On the Lucas Difference Sequence Spaces Defined by Modulus Function

In this paper, firstly, we define the Lucas difference sequence spaces by the help of Lucas sequence and a sequence of modulus function. Besides, we give some inclusion relations and examine geometrical properties such as Banach-Saks type p, weak fixed point property

Süleyman Nazif

Taha Toros Arşivi, Dosya No: 240-240/A-Süleyman Nazif. Not: Kitap İstanbul Şehir Üniversitesi Kütüphane Koleksiyonunda mevcuttur

Effects of Methyl Jasmonate and Putrescine on Tryptanthrin and Indirubin Production in in vitro Cultures of Isatis demiriziana Mısırdalı

Tryptantrin and indirubin are pharmacologically active compounds used in treatment of disseases such as cancer and Alzheimer's. In this study, we investigated the influences of different concentrations of methyl jasmonate (MeJa) and putrescine (Put) on tryptanthrin and indirubin production in leaf explants and development of Isatis demiriziana Mısırdalı grown in vitro. In all media treated with methyl jasmonate, tryptanthrin production in leaves of plantlets showed an increase. The highest increase in tryptanthrin production was observed in solid Murashige-Skoog (MS) medium containing 1.0 mM MeJa (154.026 ± 0.11 µg g-1), about 2.85-fold higher than the control (untreated plantlets) (40.017 ± 0.031 µg g-1). Production of tryptanthrin decreased about 2.56-fold in the leaves of plantlets treated with Put, when compared to control. The highest indirubin production was obtained in the leaves of plantlets grown in the MS medium containing 0.1 mM MeJa (11.274 ± 0.035 µg g-1) but treatments with Put didn’t show any positive affect on the indirubin production. Analysis of tryptanthrin and indirubin were performed using high performance liquid chromatography (HPLC)

Cases of science professors' use of nature of science

Study provides qualitative analysis of data that answers the following research question: how college science faculty teach science and NOS and incorporate aspects of NOS and the history of science into their undergraduate courses? Study concentrates on four cases and more specifically on three introductory science classes and on four instructors who taught those courses. These instructors were chosen as case studies to explore in greater detail what occurs inside introductory science courses in one particular higher institution in the Northeastern United States. Participants' teaching styles are presented through a combined and detailed presentation of interview data and classroom observations supported with examples from their classroom activities. Constant comparative approach was used in the process of organizing and analyzing data. Findings revealed that participants preferred to use the traditional teacher-centered lecturing as their teaching style and whose main concern was to cover more content, develop the problem solving skills of their students, and who wanted to teach the fundamental principles of their subjects without paying special importance to the NOS aspects. The study also revealed that other variables of teaching science, such as large class size, lack of management and organizational skills, teaching experience, and instructors' concerns for students' abilities and motivation are more important for these scientists then teaching for understanding of NOS

Disco Dancing and Kinetic Theory

Many science educators see teachers' professional development as the most critical and complex variable in the science education reform movement (1, 2) (ref 3, as cited in ref 4). The National Research Council (NRC) standards (5) state,“since the current reform effort requires a substantial change in how science is taught, an equally substantive change is needed in professional development practices” (p 56 in ref 5). The goal of teacher education programs should not be to indoctrinate or train teachers to behave in prescribed ways, but to educate teachers to reason soundly and scientifically about their teaching as well as to perform skillfully (ref 6, as cited in ref 7)

The Role of General Self-efficacy on Academic Integrity

The present study firstly, aimed to investigate pre-service teachers perceptions of general self-efficacy (GSE hereafter) and academic integrity (AI hereafter). Secondly examined whether there was a relationship between general self-efficacy and academic integrity in the Turkish pre-service teacher education context through descriptive statistics and correlation analysis. The study was conducted at an English Language Teaching (ELT) Department at a state university with the participation of 63 4th year students. The analysis of data revealed that the group of pre-service teachers have a moderate mean value related to GSE. As for AI the group scores revealed that mostly tendency to dishonesty in references took place. Positive low correlation was found between GSE and tendency to dishonesty in references. The study was carried out with a small number of participants. Further studies may be carried out with number of participants to make generalizations. Findings of the study reflect the case at a state university ELT department. The study may be repeated with qualitative study to enhance the findings of the quantitative data

An IBSP Description of Sanskrit /n/-Retroflexion

Graf and Mayer (2018) analyze the process of Sanskrit /n/-retroflexion (nati) from a subregular perspective. They show that nati, which might be the most complex phenomenon in segmental phonology, belongs to the class of input-output tier-based strictly local languages (IO-TSL). However, the generative capacity and linguistic relevance of IO-TSL is still largely unclear compared to other recent classes like the interval-based strictly piecewise languages (IBSP: Graf, 2017, 2018). This paper shows that IBSP has a much harder time capturing nati than IO-TSL does, due to two major shortcomings: namely, the requirement of an upper bound on relevant segments, and a lack of descriptive succinctness

Effect of Silver Nanoparticles on Production of Indole Alkaloids in Isatis constricta

Silver nanoparticles (AgNPs) are widely used in many applications of biotechnology, including medicine and agriculture. They are released to the nature as waste materials, which can cause physiological and biochemical effects on plants. Indigo, indirubin and tryptanthrin are valuable indole alkaloid compounds in Isatis constricta due to both medicinal effects and dye properties. This research was conducted to determine the effects of different concentrations (0, 0.25, 0.5, 1, 1.5 and 2 mg L-1) of AgNPs on the production of indigo, indirubin and tryptanthrin compounds in leaves of in vitro grown shoots of I. constricta Davis. Indigo production was 1.15-fold of control (869 +/- 8.33 mu g g(-1)) in the leaves of shoots regenerated in Murashige and Skoog supplemented with 2 mg L-1 of AgNPs (1003 +/- 11.42 mu g g(-1)) on 5 days post-treatment. Tryptanthrin production showed an increase in all applications of AgNPs, but the highest increase was observed at a concentration of 2 mg L-1 (4.59 +/- 0.046 mu g g(-1)) and this increase was 1.71-fold of control (2.68 +/- 0.031 mu g g(-1)) on 5 days post-treatment. The production of indigo and tryptanthrin decreased on 10 and 15 days post-treatment with AgNPs. The contents of indirubin decreased during day 5-10-15 and at all concentrations of AgNPs compared to the control

TURKISH STUDENTS’ VIEWS ON NATURE OF SCIENCE

This paper explored students' views on nature of science using qualitative research techniques, mainly in-depth individual interviews. Sample consisted of 18 students enrolled on 7th grade in a small public school in northeastern Turkey. Findings revealed that students had mixed views on nature of science, as it is the case with the scientific community today. Students held contemporary views about some aspects of NOS and traditionalist views about other aspects. This study calls for improving the teaching of NOS in Turkish middle school science classrooms.   Article visualizations

Cahit Arf

Taha Toros Arşivi, Dosya No: 357-Cahit Arf. Not: Cahit Arf'ın anısına Bilim ve Teknik Aylık Popüler Bilim Dergisi'nin 363. sayısının ekidir.Unutma İstanbul projesi İstanbul Kalkınma Ajansı'nın 2016 yılı "Yenilikçi ve Yaratıcı İstanbul Mali Destek Programı" kapsamında desteklenmiştir. Proje No: TR10/16/YNY/010