JournalTOCs

About Help News

Chemical Bulletin of Kazakh National University
[0 followers] Follow

This is an Open Access Journal

Open Access journal
ISSN (Print) 1563-0331 - ISSN (Online) 2312-7554
Published by Al-Farabi Kazakh National University

[1 journal]

Bimetallic Pd-Cu-composites of polyaniline in electrocatalytic
hydrogenation of phenylacetylene
- Authors: Elena Anatolievna Soboleva, Yakha Akhmadovna Visurkhanova, Nina Mikhailovna Ivanova
  Pages: 4 - 14
  Abstract: Bimetallic Pd-Cu-composites of polyaniline prepared by introducing metals (II) chlorides in the process of oxida-tive polymerization of aniline with and without chemical reduction by sodium borohydride are applied to copper cath-ode activation in electrohydrogenation of phenylacetylene in basic aqueous ethanolic solutions of catholyte. Electro-catalytic activity of composites that they exhibited in the process is due to formation of metal particles (and their al-loys) by electrochemical reduction of metal cations in the polymer matrix. The main hydrogenation products are ethyl benzene and 1,4-diphenylbutane, the yields of which influence metal content in the studied composites.
  PubDate: 2017-03-31
  DOI: 10.15328/cb773
Study of the iron nanoparticles phase transformation during thermal
annealing
- Authors: Artem Leonidovich Kozlovskiy, Jumat Beisembekovich Kargin, Malik Zhenisovich Kokarev, Daut Galimzhanovich Mukhambetov
  Pages: 16 - 25
  Abstract: Change in structural properties and phase composition of nanoparticles based on iron oxide was researched in the paper. As a result of conducted studies it was found that during heat treatment oxide phases of (γ-Fe2O3) and α-Fe2O3 maghemite were formed in oxygen atmosphere. Researches of powder array magnetization were showed that the hysteresis loop movement had the form characteristic for ferromagnetic materials. Additionally, loops obtained at different directions of the magnetic field have different characters, which indicate the magnetic anisotropy presence in the samples.
  PubDate: 2017-03-31
  DOI: 10.15328/cb796
Comparative analysis of the mineral and acid composition of Verbascum
thapsus and Verbascum marschallianum
- Authors: Manshuk Muratovna Nykmukanova, Assemgul Turalyeva, Balakyz Kymizgalievna Yeskaliyeva, Gaukhar Shahmanovna Burasheva
  Pages: 26 - 32
  Abstract: Results of the study of the chemical composition of aerial parts of two plant species - Verbascum thapsus and Verbascum marschallianum of the Scrophulariaceae family collected during the fruiting period in the Altai region of Kazakhstan are presented in the article. The quantitative and qualitative composition of biologically active substances was determined. Samples of Verbascum thapsus, contain 0.63% alkaloids, 0.43% saponins, 0.15% organic acids, 2.30% tannins, 1.07% flavonoids, 0.43% coumarins and 1.62% iridoids. Samples of Verbascum marschallianum contain 0.69% alkaloids, 0.50% saponins, 0.65% organic acids, 1.02% tannins, 1.45% flavonoids, 0.96% coumarins, 2.29% iridoids. The variety of biologically active compounds present in the studied plant species results in a wide range of biological activity. A comparative analysis of the mineral, amino and fatty acid composition of plants Verbascum thapsus and Verbascum marschallianum was carried out. The total content of free amino acids was 83.86-85.84%. Analysis of the mineral composition showed the presence of 11 mineral elements: K, Na, Mg, Ca, Cu, Zn, Cd, Pb, Fe, Ni, Mn, which allows us to recommend the studied plants as a raw material rich in macro- and microelements.
  PubDate: 2017-03-31
  DOI: 10.15328/cb788

JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
Fax: +00 44 (0)131 4513327

Home (Search)
Subjects A-Z
Publishers A-Z
Customise
APIs
Your IP address: 54.145.101.33

About JournalTOCs
API
Help
News (blog, publications)