Chemistry Journal of Moldova

2014 Volume 9, no.2

POLYMER NANOCOMPOSITE BASED ON STYRENE WITH BUTYL METHACRYLATE AND INORGANIC SEMICONDUCTOR CdS

Author(s):

Mihail Iovu, Marius Enachescu, Ion Culeac, Victor Verlan, Stefan Robu, Dionezie Bojin, Iurie Nistor, Ion Cojocaru


Field: Physical chemistry and chemical physics
Type: Research paper
Issue: 2014 Volume 9, no.2
Pages: 74-79
Keywords: nanocomposite, polymer matrix, photoluminescence, exciton
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2014.09(2).11

Graphical Abstract:
 We present experimental results on copolymer-based nanocomposite made of styrene with butyl methacrylate (1:1) and inorganic semiconductor CdS. Thin film composite samples have been characterized by UV-Vis absorption and photoluminescent spectroscopy, as well as by transmission electron microscopy.

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ELECTRONIC CONTROL OF MOLECULAR CONFIGURATION INSTABILITY VIA VIBRONIC COUPLING. PSEUDO JAHN-TELLER STABILIZATION OF VERTICALLY EXCITED STATES OF F2CO, N2H2 AND H2C2O MOLECULES

Author(s):

Natalia Gorinchoy


Field: Physical chemistry and chemical physics
Type: Research paper
Issue: 2014 Volume 9, no.2
Pages: 80-89
Keywords: Pseudo Jahn-Teller effect, stereochemistry, excited states, carbonyl fluoride, diazene, ketene
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2014.09(2).12

Graphical Abstract:
 The pseudo Jahn-Teller effect is employed to explane the origin of structural distortions of carbonyl fluoride, diazene and ketene molecules in the lowest singlet and triplet excited states. It was shown that in all the cases the distortions of the molecules in the excited states are due to the vibronic mixing of considered states with the appropriate by symmetry higher-lying excited states.



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IODIDE IONS SORPTION ON POLYMER AV-17(Cl) AND SORBENT AV-17(Bi)

Author(s):

Vasile Gutsanu


Field: Physical chemistry and chemical physics
Type: Research paper
Issue: 2014 Volume 9, no.2
Pages: 90-98
Keywords: strongly basic anion exchanger, iodide ions, sorption, Bi(III) compounds
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2014.09(2).13

Graphical Abstract:
 The iodide ions sorption from solutions of KI and KI in excess of KCl has been investigated. The strongly basic anion exchangers AV-17 in Cl- form and Varion AD in NO3- form were used as sorbents. Also AV-17 polymer modified with Bi(III)-containing compounds were used. The sorption was performed in static and dynamic conditions. Isotherms are approximated with BET sorption model. The sorption value of iodide ions in the KI solutions with KCl in excess is quite high. It was established that sorption of iodide ions in the form of polyiodide occurs both as a result of anion exchange and as a result of chemisorption.


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LACTOFERRIN: ANALYSIS OF THE STRUCTURE PROFILE

Author(s):

Lilia Anghel


Field: Physical chemistry and chemical physics
Type: Research paper
Issue: 2014 Volume 9, no.2
Pages: 99-106
Keywords: iron, protein, lactoferrin, transferrin, multiple sequence alignment
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2014.09(2).14

Graphical Abstract:
 The multitude of physiological processes in which the binding of iron ions takes part makes its mechanism worth investigating. The multiple sequence alignment method was applied to investigate the structure similarities of five lactoferrin X-ray crystallographic structures and outline the differences and similarities between lactoferrin and serum transferrin. The results of this study provide useful insights into the mechanism of iron-binding of lactoferrin molecule.



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MALDI-TOF INVESTIGATION OF LYSOZYME-ALBUMIN INTERACTION

Author(s):

Marharyta Vasylieva, Taras Gromovoy


Field: Physical chemistry and chemical physics
Type: Short communication
Issue: 2014 Volume 9, no.2
Pages: 107-110
Keywords: MALDI-TOF, albumin, lysozyme, protein-protein interaction
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Abstract (PDF)

DOI:
dx.doi.org/10.19261/cjm.2014.09(2).15

Graphical Abstract: 
Proteins are the main components of living systems therefore they are a subject of study from different points of view. Under certain conditions, proteins are capable of self-organization forming oligomeric structures of various composition and new properties. The investigations of these transformations were carried out on two well known proteins: albumin and lyzozyme. It is shown that associates of albumin and lysozyme are formining in the stoichiometric ratios of 1:1, 1:2, 1:3, 1:4. A similar pattern is observed in the case of albumin dimer.



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IN MEMORY OF CORRESPONDING MEMBER OF ACADEMY OF SCIENCES OF MOLDOVA PROFESSOR MIHAIL REVENCO

Author(s):

Gheorghe Duca, Tudor Lupascu


Field:
Type: Invited paper
Issue: 2014 Volume 9, no.2
Pages: 111-112
Keywords: Mihail Revenco, Analytical Chemistry, Coordination Chemistry.
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DOI:
dx.doi.org/10.19261/cjm.2014.09(2).16

A dedication in memoriam of corresponding member of the Academy of Sciences of Moldova, Professor, Doctor Habilitatus Mihail Revenco (1947-2014). Scientific work and practical results of Professor Mihail Revenco were deservedly appreciated by superior bodies, being awarded the National Award in Science and Technology (1995), Order of “Emeritus” of the Republic of Moldova (1996), “Dimitrie Cantemir” Medal (2006), “Paisie Velcikovsky” Medal (Poland 2011), the Memorial Award “Yurii Simonov” (2012). In 2012, for outstanding results, through Presidential Decree, Professor Mihail Revenco was awarded the Order “Labour Glory”.

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