Combined Effects of Acidic Electrolyzed Water and Ultrasound Treatments to Decontaminate Fresh Tumeric

Abstract

The effect of electrolyzed oxidizing water (EO) and ultrasonic waves (US) on pathogenic control of fresh turmeric (Curcuma longa L.) were studied. Electrolyzed water was generated by electrolysis from 5% NaCl solution. The fresh turmeric samples were washed with EO at different concentrations (0, 100, 200, 300 and 400 mg/L residual chlorine). The percentage of reduction of total bacteria, yeast, mold and Escherichia coli was determined by compact dry plate. It was shown that EO at 300 mg/L significantly inhibited the cell growth. Then, the samples were washed with combination of EO and US for 10 minutes. It was shown that combination of EO and US significantly inhibited bacterial growth and EO 200 mg/L with US at 43 kHz had high value of log reduction when compared with other treatments. Therefore, combination of EO and US appeared to increasing pathogenic control of fresh turmeric.

A review of recent advances in the decontamination of mycotoxin and inactivation of fungi by ultrasound

“… Yeast 2 min treatment was insufficient for microbial decontamination. 5 min of sonication with 40 W/cm 2 intensity: (Mesophilic aerobic bacteria: 4.3 log10 CFU/g reduction) (Lactic acid bacteria: <1 log10 CFU/g reduction) (Coliform: was detected only on fourth storage day (1.7 log 10 CFU/g) and seventh day (1.8 log 10 CFU/g)) Yeast: <10 CFU/g 10 min of sonication with 40 W/cm 2 intensity: Mesophilic aerobic bacteria: reduced by 2.8–5.4 CFU/g Other microorganisms were reduced to below the limit of quantification [45] Fresh Tumeric Electrolyzed water & ultrasound Electrolyzed water from 5% NaCl US frequency: 43 kHz treatment time: 10 min E.coli , Mesophilic aerobic bacteria, yeast and molds EO 200 mg/L with US at 43 kHz had high value of log reduction on all microorganisms [52] Wheat grain Ultrasound– anolyte medium US frequency: 22–35 kHz US intensity: 0.3 W/cm 2 to 1.5 W/cm 2 Mesophilic aerobic bacteria and fungi Mesophilic aerobic bacteria and Fungi numbers decreased significantly, the use of US with anolyte has shown a synergistic effect. [39] Green asparagus Bath Reactor Ultrasound Frequency: 40 kHz Power: 360 W Treatment time: 10 min stored for 20 days at 4 ˚C Mesophilic aerobic bacteria/ mold and yeast Mesophilic aerobic bacteria, mold and yeast in the 12th and 16th day of storage decreased significantly [48] Chinese cabbage Sweep ultrasound Frequency: 28, 33, 40, and 68 kHz Treatment time: 10 min Mesophilic aerobic bacteria, yeast and molds The significant reduction for mesophilic bacteria was 0.24–1.83 log CFU/g And for yeast and mold was 0.15–2.26 log CFU/g [3] Cucumber Ultrasound Probe Frequency: 20 kHz Treatment time: 5, 10, and 15 min Mesophilic aerobic bacteria and yeast and molds Most significant reduction after 10 min processing [14] Orange Juice Thermo-ultrasound processor with S3 probe Treatment temperature: 50 ˚C Frequency: 24 kHz S. cerevisiae About 1.5 log reduction in S. cerevisiae [40] Lettuce …”

Antioxidant and Anti-inflammatory Activities of Extract Ethanol Curcuma zedoaria

“…White turmeric or C. zedoaria is recommended to treat inflammation or inflammation, high cholesterol, stomach pain, menstrual disorders, wounds, eczema, jaundice, inflammation, symptoms of cancer, and as a blood purification activity [11], [12]. The part that is often used is the rhizome.…”