Yazar "Ozdemir, Elif" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Öğe
    The effect of Ag, ZnO, and CuO nanoparticles on the properties of the compatibilized polyethylene/thermoplastic starch blend films
    (Wiley, 2021) Ozdemir, Elif; Ucar, Ikrime Orkan; Akay, Ramiz Gultekin; Aytac, Ayse
    In this study, the effects of Ag, ZnO, and CuO nanoparticles (NPs) on the mechanical, thermal, and biodegradability properties of the compatibilized polyethylene (PE)/thermoplastic starch (TPS) blends were investigated. Polyethylene-grafted maleic anhydride (PE-g-MA) was used as the compatibilizer. The compatibilized PE/TPS blends with different NPs were prepared by melt mixing method in a laboratory scale extruder and then pressurized in the press machine. The use of ZnO NP together with the compatibilizer in PE/TPS-based films significantly increased the tensile stress values. The use of different type NPs did not cause any significant change in the thermal stability of PE/TPS-based films. However, the effects of NPs were observed on the TPS degradation steps. The prepared films with different NPs showed an antibacterial activity between 60% and 70%. The highest crystallinity value was obtained in Ag NP containing films, among others. According to scanning electron microscopy analysis, better distribution was observed for ZnO and Ag NPs than CuO NP. In general, it can be said that the addition of NPs to PE/TPS-based blends significantly reduces the partial biodegradability of the resulting films.
  • Küçük Resim Yok
    Öğe
    The Relationship Between Frailty and Psychosocial Adjustment in Older Adults with COPD
    (Galenos Publ House, 2025) Kaymaz, Tugce Turten; Ozdemir, Elif; Demiroz, Hanife Efsane; Ayar, Merve Celik
    Objective: Frailty in older adults can manifest through various symptoms; reduced oxygen capacity is one of its prominent indicators. As individuals age, the prevalence of chronic obstructive pulmonary disease (COPD), a condition characterized by diminished oxygenation, also tends to increase. COPD and frailty can cause psychosocial adjustment difficulties. The study investigated the relationship between frailty and psychosocial adjustment in older adults with COPD. Materials and Methods: This descriptive-correlational study was conducted with 137 older patients who met the inclusion criteria. Data were collected using a patient identification form, the Psychosocial Adjustment to Illness Scale-self report (PAIS-SR), and the Edmonton Frail Scale (EFS). Results: Participants had a mean PAIS-SR score of 54.37 +/- 12.91. They had a mean EFS score of 6.79 +/- 3.83. Age and COPD stage affected their median PAIS-SR scores (p<0.05). Age, education, occupation, and hospitalization also affected their EFS scores (p<0.05). There is a negative correlation between frailty and psychosocial adjustment. Moreover, the COPD stage and frailty are associated with psychosocial adjustment. Conclusion: The frailer the older COPD patients are, the lower their psychosocial adjustment. Poor psychosocial adjustment is associated with COPD stages and frailty. Age, education, hospitalization, and psychosocial adjustment are predictors of frailty. Older COPD patients with low education levels, advanced disease stages, and frequent hospitalizations should be assessed for frailty and psychosocial adaptation. Evaluating patients may help us detect frail patients with low adaptation levels. In that way, we can meet patients' monitoring and care needs in the early period.