Skip to content
N

Nedyalka Valcheva

Publications (7)

Microbiological Research of the Effects of EVODROP Silver Nanoparticle on Escherichia coli, Enterococci and Coliforms

Nedyalka Valcheva, Ignat Ignatov & Fabio Huether · Journal of Advances in Microbiology · 2020

The aim of the study was to analyze the microbiological effects of EVODROP Silver Nanoparticle. A comparative analysеs of the number of bacteria of a given species before and after influence wеre performed. Nanoparticle Silver makes physical changes in the bacterial membrane, lik...

Open access Research Article 10.9734/jamb/2020/v20i1130297

Microbiological Research of the Effects of Electromagnetic Fields of the Bacteria Escherichia coli, Enterococci, Coliforms and Clostridium perfringens

Nedyalka Valcheva & Ignat Ignatov · Microbiology Research Journal International · 2020

The aim of the study was to analyze the microbiological effects of electromagnetic fields with method of Drossinakis with reliable microbiological methods. A comparative analysis of the number of bacteria of a given species before and after electromagnetic influence was performed...

Open access Research Article 10.9734/mrji/2020/v30i930261

Physiological and Molecular-genetic Characteristic of Bacteria Strains, Isolated from Mountain Spring and Mineral Waters in Plovdiv Region, Bulgaria

Nedyalka Valcheva, Ignat Ignatov & Sashka Mihaylova · International Journal of Pathogen Research · 2020

The present study aims to investigate the microbiological research of mineral and spring mountain waters in the region of Plovdiv, Bulgaria. In Bulgaria, there are mineral and mountain spring waters, which are not subjected to physicochemical and microbiological control by the Re...

Open access Research Article 10.9734/ijpr/2020/v4i130105

Microbiological and Physicochemical Research of Thermal Spring and Mountain Spring Waters in the District of Sliven, Bulgaria

Nedyalka Valcheva, Ignat Ignatov & Georgi Dinkov · Journal of Advances in Microbiology · 2020

Defined are the physicochemical properties of four healing non-thermal and thermal spring waters in the area of Sliven District, Bulgaria. The spring waters from the given four water sources are characterized by microbiological indicators and the pathogenic micro-organisms in the...

Open access Research Article 10.9734/jamb/2020/v20i230213

Microbiological and Physicochemical Research of Mountain Spring Waters in Vasiliovska Mountain, Municipality of Teteven, Bulgaria

Ignat Ignatov & Nedyalka Valcheva · Chemical Science International Journal · 2020

Defined are the physicochemical properties of three mountain spring waters in the area of Vasiliovska mountain, Municipality of Teteven, Bulgaria. Vasiliovska mountain is in the central part of Stara Planina (Balkan) mountain. The methodology is including research of physicochemi...

Open access Research Article 10.9734/CSJI/2020/v29i330167

Dynamic Nano Clusters of Water on Waters Catholyte and Anolyte: Electrolysis with Nano Membranes

Ignat Ignatov, Georgi Gluhchev, Stoil Karadzhov, Iliana Yaneva, Nedyalka Valcheva, Georgi Dinkov, Teodora Popova, Toshka Petrova, Dimitar Mehandjiev & Igor Akszjonovics · Physical Science International Journal · 2020

The electrolysis is a base of many industrial processes like galvanotechnics and galvanoplastics. It is also used for hydrogen, and oxygen production. Different products such as H2, NaOH, HCl, heavy water (D2O) and others could be obtained as well depending on the manufacturing c...

Open access Research Article 10.9734/psij/2020/v24i130173