Chemistry Journal of Moldova

2017 Volume 12, no.2

NEURAL MODELING AND OPTIMIZATION OF A MECHANICAL-CHEMICAL TREATMENT APPLIED FOR SOME INDUSTRIAL EFFLUENTS. A ROUMANIAN CASE STUDY

Author(s):

Rodica Mariana Diaconescu, Carmen Zaharia


Field: Industrial chemistry
Type: Research paper
Issue: 2017 Volume 12, no.2
Pages: 19-27
Keywords: artificial neural network (ANN), industrial wastewater treatment, multilayers perceptron model (MLP).
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DOI:
dx.doi.org/10.19261/cjm.2017.394   
 
Abstract (PDF)
Graphical Abstract:  The paper proposes an artificial neural network model of multilayers perceptron type (MLP3:10:1) adapted for mechanical-chemical treatment system of an industrial effluent (i.e. coagulation-flocculation - sedimentation applied for an industrial effluent produced in a manufacturing plant of bricks and other ceramics) which is further optimized and tested for its validation.

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SYNTHESIS, STRUCTURE AND INVESTIGATION OF GERMANIUM(IV) AND COPPER(II) COMPLEXES WITH MALIC ACID AND 1,10ʹ-PHENANTHROLINE

Author(s):

Inna Seifullina, Elena Martsinko, Elena Chebanenko, Eleonora Afanasenko, Viktoriya Dyakonenko, Svitlana Shishkina


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2017 Volume 12, no.2
Pages: 28-33
Keywords: germanium(IV) compounds, malic acid, 1,10ʹ-phenanthroline, copper(II) complex, structure.
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DOI:
dx.doi.org/10.19261/cjm.2016.369

Abstract (PDF)
Graphical Abstract: Two crystalline compounds of germanium(IV) with malic acid (HMal) and 1,10ʹ-phenanthroline (phen) - [Ge(HMal)2(phen)]•pheh•2H2O (I) and [CuCl(phen)2][Ge(OH)(HMal)2] (II) were synthesized for the first time and characterized by elemental analysis, IR-spectroscopy and thermogravimetric analysis. There was elucidated from single-crystal X-ray diffraction that two different forms of Germanium are implemented: Ge4+ (I) and hydrolyzed GeOH3+ (II) to form distorted octahedron and pyramid respectively.



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INFLUENCE OF SOFTENING TEMPERATURE OF AZOBENZENE POLYMERS AND EXTERNAL ELECTRIC FIELD ON DIFFRACTION EFFICIENCY OF POLARIZATION HOLOGRAMS

Author(s):

Nicolay Davidenko, Irina Davidenko, Nicolay Kuranda, Elena Mokrinskaya, Valeriy Pavlov, Viacheslav Solntsev, Sergey Studzinsky, Vladimir Syromyatnikov, Vitaliy Tarasenko, Nicolay Chuprina


Field: Physical chemistry and chemical physics
Type: Research paper
Issue: 2017 Volume 12, no.2
Pages: 58-63
Keywords: azobenzene polymer, optical anisotropy, polarization holography, thermoplastic property, surface relief.
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DOI:
dx.doi.org/10.19261/cjm.2016.373

Abstract (PDF)
Graphical Abstract: Growth of the diffraction efficiency and recording velocity was found in the films of copolymers 4-((2- nitrophenyl) diazeniyl)phenylmethacrylate) with octylmethacrylate at room temperature holographic recording for copolymer with less softening temperature. Effect of strengthening of the diffraction efficiency was observed when charging surface of the films with recorded hologram in crown discharge.



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