Biotechnologia Acta

...

  • Increase font size
  • Default font size
  • Decrease font size
Home
RSS


Print PDF

TECHNOLOGIES OF BRAIN IMAGES PROCESSINGO.M. Klyuchko

"Biotechnologia Acta" V. 10, No. 6, 2017
https://doi.org/10.15407/biotech10.06.005

Abstract
The purpose of present research was to analyze modern methods of processing biological images implemented before storage in databases for biotechnological purposes. The databases further were incorporated into web-based digital systems. Examples of such information systems were described in the work for two levels of biological material organization; databases for storing data of histological analysis and of whole brain were described. Methods of neuroimaging processing for electronic brain atlas were considered. It was shown that certain pathological features can be revealed in histological image processing. Several medical diagnostic techniques (for certain brain pathologies, etc.) as well as a few biotechnological methods are based on such effects. Algorithms of image processing were suggested. Electronic brain atlas was conveniently for professionals in different fields described in details. Approaches of brain atlas elaboration, “composite” scheme for large deformations as well as several methods of mathematic images processing were described as well.

Full text: PDF


 
Print PDF

GLUTAMINE DEPRIVATION EFFECT ON DEK, TPD52, BRCA1, ADGRE5, LIF, GNPDA1, AND COL6A1 GENE EXPRESSIONS IN IRE1 KNOCKDOWN U87 GLIOMA CELLS A. P. Kharkova, Y. A. Garmash, O. S. Hnatiuk, O. Y. Luzina, S. V. Danilovskyi, A.Y. Kuznetsova, O. H. Minchenko

"Biotechnologia Acta" V. No, 6, 2017
https://doi.org/10.15407/biotech10.06.018

Abstract
To study effect of glutamine deprivation on the expression of genes encoding the key proliferation associated factors on a relation to inhibition of inositol requiring enzyme-1 IRE1 in U87 glioma cells was the aim of the research. It was shown that glutamine withdrawal down-regulated the expression of DEK, BRCA1, LIF, and COL6A1 genes in control glioma cells (transfected by empty vector), up-regulated ADGRE5 gene expression, and did not significantly change the expression of TPD52 and GNPDA. Inhibition of ІRE1 signaling enzyme activity modified the effect of glutamine deprivation on the expression of TPD52, BRCA1, LIF, DEK, ADGRE5, and COL6A1 genes: introduces the effect of glutamine deprivation on TPD52 and GNPDA1, reduced – on COL6A1, and enhanced – on ADGRE5, DEK, and BRCA1 in U87 glioma cells. Therefore, glutamine deprivation affect the expression level of most studied genes in U87 glioma cells in relation to the functional activity of IRE1 signaling enzyme, which is responsible for control of cell proliferation and glioma growth.

Full text: PDF


 
Print PDF

WASTEWATER COMPONENTS EFFECT ON METACHROMASIA REACTION OF VOLUTIN GRANULES in vitro Kharchuk M.S., Gromozova E.N.

Ж-л "Biotechnologia Acta" Т. 10, № 6, 2017
https://doi.org/10.15407/biotech10.06.028

Abstract
Microorganisms that contain the polyphosphates volutin granules take active part in phosphorus and heavy metals removal from the wastewater. The metachromatic reaction is a simple cytochemical method for the detection of these granules. The objective of current research was to study the metachromatic reaction of inorganic polyphosphate with Methylene Blue dye in combination with other components of wastewater (proteins, carbohydrates, metal ions) in vitro. It was demonstrated that manifestation of metachromatic coloration depends on the polyphosphate concentration and to a lesser extent, on its chain length. Glucose did not influence metachromasy reaction. At the same time, calcium ions and bovine serum albumin, depending on their concentration, stimulated or inhibited the metachromatic color of the test solutions. Bovine serum albumin, in contrast to calcium ions, had a lesser effect on metachromasy. Thus, the abundant accumulation of polyphosphates and metal cations (as we demonstrated with of Ca2+ ions), in microorganisms of activated sludge not always accompanied by a pronounced reaction of metachromasy of the volutin granules. In this regard, the use of other cytochemical methods for the identification of polyphosphate granules is recommended, for example, staining with fluorescent dye 4’,6-diamidino-2-phenylindole (DAPI).

Full text: PDF


 
Print PDF

EFFECT OF SILVER NANOPARTICLES ON THE PHYSICAL AND CHEMICAL PROPERTIES OF PLANT OILS AND THEIR ANTIMICROBIAL ACTIVITY V. M. Minarchenko, R. V. Kutsyk, N. P. Kovalska, B. O. Movchan, O. V. Hornostai, O. M. Strumenska, L. M. Makhynia

"Biotechnologia Acta" V. 10, No. 6, 2017
https://doi.org/10.15407/biotech10.06.035

Abstract

The aim of our research was to investigate the influence of silver nanoparticles on the physical and chemical features of plant oils of dogrose, flax, cedar, amaranth and watermelon and their antimicrobial activity. Plant oils were saturated with silver nanoparticles using electron-beam technology for depositing a molecular stream of metal in a vacuum. To characterize the rancidity of plant oils, the acid, iodine, peroxide, ester and saponification values were determined. A sharp drop in the iodine number and an increase in the peroxide number in oils saturated with silver nanoparticles were observed, as compared to pure oils, indicating a decrease in the number of unsaturated bonds in fatty acids and the formation of peroxides in oils. All pure plant oils and a separate sample of silver nanoparticles suppressed the growth of only E. faecalis colonies. Plant oils that were saturated with silver nanoparticles delayed the growth of S. aureus, S. epidermidis, E. faecalis, E. coli, P. aeruginosa, and C. albicans; the greatest delay in the growth of colonies was caused by flaxseed oil.

Thus, the features of the plant oils under study essentially changed after they are aturated with silver nanoparticles. It can be assumed that the metal acted as a catalyst for peroxide oxidation of lipids in the investigated plant oil samples, the products of which caused toxic effects on cultures of bacteria and fungi in the experiment.

Full text: PDF

 
Print PDF

STIMULATION OF GROWTH OF SPECIES OF THE FUNGUS OF THE GENUS Pleurotus (Fr.) P. Kumm. AT A GLUCOSE NUTRITION I. V. Pereima, T. V. Ivanova

Biotechnologia Acta, V.. 10, No. 6, 2017
https://doi.org/10.15407/biotech10.06.045

Abstract

The purpose of this study was to evaluate the optimal nutritional conditions for macromycetes micelles of the Pleurotaceae family. The factors influencing mycelium growth on the example of two species of Pleurotus were investigated.
To determine the effects of nutrient components five variants of agar medium were used, containing:potato, sweet potato, yam, oak bark and malt extractswith the addition of peptone and glucose. The pure culture of Pleurotus species, in the form of agarics blocks, was placed on the nutrient media. Hyphae germination was observed on the eighth day of incubation.

The temperature influence was evaluated in the range from 16 to 36 °C. The maximum growth of mycelium of both species was observed at a temperature of 28 °С.

It was determined that nutrient media containing potato, sweet potato, yam and malt extracts with the addition of glucose and peptone were the most favorable for growth of mycelium of oyster mushroom. They all had mandatory presence of a source of carbohydrates — glucose. At the same time, the media containing extracts of oak, yam, and partially of potato extract, were optimal for the growth of maple oyster. According to the experiment, the mycelial growth efficiency of the maple oyster was much higherin comparison to the oyster mushroom 1.

Full text: PDF

 
  • «
  •  Start 
  •  Prev 
  •  1 
  •  2 
  •  3 
  •  4 
  •  5 
  •  6 
  •  7 
  •  8 
  •  9 
  •  Next 
  •  End 
  • »


Page 1 of 9

Additional menu

Site search

Site navigation

Home

Invitation to cooperation

Dear colleagues, we invite you to publish your articles in our journal.
© Palladin Institute of Biochemistry of the National Academy of Sciences of Ukraine, 2008.
All rights are reserved. Complete or partial reprint of the journal is possible only with the written permission of the publisher.
E-mail
for information: biotech@biochem.kiev.ua.