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The C-V characteristics of TiO2/p-Si/Ag, GNR doped TiO2/p-Si/Ag and MWCNT doped TiO2/p-Si/Ag heterojunction devices
No full textThe TiO2/p-Si/Ag, graphene (GNR) doped TiO2/p-Si/Ag and multi-walled carbon nanotube (MWCNT) doped TiO2/p-Si/Ag heterojunction devices were fabricated by electrospinning technique at same conditions. Their structural, morphological properties, thermal analyses (TGA), and capacitance voltage characteristics were studied and compared. The undoped, GNR and MWCNT doped TiO2 structures obtained successfully according to XRD measurements. Morphological properties of the undoped, GNR and MWCNT doped TiO2 composite structures have rod or ribbon like structures. The TGA result confirmed the GNR and MWCNT doped TiO2 structures. The C-V and G-V measurements were employed for electrical characterization of the TiO2/p-Si/Ag, GNR doped TiO2/p-Si/Ag and MWCNT doped TiO2/p-Si/Ag devices for various frequencies at room temperatures. The results imparted that the capacitance and conductance behaviors of all devices are strong functions of the frequency and voltage. The electrical parameters were calculated from C-2-V plots of the heterojunction devices and compared for three devices. The transient photocapacitance plots revealed that the devices can be employed for optical communication applications. © 2020 The Physical Society of the Republic of China (Taiwan
Toxicological effects of some antiparasitic drugs on equine liver glutathione S-Transferase enzyme activity
No full textPubMed: 31887670Benzimidazoles are antiparasitic drugs having an extensive application field like agriculture, medicine, and especially in veterinary medicine. In this study, we report the effect of some benzimidazole drugs such as ricobendazole (RBZ), thiabendazole (TBZ), albendazole (ALBA) and oxfendazole (OFZ) on glutathione s-transferase (GST) enzyme activity. The kinetics studies, IC50 and Ki values of the tested drugs on GSTs enzyme activity were investigated. The obtained ranking of IC50 values were found to be approximately RBZ (53.31 µM, r2: 0.9778) < OFZ (57.75 µM, r2: 0.9630) < ALBA (63.00 µM, r2: 0.9443) < TBZ (69.30 µM, r2: 0.9491). And the obtained ranking of Ki values of the tested drugs (RBZ, TBZ, ALBA, and OFZ) for GSTs enzyme activity was found to be approximately 26.37 ± 2.96, 44.01 ± 5.74, 39.82 ± 3.98 and 30.14 ± 3.03 µM, respectively. Experimental results showed that tested the benzimidazoles drugs have some significant inhibitory effect on GSTs enzyme activity. And also, it was determined that RBZ, ALBA, OFZ are competitive inhibition, but TBZ is non-competitive inhibitors on GSTs enzyme activity. RBZ drug showed the best inhibitory effect with the lowest Ki value. © 2019 Elsevier B.V
Preparation of bio-electrodes via Langmuir-Blodgett technique for pharmaceutical and waste industries and their biosensor application (vol 583, 124005, 2019)
No full textWOS: 000504350600087
Influence of some beta-lactam drugs on selected antioxidant enzyme and lipid peroxidation levels in different rat tissues
No full textWOS: 000470421900001PubMed: 31060396Antioxidant enzymes play an important role in body defense and free radical removal. Cephalosporins are beta-lactam antibiotics. In this work, the effects of cefazolin, cefuroxime and cefoperazone which are cephalosporins on some selected antioxidant enzyme and levels of malondialdehyde (MDA) as lipid peroxidation product were investigated in kidney, liver, and brain tissues of albino female rats. Ninety-six albino rats were randomly divided into 16 groups of equal number (n = 6). 50 mg/kg cefazolin, 25 mg/kg cefuroxime, and 100 mg/kg cefoperazone were injected intraperitoneally to the groups (5th-8th and 9th-12th, and 13th-16th groups), respectively. The changes in glutathione reductase (GR), glutathione S-transferase (GST), superoxide dismutase (SOD), peroxidase (POD), and glutathione peroxidase (GSH-Px) levels were studied in each time point group and a time-dependent manner (at the 1st, 3rd, 5th and 7th hour). In addition, MDA levels were examined in all the tissues. The drugs evaluated in this study had different effects on the same enzyme in different tissues depending on time. MDA levels especially in cefazolin and cefoperazone experiments were lower in all the tissues; however, MDA levels were higher in brain and kidney tissues in the cefuroxime groups in a time-dependent manner (p < 0.05). These results revealed the complex effects of the tested drugs on different tissues at different time points. Therefore, the dose and use of these drugs should be adjusted correctly.Scientific Research Fund of Igdir University [2018-SBE-A11]This study was supported by Scientific Research Fund of Igdir University. Project Number: 2018-SBE-A11
Examination of Different Reading Strategies with Eye Tracking Measures in Paragraph Questions
No full textWOS: 000508544900006This study aims at investigating the effects of two different test-taking strategies on reading achievement, dwell time, fixation counts and number of regressions on area of interests (AOIs) of the multiple choice reading comprehension questions with different type and difficulty levels. In this true experimental study, 28 subjects are randomly assigned into two groups. While subjects in stem first strategy (S-FS) group read the question stem first, subjects in paragraph first strategy group (P-FS) read paragraph first. Results of this study show that dwell time, fixation counts, and number of regressions on question stem AOIs in the S-FS group are significantly higher than the P-FS group. As a result, contrary to the common recommendations in practice, reading the question stem first provides no advantage in terms of reading achievement and dwell time as expected. Moreover, the S-FS significantly increases dwell time, fixation counts, and number of regressions on question stem AOIs
Ternary CuCo2S4 Thiospinel Nanocrystal-Coated Photodiode with Improved Photoresponsivity and Acceptance Angles for Optoelectronic Applications
No full textTernary-structured thiospinels have attracted great attention in recent years for energy applications due to their attractive characteristics such as simple production, earth-abundant components and non-toxic nature. In this work, copper cobalt sulfide (CuCo2S4 or carrollite) thiospinel nanocrystals were synthesized by a hot-injection method, and detailed electrical and optoelectronic characterizations were performed in a Schottky device. The synthesized nanocrystals were used as an interfacial layer between the Au metal and p-Si semiconductor to obtain an Au/CuCo2S4/p-Si device. The structural and morphological characterizations confirmed the crystallinity, nanostructure and composition of the CuCo2S4 nanocrystals. The I–V and C–V measurements were employed to characterize the Au/CuCo2S4/p-Si device for various illumination intensities. The obtained device exhibited good rectifying and photodiode properties as well as good photocapacitance. The Au/CuCo2S4/p-Si device can be used and improved for optoelectronic applications. © 2019, The Minerals, Metals & Materials Society.217M212This work is supported by TUBITAK (The Scientific and Technological Research Council of Turkey) under Project Number 217M212. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations
Biological synthesis of silver nanoparticles using Rheum ribes and evaluation of their anticarcinogenic and antimicrobial potential: A novel approach in phytonanotechnology
No full textPubMed: 31791838This paper reports the anticarcinogenic and antimicrobial properties of silver nanoparticles (Ag NPs) obtained by green synthesis using the extract of Rheum ribes (R. ribes), a medicinal plant. For the synthesis of Ag NPs, the ethanolic extracts of R. ribes were used as a reducing as well as the stabilizing agent. For the characterization of Ag NPs, advanced analytical methods such as transmission electron microscopy (TEM), X-Ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and UV–vis spectrophotometry were performed. The synthesized Ag NPs obtained from R. ribes were evaluated as a cytotoxic agent against MDA-MB-231 breast carcinoma cell line. The IC50 values of the nanoparticles were ranged from 165 to 99 µg/mL against MDA-MB 231 cell line for 24 h and 48 h, respectively. The results show that the use of Ag NPs at low concentrations show the toxic effect in the cancer cells. In addition, the results of experiments on gram-positive (Staphylococcus aureus (S. aureus), Methicillin-resistant Staphylococcus aureus (MRSA) and Bacillus subtilis (B. subtilis)) and gram-negative (Escherichia coli (E. coli)) bacteria showed that the Ag NPs had high antimicrobial activity. The results suggest that Ag NPs can be developed as potential anticancer and antibacterial agents. © 2019 Elsevier B.V
Comparative Analysis of Cost and Profitability in the Irrigated and Non-irrigated Chestnut Farming: Case of Aydin Province, Turkey [Vergleichende Kosten- und Rentabilitätsanalyse der Kastanienproduktion mit und ohne Zusatzbewässerung in der türkischen Provinz Aydin]
No full textThe objective of this paper was to examine comparatively the cost and profitability of chestnut farming in the irrigated and non-irrigated farms in Aydin Province. The data of this study was collected with face to face surveys from 99 chestnut farms using the stratified sampling method. Partial budgeting analysis was applied to 27 irrigated and 72 non-irrigated farms in order to explain the cost and profitability of chestnut production. The results of the study highlighted that the average production cost of chestnut per kilogram was US 1.21 in the non-irrigated farms. The chief element of cost was labor, and the share of labor in the total cost was 70.77% in the irrigated farms and 69.24% in the non-irrigated ones. The gross production value per decare and per tree were US 47.01 in the irrigated farms, while they were US 39.77 in the non-irrigated farms, respectively. In the irrigated farms, the gross profit and net profit were US 158.14, whereas in the non-irrigated farms, they were US 95.92, respectively. The rate of return was 1.60 in the irrigated farms and 1.55 in the non-irrigated ones. The results of the study confirmed that the chestnut production cost of the farms could be lessened via utilization of irrigation and the effective use of inputs particularly labor. © 2020, Springer-Verlag GmbH Deutschland, ein Teil von Springer Nature
Corrigendum to “Preparation of bio-electrodes via Langmuir-Blodgett technique for pharmaceutical and waste industries and their biosensor application” [Colloid Surface A: Physicochem. Eng. Aspects, 583 (2019) 124005](S0927775719309951)(10.1016/j.colsurfa.2019.124005)
No full textThe authors regret “The authors express gratitude to Dr. Kader Dağcı Kıranşan, from the Department of Chemistry, Atatürk University for her support in the studies given in Table 3, Figures 4 and 5”. The authors would like to apologise for any inconvenience caused. © 2019 Elsevier B.V.The authors express gratitude to Dr. Kader Da?c? K?ran?an, from the Department of Chemistry, Atat?rk University for her support in the studies given in Table 3, Figures 4 and 5. The authors would like to apologize for any inconvenience caused
Physicochemical characteristics of wild and cultivated apricots (Prunus armeniaca L.) from Aras valley in Turkey
No full textIn east Anatolia region in Turkey, there are special microclimates, which famous for its fruit production. One of the most important microclimates in the region is Aras valley. The major fruit in the valley is apricot, which grown both cultivated and wild forms. This study aimed to assess some important fruit morphological and biochemical characteristics of 26 wild apricots and cv. Aprikoz grown in Kagizman district in Aras valley. Harvest date, tree growth habit, fruit weight, fruit shape, fruit firmness, fruit color, flesh/seed ratio, aroma, kernel taste, soluble solid content, titratable acidity, maturity index, vitamin C, total phenolic, total carotenoid and antioxidant capacity were determined. The wild grown apricots exhibited a wide variation on most of the fruit morphological and biochemical characteristics. Harvest date, fruit shape, fruit weight, fruit firmness and fruit color were the most distinct morphological characteristics of wild grown apricots. Harvest dates and fruit weight were found between 02 July (KA18) and 06 August (KA13); 16.28 g (KA6) and 33.14 g (KA2) among wild grown apricots, respectively. The main cultivar cv. Aprikoz harvested at 04 July and had 38.67 g fruit weight. The wild apricots had flesh/seed ratio between 8.41 (KA21) and 12.25 (KA10) while cv. Aprikoz had 11.69 flesh/seed ratio. Total antioxidant capacity, total carotenoid and total phenolic content were the highest in most of wild apricot fruits than cv. Aprikoz. Our results showed that there is potential for promoting wild apricot fruit from specific geographical regions because they contained elevated concentrations of antioxidant polyphenolic compounds. © 2020, Springer Nature B.V