| Author (s): |
IONESCU, Lavinel G.
|
| Title: |
TADASHI TOKUHIRO, PROMINENT SPECIALIST IN NMR RELAXATION PHENOMENA AND MOLECULAR DYNAMICS |
| Abstract: |
Tadashi Tokuhiro was born in Yokohama, Japan in 1930 and passed away in Grapevine, Texas, the USA in 2010. He obtained a Ph.D. in Chemical Physics from the Tokyo Institute of Technology in 1962. He held faculty positions at many universities, including the University of Detroit, Massachusetts Institute of Technology, and Missouri University of Science and Technology. His main research interest dealt with the physical and engineering application of gels, nuclear magnetic resonance relaxation phenomena, molecular dynamics, and characterization ofbiotissues by NMR methods. He published many scientific articles in widely respected journals from Japan, United States, and Great Britain.
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| Keywords: |
History of chemistry, physical chemistry, chemical physics, NMR spin lattice relaxation, molecular dynamics.
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| Year: |
2011
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| Initial page: |
1
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| Final page: |
16
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v19.n19.2011.6_2011.pdf |
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|
| Author (s): |
HUSAIN, Asif; AHMAD, Aftab; BHANDARI, Anil; RAM, Veerma
|
| Title: |
ANTITUBERCULAR ACTIVITY OF SOME NEWER 6-PYRIDAZINONE DERIVATIVES |
| Abstract: |
Two series of 6-pyridazinone derivatives (17-30) were synthesized and evaluated for antitubercular activities against Mycobacterium tuberculosis H37Rv strain. The results indicated that among the synthesized compounds, 5-( 4-hydroxy-3-methoxybenzyl}-3-phenyl-1,6-dihydro-6-pyridazinone (23) showed good antitubercular activity. Three more compounds, (18, 25 & 27) were significant in their antitubercular action. The present study reveals the antitubercular potential of 6-pyridazinones.
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| Keywords: |
Pyridazinone, antitubercular, mycobacteria, furanone.
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| Year: |
2011
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| Initial page: |
17
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| Final page: |
23
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v19.n19.2011.22_2011.pdf |
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|
| Author (s): |
DALLONI, Hany M. M.
|
| Title: |
REACTION OF NITRILIMINES WITH SUBSTITUTED HYDRAZINES: SYNTHESIS OF 1,2,4,5-TETRAAZA-3-PENTENES AND FORMAZANS |
| Abstract: |
A series of 1,2, 4, 5-tetraaza-3-pentenes 4a-j were synthesized by the reaction of appropriate nitrilimines 2 with substituted hydrazines (H2NNHCOR, R=Ph, OMe) 3. Heating the compounds 4a-j with activated charcoal in refluxing benzene oxidized to formazans 5a-j and some formazans 5fj (R = OMe) gave s-tetrazinones 6fj in presence of lithium hydride. The microanalysis and spectral data of the synthesized compounds are in fall agreement with their molecular structure.
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| Keywords: |
Nitrilimines, 1,2,4,5-tetraaza-3-pentenes, formazans, s-tetrazinones.
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| Year: |
2011
|
| Initial page: |
25
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| Final page: |
33
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v19.n19.2011.29_2011.pdf |
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|
| Author (s): |
SRILALITHA, Vinnakota; PRASAD, Aluru Raghavendra Guru; KUMAR, Kakarla Raman; SESHAGIRI, Vahi; RAVINDRANATH, Laxmana Rao Krishna Rao
|
| Title: |
SYNTHESIS AND CHARACTERIZATION OF Mn(II), Ni(II), Fe(III), Co(III), Cu(II), Zn(II) AND Cd(II) COMPLEXES OF o-HYDROXYBENZOIC ACID HYDRAZIDE |
| Abstract: |
A series of complexes of o-Hydroxybenzoic acid hydrazide (HBH) with Mn(II), Ni(II), Fe(III), Co(III), Cu(II), Zn(II), and Cd(II) were synthesized The stoichiometry and structures for the complexes have been established by elemental analysis, electrical conductivity measurements, magnetic moment measurements, and spectral (UV-Vis, IR, and NMR) studies.
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| Keywords: |
Metal complexes, hydroxybenzoic acid hydrazide ligand, characterization, stoichiometry and geometry.
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| Year: |
2011
|
| Initial page: |
35
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| Final page: |
58
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v19.n19.2011.38_2011.pdf |
|
|
| Author (s): |
IONESCU, Lavinel G.
|
| Title: |
ARTHUR F. F.ISHKIN, PROMINENT BIOCHEMIST AND EDUCATOR |
| Abstract: |
Arthur Frederic Fishkin was born on May 27, 1930, in New York City, USA, and passed away peacefully in his sleep in Omaha, Nebraska on his 80th birthday, on May 27, 2010. He attended elementary and secondary school in New York, obtained a B.A. in Zoology from Indiana University in 1951 and an M.A. in 1953. He was awarded the Ph.D. Degree in Biochemistry from the University of Iowa in 1957. He held faculty positions at Louisiana State University, New Mexico State University, and Creighton University. His research activities dealt with enzymes and glycoproteins in connective tissues. He contributed to the training of thousands of students in the medical sciences for almost half a century.
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| Keywords: |
History of chemistry and biochemistry, glycoproteins in blood vessels, enzymes, medical education.
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| Year: |
2011
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| Initial page: |
59
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| Final page: |
78
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v19.n19.2011.62_2011.pdf |
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|
| Author (s): |
IONESCU, L. G.
|
| Title: |
SELECTED PROTEOLYTIC ACTIVITY BY EXTRACTS OF DERMESTID LARVAE |
| Abstract: |
The larvae of the Beetle Dermestes maculatus De Geer can subsist on a diet consisting largely of protein. Studies have been undertaken to investigate the nature of the proteolytic enzymes. A water extract of the larvae yielded a crude preparation which hydrolyzes gelatin, bide powder, hemoglobin substrate, benzoyl-DL-arginine p-nitroamilide, and glutaryl-L-phenylalanine p-nitroanilide. Enzyme activity was found in a non-dialyzable, heat- and acid0labile portion of the extract yielded two fractions with high specific activity towards gelatin. These are precipitated between 40% to 60% saturation of ammonium sulfate and 60% to 80% saturation. The higher specific activity was observed in the 40%-60% fraction. These results suggest that the larvae of these dermestids contain proteolytic enzymes with actions similar to mammalian trypsin and chymoytipsin. The results also suggest that other proteolytic enzymes may be present as well.
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| Keywords: |
Proteolytic activity, dermestid larvae.
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| Year: |
2011
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| Initial page: |
79
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| Final page: |
83
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v19.n19.2011.82_2011.pdf |
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|
| Author (s): |
IONESCU, Lavinel G.; DAS NEVES, Paulo Cesar Pereira; DE FREITAS Dareson Vieira de Freitas
|
| Title: |
MINERALOGICAL ASPECTS OF ARSENIC -THE ARSENATE MINERALS |
| Abstract: |
Arsenic is an element known since ancient times. It is the 52nd element in order of chemical abundance in the Earth s crust with 1.8 ppm (grams per metric ton). Arsenic combines relatively easy with chlorine sulfur, oxygen, and many metals. This article describes some of the uses and properties of arsenic and arsenic compounds and presents a synopsis of the two hundred and seventy-eight (278) arsenate minerals known at the present time.
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| Keywords: |
Arsenic, mineralogical aspects, arsenates, uses of arsenic.
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| Year: |
2011
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| Initial page: |
85
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| Final page: |
106
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| Link: |
Acessar |
| DOI: |
10.48141/SBJCHEM.v19.n19.2011.87_2011.pdf |
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