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    Chemosensory Pleasure Scale: Validity and Reliability of Turkish Version
    (Lut TAMAM, 2021) Akgül, Özge; Önder, Betül
    The aim of this study was to assess the validity and reliability of the Turkish version of the Chemosensory Pleasure Scale, which is developed to determine the hedonic pleasure in taste and smell. The present study was conducted with a sample of 247 participants. Sociodemographic Form (SF), Chemosensory Pleasure Scale Turkish Version (CPS-TR), Physical Anhedonia Scale (PAS), and Social Anhedonia Scale (SAS) were used to collect data. For the reliability analysis, Cronchach alpha internal consistency coefficient, item-total score correlation coefficients, and Spearman-Brown split-half test were calculated, whereas Explanatory factor analysis was performed to estimate the construct validity of the scale. Considering the internal consistency reliability of the scale, Cronbach’s alpha reliability coefficient was found to be α=0.87. The item and total score correlation coefficients of the scale items were found between 0.35 and 0.70. Exploratory factor analysis explained 68.9% of the total variance and supported the three-factor structure of the scale. Factor loadings of these factors were estimated between 0.55-0.85. The correlation of CPS-TR with PAS and SAS was statistically significant. The results of this study suggest that the Turkish version of the CPS is a reliable and valid instrument for determining chemosensory pleasure
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    Circadian Rhythm and Leptin Hormone Responses to Nutritional Restriction in Gerbils (Meriones unguiculatus) with Suprachiasmatic Nucleus Lesions
    (ABADER (Adıyaman Bilimsel Arastırmalar Dernegi), 2023) Gündüz, Bülent; Önder, Betül; Ekin, Ahmet; Hasanoğlu, Nursel
    Rhythmically-regulated feeding behavior is in harmony with physiologic and metabolic activities in mammals. This rhythmic regulation is orchestrated by Suprachiasmatic Nucleus (SCN). However, it is not entirely clear how the SCN, which generates endogenous (internal) rhythms, influences body weight and serum leptin profile with activity rhythms in relation to feeding timing. In this study, animals in long photoperiod (14L:10D) were divided into two groups as control (sham-SCNx) and SCN lesions (SCNx). Then, these groups were split into four separate subgroups: a) ad libitum feeding; b) feeding only during the dark phase; c) feeding only during the light phase; and d) feeding during a specific period of the day (11:00-14:00 h). Locomotor activity and leptin hormone changes were observed in animals fed in cages attached to activity wheels for one month. Under the conditions of food restriction, the locomotor activities of the groups with SCNx and sham-SCNx demonstrated a phase shift toward the time of feeding. Serum leptin level did not change with feeding conditions but decreased in lesioned groups (SCNx). In conclusion, nutritional restriction caused phase shifts in activity rhythms and it was found that the SCN in gerbils was in charge of these rhythmic changes in the presence and absence of nutrients. © 2023, ABADER (Adıyaman Bilimsel Arastırmalar Dernegi). All rights reserved.