The purpose of this study, which is designed in quasi-experimental model, is to examine the effect of the thinking aloud strategy on the reading comprehension skills of the 4th grade primary school students. For this purpose, in the second semester of 2016-2017 academic year, the reading comprehension levels of 26 students in the 4th grade at a primary school located in the central district of Turkey's Bartın province were determined by applying a pre-test. Among the two classes, whose reading comprehension levels were equal, one class was assigned as the experimental and the other as the control group in an objective manner. In the research; Reading Comprehension Test 1, which included questions about the text 'Edison Invents the Light Bulb' developed by Sulak (2014); and the Reading Comprehension Test 2, which included questions about the text 'Everything Started with a Kite' developed by the researcher were used as data collection tools. The data obtained in the study were transferred to the SPSS 18 software pack; and statistical procedures such as arithmetic average, frequency, percentage, standard deviation, Mann Whitney U, Wilcoxon Marked Rank Test were performed on the data, in the direction of the questions in the research. As the result of the research, it was concluded that there was a significant difference between the pre-test and post-test scores, in favor of the post-test scores of the experimental group students who were taught the thinking aloud strategy.
Purpose
The purpose of this paper is to enhance the limited fluorescence of mica titania (MT) effect pigments by coating them with peripherally substituted zinc phthalocyanines (ZnPc).
Design/methodology/approach
The effects of deposition medium, temperature, time, initial organic pigment/MT ratio on deposition behaviour and efficiencies were investigated separately for ZnPc, nitro (TNZnPc) and amino (TAZnPc) substituted ZnPc’s.
Findings
TNZnPc could be deposited in the form of well-defined crystals on MT with per cent 64 ± 5 efficiency in chloroform at 50°C within 5 h and the amount deposited was linearly dependent on the initial TNZnPc concentration. TNZnPc fluorescence emissions, which appear mainly at 460 and 685 nm in pure pigments, could be observed in combination with MT (MT-TNZnPc) as well. A spectral analysis on the non-overlapping region of the spectrum with two different excitations (385 and 630 nm) revealed that, respectively, up to threefold to sixfold increase is possible to attain, depending on the excitation wavelengths.
Research limitations/implications
Efficiency of deposition could not be taken above per cent 11 ± 4 with TAZnPc. Although ZnPc could be deposited with per cent 57 ± 3 efficiency, the pigment was not effective in imposing its fluorescence characteristics over MT.
Originality/value
Combining inorganic effect pigments with organic dye molecules is an idea that has been elaborated mainly for producing different colour effects and stabilization of dye molecules against agglomeration. Here, for the first time, it is used to enhance the fluorescence of the effect pigments.
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