TY  - JOUR
AU  - Petrović, Silvana
AU  - Löscher, Ralf
AU  - Gorunović, M. S.
AU  - Merfort, Irmgard
PY  - 1999
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5209
AB  - We propose a new model for landslide dynamics under the assumption of a delay failure mechanism. Delay failure is simulated as a delayed interaction between adjacent blocks, which mimics the relationship between the accumulation and feeder part of the accumulation slope. The conducted research consisted of three phases. Firstly, the real observed movements of the landslide were examined to exclude the existence or the statistically significant presence of background noise. Secondly, we propose a new mechanical model of an accumulation landslide dynamics, with introduced delay failure, and with variable friction law. Results obtained indicate the onset of a transition from an equilibrium state to an oscillatory regime if delayed failure is assumed for different cases of slope stiffness and state of homogeneity/heterogeneity of the slope. At the end, we examine the influence of different frictional properties (along the sliding surface) on the conditions for the onset of instability. Results obtained indicate that the increase of friction parameters leads to stabilization of sliding for homogeneous geological environment. Moreover, increase of certain friction parameters leads to the occurrence of irregular aperiodic behavior, which could be ascribed to the regime of fast irregular sliding along the slope.
T2  - Biochemical Systematics and Ecology
T1  - Flavonoid and phenolic acid patterns in seven Hieracium species
VL  - 27
IS  - 6
SP  - 651
EP  - 656
DO  - 10.1016/S0305-1978(98)00128-8
ER  - 

@article{
author = "Petrović, Silvana and Löscher, Ralf and Gorunović, M. S. and Merfort, Irmgard",
year = "1999",
abstract = "We propose a new model for landslide dynamics under the assumption of a delay failure mechanism. Delay failure is simulated as a delayed interaction between adjacent blocks, which mimics the relationship between the accumulation and feeder part of the accumulation slope. The conducted research consisted of three phases. Firstly, the real observed movements of the landslide were examined to exclude the existence or the statistically significant presence of background noise. Secondly, we propose a new mechanical model of an accumulation landslide dynamics, with introduced delay failure, and with variable friction law. Results obtained indicate the onset of a transition from an equilibrium state to an oscillatory regime if delayed failure is assumed for different cases of slope stiffness and state of homogeneity/heterogeneity of the slope. At the end, we examine the influence of different frictional properties (along the sliding surface) on the conditions for the onset of instability. Results obtained indicate that the increase of friction parameters leads to stabilization of sliding for homogeneous geological environment. Moreover, increase of certain friction parameters leads to the occurrence of irregular aperiodic behavior, which could be ascribed to the regime of fast irregular sliding along the slope.",
journal = "Biochemical Systematics and Ecology",
title = "Flavonoid and phenolic acid patterns in seven Hieracium species",
volume = "27",
number = "6",
pages = "651-656",
doi = "10.1016/S0305-1978(98)00128-8"
}

Petrović, S., Löscher, R., Gorunović, M. S.,& Merfort, I.. (1999). Flavonoid and phenolic acid patterns in seven Hieracium species. in Biochemical Systematics and Ecology, 27(6), 651-656.
https://doi.org/10.1016/S0305-1978(98)00128-8

Petrović S, Löscher R, Gorunović MS, Merfort I. Flavonoid and phenolic acid patterns in seven Hieracium species. in Biochemical Systematics and Ecology. 1999;27(6):651-656.
doi:10.1016/S0305-1978(98)00128-8 .

Petrović, Silvana, Löscher, Ralf, Gorunović, M. S., Merfort, Irmgard, "Flavonoid and phenolic acid patterns in seven Hieracium species" in Biochemical Systematics and Ecology, 27, no. 6 (1999):651-656,
https://doi.org/10.1016/S0305-1978(98)00128-8 . .

TY  - JOUR
AU  - Petrović, Silvana
AU  - Gorunović, M. S.
AU  - Wray, V.
AU  - Merford, Irmgard
PY  - 1999
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/5207
AB  - From the aerial parts of Hieracium gymnocephalum the new triterpene, 21α-hydroxy-taraxasterol and flavone diglycosides luteolin 7-O-α-L- rhamnosyl(1 → 6)-β-D-glucoside and luteolin 7-O-β-D-xylosyl(1 → 6)-β-D- glucoside were isolated, as well as further common triterpenes, phenolic acids and flavones. The structures were established from spectral data (UV, MS, 1H and 13C NMR).
PB  - Elsevier Ltd
T2  - Phytochemistry
T1  - A taraxasterol derivative and phenolic compounds from Hieracium gymnocephalum
VL  - 50
IS  - 2
SP  - 293
EP  - 296
DO  - 10.1016/S0031-9422(98)00536-6
ER  - 

@article{
author = "Petrović, Silvana and Gorunović, M. S. and Wray, V. and Merford, Irmgard",
year = "1999",
abstract = "From the aerial parts of Hieracium gymnocephalum the new triterpene, 21α-hydroxy-taraxasterol and flavone diglycosides luteolin 7-O-α-L- rhamnosyl(1 → 6)-β-D-glucoside and luteolin 7-O-β-D-xylosyl(1 → 6)-β-D- glucoside were isolated, as well as further common triterpenes, phenolic acids and flavones. The structures were established from spectral data (UV, MS, 1H and 13C NMR).",
publisher = "Elsevier Ltd",
journal = "Phytochemistry",
title = "A taraxasterol derivative and phenolic compounds from Hieracium gymnocephalum",
volume = "50",
number = "2",
pages = "293-296",
doi = "10.1016/S0031-9422(98)00536-6"
}

Petrović, S., Gorunović, M. S., Wray, V.,& Merford, I.. (1999). A taraxasterol derivative and phenolic compounds from Hieracium gymnocephalum. in Phytochemistry
Elsevier Ltd., 50(2), 293-296.
https://doi.org/10.1016/S0031-9422(98)00536-6

Petrović S, Gorunović MS, Wray V, Merford I. A taraxasterol derivative and phenolic compounds from Hieracium gymnocephalum. in Phytochemistry. 1999;50(2):293-296.
doi:10.1016/S0031-9422(98)00536-6 .

Petrović, Silvana, Gorunović, M. S., Wray, V., Merford, Irmgard, "A taraxasterol derivative and phenolic compounds from Hieracium gymnocephalum" in Phytochemistry, 50, no. 2 (1999):293-296,
https://doi.org/10.1016/S0031-9422(98)00536-6 . .