Van Yüzüncü Yıl Üniversitesi

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12 Years After Roboski: Prolonged Grief and Posttraumatic Effects
(American Psychological Association, 2025) Ayhan, C.H.; Tanhan, F.; Yağan, F.; Avcı Erdal, N.; Öztürk, G.; Bedir, G.; Aslangiri, S.
Objective: The Roboski massacre, which took place on December 28, 2011, is remembered as a major tragedy resulting from a cross-border operation by the Turkish Air Force that led to the loss of 34 civilians, including 19 children. This event not only caused significant physical losses but also left a profound psychological, social, and political impact on those affected. An enhanced comprehension of prolonged grief disorder’s development can assist professionals in identifying bereaved individuals requiring assistance and augment the efficacy of treatments. The aim of this study is to examine the relationship between the grief process and symptoms of posttraumatic stress, perceived discrimination, and political trust within the framework of the theory of prolonged grief in a sample of the bereaved family members who lost their relatives in the Roboski massacre almost 12 years postloss. Method: In total, 88 Kurdish individuals (Mage = 37.13, SD = 16.4; 53.4% males) who had lost their close relatives in the Roboski incident in 2011 participated in this study. The Prolonged Grief Scale, the Posttraumatic Stress Disorder Checklist for Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, the Perceived Discrimination Scale, and the Political Trust Scale were used to collect data. Results: The findings of the study revealed that, even approximately 12 years after the Roboski massacre, a significant portion of the participants continue to experience symptoms of prolonged grief and posttraumatic stress reactions. There was a positive correlation between prolonged grief symptoms and posttraumatic stress reactions (r =.71) as well as perceived discrimination (r =.53). It was also found that the subdimensions of posttraumatic stress, namely “reexperiencing” (β =.19, p <.05), “negative cognitive alterations” (β =.39, p <.05), and “perceived collective discrimination” (β =.11, p <.05), were significant predictors of prolonged grief. Conclusions: Our findings revealed that professionals should focus on identifying bereaved people who experience prolonged grief after a traumatic loss. Targeting these symptoms may alleviate the exacerbation of persistent grief reactions several years after a traumatic loss.Our findings suggest that addressing prolonged grief disorder following a massacre requires a multifaceted approach that includes early intervention, tailored therapeutic strategies, and robust social support systems. By integrating these elements, mental health professionals can significantly improve outcomes for those affected by traumatic loss, facilitating a path toward recovery and resilience. © 2025 American Psychological Association
The 23 October 2011 Mw7.0 Van (Eastern Turkey) Earthquake: Interpretations of Recorded Strong Ground Motions and Post-Earthquake Conditions of Nearby Structures
(Earthquake Engineering Research Institute, 2014) Akansel, V.; Ameri, G.; Askan, A.; Caner, A.; Erdil, B.; Kale, O.; Okuyucu, D.
A major thrust-fault earthquake of MW = 7.0 occurred on 23 October 2011 at 10:41:21 UTC in the eastern Anatolian region of Turkey, severely affecting the nearby towns of Van and Erciş. In this study, a few strong-motion records from the epicentral area are analyzed in order to investigate the characteristics of the ground motions. Also reported are the post-earthquake field observations for various types of structures, such as buildings, bridges, historical structures, tunnels, and dams within the vicinity of the fault plane. The spatial distribution of damage indicates a noticeable hanging-wall effect. The special-type structures are observed to experience far less damage, as opposed to the building structures in the region pointing to the need for strict compliance to seismic building code and the corresponding construction requirements.© 2014, Earthquake Engineering Research Institute.
A 3-Day Boy With a Right Preauricular Swelling
(Springer, 2010) Akgun, Cihangir; Peker, Erdal; Akbayram, Sinan; Dogan, Murat; Tuncer, Oguz; Kirimi, Ercan
A 3-day-old boy was admitted for right preauricular swelling. Examination showed a toxic looking neonate with poor neonatal reflexes. There was erythema and swelling of 4 x 3 cm at the level of the right cheek. Laboratory investigation pointed to a bacterial infection. With parenteral antibiotics, the lesion resolved completely.
A 3-Db 90 Degrees Microstrip Hybrid Directional Coupler at 2.27 Ghz
(Elsevier Gmbh, 2023) Imeci, Mehmet Yusuf; Tutuncu, Bilal; Imecl, Sehabeddin Taha
A 90 degrees hybrid-coupler in the 2.27 GHz range, offering high performance despite its size of 115.64 mm2 (18.36 & lambda;g), is introduced. The main factor that distinguishes this proposed design, positively, is that the device demonstrates high fabrication tolerances due to its simplicity, and uncomplicated length dimensions. At the center of the structure are 9 metal squares, all of equal size and equidistant. It has been observed that the S-parameters remain relatively the same after increasing or decreasing the side lengths, substrate parameters, and the vertical separation dimensions. Based on these results, it has been shown that the design will provide a successful fabrication tolerance. According to the simulation results, the S-parameters are as follows: S11 = -24.01, S12 = -3.063, S13 = -3.063, and S14 = -23.47 (all in dB). The phase deviation is only 0.8 degrees. After the simulation studies, a prototype of the coupler was fabricated, and laboratory measurements were made. The simulated and measured results, have desirable agreement. Finally, a few similar studies presented in the literature are discussed with a comparative table, in terms of overall size, isolation, phase deviation, and structure complexity. Thus, the advantages of this presented structure, compared to these studies, have been revealed.
3d-2d Microleakage Assessment of Preheated Bulk-Fill Composite Resin Applied With Different Parameters: a Micro-Ct Analysis
(Springer, 2023) Can, Dilber Bilgili; Ozarslan, Merve
This study evaluated microleakage from class II cavities filled with bulk-fill composite preheated to different temperatures, applied at different thicknesses, and with different polymerization modes. A total of 60 mesio-occlusal cavity were drilled into the extracted human third molars at 2 mm and 4 mm thickness. Preheated bulk-fill composite resin (Viscalor; VOCO, Germany) was applied to the cavities at 68 degrees C and 37 degrees C after the adhesive resin was applied, and cured using standard and high-power light-curing modes of a VALO light-curing unit. An incrementally applied microhybrid composite was used as the control. The teeth were subjected to 2000 cycles of heating to 55 degrees C and cooling to 5 degrees C with a 30-s hold time. Then, they were immersed in a 50% silver nitrate solution for 24 h and scanned with micro-computed tomography. Scanned data were processed using the CTAn software. Two (2D) and three (3D) dimensional analyses of leached silver nitrate were performed. The data's normality was assessed using the Shapiro-Wilk test before comparisons using a three-way analysis of variance. In both 2D and 3D analysis, bulk-fill composite resin preheated to 68 degrees C and applied at 2 mm thickness showed less microleakage. In the 3D analysis, restorations applied at 37 degrees C and 4 mm thickness in high-power mode showed significantly higher values (p < 0.001). Preheated bulk-fill composite resin can be applied at 68 degrees C and effectively cured at both 2 mm and 4 mm thickness.
A 5 Years Follow-Up for Ischemic Cardiac Outcomes in Patients With Carotid Artery Calcification on Panoramic Radiographs Confirmed by Doppler Ultrasonography in Turkish Population
(British inst Radiology, 2020) Akkemik, Ozlem; Kazaz, Hakki; Tamsel, Sadik; Dundar, Nesrin; Sahinalp, Sahin; Ellidokuz, Hulya
Objective: To evaluate the diagnostic accuracy of digital panoramic radiograph (DPR) for detection of carotid artery calcification (CAC) confirmed by Doppler Ultrasonography (DUSG) and to clarify the relationship between between CAC identified by DPR and cardiovascular events through a 5 year follow-up period. Methods: Of 3600 consecutive patients examined, 158 patients presented with CAC as detected by DPR. The final study group was composed of 96 patients who had CAC confirmed by DUSG or CT angiogram. The control group was composed of 62 patients who has normal DUSG. The end point of the study was the occurrence of any cardiovascular event. Results: 72 (75%) of the 96 patients with CAC confirmed by DUSG (16 patients had significant stenosis) had bilateral and 24 (25%) had unilateral CAS as detected by DUSG. There was a low agreement between the examination results with a kappa value of 0.488 (p < 0.005) for calcification. Study data revealed that smoking, chronic obstructive pulmonary disease (COPD), diabetes mellitus (DM) and diastolic hypertension were significantly more common in patients with CAC than the control group (p < 0.05). During the follow-up period, 13 subjects had myocardial infarction and 1 subject died; in the control group, 1 patient died after MI and 1 patient died of a non-cardiac event. Conclusion: Patients with CAC detectable by DPR concomitant with COPD, DM, smoking or diastolic hypertension are more likely to suffer from vascular events. Therefore, patients with detectable carotid plaque in DPR require referral to a cardiovascular surgery clinic for further investigations.
5-fluoro/(trifluoromethoxy)-2-indolinone Derivatives With Anti-Interleukin Activity
(Wiley-v C H verlag Gmbh, 2023) Soylu-Eter, Ozge; Sevincli, Zekiye Seyma; Ersoy, Betul; Hasanusta, Bahar; Gatfar, Ugur; Lack, Nathan A.; Karali, Nilgun
The pro-inflammatory cytokine interleukin-1 (IL-1) drives the pathogenesis of several inflammatory diseases. Recent studies have revealed that 2-indolinones can modulate cytokine responses. Therefore, we screened several 2-indolinone derivatives in preliminary studies to develop agents with anti-IL-1 activity. First, the putative efficacies and binding interactions of 2-indolinones were evaluated by docking studies. Second, previously synthesized 5-fluoro/(trifluoromethoxy)-1H-indole-2,3-dione 3-(4-phenylthiosemicarbazones) (compounds 47-69) which had the highest inhibitory effect in the screening were evaluated for inhibitory effects on the IL-1 receptor (IL-1R). Compounds 52 (IC50 = 0.09 mu M) and 65 (IC50 = 0.07 mu M) were selected as lead compounds for the subsequent synthesis of new derivatives. The novel 5-fluoro/(trifluoromethoxy)-1H-indole-2,3-dione 3-(4-phenylthiosemicarbazones) (compounds 70-116) were designed, synthesized, and in vitro studies were completed. The compounds 76, 78, 81, 91, 100, 105, and 107 tested showed nontoxic inhibitory effects on IL-1R-dependent responses in the range of 0.01-0.06 mu M and stronger than the lead compounds 52 and 65. In vitro and in silico findings showed that compounds 78 (IC50 = 0.01 mu M) and 81 (IC50 = 0.02 mu M) had the strongest IL-1R inhibitory effects and the most favorable drug-like properties. Molecular modeling studies of the compounds 78 and 81 were carried out to determine the possible binding interactions at the active site of the IL-1R. Novel 5-fluoro/(trifluoromethoxy)-2-indolinone derivatives were designed and synthesized based on in silico and preliminary in vitro test results from lead compounds. All compounds tested displayed nontoxic IL-1 receptor inhibitory effects at IC50 values in the range of 10 nM to 13 mu M, and seven compounds showed inhibitory responses stronger than the lead compounds at 0.01-0.06 mu M.image
Abcisic Acid and Gibberellic Acid Cause Increased Lipid Peroxidation and Fluctuated Antioxidant Defense Systems of Various Tissues in Rats
(Elsevier Science Bv, 2007) Celik, Ismail; Turker, Musa; Tuluce, Yasin
The study was aimed at demonstrating changes in the antioxidant defense systems [Reduced glutathione (GSH), glutathione reductase (GR), superoxide dismutase (SOD), glutathione-S-transferase (GST) and catalase (CAT)] forming an antioxidative barrier and oxidative stress parameter (Malondialdehyde = MDA) in the various tissues of Sprague-Dawley rats which were administrated plant growth regulators (PGRs) [Abcisic acid (ABA) and Gibberellic acid (GA(3))] during 25 days. Seventy five parts per million of ABA and GA(3) as drinking water were administered orally to rats (Sprague-Dawley albino) ad libitum for 25 days continuously. The PGRs treatments caused different effects on antioxidant defense systems and MDA content of experimented rats compared to controls. The lipid peroxidation end product MDA significantly increased in the spleen and lungs of rats treated with ABA and GA(3) without significantly change in the other tissues. The GSH levels were significantly increased in the lungs and stomach of rats treated with ABA without any change in the tissues of rats treated with GA(3). Antioxidant enzyme activities such as SOD significantly increased in the spleen of rats treated with ABA and GA(3). Meanwhile, SOD significantly increased in the kidney of rats treated with GA. CAT significantly decreased in the lungs treated with ABA but did not change significantly in all the rest of rat tissues treated with both the PGRs. On the other hand, the ancillary enzyme GR activity decreased in the spleen and increased in the kidney with GA(3) treatment. The drug metabolizing enzyme GST activity significantly decreased in the heart of rats treated with GA(3) but increased in the spleen and lungs of rats treated with both PGRs. The observations presented led us to conclude that administration of subacute ABA and GA(3) promotes lipid peroxidatin content and alters in the antioxidative systems in the rat's various tissues. These data, along with changes, suggest that the PGRs produced oxidative stress in rats during the period of a 25-day subchronic exposure. (C) 2007 Elsevier B.V. All rights reserved.
Abnormal Left Ventricular Longitudinal Functional Reserve Assessed by Exercise Pulsed Wave Tissue Doppler Imaging in Patients With Subclinical Hypothyroidism
(Endocrine Soc, 2009) Akcakoyun, Mustafa; Kaya, Hasan; Kargin, Ramazan; Pala, Selcuk; Emiroglu, Yunus; Esen, Ozlem; Esen, Ali Metin
Background: Response of systolic and diastolic velocities of mitral annulus to exercise in patients with subclinical hypothyroidism (SCH) has not been explored previously. We sought to investigate whether SCH is associated with abnormal left ventricular (LV) longitudinal function reserve to exercise. Methods: Mitral annular systolic (S') and early diastolic (E') velocities were measured at rest and during supine bicycle exercise using tissue Doppler echocardiography (TDE) in 23 patients with newly diagnosed SCH and 25 controls. LV diastolic and systolic longitudinal function reserve indices were calculated. Results: There were no significant differences in mitral inflow velocities at rest between groups except for LV end-diastolic dimension and LV end-systolic dimension, which were higher in the control group. E' and S' at rest were also similar between the groups. However, S' (9.8 +/- 1.5 vs. 11.3 +/- 1.5 cm/sec at 25 W, P = 0.001; and 11.3 +/- 1.8 vs. 13.1 +/- 1.8 cm/sec at 50 W, P = 0.001) and E' (13.8 +/- 1.4 vs. 15.7 +/- 1.6 cm/sec at 25 W, P = 0.001; and 15.6 +/- 1.6 vs. 18.2 +/- 1.5 cm/sec at 50 W, P < 0.001) during exercise were significantly lower in patients with SCH. Longitudinal systolic and diastolic function reserve indices were significantly lower in patients with SCH (systolic index, 1.4 +/- 0.9 vs. 2.5 +/- 0.9 cm/sec at 25 W, P = 0.001; and 2.7 +/- 1.3 vs. 4.1 +/- 1.2 cm/sec at 50 W, P = 0.001; diastolic index, 2.3 +/- 1.3 vs. 3.6 +/- 1.5 cm/sec at 25 W, P = 0.003; and 3.9 +/- 1.6 vs. 5.9 +/- 1.3 cm/sec at 50 W, P < 0.001). Conclusion: Assessment of LV longitudinal functional reserve with exercise using TDE appears to be helpful in identifying early myocardial dysfunction in SCH. (J Clin Endocrinol Metab 94: 2979-2983, 2009)
About the Paper "elephantiasis Neuro-Matosa and Becker's Melanosis" (J Dermatol, 26: 396-398, 1999)
(Japanese dermatolgical Assoc, 2001) Metin, A; Tuncay, I; Ugras, S
About Uniform Boundedness and Convergence of Solutions of Certain Non-Linear Differential Equations of Fifth-Order
(Malaysian Mathematical Sciences Soc, 2007) Tunc, Cemil
In this paper, we establish sufficient conditions under which all solutions of equation of the type X-(5) + f (t, (x)over dot, (x)double over dot, (x) triple over dot, x((4))) + phi(t, (x)over dot, <(x)double over dot>, (x) triple over dot) + phi (t, x, (x)over dot, <(x)double over dot>) + g(t, x, (x)over dot) + e(t)h(x) = p(t, x, (x)over dot, <(x)double over dot>, (x) triple over dot, x((4))) are uniformly bounded and tend to zero as t -> infinity. Our theorem is stated in a more general form; it extends some related results known in the literature. Also, the relevance of our result is to show that the results established in Abou El-Ela and Sadek [2,3] and Sadek [13] contain some superfluous conditions.
Absence of Frontal Sinus in Turkish Individuals
(Yonsei University College of Medicine, 2003) Aydinlioǧlu, A.; Kavakli, A.; Erdem, S.
The frontal sinus has been used for personal identification since the early part of the 20th century as a result of its tremendous interindividual variation. The frontal sinus is present in approximately 90% of adults. However, some populations have a higher proportion of people without a frontal sinus. This study investigated the frequency of the absence of frontal sinuses in Turkish individuals. The present study was performed retrospectively on the CT scans of the paranasal sinuses in the axial and coronal planes from a series of 1200 cases. A bilateral absence and a unilateral absence of sinuses were found in 3.8% and 4.8% of cases, respectively. The clinical significance of the frontal sinuses and their absence are also discussed.
Absence of the Mecc Gene in Methicillin-Resistant Staphylococcus Aureus Isolated From Various Clinical Samples: the First Multi-Centered Study in Turkey
(Elsevier Science London, 2019) Cikman, Aytekin; Aydin, Merve; Gulhan, Baris; Karakecili, Faruk; Kurtoglu, Muhammet G.; Yuksekkaya, Serife; Ozekinci, Tuncer
Background: mecA is a predefined gene causing methicillin resistance in Staphylococcus aureus (S. aureus) isolates; however, it has been shown that some methicillin-resistant S. aureus (MRSA) strains do not carry this gene. Recently, in isolates found to be MRSA-positive but mecA-negative, a new resistance gene called mecC, which is a homolog of mecA, has been reported. This study aimed to investigate the mecC and mecA genes in MRSA strains isolated from different geographic regions in Turkey. Methods: The sample of the study consisted of 494 MRSA strains isolated from seven geographical regions in Turkey between 2013 and 2016. The strains were obtained from 17 centers, comprising 13 university hospitals, three education and research hospitals, and one state hospital. Methicillin resistance in S. aureus strains was determined using the agar disk diffusion method with a cefoxitin disk and the agar dilution method with oxacillin. The mecC and mecA genes in MRSA strains was investigated by Polymerase Chain Reaction (PCR). Results: Of the MRSA strains investigated, 47.9% were isolated from intensive care units. Concerning sample type, 36.7% were detected in the respiratory tract (tracheal aspirate, sputum, etc.), 24.8% in blood, 18.7% in skin and soft tissues, 9.3% in nasal swabs, 5.4% in urine, 4.1% in ears, and 1% in sterile body fluid. Using PCR, mecC was not identified in any of the S. aureus strains isolated from different clinical microbiology laboratories. mecA gene positivity was found in 315 of the MRSA strains (63.8%). Staphylococcal Cassette Chromosome mec ( SCCmec) type was identified in 232 strains (46.9%), of which 136 (58.7%) were type II, 75 (32.4%) were type IV, 12 (5.1%) were type Mb, six (2.5%) were type I, and three (1.3%) were type III. Conclusion: This is the first multi-centered study to investigate MRSA strains isolated from different regions in Turkey. The mecC gene was not detected in any of the MRSA strains. We believe that this study will constitute an important basis for monitoring possible future changes. (C) 2019 The Authors. Published by Elsevier Limited on behalf of King Saud Bin Abdulaziz University for Health Sciences.
Absorbing Properties and Structural Design of Pvb/Fe3o4 Nanocomposite
(Elsevier Science Sa, 2019) Akinay, Yuksel; Hayat, Fatih; Colak, Bektas
Recently, a wide range of studies has been carried out on microwave absorber composites for use in telecommunications, electromagnetic pollution, stealth technology, and other applications. In this study, the microwave absorption properties of polyvinyl butyral (PVB)/polyaniline (PAM) coated-Fe3O4 (COM1) and PVB/Fe3O4 (COM2) nanocomposites with single and double layer were investigated in the 1-14 GHz for different thickness (t(m)) of composites. XRD, FT-IR, TEM, and SEM were used to determine the structure properties of the composites. The Coaxial transmission line method was used to obtain permittivity (epsilon', epsilon '') and permeability (mu', mu '')parameters of the composites. The reflection loss of the single and multilayers of different thicknesses was calculated. It was figured out that the higher value of reflection loss (R-L) (-51.5 dB at 11.9 GHz) was obtained with COM2 composite. However, using PANI has provided a wider absorption range in COM1 composites. It was found that multilayer composites (COM4) provide broadband absorption compared to COM2 and double-layer design (COM3).
Academic and Non-Academic Staff's Psychological Contract in Turkey
(Wiley, 2008) Aydin, Inayet; Yilmaz, Kursad; Memduhoglu, Hasan Basri; Oguz, Ebru; Gungor, Sabri
Studies of psychological contract as part of organisation-individual agreements have become important in recent years. This study determines views, about the psychological contract, of academic and non-academic staff and managers in faculties of education in Turkey. A total of 442 employees at 11 state universities in Turkey were included in the research. 'Psychological Contract Inventory' and 'Psychological Contract Measures', designed by Rousseau were utilised during the development process of the data-gathering tool. After the adaptation work, the scale consisted of 68 items under three sections and seven subscales. The results showed that academic staff and executives considered that their university carried out its obligations towards the staff at a 'moderate' level, whereas the non-academic staff considered it 'insufficient'. The academic and the non-academic staff considered that the employees carried out their tasks at a 'maximum' level, whereas the executives considered it 'moderate'.
Accelerated Atherosclerosis in Haemodialysis Patients; Correlation of Endothelial Function With Oxidative Dna Damage
(Oxford Univ Press, 2012) Kaya, Yuksel; Ari, Elif; Demir, Halit; Soylemez, Nihat; Cebi, Aysegul; Alp, Hakan; Beytur, Ali
Background. Accelerated atherosclerosis is the major cause of mortality in patients on chronic haemodialysis (HD). The aim of this study was to evaluate the relationship between oxidative DNA damage [8-hydroxy-2'-deoxyguanosine/deoxyguanosine ratio (8-OHdG/dG ratio)], oxidative stress biomarkers and endothelial function in HD patients as an indicator of atherosclerosis. Methods. Forty-four chronic HD patients without known atherosclerotic disease and 55 age- and sex-matched healthy individuals were included in the study. Plasma malondialdehyde (MDA) levels and 8-OHdG/dG ratio were determined as oxidative stress markers. Superoxide dismutase (SOD) and glutathione peroxidase (GPx) activities were measured as antioxidants. Endothelial function was assessed by ultrasonography. Results. 8-OHdG/dG ratio and MDA levels were higher in HD patients than controls while SOD and GPx activities were lower in HD patients compared to controls. Flow-mediated dilatation FMD% in HD patients were lower than the control group (7.28 +/- 0.79 versus 11.18 +/- 0.82, P < 0.001). There was a significant negative correlation between FMD% and 8-OHdG/dG ratio (r = -0.678, P < 0.01) and MDA levels (r = 0.517, P < 0.01), while there was a significant positive correlation between FMD% and SOD (r = 0.538, P < 0.01) and GPx levels (r = 0.720, P < 0.01). Conclusions. Our data have demonstrated that HD patients exhibit increased oxidative DNA damage and decreased antioxidant activity. We propose that endothelial function is negatively correlated with 8-OHdG/dG ratio and positively correlated with antioxidant enzymes. To our knowledge, this is the first study to demonstrate the inverse relationship between endothelial function and plasma oxidative DNA damage in HD patients.
Accuracy of Early Pregnancy Diagnosis and Determining Pregnancy Loss Using Different Biomarkers and Machine Learning Applications in Dairy Cattle
(Elsevier Science inc, 2024) Ferraz, Priscila Assis; Poit, Diego Angelo Schmidt; Pinto, Leonardo Marin Ferreira; Guerra, Arthur Cobayashi; Neto, Adomar Laurindo; do Prado, Francisco Luiz; Pugliesi, Guilherme
This study aimed to compare the accuracy of IFN-tau stimulated gene abundance (ISGs) in peripheral blood mononuclear cells (PBMCs), CL blood perfusion by Doppler ultrasound (Doppler-US), plasma concentration of P4 on Day 21 and pregnancy-associated glycoproteins (PAGs) test on Day 25 after timed-artificial insemination (TAI) for early pregnancy diagnosis in dairy cows and heifers. Holstein cows (n = 140) and heifers (n = 32) were subjected to a hormonal synchronization protocol and TAI on Day 0. On Day 21 post-TAI, blood samples were collected for PBMC isolation and plasma concentration of P4. The CL blood perfusion was evaluated by Doppler- US. Plasma samples collected on Day 25 were assayed for PAGs. The abundance of ISGs ( ISG15 and RSAD2) ) in PBMCs was determined by RT-qPCR. Pregnancy was confirmed on Days 32 and 60 post-TAI by B-mode ultrasonography. Statistical analyses were performed by ANOVA using the MIXED procedure and GLIMMIX in SAS software. The pregnancy biomarkers were used to categorize the females as having undergone late luteolysis (LL); early embryonic mortality (EEM); late embryonic mortality (LEM); or late pregnancy loss (LPL). The abundance of ISGs, CL blood perfusion by Doppler-US, and concentrations of P4 on Day 21, and PAGs test on Day 25 were significant (P <0.05) predictors of early pregnancy in dairy cows and heifers. Dairy cows had a greater (P = 0.01) occurrence of LL than heifers, but there was no difference (P > 0.1) for EEM, LEM, and LPL in heifers compared to cows. Cows with postpartum reproductive issues had a greater (P = 0.008) rate of LEM and a lesser (P = 0.01) rate of LPL compared to cows without reproductive issues. In summary, the CL blood perfusion by Doppler-US had the highest accuracy and the least number of false negatives, suggesting it is the best predictor of pregnancy on Day 21 post-TAI. The PAGs test was the most reliable indicator of pregnancy status on Day 25 post- TAI in dairy heifers and cows. The application of machine learning, specifically the MARS algorithm, shows promise in enhancing the accuracy of predicting early pregnancies in cows.
Accuracy of the London Atlas, Willems, and Nolla Methods for Dental Age Estimation: a Cross-Sectional Study on Eastern Turkish Children
(Springer Heidelberg, 2021) Koc, Alaettin; ozlek, Esin; oner Talmac, Ayse Gul
Objectives This study aimed to estimate the dental age (DA) using the London Atlas, Willems, and Nolla methods and to compare their accuracies. Methods The DA was estimated using the aforementioned methods on panoramic radiograms of a total of 919 Eastern Turkish patients aged 6-14 years, of whom 459 were female and 460 were male. The overestimation and underestimation values were determined in relation to the chronological age (CA) values. The paired t test was used to compare the mean DA and CA values. Multiple regression analysis was used to derive gender-specific formulations for the three methods. Results The most accurate method for estimating the DA was the Willems method (mean prediction error 0.80), followed by the London Atlas (mean prediction error 0.83) and Nolla (mean prediction error 0.89) methods. Statistically significant differences were found only between the Willems and Nolla methods. Conclusion All three methods can be used for DA estimations of Eastern Turkish children. Clinical relevance Willems was the most suitable method for this patient sample. However, the London Atlas method may be preferred due to its practicability and comparable accuracy.
Acoustic Radiation Force Impulse Imaging for Evaluation of Renal Parenchyma Elasticity in Diabetic Nephropathy
(Amer Roentgen Ray Soc, 2015) Goya, Cemil; Kilinc, Faruk; Hamidi, Cihad; Yavuz, Alpaslan; Yildirim, Yasar; Cetincakmak, Mehmet Guli; Hattapoglu, Salih
Objective: The goal of this study is to evaluate the changes in the elasticity of the renal parenchyma in diabetic nephropathy using acoustic radiation force impulse imaging. SUBJECTS AND METHODS. The study included 281 healthy volunteers and 114 patients with diabetic nephropathy. In healthy volunteers, the kidney elasticity was assessed quantitatively by measuring the shear-wave velocity using acoustic radiation force impulse imaging based on age, body mass index, and sex. The changes in the renal elasticity were compared between the different stages of diabetic nephropathy and the healthy control group. RESULTS. In healthy volunteers, there was a statistically significant correlation between the shear-wave velocity values and age and sex. The shear-wave velocity values for the kidneys were 2.87, 3.14, 2.95, 2.68, and 2.55 m/s in patients with stage 1, 2, 3, 4, and 5 diabetic nephropathy, respectively, compared with 2.35 m/s for healthy control subjects. Acoustic radiation force impulse imaging was able to distinguish between the different diabetic nephropathy stages (except for stage 5) in the kidneys. The threshold value for predicting diabetic nephropathy was 2.43 m/s (sensitivity, 84.1%; specificity, 67.3%; positive predictive value, 93.1%; negative predictive value 50.8%; accuracy, 72.1%; positive likelihood ratio, 2.5; and negative likelihood ratio, 0.23). CONCLUSION. Acoustic radiation force impulse imaging could be used for the evaluation of the renal elasticity changes that are due to secondary structural and functional changes in diabetic nephropathy.
Active Shrinkage Protects Neurons Following Axonal Transection
(Cell Press, 2023) Aydin, Mehmet Sxerif; Bay, Sadik; Yigit, Esra Nur; Ozgul, Cemil; Oguz, Elif Kaval; Konuk, Elcin Yenidunya; Ozturk, Gurkan
Trauma, vascular events, or neurodegenerative processes can lead to axonal injury and eventual transec(axotomy). Neurons can survive axotomy, yet the underlying mechanisms are not fully understood. Excessive water entry into injured neurons poses a particular risk due to swelling and subsequent death. Using in vitro and in vivo neurotrauma model systems based on laser transection and surgical nerve cut, demonstrated that axotomy triggers actomyosin contraction coupled with calpain activity. As a consequence, neurons shrink acutely to force water out through aquaporin channels preventing swelling and bursting. Inhibiting shrinkage increased the probability of neuronal cell death by about 3-fold. These studies reveal a previously unrecognized cytoprotective response mechanism to neurotrauma and offer fresh perspective on pathophysiological processes in the nervous system.

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