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1

Critical velocity in the transportation of hydromixtures with high fine-grained fractions content

100%
Tahrilova S., Ivanov I.
Zeszyty Naukowe Akademii Rolniczej we Wrocławiu. Melioracja
|
1992
|
nr 41
65-72
2

Slurry pump characteristics for water-hammer investigation

100%
Bournaski E., Ivanov I.
Zeszyty Naukowe Akademii Rolniczej we Wrocławiu. Melioracja
|
1988
|
nr 31
3

Calculation of unsteady slurry pipeline flow due to solid concentration changes

100%
Bournaski E., Ivanov I.
Zeszyty Naukowe Akademii Rolniczej we Wrocławiu. Inżynieria Środowiska
|
1992
|
tom 02
4
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Effect of pressure liquid extraction and ultrasonic irradiation frequency on inulin, phenolic content and antioxidant activity in burdock (Arctium lappa L.) roots

81%
Petkova N., Ivanov I., Mihaylova D., Lante A.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2020
|
tom 19
|
nr 3
Burdock (Arctium lappa L.) roots are traditionally used in folk medicine as diuretic and curing rheumatism, gastritis, gout, throat pain, arthritis and rashes. These pharmacological properties are due to many bioactive compounds such as flavonoids and fructooligosaccharides. Nowadays, the the application of “green” methods for extraction of natural compounds gains more and more attention. The object of the current research was to determine inulin and sugars content, phenolic content and antioxidant potential in 70% ethanol and water extracts obtained by two “green“ extraction methods, namely pressure-liquid extraction and ultrasound-assisted techniques. The content of total fructans, as well as inulin and sugars were analyzed by spectrophotometric resorcinol-thiourea method and high-performance liquid chromatography with refractive index detection. Total phenols and flavonoids were determined by Folin-Chiocalteu and Al(NO₃)₃ reagents. Antioxidant activity was evaluated by four reliable methods (DPPH, ABTS, FRAP and CUPRAC). The established inulin content varied from 0.27 to 4.0 g/100 g dw in prevalence of the ultrasound-assisted extract obtained with water. Additionally, the established phenolic compounds content (from 10.35 to 18.16 mg gallic acid equivalent (GAE)/g dw) and antioxidant activities demonstrated the burdock roots as potential source phytonutrients with health beneficial properties.
5

Alkaloids biosynthesis by Pancratium maritimum L. shoots in liquid culture

81%
Georgiev V., Ivanov I., Berkov S., Pavlov A.
Acta Physiologiae Plantarum
|
2011
|
tom 33
|
nr 3
The process of alkaloid biosynthesis by Pancratium maritimum shoot culture, cultivated under submerged conditions, was investigated. Twenty-two compounds of different structural types of the Amaryllidaceae alkaloids (tyramine, narciclasine, galanthamine, haemanthamine, lycorine, pancracine, tazettine and homolycorine types) were detected in the studied samples from biomass and cultural liquid. Dominant compounds in the shoots were of tyramine, lycorine and haemanthamine types, whereas in the culture media were found mainly lycorine type compounds. Based on the multi-metabolic estimation of the alkaloid metabolism and physiological peculiarities, liquid cultures of P. maritimum shoots could be defined as prospective biological systems for producing bioactive molecules with acetylcholinesterase inhibitory and apoptotic activities.
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