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1

Is it simple to explain simple experiments? The interleaved books experiment

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2019

Language:

english

File:

PDF, 1.25 MB

english, 2019

2

Is it simple to explain simple experiments? The ‘heavy newspaper’ stick break

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2020

Language:

english

File:

PDF, 574 KB

english, 2020

3

Once more about the Cartesian diver

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2020

Language:

english

File:

PDF, 521 KB

english, 2020

4

Once more about the Cartesian diver

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2020

File:

PDF, 521 KB

2020

5

A New Way to Demonstrate the Rainbow

Ivanov, Dragia Trifonov, Nikolov, Stefan Nikolaev

Journal:

The Physcis Teacher

Year:

2016

Language:

english

File:

PDF, 2.78 MB

english, 2016

6

The anomalous thermal expansion of water

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2020

File:

PDF, 1.34 MB

2020

7

Demonstrating mirage in air in the lab

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2019

File:

PDF, 881 KB

2019

8

Is it simple to explain simple experiments? The ‘heavy newspaper’ stick break

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2020

File:

PDF, 574 KB

2020

9

Pencil and paper demonstration of the Hall effect

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2016

Language:

english

File:

PDF, 399 KB

english, 2016

10

The Hall effect is not so easy to detect after all

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2017

Language:

english

File:

PDF, 213 KB

english, 2017

11

Molecular engine boat

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2019

Language:

english

File:

PDF, 993 KB

english, 2019

12

Is It Simple to Explain Simple Experiments?: An Unusual Version of the Magdeburg Experiment with a Kitchen Blender

Ivanov, Dragia Trifonov, Nikolov, Stefan Nikolaev

Journal:

The Physcis Teacher

Year:

2020

File:

PDF, 1.95 MB

2020

13

Demonstrations of wave optics (interference and diffraction of light) for large audiences using a laser and a multimedia projector

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2011

Language:

english

File:

PDF, 692 KB

english, 2011

14

In vitro effect of diosgenin, isolated from Asparagus officinalis, in a dopamine model of oxidative stress in isolated rat synaptosomes

Magdalena Kondeva-Burdina, Merce Unzeta Lopez, Mitka Mitcheva, Stefan Nikolov

Journal:

Toxicology Letters

Year:

2007

Language:

english

File:

PDF, 80 KB

english, 2007

15

Testing Bernoulli’s law

Ivanov, Dragia, Nikolov, Stefan, Petrova, Hristina

Journal:

Physics Education

Year:

2014

Language:

english

File:

PDF, 1.99 MB

english, 2014

16

Is it simple to explain simple experiments? (The metre-stick experiment)

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2012

Language:

english

File:

PDF, 575 KB

english, 2012

17

Optics demonstrations using cylindrical lenses

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2015

Language:

english

File:

PDF, 1.77 MB

english, 2015

18

Flavonoids from Astragalus onobrychis

Benbassat, Niko, Nikolov, Stefan

Journal:

Year:

1995

Language:

english

File:

PDF, 60 KB

english, 1995

19

An Analytical Study of the Roadway Automobile Stability

Nikolov, Svetoslav, Bachvarov, Stefan

Journal:

Systems Analysis Modelling Simulation

Year:

2002

Language:

english

File:

PDF, 261 KB

english, 2002

20

Electrostatics experiments with sharp metal points

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2016

Language:

english

File:

PDF, 1.24 MB

english, 2016

21

Demonstrating mirage in air in the lab

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2019

Language:

english

File:

PDF, 881 KB

english, 2019

22

Palaeoenvironmental evaluation by geochemical proxies of fluvioâlacustrine core log from the Late MioceneâPliocene Maritsa Iztok Basin, Bulgaria

Milakovska, Zlatka, Stefanova, Maya, Vladislavov, Georgi, Nikolov, Petar, Marinov, Stefan

Journal:

Geological Journal

Year:

2020

File:

PDF, 2.92 MB

2020

23

[IEEE 2019 II International Conference on High Technology for Sustainable Development (HiTech) - Sofia, Bulgaria (2019.10.10-2019.10.11)] 2019 II International Conference on High Technology for Sustainable Development (HiTech) - Optimizing the Selection of the Weighting Matrices Q and R in Linear Quadratic Regulator

Kambushev, Martin, Bilyderov, Stefan, Dimitrova, Reneta, Nikolov, Stiliyan

Year:

2019

File:

PDF, 213 KB

2019

24

ChemInform Abstract: 3-O-Sulfo-triterpenoid Saponins (I) from Gypsophila trichotoma Wend.

Ilina Krasteva, Kristina Jenett-Siems, Maki Kaloga, Stefan Nikolov

Journal:

Year:

2009

File:

PDF, 17 KB

2009

25

Effect of vacuum-packaging on the changes of Russian sturgeon muscle lipids during frozen storage

Dessislav Balev, Galin Ivanov, Stefan Dragoev, Hristo Nikolov

Journal:

European Journal of Lipid Science and Technology

Year:

2011

Language:

english

File:

PDF, 110 KB

english, 2011

26

Structure and stability of arthropodan hemocyanin Limulus polyphemus

Pavlina Dolashka-Angelova, Alexander Dolashki, Stefan Stevanovic, Rumijana Hristova, Boris Atanasov, Peter Nikolov, Wolfgang Voelter

Journal:

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Year:

2005

Language:

english

File:

PDF, 642 KB

english, 2005

27

Deactivation processes and hydrogen bonding of excited N-substituted acridones

Peter Nikolov, Irina Petkova, Gottfried Köhler, Stefan Stojanov

Journal:

Journal of Molecular Structure

Year:

1998

Language:

english

File:

PDF, 460 KB

english, 1998

28

Peculiarities in the photophysical properties of some 6-styryl-2,4-disubstituted pyrylium salts

Peter Nikolov, Stefan Metzov

Journal:

Journal of Photochemistry and Photobiology A: Chemistry

Year:

2000

Language:

english

File:

PDF, 304 KB

english, 2000

29

Spectroscopic and computational investigation of the ground and low excited states of some symmetrical heterocyclic disulfides

Stefan Stoyanov, Tatyana Stoyanova, Pericles D. Akrivos, Petros Karagiannidis, Peter Nikolov

Journal:

Journal of Heterocyclic Chemistry

Year:

1996

File:

PDF, 298 KB

1996

30

Protective Effects of a Purified Saponin Mixture from Astragalus corniculatus Bieb., in vivo Hepatotoxicity Models

Vessela Vitcheva, Rumyana Simeonova, Ilina Krasteva, Stefan Nikolov, Mitka Mitcheva

Journal:

Phytotherapy Research

Year:

2012

Language:

english

File:

PDF, 184 KB

english, 2012

31

Flavonol glycosides from Chenopodium foliosum Asch

Zlatina Kokanova-Nedialkova, Daniel Bücherl, Stefan Nikolov, Jörg Heilmann, Paraskev T. Nedialkov

Journal:

Phytochemistry Letters

Year:

2011

Language:

english

File:

PDF, 243 KB

english, 2011

32

A new tectonic discontinuity in the Betic Cordillera deduced from active tectonics and seismicity in the Tabernas Basin

Carlos Sanz de Galdeano, Stefan Shanov, Jesús Galindo-Zaldívar, Alexander Radulov, Gabriel Nikolov

Journal:

Journal of Geodynamics

Year:

2010

Language:

english

File:

PDF, 2.93 MB

english, 2010

33

From research to implementation: Nature conservation in the Eastern Rhodopes mountains (Greece and Bulgaria), European Green Belt

Stefan Schindler, Nuno Curado, Stoyan C. Nikolov, Elzbieta Kret, Beatriz Cárcamo, Giorgos Catsadorakis, Kostas Poirazidis, Thomas Wrbka, Vassiliki Kati

Journal:

Journal for Nature Conservation

Year:

2011

Language:

english

File:

PDF, 849 KB

english, 2011

34

Triterpenoids in Gypsophila trichotoma Wend.

Maya Yotova, Ilina Krasteva, Kristina Jenett-Siems, Petranka Zdraveva, Stefan Nikolov

Journal:

Phytochemistry Letters

Year:

2012

Language:

english

File:

PDF, 251 KB

english, 2012

35

Effect of rhamnocytrine-4′-beta-d-galactopyranoside, isolated from Astragalus hamosus L., in combination with cyclophosphamide on cell viability in freshly isolated rat hepatocytes

Magdalena Kondeva-Burdina, Mitka Mitcheva, Ilina Krasteva, Stefan Nikolov

Journal:

Toxicology Letters

Year:

2009

Language:

english

File:

PDF, 79 KB

english, 2009

36

Flavonoids from Astragalus hamosus

Krasteva, Ilina, Platikanov, Stefan, Nikolov, Stefan, Kaloga, Maki

Journal:

Natural Product Research

Year:

2007

Language:

english

File:

PDF, 109 KB

english, 2007

37

Biofunctional Micropatterning of Thermoformed 3D Substrates

Waterkotte, Björn, Bally, Florence, Nikolov, Pavel M., Waldbaur, Ansgar, Rapp, Bastian E., Truckenmüller, Roman, Lahann, Jörg, Schmitz, Katja, Giselbrecht, Stefan

Journal:

Advanced Functional Materials

Year:

2014

Language:

english

File:

PDF, 1.07 MB

english, 2014

38

Measuring Boltzmann’s constant with carbon dioxide

Ivanov, Dragia, Nikolov, Stefan

Journal:

Physics Education

Year:

2013

Language:

english

File:

PDF, 2.71 MB

english, 2013

39

Effect of Purified Saponin Mixture from Astragalus corniculatus on Toxicity Models in Isolated Rat Hepatocytes

Mitcheva, Mitka, Kondeva-Burdina, Magdalena, Vitcheva, Vessela, Krasteva, Ilina, Nikolov, Stefan

Journal:

Pharmaceutical Biology

Year:

2008

Language:

english

File:

PDF, 93 KB

english, 2008

40

Phytochemical analysis and in vitro cytotoxic activity of volatiles from Astragalus corniculatus

Krasteva, Ilina, Platikanov, Stefan, Momekov, Georgi, Konstantinov, Spiro, Nikolov, Stefan

Journal:

Natural Product Research

Year:

2008

Language:

english

File:

PDF, 128 KB

english, 2008

41

Photolithographic Patterning of 3D-Formed Polycarbonate Films for Targeted Cell Guiding

Hirschbiel, Astrid F., Geyer, Simone, Yameen, Basit, Welle, Alexander, Nikolov, Pavel, Giselbrecht, Stefan, Scholpp, Steffen, Delaittre, Guillaume, Barner-Kowollik, Christopher

Journal:

Advanced Materials

Year:

2015

Language:

english

File:

PDF, 3.22 MB

english, 2015

42

Hepatoprotective effects of saponarin, isolated from Gypsophila trichotoma Wend. on cocaine-induced oxidative stress in rats

Vitcheva, Vessela, Simeonova, Rumyana, Krasteva, Ilina, Yotova, Maya, Nikolov, Stefan, Mitcheva, Mitka

Journal:

Year:

2011

Language:

english

File:

PDF, 265 KB

english, 2011

43

Pharmacognostic investigations of the aerial parts of Chenopodium foliosum Asch. and radical-scavenging activities of five flavonoids isolated from methanol extract of the plant

Kokanova-Nedialkova, Zlatina, T Nedialkov, Paraskev, D Nikolov, Stefan

Journal:

Pharmacognosy Journal

Year:

2014

Language:

english

File:

PDF, 373 KB

english, 2014

44

Volatiles from Four Astragalus Species: Phenological Changes and their Chemotaxonomical Application

Platikanov, Stefan, Nikolov, Stefan, Pavlova, Dolja, Evstatieva, Ljuba, Popov, Simeon

Journal:

Zeitschrift für Naturforschung C

Year:

2005

Language:

english

File:

PDF, 92 KB

english, 2005

45

A new saponin lactone from Astragalus corniculatus

Krasteva, Ilina, Nikolov, Stefan, Kaloga, Maki, Mayer, Gisela

Journal:

Natural Product Research

Year:

2007

Language:

english

File:

PDF, 89 KB

english, 2007

46

Fluorescence and Absorption Spectra of Phenylazopyrazolone Dyes

Nikolov, Peter, Fratev, Filip, Stoyanov, Stefan, Polansky, Oskar E.

Journal:

Zeitschrift für Naturforschung A

Year:

1981

Language:

english

File:

PDF, 4.74 MB

english, 1981

47

Major psychiatric disorders and the serotonin transporter gene (SLC6A4): family-based association studies

Dimitrova, Albena, Georgieva, Lyudmila, Nikolov, Ivan, Poriazova, Nadejda, Krastev, Stefan, Toncheva, Draga, Owen, Michael J., Kirov, George

Journal:

Psychiatric Genetics

Year:

2002

Language:

english

File:

PDF, 109 KB

english, 2002

48

Steady State and Dynamic Photophysical Properties of 2-Benzoimidazoleacetonitrile- α-Phenylmethylenes and 1-Aryl-2,2-Dicyanoethenes

Petkova, Irina, Nikolov, Peter, Metzova, Stefan

Journal:

Zeitschrift für Naturforschung A

Year:

2004

Language:

english

File:

PDF, 90 KB

english, 2004

49

Media Effect upon the Fluorescence Ability of Differently Substituted α-Cyanostilbenes

Nikolov, Peter, Petkova, Irina, Stoyanov, Stefan

Journal:

Zeitschrift für Naturforschung A

Year:

2001

Language:

english

File:

PDF, 4.35 MB

english, 2001

50

Triterpenoid Saponins from Astragalus corniculatus

Krasteva, Ilina, Nikolov, Stefan, Kaloga, Maki, Mayer, Gisela

Journal:

Zeitschrift für Naturforschung B

Year:

2006

Language:

english

File:

PDF, 62 KB

english, 2006

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