Effects of electric field strength and pulse rise time on physicochemical and sensory properties of apple juice by pulsed electric field

2013 ◽  
Vol 17 ◽  
pp. 85-92 ◽  
Author(s):  
Xiufang Bi ◽  
Fengxia Liu ◽  
Lei Rao ◽  
Jing Li ◽  
Bingjing Liu ◽  
...  
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Rise Time ◽  
Apple Juice ◽  
Pulsed Electric Field ◽  
Sensory Properties ◽  
Pulse Rise Time

scholarly journals Optimization of Pulsed Electric Field as Standalone “Green” Extraction Procedure for the Recovery of High Value-Added Compounds from Fresh Olive Leaves

Antioxidants ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1554
Author(s):  
Vasileios M. Pappas ◽  
Achillia Lakka ◽  
Dimitrios Palaiogiannis ◽  
Vassilis Athanasiadis ◽  
Eleni Bozinou ◽  
...  
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Pulse Duration ◽  
Value Added ◽  
Pulsed Electric Field ◽  
Fine Tuning ◽  
Olive Leaves ◽  
Extraction Technology ◽  
Extraction Chamber

Olive leaves (OLL) are reported as a source of valuable antioxidants and as an agricultural by-product/waste. Thus, a twofold objective with multi-level cost and environmental benefits arises for a “green” standalone extraction technology. This study evaluates the OLL waste valorization through maximizing OLL extracts polyphenol concentration utilizing an emerging “green” non-thermal technology, Pulsed Electric Field (PEF). It also provides further insight into the PEF assistance span for static solid-liquid extraction of OLL by choosing and fine-tuning important PEF parameters such as the extraction chamber geometry, electric field strength, pulse duration, pulse period (and frequency), and extraction duration. The produced extracts were evaluated via comparison amongst them and against extracts obtained without the application of PEF. The Folin-Ciocalteu method, high-performance liquid chromatography, and differential scanning calorimetry were used to determine the extraction efficiency. The optimal PEF contribution on the total polyphenols extractability (38% increase with a 117% increase for specific metabolites) was presented for rectangular extraction chamber, 25% v/v ethanol:water solvent, pulse duration (tpulse) 2 μs, electric field strength (E) 0.85 kV cm−1, 100 μs period (Τ), and 15 min extraction duration (textraction), ascertaining a significant dependence of PEF assisting extraction performance to the parameters chosen.

scholarly journals Pulsed electric field pre-treatment efficiency analysis in processes of biomaterials drying

2019 ◽  
Vol 80 (4) ◽  
pp. 49-54 ◽  
Author(s):  
I. A. Shorstkii ◽  
D. A. Khudyakov
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Mathematical Models ◽  
Electric Field Strength ◽  
Pulsed Electric Field ◽  
Convective Drying ◽  
Efficient Production ◽  
Drying Process ◽  
Drying Time ◽  
Pre Treatment

The transition to an efficient economy and efficient production requires building the foundations for the development of energy efficient technologies and the drying of biomaterials to convert them into useful products. The purpose of this work is to analyze the effectiveness of pretreatment with a pulsed electric field (PEF) in the process of convective drying of biomaterials. The PEF was processed with electric field strength of 2, 4 and 6 kV/cm, the number of pulses 500, with a pulse duration of 50 ?s. Based on the electrical conductivity data of the biomaterial, the index of the disintegration 56% was determined before and after the PEF treatment, which confirms the existence of an electroporation mechanism of the material structure. The drying process is presented with a description of various mathematical models. PEF pre-treatment with the parameters of electric field strength 4 and 6 kV / cm and the number of impulses 500 allowed to reduce the drying time by 13.8% for the value E = 0.02. Total time spent on the drying process reduced by 20-25 minutes. It should be noted that the total energy spent on PEF pre-treatment (<150 W / kg) compared with the energy spent on the drying process is incommensurably small. Statistical analysis of the considered mathematical models showed good convergence of most models with experimental data. The considered technology of pretreatment of PEF can ensure the effective processing of biomaterials in the required amount to obtain high-quality and safe products. Obtained data of the kinetics process can be used to the mathematical model of the drying process design with the use of preliminary treatment processing.

PROSPECTS FOR THE USE OF A PULSED ELECTRIC FIELD IN THE PROCESSING OF INSECT BIOMASS

2021 ◽  
Author(s):  
И.А. ШОРСТКИЙ ◽  
О.С. ПАРНЯКОВ ◽  
С.Н. СМЕТАНА
Keyword(s):  
Amino Acids ◽  
Fatty Acids ◽  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Specific Energy ◽  
Pulsed Electric Field ◽  
Hermetia Illucens ◽  
Processing Technologies ◽  
Insect Biomass

Поиск альтернативных источников белка (микроводоросли, биомасса насекомых) создает необходимость разработки новых перерабатывающих технологий или адаптации существующих с учетом сохранения ценных компонентов сырья. Рассмотрено применение импульсного электрического поля (ИЭП) для обработки биомассы личинок мухи черная львинка (Hermetia Illucens) с последующей конвертацией в пищевые ингредиенты. Исследовали выживаемость личинок насекомых при применении ИЭП, а также определяли эффективность его воздействия как этапа предварительной обработки биомассы насекомых на выход ценных компонентов сырья – белка и жира в составе жмыха, масла и содержащихся в нем жирных кислот и аминокислот. Обработку ИЭП осуществляли с помощью положительных прямоугольных импульсов при напряженности электрического поля 2 и 3 кВ/см и затрачиваемой удельной энергией 5, 10 и 20 кДж/кг на промышленной установке PEF-Cellcrack II Elea (Германия). Масло извлекали горячим прессованием. Показано, что при величине напряженности электрического поля 3 кВ/см и затрачиваемой удельной энергии 5 кДж/кг все насекомые теряют жизнеспособность; их ткани после обработки ИЭП становятся более рыхлыми. Установлено, что применение ИЭП не изменяет качественного состава компонентов полученного масла. Изменение параметров ИЭП при обработке образцов биомассы насекомых существенно не влияет на процесс извлечения масла и содержание жирных кислот и аминокислот в нем. Предварительная обработка биомассы насекомых способствует увеличению выхода масла на 2,5%, аминокислот на 5,7% по сравнению с контрольным образцом без обработки ИЭП. Результаты исследования позволяют рекомендовать применение ИЭП в качестве этапа подготовки биомассы насекомых перед дальнейшей переработкой. The search for alternative sources of protein (microalgae, insect biomass) creates the need to develop new processing technologies or adapt existing ones, taking into account the preservation of valuable raw materials. The use of a pulsed electric field (PEF) for processing the biomass of the larvae of the black lion fly (Hermetia Illucens) with subsequent conversion into food ingredients is considered. We studied the survival of insect larvae when using PEF, and also determined the effectiveness of its effect as a stage of pretreatment of insect biomass on the yield of valuable raw material components – protein and fat in the composition of cake, oil and the fatty acids and amino acids contained in it. Treatment with pulsed electric fields was carried out using positive rectangular pulses at electric field strength of 2 and 3 kV/cm and expended specific energy of 5, 10 and 20 kJ/kg at the PEF-Cellcrack II industrial unit (Elea, Germany). The oil was extracted by hot pressing. It is shown that when the electric field strength is 3 kV/cm and the specific energy consumed is 5 kJ/kg, all insects lose their viability; their tissues become looser after PEF treatment. It is established that the use of PEF does not change the qualitative composition of the components of the resulting oil. Changes in the PEF processing parameters of insect biomass samples do not significantly affect the oil extraction process and the content of fatty acids and amino acids in it. Pretreatment of insect biomass contributes to an increase in the yield of oil by 2,5%, amino acids by 5,7% compared to the control sample without PEF treatment. The results of the study allow us to recommend the use of PEF as a stage of preparation of insect biomass before further processing.

A Picosecond Pulsed Electric Field Strength Measuring Transducer

2014 ◽  
Vol 57 (2) ◽  
pp. 201-205 ◽  
Author(s):  
K. Yu. Sakharov ◽  
V. A. Turkin ◽  
O. V. Mikheev ◽  
M. I. Dobrotvorskii ◽  
A. V. Sukhov
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Measuring Transducer ◽  
Pulsed Electric Field

scholarly journals Lignocellulosic Analysis of Corncob Biomass by Using Non-Thermal Pulsed Electric Field-NaOH Pretreatment

REAKTOR ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 183-191
Author(s):  
Angky Wahyu Putranto ◽  
Sakinah Hilya Abida ◽  
Khodijah Adrebi ◽  
Arta Harianti
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Electric Fields ◽  
Lignin Content ◽  
Gravimetric Method ◽  
Pulsed Electric Field ◽  
Second Generation Bioethanol ◽  
Naoh Pretreatment ◽  
Pretreatment Time

In recent years, the second-generation bioethanol and advanced bio-based material production from biomass are focused on the pretreatment process by separating cellulose components from other components such as lignin and hemicellulose. Therefore, a physicochemical pretreatment method is needed by applying a non-thermal pulsed electric field (PEF) and alkali methods to increase the cellulose availabilities with a short process and low energy input. The aim of this study was to analyze the lignocellulose content of corncob biomass by using non-thermal pulsed electric fields (PEF) and NaOH pretreatment. The pretreatment factors used were the electric field strength of PEF and the pretreatment time. Analysis of the structure and elements of the lignocellulose based on the characteristics of the gravimetric method and SEM-EDX for untreated and treated samples. The results showed that pretreatment of corncobs biomass by using PEF optimally at an electric field strength of 9 kV/cm and pretreatment time of 60 seconds that was increasing cellulose of 40.59% when compared with the control and also decreasing the hemicellulose and lignin content of 12.9% and 2.02%, respectively. Under these conditions, the energy per pulse and specific input energy of PEF required 0.0205 J and 8.72 kJ/L, respectively. The microstructure analysis by using SEM-EDX showed significantly visual differences and was an increase in the percentage of C and O atoms between untreated and treated corncob biomass. Furthermore, the corncob biomass treated by using non-thermal PEF and alkali can become effective and efficient for the next process into cellulose-derived products.Keywords: corncob biomass; pulsed electric field; NaOH; pretreatment; cellulose

scholarly journals Study of Pulsed Electric Field Strength and Drying Method on Antioxidant of Torbangun (Coleus amboinicus L.) Extract

2019 ◽  
Vol 07 (1) ◽  
pp. 91-98
Author(s):  
Shinta Rosalia Dewi ◽  
◽  
Nani Sumarni ◽  
Ni'matul Izza ◽  
Angky Wahyu Putranto ◽  
...  
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Pulsed Electric Field ◽  
Drying Method ◽  
Coleus Amboinicus

Interlaboratory Standard for Calibrating the Primary Standards of the Unit of Pulsed Electric Field Strength

2018 ◽  
Vol 60 (11) ◽  
pp. 1154-1157
Author(s):  
K. Yu. Sakharov ◽  
O. V. Mikheev ◽  
V. A. Turkin ◽  
M. I. Dobrotvorskii ◽  
A. V. Sukhov
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Pulsed Electric Field ◽  
Primary Standards

Effects of Pulsed Electric Field Processing and Storage on the Quality and Stability of Single-Strength Orange Juice

2002 ◽  
Vol 65 (10) ◽  
pp. 1623-1627 ◽  
Author(s):  
Z. AYHAN ◽  
Q. H. ZHANG ◽  
D. B. MIN
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Orange Juice ◽  
Sensory Quality ◽  
Pulsed Electric Field ◽  
Ethyl Butyrate ◽  
Processing And Storage ◽  
And Storage

The effects of pulsed electric field (PEF) processing on microorganisms in orange juice and on the flavor and color of the juice during storage for 112 days at 4 and 22°C were investigated. Single-strength orange juice was PEF processed at an electric field strength of 35 kV/cm for 59 μs and placed into sterilized glass bottles in a sanitary glove box. PEF-processed orange juice was microbiologically stable at 4 and 22°C for 112 days. PEF processing resulted in significant increases in the hydrocarbons d-limonene, α-pinene, myrecene, and valencene (P ≤ 0.05) but did not have any effect on octanal, decanal, ethyl butyrate, and linalool. The levels of hydrocarbon compounds did not change at 4 and 22°C in 112 days. Octanal, decanal, ethyl butyrate, and linalool levels significantly decreased in 14 days at 4°C and in 2 days at 22°C. The decrease in these compounds did not have a significant effect on the sensory quality of the orange juice (P ≥ 0.05). The microorganisms in PEF-processed orange juice, along with the flavor and color of the juice, remained stable at 4°C for 112 days.

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