Teknik Bilimler Meslek Yüksekokulu Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.13091/1629

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Analysis of the Studies Done on Laboratories in Turkey
(2020) Yener Dündar; Köklü, Niğmet; Yamaç Ramazan Ziya; Yalçın Seher
The aim of this study is to determine the trend of studies in the laboratory and put the current situation in Turkey. For this purpose, document analysis technique, one of the qualitative research methods, was used in the research. The data group of the research consists of thesis studies on laboratories in our country between 1999-2017. Theses in the fields of science, physics, chemistry, and biology have been determined and themes and sub-themes have been created through the keywords of these theses. Then, frequency tables were created according to the themes and sub-themes created. According to the findings obtained, it was seen that the traditional laboratory approach and inquiry-based laboratory approaches are compared in the studies. It was determined that the studies were done on physics subjects and it was determined that complementary measurement and evaluation studies performed for performance evaluation were used in very fewnumbers. In addition, it was concluded that the keywords did not give enough information about the studies. In this context, it can be suggested to examine the effectiveness of these approaches according to each other and experiment types by examining theapproaches in which students can be more active in laboratories.
Citation - Scopus: 3
Anti-Colorectal Cancer Effects of Medicinal Plants: Euphorbia Helioscopia, Ferula Elaeochytris, and Sideritis Albiflora
(2021) Deveci, Ebru; Çayan, Gülsen Tel; Karakurt, Serdar; Duru, Mehmet Emin
Phytochemicals, extracts, and mixtures obtained from plants have been offered as an option for cancer treatment and prevention for modern drug discovery in recent years. For this purpose, in this study, anti-colorectal cancer effects of the hexane, acetone, methanol, and water extracts obtained by sequential extraction from Euphorbia helioscopia L., Ferula elaeochytris Korovin, and Sideritis albiflora Hub.-Mor. on DLD-1 cell line were investigated in vitro by using Alamar blue assay. Dosedependent inhibition was detected in the viability of DLD-1 cell line. In all three plants species, E. helioscopia (IC50: 140.83±0.31 µg/mL), F. elaeochytris (IC50: 67.93±0.12 µg/mL), and S. albiflora (IC50: 85.12±0.10 µg/mL) methanol extracts showed higher anti-colorectal effects on DLD-1 cell line compared to other extracts tested for the same species. In addition, the IC50 value of doxorubicin used as a standard was found as 6.10±0.55 µg/mL. With the results obtained, as the first report highlighting in vitro anti-colorectal cancer effects of the studied plant species on DLD-1 cell line, promising marks were obtained from the analysis of the extracts as anti-cancer sources for plant-derived drug applications.
Citation - Scopus: 11
Antioxidant, Cytotoxic, and Enzyme Inhibitory Activities of Agropyron Repens and Crataegus Monogyna Species
(2020) Deveci, Ebru; Çayan, Gülşen Tel; Karakurt, Serdar; Duru, Mehmet Emin
Objective: The aim of this study was to investigate antioxidant, enzyme inhibitory and cytotoxic activities of Agropyron repens and Crataegus monogyna methanol extracts with total phenolic and flavonoid contents. Materials and Methods: Total phenolic and flavonoid contents of A. repens and C. monogyna methanol extracts were measured according to Folin Ciocalteu and aluminum nitrate methods, respectively. Antioxidant and enzyme inhibitory activities of the methanol extracts were tested spectrophotometrically. Also, cytotoxic activities of the methanol extracts against DLD-1 and CCD-18Co were investigated by using Alamar Blue assay. Results: C. monogyna methanol extract with the highest total phenolic and flavonoid contents (68.13±0.34 µg GAEs/mg extract and 36.91±0.17 µg QEs/mg extract, respectively) had the best antioxidant activity in ?-carotene-linoleic acid ($IC_50$: 32.72±0.15 µg/mL), CUPRAC ($A_0.50$: 282.69±0.25 µg/mL), DPPH• ($IC_50$: 71.69±0.85 µg/mL), and ABTS•+ ($IC_50$: 40.43±0.55 µg/ mL) assays. A. repens methanol extract showed the highest effect against AChE (18.73±0.47 %), BChE (37.59±1.07 %), urease (89.18±0.84%), ?-glucosidase (6.71±0.23 %), whereas C. monogyna methanol extract showed the highest effect against tyrosinase (30.52±1.00%) and ?-amylase (37.24±0.06 %). Also, A. repens ($IC_50$: 57.38 µg/mL) and C. monogyna ($IC_50$: 54.04 µg/ mL) methanol extracts showed close cytotoxic activity on DLD-1. Conclusion: Antioxidant, cytotoxic, and enzyme inhibitory activities of A. repens and C. monogyna methanol extracts were investigated with total phenolic and flavonoid contents in this study. The results obtained with this study strengthen the potential of the studied plants as a new source for the discovery of antioxidant, cytotoxic, and enzyme inhibitor agents.
Bağımsız Türk Cumhuriyetleri Bayraklarının Görsel İletişim Tasarım Teknikleri Açısından Analizi
(2023) Uğur, Engin; Kısa, Mustafa
Her yönü ile kardeş kabul ettiğimiz Bağımsız Türk Cumhuriyetleri, yaklaşık otuz sene önce Sovyet Sosyalist Cumhuriyetler Birliğinin dağılmasından sonra bağımsızlıklarını ilan etmişlerdir. Geçen zaman içerisinde Bağımsızlığını ilan eden Türk Cumhuriyetleri bir yandan Sovyetler birliğinin yönetim anlayışından kaynaklanan eksiklikleri, problemleri, yanlış algı ve tutumları değiştirmeye çalışırlarken diğer yandan ülkelerinin kalkınmaları için her alanda çalışmalar yapmaktadırlar. Geçmişten gelen kimlik ve değerlerine sahip çıkan bağımsız ve uygar bir ülke olma yolunda ilerlemektedirler. Bilimsel ve kültürel faaliyetlerin ışığında yapılan tüm çalışmaların gelişmiş ülkeler dikkate alındığında daha kat edilecek mesafelerin olduğu görülmektedir. Bağımsız bir ülke olmanın ilk aşaması, kendi milli ve manevi değerlerini çok iyi ifade eden marşa ve bayrağa sahip olmaktır. Bir ülkenin bayrağı ülke kimliği açısından önemli bir unsurudur. Ülke bayrağı, hem görsel açıdan hem de taşıdığı anlam açısından önemli sorumluluklara sahiptir. İşletmelerin logoları gibi zamanın değişen şartlarına göre değiştirilme veya revizyon şansı yoktur. Bu nedenle çok ciddi ve kapsamlı çalışmalar sonucunda hazırlanarak ülke var oldukça her zaman beğeniyle gönderdeki yerinde dalgalanmalıdır. Ülke bayrağındaki her bir görsel, yazı veya renk unsurunun derin arka planı olmalıdır. Bu nedenle ülke bayrakları diğer görsel unsurlar gibi tek düze değerlendirme kriterleri ile değerlendirilemez. Bağımsız Türk devletlerine ait bayraklar görsel iletişim kavramları çerçevesinde kişisel bakış açısı ile değerlendirilmeye çalışılmış ve analizi yapılmıştır.
Ball Throwing Machine Design To Develop Footballers’ Technical Attributes
(2021) Arslan, Cemile; Arslan, Mustafa; Yalçın, Gökhan; Kaplan, Turgut; Kahramanlı, Humar
For a football player to perform well in football, it is necessary to improve his technical and tactical skills. Improving these skills is enabled with the repetition of the same positions that the football player has the ball. The repetitions of these same positions can be performed with the aid of a machine. In this study, a football throwing machine design that can provide direction and velocity for the ball in a repeatable and controllable manner is generated for full educational evaluation. Ball loading canister on the ball throwing machine enabled to use of many balls. There are a couple of ball throwing wheels both are made of polyurethane material and have a concave surface. These wheels are mounted on a body for axial rotation on common ground. Each wheel’s rotation speed can be adjusted individually. To determine the horizontal-vertical direction of movement of the ball, two linear actuators are used. Ball’s velocity, direction, orbit, and throwing laps are controlled electronically. All controls concerning ball throwing are carried out via Delta PLC (Programmable Logic Controller) and HMI (Human Machine Interface) panel. A user interface is developed for controls made via PLC. Owing to the interface, different training plans are designed by handler or trainer via operator panel, and footballer is provided to train in various densities. To prevent toppling tripod system, and to carry easily a towing arm is used. The machine can work with an accumulator or feed directly from the grid circuit.
Beyaz Peynir, Çiğ Süt, Kıyma ve İnegöl Köftede Staphylococcus Aureus Kaynaklı İntoksikasyon Riskini Değerlendirmede Kültür ve İmmunolojik Yöntemlerin Karşılaştırılması
(2018) Telli, Nihat; Yörük, Gamze Nuray; Telli, Arife Ezgi; Cebirbay, Muhammed Ali; Sayar, Ahmet Güner
Amaç: Konya’da tüketime sunulan beyaz peynir, çiğ süt, kıyma ve İnegöl köfte örneklerinin fiziksel, kimyasal ve mikrobiyolojik kalitelerinin ortaya konması ve Staphylococcus aureus (S. aureus) kontaminasyonu ile toksin varlığının tespiti amaçlanmıştır. Gereç ve Yöntem: Araştırmada beyaz peynir (n=50), çiğ süt (n=50), kıyma (n=50) ve İnegöl köfte (n=50) olmak üzere 200 numune kullanılmıştır. Numuneler fiziksel ve kimyasal (pH, asidite ve kuru madde) ve mikrobiyolojik [toplam mezofilik aerobik bakteri (TMAB), toplam psikrofilik aerobik bakteri (TPAB), koliform, laktik asit bakterisi (LAB), S. aureus] açıdan değerlendirilmiştir. Stafilokokal enterotoksinlerin (SEs) varlığı enzymelinked fluorescent immunoassay’a (ELFA) dayalı VIDAS Staph enterotoksin kiti ile araştırılmıştır. Bulgular: Çiğ süt, beyaz peynir, kıyma ve İnegöl köftelerde ortalama pH değerleri sırasıyla, 6.53, 4.82, 5.99 ve 6.63; kuru madde değerleri % 12.51, % 37.71, % 38.97, % 49.70 ve laktik asit cinsinden asiditeleri de % 0.16, % 0.67, % 0.08 ve % 0.40 olarak bulundu. TMAB sayıları 4.53 - 9.86 log10kob/g-ml; TPAB 3.39 - 7.69 log10kob/g-ml; koliform bakteri 2.04 - 8.53 log10kob/g-ml; LAB 2.90 - 7.64 log10kob/g-ml ve S. aureus sayıları 2.61 - 6.46 log10kob/g-ml arasında bulundu. İnegöl köfte örneklerinin 1’i (% 2) ve kıyma örneklerinin 29’unda (% 58) SEs tespit edildi. Öneri: S. aureus'un tüm suşlarının SE’lerin üretiminden sorumlu olmamalarından dolayı stafilokokal gıda intoksikasyonlarının değerlendirilmesinde ve güvenli gıda üretiminde kültürel yöntemlerle birlikte SE varlığının araştırılmasının da önemli olduğu düşünülmektedir
Cam Lif Takviyeli Betonun Yangın Dayanımlarının Çeşitli Parametreler Açısından İrdelenmesi
(2019) Ali, Ali Murthada; Arslan, Musa Hakan; Altın, Mustafa
Cam lifi taze beton karışımına eklenerek betonun mekanik özellikleri iyileştirilmektedir. Literatürde cam lif takviyeli betonun (CTB) mekanik özelliklerinin tespitine yönelik çok sayıda araştırma yapılmıştır. Beton içine cam lifi eklenerek özellikle betonun eğilme ve çekme dayanımında hatırı sayılır artışlar meydana gelmekte, bu şekilde üretilmiş olan betonlar daha ince kesitli oldukları için de uygulamada tercih edilmektedirler. Betonun içine eklenen cam lifinin betonun yangın performansına olumsuz bir etki yapıp yapmadığına yönelik kapsamlı bir araştırma olmadığı için bu çalışmada dört farklı (30,60, 90 ve 120 dk) yangın sürelerine tabi tutulmuş cam lif takviyesiz beton ile CTB elemanlarının yangın sonrasındaki mekanik özelliklerindeki değişiklikler incelenmiştir. Deneysel çalışma kapsamında Ø15/30 cm silindir ve 4x4x16 cm prizmadan oluşan toplam 300 adet numune üretilmiştir. Numunelerde kullanılan 0,5,10,15 ve 20 kg/m3 oranlarındaki cam elyaf takviyeli betonların değişik sürelerde yangın sonrasındaki basınç ve üç farklı çekme (yarma, tek noktadan eğilme ve iki noktadan eğilme) dayanımı üzerindeki etkisi farklı sürelerde yangına maruz bırakılan CTB elemanları üzerinden test edilmiştir. Yangın geçirmemiş numunelerde cam lifi basınç dayanımına bir katkıda bulunmazken çekme dayanımında önemli oranlarda katkısı olmuştur. 30 dakikalık yangın sonrasında CTB numunelerin tek ve çift noktadan eğilme deneylerinden elde edilen çekme dayanımlarında yangın öncesine göre bir artış görülmüştür. Daha uzun süreli yangınlarda (60, 90 ve 120 dk) ise bu oranda bir artış meydana gelmemiştir.
Carbon Dots Applications in Electrochemical and Electrochemiluminescence Sensors: Some Examples of Pathogen Sensors
(2020) Dinç Saliha; Günhan
The ongoing worldwide pandemic of the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has revealed that simple, fast, low-cost, reliable, and portable sensor systems should be developed immediately. Electrochemical and electrochemiluminescence (ECL) based pathogen sensors are promising alternatives to conventional methods due to several advantages including in situ and fast response time, high sensitivity, low cost, being portable, easy-to-operate and simple to construct using different receptors including, antibody, enzyme, DNA, aptamer, etc. Carbon dots/graphene quantum dots have been used as labels, electrode material, ECL luminophores, electrode modification materials, amplifier, reaction catalysts to increase sensitivity and selectivity of electrochemical and ECL sensors. In this mini-review, the latest applications of carbon dots in electrochemical and ECL based sensors are summarized and some examples of pathogen sensors are given.
Citation - Scopus: 6
Chemical Composition, in Vitro Antimicrobial and Antioxidant Activities of Marine Macroalgae Codium Fragile (suringar) Hariot
(2022) Keskinkaya, Hatice Banu; Güneş, Erdoğan; Okudan, Emine Şükran; Akköz, Cengiz; Gümüş, Numan Emre; Karakurt, Serdar; Deveci, Ebru
Marine algae, which are the primary producers living in aquatic areas, are the subject of many studies due to their importance as they are eukaryotic and eutrophic organisms that play a crucial role in the pharmaceutical, cosmetic, food, fuel, and textile industries. Macroalgae are known in producing several macronutrients, micronutrients, and other important biologically active compounds (e.g. polyphenols, enzymes, and antibiotics) with potential pharmacological uses. In this research, we aimed to investigate the chemical composition, antimicrobial and antioxidant activities (with three assays), total phenolic (TPC) and flavonoid (TFC) contents of the methanol, ethanol, acetone, and water extracts of Codium fragile (Suringar) Hariot. The LC-ESI-MS/MS assessment allowed the identification of seven compounds containing gallic acid, 4-hydroxybenzaldehyde, 4-hidroxybenzoic acid, p-coumaric acid, salicylic acid, biochanin A, and diosgenin. TPC and TFC of the extracts were calculated as in the range of 10.34±0.13-64.67±0.02 µg GAEs/mg extract and 12.73±2.68-36.78±1.08 µg QEs/mg extract, respectively. All extracts of C. fragile showed antimicrobial activity against all test pathogens at different levels. The methanol, ethanol, and acetone extracts showed different levels of activity against gram-negative and gram-positive bacteria (MIC: 3.125-1.562 mg/mL). The water extract showed the highest activity in ABTS•+ (70.43±14.85%) and DPPH• (72.61±11.44%) assays while the acetone extract exhibited the best activity in CUPRAC (absorbance: 0.60±0.15) assay. The results we obtained approved that C. fragile could be valued as a natural source of bioactive agents for food preservatives and in other industrial and pharmaceutical fields.
Classification of Environmental Attitudes With Artificial Intelligence Algorithms
(2024) Köklü, Niğmet; Sulak Süleyman Alpaslan
The study aims to examine people's attitudes towards the environment. Environmental education provides the necessary awareness to effectively address environmental issues. It is stated that attitudes towards the environment are very important and negative attitudes can worsen environmental problems. For this purpose, a dataset was obtained by using a scale consisting of 37 variables to a participant group consisting of 384 people. With this dataset, attitudes towards the environment have been analyzed usingvarious classification algorithms. Logistic Regression (LR), Support Vector Machine (SVM) and Decision Tree (DT) models were used in the research. The LR, SVM, and DT models achieved 94.53%, 92.96%, and 82.55% classification success, respectively It is seen that the classification achievements of the models are at an acceptable level compared to the literature. As a result, the research sheds light on people's attitudes towards the environment through classification processes. Despite the acceptable classification achievements, alternative artificial Intelligence approaches can also be used to improve performance.
Computer Control of Z-Axis Movement in Micro Drilling Machine
(2020) Terzioğlu, Hakan; Yalçın, Gökhan; Neşeli, Süleyman
In this study, the automatic control of the feed axis is aimed to drill holes in micron diameters and precision by using a desktop drill. The control was carried out with the Visual Studio C # interface program using the feed rate, drilling depth and exit speed parameters of the drill in one axis. At the same time, the microprocessor control card enables the stepper motor of the drill to be managed and communicates with the computer. Using EEPROM memory, it is possible to work without the need of a computer whose operating parameters are stored in memory. PIC18F2550 microprocessor control board is used to control all components of the machine. In this way, both stepper motor drive and communication with computer are provided. With the designed control circuit, drilling can be performed with 3,6 degree precision. As a result of the drilling process carried out at different speeds and lengths of micron diameter (0.18-0.25µ) drill bits with the system created, it was seen that ideal drilling process could be performed according to the desired quality characteristics of the machine.
Citation - Scopus: 6
Cytotoxic Activities of Methanol Extract and Compounds of Porodaedalea Pini Against Colorectal Cancer
(2021) Deveci, Ebru; Çayan, Gülsen Tel; Karakurt, Serdar; Duru, Mehmet Emin
Porodaedalea pini is a medicinally important mushroom with antioxidant, cytotoxic, immunostimulating, antitumor, antiviral and immunomodulating activities. Therefore, in this study, P. pini methanol extract and isolated compounds from the methanol extract were tested for cytotoxic activities against DLD-1 (colorectal cancer) and CCD-18Co (human colon fibroblast cell line) by using Alamar Blue assay. Cytotoxic activity on DLD-1 was decreased in the order of P. pini methanol extract> 4-(3,4- dihydroxyphenyl)but-3-en-2-one (3)> pinoresinol (2)> ergosta-7,24(28)-dien3?-ol (1). P. pini methanol extract was determined to have the best cytotoxic activity with the lowest IC50 value on DLD-1 (IC50: 25.33±0.29 µg/mL) and the highest IC50 value on CCD-18Co (434.30±1.45 µg/mL). Within the scope of the findings, it is thought that P. pini mushroom can be used as a new and natural agent in the treatment of colorectal cancer.
A Descriptive and Comparative Analysis of the Two Turkish Translations of Pride and Prejudice by Jane Austen
(2022) Küçükbezirci, Yağmur; Parlak, Neslihan
Translation norms have an important place in descriptive translation theory and these norms concern not only the translated texts but also the society and culture to which the texts belong. Norms are related to the behaviour and choices of translators in the translation process and therefore determine translation decisions. The decisions taken in translation process as lexical choices and preferred translation strategies determine which of the translators will be closer to the source or target languages and cultures. Thus, it becomes clear which of the poles of adequacy or acceptability is closer to translated text. The concepts of 'adequacy and acceptability' have recently been associated with the concepts of 'overt translation' and 'covert translation'. In overt translation, the translator's choices are in accordance with the values of the source text and its culture and therefore the translation text is conveyed without changing the foreign-the cultural elements- given in the source text. In this context it can be claimed that the reader can obtain Information about the source text culture. On the other hand, in covert translation, the cultural elements given in the source text are domesticated and presented to the reader with expressions familiar to the reader. In this context, the translator's choices prioritize the reader and the values of target culture. This study aims to provide a descriptive analysis of the two translation versions of Jane Austen's Pride and Prejudice, in the light of Gideon Toury's descriptive approach to the translation studies. Through making a comparative analysis between the source text and the two translation versions (target texts) via selecting sentences randomly from the source text and comparing them with the target texts in terms of lexical choice, revealing a comparative and objective analysis in terms of their equivalences is the main focus of this study without searching for translation errors in comparison to the source text. In order to present a descriptive analysis, Gideon Toury's norms will be used as a guide and on a macro level, Toury's equivalence theory; “adequacy or acceptability” and the terms overt and covert translation will be used for the comparison of the target texts in terms of word level
Designing a System That Records the Sleeping Position Data of Sleep Apnea Patients
(2022) Vatansev, Hülya; Vatansev, Hüsamettin; Gölcük, Adem; Taşdemir, Şakir; Balcı, Mehmet; Küçüktürk, Serkan
Sleeping positions have a significant impact on exposure of apnea patients to sleep apnea. In this study, the sleeping position of the patient was read with the STM microcontroller by using the body position sensor (SleepSense 1/8" Plug DC Body Position Sensor Kit) produced by the sleep sense company. This sensor produces results with analog signals between 0-2V. This analog signal was read using the ADC feature of the microcontroller. This signal read by the microcontroller was sent to the computer via the USB port. The C# software prepared on the computer reads the data from the microcontroller and saves this data and the arrival time of the data to the bit TXT file. The data in this TXT file is ready to be evaluated by signal processing methods. These data, together with other data obtained from the polysomnography device, can be used to learn the body position of the patient at the time of apnea.
Determination of Optimal Modulation Amplitude for Electron Spin Resonance (esr) Dating and Dosimetry Studies of Tooth Enamel
(2020) Karataş, Özgül
Fossil remains, which provide important information about past life and ecology, are especially important in natural history and life evolution. Recently, many interdisciplinary dating studies have been conducted and many different techniques have been used to investigate the data obtained in this field. Electron Spin Resonance (ESR) (or alternatively, Electron Paramagnetic Resonance, EPR) is one of the methods used in absolute dating and dosimetry studies. It is based on determination of the radiation-centered radicals obtained from the radiation dose absorbed by irradiated materials. One of the important problems in dosimetry and dating studies performed with ESR method is the dependence of experimental parameters on the accumulated dose. The accumulated dose value is effective in determining the actual result of the dating and dosimetric samples. This value is influenced from the stability of the ESR centers, experimental stages, sample preparation or measurement processes. In this study, how the modulation amplitude parameter affects ESR signal intensity in ESR dating and dosimetry studies of tooth enamel investigated. The selective archaeological animal tooth enamel sample was used from the archaeological site of Köşk Höyük, in Turkey for experimental studies. This sample was prepared with combined processes of mechanical and chemical treatment of tooth in laboratory. Tooth enamel sample was irradiated by 60Co gamma-ray source in dose of 1kGy. After irradiation, ESR spectra were recorded at different modulation amplitude values at room temperature using X-band ESR Spectrometer. According to the results obtained, the most suitable modulation amplitude values for ESR measurements of tooth enamel sample examined in the study.
Dondurulmuş Deniz Ürünlerinde Vibrio Spp.’nin İlmiğe Dayalı İzotermal Amplifikasyon (loop Mediated Isothermal Amplification, Lamp) Yöntemiyle Belirlenmesi
(2022) Telli, Arife Ezgi; Telli, Nihat; Doğruer, Yusuf; Biçer, Yusuf
Araştırmada, deniz ürünlerinde halk sağlığı bakımından yüksek riskli olarak tanımlanan Vibrio parahaemolyticus, V. vulnificus ve V. cholerae’nın varlığının belirlenmesi amaçlandı. Bu amaçla örneklerde etken tespiti için hızlı ve etkin bir yöntem olan İlmiğe Dayalı İzotermal Amplifikasyon (Loop Mediated Isothermal Amplification, LAMP) metodu kullanıldı. Araştırma materyali olarak farklı satış noktalarından temin edilen dondurulmuş deniz ürünleri kullanıldı (n=212). Örneklerde klasik kültür yöntemiyle etken izolasyonu için ISO / TS 21872-1:2007 ve ISO 21872-2:2007 yöntemleri uygulandı. Elde edilen şüpheli izolatlarda gerçekleştirilen DNA ekstraksiyonu sonrasında genus spesifik PCR reaksiyonuyla gyrB1 gen bölgesi hedeflenerek Vibrio spp. varlığı doğrulandı. Pozitif örneklere V. parahaemolyticus, V. vulnificus ve V. cholerae için sırasıyla toxR, vvhA ve ompW hedef gen bölgelerine yönelik LAMP primer setleri kullanılarak turbidite bazlı Real-Time LAMP uygulandı. Araştırma bulguları değerlendirildiğinde, klasik kültürel yöntemle örneklerin %16.98’inde (36/212) Vibrio spp. kontaminasyonu olduğu belirlendi. Bununla birlikte Vibrio spp. pozitif izolatlarda LAMP reaksiyonu bulgularına göre V. cholerae varlığı tespit edilemezken V. parahaemolyticus ve V. vulnificus kontaminasyon düzeyleri ise sırasıyla %36.1 (13/36) ve %5.5 (2/36) olarak saptandı. Bu çalışma, dondurulmuş muhafaza uygulanarak satışa sunulan deniz ürünlerinde V. parahaemolyticus ve V. vulnificus gibi patojenik suşların varlığının tespiti ve bu gıdaların vibriosis bakımından önemini ortaya koymaktadır. Bu bağlamda deniz ürünlerinde dondurulmuş muhafaza öncesi mikrobiyal kalitenin ve muhafaza esnasındaki koşulların ve hijyenik standartların oluşturulmasının önemli olduğu düşünülmektedir.
The Effect of Coating Parameter of Active Layer on Performance of Polymer Solar Cells
(2022) Yenel, Esma
In this study, Glass / ITO / PEDOT / Polymer / Al organic solar cell structures were obtained by using glass/indium doped tin oxide (Glass/ITO) transparent metal oxide substrates, PEDOT:PSS and P3HT:PCBM polymer photoactive layer and their performance depending on spin rate and coating technique were investigated. The polymer layer was coated using the spin coating method. Al metal was coated by physical vapor deposition method. By keeping the concentration of the photoactive layer constant, the effects of different spin coating rates, beside static and dynamic coating technique on the power conversion efficiency of the cells and their stability were compared. Electrical characterization of organic solar cells was performed under a solar simulator in a glove box system. By applying voltage between -0.5 V and +1.5 V, I-V (current-voltage) measurements of the solar cells were taken in the light and dark. The power conversion efficiencies of organic solar cells coated at 800rpm, 1000rpm and 2000rpm spin coating speeds, respectively, were observed to be 2.34%, 2.08% and 1.98%.When the average efficiency values considered, static coating at 800 rpm gives more reproducible results in comparison with the other average efficiency values. The average efficiency values for static coating at 800 rpm is observed to be %2.
The Effect of the Control Light on the Result in the Transformation of Design Studies Into Printed Products
(2022) Kısa, Mustafa
The aim of visual design is to ensure that the product reaches the target audience in a high-quality way and is accepted by the target audience. Quality printed products attract the attention of the target audience and provide an idea about the product. The product printed closest to the original will also create a positive impression and a sense of trust about the brand and business. In addition, a high-quality printed product is an indication of how much the target audience is valued and how much they care. Printed products will create a positive or negative impression to the target audience about the main product it contains. The visual quality of the packaging will also increase the confidence in the product. In the study, the effect of ambient light andcontrol panel light lighting intensities, which are among the factors affecting quality, on the printing result, was examined. The visual designer and the printing operator who performs the printing of the product perform all the stages from the graphic to the end of printing in order to obtain a quality product. Although the lighting intensity of the control table where printing controls are performed has no effect on either the carrier or the structure of the ink, it has been found that it directly affects the print result and quality due to the negative effect it has on the visual perception of the operator. In the study, it was observed that the lighting intensities of the lights used in the workshop environments where printing takes place and the printing control units below the daylight values or do not have close values have negative effects on the print quality.
Examination of Sustainable Land Management at the Urban Scale
(2022) Ertaş, Mehmet; Güler Nazif
The rapid and uncontrolled growth of the world population is a pressure factor on natural resources and lands. This pressure causes the uncontrolled use and consumption of both natural resources and lands. In the last century, cities have been growing both in terms of population and area, and agricultural lands have been transformed into urban areas. This means the shrinkage of agricultural lands and there are worrying consequences for the future of our world. In order for the world to be a more livable place and to meet the needs of future generations, it is inevitable that the sustainability approach should be adopted in every field. Preventing the narrowing of agricultural lands and using urban lands by managing them correctly is related to how correctly the land management is applied. However, when land management is considered together with the basic principle of sustainability, it can contribute to the future of our world and minimize the pressure factors. In this study, by looking at land management with the basic principle of sustainability, examinations were made on the Izmir Tire city sample and sustainable suggestions were made for urban lands through zoning implementations and parcellation plans. As a result, it was emphasized that zoning implementations and land requiring expropriation should be planned from the perspective of sustainable land management and brought to the city.
Fabrication and Electrochemical Properties of Po Lypyrol/Multi-walled Carbon Nanotube Composites for Solar Cell Applications
(2021) Torlak Yasemin; Yenel, Esma; Ak Metin
In this study, polypyrrole and multi-walled carbon nanotube (MWCNT) composite film was produced by electrochemical polymerization of pyrrole with MWCNT on ITO surface. The electrochemical properties of composite containing polypyrrole and MWCNT have been investigated. The electrochemical behavior of this composite obtained depends on the electrostatic interactions of the materials in it with each other.The PPy/MWCNT composites were used as counter electrode in the fabrication of dye sensitized solar cells (DSSCs). The solar cell performance results were evaluated by changing the nanotube concentration in the composite film. This composite can also be useful for producing a family of low-cost and easy to prepare solar cell or sensing or energy storage devices.

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