Browsing by Author "Polat E."

Now showing 1 - 7 of 7
  • No Thumbnail Available
    Item
    The distribution and habitat of calomera littoralis mandli (mandl, 1967) (coleoptera: Cicindelidae) on the coastal margin of lake van in turkey
    (2006) Özgökçe M.S.; Atlihan R.; Kasap İ.; Özgökçe F.; Yıldız Ş.; Demir M.; Polat E.
    The tiger beetle Calomera littoralis mandli was found at Lake Van in eastern Anatolia at 20 out of 47 localities surveyed during 2004–2005. It occurs in open habitats with fine sand mixed with clay or in salt-marshes and with little plant cover. Three groups of larval burrows were determined, with average openings of 1.54 mm, 2.46 mm and 3.80 mm. These correspond to the 1st, 2nd and 3rd larval instars. © 2006 Taylor & Francis Group, LLC.
  • No Thumbnail Available
    Item
    Zooplankton composition of Van Lake Coastline in Turkey
    (Academic Journals, 2010) Yildiz S.; Özgökçe M.S.; Özgökçe F.; Karaca I.; Polat E.
    This study was completed with periodical surveys in coastal band of Van Lake between May and September in 2005 to 2006 period. It was carried out on a total of 20 sites selected as sampling points and having three distinct characteristics. During the study, a total of 20 species (14 belonged to genus of Rotifera, 4 to Copepoda and 2 Branchiopoda) were found at the Van Lake coastal zone. Genera Notholca squamula, Keratella quadrata, Colurella colurus, Lecane ohiensis, Lecane grandis and Lecane lamellata have been detected for the first time at the Van Lake coastal zone. © 2010 Academic Journals.
  • No Thumbnail Available
    Item
    Detection of anti-leishmanial effect of the Lucilia sericata larval secretions in vitro and in vivo on Leishmania tropica: First work
    (2012) Polat E.; Cakan H.; Aslan M.; Sirekbasan S.; Kutlubay Z.; Ipek T.; Ozbilgin A.
    It is known that some of the enzymes and substances secreted by 2nd and 3rd stages of the Lucilia sericata larvae to have bacteriostatic and bactericidal effects. From this point of view, we investigated the anti-leishmanial effect of larval secretions of the L. sericata on the Leishmania tropica both in vitro and in vivo conditions.In vitro: It was observed that promastigotes of L. tropica had undergone lyzis within 1. min in the larval secretions of L. sericata. However, larval secretion was ineffective on the promastigotes within Novy-MacNeal-Nicolle (NNN) cultures and RPMI 1640 medium.In vivo: Seven groups of male Balb/C mice (6 study groups and 1 control group), each composed of eight weeks old 10 mice were formed. L. tropica promastigotes were injected subcutaneosly to the soles of the SG mice' feet. In study groups, cutaneous lesions were developed Limoncu et al., 1997 in 2 (20%) and 1 (10%) of the SG-1 and SG-2, respectively after 15. days. There were L. tropica in the smears prepared from the lesions and L. tropica was observed in the cultures. Cutaneous lesions were not developed in 8 (80%), 9 (90%) and 10 (100%) of the SG-I, SG-II and SG-III, respectively. There were no cutaneous lesions developed in the soles of the feet. There were no L. tropica in the smears prepared from the infected soles of the feet neither L. tropica was observed in the cultures.Larval secretions were given into the cutaneous lesions to the feet soles of the SG-IV, V and VI mice after 6. months. No healing was observed in the cutaneos lesions of 4 (40%), 5 (50%) and 1 (10%) of SG-IV, SG-V and SG-VI, after 6. months, respectively. There were L. tropica in the smears prepared from the lesions and L. tropica was observed in the cultures. On the other hand, the lesions of 6 (60%), 5 (50%) and 9 (90%) of SG-IV, SG-V and SG-VI were diminished in size and disappeared completely after 6. months. There were L. tropica observed in the smears prepared from the infected soles of the feet and no growth was observed in the cultures. In the smears prepared from the cutaneous lesions developed in the soles of the feet of the control group mice, L. tropica was visualized and observed in the cultures.A statistical significant difference was observed between study groups and control group (p<0.001).In our study we demonstrated for the first time that the secretions of the 2nd and 3rd stages sterile and pure larvae of L. sericata had effects on promastigotes of L. tropica in in vitro and very effective on amastigote forms in in vivo conditions. © 2012 Elsevier Inc.
  • No Thumbnail Available
    Item
    Leishmaniasis in Turkey: Visceral and cutaneous leishmaniasis caused by Leishmania donovani in Turkey
    (Elsevier B.V., 2017) Özbilgin A.; Harman M.; Karakuş M.; Bart A.; Töz S.; Kurt Ö.; Çavuş İ.; Polat E.; Gündüz C.; Van Gool T.; Özbel Y.
    In Turkey, the main causative agents are Leishmania tropica (L. tropica) and Leishmania infantum (L. infantum) for cutaneous leishmaniasis (CL) and L. infantum for visceral leishmaniasis (VL). In this study, we investigated leishmaniasis cases caused by L. donovani and established animal models for understanding its tropism in in vivo conditions. Clinical samples (lesion aspirations and bone marrow) obtained from CL/VL patients were investigated using parasitological (smear/NNN) and DNA-based techniques. For species identification, a real time ITS1-PCR was performed using isolates and results were confirmed by hsp70 PCR-N/sequencing and cpb gene PCR/sequencing in order to reveal Leishmania donovani and Leishmania infantum discrimination. Clinical materials from CL and VL patients were also inoculated into two experimental groups (Group CL and Group VL) of Balb/C mice intraperitoneally for creating clinical picture of Turkish L. donovani strains. After 45 days, the samples from visible sores of the skin were taken, and spleens and livers were removed. Measurements of the internal organs were done and touch preparations were prepared for checking the presence of amastigotes. The strains were isolated from all patients and amastigotes were seen in all smears of the patients, and then isolates were immediately stored in liquid nitrogen. In real time ITS1-PCR, the melting temperatures of all samples were out of range of L. infantum, L. tropica and L. major. Sequencing of hsp70 PCR-N showed that all isolates highly identical to previously submitted L. donovani sequences in GenBank, and cpb gene sequencing showed five isolates had longer cpbF allele, whereas one isolate contained a mixed sequence of both cpbF and cpbE. All mice in both experimental groups became infected. Compared to controls, the length and width of both liver and spleen were significantly elevated (p < 0.001) in both groups of mice. However, the weight of the liver increased significantly in all mice whereas the weight of spleen increased only in VL group. Amastigotes were also seen in all touch preparations prepared from skin sores, spleen and liver. L. donovani strain was isolated from autocutaneous a VL patient first time in Turkey. Animal models using clinical samples were successfully established and important clinical differences of the isolated strains were observed. © 2017 Elsevier B.V.
  • No Thumbnail Available
    Item
    The Effect of Gambling Motivation of Sport Spectators on Propensity for Violence in Sport
    (Springer, 2021) Polat E.; Yıldız K.
    The study aims to analyse the relationships between sport spectators’ gambling motivation and propensity for violence. Descriptive and relational screening model were used in this study. Study group is composed of 539 volunteers determined via purposeful and convenient sampling. Personal Information Form was prepared by the researchers of the study; and Gambling Motivations Scale and Sport Spectators Aggression and Violence Scale were used to gather the data. For inferential statistics, Pearson Correlation Analysis was conducted to reveal the relationships between some variables and sub-scales of measurement tools. Furthermore, multi variable relations between sub-scales of Gambling Motivation Scale and sub-scales of The Sport Spectator Aggression and Violence Scale were analysed through Canonical Correlation Analysis. The results of correlation analysis show that there is a weak significant positive correlation between both the frequency of sport gambling and gambling motivation, and between the frequency of sport gambling and sport spectators’ aggression in all sub scales. In addition, weak significant and positive correlation between both the level of fandom and gambling motivation, and the level of fandom and aggression of spectators was found in all sub-scales. As for the correlation between consuming alcohol before matches and gambling motivation and sport spectators aggression, not consuming alcohol before matches was found significantly high correlated compared to consuming alcohol before matches. In conclusion, it can be said there is a relation between gambling motivation and aggression and propensity for violence. Moreover, it can be thought the fact that the perceived fandom level of gambler sport spectators is high causes the increase in aggression and propensity for violence. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.
  • No Thumbnail Available
    Item
    The Fitness Industry in Turkey
    (Emerald Group Publishing Ltd., 2021) Yildiz K.; Polat E.; Yildiz S.M.
    [No abstract available]
  • No Thumbnail Available
    Item
    Exploring the artificial intelligence anxiety and machine learning attitudes of teacher candidates
    (Springer, 2024) Hopcan S.; Türkmen G.; Polat E.
    With the advancement of artificial intelligence (AI) and machine learning (ML) techniques, attitudes towards these two fields have begun to gain importance in different professions. One of the affected professions is undoubtedly the teaching profession. Increasing the levels of concern for artificial intelligence and attitudes towards machine learning has become important in order to adapt to potential technologies that will be used. The purpose of this study is to examine the anxiety related to AI and the attitudes towards ML among teacher candidates of different ages, genders, and fields. This study investigates the relationships between sub-dimensions of anxiety towards artificial intelligence and attitudes towards machine learning, as well as to identify differences in these sub-dimensions among gender, age, and department. The findings suggest that although teacher candidates from different disciplines, ages, and genders do not have any concerns regarding learning about artificial intelligence, they do express anxiety about the impact of artificial intelligence on employment rates and social life. The results of this study can be beneficial for developing instructional programs that focus on AI in the long run, considering factors such as age, personal experience, gender, and field-specific elements. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2023. corrected publication 2023.