Browsing by Publisher "Scientific and Technical Research Council of Turkey"

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    The effect of activator application on the anatomy, morphology, and viability of Lycopersicon esculentum Mill. pollen; [Aktivatör uygulamasının Lycopersicon esculentum Mill. poleninin anatomisi, morfolojisi ve canlılıǧı üzerine etkileri]
    (Scientific and Technical Research Council of Turkey, 2010) Öztürk Çali I.; Candan F.
    The present study examined the effect of ACT-2, a K-vitamin group activator intensively applied to tomato (Lycopersicon esculentum Mill.), on the anatomy, morphology, and viability of tomato pollen from plants grown under greenhouse conditions. The activator was applied to tomatoes at the recommended dosage (150 cc/100 L of tap water) and double the recommended dosage (300 cc/100 L of tap water). Pollen width and length, exine and intine layer thickness, pore width and length, and crevice width and length were measured using an ocular micrometer. Reductions were observed in all the measured parameters in all application groups, except for pollen width and length values at the 150 cc/100 L dosage, as compared to the control group. The viability of the pollen, as determined by triphenyl tetrazolium chloride, decreased in all the application groups as the dosage increased, as compared to the control group, and the toxic effect became more evident at the 300 cc/100 L dosage. In particular, non-viable pollen types, such as wrinkled pollen and abnormally shaped pollen, were observed in the fungicide groups. Additionally, the activator caused changes in the morphological structure of the tomato pollen. The morphological structures of some pollen, such as subprolate and suboblate, which were not observed in the control group, were seen in pollen in the polar view at the 150 cc/100 L ACT-2 dosage. © TÜBİTAK.
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    Comparison of the osteogenic differentiation capacity of adipose tissue derived mesenchymal stem cells from humans and rats
    (Scientific and Technical Research Council of Turkey, 2016) Erden Tayhan S.; Taşdemir Ş.; Deliloğlu Gürhan S.İ.; Mir E.
    Mesenchymal stem cells (MSCs) can be found in many types of adult tissues such as the bone marrow, adipose, placenta, liver, and periosteum. Recently, adipose tissue-derived MSCs (ADMSCs) have become one the most preferred MSC types because of their fast proliferation rate, abundance, and high plasticity for variable cell types. It is known that ADMSCs are able to differentiate into various cells, including osteoblasts, so they are quite promising for orthopedic clinical trials. The present study aimed to compare the osteogenic differentiation conditions of MSCs from human adipose tissue (hADMSC) and those of MSCs from rat adipose tissue (rADMSC). Therefore, differentiation experiments with five different media and two (human and rat) ADMSC types were performed and the mineralization responses of hADMSCs and rADMSCs were different. © TÜBİTAK.