Ara
Toplam kayıt 68, 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 ...
Improvement of superconducting properties of MgB2 by changing the argon ambient pressure and sintering conditions
(Institute of Physics Publishing, 2009)
We have investigated various characteristic properties depending on sintering conditions of MgB2 samples prepared by the standard solid state reaction method. It is inferred from experimental results that the crystallinity ...
Age, growth, sexual maturity and food composition of Sciaena umbra in the south-eastern Black Sea, Turkey
(Wiley-Blackwell Publishing, 2009)
Studied were the age, growth, maturity and food composition of the brown meager, Sciaena umbra, caught off Trabzon, south-eastern Black Sea (Turkey) in 2002-2003. A total of 329 individuals was collected by spear fishing ...
Haptic's suitability to constructivist learning environment: aspects of teachers and teacher candidates
(Elsevier Science BV., 2009)
Until today many technologies are used in constructivist learning environments. As for this study, it is tried to reveal haptic's suitability to constructivist education environments together with aspects of 6 teachers and ...
Usability of testing apparatuses about renewable energy resources in constructivist class environment
(Elsevier Science BV., 2009)
Students construct their own knowledge based on their experiences which take part in the basis of constructivism. For that reason, curriculums which are prepared according to constructivist approach should contain activities ...
Intrathoracic pneumatosis cystoides intestinalis associated with Bochdalek hernia and lung hypoplasia
(Oxford Univercity Press, 2009)
[No abstract available]
Trace element content in marine algae species from the Black Sea, Turkey
(Springer, 2009)
Trace element content of marine algae species collected from the Black Sea coasts were determined by atomic absorption spectroscopy after microwave digestion. Trace element content in marine algae species were 1.70-17.1 ...
Variation of K X-ray fluorescence cross-sections of Cu, Y and Ba in Y Ba2Cu3O7-δ superconductor
(Elsevier, 2009)
K X-ray fluorescence cross-sections of Cu, Y and Ba elements were measured in CuO, Y 2O3, BaCO3 compounds and Y Ba2Cu3O7-? superconductor samples (nonreacted agent, calcined and sintered states). A superconductor sample ...
The Benthic exotic species of the Black Sea: Blood cockle (Anadara inaequivalvis, Bruguiere, 1789: Bivalve) and Rapa whelk (Rapana thomasiana, Crosse, 1861: Mollusc)
(2009)
The Black Sea is in transition from a freshwater to a marine environment and has a very low biodiversity. Therefore, it appears to be particularly vulnerable and easy target for many exotic species. Anthropogenic introductions ...