Browsing by Author "Sahiner A."

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    Epidemiological, Clinical, and Laboratory Features of Children With COVID-19 in Turkey
    (Frontiers Media S.A., 2021) Karbuz A.; Akkoc G.; Bedir Demirdag T.; Yilmaz Ciftdogan D.; Ozer A.; Cakir D.; Hancerli Torun S.; Kepenekli E.; Erat T.; Dalgic N.; Ilbay S.; Karaaslan A.; Erdeniz E.H.; Aygun F.D.; Bozdemir S.E.; Hatipoglu N.; Emiroglu M.; Sahbudak Bal Z.; Ciftci E.; Bayhan G.I.; Gayretli Aydin Z.G.; Ocal Demir S.; Kilic O.; Hacimustafaoglu M.; Sener Okur D.; Sen S.; Yahsi A.; Akturk H.; Cetin B.; Sutcu M.; Kara M.; Uygun H.; Tural Kara T.; Korukluoglu G.; Akgun O.; Üstündağ G.; Demir Mis M.; Sali E.; Kaba O.; Yakut N.; Kılıc O.; Kanik M.K.; Cetin C.; Dursun A.; Cicek M.; Kockuzu E.; Sevketoglu E.; Alkan G.; Guner Ozenen G.; İnce E.; Baydar Z.; Ozkaya A.K.; Ovali H.F.; Tekeli S.; Celebi S.; Cubukcu B.; Bal A.; Khalilova F.; Kose M.; Hatipoglu H.U.; Dalkiran T.; Turgut M.; Basak Altas A.; Selcuk Duru H.N.; Aksay A.; Saglam S.; Sari Yanartas M.; Ergenc Z.; Akin Y.; Duzenli Kar Y.; Sahin S.; Tuteroz S.K.; Bilen N.M.; Ozdemir H.; Senoglu M.C.; Pariltan Kucukalioglu B.; Besli G.E.; Kara Y.; Turan C.; Selbest Demirtas B.; Celikyurt A.; Cosgun Y.; Elevli M.; Sahin A.; Bahtiyar Oguz S.; Somer A.; Karadag B.; Demirhan R.; Turk Dagi H.; Kurugol Z.; Taskin E.C.; Sahiner A.; Yesil E.; Ekemen Keles Y.; Sarikaya R.; Erdem Eralp E.; Ozkinay F.; Konca H.K.; Yilmaz S.; Gokdemir Y.; Arga G.; Ozen S.; Coksuer F.; Vatansever G.; Tezer H.; Kara A.
    Objectives: The aim of this study is to identify the epidemiological, clinical, and laboratory features of coronavirus disease 2019 (COVID-19) in children. Methods: A retrospective study was conducted by pediatric infectious disease specialists from 32 different hospitals from all over Turkey by case record forms. Pediatric cases who were diagnosed as COVID-19 between March 16, 2020, and June 15, 2020 were included. Case characteristics including age, sex, dates of disease onset and diagnosis, family, and contact information were recorded. Clinical data, including the duration and severity of symptoms, were also collected. Laboratory parameters like biochemical tests and complete blood count, chest X-ray, and chest computed tomography (CT) were determined. Results: There were 1,156 confirmed pediatric COVID-19 cases. In total, male cases constituted 50.3% (n = 582) and females constituted 49.7% (n = 574). The median age of the confirmed cases was 10.75 years (4.5–14.6). Of the total cases, 90 were younger than 1 year of age (7.8%), 108 were 1–3 years of age (9.3%), 148 were 3–6 years of age (12.8%), 298 were 6–12 years of age (25.8%), 233 were 12–15 years of age (20.2%), and 268 cases were older than 15 years of age (23.2%). The most common symptom of the patients at the first visit was fever (50.4%) (n = 583) for a median of 2 days (IQR: 1–3 days). Fever was median at 38.4°C (38.0–38.7°C). The second most common symptom was cough (n = 543, 46.9%). The other common symptoms were sore throat (n = 143, 12.4%), myalgia (n = 141, 12.2%), dyspnea (n = 118, 10.2%), diarrhea (n = 112, 9.7%), stomachache (n = 71, 6.1%), and nasal discharge (n = 63, 5.4%). When patients were classified according to disease severity, 263 (22.7%) patients were asymptomatic, 668 (57.7%) patients had mild disease, 209 (18.1%) had moderate disease, and 16 (1.5%) cases had severe disease. One hundred and forty-nine (12.9%) cases had underlying diseases among the total cases; 56% of the patients who had severe disease had an underlying condition (p < 0.01). The need for hospitalization did not differ between patients who had an underlying condition and those who do not have (p = 0.38), but the need for intensive care was higher in patients who had an underlying condition (p < 0.01). Forty-seven (31.5%) of the cases having underlying conditions had asthma or lung disease (38 of them had asthma). Conclusions: To the best of our knowledge, this is one of the largest pediatric data about confirmed COVID-19 cases. Children from all ages appear to be susceptible to COVID-19, and there is a significant difference in symptomatology and laboratory findings by means of age distribution. © Copyright © 2021 Karbuz.
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    Effects of Green Extraction Methods on Antioxidant and Antimicrobial Properties of Artichoke (Cynara scolymus L.) Leaves
    (University of Zagreb, 2024) Turksever C.; Gurel D.B.; Sahiner A.; Çağındı O.; Esmer O.K.
    Research background. Artichoke leaves, an important waste product of the food industry, have an important antioxidant and antimicrobial capacity. Although there are several studies in the literature to determine their antioxidant and antimicrobial activity, a comparison of green extraction technologies including microwave, ultrasound probe and ultrasound bath methods in relation to the maceration technique has not been performed. Also, several parameters such as the extraction temperature, power, extraction mode and extraction time are important parameters for obtaining targeted compounds in the highest amount. For this reason, we aimed to compare various extraction methods including microwave-assisted extraction, ultrasound-assisted extraction with probe, ultrasound-assisted extraction in a water bath and maceration in terms of extraction parameters for obtaining bioactive compounds from artichoke leaves. Experimental approach. M icrowave-assisted extraction at two different power values, ultrasound-assisted extraction with probe in continuous or pulsed mode with two different extraction times each, ultrasound-assisted extraction in a water bath at two different power values with two different extraction times each and maceration with two different times were used for the extraction. The extraction temperature is an important parameter affecting the thermal degradation of bioactive compounds. We used a constant extraction temperature of 50 °C. Total phenolic and total flavonoid content, antioxidant capacity, phenolic compound profile analysis by LC-QTOF-MS and antimicrobial activity by agar diffusion and broth microdilution methods were determined. Results and conclusions. T he bioactive compounds were found to be significantly affected by the parameters used in each extraction method. The microwave-assisted extraction method was more efficient than the other extraction methods at both power values. This method also required the shortest extraction time. The ultrasound-assisted probe extraction method was the second most efficient method. The type of process, continuous or pulsed, did not affect the results, but shortening the extraction time led to lower results. A longer extraction time of the ultrasound-assisted extraction in a water bath method led to better results, similar to the ultrasound-assisted probe extraction, regardless of the used power. The extracts were highly effective against many opportunistic and pathogenic microorganisms. Novelty and scientific contribution. This study provides valuable insights into the extraction parameters of different extraction methods to obtain bioactive compounds from artichoke leaves, which could have potential applications in the food and pharmaceutical industries. © 2024, University of Zagreb. All rights reserved.