| Author (s): |
IONESCU, Lavinel G.
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| Title: |
A TRIBUTE TO PROF. DR. OMAR ABOU EL SEOUD ON HIS 70th BIRTHDAY |
| Abstract: |
Prof. Dr. Omar Abou El Seould was born in Cairo, Egypt on May 21, 1945. He obtained the B.S. and M.S. Degrees in Chemistry from Ain Shams University, Cairo in 1964 and 1966, respectively, and was awarded the Doctor of Chemistry Degree by the University of São Paulo, Brazil in 1972. He has occupied various faculty positions at the University of São Paulo and at the present is Full Professor of Organic Chemistry. His research interests deal with green chemistry, modified biopolymers, synthesis and applications of surfactants, and education in chemistry. He has trained a large number of research scientists including many master and doctoral students and is the author of approximately four hundred scientific works. Prof. Omar Abou El Seoud is the recipient of many scientific prizes and awards including the Presidential Medal of Scientific Merit and is a member of the Brazilian Academy of Science.
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| Keywords: |
History of chemistry, science in Brazil, surfactants, homogeneous catalysis.
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| Year: |
2014
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| Initial page: |
1
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| Final page: |
16
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v22.n22.2014.4_revista2014.pdf |
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| Author (s): |
DALLOUT, Hany M. M.
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| Title: |
SYNTHESIS OF NITROGEN-CONTAINING DISPIROHETEROCYCLES (III) USING NITRILIMINES |
| Abstract: |
A number of new substituted 1,2,4,9,10,12-hexaazadispiro-[4.2.4.2]tetra-deca-2,10-dienes Va-j have been obtained from the reaction of 1,4-cyclohexanedione benzoylhydrazone III with appropriate nitrilimines II. The microanalysis and spectral data of the synthesized compounds are in full agreement with their molecular structure. The microbial features of the synthesized compounds were studied by a known method.
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| Keywords: |
Dispiroheterocycles, benzoylhydrazone, nitrilimines, cycloaddition .
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| Year: |
2014
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| Initial page: |
17
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| Final page: |
26
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v22.n22.2014.20_revista2014.pdf |
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| Author (s): |
FATTAH, Mohy Ei Deen Abdel; MOHAMED, NAGWA Ibrahim ; ASBREY, Heba El
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| Title: |
INSULIN :FROM EGYPTIAN TILAPIA BROCKMANN BODIES |
| Abstract: |
Certain teleost fish have large anatomically discrete islet orga11s called Brockmann bodies (BBs) that are much more easily harvested than pancreatic islets. Brockmann bodies (islet organs) of both types were excised from freshly killed tilapia fish at the Fisheries Center, Faculty of Agriculture of lsmailia, and immediately frozen. Approximately 5.1 g of islet tissue was obtained from 81 fish of approximate weight that ranged from 150-350. These Brockmann bodies (BBs) were subjected to acid/alcohol extraction and gel filtration. Ultraviolet and infrared spectral measurements were performed. The fraction with the highest absorption was studied further and compared to standard insulin. They both showed the presence of alcohol/phenol OH groups and the amide C=O stretch.
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| Keywords: |
Brockmann bodies, Nile tiiapia, insulin.
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| Year: |
2014
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| Initial page: |
27
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| Final page: |
34
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v22.n22.2014.30_revista2014.pdf |
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| Author (s): |
ADEJORO, I. A.; AKINTOYE, B.; ADEBOYE, 0. 0.
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| Title: |
SEMI-EMPIRICAL AND DFT STUDIES OF MIXED-LIGAND COMPLEXES OF CU(II) DIMETHYLGLYOXIM |
| Abstract: |
The non-electrolyte mixed-ligand complexes of the general formula [M(Hdmg)B], M=Cu(II), Hdmg=dimethylgloximato monoanion, B=2-arninophenol(2-aph), diethylamine (dea), or malonic acid (MOH) has been synthesized and characterized. However theoretical calculations were carried out to obtained the geometric properties such as bond length, bond angle, and dihedrals. Thermodynamic parameters, vibrational and electronic properties, dipole moments, and HOMO-LUMO band gaps of the complex with different substituents were also calculated. These properties were obtained using the PM3 and DFT with B3LYP at 6-31G* level. Comparisons were made and it was observed that the calculated data are in good agreement with experimental data.
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| Keywords: |
Geometric parameters, semi-empirical, dipole moments, band gaps modelling.
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| Year: |
2014
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| Initial page: |
35
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| Final page: |
46
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v22.n22.2014.38_revista2014.pdf |
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| Author (s): |
HUSAINA, Asif; AHMADB, Aftab; KHANC, Shah Alam
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| Title: |
NALIDIXIC ACID MUTUAL PRODRUG: SYNTHESIS AND EVALUATION |
| Abstract: |
The aim of this study has been to design a useful drug, which may act with effectiveness both on the gram-positive and gram-negative bacteria (broad-spectrum). An amide-based mutual prodrug (NA-SN) was been prepared following a single-step synthesis by condensing sulfanilamide with nalidixic acid. The compound (NA-SN) was evaluated for in-vitro antibacterial activity against some selected bacteria with significant results. Hydrolysis kinetics of the mutual prodrug were also studied in acidic and basic buffers. The present study reveals the pharmaceutical potential of mutual prodrugs.
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| Keywords: |
Sulfanilamide, quinolone, kinetics, antibacterial.
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| Year: |
2014
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| Initial page: |
47
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| Final page: |
52
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v22.n22.2014.50_revista2014.pdf |
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| Author (s): |
Adejoro, I. A.; Ogede, R. O.; Ibeji, C. U.; Adeboye, 0. 0.
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| Title: |
THE FREE RADICAL BRO MINA TION OF ETHYL PYRIDAZINES: THEORETICAL STUDIES |
| Abstract: |
Theoretical studies on free radical bromination by N-bromosuccinimide were carried out on a range of ethyl-3-methoxy-pyridazine derivatives. The investigations of these reactions performed, in order to develop a convenient and rapid theoretical means of predicting selectivity. The geometry optimizations of the total energies of the reactants and the products were calculated using Semi-empirical; AMI, MNDO, PM3 e Hartree Fock, HF3- 21 G computational methods. The calculation performed using PM3 Hamiltonian gave the best qualitative predictions, thus providing a rapid method for the selectivity of the reactions used in the synthesis of novel heterocyclic analogs of neurotransmitters.
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| Keywords: |
Hartree Fock calculation, semi-empirical calculation, N-bromosuccinimide, pyridazines.
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| Year: |
2014
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| Initial page: |
53
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| Final page: |
60
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v22.n22.2014.56_revista2014.pdf |
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| Author (s): |
SODAMADE, A.
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| Title: |
ASSESSMENT OF NUTRIENT POTENTIAL, MINERAL CONTENT AND AMINO ACID COMPOSITION OF Thaumatococcus daniellii LEAF PROTEIN CONCENTRATES |
| Abstract: |
Freshly harvested Thaumatococcos daniellii, was plucked and processed for its vegetable leaf protein concentrates with a view to evaluate its proximate constituents, amino acid content and mineral composition. Proximate analysis was determined using standard analytical technique. The nutrient composition of the protein concentrates revealed; the moisture content (9.94±0.01), crude fat (6.69±0.23), crude fibre (13.06 ±_0.17), crude protein (52.07 ± 0.20), ash (15.10 ± 0.13) and Carbohydrate (1.12±0.43). The mineral content of the sample indicated that Ca, Mg, K, and Na are the most abundant minerals with the following values Na;70.6±0.42,Ca;19. 70±0.28, K; 90.3±0.42, Mg; 103.9±0. 76, other minerals that were presentin the sample in trace concentration are Fe(2.00 ± 0.46), Zn (2.90± 1.06), Mn (2.50± 0.12), Cu (0.2± 0.58), Pb (0.1± 0.44), while selenium were not detected in the sample indicating that the leaf concentrate is fit for dietary consumption. The amino acid profile reveals favourable nutritional balance with the presence of essential and nonessential amino acids except that tryptophan which was believed to be predominant in animal protein was not detected.
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| Keywords: |
Thaumatococcus daniellii, leaf protein concentrates, amino acid, proximate analysis .
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| Year: |
2014
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| Initial page: |
61
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| Final page: |
78
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v22.n22.2014.64_revista2014.pdf |
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| Author (s): |
NEVES, Paulo Cesar Pereira das; Ionescu, Lavinel G.
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| Title: |
SOME IMPORTANT CONTRIBUTIONS TO BRAZILIAN MINERALOGY |
| Abstract: |
The purpose of this article is to highlight the major contributions to the development of Brazilian Mineralogy from pre-colonial times up to the present. A list is presented including the major figures that played an important role in the development of mineralogy in Brazil during the last five hundred years.
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| Keywords: |
History of mineralogy in Brazil, brazilian minerals .
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| Year: |
2014
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| Initial page: |
79
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| Final page: |
94
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v22.n22.2014.82_revista2014.pdf |
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