Browsing by Author "Sener, A."

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The Evaluation of Exposure To Hepatitis a Virus in Hbsag-Positive Persons: a Multicentre Study From Turkey
(Journal of Pure and Applied Microbiology, 2014) Celen, M.K.; Turker, K.; Oztoprak, N.; Sener, A.; Tuna, N.; Ince, N.; Tabak, F.
Chronic hepatitis B is a major public health problem in our country. Hepatitis A vaccination in HBV carriers who did not encounter with Hepatitis A virus is also significant. We aimed to evaluate the rate of exposure to HAV in HBsAg-positive persons, and the distribution of seronegative individuals according to age groups. Medical records of 4793 patients from 14 centers who were positive for hepatitis B surface antigen (HBsAg). A total 3514 cases (73.3%) were male and 1279 (26.7) were female. The HBsAg positive patients who were previously tested for HAV IgG at the time of firstly admitted to a center. HBsAg positive patients who were previously not tested for HAV IgG were tested and these . patients were confirmed serologically for HAV. The distribution of cases according to age were determined. In this study, 4793 HBsAg-positive patients were evaluated. The ratio of testing of anti-HAV IgG was very low during the first visit (54.2%). Seronegativity was highest in the age group under 19 years of age (26.2%) followed by 20-25 age group (15.5%) and 26-29 age group (12.5%). Testing of HAV serology should not be ignored in especially HBsAg-positive young adults and seronegative young adults should be vaccinated.
Studies on Reactions of Cyclic Oxalyl Compounds With Hydrazines or Hydrazones. 2. Synthesis and Reactions of 4-Benzoyl 1h-Pyrazole Acid
(2004) Sener, A.; Kasimogullari, R.; Sener, M.K.; Genc, H.
4-Benzoyl-1-(4-nitrophenyl)-5-phenyl-1H-pyrazole-3-carboxylic acid, obtained from the corresponding furan-2,3-dione and N-benzylidene-N'-(4- nitrophenyl)hydrazine, was converted via reactions of its acid chloride with various alcohols or N-nucleophiles into the corresponding ester or amide derivatives. The nitrile of the starting acid and 1-(4-aminophenyl)-4-benzoyl-5- phenyl-1H-pyrazole-3-carboxylic acid were also obtained. While cyclocondensation reactions of the two acids and the nitrile mentioned with hydrazines lead to pyrazolo[3,4-d]pyridazine derivatives, the reaction of starting acid with 2-hydrazinopyridine provided the hydrazonopyrazole acid derivative.
Synthesis and Antibacterial Activity of 4-Benzoyl Pyrazole-3 Acid and Derivatives
(2005) Akbas, E.; Berber, I.; Sener, A.; Hasanov, B.
Some new 1H-pyrazole-3-carboxylic acid and pyridazinone derivatives were synthesized and evaluated for their antibacterial activities against Bacillus cereus ATCC 7064, Staphylococcus aureus ATCC 6538, Escherichia coli ATCC 4230 and Pseudomonas putida using tube dilution method. The minimal inhibitory concentrations (MICs) experiments revealed that all chemical compounds showed inhibitor effects on the growth of the test microorganisms. Moreover, the results of this research showed that the compound named as 5c was the best compound in the series, exhibiting antibacterial activity against both Gram-positive and Gram-negative bacteria. © 2004 Published by Elsevier SAS.