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Articles by Kamil COSKUNCELEBI
Total Records ( 5 ) for Kamil COSKUNCELEBI
  Nurettin Yayli , Ahmet Yasar , Nuran Yayli , Canan Albay , Yaprak Asamaz , Kamil Coskuncelebi and Sengul Karaoglu
  The chemical components and antimicrobial activity of the essential oils from Centaurea appendicigera C. Koch and Centaurea helenioides Boiss, two different endemic members of the genus Centaurea L. (Asteraceae), were studied. The essential oils of air-dried C. appendicigera and C. helenioides were obtained by hydrodistillation in a Clevenger-type apparatus and analyzed by GC-MS. Forty-five and fifty-one components were identified in the essential oils of C. appendicigera and C. helenioides, respectively, and the main components of these taxa were found to be β-caryophyllene (17.5%) from C. appendicigera and caryophyllene oxide (18.2%) from C. helenioides. The antimicrobial activity of the isolated essential oil of the plants was also investigated, and demonstrated moderate antibacterial activity against Gram-positive, Gram-negative bacteria, and yeast-like fungi.
  Nurettin Yaylı , Ahmet Yasar , Nagihan Yılmaz İskender , Nuran Yaylı , Tayyibe Beyza Cansu , Kamil Coskuncelebi and Sengul Karaoglu
  Chemical compositions of the essential oil of Sedum pallidum Bieb. var. bithynicum (Boiss.) and S. spurium Bieb. (Crassulaceae) from Turkey were investigated by GC-MS, and antimicrobial activity of the oil samples were assessed against Gram-positive/negative bacteria and yeast-like fungi. Thirty-eight and thirty-five components were identified in the essential oils and the main components of these species were found to be caryophyllene oxide from S. pallidum var. bithynicum and hexahydrofarnesyl acetone from S. spurium in the ratios of 12.8% and 15.7%, respectively. The isolated essential oils of the plants showed low antimicrobial activity against Gram-negative/positive bacteria and yeast-like fungi, having the MIC values of 500-2000 μg/mL. Antibacterial activity was not observed against Bacillus cereus.
  Paris quadrifolia L. (Liliaceae) was collected from Northeast Anatolia (A9 Ardahan). It is reported for the first time from Turkey. Line drawings, diagnostic characters and a distribution map of Paris L. species of Turkey are presented.
  Twenty-three populations belonging to 10 wild Primula L. (Primulaceae) taxa of Turkey, some of which are morphologically quite similar, were investigated based on nrDNA ITS regions. The plant materials were collected from different geographical areas of Anatolia in vegetation periods of 2005 and 2006. Total genomic DNAs were isolated from the healthy leaves of each population. The entire ITS regions of the populations were amplified by universal primers with the aid of a polymerase chain reaction (PCR), and then the PCR products were sequenced. Neighbour-Joining (NJ) and Maximum Parsimony (MP) trees were constructed in order to identify the relationships among Primula taxa. According to ITS data, 724 characters were determined among the aligned sequences of the populations and the divergence values were found to be between 0.0% and 20.9%. ITS sequences from 23 specimens provided a number of variable and sufficient characters to explore the relationships. As a result, it was determined that the dendrograms obtained by NJ and MP analysis are concordant with the traditional taxonomical order at subgeneric level.
  Pollen morphology of the 13 taxa of Scorzonera L. (Asteraceae) from Turkey was investigated by using light (LM) and scanning electron microscopy (SEM). As a result of LM and SEM observations, it was found that the pollen types are generally isopolar, radially symmetric, triangular in polar view, and lophate, with lophae ornamentations that are echinate-perforate and an exine thickness ranging from 6.99 to 11.82 μm. The present study found that the lacunae ornamentation of S. laciniata subsp. laciniata and S. tomentosa is perforate-microrugulate, that of S. suberosa and S. cinerea is perforate-microreticulate, that of S. pseudolanata is perforate-psilate, and that of the others is perforate. Prolate-spheroidal pollen shapes were observed in S. insica, and oblate-spheroidal shapes were observed in the rest of the examined taxa, e.g. S. tomentosa, S. pseudolanata, and S. sericea. Spine length ranged between 1.3 and 4.63 μm among the examined taxa. S. tomentosa (4.63 μm) showed the highest value. S. insica (1.3 μm) showed the lowest value. PCA analysis based on the 16 palynological traits showed that polar axis, equatorial diameter, pollen diameter, colpus length, colpus width, and exine and spine length were the most important characters in explaining total variation among the examined taxa. The results also indicated that pollen characters would be useful in separating the examined taxa.
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