Sürdürülebilir Kalkınma Amaçları
Yazarlar
- Özbek, Mehmet Ferhat(2)
- Akpinar, Ibrahim(1)
- Akpınar, Özlem(1)
- Baltaci, Cemalettin(1)
- Banai, Moshe(1)
- Celik, Necati(1)
- Demir, Sertaç Timur(1)
- Dursun, Emrehan(1)
- Gundogdu, Ali(1)
- Güzel, Melih(1)
- Kaya, Yusuf(1)
- Polat, Alper(1)
- Shetach, Ana(1)
- Stefanidis, Abraham(1)
- Tang, Thomas Li-Ping(1)
- Taskın, Halim(1)
- Vural, Alaaddin(1)
- Yoldash, Mohammad Asif(1)
- Özen, Songül Akbulut(1)
- Özşahin, Talat Şükrü(1)
Yayınlar
- MakaleYalnız künye2019Production and Characterization of Bacterial Cellulose from Citrus Peels
Güzel, Melih; Akpınar, Özlem
Cellulose is the most common polymer in the world, formed by β-1,4 linked glucopyranose units. In this study, citrus peels (lemon, mandarin, orange and grapefruit) were used for the production of bacterial cellulose (BC). The peels were hydrolyzed with dilute acid and hydrolysates were used for BC production. The production of BC was carried out at 28–32 °C for 21 days under static conditions with Komagataeibacter hansenii GA2016. BC yields were found to be between 2.06 and 3.92%. It was found that the FTIR spectra of the BCs produced in citrus peel hydrolysates were similar to BC produced in the commercially available nutrients. The result of this study showed that all the BCs produced from citrus peels were characterized to have high water holding capacity, thin fiber diameter, high the thermal stability and high crystallinity.
- MakaleAçık Erişim2018Indoor and outdoor radon measurements at lung cancer patients’ homes in the dwellings of Rize Province in Turkey
Özen, Songül Akbulut; Celik, Necati; Dursun, Emrehan; Taskın, Halim
In this study, indoor and outdoor radon (222Rn) surveys were carried out in the summer and winter seasons in homes of one hundred lung cancer patients in the year 2013–2014. The aim was to investigate the relationship between radon and cancer patients. Lung cancer patients completed a questionnaire concerning their living environment, various physical parameters and living habits. Pearson correlation and t tests revealed no meaningful results between radon concentrations, on one hand, and environmental and personal living habits, on the other hand. Consequently, the BEIR VI model was adapted and 222Rn exposure was estimated to be responsible for about 12% of the lung cancer incidences in the winter season and around 5% in the summer season in the Rize Province. However, due to the limited number of data and numerous parameters that could lead to lung cancer, the estimations done with the model should be taken very lightly. The annual effective doses due to inhalation of indoor and outdoor 222Rn were estimated to be, respectively, 1.43 and 0.94 mSv y−1. The indoor and outdoor annual effective doses were, respectively, close and below the world annual effective dose (1.3 mSv y−1). At the district level, the indoor annual effective dose equivalent in the İyidere district was 4.52 mSv y−1, which was 3.5 times greater than the world average. The number of patients in the majority of the houses in this district was more than one.
- MakaleYalnız künye2018Analytical solution to continuous contact problem for a functionally graded layer loaded through two dissimilar rigid punches
Polat, Alper; Kaya, Yusuf; Özşahin, Talat Şükrü
A continuous contact problem of functionally graded layer resting on an elastic semi-infinite plane, which is loaded with through two different blocks is addressed in this study. The elasticity theory and integral transformation techniques are used in solution of the problem. The problem is reduced to a system of singular integral equations, and solved numerically by the aid of appropriate Gauss–Chebyshev integration formula. It is assumed that the elastic semi-infinite homogeneous plane is isotropic and all surfaces are frictionless and continuous. The shear modulus and the mass density of the FG layer vary exponentially along the thickness direction.
- MakaleYalnız künye2017The Stranger to Time: What a Collector Stands for in a Hurried Society
Demir, Sertaç Timur
City-dwellers who are threatened by the risk of natural or social disasters are in search of safer houses. Each attempt to satisfy their need for safety, however, turns into another version of the security problem; so much so that, escaping from risk itself turns into different (yet nevertheless more powerful) risks. The film 10 to 11 (2009) focuses on the socio-spatial conflict between a stranger and his neighbours who are anxious about a possible earthquake risk in Istanbul. Mithat, the protagonist of the film, is a stranger not only to place but essentially to time. He lives within time and understands place as an essential means loaded by temporal experiences and memories. This paper deals with the multiple dichotomies between time and memory, between risk and fear, between aesthetics and security, and between attachment and profit in the context of urban transformation. The stranger, who is analysed for the first time as a temporal being in this paper, is discussed using Zygmunt Bauman’s concepts of uncertainty and liquid modernity, Richard Sennett’s capitalism, Ulrich Beck’s risk society, Frank Furedi’s culture of fear, Stephen Bertman’s hurried culture, Elias Canetti’s death, Giorgio Agamben’s forgotten and gone, Svetlana Boym’s nostalgia, and Halbwachs, Assmann, Connerton, and Arendt’s memory, as well as around the temporal spaces of museums, bibliopoles, antique shops, and cemeteries.
- MakaleYalnız künye2017Environmental impact of Gümüşhane City, Turkey, waste area in terms of heavy metal pollution
Vural, Alaaddin; Gundogdu, Ali; Akpinar, Ibrahim; Baltaci, Cemalettin
The aim of this study is to investigate the occurrence of a heavy metal contamination in a solid waste site of Gümüşhane City, Turkey, to examine the dimensions of the risk of contamination, and to present suggestions for possible solutions. For this purpose, heavy metal contents of soil and leachate samples taken from a Gümüşhane waste site were determined by a new method, microwave plasma-atomic emission spectrometry (MP-AES). When the obtained results are compared with background and control values, it can be seen that the region carries contamination risks, especially in terms of heavy metals such as Zn, Cd, Pb, Cu, Ni, and Co. To examine the environmental effects of the landfill area in more detail, geodeposition index (Igeo), enrichment factor (EF), contamination index (PI), and combined contamination index (IPI) parameters are used. In addition, the samples taken from an area supposed to be free of pollution risk were also analyzed as control samples, and the obtained data were statistically compared with the results of the waste area. It is determined that the results of landfill waste site are dissimilar to those of comparison samples in terms of investigated metals, and that they contained higher values in general.
- MakaleYalnız künye2016Theory of Justice, OCB, and Individualism: Kyrgyz Citizens
Özbek, Mehmet Ferhat; Yoldash, Mohammad Asif; Tang, Thomas Li-Ping
Research suggests that organizational justice (procedural, distributive, and interactional justice) has important impacts on work-related attitudes and behaviors, such as organizational citizenship behavior (OCB). In this article, we explore the extent to which individualism moderates the relationship between organizational justice and OCB (organizational obedience, participation, and loyalty) among citizens in Kyrgyzstan. We make additional contributions to the literature because we know very little about these constructs in this former Soviet Union country, Kyrgyzstan, an under-researched and under-represented region of the world. Results of our data collected from 402 managers and employees in Kyrgyzstan offer the following new discoveries. All three justice constructs are related to OCB. Individualism moderates only the distributive and interactive justice to OCB relationships. We develop an intricate theory with provocative implications: Procedural justice produces obedience. For “individualists,” interactional justice inspires loyalty and, interestingly, distributive justice “can only buy” participation, but “can’t buy” loyalty. Therefore, for individualists, interactional justice outweighs distributive justice for organizational loyalty. Based on Kyrgyz citizens’ justice, OCB, and individualism, our theory reveals novel insights regarding culture, money attitude, and intrinsic motivation and provides critical and practical implications to the field of business ethics.
- MakaleYalnız künye2014Attitudes Toward Ethically Questionable Negotiation Tactics: A Two-Country Study
Banai, Moshe; Stefanidis, Abraham; Shetach, Ana; Özbek, Mehmet Ferhat
Current research has identified five discrete US negotiation tactics, a traditional one considered to be ethical, and four considered to be ethically questionable. Scholars have independently used culture to explain how the endorsement of these five negotiation tactics varies across nations. They have also independently used interpersonal trust and ethics propensity to explain antecedents of the endorsement of those five negotiation tactics. This research combines all those variables into one model that investigates the influence of horizontal and vertical individualism–collectivism, ethical idealism, and trust propensity on employees’ attitudes toward ethically questionable negotiation tactics in Israel and Kyrgyzstan. A survey questionnaire was translated from English to Hebrew and Kyrgyz, and 615 responses were collected from employees in various industries in the two countries. We empirically confirmed three types of questionable negotiation tactics discovered in previous one-nation studies, namely, pretending, deceiving, and lying. Vertical individualism was found to be positively, and horizontal collectivism was found to be negatively, related to pretending, deceiving, and lying. Ethical idealism was found to be negatively related to the endorsement of the lying tactics, while trust propensity was negatively related to the pretending tactics. Compared with Israel, employees’ endorsement of ethically questionable negotiation tactics was significantly higher in Kyrgyzstan. Contribution to theory and practice is discussed.
- DergiHuman Studies
- DergiEnvironmental Geochemistry and Health
- DergiMeccanica