe and Al from soil.

Chapter three Application of organic acids in food preservation... 

Table 6.1 Some Effects Detected on Sensory Properties of Subprimal or Retail Cut Red Meat (Beef) after Application of Organic Acids...

Because of a concern that continuous application of organic acids is causing microbial resistance, research is needed on alternative application protocols and to expand the diversity of potential antimicrobials with practical application to food production. To successfully achieve this, it is essential to explore the interaction between the food matrix and food-borne pathogens (Ricke et al., 2005). 

Jensen PE, Ottosen LM, Ahring BK. (2007). Application of organic acids to promote electrodialytic remediation of Pb-contaminated soil fines (<63 my) in suspension. Journal of Chemical Technology and Biotechnology 82 920-928. 

The beneficial application of organic acid salts for shrimps was reported by Tung el al. (2006), who used 5 kg/t Na-citrate and inactivated Lactobacilli to boost the growth of the Kuruma shrimp Masurpenaeus japonicus. 

Siragusa, G. R. and Dickson, J. S. 1992. Inhibition of Listeria monocytogenes on beef tissue by application of organic acids immobilized in a calcium alginate gel. Journal of Food Science, 57 293-296. 

Table 11.1 The productions and applications of organic acids Organic acid Producing strain... 

Podolak, R.K., Zayas, J.F., Kastner, C.L., and Eung, D.Y.C. 1996. Inhibition of Listeria monocytogenes and Escherichia coli0157 H7 on beef by application of organic acids. Journo/ protection, v. 59(4) p. 

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