Thermoluminescence properties of fluorescent materials used in commercial lamps

The dosimetric properties of eight different fluorescent materials (FM) used in production of commercial fluorescent lamps were studied by thermoluminescence (TL). Taking into account the criteria for TL phosphors to be useful for radiation dosimetry, radiation sensitivity, thermal stability, shape of the glow curves, and effect of incandescence, UV and daylight on irradiated and non irradiated material were investigated. It was observed that most of the material can be used for radiation doses from 10 mu Gy to 1 kGy. The radiation induced signal is found to be thermally very stable. The calcium halophosphates doped with Sb and Sb:Mn having a similar mineral phase as teeth and bone may be used for dosimetry in radiation therapy and diagnostics. The strontium borophosphates and barium magnesium aluminate doped with Eu were found to be sensitive to light and may be used in solar energy research

ESR AND TL AGE-DETERMINATION OF CALICHE NODULES

Feasibility of dating caliche nodules by ESR and TL is investigated. For both methods the properties of the dating signal are described. Chemical composition as well as TL glow curves of caliches originating from different localities exhibit some differences. Due to the complexity of the TL glow curves, some samples required a special post-annealing procedure in order to resolve the main TL peak for age determination. Typical ESR calcite signals do not exist in caliche, therefore usefulness of the g = 2.0040 ESR signal is studied. The results of TL and ESR ages are found to be compatible except for two samples. Possible causes of the discrepancy in these samples are discussed. It is shown that, with proper treatment of the radiation-induced signals, it was possible to date caliche formations older than 350 ka, which is not achieveable with other methods like uranium series disequilibrium and/or radiocarbon dating

Committee of the Turkish Oncology Group (TOG)

Objective Fear of cancer recurrence (FCR) is an important psychological trauma associated with reduction in the quality of life, disruptions in the level of adjustment, emotional distress and anxiety. The purpose of the study was to evaluate the impact of patient-physician relationship on FCR. Methods The study was designed as a multicentre survey study. The cancer survivors, who were under remission, were evaluated with structured questionnaires. Patient-physician relationship (PPR) scale in which higher scores indicate better relationship and FCR inventory was used. Results Between January and April 2019, 1,580 patients were evaluated. The median age was 57.0 (19-88), and 66% were female. There was high level of FCR scores in 51% of participants. There was a negative correlation between PPR and FCR scores (r = -.134,p < .001). In multivariate analysis, young age, female gender, history of metastasectomy and worse PPR were associated with high levels of FCR. Conclusion It is the first data showing the adverse impact of worse PPR on FCR. The strategies to improve the PPR should be practised. In addition, the cancer survivors, who are under the risk of FCR, should be evaluated and managed.C1 [Alkan, Ali; Tanriverdi, Ozgur] Mugla Sitki Kocman Univ, Sch Med, Med Oncol, Mugla, Turkey.[Yasar, Arzu; Gurbuz, Mustafa; Senler, Filiz Cay] Ankara Univ, Med Oncol, Sch Med, Ankara, Turkey.[Guc, Zeynep Gulsum; Yavuzsen, Tugba] Dokuz Eylul Univ, Sch Med, Med Oncol, Izmir, Turkey.[Basoglu, Tugba; Yumuk, Perran Fulden] Marmara Univ, Sch Med, Med Oncol, Istanbul, Turkey.[Goksu, Sema Sezgin; Coskun, Hasan Senol] Akdeniz Univ, Med Oncol, Sch Med, Antalya, Turkey.[Basal, Fatma Bugdayci; Ates, Ozturk] Abdurrahman Yurtarslan Res & Training Hosp, Med Oncol, Ankara, Turkey.[Turk, Haci Mehmet] Bezmialem Univ, Sch Med, Med Oncol, Istanbul, Turkey.[Ozdemir, Ozlem] Izmir Bozyak Res & Training Hosp, Med Oncol, Izmir, Turkey.[Cinkir, Havva Yesil] Gaziantep Univ, Sch Med, Med Oncol, Gaziantep, Turkey.[Guven, Deniz Can] Hacettepe Univ, Med Oncol, Sch Med, Ankara, Turkey.[Kus, Tulay] Dr Ersin Arslan Training & Res Hosp, Med Oncol, Gaziantep, Turkey.[Turker, Sema] Diskapi Yildirim Beyazit Res & Training Hosp, Med Oncol, Ankara, Turkey.[Koral, Lokman] Canakkale Onsekiz Mart Univ, Sch Med, Med Oncol, Canakkale, Turkey.[Karakas, Yusuf] Bodrum Acibadem Hosp, Med Oncol, Mugla, Turkey.[Ak, Naziye] Istanbul Univ, Sch Med, Med Oncol, Istanbul, Turkey.[Paydas, Semra] Cukurova Univ, Med Oncol, Sch Med, Adana, Turkey.[Karci, Ebru] Bagcilar Res & Training Hosp, Med Oncol, Istanbul, Turkey.[Demiray, Atike Gokcen] Pamukkale Univ, Med Oncol, Sch Med, Denizli, Turkey.[Demir, Atakan] Acibadem Maslak Hosp, Med Oncol, Istanbul, Turkey.[Alan, Ozkan] Tekirdag Publ Hosp, Med Oncol, Tekirdag, Turkey.[Keskin, Ozge] Selcuk Univ, Sch Med, Med Oncol, Konya, Turkey.[Nayir, Erdinc] VM Med Pk Mersin Hosp, Med Oncol, Mersin, Turkey.[Turhal, Serdar] Anadolu Med Ctr, Med Oncol, Kocaeli, Turkey