WoS İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12514/3595

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Citation - WoS: 21
Citation - Scopus: 30
The effect of the COVID-19 pandemic on self-management in patients with type 2 diabetics
(Elsevier, 2021) Utli, Hediye; Vural Doğru, Birgül
Aims: The research was conducted with the aim of determining the effect of the COVID-19 pandemic on levels of self-management in individuals with type 2 diabetes. Methods: This cross-sectional descriptive type of study was conducted between 21 December 2020 and 1 April 2021. It was performed with 378 individuals with type 2 diabetes attending the endocrinology clinic and outpatients' department of a government hospital who agreed to participate in the research. In the collection of data, a Patient Identification Form, Visual Analog Scales (an Anxiety VAS and a Stress VAS), and the Diabetes Self-Management Questionnaire (DSMQ) were used. The Wilcoxon test, Independent Sample t test, One-Way Anova and binary logistic regression were used in the analysis of data. Results: The Diabetes Self-Management Questionnaire (DSMQ) total mean score of the individuals with type 2 diabetes participating in the study during the COVID-19 pandemic was 5.25 ± 1.04. Their anxiety total mean score was 0.32 ± 1.56, and their total mean stress score was 7.06 ± 1.62. Being male, over the age of 65, married and having a diagnosis of diabetes for 6-11 years, increased smoking, the COVID-19 pandemic, reduced physical activity (not walking) and support obtained from health professionals, and increased anxiety and stress levels were found to be risk factors affecting diabetic self-management. Conclusions: The findings show that the COVID-19 pandemic has had a negative effect on the self-management levels of individuals with type 2 diabetes.
Citation - WoS: 2
Citation - Scopus: 2
Evaluation of patients diagnosed with congenital hypothyroidism by newborn screening between 2011-2019 in Diyarbakir, Turkey
(LWW, 2023) Toktaş, İzzettin; Erdem, Özgür; Sarıbaş, Seyfettin; Özbek, Mehmet Nuri
This study aimed to determine the incidence of congenital hypothyroidism in Turkey’s Diyarbakir Province and assess the development and growth conditions of people with congenital hypothyroidism. Patients born between 2011-2019 and diagnosed with congenital hypothyroidism within the scope of the newborn screening program were included. The medical records of these patients were retrospectively reviewed. The length and weight for age, weight for length, and body mass index standard deviation scores were calculated. We investigated the treatment status of the patients, whether their relatives had a similar disorder, and the presence of consanguinity between parents. Blood samples were collected from 380,592 newborns. As a result of further tests, 498 newborns were diagnosed with congenital hypothyroidism (incidence: 1/764). Demographic and anthropometric data of 241 patients were analyzed. The patients comprised 46.9% (n = 113) females and 53.1% (n = 128) males. It was determined that 44.4% of the individuals had transient congenital hypothyroidism and 53.6% had permanent congenital hypothyroidism. The parents of 29.8% of the individuals diagnosed with transient congenital hypothyroidism and 44.2% of the individuals diagnosed with permanent congenital hypothyroidism were consanguineous (P = .02). According to the latest anthropometric assessment, 6.8% of individuals diagnosed with congenital hypothyroidism had a weight z-score below −2 SD and 16.9% had a length z-score below −2 SD. The incidence of congenital hypothyroidism was higher in our region. The ratio of consanguinity between parents was higher in patients diagnosed with permanent congenital hypothyroidism than in those diagnosed with transient congenital hypothyroidism. According to the most recent follow-up, weight and age were found to be similar in patients with transient and permanent congenital hypothyroidism.
Citation - WoS: 24
Citation - Scopus: 36
Experiences of visitors to Gallipoli, a nostalgia-themed dark tourism destination: an insight from TripAdvisor
(EMERALD GROUP PUBLISHING LTD, 2018) Cakar, Kadir;
Purpose - The purpose of this paper is to examine and understand the experiences of travelers to Gallipoli, by analyzing their online comments and reviews. Design/methodology/approach - The data were garnered from the well-known online user blog TripAdvisor. Data, concerning visiting the Gallipoli Peninsula, were retrieved from (n = 330) travelers' reviews and comments, and were examined using content analysis to elicit and identify their experiences. Findings - Overall, the travelers' reviews and comments mostly conveyed emotional and nostalgic experiences. Further, the travelers' nostalgic experiences of Gallipoli emerged as historical nostalgia deriving from the personal attachment of travelers to the site. Research limitations/implications - The data have shown that the experiences of travelers to Gallipoli can mostly be identified as emotional, which are generally consistent with the current literature. This paper utilized traveler reviews and comments on TripAdvisor, left by tourists who had previously visited Gallipoli, and this represents the limitation of the present study. Thus, to better understand the experiences of travelers visiting Gallipoli, with regard to their psychological aspect, future research should be conducted with travelers either through face-to-face interviews or via a survey. Originality/value - Despite its significance for dark tourists, limited research has been carried out that deals with the experiences of travelers visiting the Gallipoli battlefield. As such, this is the first research project designed to highlight the experience of dark tourism, under the concept of nostalgic tourism, by providing valuable data and a deeper understanding of the field.
The Role of Statins in Modulating Subclinical Inflammatory Markers in Coronary Slow Flow Phenomenon
(Lippincott Williams & Wilkins, 2025) Demirci, Murat; Mustafayev, Urfan; Atas, Halil; Oguz, Mustafa; Kilic, Raif; Sunbul, Murat
Coronary slow flow phenomenon (CSFP) is characterized by slow coronary blood flow in the absence of significant stenosis, and its pathophysiology is associated with endothelial dysfunction, microvascular abnormalities, and inflammation. This study aimed to investigate the effects of statin therapy on subclinical inflammatory markers in CSFP patients. This retrospective cohort study included patients diagnosed with CSFP by using coronary angiography. The patients were divided into statin and control groups based on the initiation of statin therapy. Inflammatory markers, including neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), systemic immune-inflammation index (SII), and systemic inflammation response index (SIRI) were assessed at baseline and 3 months later. At baseline, NLR, PLR, SII, and SIRI levels were comparable between the 2 groups. After 3 months, these markers were significantly lower in the statin group. In the statin group, the NLR, PLR, SII, and SIRI levels significantly decreased from baseline, whereas no significant changes were observed in the control group. The reduction in inflammatory marker levels was more pronounced in patients receiving high-dose statins. Statin therapy is associated with reduced subclinical inflammation in CSFP, supporting the inflammatory basis and therapeutic value of statins.
Citation - WoS: 2
Citation - Scopus: 5
The historical possibility and necessity of (Ilyenkov's) anti-innatism
(SAGE PUBLICATIONS LTD, 2017) Azeri, Siyaves
An important aspect of Evald Ilyenkov's theory of social mind is anti-innatism. Anti-innatism is not only the necessary logical outcome of Ilyenkov's overall philosophical system and in particular of his anti-reductionism, but also it is a socio-historically possible and necessary consequence of the capitalist mode of production, which amounts to the formation of a gap between socially formed human knowledge and growth of the productive powers, on the one hand, and value-producing labour, on the other.
Citation - WoS: 1
Citation - Scopus: 2
First report of fruit rot of eggplant caused by Pythium viniferum in Turkey
(SpringerLink, 2021) Türkölmez, Şahimerdan; Özer, Göksel; Çiftçi, Osman; Derviş, Sibel
In August 2019, symptoms including dark brown and irregular sunken lesions or blights on the fruit pedicel and calyx of eggplants (Solanum melongena L.) occurred with a 3% incidence in two felds in Şanlıurfa province of Turkey.
Citation - WoS: 3
Citation - Scopus: 4
Removal of carbol fuchsin from aqueous solution by using three-dimensional porous, economic, and eco-friendly polymer
(Water Environment Research, 2021) Tarhan, Tuba
In this study, a three-dimensional (3D) porous polydimethylsiloxane (PDMS) was prepared using a cheap material with a highly simple and different method. PDMS was firstly applied for the removal of carbol fuchsin (CF) cationic organic dye pollution in this study. Besides, the adsorption capacity of 3D PDMS for removal of the CF was found quite high compared to other materials in already published results. The synthesized PDMS was characterized using several spectroscopic and imaging techniques such as FTIR, Raman, SEM, stereomicroscope, EDX, UV/Vis, and TGA. The optimal conditions were found as 10 mg L−1 initial concentration, 20 mg of adsorbent dose, 2 h contact time, pH 10, and 25°C temperature. The removal % of CF and the maximum adsorption capacity were calculated at approximately 89% and 88.8 mg g−1, respectively. Furthermore, the equilibrium studies showed that the Langmuir isotherm model fitted well with the removal of CF. Moreover, according to the kinetic results, the second-order kinetic model was found suitable (qe,cal 89.3 mg g−1 and qe,exp 88.8 mg g−1 close to each other) for the adsorption of CF. Also, the thermodynamic studies indicated that adsorption occurs spontaneously, and the adsorption process was physical adsorption. Besides, the reusability of the adsorbent was studied. Practitioner points: Water treatment technology should be low cost, economically viable and in the meantime, eco-friendly. The 3D porous PDMS was prepared by using cheap material with a highly simple method and eco-friendly This unique material was firstly applied for the removal of organic dye in water in this study.
Citation - WoS: 9
Citation - Scopus: 11
Determination of the Fatty Acid Composition of the Fruits and Different Organs of Lentisk (Pistacia lentiscus L.)
(TAYLOR & FRANCIS LTD, 2015) Akdemir, Ömer Faruk; Tilkat, Engin; Onay, A.; Keskin, Cumali; Başhan, Mehmet; Kilinc, F. M.; Kizmaz, V.; Suzerer, V.
This paper reports the fatty acid composition of the oil extracts from seeds and in vivo and in vitro grown organs of Pistacia lentiscus L. were determined by using gas chromatography. The main fatty acids were linoleic (LA), palmitic (PALM), oleic (OLA) and linolenic (ALA) acids in the fruits, resins and in both in vivo and in vitro grown root, leaf and stem sections of male or female tree. The major fatty acids were represented by polyunsaturated fatty acids (PUFA) accounting for 56.94 %, 64.44 % and 55.57 % in root, leaf and stem part of male tree grown in vivo, respectively. The prominent class of fatty acid composition of different male organs of P. lentiscus L. regenerated in vitro was represented by PUFA accounting for 63.24 %. The monounsaturated fatty acid (MUFA), OLA and PUFA, LA were determined in the oils of the two genotypes studied.
Automated Mucormycosis Diagnosis from Paranasal CT Using ResNet50 and ConvNeXt Small
(MDPI, 2025) Toprak, Serdar Ferit; Dedeoglu, Serkan; Kozan, Gunay; Ayral, Muhammed; Can, Sermin; Turk, Omer; Akdag, Mehmet
Purpose: Mucormycosis is a life-threatening fungal infection, where rapid diagnosis is critical. We developed a deep learning approach using paranasal computed tomography (CT) images to test whether mucormycosis can be detected automatically, potentially aiding or expediting the diagnostic process that traditionally relies on biopsy. Methods: In this retrospective study, 794 CT images (from patients with mucormycosis, nasal polyps, or normal findings) were analyzed. Images were resized and augmented for training. Two transfer learning models (ResNet50 and ConvNeXt Small) were fine-tuned to classify images into the three categories. We employed a 70/30 train-test split (with five-fold cross-validation) and evaluated performance using accuracy, precision, recall, F1-score, and confusion matrices. Results: The ConvNeXt Small model achieved 100% accuracy on the test set (precision/recall/F1-score = 1.00 for all classes), while ResNet50 achieved 99.16% accuracy (precision approximate to 0.99, recall approximate to 0.99). Cross-validation yielded consistent results (ConvNeXt accuracy similar to 99% across folds), indicating no overfitting. An ablation study confirmed the benefit of transfer learning, as training ConvNeXt from scratch led to lower accuracy (similar to 85%) Conclusions: Our findings demonstrate that deep learning models can accurately and non-invasively detect mucormycosis from CT scans, potentially flagging suspected cases for prompt treatment. These models could serve as rapid screening tools to complement standard diagnostic methods (histopathology), although we emphasize that they are adjuncts and not replacements for biopsy. Future work should validate these models on external datasets and investigate their integration into clinical workflows for earlier intervention in mucormycosis.
Citation - WoS: 22
Citation - Scopus: 19
Effect of Silver Nanopowder Addition on Mechanical Properties of Silver-Copper Alloy Used in the Jewellery Industry
(Sage Publications Ltd, 2025) Adin, Hamit; Akgul, Sabahattin; Adin, Mehmet Sukru
In this research, silver nanopowder (at rates of 0%, 0.5%, 1%, 1.5% and 2%) was added to 925-carat silver-copper alloy used in manufacturing silver jewellery to increase its durability and to observe its mechanical properties occurred. In this context, different mechanical tests (tensile, bending and hardness) were performed on exclusively produced silver-copper alloys. Moreover, mechanical simulation tests were conducted via ANSYS software using the data obtained from the experimental results. In the tensile tests, it was observed that the use of nanopowder at the rates of 0.5% and 1% positively affected the tensile strength and strain values, while when the nanopowder rate exceeded 1%, both parameters were negatively affected. According to tensile test results, the ductility of the alloy material decreases as the rates of nanopowder addition rise. In the bending tests, it was observed that the addition of 1% nanopowder increased the bending strength significantly; however, other addition rates had a negative effect. Hardness measurements showed that the 1% nanopowder ratio had a much higher effect (in terms of increasing the hardness value) on the hardness value than 0.5%, 1.5% and 2% nanopowder ratios. In order to verify the numerical analysis model, the results of both experimental and numerical analyses were compared. The success of numerical modelling was found to be similar to 96% in terms of both tensile strength and displacement. Many methods are used in the jewellery industry, especially in silver jewellery. To easily shape the material to be used in filigree, repousse, and tattoo techniques, the material must be somewhat soft and pliable. Therefore, if production is carried out using these techniques, it is not advisable to add large amounts of nanopowder to the alloy. Furthermore, adding quite low amounts (0.1%, 0.5% etc.) of nanopowder to the silver-copper alloy will provide efficient results in shaping-based production techniques.
Citation - WoS: 11
Citation - Scopus: 13
Multi-task learning for arousal and sleep stage detection using fully convolutional networks
(IOP Publishing, 2023) Zan, Hasan; Yıldız, Abdulnasir
Objective: Sleep is a critical physiological process that plays a vital role in maintaining physical and mental health. Accurate detection of arousals and sleep stages is essential for the diagnosis of sleep disorders, as frequent and excessive occurrences of arousals disrupt sleep stage patterns and lead to poor sleep quality, negatively impacting physical and mental health. Polysomnography is a traditional method for arousal and sleep stage detection that is time-consuming and prone to high variability among experts. Approach: In this paper, we propose a novel multi-task learning approach for arousal and sleep stage detection using fully convolutional neural networks. Our model, FullSleepNet, accepts a full-night single-channel EEG signal as input and produces segmentation masks for arousal and sleep stage labels. FullSleepNet comprises four modules: a convolutional module to extract local features, a recurrent module to capture long-range dependencies, an attention mechanism to focus on relevant parts of the input, and a segmentation module to output final predictions. Main results: By unifying the two interrelated tasks as segmentation problems and employing a multi-task learning approach, FullSleepNet achieves state-of-the-art performance for arousal detection with an area under the precision-recall curve of 0.70 on Sleep Heart Health Study and Multi-Ethnic Study of Atherosclerosis datasets. For sleep stage classification, FullSleepNet obtains comparable performance on both datasets, achieving an accuracy of 0.88 and an F1-score of 0.80 on the former and an accuracy of 0.83 and an F1-score of 0.76 on the latter. Significance: Our results demonstrate that FullSleepNet offers improved practicality, efficiency, and accuracy for the detection of arousal and classification of sleep stages using raw EEG signals as input.
Citation - WoS: 20
Citation - Scopus: 21
Theoretical and experimental investigations on corrosion control of mild steel in hydrochloric acid solution by 4-aminothiophenol
(EMERALD GROUP PUBLISHING LTD, 2019) Yildiz, Resit; Mert, Basak Dogru
Purpose This paper aims to study inhibitory effect of 4-aminothiophenol on the corrosion of mild steel (MS) in 0.5 M HCl. Design/methodology/approach In this study, electrochemical experiments, quantum chemical calculations, potentiodynamic measurements, linear polarization resistance and scanning electron microscopy were used. Findings The experimental results suggest that this compound is efficient corrosion inhibitor and the inhibition efficiencies increase with increasing their (from 0.5 to 10.0 mM.) concentrations. This reveals that inhibitive actions of inhibitors were mainly due to adsorption on mild steel surface. The adsorption of these inhibitors was found to obey Langmuir adsorption model. The computed quantum chemical features show good correlation with empirical inhibition efficiencies. Originality/value The 4-aminothiophenol is suitable inhibitor for application in closed-circuit systems against corrosion. The study is original and has great impact in industrial area. The obtained theoretical results have been adapted with the experimental data.
Citation - Scopus: 1
Activity of nanosized copper-boron alloys against Phytophthora species
(Springer Science and Business Media Deutschland GmbH, 2023) Yiğit, Uğur; Türkkan, Muharrem; İlhan, Hasan; Şimşek, Tuncay; Güler, Ömer; Derviş, Sibel
This study aimed to evaluate the antifungal activity of copper-boron (Cu-B) nanoalloys against a range of Phytophthora species, including P. capsici, P. citrophthora, P. palmivora, P. cinnamomi, P. nicotianae, P. cactorum, P. plurivora, P. inundata, and P. megasperma. The nanoalloys were synthesized via mechanical alloying under an argon atmosphere, resulting in the formation of nanocrystalline Cu-B nanoalloys with irregular morphology and particle sizes ranging from 50 to 240 nm. At a concentration of 250 µg mL−1, the Cu-B nanoalloys demonstrated complete inhibition of mycelial growth, sporangium production, and zoospore germination in all tested Phytophthora species. The EC50 values for mycelial growth ranged from 28.02 to 120.17 µg mL−1, while for sporangium production and zoospore germination, they were below 10 µg mL−1. Furthermore, the nanoalloys exhibited fungicidal activity against specific Phytophthora species, such as P. capsici, P. citrophthora, P. inundata, and P. megasperma, at concentrations of 100, 250, 250, and 250 µg mL−1, respectively. Notably, the Cu-B nanoalloys displayed significant protective and curative effects on tuber rot severity in P. nicotianae-inoculated potatoes, resulting in reductions of 94.13% and 92.61% compared to the control, respectively, at a concentration of 10 µg mL−1 (P < 0.05). These findings highlight the potential of Cu-B nanoalloys as a promising fungicide for the management of plant diseases caused by Phytophthora spp.
Citation - WoS: 36
Citation - Scopus: 46
gamma-Fe2O3 magnetic nanoparticle functionalized with carboxylated multi walled carbon nanotube: Synthesis, characterization, analytical and biomedical application
(ELSEVIER SCIENCE BV, 2016) Kilinc, Ersin
In recent years, magnetic nanoparticles attained special interest in nanobiotechnology and nanomedicine due to their uniqe properties and biocompatibilities. From this perspective, hybride nanostructure composed from gamma-Fe2O3 magnetic nanoparticle and carboxylated multi walled carbon nanotube was synthesized and characterized by FT-IR, VSM, SEM, HR-TEM and ICP-OES. Microscopy images showed that magnetic nanoparticles were nearly spherical structure that arranged on the axis of carboxylated MWCNT. Particle size was found lower than 10 nm. VSM results showed that the obtained magnetic nanoparticles presented superparamagnetic properties at room temperature. The magnetic saturation value was determined as 35.2 emu/g. It was used for the adsorption and controlled release of harmane, a potent tremor-producing neurotoxin. Maximum adsorption capacity was calculated as 151.5 mg/g from Langmuir isotherm. Concentration of harmane was determined by HPLC with fluorescence detection. The antimicrobial activity of synthesized magnetic nanoparticle was investigated against gram-negative and gram-positive bacteria. However, no activity was observed. (C) 2015 Elsevier B.V. All rights reserved.
A Multidimensional Perspective of Chefs on the Role of Technology in Restaurants
(Routledge Journals, Taylor & Francis Ltd, 2025) Seyitoglu, Faruk; Yigit, Serkan; Engin, Suleyman; Fuste-Forne, Francesc
This research evaluates chefs' perceptions of the role of technology in restaurant kitchens. It adopts a comprehensive approach that integrates the relevant factors identified in previous research to provide a multidimensional approach. Following a qualitative research design, semi-structured interviews were conducted with 27 restaurant chefs. The perceptions of chefs on the role of technology in restaurant kitchens consist of eight main themes, which include mostly positive aspects: food and service quality, human resources, financial, competitiveness, image, customer experience, food waste and job safety. This research contributes to a theoretical and practical understanding of the relationship between restaurant management and technology in service industries, specifically the restaurant industry, and offers a conceptual model of the role of technology in restaurant kitchens.
Citation - WoS: 14
Citation - Scopus: 16
The effects of Reiki and back massage on women's pain and vital signs post-abdominal hysterectomy: A randomized controlled trial: The Effects of Reiki and Back Massage on Women's Pain and Vital Signs
(Elsevier, 2021) Utli, Hediye; Yağmur, Yurdagül
Background: Using Reiki and back massage to support pharmacological treatments is increasingly common in nursing. This study aimed to determine the effects of Reiki and back massage on pain, analgesic use, and vital signs among women who had undergone an open abdominal hysterectomy. Methods: This experimental study involved a single, blinded, pretest-posttest design. The study population comprised women who had undergone an abdominal hysterectomy at the obstetrics clinics of Gazi Yasargil Training and Research Hospital and Dicl ¸ e University Hospital between July 2017 and February 2018. Patients were divided into three groups: a Reiki group, a back massage group, and a control group. Each group comprised 34 patients. Reiki or back massage was applied to patients in the respective non-control groups for 20 min once a day. Data were collected using a patient information form, the “Numeric Pain Rating Scale,” and the “Vital Signs and Postoperative Analgesic Follow-up Form.” Results: Statistically significant differences in pain intensity and analgesic use were observed between the women in the Reiki group and the women in the back massage and control groups (p < 0.001). Significant differences in vital signs were observed between the groups before and after their respective procedures; in the Reiki group, they tended to decrease, while in the back massage and control groups, they tended to increase. Conclusion: This study’s findings confirmed that pain, analgesic use, and vital signs decreased after Reiki among women who had undergone an abdominal hysterectomy
Citation - WoS: 1
Association of Gla-Rich Protein (GRP) With Inflammatory Markers in Critically Ill Patients: A Cross-Sectional Observational Study
(MDPI, 2025) Eygi, Elif; Bayrakci, Sinem; Bayrakci, Onur; Ayhan, Nazire Ates; Atlas, Ahmet; Kilinc, Metin; Dokuyucu, Recep
Objectives: Gla-rich protein (GRP), a vitamin K-dependent protein, has been increasingly recognized for its dual role in modulating inflammation and inhibiting pathological calcification. Despite its emerging importance in chronic conditions, limited evidence exists regarding its behavior during acute critical illness. This study aimed to investigate the association between GRP, systemic inflammatory markers, oxidative stress (via total thiol oxidation-reduction ratio, TORR), and calcium metabolism in critically ill patients. Materials and Methods: This cross-sectional observational study included 93 critically ill patients admitted to the intensive care unit (ICU) and 60 age- and sex-matched non-critically ill volunteers. Serum GRP levels were measured using ELISA. Other biomarkers including TORR, C-reactive protein (CRP), procalcitonin (PCT), white blood cell count (WBC), immature granulocytes (IGs), and serum calcium were also analyzed. Pearson's correlation, multivariate linear regression, and ROC analysis were performed to assess the relationships among GRP and biochemical markers, as well as their capacity to differentiate ICU patients from controls. Results: GRP, TORR, CRP, PCT, WBC, IGs, and ferritin levels were significantly elevated in ICU patients compared to the control group, whereas serum calcium levels were markedly reduced (all p < 0.05). GRP levels demonstrated moderate positive correlations with WBC (r = 0.47), neutrophils (r = 0.51), TORR (r = 0.42), CRP (r = 0.30), and IGs (r = 0.46), and a strong negative correlation with calcium (r = -0.63). In multivariate regression, TORR, CRP, WBC, IGs, PCT, and calcium levels showed significant correlations with GRP levels in univariate analysis. ROC analysis revealed that CRP had the highest discriminatory power (AUC = 0.88; 95% CI: 0.82-0.94), followed by TORR (AUC = 0.79; 95% CI: 0.71-0.86), GRP (AUC = 0.76; 95% CI: 0.68-0.84), and IGs (AUC = 0.77; 95% CI: 0.69-0.85), for distinguishing ICU patients from non-critically ill individuals. Conclusions: Our findings demonstrated that GRP is significantly associated with systemic inflammation, oxidative stress, and calcium metabolism disturbances in critically ill patients. The combined evaluation of GRP and TORR may enhance the understanding of inflammatory and oxidative mechanisms in acute critical illness. Although this study did not assess patient outcomes, these biomarkers could serve as promising candidates for future prognostic research in ICU settings.
Citation - WoS: 10
Citation - Scopus: 10
Synthesis and biological evaluation of new aza-acyclic nucleosides and their hydrogen complexes from indole
(SpringerLink, 2022) Alhilal, Suzan; Alhilal, Mohammad; Gomha, Sobhi M.; Ouf, Salama A.
Three novel aza-acyclic nucleosides and two hydrogen complexes were isolated by flash chromatography after being produced in a reaction between indole and dibenzosulfonyl diethylamine (which had previously been prepared) in the presence of sodium and absolute ethanol as a basic catalyst. Structures of new compounds and complexes were determined by 1D-NMR: 1H NMR, 13C NMR, DEPT-135, 2D-NMR: COSY, HMQC, HSQC, HMBC, IR, and MS spectroscopy. The synthesized compounds were evaluated against a wide range of microorganisms, including Gram-positive and Gram-negative bacteria as well as fungal strains. These compounds showed good biological activity.
Citation - WoS: 1
Citation - Scopus: 1
Morphological, Physiological, Molecular, and Pathogenic Insights Into the Characterization of Phytophthora Polonica From a Novel Host, Hazelnut (Corylus Avellana)
(Academic Press Ltd - Elsevier Science Ltd, 2024) Turkkan, Muharrem; Ozer, Goksel; Dervis, Sibel
Hazelnuts, constituting a significant global crop, hold paramount importance in Turkiye, contributing to approximately 71.14 % of the world's hazelnut cultivation area. In the summer of 2023, hazelnut trees in two orchards situated in the Altinordu district of Ordu province, within the Black Sea region of Turkiye, the largest producer and exporter of hazelnuts, exhibited symptoms of decline associated with root rot. Phytophthora sp. was consistently isolated from necrotic taproots, initiating an in-depth study to discern the causal agent behind the observed hazelnut decline. The species was identified as P. polonica by its distinctive morphological traits, including homothallic characteristics, amphigynous or paragynous antheridia, long nonbranching sporangiophores, and nonpapillate sporangia with internal proliferation. Multiple genetic markers (ITS, tub2, and COI) facilitated a clear differentiation of P. polonica from other Phytophthora species within Clade 9, supporting its classification within Subclade 9b. This investigation also evaluated the impact of diverse nutrient media (CA, V8A, and CMA), temperatures, and pH levels on the mycelial growth of P. polonica HPp-1 and HPp-2 isolates. The optimal conditions for maximal mycelial growth were determined through the D-optimal design of the Response Surface Method, revealing the significant influence of all factors on mycelial growth. The identified optimal conditions were at 26.09 degrees C, pH 5.12, with CMA as the nutrient medium. Validation experiments conducted under these optimal conditions unveiled mycelial growth of 7.24 +/- 0.15 mm day(-1) and 6.81 +/- 0.09 mm day(-1) for P. polonica HPp-1 and HPp-2 isolates, respectively, with an error of less than 5 %. Pathogenicity assessments confirmed P. polonica's virulence on hazelnuts, with distinct lesion development observed in twig inoculation, cut stem segments, and foliar tests. While no statistically significant difference was noted in lesion areas between HPp-1 and HPp-2 isolates in twig and stem segment assays, a statistical difference in leaf lesion areas (19.96 +/- 2.04 cm(2) and 9.16 +/- 3.43 cm(2)) emerged in foliar tests after only a 5-day incubation period, indicating their high susceptibility to the pathogen. This study is the first to report P. polonica as a hazelnut pathogen in Turkiye and around the world, highlighting the previously non-existent threat of Phytophthora root rot in hazelnuts, given the substantial lack of scientifically documented cases related to hazelnut root rot diseases. The quadratic model design employed in physiological analyses is reliable for optimizing mycelial growth and can serve as a guiding framework for similar investigations.
Citation - WoS: 2
Citation - Scopus: 2
Pollen and Seed Morphology as Taxonomic Markers in Verbascum Taxa Based on Herbarium Specimens of MARIUM
(MDPI, 2024) Kilic, Fatma Mungan
Herbaria are vital resources of biodiversity education and conservation. They contain significant dried collections and botanical data of plant species that are useful for taxonomy, systematics, and plant-based applied research applications. Verbascum L. is the largest genus within the Scrophulariaceae family globally. However, the high morphological diversity within the genus poses significant challenges for accurate species delimitation. This study investigated the pollen and seed morphology of seven distinct Verbascum groups (comprising 10 taxa, including three endemics) from southeastern Anatolia using scanning electron microscopy (SEM). SEM analyses revealed that all examined taxa possessed tricolporate pollen apertures, with pollen shapes varying between prolate spheroidal and oblate spheroidal. Seeds exhibited a light brown to dark brown color, with a prismatic oblong shape and alveolate surface. The seed coat ornamentation consisted of irregular polygonal cells, densely covered with distinct vesicles. Findings demonstrate significant morphological distinctions in both pollen and seed characteristics, suggesting their utility in taxonomic discrimination within Verbascum groups. Notably, the detailed micromorphology revealed by SEM proved to be particularly valuable for classifying these taxa. These results contribute the understanding of the taxonomic diversity within Verbascum and highlight the crucial role of SEM in uncovering microstructural details for accurate species identification.

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