Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Korkmaz, Şadan(9)
- Pat, Suat(9)
- Özen, Soner(9)
- Şenay, Volkan(9)
- Cuce, Erdem(8)
- Dertli, Enes(8)
- Karaali, Rabi(6)
- Akdemir, A.O.(5)
- Dadasoglu, F.(5)
- Ekinci, A.(5)
- Han, I.(5)
- Karagoz, K.(5)
- Korkmaz, Özge(5)
- Oztekin, A.(5)
- Set, E.(5)
- Cuce, Pinar Mert(4)
- Erdem, O.(4)
- Saricaoglu, Furkan Turker(4)
- Tosun, Figen Çam(4)
- Şahin, Engin(4)
- Aksakal, Vecihi(3)
- Allm, Bünyamin(3)
- Bayram, Bora(3)
- Elcik, Harun(3)
- Erdoğan, Yaşar(3)
- Karcıoğlu, Reşat(3)
- Kurnaz, Ersin(3)
- Liu, Peide(3)
- Sarikaya, İsmail(3)
- Turhan, Sadettin(3)
- Uçurum, Metin(3)
- Yilmaz, Mustafa Tahsin(3)
- Yudar, H. Hakan(3)
- Öztürk, Mesut(3)
- Şahin, Rıdvan(3)
- Abdioglu, M.(2)
- Abuşoǧlu, A.(2)
- Ag, Aliriza(2)
- Agar, Guleray(2)
- Akkuş, Tuba(2)
Yayınlar
- MakaleYalnız künye2017Determinants of Countries’ Logistic Performances
Bozma, Gürkan; Başar, Sibel İsmailçebi
In this paper, we examine macroeconomic and political determinants of Logistic Performance Index (LPI) using Pooled Panel Data Analysis for 71 countries during 2007-2014. GDP, openness and FDI for macroeconomic determinants and Table 3B of the ICRG for political variables were used. As a result of the findings, GDP and trade openness were determined important macroeconomic variables explaining LPI. Besides, democratic accountability and external conflict are effective in determining the logistical performances of countries
AtıfTR Dizin11
İncele - MakaleYalnız künye2017Ulusal kimliğin batı balkanlarda ab üyelik koşullarının geçerliliği üzerindeki etkisi
Bilici, İlhan; Celik, Sinem
Avrupa Birliği (AB) 2004 yılından bu yana Orta ve Doğu Avrupa ülkelerinin büyük çoğunluğunu resmi olarak birliğe kabul etti ve Batı Balkanlarda geriye kalan üye olmayan ülkeler AB'nin yeni hedefi haline geldi. Ancak, Birlik AB politik üyelik koşulları yoluyla kurallarını Orta ve Doğu Avrupa ülkelerine kıyasla Batı Balkanlardaki diğer üye olmayan ülkelere aktarırken birtakım zorluklarla karşılaşmıştır. Burada akla iki soru gelmektedir: Birinci soru, "Hangi şartlar altında bu koşullar etkili olabilir?" iken; ikinci soru, "AB üyelik koşulları neden Batı Balkanlarda bulunan ülkelerin iç politikasında kısmen sınırlı bir rol oynar?" şeklindedir. Bu meseleyi açığa kavuşturmak için Schimmelfennig ve Sedelmeier (2004) tarafından "dış teşvik modeli" benimsenmiştir. Bu çalışma "dış teşvik modelinin" bu soruları tam anlamıyla cevaplandıramadığını ve ulusal kimliğin Batı Balkan devletleri olan Hırvatistan ve Sırbistan'da AB üyelik koşullarının etkililiğini belirleme noktasında önemli bir role sahip olduğunu ileri sürmektedir. Çalışmanın Hırvatistan ve Sırbistan'ı durum çalışmaları olarak ele almasının sebepleri; bu iki ülkenin eski Yugoslav Sosyalist Federal Cumhuriyeti olmaları ve 1990'lı yıllarda ortak bir savaş tarihi paylaşmalarıdır. Belirtilen bu ortak özelliklere rağmen bu iki ülkenin Birliğe olan üyelik sürecine ilişkin tutumlarının birbirinden farklılık arz ettiği dikkat çekmiştir (Massari, 2010). Hırvatistan AB üyeliğini hâlihazırda 2013 yılında elde etmiş olmasına rağmen, Sırbistan'ın bu üyeliği gerçekleştirme noktasında kat etmesi gereken daha çok yol vardır
AtıfTR Dizin1İncele - MakaleYalnız künye2017Örgütsel vatandaşlık davranışları ve karar verme tarzlarının dönüştürücü liderlik davranışları üzerindeki etkisi
Çınar, Ertuğrul; Yilmaz, Fetullah; Durmus, Ibrahim
Örgütsel Vatandaşlık, Karar Verme Tarzları ve Dönüştürücü Liderlik kavramları yönetim biliminde post modern dönemlerden sonra önemi gittikçe artan paradigmalarındandır. Teknolojinin ve Bilgi çağının baş döndürücü bir şekilde ilerlemesi, Şirket ve Kurum yöneticilerinin Hiper-Rekabet ortamında ne tür bir pozisyon belirlemeleri gerektiğini çok önceden planlayıp bu yönde refleks geliştirmelerini zorunlu kılmaktadır. Çalışmamız da; Örgütsel Vatandaşlık kavramını: ’’Diğerkâmlık, (yardımseverlik), Vicdanlılık, Nezaket, Centilmenlik (Sportmenlik) , Sivil Erdem, boyutlarıyla ele alırken, Karar Verme Tarzlarını: Ani (spontane) karar verme, Rasyonel (Akılcı) karar verme, Sezgisel Karar Verme, Bağımlı Karar Verme, Çekingen Karar Verme olarak ele aldık. Son olarak araştırma modelimizde bağımlı değişken olarak incelediğimiz Dönüştürücü liderlik kavramının boyutlarını da: Zihinsel Teşvik, Karizma – Davranışı, Telkin Edici Liderlik, Bireysel Düzeyde İlgi ve Karizma – Atfetme boyutları’’ ile ele almaya çalıştık. Araştırmanın evrenini Gümüşhane ve Bayburt illerinde İktisadi İdari Bilimler Fakültesi ve Gümüşhane Meslek Yüksekokulunda öğrenimine devam eden, geleceğin yönetici adayları olan işletme gündüz öğrencileri teşkil etmektedir. Araştırmaya Gümüşhane Üniversitesinden (110) ve Bayburt Üniversitesinden (111) öğrenci toplam da 221 öğrenci katılmıştır. Araştırmanın örneklemi bu şekilde oluşturulurken Anketlerin devir hızı% 74'tür Daha önceden Örgütsel Vatandaşlık, Karar Verme Tarzları ve Dönüştürücü Liderlik üzerine kavramsal ve latent (boyutsal) olarak birçok çalışma yapılmıştır ancak bu çalışmada Yapısal Eşitlik Modellemesini (YEM ) kullanarak ilk defa Örgütsel Vatandaşlık Davranışları ve Karar Verme Tarzlarının Dönüştürücü Liderlik üzerindeki etkisi incelenmeye çalışılmıştır.
AtıfTR Dizin5İncele - MakaleYalnız künye2017Bayburt logistic village, a study on the logistic village perception of bayburt university students
Battal, Fetullah; Çınar, Ertuğrul; Yıldız, Şaduman; Kılıçaslan, Şenol; Özden, Erdem Alp
In this research, logistic villages, especially the logistic village, where will be established in Bayburt, have investigated in order to understand to the economic contributions to the city, region and country, and the development and potential development which will be achieved afterwards. With the model proposal of Bayburt logistic village, we have tried to give an idea about the structure and function of the logistic village which will be established to the local and national interlocutors It is also aimed that our work will be inspired to mainly future research about logistics and logistic villages and Bayburt logistics village works and directory direction. Our research İs basically work İnto the world logistics, logistic of Turkey, logistic in the region and logistics in the Bayburt.Bayburt has a duality in the Eastern Black Sea region in terms of its geographical location, but hard continental climate is dominant. When we take Bayburt province center, Erzurum in the east, Gümüşhane and Erzincan in the west; In the north, it is observed that Trabzon and Rize are in a very strategic position. Therefore Bayburt is a very important center in terms of logistics with the use of the transportation conditions in these areas and the finishing of the tunnels which are constantly under construction from the great targets of our country in 2023. In Bayburt province, dry food storage areas can be established as Logistics. In contrast to the black sea climate in the vicinity, the nemo ran is low and it can create an efficient and sheltered storage area. It canalso create an incentive for employment in the region.Also in our study Methodology; After the descriptive analysis, theFit index intervals were examined within the scope of factor analysis,ANOVA analysis and Structural equation model. The H1, H2, H3hypotheses investigated in our study were evaluated within this scope.STRUCTURED ABSTRACT1-IntroductionIn consequence of globalization and rapid developments intechnology, companies have to be able to optimize speed, flexibility, costand consumer demands in order to survive in a challenging national andinternational competitive environment. Therefore, it is essential thatcompanies deliver their products and services to target markets muchfaster and at an optimum cost than their competitors. There is no doubtthat this competition of companies is a big deal in logistics activities. Asa matter of fact, logistics activities will result in lower costs, higherquality, increased production and customer satisfaction. At the end of allthis, a significant advantage will be gained nationally and internationally.The desire of companies to appreciate these advantages has led to anincrease in the importance of logistics.2-Conceptual FrameworkLogistics management is the full range of administrative activitiesthat meet the two-way flow of goods or supplies between shipment pointsand delivery points in line with customer needs (Tanyaş, 2005: 6).Logistics management is basically the process of planning the flowof goods and services through the various channels of production to theproducer. It is mainly aimed at solving the problems that may beexperienced in this flow process. The nececities for businesses to have alogistics management lies in the need to achieve the following objectives(Erdal ve Çancı, 2009: 47):• Reducing the cost of goods and services• Creating a competitive advantage• Providing added value to the business• Establishing high quality standards• Harmonizing the business with environmental conditions.Logistics management consists of three basic stages. In the firstphase, there is a physical distribution. The physical distribution phaseessentially begins with the acceptance the order. Following the orderacceptance step, order processing, inventory control, warehouse andstock movements are in the line. The second step in logistics managementis to identify the raw materials and materials that will be needed in themanufacturing process. They are transportation, main productionprogram and support for the distribution of goods within themanufacturing process from one warehouse to another. Providing necessary coordination between manufacturing and physical distributionis one of the main objectives of logistics management. Procurement is theprocess of obtaining raw materials and goods by utilising externalsources. Important elements in the procurement process includedetermining the characteristics and boundaries of supply sources,searching for new sources of supply and establishing continuous andsystematic relationships with existing sources of supply.The development of logistics activities can be taken up to the 19thcentury. The birth of Logistics as an industry and trade area is linked tothe Industrial Revolution and modernism process. In this part of thestudy, the development of logistics activities in our country and abroadwill be examined.The history of the first work in the field of logistics dates back tothe 1850s. The logistics economy was written by Lardner in London.Later, economists such as Taussig, Fetter and Handley worked. Between1956 and 1965, the concept of integrated logistics came to light, andDrucker, one of the well-known names in this field, began to gain clarity(Drucker, 1962: 72).The 1980s are a turning point in terms of the logistics sector. Therewas a rapid development and growth in the process. In the 1980s, thenotion of integrated logistics began to gain importance due to the evergrowingrapid growth in the logistics sector (Bowersox et al., 2002: 328).With the 1990s, organizations began to reduce logistics costs.Combination of logistics services and outsourcing strategies have begunto be preferred (Ross, 1998: 96).The development of the concept of logistics in our country is quitenew. Mainly import and export activities, in general large-sc
AtıfTR Dizin1İncele - MakaleYalnız künye2017İlköğretim Matematik Öğretmeni Adaylarının Örüntüleri Genelleme Süreçleri: Stratejiler ve Gerekçelendirmeler1
Öztürk, Mesut; Akkan, Yaşar; Akkan, Pınar
Bu çalışmanın amacı, ilköğretim matematik öğretmeni adaylarının farklı örüntü problemleri ile ilgili genelleme stratejilerini incelemek, genellemelerinin altında yatan gerekçelendirmeleri keşfetmek ve genelleme ile gerekçelendirmeleri arasındaki ilişkileri belirlemektir. Çalışma nitel araştırma desenlerinden olgubilim modeline göre tasarlanmıştır. Çalışma, Doğu Karadeniz Bölgesindeki bir üniversitenin İlköğretim Matematik Öğretmenliği programında öğrenim gören 4. sınıf öğretmen adayları ile yürütülmüştür. Veri toplama araçları, hem literatür hem de öğretim üyesi desteğiyle hazırlanan ve farklı çözüm stratejilerinin ve gerekçelendirme çeşitlerinin üretilebildiği lineer ve kuadratik örüntü problemleridir. Mülakatlar sonucu toplanan veriler araştırmanın kavramsal çerçevesi dâhilinde betimsel analiz tekniği kullanılarak çözümlenmiştir. Elde edilen sonuçlardan, öğretmen adaylarının en yaygın kullandığı strateji türü fonksiyonel strateji olmakla birlikte, içeriksel, yinelemeli, tahmin-kontrol ve karma stratejileri de kullanmışlardır. Öğretmen adaylarının çoğu gerekçelendirmelerini sayısal kontrol yoluyla doğrulama ile yapmışken, açıklama ve dışsal bilgi kaynağı yoluyla gerekçelendirme yapan öğretmen adayları da tespit edilmiştir
AtıfTR Dizin2İncele - MakaleYalnız künye2017The Level Of Importance Given To Environmental Accounting By Manufacturing Enterprises : A Research In Erzurum, Erzincan, Bayburt Region
Orhan, M. Suphi; Ag, Aliriza
The aim of this study is to determine the level of importance given to environmental accounting within the concept of social responsibility of manufacturing enterprises operating in TRA1 Region (Erzurum, Erzincan, Bayburt). In accordance with this purpose, the production of business operating in the region the level of knowledge on environmental accounting, environmental audits and perspectives for reporting will be revealed. In the study, Croncbach’s Alpha Method and principal component analysis (factor analysis) were used for the detection of internal consistency and construct validity. The level of importance given to environmental accounting were tried to be determined by comparing environmental accounting practices with the characteristics of the business model established under the framework of the research, environmental accounting. It has been identified that a significant relationship in the committed analyses between time activities of enterprises and operating cities with the environmental accounting. On the other hand, it has been found that business enterprises operating between 0-10 years give more importance to environmental accounting.
AtıfTR Dizin2İncele - MakaleYalnız künye2017“Dalyan” kelimesinin kökeni üzerine
Güzel, Ferdi
Türkçede farklı kaynaklardan gelen iki dalyan kelimesi vardır. Bazı kaynaklarda bu sesteĢ kelimelerin aynı kelime olduğu savunulmuĢ, bazı çalıĢmalarda ise bu kelimelerin farklı kaynaklardan geldiği belirtilmiĢtir. Etimolojik çalıĢmalarda genellikle farklı anlamlara sahip olan iki dalyan da yabancı bir kökene bağlanmaktadır. “Uzun boylu” anlamına gelen dalyan kelimesi Türkçedir, bu kelime tay isminden benzerlik ifade eden +lAŋ eki ile türetilmiĢtir. Dalyan kelimesi Orta Türkçe taylaŋ kelimesinden gelmektedir. BaĢlangıçta “tay gibi, taya benzeyen, genç” anlamına gelen taylaŋ kelimesi zaman içinde çeĢitli ses değiĢimleri geçirerek dalyan‟a dönüĢmüĢ, “uzun boylu, boylu boslu” anlamlarını da kazanmıĢtır. ÇağdaĢ lehçelerdeki ve Türkiye Türkçesi ağızlarındaki tay kökünden türemiĢ benzer anlamlı kelimeler bu görüĢü desteklemektedir.
- MakaleYalnız künye2017Some Relations between Kekule Structure and Morgan-Voyce Polynomials
Gültekin, Inci; Sahin, Bunyamin
In this paper, Kekule structures of benzenoid chains are considered. It has been shown that the coefficients of a B-n (x) Morgan Voyce polynomial equal to the number of k-matchings (m(G, k)) of a path graph which has N = 2n + 1 points. Furtermore, two relations are obtained between regularly zig zag non-branched catacondensed benzenoid chains and Morgan Voyce polynomials and between regularly zig zag non branched catacondensed benzenoid chains and their corresponding caterpillar trees. (C) 2017 University of Kashan Press. All rights reserved
AtıfWoS1
İncele - BildiriAçık Erişim2017Learners' views about cloud computing-based group activities
Yildirim, Serkan; Bölen, Mehmet Cem; Yildirim, Gurkan; Masal, E; Onder, I; Besoluk, S; Caliskan, H; Demirhan, E
Thanks to its use independently of time and place during the process of software development and by making it easier to access to information with mobile technologies, cloud based environments attracted the attention of education world and this technology started to be used in various activities. In this study, for programming education, the effects of extracurricular group assignments in cloud based environments on learners were evaluated in terms of group work satisfaction, ease of use and user satisfaction. Within the scope of computer programming education lasting eight weeks, a total of 100 students participated in the study including 34 men and 66 women. Participants were divided into groups of at least three people considering the advantages of cooperative learning in programming education. In this study carried out in both conventional and cloud based environments, between groups factorial design was used as research design. The data collected by questionnaires of opinions of group work were examined with quantitative analysis method. According to the study results extracurricular learning activities as group activity created satisfaction. However, perceptions of easy use of the environment and user satisfaction were partly positive. Despite the similar understandings; male participants were easier to perceive use of cloud computing based environments. Some variables such as class level, satisfaction, computer and internet usage time do not have any effect on satisfaction and perceptions of ease of use. Evening class students stated that they found it easy to use cloud based learning environments and became more satisfied with using these environments besides being happier with group work than daytime students.
AtıfOpenAlex3İncele - BildiriAçık Erişim2017Scopus SJRQ1Antiproliferative and apoptotic properties of vulpinic acid on A549, AGS and HeLa cells
Kizil, Hamit Emre; Agar, Guleray
- MakaleYalnız künye2017Scopus SJRQ3EFFECTS OF AMBIENT CONDITIONS ON PERFORMANCE OF GAS TURBINE COGENERATION CYCLES
Karaali, Rabi; Öztürk, Ilhan Tekin
In this paper, effects of the ambient conditions on performance of cogeneration cycles are analyzed by Using exergy analysis method. These cogeneration cycles are the simple cycle, the air preheating cycle, the air-fuel preheating cycle and the inlet air cooling cycle. Also; these cycles are evaluated thermodynamically for different air and fuel mass ratio and the performance of these cycles are compared. The electrical power generation increases about 10-15 % by decreasing the inlet air temperature of the compressor from 25 degrees C to 0 degrees C. However, the thermal power decreases about 10 % with decreasing inlet air temperature. During the summer, the electric power can be easilyincreased 2-7 % by injecting water into the inlet air of the compressor. The exergetic efficiency of cycles is decreased 11-13 %; by decreasing the compressor inlet air pressure from 101.3 kPa to 70.18 kPa. But this change decreases the electric power generation about 25 %. The highest exergy efficiency is obtained for the air-fuel preheated cycle. The simple cycle is the best among the four cycles to obtain high heat rate and heat exergy. The effects of all ambient conditions on these cycles are considered simultaneously, analyzed and compared With each other in this study.
AtıfWoS3İncele - MakaleYalnız künye2017Mechanical Properties of Conventional Concrete Produced With Different Type of Aggregates in Bayburt Region
Tekin, Ilker; Kotan, Turkay; Yurdakul, Muhammet; Öner, Erdal
In this study, the limestone, natural aggregate, serpentine and Bayburt stone located in the province of Bayburt used as aggregate in conventional concrete production. In the experiments, the cement dosage and workability were kept constant. Slump, Ve-Be, unit weight and the highest temperature values in first 2 hours of the fresh concrete were measured. The concrete samples prepared with Bayburt stone were cured for 90 days and the others were cured for 28 days in lime-saturated water. Strain-stress data and water absorption values were measured on the hardened concretes at 7 and 28th days age through the records of stress and strain data during compressive strength tests. According to results of this study, the compressive strengths of the concrete samples with limestone, natural aggregate and serpentine were on average of 40, 35 and 5 MPa, respectively, on the 28th day. Also, in concrete samples with Bayburt stone, the compressive strengths were reached to 16 MPa for 28 days and to 22 MPa for 90 days.
AtıfWoS4OpenAlex3İncele - MakaleAçık Erişim2017Searching Cursive Handwriting Process as a Part of Skills and Sights: Example of the First Grade Teachers
Sarikaya, Ismail; Yilar, Omer
The aim of this study is to analyze the processes of cursive handwriting of the teachers who perform the cursive handwriting teaching activity and their views about this process by the scope of the special content knowledge. In the study, the method of the case study by the interactive design of the qualitative approach was utilized. The study was conducted with 6 first grade teachers who work in 6 different primary schools in Bayburt City. Two of these schools are located in villages within the city center of Bayburt. The results of the study yield that most of the teachers participated in the study did not like their cursive handwriting and did not essentially follow the rules while writing, changed spectrograms, and did not give the required importance. Moreover, some other findings were obtained that, teachers' writing abilities were insufficient and fast writing negatively affected the handwriting. Teachers notably emphasized that they find cursive handwriting very exhausting and current spectrogram rules were not in line with cursive handwriting.
AtıfOpenAlex4İncele - BildiriYalnız künye2017Harvesting Solar Energy for Limited-Energy Problem in Wireless Sensor Networks
Kosunalp, Selahattin; Cihan, Ahmet
The major problem in wireless sensor networks (WSNs) is the limited-energy source, typically small batteries, employed by sensors. In order to prolong the lifetime of the WSNs, a lot of approaches have taken the limited-energy problem as a primarily design criterion. However, inevitable energy depletion will eventually disturb the operation of the WSNs. Recent studies have shown that renewable energy sources would potentially provide an infinite energy source for powering WSNs. Solar energy is the most effective energy source for WSNs as it has the largest power intensity. Therefore, each sensor which requires a small amount of energy for efficient operation can harvest sufficient energy from solar. In this study, a platform is designed in order to allow sensors to exploit solar energy. The performance of the sensors in terms of the lifetime is practically studied. The results demonstrate that sensors can also survive when there is no energy available through storing energy in a super-capacitor. IRIS nodes are used in experiments as they are very popular in WSNs domain.
- BildiriAçık Erişim2017Scopus SJRQ1Determination of the Antigenotoxic effects of Evernic acid against genotoxic effects of CCL4 on HUVEC lines
Agar, Guleray; Kizil, Hamit Emre; Ceker, Selcuk; Capik, Ozel; Sengul, Bulent
- MakaleYalnız künye2017Scopus SJRQ1Active Earth Thrust Theory for Horizontal Granular Backfill on a Cantilever Wall with a Short Heel
Kamiloglu, Hakan Alper; Sadoglu, Erol
Cantilever retaining walls are earth-retaining structures commonly used in construction. Conventional methods used to determine the active earth thrust acting on a wall often neglect friction between the soil and wall. This study presents an analytical solution for determining the active earth thrusts acting on a cantilever retaining wall with a short heel and a shear key that supports granular backfill. Three different earth thrusts were considered to be acting on three different parts of the rear face of the wall; the thrusts were derived using the limit equilibrium method. The active earth thrust formulas were also simplified in terms of earth thrust coefficients, unit weight, and wall height. An algorithm was developed to obtain earth thrust coefficients depending on various wall dimensions and internal friction angles and to prepare graphs representing earth thrust coefficients and failure surface angles. The effects of wall dimensions and internal friction angles on the earth thrusts and failure surface angles were determined. Finally, the proposed method of determining earth thrust coefficients was compared with other approaches.
AtıfWoS21OpenAlex20İncele - MakaleAçık Erişim2017Scopus SJRQ2Microalgae production and biofuel from microalgae
Elcik, Harun; Çakmakci, Mehmet
Fossil fuel reserves which supplying a major portion of energy needs, are depleting rapidly, and its environmental damages increases day by day. Therefore, like all developed and developing countries, our country have focused on the use of renewable energy sources. Within this scope in the our country, it was aimed gain of renewable energy sources to economy, promotion of sustainable energy production, and protection of environmental. Recently, one of the growing importance of renewable energy sources is the biomass energy. As an biomass energy source, all vegetable and animal organic substances which the main components are comprising carbohydrate compounds can be used. In these energy sources, microalgae seem promising for biofuel production due to their many advantages such as they have high photosynthetic efficiency, high biomass production, and they grow quickly. From microalgae, by using biochemical methods electricity, ethanol, hydrogen, methane and biodiesel and thermochemical methods syngas, biochar, biodiesel and electricity can be produced. In this review article, isolation of microalgae, microalgal biomass production, the methods used to biomass harvesting, and the availability of microalgae as a source of raw materials for renewable biofuels were viewed.
AtıfWoS13OpenAlex11İncele - MakaleYalnız künye2017Optimization of Pectin Extraction from Orange Pulp and Characterization of Compositional and Steady Shear Properties
Yilmaz, Mustafa Tahsin; Muslu, Asli; Karasu, Salih; Bozkurt, Fatih; Dertli, Enes
Pectin, which is one of the most important wastes of fruit juice industry, was extracted from orange pulp at optimum conditions (pH, time and temperature) and modified using pectinase. The effect of modification on the structural properties of pectin was monitored using Fourier transformed infrared spectroscopy (FTIR) and high performance liquid chromatography (HPLC) analyses. The bands at 1600-1800 cm(-1) which indicate the specific region and quality of pectin were detected using FTIR while galacturonic acid content was determined using HPLC. The results showed that the galacturonic acid content of pectin from orange pulp was determined to be 406.44 mg/g powder pectin while that of the modified pectin from the orange pulp was determined to be 465,34 mg/g powder pectin. In addition, flow properties of the pectin samples were determined using rheological analysis. The viscosity and viscoelastic properties of the modified pectin samples were revealed to be different from those of non-modified pectin samples. The consistency index values of unmodified and modified pectin samples were determined to be 0.0559 Pa.s(n) and 0.0046 Pa.s(n), respectively.
AtıfWoS3İncele - MakaleAçık Erişim2017The Possibilities of Using Some Spice Essential Oils in Ice Cream Production
Macit, Emine; Çaglar, Abdullah; Bakirci, Ihsan
In present study, some physical, chemical, sensory and microbiological characteristics of ice cream samples produced by using 4 different essential oils (Coconut, lemon bark, clove and cinnamon) in 2 different levels (0.2% and 0.4%) were investigated. The findings indicated that although the addition of essential oil was not significantly effective on the physical and chemical properties of ice cream samples (P>0.05), the melting rates increased during storage. The sample with 0.2% coconut essential oil was the most favorite sample in sensory evaluations, while the sample with 0.4% clove essential oil was the least favorite sample. In general, samples with 0.2% essential oil were more appreciated than samples with 0.4%. It has been determined that ice cream samples conformed to TS 4265 Ice Cream Standard (Turkish Standard) in terms of microbiological properties. With this study, it was determined that some essential oils can be used as a natural aroma substance in the production of ice cream.
AtıfWoS6OpenAlex5TR Dizin3İncele - MakaleYalnız künye2017The effect of extreme sports on oxidative stress
Aggon, Eser; Agirbas, Ozturk; Ucan, Izzet; Hackney, Anthony C.
Background & Study Aim: Despite the high risk of extreme sports, participation rates have increased in the last years. Rafting and paragliding are two of the most popular extreme sports. The aim of this study was the effect of rafting and paragliding exercises in males on oxidative stress situation and antioxidant status. Material & Methods: Seventeen male rafters and ten male paragliders voluntarily participated in the study. The inclusion criteria were: non-smoker, no known history of cardiovascular disease, body mass index (BMI) < 30 kg/m2, and no intake of medications or antioxidant supplements. Blood samples were taken at rafting and paragliding practices' a day before and after the sporting activities. The data were statistically analysed with Wilcoxon and Mann-Whitney U tests. Results: Rafting activity increased the values of the total antioxidant situation (TAS), paragliding exercises decreased the level of TAS while paragliding increased the level of total oxidative stress (TOS). Differences existed between the group only before activities in TAS values. Conclusions: The specific property of the rafting workout is to stimulate of participants to cope with oxidative stress by activating the antioxidant status. In turn paragliding exercises increase oxidative stress due to the danger element in the sport and perhaps requiring the participants stay at a high altitude, in some situations, during its practice.
AtıfWoS1İncele