Chilling prior to low intensity pulsed electric field processing improved vitamin C stability of carrot purée (Daucus carotacv. Nantes)

2015 ◽  
Vol 50 (8) ◽  
pp. 1757-1763 ◽  
Author(s):  
Sze-Ying Leong ◽  
Indrawati Oey ◽  
Danielle Clapperton ◽  
Kemal Aganovic ◽  
Stefan Toepfl
Keyword(s):  
Vitamin C ◽  
Electric Field ◽  
Pulsed Electric Field ◽  
Low Intensity ◽  
Carrot Puree

Effect of pulsed electric field processing on carotenoid extractability of carrot purée

2014 ◽  
Vol 49 (9) ◽  
pp. 2120-2127 ◽  
Author(s):  
Shahin Roohinejad ◽  
David W. Everett ◽  
Indrawati Oey
Keyword(s):  
Electric Field ◽  
Pulsed Electric Field ◽  
Carrot Puree

Effects of high-intensity pulsed electric field processing conditions on lycopene, vitamin C and antioxidant capacity of watermelon juice

2009 ◽  
Vol 115 (4) ◽  
pp. 1312-1319 ◽  
Author(s):  
Gemma Oms-Oliu ◽  
Isabel Odriozola-Serrano ◽  
Robert Soliva-Fortuny ◽  
Olga Martín-Belloso
Keyword(s):  
Vitamin C ◽  
Electric Field ◽  
Antioxidant Capacity ◽  
High Intensity ◽  
Pulsed Electric Field ◽  
Processing Conditions ◽  
Watermelon Juice

scholarly journals Effect of high-frequency low-intensity pulsed electric field on protecting SH-SY5Y cells against hydrogen peroxide and β-amyloid-induced cell injury via ERK pathway

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0250491
Author(s):  
Wei-Ting Chen ◽  
Guan-Bo Lin ◽  
Yu-Yi Kuo ◽  
Chih-Hsiung Hsieh ◽  
Chueh-Hsuan Lu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Electric Field ◽  
High Frequency ◽  
Cell Injury ◽  
Neuroprotective Effect ◽  
Specific Area ◽  
Pulsed Electric Field ◽  
Erk Pathway ◽  
Low Intensity ◽  
Β Amyloid

As the most common type of neurodegenerative diseases (NDDs), Alzheimer’s disease (AD) is thought to be caused mainly by the excessive aggregation of β-amyloid protein (Aβ). However, a growing number of studies have found that reactive oxygen species (ROS) play a key role in the onset and progression of AD. The present study aimed to probe the neuroprotective effect of high-frequency low-intensity pulsed electric field (H-LIPEF) for SH-SY5Y cells against hydrogen peroxide (H2O2) and Aβ-induced cytotoxicity. By looking in a systematic way into the frequency- and amplitude-dependent neuroprotective effect of pulsed electric field (PEF), the study finds that H-LIPEF at 200 Hz produces the optimal protective effect for SH-SY5Y cells. The underlying mechanisms were confirmed to be due to the activation of extracellular signal-regulated kinase (ERK) pathway and the downstream prosurvival and antioxidant proteins. Because the electric field can be modified to focus on specific area in a non-contact manner, the study suggests that H-LIPEF holds great potential for treating NDDs, whose effect can be further augmented with the administering of drugs or natural compounds at the same time.

scholarly journals The Effect of Traditional and Non-Thermal Treatments on the Bioactive Compounds and Sugars Content of Red Bell Pepper

Molecules ◽  
2020 ◽  
Vol 25 (18) ◽  
pp. 4287
Author(s):  
Katarzyna Rybak ◽  
Artur Wiktor ◽  
Dorota Witrowa-Rajchert ◽  
Oleksii Parniakov ◽  
Małgorzata Nowacka
Keyword(s):  
Vitamin C ◽  
Electric Field ◽  
Bioactive Compounds ◽  
Sugar Content ◽  
Combined Treatment ◽  
Pulsed Electric Field ◽  
Bell Pepper ◽  
Thermal Treatments ◽  
Total Carotenoids ◽  
Bell Peppers

The aim of the study was an investigation of the effect of traditional and non-thermal treatment on the bioactive compounds of red bell pepper. As a thermal process, blanching in water and in steam was studied, while for non-thermal the sonication, pulsed electric field treatment and their combination were used in this experiment. The red bell peppers were evaluated based on quality attributes such as: total carotenoids content; polyphenols; vitamin C; antioxidant activity and sugars content. Vitamin C and sugar content were analyzed using liquid chromatography and other measurements were determined based on the spectrophotometric method. Results showed that the blanching in water or in steam reduced bioactive compounds concentration; whereas non-thermal treatments as pulsed electric field (PEF) applied separately or in combination with ultrasound (US + PEF) let to obtain similar or slightly lower content of bioactive compounds in comparison to untreated peppers. When sonication (US) and combined treatment as PEF + US were applied; in most cases reduction of bioactive compounds concentration occurred. This effect was probably related to the effect of relatively long (30 min) ultrasound treatment. The application of appropriate parameters of non-thermal processing is crucial for the high quality of processed material.

scholarly journals Effect of high-frequency low-intensity pulsed electric field on protecting SH-SY5Y cells against hydrogen peroxide and β-amyloid-induced cell injury via ERK pathway

2019 ◽  
Author(s):  
Wei-Ting Chen ◽  
Guan-Bo Lin ◽  
Yu-Yi Kuo ◽  
Chih-Hsiung Hsieh ◽  
Chueh-Hsuan Lu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Electric Field ◽  
High Frequency ◽  
Cell Injury ◽  
Neuroprotective Effect ◽  
Specific Area ◽  
Pulsed Electric Field ◽  
Erk Pathway ◽  
Low Intensity ◽  
Β Amyloid

AbstractAs the most common type of neurodegenerative diseases (NDDs), Alzheimer’s disease (AD) is thought to be caused mainly by the excessive aggregation of β-amyloid protein (Aβ). However, a growing number of studies have found that reactive oxygen species (ROS) play a key role in the onset and progression of AD. The present study aimed to probe the neuroprotective effect of high-frequency low-intensity pulsed electric field (H-LIPEF) for SH-SY5Y cells against hydrogen peroxide (H2O2) and Aβ-induced cytotoxicity. By looking in a systematic way into the frequency- and amplitude-dependent neuroprotective effect of pulsed electric field (PEF), the study finds that H-LIPEF at 200 Hz produces the optimal protective effect for SH-SY5Y cells. The underlying mechanisms were confirmed to be due to the activation of extracellular signal-regulated kinase (ERK) pathway and the downstream prosurvival and antioxidant proteins. Because electric field can be modified to focus on specific area in a non-contact manner, the study proposes that H-LIPEF holds great potential for treating NDDs, whose effect can be further augmented with the administering of drugs or natural compounds at the same time.

scholarly journals Possibility of Pulsed Electric Field and Essential Oil Pre-treatment, Microwave-air Dehydration to the Quality of the Dehydrated Sesban (Sesbania sesban) Flower

2021 ◽  
Author(s):  
Nguyen Phuoc Minh
Keyword(s):  
Essential Oil ◽  
Vitamin C ◽  
Electric Field ◽  
Air Temperature ◽  
Phenolic Content ◽  
Pulsed Electric Field ◽  
Sesbania Sesban ◽  
Significant Difference ◽  
Air Dehydration ◽  
Microbial Stability

Non-heat ahead-treatment in advance of the main dehydration is essential to preserve the quality and ensure food safety. Pulsed electric field (PEF) utilizes a high-voltage electric field in a very short duration to inhibit microbes and enzymes while maintaining the most sensory and nutritional characteristics. For thermal sensitive components, the dehydration process should be performed at low temperatures. Freeze dehydration, vacuum dehydration required high cost for equipment, energy consumption, low quantity in long dehydration time. Microwave-air dehydration is considered as a promising alternative technical approach. Sesban (Sesbania sesban) flower contains numerous phytochemical components promoting health-benefit. However, it’s highly perishable after harvesting. Consumers enjoy the dried sesban flower as a healthy drink. This study examined the possibility of PEF ahead-treatment in microbial inhibition and enzymatic inactivation; essential oil and Microwave-air dehydration on retention of total phenolic content (TPC), vitamin C, 2,2 diphenyl-1-picrylhydrazyl of free radical scavenging (DPPH), ferric reducing antioxidant power (FRAP) of the dehydrated sesban flower. Research also monitored the microbial stability of the dehydrated sesban flower during 12 months of preservation. Results showed that PEF at pulse strength 1000 kV/cm, pulse duration 90 µs, pulse number 45 was remarkably inactivated polyphenol oxidase and peroxidase in raw material. Rosemary essential oil soaked for sesban flower before dehydration positively preserved the ascorbic acid, phenolic content and antioxidant capacity. These PEF and essential oil ahead-treatments strongly facilitated for the main Microwave-air dehydration. Among different air temperatures from 20°C to 40°C in microwave-air dehydration, the highest Vitamin C, TPC, DPPH and FRAP of the dried flower were recorded at air temperature from 20°C to 30°C with no significant difference. Meanwhile, airspeed 1.2 m/s showed the highest Vitamin C, TPC, DPPH and FRAP of the dried flower with no significant difference with airspeed 1.4 m/s and 1.6 m/s. There was no significant difference in Vitamin C, TPC, DPPH and FRAP of the dried flower by microwave power from 1.15 to 1.45W/g. Therefore, a combination of microwave and air dehydration at air temperature 25°C, airspeed 1.2 m/s, the microwave energy density of 1.45 W/g was recommended to better preserve vitamin C, TPC, DPPH, FRAP. Microbial stability of the dehydrated flower was also observed during 12 months of storage by 3 month-interval sampling. Coliform, yeast and mold criteria in dried product were stable within acceptable limits.

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