15 research outputs found
Science and non-science teachers’ interpretation of physics diagrammes
No full textThis paper discusses teachers’ interpretations of physics diagrammes. The study based on 55 science and non-science teachers, where a qualitative approach was adopted. First, 12 fundamental physics diagrammes were revealed to the teachers, who were asked to think aloud about them. Science teachers and non-science teachers gave similar answers. It has been observed that only the science teacher cohort extended their explanations. When interpreting the diagrammes, the participants in both groups did not notice certain elements that it was expected they would see. The result of this study can inform how teachers interpret physics diagrammes. This paper contributes to the growing interest in international literature as well as national literature regarding the use of diagrammes for teacher training, because interpreting diagrammes is a comprehensive process, which contains certain elements, such as lines, arrows, curves, colour, and objects with boundaries.Keywords: diagrammes; physics learning; physics teaching; science educatio
Analysis of Turkish Science Education Curricula's Learning Outcomes According to Science Process Skills
No full textThis study aims at analyzing the learning outcomes of the 2018 science education curricula in Turkey according to science process skills. Learning outcomes are statements that describe what a learner will know, understand, and/or be able to do after completing a learning process. Learning outcomes were evaluated using document analysis which is a qualitative research method. There were 269 learning outcomes analyzed from the curricula . The science learning outcomes in the curricula which are prepared by the Turkey Ministry of National Education, were examined, starting from fourth-grade to eighth-grade levels. The results show that the least common science process skills are “measuring” and “hypothesizing” dimensions, while the most common are “data interpreting” and “inferring” dimensions. The highest science learning outcomes are at the seventh-grade level, and the least science learning outcomes are at the fifth-grade level. As the grade level increases, it is seen that more learning outcomes represent higher-level skills. The number of basic science process skills of the fourth-grade level learning outcomes is higher than the number of integrated science process skills, and the number of integrated science process skills is high in learning outcomes at all other grade levels
Students%252339%253B Views on the Ethnobotany-Based Nature Education Program and Their Attitudes towards the Plant
No full textThe aim of this research is to determine Students%252339%253B Views on the ethnobotany-Based Nature Education Program and the impact this program makes on their attitudes towards the plant. The research was conducted on 7th-grade students in a state school in İstanbul. 15 ethnobotany based activities were performed throughout Nature Education. The data collection tools were%253A an activity evaluation form composed of open-ended questions and conducted at the end of each activity, a Plant Attitude Questionnaire conducted both before and after the implementation and semi-structured student interviews (n%253D5) performed at the end of the implementation. The answers students gave on the evaluation form and in interviews were analyzed qualitatively in order to determine their views on the activities. The themes formed as a result of data analysis were demonstrated within the tables. The data collected through the Plant Attitude Questionnaire were analyzed quantitatively. At the end of the research, it was found out that most of the students have positive views on ethnobotanic based activities. Moreover, it was revealed that students scores of the attitudes towards the plant demonstrated a meaningful change throughout the study. The data collected with the help of the research were discussed and some suggestions were presented
Examining Students’ Opinions about STEAM Activities
No full textThe purpose of this study is to determine the opinions of students about STEAM activities. This qualitative study was conducted on the with 7th grade students (n=37) who are studying at a public school in Istanbul. A purposeful sampling was used in this study. Nine STEAM activities were used while teaching Force and Energy unit. An evaluation form which is composed of open-ended questions was used as a data collection instrument at the end of the teaching process. The responses provided by students for the evaluation form were analysed qualitatively to determine the opinions of students about the activities. The study was structured as qualitative research and content analysis technique was used to evaluate the obtained data. The findings revealed that a relatively positive attitude about STEAM activities and the contribution that the approach had on students. It was therefore concluded that students have few negative opinions about STEAM activities
Abundances and modes of occurrence of trace elements in the Çan coals (Miocene), Çanakkale-Turkey
No full textThis study presents the concentrations and modes of occurrence of trace elements in 81 coal samples from the can basin of northwestern Turkey. The concentration of trace elements in coal were determined by inductively coupled plasma-mass spectrometry and inductively coupled plasma-atomic emission spectrometry. Additionally, traditional coal parameters were studied by proximate, ultimate. X-ray diffraction, and petrographic analyses. Twenty trace elements, including As, B, Ba, Be, Cd, Cu, Co, F, Hg, Mo, Ni, Pb, Sb, Se Sn,Th, Tl, U, V. and Zn, receive much attention due to their related environmental and human health concerns. The can coals investigated in this study are lignite to sub-bituminous coal, with a broad range of ash yields and sulphur contents. The trace element concentrations show variety within the coal seams in the basin, and the affinities vary among locations. The concentrations of B. Ba, Be, Cd, Cu, Co, F, Hg, Mo, Ni, Pb, Sb, Se, Sn, TI, and Zn in Can coals are within the Swaine's worldwide concentration range, with the exception of As, Th, U. and V. On the other hand, compared with world coals, the Can basin coals have higher contents of As, B, Cu, Co, Mo, Pb, Th, U, V. and Zn. Based on statistical analyses, most of the trace elements, except for U, show an affinity to ash yield. Elements including As, Cd, Hg, Se, Cu, Mo. Ni, and Zn, show a possible association with pyrite; however, the elements Se, B, and Mo can be have both organic and inorganic associations. (C) 2011 Elsevier B.V. All rights reserved.Scientific and Technological Research Council of Turkey (TUBITAK) [105Y114, 106Y041]This study was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) Projects (nos. 105Y114 and 106Y041). The author is grateful to anonymous reviewers and coeditor Dr. Shifeng Dai for their constructive editing which greatly improved the manuscript. I would also like to thank Catherine yigit and Dr. Oguz Hakan Gogus for editing
Vanishing bile duct syndrome in a patient with Hodgkin's lymphoma and asymptomatic hepatitis B virus infection
No full text[Abstract Not Available
Tyrosine kinase-2 gene polymorphisms are associated with ulcerative colitis and Crohn's disease in Turkish Population
No full textBackground and objective: Inflammatory bowel disease is a group of chronic inflammatory conditions affecting gastrointestinal tract. Lots of genes have been identified resulting in susceptibility to inflammatory bowel disease. Any polymorphism leading to functional modifications in tyrosine kinase-2 may precipitate excessive immune response in the intestinal mucosa. The aim of our study is to investigate the involvement of tyrosine kinase-2 polymorphisms in the patients with inflammatory bowel disease in Turkish population. Methods: Four single nucleotide polymorphisms in tyrosine kinase-2 (rs280523, rs2304256, rs280519 and rs280496) were genotyped in 60 Crohn's disease, 151 ulcerative colitis patients and 89 unrelated healthy controls. These polymorphisms were detected by real-time polymerase chain reaction. Results: The presence of genotype (CC) in rs2304256 and (AA) in rs280519 were found to increase the susceptibility to ulcerative colitis (P = 0.024, 0.025, respectively). rs2304256 (CA) and rs280519 (AG) have provided protection against ulcerative colitis (P = 0.021, 0.012, respectively). rs280519 (AG) was protective against Crohn's disease (P = 0.045). rs2304256 (CC) increased the susceptibility to inflammatory Crohn's disease (P = 0.014). The presence of rs2304256 (A) increased the susceptibility to perianal Crohn's disease (P = 0.03). Both rs280519 and rs2304256 polymorphisms were associated with the requirement of corticosteroid and immunosuppressive therapy in ulcerative colitis. Conclusion: This study is the first demonstration of the single marker association of tyrosine kinase-2 polymorphisms with ulcerative colitis and Crohn's disease in Turkish population. They may be effective in the etiology of inflammatory bowel disease in our population. Disparity between our study and others may be related to ethnic differences. (C) 2015 Elsevier Masson SAS. All rights reserved.Scientific Investigation Support Committee of Trakya University (TUBAP), Edirne, Turkey [TUBAP-2013/18]the project was financially supported by fund from the Scientific Investigation Support Committee of Trakya University (TUBAP), Edirne, Turkey (TUBAP-2013/18)
The Role of Serum Cytokines in the Pathogenesis of Hepatic Osteodystrophy in Male Cirrhotic Patients
No full textObjective. In this study, we aimed to investigate the possible role of serum cytokines in the development of hepatic osteodystrophy. Matherial and Methods. 44 consecutive male cirrhotic patients (17 alcoholic, 20 hepatitis B, 7 hepatitis C), 15 age- and sex-matched chronic alcoholics without liver disease, and 17 age- and sex-matched healthy controls were included in the study during one year period. Bone mineral density was measured by dual X-ray absorptiometry in the lumbar vertebrate and femoral neck. Serum interleukin levels were measured by ELISA method. Results. Although osteopenia frequency between our cirrhotic patients was 20%, there was no difference in T-scores among the controls and other groups. Serum interleukin-1, interleukin-8, and tumor necrosis factor-alpha levels were not different between all groups. Serum interleukin-2 and interleukin-6 levels were higher in the cirrhotics than controls (P < 0.001). However, there were no significant difference between osteopenic and nonosteopenic cirrhotics. Conclusion. According to the results of the study in this small population of 44 male cirrhotic patients, frequency of hepatic osteopenia is small and serum interleukins 1, 2, 6, 8, and tumor necrosis factor-alpha may not play a role in the pathogenesis of hepatic osteodystrophy. Further studies in which large number of patients involved are necessary in this field
The Relationship Between Virulence Factors of Helicobacter pylori and Severity of Gastritis in Infected Patients
No full textThe outcome of Helicobacter pylori infection has been related to specific virulence-associated bacterial genotypes. The best known genotypic virulence factors of H. pylori are cytotoxin-associated gene A (cagA) and vacuolating cytotoxin gene A (vacA). The objective of this study was to assess the relationship between H. pylori cagA and vacA status and histopathological findings. Esophagogastrodoedonoscopy was performed in 80 dyspeptic patients. Antrum and corpus biopsies were obtained for isolation of H. pylori and for histopathological assessment. The polymerase chain reaction was used to detect cagA and vacA genes of H. pylori using specific primers. Biopsy samples were stained with hematoxylin and eosin, and histopathological findings were graded using the updated Sydney system. H. pylori from 57 of the 80 patients was incubated. Of the 57 patients, 44 were cagA positive. In the corpus biopsy specimens there was a significant relationship between the density of H. pylori colonization (P = 0.02) and chronic inflammation (P = 0.02) and cagA-positive genotypes. In the antrum specimens there was a significant relationship between cagA positivity and neutrophil activity (P = 0.003) and glandular atrophy (P = 0.002), but not with H. pylori density, chronic inflammation, and intestinal metaplasia. The odds ratio of cagA-positive vs. cagA-negative strains for the presence of glandular atrophy, irrespective of grading and of gastric localization, was 4.62 (95% CI, 1.18-18.08, P = 0.041). No significant relationships were observed between vacA s1 and s2 genotypes and histopathological parameters. Corpus neutrophil infiltration was found to be more severe in the m1 group than in the m2 group (P = 0.004). Other histopathological features showed no difference between m1 and m2 genotypes. In conclusion H. pylori strains showing cagA positivity are associated with more severe gastritis in some histological features but virulence factors of H. pylori do not appear to determine the overall pattern of gastritis.Trakya University Scientific Research Fund [TUBAP-594]; United European Gastroenterology Federation in the 13th UEGW, Copenhagen, DenmarkThis study was supported financially by the Trakya University Scientific Research Fund (TUBAP-594) and has received a grant from the United European Gastroenterology Federation in the 13th UEGW, Copenhagen, Denmark, 2005
Investigation of IL23R, JAK2, and STAT3 gene polymorphisms and gene–gene interactions in Crohn’s disease and ulcerative colitis in a Turkish population
No full textBackground/Aims: Inflammatory bowel diseases are chronic, relapsing, inflammatory conditions. They have a genetic backround resulting in patient susceptibility. The aim of our study is to investigate the involvement of IL23R, JAK2, and STAT3 polymorphisms in inflammatory bowel diseases in a Turkish population. Materials and Methods: Polymorphisms in IL23R (rs11209026), JAK2 (rs10758669), and STAT3 (rs3816769, rs2293152, rs744166, rs957970, rs8074524) were genotyped in 69 Crohn's disease patients, 157 ulcerative colitis patients, and 89 healthy controls. Results: The presence of (C) in rs10758669, (T) and (TT) in rs957970, and (TT) in rs744166 were found to increase the susceptibility to Crohn's disease (p=0.049, p=0.016, p=0.010, p=0.035, respectively), while rs2293152 (GC), rs744166 (CT), and rs957970 (CT) provide protection against Crohn's disease (p=0.007, p=0.043, p=0.043, respectively). While rs2293152 (GC) was protective, rs2293152 (CC) increased the susceptibility to ulcerative colitis (p=0.009, p=0.001). All the polymorphisms were associated with age-at-diagnosis, except rs11209026. Furthermore, rs2293152 was associated with an extension in ulcerative colitis, while rs10758669, rs3816769, rs744166, rs2293152, and rs957970 were associated with the subphenotype in Crohn's disease. The presence of rs10758669 (AC) was protective against perianal Crohn's disease (p=0.016). Additionally, rs10758669 and rs2293152 in Crohn's disease and rs8074524, rs3816769, and rs10758669 in ulcerative colitis were associated with the requirement of immunsuppression. Finally, rs8074524 and rs10758669 in Crohn's disease and rs11209026 in ulcerative colitis were associated with disease-related operation. Conclusion: This is the first study of the single marker association of IL23R, JAK2, and STAT3 polymorphisms with ulcerative colitis and Crohn's disease in a Turkish population. It was demonstrated that these polymorphisms may be effective in the etiology of inflammatory bowel disease in this Turkish population.Scientific Investigation Support Committee of Trakya University (TUBAP), Edirne, Turkey [TUBAP-2013/107]This study was supported by fund from the Scientific Investigation Support Committee of Trakya University (TUBAP), Edirne, Turkey [TUBAP-2013/107]
