Ivaylo Parushev

Ivaylo Parushev
Medical University of Varna · Department of Clinical Medical Sciences

About

10
Publications
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30
Citations

Publications

Publications (10)
Article
Full-text available
We have investigated the absorption of the V doped Bi12SiO20 in the spectral region 1.45-2 eV (11 696-16 129 cm–1). The observed absorption bands are due to the V2+ and V3+ ions in the same spectral region. These absorption bands do not contain information about the exact energy position of the vanadium levels. Therefore, we have calculated the sec...
Conference Paper
Full-text available
The object of this review article is to follow the current trends in the scientific literature on corrosion in biological fluids of chromium-nickel stainless steels after laser treatment. The paper is organized in three sections. The first section presents the main types of stainless steels according to their microstructure and the application of t...
Conference Paper
Full-text available
The aim of the present paper is to investigate the geometrical characteristics and density of Ti6Al4V alloy produced by CAD/CAM milling and selective laser melting (SLM). Two groups of prismatic samples (plates) were manufactured by milling and SLM. The width and thickness of the specimens were measured and the average value was used in the analysi...
Article
Full-text available
In this study, the bromide minerals solubility in the mixed system NH4Br-CaBr2-H2O have been investigated at T = (298.15 and 323.15) K by the physico-chemical analysis method. According to the data obtained NH4Br-CaBr2-H2O system is of a simple eutonic type at both temperatures. At standard temperature the equilibrium crystallization of NH4Br (cr)...
Article
Full-text available
Reaction of 4-sulfinylated or 4-sulfonylated allenecarboxylates with different electrophilic reagents such as sulfuryl chloride, bromine, benzenesulfenyl, and benzeneselenenyl chlorides takes place with 5-endo-trig cyclization or 3,2-addition reaction depending on the kind of the substituent at the sulfur atom. Treatment of 4-(benzenesulfinyl)-alle...
Article
The reaction of the 4-phosphorylated allenecarboxylates with different electrophilic reagents such as sulfuryl chloride, bromine, benzenesulfanyl, and benzeneselanyl chlorides takes place with a 5-endo-trig cyclization or 2,3-addition reaction depending on the kind of the substituents in the phosphoryl group. Treatment of the 4-(dimethoxyphosphopyl...
Article
Full-text available
This reaction proceeds via an atom economical [2,3]-sigmatropic rearrangement of 2-heteroatom-functionalized alk-3-ynecarboxylates.
Article
An efficient method for regioselective synthesis of 4‐heteroatom‐functionalized allenecarboxylates by an atom economical [2,3]‐sigmatropic rearrangement of the mediated 2‐heteroatom‐functionalized alk‐3‐ynecarboxylates is described. Alkyl 4‐(dimethoxyphosphoryl), (diphenylphosphinoyl), (benzenesulfinyl), or (methanesulfonyl)‐alka‐2,3‐dienoates can...

Projects

Project (1)
Project
To study the corrosion in biological fluids of chromium-nickel stainless steel after laser surface treatment. The project deals with investigation of austenitic chrome-nickel stainless steel surface melted with a laser and subjected to corrosion tests in Ringer's solution and artificial saliva with different acidity.