Volume 56, Iss.6, 2021

Journal of Chemical Technology and Metallurgy

56, Iss. 6, 2021
ISSN 1314-7471 (print)
ISSN 1314-7978 (on line)

EDITOR-IN- CHIEF
Prof. Dr. Bogdana Koumanova
Tel: (+ 359 2) 81 63 302
University of Chemical Technology and Metallurgy
8 Kl. Ohridski, 1756 Sofia, Bulgaria
E-mail: journal@uctm.edu

Co-Editor

Prof. Dr. Dancho Danalev

University of Chemical Technology and Metallurgy, Bulgaria

 

Biological approaches in wastewater treatment (review)

Evgenia Vasileva, Tsvetomila Parvanova-Mancheva, Venko Beschkov

 

Determination of some prohibited substances in food supplements using HPLC with MS or UV detection – view on current development

Zdravka Zaharieva, Tsvetelina Foteva, Veronika Karadjova, Dancho Danalev

 

LED system optimization for photobiomodulation of biological tissues

Plamen Zagorchev, Charilaos Xenodochidis, Milena Georgieva, George Miloshev, Bogomil Andonov, Silvia Dimitrova, Milena Draganova

 

Possible microbial transformation of p-cymene of white oregano essential oils (Origanum heracleoticum L.)

Yana Koleva, Milen Dimov, Stanka Baycheva

 

Lyophilization using ultrasound of enzyme extract of Bacillus Subtilis 2353 with chitinase activity

Nikolay Solakov, Aleksandar Valchkov

 

Comparative physicochemical analysis of oils derived from Nigella Sativa and Coriandrum Sativum L

Poli Radusheva, Aleksandar Pashev, Galina Uzunova, Krastena Nikolova, Galia Gentscheva, Mariyana Perifanova, Maria Marudova

 

Inorganic salt mediation for improved isolation of essential oil from the cinnamon bark

Piyush I. Modi, Jigisha K. Parikh, Meghal A. Desai

 

Biocompatibility of iron oxide nanoparticles

Veselina Uzunova, Aikaterini-Rafailia Tsiapla, Tihomira Stoyanova, Eirini Myrovali, Albena Momchilova, Orestis Kalogirou, Rumiana Tzoneva

 

Optical properties of PAZO polymer composite films doped with particles of a novel copper hydantoin complex

Vanya Lilova, Yordanka Trifonova, Ani Stoilova, Stela Georgieva, Petar Todorov

 

Stability of urea solutions in presence of buffering additives

Mladen E. Lilov

 

Comparison of parallel flow mixing in structured packed bed reactors using particle resolved model and porous media model with validation

Ali Alkhalaf, Kamyar Mohammadpour, Eckehard Specht

 

Study of the impact of modifiers of К₂СО₃ and triethylendiamine on the protection properties of a new type of gas mask carbons exposed to the vapors of Cl₃CNO₂, HCN and (CN)₂

Liliya Manoilova

 

Kinetics of base hydrolysis of tris(1,10-phenanthroline) iron (II) complex in the presence of mixed surfactants of sodium dodecyl sulphate and Triton X - 100: Synergism and catalytic property of mixed micelles

R S S Srikanth Vemuri, Shyamala Pulipaka, Venkata Naga Lakshmi Kilana, Krishna Murthy Mannam

 

Geopolymer from metakaolin and biomass ash for Cu(II) ions adsorption from aqueous solutions: Kinetics and isotherm studies

Aprilina Purbasari, Istadi Istadi, Andri Cahyo Kumoro, Indro Sumantri, Silviana Silviana

 

Exergoeconomic analysis and optimization of a waste tires pyrolysis

Daniela P. Chakyrova, Andrey H. Andreev

 

The modification of road petroleum bitumen with petrochemical wastes and polymers

Elena Emelyanycheva, Ayaz Abdullin

 

Improve of the compressive strength of cementitious matrices based on the ion exchange resin by introducing the modified novolac epoxy polymer

Atiqa Bekhta, Rachid Hsissou, Mohammed Assouag, Ahmed Elharfi

 

Electrochemical properties of an optimized gas-diffusion electrode (GDE) for rechargeable Zn-air batteries

Borislav Abrashev, Miglena Slavova, Emilia Mladenova, Valentin Terziev, Blagoy Burdin, Gergana Raikova, Konstantin Petrov

 

Characterization of Cerro Matoso lateritic ore and synthetic goethite and implications on the solubility-transport mechanism of nickel and cobalt systems

Ifeoma M. Ugwu, David M. Sherman, Davidson E. Egirani

 

Regulations of oxidation of rhenium heptasulphide at rhenium concentrate processing

Roman D. Allabergenov, Vitaliy P. Guro, Sitorabonu N. Rasulova, Edgor T. Safarov, Khayitali F. Adinaev

 

Electrochemical quasicrystalline phase formation in metals

Oleg B. Girin

 

Synthesis and photocatalytic activity of cerium-doped and cerium-boron co-doped TiO₂ nanoparticles

Angelina Stoyanova, Nina Ivanova, Albena Bachvarova-Nedelcheva, Christomir Christov

 

Optimization of Hg-flotation from the Agh-Darreh gold mine tailings

Seyed Hossein Ahmadi, Kianoush Barani, Mohammad Hayati

 

The company culture impact on staff turnover in the manufacturing industry in Bulgaria

Silviya Hristova

 

Basic stages of the on-boarding process to the European system for verification of the medicinal products

Nikolay Karev

 

Guide for Authors

 

TABLE OF CONTENTS 1-6, 2021