JSCS Vol 68, No. 6
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J.Serb.Chem.Soc.
68(6)435–445(2003) |
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The possibilities of the application of some species of sage (Salvia L.)
as auxiliaries in the treatment of some diseases
ANA
S. VELICKOVIC, MIHAILO
S. RISTIC*, DRAGAN T. VELICKOVIC**, STEVAN N. ILIC*** and NATASA D. MITIC**
Medical Center “Mosa Pijade”, Department of General Practice, Rade
Koncara St. 2, 16000 Leskovac,
*Institute for Medicinal Plants Research “Dr. Josif Pancic”, Tadeusa Koscuska
St. 1, 11000 Belgrade,
**AD “Zdravlje” Pharmaceutical and Chemical Industry, Vlajkova St. 199, 16000
Leskovac and
***Faculty of Medicine, Bra}e Taskovi} St. 81, 18000 Nis, Serbia and Montenegro
(Received 5
November 2002)
The chemical composition of four essential oils of four species of sage (Salvia
officinalis L., Salvia pratensis L., Salvia glutinosa L. and
Salvia aethiopis L.) are exAMined by GC-FID and GC-MS analysis. The
presence of some components in the essential oil (mono- and sesquiterpene)
determines the pharmacological effects and therapeutical application of a plant
species. Salvia officinalis L. gives the highest yield of oil (1.1 %),
while the lowest is in Salvia pratensis L. (0.1 %). The investigations
included the determination of the antimicrobic activities of the essential oils
by the diffusion method and the oil of Salvia pratensis L. proved to
have the highest activity.
Keywords: diseases,
therapy, auxiliaries, Salvia L., antimicrobial activity, essential oils,
extracts.
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J.Serb.Chem.
Soc. 68(6)447–453(2003) |
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Thermokinetic study on the inactivation reactions of
1-methylphthalazinium ylids
MARIA
CAPROÔU, LUCIA ODOCHIAN, ÔT. DIMA*, M. DUMITRAÔ and MAGDA PETROVANU
The “Al. I. Cuza” University, Faculty of Chemistry, Bd. Copou 11,
Iasi 6600, Romania and
*The “Dunarea de jos” University, Galati, Romania
(Received
11 October 2002, revised 9 January 2003)
The present paper consists in a thermokinetic study on the dimerization
reactions of 1-methylphthalazinium ylids with –NO2 (ylid 1) and,
respectively, –O–CH3 (ylid 2) substituents in the p position of the
benzoyl radical bound to the ylidic carbanion. From experimental data, the
reaction order and rate constants have been calculated. The reaction order n =
2 confirmed the ylids’ dimerization reactions, while the values of the rate
constants, k2 = 3.093×10-2 L/mol s and,
respectively, 2.16×10-1 L/mol s for the dimerization of ylids 1 and
2 made evident the higher reactivity of ylid 2 versus ylid 1. The sAMe
conclusion is also supported by the results of the thermodynAMic study based on
the chemical affinity of the two reactions, when Aodim,1
< Aodim,2.
Keywords: 1-methylphthalazinium
ylids, dimerization, inactivation, thermokinetics (reaction order, rate
constants, chemical affinity).
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J.Serb.Chem.Soc.
68(6)455–461(2003) |
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Template synthesis of Mn(II) complexes of tetraazAMacrocycles
derived from diAMinoalkanes and 3,4-hexanedione or benzil
RAGHU
N. PRASAD and NITIN GUPTA
Department of Chemistry, University of Rajasthan, Jaipur-302 004,
India
(Received 31 October
2002, revised 8 January 2003)
Template condensation of a-diketones, such as 3,4-hexanedione
or benzil, with 1,n-diAMinoalkanes (where n = 4, 5, 6, 7, 8, 9, 10 or 12) in
the presence of Mn(II) resulted in the formation of complexes of the type
[MnL(NO3)]NO3 (where L = 16 to 32-membered macrocycle).
These complexes have been characterized by elemental analyses, conductances,
magnetic measurements, as well as IR and electronic spectra.
Keywords: macrocyclic complexes, manganese
complexes, IR spectra, electronic spectra.
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J.Serb.Chem.Soc.
68(6)463–470(2003) |
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N O T E
ThermodynAMic and structural studies of complexes of
manganese(II), cobalt(II), nickel(II) and copper(II) with AMinofuropyridine
carboxAMide
M.
G. ABD EL WAHED
Faculty of Science, Zagazig University, Zagazig, Egypt
(Received
11 September 2002, revised 27 January 2003)
Complexes of Mn(II), Co(II), Ni(II) and Cu(II) with
2-AMinofuro[3,2-b]pyridine-3-carboxAMide have been prepared. The stability
constants of the formed complexes were determined at 20, 30, 40 and 50ºC at a
fixed ionic strength, I = 0.1 mol dm-3 (KCl). The values of
the thermodynAMic functions associated with complex formation were calculated
and analyzed in terms of electrostatic and non-electrostatic components. The
complexes were characterized with the help of chemical and spectral data.
Keywords: AMinofuropyridine
carboxAMide, thermodynAMic, conductometric, photometric, spectral properties.
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J.Serb.Chem.Soc.
68(6)471–478(2003) |
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Effect of Na2O/SiO2 mole ratio on the
crystal type of zeolite synthesized from coal fly ash
DUSICA
VUCINIC, IGOR MILJANOVIC, ALEKSANDRA ROSIC and PREDRAG LAZIC
Faculty of Mining and Geology, Djusina 7, 11000 Belgrade, Serbia
and Montenegro
(Received
11 September, revised 5 December 2002)
Coal fly
ash was modified to zeolitic materials by hydrothermal treatment at 90ºC. The
zeolite synthesis was studied as a function of the mole ratio of Na2O/SiO2
in the reaction mixtures. The results showed that NaP1 zeolite is obtained when
the Na2O/SiO2 mole ratio was 0.7. Hydroxysodalite is the
dominant zeolite phase in modified fly ash treated with a higher Na2O
concentration solution (Na2O/SiO2 = 1.3). The IR and XRD
methods were used to determine the phases present in the starting sAMple and in
the zeolitic materials.
Keywords: coal
fly ash, hydrothermal treatment, zeolitic materials.
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J.Serb.Chem.Soc.
68(6)479–495(2003) |
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N O T E
Saturated-liquid heat capacity: new polynomial models and review
of the literature experimental data
JOVAN
D. JOVANOVIC and DUSAN K. GROZDANIC
Faculty of Technology and Metallurgy, University of Belgrade,
Karnegijeva 4, 11000 Belgrade, Serbia and Montenegro
(Received
18 December 2002)
In this paper a review of selected literature experimental data for
saturated-liquid heat capacities was presented. Two-, three- and four-parAMeter
polynomial correlation models are tested on those data. Obtained results lead
to the conclusion that correlation quality depends on the number of parAMeters,
and slightly on the type of models. The best two-, three- and four-parAMeter
models were proposed.
Keywords: heat
capacity, saturated-liquid heat capacity, correlation, polynomial model.
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J.Serb.Chem.Soc.
68(6)497–504(2003) |
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ThermodynAMic and kinetic behavior of hydrogen electrode in a
solution of 0.5 M KClO4 in dimethyl sulphoxide
V.
VOJINOVIC, S. MENTUS* and V. KOMNENIC
Faculty of Metallurgy and Technology, 81000 Podgorica and
*Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12,
11000 Belgrade, Serbia and Montenegro
(Received
22 August 2002, revised 3 March 2003)
The hydrogen electrode on an interface platinum/dimethyl sulphoxide + 0.5 M
KClO4 solution was exAMined from both the thermodynAMic and kinetic
aspect, using HCl as a proton source. The equilibrium potential was shown to
obey a Nernstian dependence on concentration. The voltAMmogrAMs recorded using
a rotating platinum disc electrode evidenced that the cathodic evolution of
hydrogen proceeds under mixed, activation–diffusion control. The diffusion coefficient
of the proton was determined to AMount to 4.5×10-6 cm2 s-1.
In the region of activation control, a Tafel slope of about 0.110 V dec-1
was estimated, which indicates that the Volmer reaction is the rate determining
step.
Keywords: dimethyl sulphoxide, equilibrium potential, hydrogen
electrode, hydrogen evolution, rotating disc.
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J.Serb.Chem.Soc.
68(6)505–510(2003) |
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Preparation of basalt-based glass cerAMics
BRANKO
MATOVIC, SNEZANA BOSKOVIC and MIHOVIL LOGAR*
The Vinca Institute of Nuclear Sciences, P. O. Box 522, 11001
Belgrade and
*Faculty of Mining and Geology, Department of Mineralogy, Djusina 7, Belgrade,
Serbia and Montenegro
(Received 4
March 2002)
Local and conventional raw materials–massive basalt from the Vrelo locality on
Kopaonik mountain–have been used as starting materials to test their
suitability for the production of glass-cerAMics. Crystallization phenomena of
glasses of the fused basalt rocks were studied by X-ray phase analysis, optical
microscopy and other techniques. Various heat treatments were used, and their
influences, on controlling the microstructures and properties of the products
were studied with the aim of developing high strength glass-cerAMic materials.
Diopside CaMg(SiO3)2 and hypersthene ((Mg,Fe)SiO3)
were identifies as the crystalline phases. The final products contained
considerable AMounts of a glassy phase. The crystalline size was in range of
8–480 mm with plate or needle shape. Microhardness, crashing strength and
wears resistence of the glass-cerAMics ranged from 6.5–7.5, from 2000–6300
kg/cm2 and from 0.1–0.2 g/cm, respectively.
Keywords: glass-cerAMics,
microstructure, mechanical properties.
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J.Serb.Chem.Soc.
68(6)511–513(2003) |
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PRELIMINARY COMMUNICATION
The critical apparent density for the free flow of copper powder
KONSTANTIN
I. POPOV, SNEZANA B. KRSTIC and MIOMIR G. PAVLOVIC*
Faculty of Technology and Metallurgy, University of Belgrade,
Karnegijeva 4, 11000 Belgrade and
*ICTM–Center for Electrochemistry, Njegoseva 12, 11000 Belgrade, Serbia and
Montenegro
(Received
26 December 2002)
A method for the determination of the critical apparent density, which permits
the free flow of electrodeposited copper powder is discussed. It was found that
powders the apparent density of which were larger than 2.3 g/cm3 exhibit
free flow. This is in good agreement with the literature data.
Keywords: copper
powder flowability, critical apparent density for free flow.
Copyright &AMp; copy; SHD
2003.
July 15, 2003.
For more information contact: SHD@tmf.bg.ac.yu