Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Valeri Petrov"'
Autor:
Kamen Boyadzhiev, Yavor Boyadzhiev, Victoria Haleva, Tzvetana Popova, Juan José García-Granero, Monika Jovanović, Nadezhda Karastoyanova, Victoria Russeva, Orlene McIlfatrick, Beatrijs de Groot, Nikolay Sirakov, Ekaterina Mitrinova, Petko Panchov, Valeri Petrov
Publikováno v:
Studia Praehistorica, Vol 17 (2023)
This paper considers the structure investigated at the largest area (labeled as BII-21B) in the Chalcolithic level BII of Tell Yunatsite, located in the western parts of the Upper Thracian Plain. It collapsed during a sudden fire, which did not affec
Externí odkaz:
https://doaj.org/article/3ee63f07bd354a66bbbe75646df7b38c
Autor:
Angelina Stoyanova-Ivanova, Valeri Petrov, Jorge N. R. Martins, Laura Andreeva, Velizar Georgiev
Publikováno v:
Materials, Vol 17, Iss 11, p 2603 (2024)
The manufacturing of orthodontic archwires made from NiTi alloy has undergone numerous changes from the second half of the last century to modern times. Initially, superelastic-active austenitic NiTi alloys were predominant, followed by thermodynamic
Externí odkaz:
https://doaj.org/article/e8c5fbe1948343bc8a05d4bbdda0b501
Autor:
Angelina Stoyanova-Ivanova, Mirela Georgieva, Valeri Petrov, Jorge N. R. Martins, Laura Andreeva, Alexander Petkov, Nadia Petrova, Velizar Georgiev
Publikováno v:
Materials, Vol 16, Iss 10, p 3776 (2023)
Multiforce nickel–titanium (NiTi) orthodontic archwires release progressively increasing forces in a front-to-back direction along their length. The properties of NiTi orthodontic archwires depend on the correlation and characteristics of their mic
Externí odkaz:
https://doaj.org/article/6536e925e546429ab689ae7dd4f5b857
Autor:
Mirela Georgieva, Angelina Stoyanova-Ivanova, Sabina Cherneva, Valeri Petrov, Violeta Petrova, Laura Andreeva, Valentin Mihailov, Alexander Petkov, Valdek Mikli
Publikováno v:
Biotechnology & Biotechnological Equipment, Vol 35, Iss 1, Pp 1301-1311 (2021)
This study aimed to characterize and compare the latest generation multi-force Bio-active™ orthodontic archwires to determine if there is a change in their physicochemical and mechanical properties during orthodontic treatment. The physicochemical
Externí odkaz:
https://doaj.org/article/4c4c02ed77114fe38b9a4c7d6ae42838
Autor:
Angelina Stoyanova-Ivanova, Mirela Georgieva, Valeri Petrov, Laura Andreeva, Alexander Petkov, Velizar Georgiev
Publikováno v:
Materials, Vol 16, Iss 2, p 483 (2023)
Multiforce orthodontic archwires are thermodynamic wires made of nickel-titanium alloy (Ni-Ti). They release biologically tolerable forces along their length, progressively increasing from front to back. The frontal archwires’ segments distribute t
Externí odkaz:
https://doaj.org/article/0c6cc5f04682465c8c05459b62d113ef
Autor:
Valeri Petrov
Publikováno v:
Българско е-Списание за Археология, Vol 2, Iss 2, Pp 123-133 (2012)
The problems of terminological differentiation of prehistoric settlements and their typology remain poorly discussed in Bulgarian archaeological literature. Information gained in recent years from archaeological excavations demonstrates enormous vari
Externí odkaz:
https://doaj.org/article/ed75ada3401244a584c970284e38e4da
Publikováno v:
2022 International Conference on Information Technologies (InfoTech).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60cc390091e3fcdd83d4e391560c5d23
https://doi.org/10.1109/infotech55606.2022.9897111
https://doi.org/10.1109/infotech55606.2022.9897111
Publikováno v:
2022 International Conference on Information Technologies (InfoTech).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49b7958e6f3cfbee571b4d4a91558175
https://doi.org/10.1109/infotech55606.2022.9897073
https://doi.org/10.1109/infotech55606.2022.9897073
Autor:
I. Ilievska, V. Petrova, A. J. Zaleski, Laura Andreeva, A. Stoyanova-Ivanova, Valdek Mikli, Valeri Petrov
Publikováno v:
Acta Medica Bulgarica, Vol 48, Iss 1, Pp 68-74 (2021)
In modern orthodontics, thermally activated archwires are used more widely in clinical practice, because they have unique properties like superelasticity and bio-compatibility. The aim of the present study was to characterize commercial 35° C Cu-NiT
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b494fa80d49d32e0ded052e869b2d95b
https://doaj.org/article/72aab89f5e8948ea8b179d154f6bcf84
https://doaj.org/article/72aab89f5e8948ea8b179d154f6bcf84
Autor:
V. Mihailov, Violeta Petrova, A. Stoyanova-Ivanova, Sabina Cherneva, Alexander Petkov, Mirela Georgieva, Valdek Mikli, Laura Andreeva, Valeri Petrov
Publikováno v:
Biotechnology & Biotechnological Equipment, Vol 35, Iss 1, Pp 1301-1311 (2021)
This study aimed to characterize and compare the latest generation multi-force Bio-active™ orthodontic archwires to determine if there is a change in their physicochemical and mechanical properties during orthodontic treatment. The physicochemical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ecc9dd4ecc6533f5d583db604fea5122
https://doaj.org/article/4c4c02ed77114fe38b9a4c7d6ae42838
https://doaj.org/article/4c4c02ed77114fe38b9a4c7d6ae42838