Ratiu
Ileana
Ratiu
Ileana
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ArticleRadiocarbon dating of a very old African baobab from Savé Valley, Zimbabwe(Studia Chemia, 2016) Patrut, Adrian ; Rakosy, Laszlo ; Patrut, Roxana T. ; Ratiu, Ileana ; Forizs, Edit ; Lowy, Daniel A. ; Margineanu, Dragos ; von Reden, Karl F.The article reports the radiocarbon investigation results of the Humani Bedford baobab, an old African baobab from Savé Valley, Zimbabwe. Two wood samples were collected from the large inner cavity. Several segments were extracted from these samples and analysed by AMS (accelerator mass spectrometry) radiocarbon dating. We found that the age values of segments increase with the distance into the wood. This major anomaly is characteristic to multi-stemmed baobabs with a closed ring-shaped structure and a false cavity inside. The investigation of the Humani Bedford baobab evinced that the baobab consists of three fused stems. The fourth stem of the ring is missing. The oldest dated segment was found to have a radiocarbon date of 1655 ± 14 BP, which corresponds to a calibrated age of 1575 ± 30 yr. The dating results show that the stems which build the ring stopped growing toward the false cavity more than 600 yr ago. By considering the position of the oldest segment in the investigated stem, we concluded that the Humani Bedford baobab is around 1800 yr old. According to our dating results, the Humani Bedford baobab becomes the oldest living African baobab.
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ArticleFinal radiocarbon investigation of Platland tree, the biggest African baobab(Studia Chemia, 2017) Patrut, Adrian ; Woodborne, Stephan ; Patrut, Roxana T. ; Rakosy, Laszlo ; Hall, Grant ; Ratiu, Ileana ; von Reden, Karl F.The article discloses the main results of our new investigation of Platland tree, a.k.a. Sunland baobab, the largest known African baobab. Our recent research was motivated by the three successive splits of 2016 and 2017, which determined the collapse and demise of the stems that have built the main unit of the tree. According to our new findings concerning the architecture of large and old baobabs, we established that Platland tree has a double closed-ring shaped structure and consists of two units/rings that close two separate false cavities. The larger unit was composed of five fused stems, out of which four toppled and died, while the fifth stem is already broken. The smaller unit, which is still standing, consists of three fused stems. We also determined that the larger unit had an age of 800 yr, while the smaller unit is 1100 yr old.
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ArticleRadiocarbon dating of the old ash of Aiton, Romania(Studia Universitatis Babes-Bolyai, 2018) Patrut, Adrian ; Patrut, Roxana T. ; Rakosy, Laszlo ; Ratiu, Ileana ; Lowy, Daniel A. ; Bodis, Jeno ; von Reden, Karl F.The article reports the AMS (accelerator mass spectrometry) radiocarbon investigation results of the old common ash of Aiton. Five wood samples were collected from the trunk of the tree. The deepest ends of the samples were analysed by AMS radiocarbon. We found radiocarbon dates between 165 ± 20 BP and 240 ± 18 BP, which correspond to calibrated ages of 230 – 360 years. These results, combined with a ring counting estimate, indicate an age of 330 ± 30 years for the ash of Aiton. By this value, the ash of Aiton becomes the oldest known common ash with accurate dating results.