Alpaslan Kocak - Academia.edu (original) (raw)

Papers by Alpaslan Kocak

The essential oil composition leaves of Juniperus communis L., Taxus canadensis Marshall. and Tsu... more The essential oil composition leaves of Juniperus communis L., Taxus canadensis Marshall. and Tsuga canadensis (L.) Carr. from Canada were investigated by head space solid phase microextraction (HS-SPME) and gas chromatography/mass spectrometry (GC-MS). Thirty-three, thirty and thirty-one components were identified representing 95.78%, 93.89%, 96.14% of the oil, respectively. Limonene (26.12%), benzene (15.62%), -mrycene (9.08%) and -pinene (7.30%) were found to be the main constituents of J. communis; 1-propanone (36.38%), morpholine (10.95%), methylamine (9.10%) and methanone (8.14%) were detected main components of Taxus canadensis; bornylacetate (26.84%), -pinene (23.74%), camphene (11.93%) and limonene (6.02%) were determined as major constituents of Tsuga canadensis. The chemical distributions of the essential oil compounds in the genus pattern were discussed in means of chemotaxonomy and natural products.

Journal of Essential Oil Bearing Plants, 2008

The chemical composition of the essential oils of dried aerial parts of Tanacetum balsamita subsp... more The chemical composition of the essential oils of dried aerial parts of Tanacetum balsamita subsp. balsamita and T. chiliophyllum var. chiliophyllum were analyzed by GC and GC-MS. Forty five and forty six components were identified representing 81.0 % and 84.4 % of the oils, respectively. Trans-chrysanthenol (22.3 %), chrysanthenyl acetate (19.7 %), linalool oxide (11.5 %), camphor (7.5 %), 1,8-cineole (2.7 %) were found to be major components in T. balsamita subsp. balsamita and camphor (28.5 %), 1,8-cineole (17.1 %), camphene (7.1 %), isobornyl propionate (5.4 %), carveol (4.5 %) and borneol (3.5 %) were also found as major constituents in T. chiliophyllum var. chiliophyllum. In vitro antimicrobial activities of these oils and two antibiotics against Gram-positive and Gram-negative bacteria and two yeasts were also investigated. The results exhibited that the total oils and antibiotics possess moderate activities against all the tested microorganisms.

Natural Product Research, 2016

Journal of Essential Oil Bearing Plants, 2011

Abstract In this study, essential oil composition of local endemic Salvia kronenburgii Rech. fil.... more Abstract In this study, essential oil composition of local endemic Salvia kronenburgii Rech. fil. to Turkey were determined. The aerial parts of Salvia kronenburgii Rech. fil were hydro-distilled to produce the oil in the yields of 0.7 v/w. The chemical composition of the essential oil of dried aerial parts of S. kronenburgii was analyzed by GC and GC-MS. Fifty four components were identified representing 87.08 % of the oil. Limonene (11.77 %), 2-cyclohexen-1-ol (9.25 %), trans-verbenol (7.70 %) and trans-(+)-carveol (6.77 %) were found to be major components in S. kronenburgii. The distribution of the essential oil constituents was discussed in Salvia genus patterns.

The seed stocks in soil of rangelands community was studied in order to provide a basis for a bet... more The seed stocks in soil of rangelands community was studied in order to provide a basis for a better understanding of the background of botanical composition. Soil seed stocks changed depending on management strategies efforts and some environmental factors in rangeland sites. Knowledge about soil seed banks and vegetation in these ecosystems was crucial for guiding the restoration efforts. This

Journal of Essential Oil Bearing Plants, 2008

ABSTRACT The chemical composition of the essential oils of dried aerial parts of Tanacetum balsam... more ABSTRACT The chemical composition of the essential oils of dried aerial parts of Tanacetum balsamita subsp. balsamita and T. chiliophyllum var. chiliophyllum were analyzed by GC and GC-MS. Forty five and forty six components were identified representing 81.0 % and 84.4 % of the oils, respectively. Trans-chrysanthenol (22.3 %), chrysanthenyl acetate (19.7 %), linalool oxide (11.5 %), camphor (7.5 %), 1,8-cineole (2.7 %) were found to be major components in T. balsamita subsp. balsamita and camphor (28.5 %), 1,8-cineole (17.1 %), camphene (7.1 %), isobornyl propionate (5.4 %), carveol (4.5 %) and borneol (3.5 %) were also found as major constituents in T. chiliophyllum var. chiliophyllum. In vitro antimicrobial activities of these oils and two antibiotics against Gram-positive and Gram-negative bacteria and two yeasts were also investigated. The results exhibited that the total oils and antibiotics possess moderate activities against all the tested microorganisms.

Zeitschrift für Naturforschung C, 2011

Industrial Crops and Products, 2010

Asian Journal of Animal and Veterinary Advances, 2011

Tanacetum is an important member of the Asteraceae family and considered the most problematic gen... more Tanacetum is an important member of the Asteraceae family and considered the most problematic genus and the phylogenetic position of some taxa is of great interest because of the high morphologic diversity and taxonomical complexity. Molecular phylogeny and systematic status of some Tanacetum taxa from Turkey has been carried out. T. heterotomum (endemic), T. cadmeum subsp. orientale (endemic), T. cappadocicum, and T. eginense have not been included in any molecular phylogenetic analysis yet. To determine the phylogenetic relationships and taxonomic status of Tanacetum L. taxa we analysed internal transcribed spacer (ITS) from nuclear ribosomal DNA (nrDNA) and trnL (UAA) intron, intergenic spacer between the trnL (UAA) 3 exon and trnF (GAA) from chloroplast DNA (cpDNA). According to the phylogenetic trees two main clades were formed. First clade included T. eginense, T. cadmeum subsp. orientale and T. cappadocicum, the other clade included T. heterotomum according to the data based ...

Chemistry of Natural Compounds, 2011

The essential oil composition leaves of Juniperus communis L., Taxus canadensis Marshall. and Tsu... more The essential oil composition leaves of Juniperus communis L., Taxus canadensis Marshall. and Tsuga canadensis (L.) Carr. from Canada were investigated by head space solid phase microextraction (HS-SPME) and gas chromatography/mass spectrometry (GC-MS). Thirty-three, thirty and thirty-one components were identified representing 95.78%, 93.89%, 96.14% of the oil, respectively. Limonene (26.12%), benzene (15.62%), -mrycene (9.08%) and -pinene (7.30%) were found to be the main constituents of J. communis; 1-propanone (36.38%), morpholine (10.95%), methylamine (9.10%) and methanone (8.14%) were detected main components of Taxus canadensis; bornylacetate (26.84%), -pinene (23.74%), camphene (11.93%) and limonene (6.02%) were determined as major constituents of Tsuga canadensis. The chemical distributions of the essential oil compounds in the genus pattern were discussed in means of chemotaxonomy and natural products.

Journal of Essential Oil Bearing Plants, 2008

The chemical composition of the essential oils of dried aerial parts of Tanacetum balsamita subsp... more The chemical composition of the essential oils of dried aerial parts of Tanacetum balsamita subsp. balsamita and T. chiliophyllum var. chiliophyllum were analyzed by GC and GC-MS. Forty five and forty six components were identified representing 81.0 % and 84.4 % of the oils, respectively. Trans-chrysanthenol (22.3 %), chrysanthenyl acetate (19.7 %), linalool oxide (11.5 %), camphor (7.5 %), 1,8-cineole (2.7 %) were found to be major components in T. balsamita subsp. balsamita and camphor (28.5 %), 1,8-cineole (17.1 %), camphene (7.1 %), isobornyl propionate (5.4 %), carveol (4.5 %) and borneol (3.5 %) were also found as major constituents in T. chiliophyllum var. chiliophyllum. In vitro antimicrobial activities of these oils and two antibiotics against Gram-positive and Gram-negative bacteria and two yeasts were also investigated. The results exhibited that the total oils and antibiotics possess moderate activities against all the tested microorganisms.

Natural Product Research, 2016

Journal of Essential Oil Bearing Plants, 2011

Abstract In this study, essential oil composition of local endemic Salvia kronenburgii Rech. fil.... more Abstract In this study, essential oil composition of local endemic Salvia kronenburgii Rech. fil. to Turkey were determined. The aerial parts of Salvia kronenburgii Rech. fil were hydro-distilled to produce the oil in the yields of 0.7 v/w. The chemical composition of the essential oil of dried aerial parts of S. kronenburgii was analyzed by GC and GC-MS. Fifty four components were identified representing 87.08 % of the oil. Limonene (11.77 %), 2-cyclohexen-1-ol (9.25 %), trans-verbenol (7.70 %) and trans-(+)-carveol (6.77 %) were found to be major components in S. kronenburgii. The distribution of the essential oil constituents was discussed in Salvia genus patterns.

The seed stocks in soil of rangelands community was studied in order to provide a basis for a bet... more The seed stocks in soil of rangelands community was studied in order to provide a basis for a better understanding of the background of botanical composition. Soil seed stocks changed depending on management strategies efforts and some environmental factors in rangeland sites. Knowledge about soil seed banks and vegetation in these ecosystems was crucial for guiding the restoration efforts. This

Journal of Essential Oil Bearing Plants, 2008

ABSTRACT The chemical composition of the essential oils of dried aerial parts of Tanacetum balsam... more ABSTRACT The chemical composition of the essential oils of dried aerial parts of Tanacetum balsamita subsp. balsamita and T. chiliophyllum var. chiliophyllum were analyzed by GC and GC-MS. Forty five and forty six components were identified representing 81.0 % and 84.4 % of the oils, respectively. Trans-chrysanthenol (22.3 %), chrysanthenyl acetate (19.7 %), linalool oxide (11.5 %), camphor (7.5 %), 1,8-cineole (2.7 %) were found to be major components in T. balsamita subsp. balsamita and camphor (28.5 %), 1,8-cineole (17.1 %), camphene (7.1 %), isobornyl propionate (5.4 %), carveol (4.5 %) and borneol (3.5 %) were also found as major constituents in T. chiliophyllum var. chiliophyllum. In vitro antimicrobial activities of these oils and two antibiotics against Gram-positive and Gram-negative bacteria and two yeasts were also investigated. The results exhibited that the total oils and antibiotics possess moderate activities against all the tested microorganisms.

Zeitschrift für Naturforschung C, 2011

Industrial Crops and Products, 2010

Asian Journal of Animal and Veterinary Advances, 2011

Tanacetum is an important member of the Asteraceae family and considered the most problematic gen... more Tanacetum is an important member of the Asteraceae family and considered the most problematic genus and the phylogenetic position of some taxa is of great interest because of the high morphologic diversity and taxonomical complexity. Molecular phylogeny and systematic status of some Tanacetum taxa from Turkey has been carried out. T. heterotomum (endemic), T. cadmeum subsp. orientale (endemic), T. cappadocicum, and T. eginense have not been included in any molecular phylogenetic analysis yet. To determine the phylogenetic relationships and taxonomic status of Tanacetum L. taxa we analysed internal transcribed spacer (ITS) from nuclear ribosomal DNA (nrDNA) and trnL (UAA) intron, intergenic spacer between the trnL (UAA) 3 exon and trnF (GAA) from chloroplast DNA (cpDNA). According to the phylogenetic trees two main clades were formed. First clade included T. eginense, T. cadmeum subsp. orientale and T. cappadocicum, the other clade included T. heterotomum according to the data based ...

Chemistry of Natural Compounds, 2011