TY  - CONF
AU  - Jovanović, Aleksandra A.
AU  - Petrović, Predrag M.
AU  - Đorđević, Verica B.
AU  - Častvan, Ivona M.
AU  - Lević, Steva M.
AU  - Zdunić, Gordana M.
AU  - Bugarski, Branko M.
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6457
AB  - In the present study, spray-dried Thymus serpyllum extracts obtained by using four extraction
techniques (maceration, heat-assisted extraction, extraction in ultrasound bath and extraction by
ultrasound probe) were characterized through determination of total polyphenols and total
flavonoids contents, antioxidant capacity, zeta potential, bulk density and solubility. Polyphenols
yield was statistically higher in the extract obtained by ultrasound probe, in comparison to the
extracts prepared using maceration, heat-assisted extraction and extraction in ultrasound bath.
On the other hand, extraction technique did not show statistically significant influence on the
flavonoids concentration. Furthermore, extraction procedures did not show significant effect on
antioxidant neutralization of DPPH radicals, while flavonoids yield had correlation with the
DPPH radical-scavenging capacity assay. However, the extracts obtained using maceration and
ultrasound waves (ultrasound bath) have shown significantly better antioxidant capacity in the
preservation of β-carotene, compared to the extracts prepared by using high temperature and
ultrasound probe. The extract obtained in maceration has shown statistically better stability
(higher absolute value of zeta potential), compared to the extracts prepared using high
temperature and ultrasound waves. According to the results of Pharmacopoeia test, bulk density
of spray-dried T. serpyllum extracts was ranked by significance in the following order: heatassisted extraction>ultrasound bath and ultrasound probe>maceration. Relatively high
solubility of spray-dried extracts has been found in the following order: maceration>ultrasound
bath and ultrasound probe>heat-assisted extraction. Spray-dried T. serpyllum extract prepared
using maceration represents a powder with satisfying physicochemical properties, as well as a
good source of substances with significant antioxidant activity, particularly in emulsions, which
enable its use in functional food and pharmaceutical products.
PB  - Faculty of Technology, Zvornik
C3  - VI International Congress: „Engineering, Environment and Materials in Processing Industry“
T1  - Spray-dried extracts of Thymus serpyllum
EP  - 200
SP  - 193
DO  - 10.7251/EEMEN1901193J
ER  - 

@conference{
author = "Jovanović, Aleksandra A. and Petrović, Predrag M. and Đorđević, Verica B. and Častvan, Ivona M. and Lević, Steva M. and Zdunić, Gordana M. and Bugarski, Branko M.",
year = "2019",
abstract = "In the present study, spray-dried Thymus serpyllum extracts obtained by using four extraction
techniques (maceration, heat-assisted extraction, extraction in ultrasound bath and extraction by
ultrasound probe) were characterized through determination of total polyphenols and total
flavonoids contents, antioxidant capacity, zeta potential, bulk density and solubility. Polyphenols
yield was statistically higher in the extract obtained by ultrasound probe, in comparison to the
extracts prepared using maceration, heat-assisted extraction and extraction in ultrasound bath.
On the other hand, extraction technique did not show statistically significant influence on the
flavonoids concentration. Furthermore, extraction procedures did not show significant effect on
antioxidant neutralization of DPPH radicals, while flavonoids yield had correlation with the
DPPH radical-scavenging capacity assay. However, the extracts obtained using maceration and
ultrasound waves (ultrasound bath) have shown significantly better antioxidant capacity in the
preservation of β-carotene, compared to the extracts prepared by using high temperature and
ultrasound probe. The extract obtained in maceration has shown statistically better stability
(higher absolute value of zeta potential), compared to the extracts prepared using high
temperature and ultrasound waves. According to the results of Pharmacopoeia test, bulk density
of spray-dried T. serpyllum extracts was ranked by significance in the following order: heatassisted extraction>ultrasound bath and ultrasound probe>maceration. Relatively high
solubility of spray-dried extracts has been found in the following order: maceration>ultrasound
bath and ultrasound probe>heat-assisted extraction. Spray-dried T. serpyllum extract prepared
using maceration represents a powder with satisfying physicochemical properties, as well as a
good source of substances with significant antioxidant activity, particularly in emulsions, which
enable its use in functional food and pharmaceutical products.",
publisher = "Faculty of Technology, Zvornik",
journal = "VI International Congress: „Engineering, Environment and Materials in Processing Industry“",
title = "Spray-dried extracts of Thymus serpyllum",
pages = "200-193",
doi = "10.7251/EEMEN1901193J"
}

Jovanović, A. A., Petrović, P. M., Đorđević, V. B., Častvan, I. M., Lević, S. M., Zdunić, G. M.,& Bugarski, B. M.. (2019). Spray-dried extracts of Thymus serpyllum. in VI International Congress: „Engineering, Environment and Materials in Processing Industry“
Faculty of Technology, Zvornik., 193-200.
https://doi.org/10.7251/EEMEN1901193J

Jovanović AA, Petrović PM, Đorđević VB, Častvan IM, Lević SM, Zdunić GM, Bugarski BM. Spray-dried extracts of Thymus serpyllum. in VI International Congress: „Engineering, Environment and Materials in Processing Industry“. 2019;:193-200.
doi:10.7251/EEMEN1901193J .

Jovanović, Aleksandra A., Petrović, Predrag M., Đorđević, Verica B., Častvan, Ivona M., Lević, Steva M., Zdunić, Gordana M., Bugarski, Branko M., "Spray-dried extracts of Thymus serpyllum" in VI International Congress: „Engineering, Environment and Materials in Processing Industry“ (2019):193-200,
https://doi.org/10.7251/EEMEN1901193J . .