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Toplam kayıt 16, listelenen: 1-10
Synthesis, characterization and cyclization reactions of some new bisthiosemicarbazones
(Arkat, 2009)
The reaction of trans-1, 4-dichloro-2-butene 1 with selected phenols affords (E)-1, 4-bis(aryloxy)-2-butenes 2a-d which are converted into bis-thiosemicarbazones 3a-h via the reactions with thiosemicarbazide and 4-methyl ...
Chemical composition and antimicrobial activity of essential oils from Centaurea appendicigera and Centaurea helenioides
(Taylor & Francis LTD., 2009)
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 ...
Phylogeny of neurergus crocatus and neurergus strauchii in Turkey based on morphological and molecular data
(2009)
We described the phylogeny of the salamandrid genus Neurergus in Turkey using statistical analyses on morphometric characters and a molecular analysis based on 12S and 16S rRNA genes. Two different species, Neurergus ...
Synthesis of some new 1,2,4-triazoles, their Mannich and Schiff bases and evaluation of their antimicrobial activities
(Elsevier, 2009)
4-Phenyl-5-pyridin-4-yl-4H-1,2,4-triazole-3-thiol (3) was obtained in basic media via the formation of 2-isonicotinoyl-N-phenylhydrazinecarbothioamide (2), and converted to some alkylated derivatives (4a,b) and Mannich ...
Photosystem II functionality and antioxidant system changes during leaf rolling in post-stress emerging ctenanthe setosa exposed to drought
(2009)
We studied the changes in antioxidant system and chlorophyll fluorescence parameters in post-stress emerging Ctenanthe setosa (Rosc.) Eichler (Marantaceae) plants (PSE plants) having reduced leaf area under drought stress ...
Sulphur and some heavy metal contents in foliage of Corylus avellana and some roadside native plants in Ordu province, Turkey
(Ekoloji, 2009)
The concentration of sulphur and some heavy metals the leaves of Corylus avellana, Alopecurus myosuroides, Helleborus orientalis, Glechoma hederacea, Calamintha nepeta and Urtica dioica were determined around the "polluted ...
Effects of sexual reproduction on growth and vegetative propagation in Arum Maculatum L. (Araceae): Insitu removal experiments
(2009)
We investigated the effects of sexual reproduction on vegetative propagation and relative somatic cost in Arum maculatum L. (Araceae). Two groups were selected as control and experimental. The spadices of individuals in ...
The relationship between leaf rolling and ascorbate-glutathione cycle enzymes in apoplastic and symplastic areas of Ctenanthe setosa subjected to drought stress
(2009)
The ascorbate-glutathione (ASC-GSH) cycle has an important role in defensive processes against oxidative damage generated by drought stress. In this study, the changes that take place in apoplastic and symplastic ASC-GSH ...
Synthesis of some new 1,2,4-triazoles starting from isonicotinic acid hydrazide and evaluation of their antimicrobial activities
(Elsevier, 2009)
5-Pyridin-4-yl-1,3,4-oxadiazole-2-thiol (2) was obtained from the reaction of isonicotinic acid hydrazide with carbon disulfide in basic media and converted into 4-amino-5-pyridin-4-yl-4H-1,2,4-triazole-3-thiol (5) by the ...
Synthesis of methyl (E)-2′,4″-thiazachalcones and their N-alkyl derivatives, photochemistry with theoretical calculations and antimicrobial activities
(TUBİTAK, 2009)
A series of 9 new (E) -thiazachalcones (1-3), and their N -alkyl substituted derivatives (4-6), and stereoselective dimerization products (7-9) were synthesized, then tested for antimicrobial activity against all test ...