Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Erdogdu, Ferruh(2)
- Liu, Shuxiang(2)
- Ozturk, Samet(2)
- Balsalobre-Lorente, Daniel(1)
- Bayraktar, Yuksel(1)
- Cao, Shidi(1)
- Efeoglu, Hasan(1)
- Gul, Fatih(1)
- Ji, Kexin(1)
- Liu, Xingyi(1)
- Ozyilmaz, Ayfer(1)
- Qin, Wen(1)
- Qiu, Yan(1)
- Recepoglu, Mursit(1)
- Senturk, Nazli Keyifli(1)
- Sun, Rui(1)
- Wu, Qingping(1)
- Yang, Ren(1)
- Zhao, Huan(1)
Yayınlar
- MakaleYalnız künye2026An insight of oil protection theory: Survival, structural and metabolic adaptation of Salmonella enterica Enteritidis Phage Type 30 in three triglycerides
Zhao, Huan; Sun, Rui; Cao, Shidi; Ozturk, Samet; Erdogdu, Ferruh; Liu, Xingyi; Liu, Shuxiang
Oil protection theory posits that oil enhances microbial survival and heat resistance in low-moisture foods, yet the role of triglyceride composition remains poorly defined. This study investigates how Salmonella enterica Enteritidis PT 30 adapts during desiccation in peanut oil (mixed triglycerides, aw,25 degrees C = 0.30) and two representative components, namely, trilinolein and glyceryl trioleate. The lipid-specific structural and metabolic adaptations were analyzed through confocal microscopy and transcriptomics. S. Enteritidis exhibited the lowest persistence (3.43-log reduction over 180 days) and weakest heat resistance (2.5 h at 80 degrees C to achieve 3.5-log reduction) in peanut oil. The survival of S. Enteritidis in triglycerides could be correlated with its metabolic dormancy via suppression of ribosomal and oxidative phosphorylation pathways. Trilinolein enhanced S. Enteritidis' heat resistance (30 h at 80 degrees C for 3.5-log reduction) and moderate storage mortality (1.64-log reduction at 180 d), driven by stress hyperactivity. Glyceryl trioleate balanced heat tolerance (8 h) with optimal storage survival (1.19-log reduction), mediated by partial metabolic suppression. Peanut oil preserved S. Enteritidis transient motility in water-rich microenvironments, while pure triglycerides formed compact, dehydrated aggregates. Transcriptomics identified divergent strategies. Peanut oil induced dormancy at the expense of stress resilience, whereas homogeneous lipids imposed distinct constraints; that is, trilinolein amplified oxidative stress, and glyceryl trioleate intensified desiccation. These findings refine oil protection theory, demonstrating that lipid heterogeneity-not just low water activity-shapes microbial outcomes. The mixed components of peanut oil buffer stress but limit protective efficacy, while its purified constituents reveal how specific triglycerides modulate survival. This mechanistic understanding advances theoretical models of pathogen persistence in oily matrices and guides targeted strategies to mitigate risks in low-moisture oil-rich food systems.
- MakaleAçık Erişim2025The effects of sub-components of economic freedom on load capacity factor: Empirical analysis for MENA countries
Senturk, Nazli Keyifli; Bayraktar, Yuksel; Recepoglu, Mursit; Ozyilmaz, Ayfer; Balsalobre-Lorente, Daniel
This study investigates the effects of economic freedom sub-components on load capacity factor (LCF) in 12 MENA countries for 2017-2022. The 12 sub-components of the economic freedom index were used as independent variables, and the load capacity factor was used as the dependent variable. In the study, four-panel data models were created using the subcomponents of the economic freedom index, and a two-stage System-GMM was used. According to the study, while property rights reduce the load capacity factor, Judicial Effectiveness increases it. The effect of Government Integrity on the load capacity factor is statistically insignificant. While Government spending negatively affects the load capacity factor, Tax Burden and Fiscal Health are statistically insignificant. Business freedom affects the load capacity factor positively, but monetary freedom affects it negatively. Labour freedom is statistically insignificant. On the other hand, trade freedom and investment freedom have a positive impact on the load capacity factor, while financial freedom has a negative effect.
- MakaleYalnız künye2023Effect of oil exposure stages on the heat resistance of Salmonella enterica serovar Enteritidis phage type 30 in peanut flour
Liu, Shuxiang; Qiu, Yan; Ji, Kexin; Ozturk, Samet; Erdogdu, Ferruh; Qin, Wen; Yang, Ren; Wu, Qingping
The oil in low-moisture foods (LMFs) shows protective effects on bacteria during thermal processing. However, the circumstances under which this protective effect strengthens remain unclear. This study aimed to understand which step of the oil exposure to bacterial cells (inoculation, isothermal inactivation, or recovery and enumer-ation step) in LMFs can enhance their heat resistance. Peanut flour (PF) and defatted PF (DPF) were selected as the oil-rich and oil-free LMF models. Salmonella enterica Enteritidis Phage Type 30 (S. Enteritidis) was inoculated into four designated PF groups representing different oil exposure stages. It was isothermally treated to obtain heat resistance parameters. At a constant moisture content (aw,25 degrees C = 0.32 +/- 0.02) and controlled aw,85 degrees C (0.32 +/- 0.02), S. Enteritidis exhibited significantly high (p < 0.05) D values in oil-rich sample groups. For instance, the heat resistance values of S. Enteritidis in the PF-DPF and DPF-PF groups were D80 degrees C of 138.22 +/- 7.45 min and 101.89 +/- 7.82 min; however, the D80 degrees C in the DPF-DPF group was 34.54 +/- 2.07 min. The oil addition after the thermal treatment also helped injured bacterial recovery in the enumeration. For instance, the D80 degrees C, D85 degrees C, and D90 degrees C values in the DFF-DPF oil groups were 36.86 +/- 2.30, 20.65 +/- 1.23, and 7.91 +/- 0.52 min, respectively, which were higher than those in the DPF-DPF group at 34.54 +/- 2.07, 17.87 +/- 0.78, and 7.10 +/- 0.52 min. We confirmed that the oil protected S. Enteritidis in PF in all three stages: desiccation process, heat treatment, and recovery of bacterial cells in plates.
- MakaleYalnız künye2017Bipolar resistive switching and conduction mechanism of an Al/ZnO/Al-based memristor
Gul, Fatih; Efeoglu, Hasan
In this study, a direct-current reactive sputtered AliZnO/Al-based memristor device was fabricated and its resistive switching (RS) characteristics investigated. The optical and structural properties were confirmed by using UV vis spectrophotometry and x-ray diffraction, respectively. The memristive and resistive switching characteristics were determined using time dependent current voltage (I-V-t) measurements. The typical pinched hysteresis I-V loops of a memristor were observed. In addition, the device showed forming-free, uniform and bipolar RS behavior. The low electric field region exhibited ohmic conduction, while the Schottky emission (SE) was found to be the dominant conduction mechanism in the high electric field region. A weak Poole-Frenkel (PF) emission also appeared. In conclusion, it was suggested that the SE and PF mechanisms were related to the oxygen vacancies in the ZnO. (C) 2016 Elsevier Ltd. All rights reserved.
- DergiSUPERLATTICES AND MICROSTRUCTURES
- DergiJOURNAL OF ENVIRONMENTAL MANAGEMENT
- DergiFOOD MICROBIOLOGY