Mardin Artuklu Üniversitesi Kurumsal Akademik Arşivi

DSpace@Artuklu, Mardin Artuklu Üniversitesi tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor, araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve yayınların etkisini artırmak için telif haklarına uygun olarak Açık Erişime sunar.

 

Güncel Gönderiler

Öğe
Can Serum Biomarker Values from Second-Trimester Aneuploidy Screening Predict the development of Retinopathy of Prematurity in Premature Infants?
(Kare Publishing, 2024) Sabancı, Şenol; Küçük, Mehmet Fatih; Savaş, Hasan Basri; Süren, Elçin; Erol, Muhammet Kazım; Yavuz, And; Sipahioğlu, Haydar
Objectives: This study aimed to evaluate serum biomarker values measured during second-trimester aneuploidy screening in terms of their predictive ability for the development of retinopathy of prematurity (ROP) in premature infants. Methods: This retrospective cohort study evaluated the data of 1985 idiopathic premature infants who underwent ROP screening from 2016 to 2022. The infants were divided into two groups according to the presence of ROP, and those with ROP were further evaluated in two subgroups based on the presence of proliferation. Comparisons were made concerning the serum multiple of the median values of unconjugated estriol (uE3), human chorionic gonadotropin (hCG), and alpha-fetoprotein (AFP) among aneuploidy screening biomarkers. Results: While 1628 premature infants were in the non-ROP group, 357 were in the ROP group. Of the infants with ROP, 72 were in the proliferative ROP group and 285 in the non-proliferative ROP group. There was no significant difference in the multiple of the median values of the evaluated serum biomarkers (uE3, hCG, and AFP) between the ROP and non-ROP groups or between the proliferative ROP, non-proliferative ROP, and non-ROP groups. Conclusion: The multiple of the median values of second-trimester aneuploidy screening serum biomarkers were not able to predict the development of ROP in premature infants. This result may have been caused by the fact that the blood tests were taken only once and in the same weeks.
Öğe
Political discourse and semiotics
(De Gruyter Mouton, 2024) Çanakpınar, Betül; Kalelioǧlu, Murat; Günay, Veli Doǧan
In recent years, semiotics has put "life"at the center of the subject of study. There is the desire to be successful in the lifestyle and the desire to convey the right knowledge to the recipient or the correct use of practices in life. A semiotic theory developed by Jacques Fontanille recently showed that strategy can also be used in semiotic analysis. So, the way of life that Fontanille talks about is not just strategy. The process we call "lifestyle"has an order from small to large: There are basic signs, texts, objects, actants, practices, action phases, strategies, and finally lifestyle. In this study, we question the function of strategy, but generally of productive pursuit, in the analysis of political discourses. In our study, we reveal the approach of semiotics to political discourses that concern the whole world and discuss whether they are valid in every society. We emphasize political semiotics, which is used to understand the general structure of political discourses, and show the general functioning of political discourses with Greimas' Actantial Model. We conclude that politicians can influence target audiences by using various methods and discourse strategies.
Öğe
Synthesis and biological properties of axially bis − (3,4,5-trimethoxybenzyloxy) phthalocyaninato silicon (IV)
(Elsevier, 2024) Güngördü Solgun, Derya; Özdemir, Sadin; Dündar, Abdurahman; Ağırtaş, Mehmet Salih
In this study, bis − (3,4,5-trimethoxybenzyloxy) phthalocyaninato silicon (IV) was obtained from the reaction of 3,4,5-trimethoxybenzyl alcohol with SiPcCl2. This phthalocyanine was characterized using 1H NMR, FTIR, UV–vis and mass spectra. 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging, antidiabetic, deoxyribonucleic acid (DNA) cutting, biofilm inhibition, anti-microbial and antimicrobial photodynamic therapy (aPDT) activities of newly synthesized bis − (3,4,5-trimethoxybenzyloxy) phthalocyaninato silicon (IV) molecule were studied. The best activities were 41.58 % at 100 mg/L for antioxidant and 41.66 % for antidiabetic at 400 mg/L concentration. The molecule degraded the biofilm matrix formed by Pseudomonas aeruginosa and Staphylococcus aureus as 78.61 % and 89.26 %, at 50 mg/L concentration, respectively. It was observed that E. coli, which was used as a model microorganism, was inhibited at a level close to 100 % even at the lowest concentration of 50 mg/L. While double strand break was observed at 50 mg/L DNA cutting activity, it was determined that DNA was reduced to nucleotides at 100 and 200 mg/L. The Pc also displayed effective antimicrobial and aPDT abilities against pathogens. With the application of aPDT, the effectiveness of antimicrobial activity increased 2 to 4 times. These increase rates are very important. The main conclusion of the study was that the newly synthesized compound exhibited various effective biological activities such as effective antioxidant, antidiabetic, DNA cleavage, antimicrobial, aPDT, biofilm inhibition and microbial cell viability inhibition.
Öğe
Neoscytalidium dimidiatum: A newly identified postharvest pathogen of pears and its implications for pome fruits
(John Wiley and Sons Inc, 2024) Derviş, Sibel; Zholdoshbekova, Sezim; Güler Güney, İnci; Özer, Göksel
Türkiye is a prominent contributor to pear and diverse pome fruit production. Pear fruit with unusual brown to black spots and rot symptoms observed in public marketplaces in Mardin province have raised concerns regarding postharvest fruit health. The consistent isolation of a fungus from these fruits revealed morphological features indicative of Neoscytalidium dimidiatum. Phylogenetic confirmation of its identity ensued through BLASTn searches targeting, the internal transcribed spacer (ITS) of ribosomal DNA, the partial translation elongation factor 1-alpha gene (tef1), and the partial β-tubulin gene (tub2). Pathogenicity evaluations were conducted on common pome fruits, namely pears, apples, and quinces, unveiling the susceptibility of all examined fruits to postharvest infection by this emergent pathogen. Furthermore, an investigation was carried out to discern the pathogen's response to varying temperature ranges on pear fruits, revealing that the most pronounced lesions occurred at 30°C, followed by 25°C, 35°C, and 20°C. Conversely, no lesion development was observed at 10°C, 15°C, or 40°C. To the best of our knowledge, this study represents the first report of N. dimidiatum as the etiological agent responsible for postharvest rot in pear fruit. The implications of these findings highlight the potential threat posed by this pathogen to pome fruits postharvest, especially in regions where cold storage facilities are not widely utilized, warranting increased vigilance and preventive measures.
Öğe
Determination of zinc in dried nuts by slotted quartz tube-flame atomic absorption spectrometry (SQT-FAAS) with citric acid-coated magnetic nanoparticle (CAMNP) based solid phase extraction (SPE)
(Taylor and Francis, 2024) Umaz, Kader; Umaz, Adil; Aydın, Işıl; Aydın, Fırat
This study reports a sensitive method for trace zinc using slotted quartz tube-flame atomic absorption spectrometry (SQT-FAAS) with citric acid-coated magnetic nanoparticle-solid phase extraction (CAMNP-SPE). To increase the efficiency, we univariately optimized the pH, buffer volume, CAMNP mass, eluent concentration and volume, mixing type and time, temperature, and interaction time. The study identified the limits of detection and quantification values for CAMNP-SPE-SQT-FAAS under the specified optimum conditions to be 12.30 and 41.00 μg L−1, respectively. The newly developed method improved the detection power of traditional FAAS by 13.25 times. The findings of this study report a sensitive and accurate method to determine trace zinc in complex matrices.