Maher Helmy Elsayed Helal Chemistry Dept., Faculty of Science, Helwan University, Cairo, Phone: (002)0225565548, Mobile: 0101154456, E-mail: ______________________________ Education .Ph.D., Organic Chemistry, Helwan Universit y 1990-1994 .M. Sc., , Organic Chemistry Helwan Universit y 1983-1990 .B. Sc., Chemistry, Elmnofia University 1982 ______________________________________________________________ Areas of Specialization - Design and application of industrial dyes. - Pretreatment of textile fibers. ______________________________________________________________ Academic Jobs 1984- 1990 Demonstrator of Chemistry, Helwan University. 1990- 1994 Teaching Assistant of Chemistry, Helwan University. 1994- 2004 Lecturer of Chemistry, Helwan University. 2004- 2008 Associate Professor of Chemistry, Helwan University. List of Publications Dr. Maher Helmy Helal A Fast Desizing/Scouring/Bleaching System For Cotton-Based Textiles. S.A. Abdel-Hafiz, F.F. Elsisi, M. Helmy and A. Hebeish American Dyestuff Reporters, 79, 12 (1990). Sodium Chlorite/Potassium Chromate Co-oxidant Induced Concurrent Desizing, Scouring and Bleaching of Cotton / Polyester Blend Fabrics. S.A. Abdel-Hafiz, F.F. Elsisi, M. Helmy and A. Hebeish American Dyestuff Reporters, 80, 3 (1991). Concurrent Grafting and Dyeing Using KMnO4/Citric Acid System Induced Polymerization of Acrylonitrile onto Loomstate Cotton Fabric. S.A. Abdel-Hafiz, F.F. Elsisi, M. Helmy and A. Hebeish American Dyestuff Reporterts, 15, 8 (1994). Potassium Permanganate-Citric Acid System Induced Simultaneous Grafting and Dyeing of Loomstate Cotton Fabric Using Methacrylic Acid and Acid or Basic Dye in This System. S.A. Abdel-Hafiz, F.F. Elsisi, M. Helmy and A. Hebeish American Dyestuff Reporters, 21, 9 (1994). Concurrent Grafting and Dyeing Using Loomstate Cotton Fabric/Acrylamide /KMnO4 -Citric Acid/Dye Water System. S.A. Abdel-Hafiz, F.F. Elsisi, M. Helmy and A. Hebeish American Dyestuff Reporters, 21, 5 (1995). Novel Synthesis of Thiazole Disperse dye Derivatives. Y.M. Elkholy, A.W. Erian and M.H. Helal Pigment and Resin Technology, 30(3), 168-170 (2001). A Novel Synthesis of 1-Oxo-thieno[ 31,21-3,4 ]pyrazolo[1,2-a]pyrazole Azo Dye Systems for Dyeing of Synthetic and Modified Cellulose Fibers H.Z. Shams, M.H. Helal, F.A. Mohamed and S.A. Abdel-Hafiz Pigment and Resin Technology, 30(3), 158-163 (2001). Synthesis of A New Series of Polyfunctionally-Substituted Pyrazole Azo Dye Systems for Dyeing of Synthetic and Modified Cellulose Fibers. H.Z. Shams, M.H. Helal and F.A. Mohamed Pigment and Resin Technology, 30(2), 99-108 (2001). A Novel Synthesis of Polyfunctionally-Substituted Pyrazolo[1,2-a]pyrazole and Thieno[3`,2`-3,4]pyrazolo[1,2-a]pyrazole systems). H.Z. Shams, M.H. Helal and F.A.Mohamed Phosphorous, Sulphur and Silicon, 174, 255-267 (2001). Synthesis of a New Series of Thiazole and Pyrazole Azo Dye Systems for Dyeing of Synthetic Fibers. Maher H. Helal Pigment and Resin Technology, 30(5) 296-300 (2001). 11-- Novel Arylazo Pyrazolo[1,5-a]pyrimidine Derivatives: Synthesis, Properties and Dyeing Characteristics. G.H. Elgmeie, M.H. Helal and H.M. Elsayed Pigment and Resin Technology, 33(1), 91-98 (2004). Synthesis of and Dyeing Characteristics of Novel Pyrazolo[1,5- a]pyrimidine Derivatives Containing Two Arylazo Functions. G.H. Elgmeie, M.H. Helal and H.M. Elsayed Pigment and Resin Technology, 32(2), 100-106 (2003). Synthesis of and Dyeing Properties of A New Class of Condensed Carbocyclic Arylazopyrazolo[1,5-a]-Pyrimidines. G.H. Elgmeie, M.H. Helal and Kawther A. Ahmed Pigment and Resin Technology, 32(1), 10-23 (2003). Novel Pyridine-2(1H)-thione and Thieno-[2,3-b]pyridine Derivatives Containing Arylazo Moiety, Synthesis Characteristics and Dyeing properties. Galal H. Elgmeie, Maher H. Helal, Emam M. Abbas and Ebtsam A. Abd- Elmowlla Pigment and Resin Technology, 31(6), 365-374 (2002). Synthesis and Characterization of A New Series of Pyridinone Azo Dyes for Dyeing of Synthetic Fibers. M.H. Helal Pigment and Resin Technology, 33, 165-171 (2004). Synthesis, structure elucidation and biological evaluation of some fused and /or pendent thiophene, pyrazole, imidazole, thiazole, triazole, triazine and coumarin systems based on cyanoacetic 2-[(benzoyl amino)thiooxomethyl]hydrazide. H.Z. Shams, R.M. Mohareb, M.H. Helal and A.E. Mhmoud. Accepted for publication in Phosphorous, Sulphur and Silicon (2006). Synthesis and dyeing performance of new disperse azo dyes based on oxo pyridine core. H.Z. Shams, R.M. Mohareb, M.H. Helal and E.M. Samir .Accepted for publication in Pigment and Resin Technology (2006).
Synthesis of a new series of polyfunctionally substituted thiazole azo dye systems for dyeing of synthetic fibers, , M.H. Helal, G.H. Elgmeie and D.a.Msaoud, Accepted for publication in pigment and Resin Technology(2007) 19 Novel Benzothiazapine Azo Dyes; Synthesis, Characterization, And Printing Properties G.H. Elgmeie, M.H. Helal and Kawther A. Ahmed, Accepted for publication in pigment and Resin Technology,(2007)
Edwin Winkel DDS PhD Actinobacillus actinomycetemcomitans , Bacteroides gingivalis and Bacteroides intermedius : predictors of attachment loss? Wennström JL, Dahlén G, Svensson Svensson J, Nyman S Oral Microbiol. Immunol 1987: 2:158-163 It appeared that the absence of these “indicator” bacteria is a better predictor of no further loss of atta
Ca stapan de porcusori este extrem de util sa aveti in casa o trusa de prim ajutor pentru ingrijirea Picaturi Beres Drops lor. Sunt cateva materiale ce sunt de dorit sa fie mereu la indemana, in acest fel puteti ajuta Plus: contin minerale si porcusorul in caz de urgenta pana ajungeti la medicul veterinar, totodata aveti posibilitatea de a m i c r o e l e m e n t e , s e intampina unele