|Letters to the Editor:|
About the Name of the 114th Element [In Bulgarian]
Full text: PDF (324 K)
Intuition and Imagination in Scientific Research [In Bulgarian]
Full text: PDF (226 K)
|Education: Theory & Practice:|
Comparing Education and Career Aspirations, Expectations and Skills of Chemistry and Pharmacy Freshmen [In Bulgarian]
Full text: PDF (877 K)
|I. Hadjiali, N. Raycheva, N. Tzanova|
Study of Professional Reflection of Biology Teacher: Part I [In Bulgarian]
Full text: PDF (562 K)
|N. Raycheva, I. Hadjiali, N. Tzanova, V. Necheva|
Study of Professional Reflection of Biology Teacher: Part II [In Bulgarian]
Full text: PDF (1245 K)
|G. Kossekova, T. Monova, B. Georgieva|
Significance of the Interactive Clinical Cases with Virtual Patients for Learning Medical Biochemistry
Full text: PDF (258 K)
|M. Firdaus, Patiha|
Determination of Activation Energy in Non-Isothermal Chemical Kinetics
Full text: PDF (738 K)
|W. Sumranwanich, Art-in, P. Maneechom, C. Yuenyong|
Existing Nature of Science Teaching of a Thai In-Service Biology Teacher
Full text: PDF (213 K)
|G. N. Golemshinski|
Meteorite Hunting and Physics Education
Full text: PDF (192 K)
Assessment of the Qualities of Teaching Experiments which Illustrate the Greenhouse Effect
Full text: PDF (330 K)
|Foreign Educational Tradition:|
|M. M. Holovkova, A. A. Korobchenko|
The Influence of the Natural Sciences Component of Education Content on the Educational Process Organization in Ukrainian Schools of General Education in the Second Half of the 19th Century
Full text: PDF (221 K)
|From the Research Laboratories:|
|F. Faiku, A. Haziri, F. Gash, N. Troni|
Nutrient Composition of Cucurbita Melo Growing in Kosovo
Full text: PDF (659 K)
|History and Philosophy of Science:|
The Wine in Ancient and Modern Times [In Bulgarian]
Full text: PDF (2191 K)
|New Information Media:|
Relation "Educational Paradigms - Information and Communication Technologies" in the Context of E-Learning [In Bulgarian]
Full text: PDF (363 K)
Awards Golden Clover for 2016 [In Bulgarian]
Full text: PDF (1581 K)
Khimiya, Volume 25, Issue 3(2016)
Khimiya. 25, 331-347 (2016) Author(s): A. Gendjova:
Abstract.This article presents a two-year study of non-cognitive input features of 210 freshmen in Chemistry and Pharmacy at Sofia University. The survey seeks information about: the students goals (aspirations), education and work; motives (reasons) for the selection of a university; expectations for higher education and self-assessment of academic-related skills. Comparing the responses from chemistry students with those of pharmacy students demonstrates differences in the following areas: the homogeneity of career goals; connections between career and educational goals with the labor market; types of motives; type and level of expectations, and self-assessment of personal skills. Interesting results were obtained when comparing the most developed skills, declared by chemistry freshmen with the most important career skills according to employed chemistry alumni (Gendjova & Kamusheva, 2012). The study enables future research on the subject and practical application.
Keywords: freshmen, aspirations, expectations, skills, chemistry, pharmacy, higher education
Khimiya. 25, 348-361 (2016) Author(s): I. Hadjiali, N. Raycheva, N. Tzanova:
Abstract.In the article are presented some basic theoretical understandings of professional pedagogical reflection – defining, structure and development. In order to research professional teacher’s reflection adequate methodology, is constructed and described as a determinant of professional career.
Keywords: professional reflection, reflection, pedagogical skills
Khimiya. 25, 362-380 (2016) Author(s): N. Raycheva, I. Hadjiali, N. Tzanova, V. Necheva:
Abstract.The article presents results from actual survey on professional reflection of the biology teacher. The sample size includes 185 teachers from 13 regions in Bulgaria. The questionnaire survey’s results are processed by using a descriptive statistics and correlation analysis(Spearman – Brown’s coefficient).
Keywords: professional reflection, reflection, skill
Khimiya. 25, 381-389 (2016) Author(s): G. Kossekova, T. Monova, B. Georgieva:
Abstract.The present paper describes the significance of 13 interactive clinical cases with virtual patients for learning Medical Biochemistry. The cases have been gradually created as part of the Web-based course “Interactive Biochemistry - Sofia” taught in English and Bulgarian language at the Medical University of Sofia. These interactive clinical cases serve as specialized tests to check as a whole creativity, problem-solving skills and decision-making skills. They are useful for illustrating different theoretical topics and creating links within and between Biochemistry topics and different diseases or clinical conditions. With their Web-based form they fit close to the style of perception of the students of today. The cases are free for educational purposes and are available online and on digital versatile disk – DVD. They are dedicated to the following socially important clinical problems: sickle cell anemia, myocardial infarction, poisoning with dinitrocresol, galactosemia, glycogen storage disease type V (McArdle’s disease), diabetes mellitus type 1, hypoglycemia, hypercholesterolemia, phenylketonuria, Parkinson’s disease, gout, viral hepatitis and IgA myeloma.
Keywords: interactive clinical cases, virtual patients, medical Biochemistry
Khimiya. 25, 390-393 (2016) Author(s): M. Firdaus, Patiha:
Abstract.An alternative on the determination of activation energy in non-isothermal chemical kinetics is described.
Keywords: bromine, activation energy, chemical kinetics
Khimiya. 25, 394-405 (2016) Author(s): W. Sumranwanich, Art-in, P. Maneechom, C. Yuenyong:
Abstract.The paper aimed to investigate the existing nature of science (NOS) teaching in Thailand biology classroom. Participants included Thai in-service biology teacher classrooms in Udontani province, Thailand. Methodology regarded interpretive paradigm. Tools of interpretation included 2 months of classroom observation, interviewing, and questionnaire of NOS. The findings will clarify each case of classroom about (1) teachers’ understanding of NOS, and (2) what aspects of NOS were presented and how they enhanced students’ to understand NOS in biology learning. The paper has implication for professional development on NOS teaching in Thailand.
Keywords: nature of science, biology, professional development
Khimiya. 25, 406-414 (2016) Author(s): G. N. Golemshinski:
Abstract.In the recent years meteorite hunting has turned to a well-known recreational
activity and has become popular among children and the youth. Being such a tempting area of practice, meteorite prospecting draws attention and brings
pleasure to the involved individuals thus predisposing them to get acquainted with the hidden secrets and underlying nature of meteorites and the methods and physical laws that make finding meteorites using machines possible. The current article tries to explain why meteorite hunting may attract students to physics and help them better understand certain phenomena of astrophysics and physics. The student may learn much about meteorite structure, chemistry, astrophysical origins, meteoroid entry into Earth atmosphere and its consequential mechanical dispersion, and finally and most importantly the physics of electromagnetism, on which are based the modern meteorite searching metal detectors.
Keywords: meteorite hunting, physics education
Khimiya. 25, 415-427 (2016) Author(s): A. Angelacheva:
Abstract.The contemporary state strategy for education in Bulgaria focuses natural science education on forming and developing individuals with strong understanding of ecology. In the context of educational strategy, the school subject Chemistry and Environment is taught from 7th to 12th grade. A review of the curriculum in the relevant textbooks indicates an absence of experimental activity related to the global environmental problems. A step in this direction is this paper which presents some of the selected and developed teaching experiments for illustration one of the global environmental problems – the intensification of the greenhouse effect on Earth. The qualities of the teaching experiments are examined through an expert assessment and in a representative sample of students in the 9th grade in experimental education conditions. For the purposes of the survey, two students’ groups are formed – control and experimental. They are chosen at random by two independent samples of students (40 in each group) with similar results incoming testing for ecological culture. The cognitive performances of students are established by outgoing testing for ecological culture. The data show that the developed teaching experiments provide good conditions to enrich students’ ecological culture and they can be used effectively in secondary school chemistry education.
Keywords: teaching chemical experiment, greenhouse effect, environmental education, ecological culture
Khimiya. 25, 428-437 (2016) Author(s): M. M. Holovkova, A. A. Korobchenko:
Abstract.It is proved that the school education content was associated with the science development of that time by the teachers of the second half of the 19th century. The essence of scientific discussions on advantages and disadvantages of the theories of formal and material education in the studied period is characterized. The role of the first congresses of natural scientists and teachers in carrying out the issues, connected with determining the education content in general and natural sciences in particular, is revealed. It is proved that the natural sciences component of education content exercised an essential influence on the organization of the educational process in Ukrainian schools of general education in the second half of the 19th century, in particular – on the methodology of teaching the disciplines, on a choice of forms and methods of teaching.
Keywords: science, education, school of general education, natural science component of education process
Khimiya. 25, 438-447 (2016) Author(s): F. Faiku, A. Haziri, F. Gash, N. Troni:
Abstract.Pumpkins have considerable variation in nutrient contents depending on the cultivation environment, species, or part. Lipids, proteins, carbohydrates, moisture, ash and minerals, were quantitatively determined from the Cucurbita melo growing in Obiliq (a city in central Kosovo) and Peja (a city in western Kosovo). Total proteins were analyzed, by Kjeldahl method, in flesh, skin, and seeds in Cucurbita melo growing in Obiliq and Peja. The levels of total proteins (in Obiliq) in flesh, skin and seed are 0.80 %, 1.83 %, 13.7 %, respectively. The levels of total proteins (in Peja) in flesh, skin and seed are 0.60 %, 1.53 %, 12.7 %, respectively. Lipids are analyzed by Soxhlet extraction in flesh, skin, and seed. The mean levels of lipids (in Obiliq) in flesh, skin and seeds are 0.10 %, 0.30 %, 19.4 %, respectively. The levels of total proteins (in Peja) in flesh, skin and seeds are 0.10 %, 0.80 %, 14.0 %, respectively. The mean levels of carbohydrates (in Obiliq) in flesh, skin and seeds are 20.1 %, 12.8 %, 6.90 %, respectively. The levels of total carbohydrates (in Peja) in flesh, skin and seeds are 17.0 %, 16.10 %, 18.3 %, respectively. The mineral content was studied and analyzed by flame atomic absorption spectrometry. Seven elements, iron, copper, zinc, magnesium, calcium, sodium and potassium were determined in Cucurbita melo. From our investigation we can conclude that Cucurbita melo growing in Obiliq, contains more potassium than other elements. The potassium is more concentrated in skin than other parts of Cucurbita melo. Cucurbita melo growing in Peja, contains more calcium than other elements. The calcium is more concentrated in skin than other parts of Cucurbita melo.
Keywords: Curcubita melо, protein, mineral, carbohydrate, skin, seed, flesh
Khimiya. 25, 448-458 (2016) Author(s): I. Kuleff:
Abstract.The present paper tells the history of wine produced by fermentation of the grapes. Grapes ferment without the addition of sugars and convert to ethanol (C2H5OH) and carbon dioxide (CO2). The earliest evidence of wine to date was found in Caucasus but also in Mesopotamia. Archaeological evidence has established the earliest-known production of wine from fermenting grapes during the late Neolithic site of Hajji Firuz in the northern Zagros Mountains. In the paper was given also the compounds which are characteristic for the wine and the methods of discovering them.
Keywords: wine, production, history, chemical analysis of wine
Khimiya. 25, 459-469 (2016) Author(s): K. Yotovska:
Abstract.The topic in the article are the ideas of different educational paradigms that find their materialization in the information and communication technologies design and different approaches to be integrated in a specific educational context. The recent research has shown unequivocally that the globally dominated theoretical and methodological basis of e-learning is the constructivism with its theoretical varieties and the appropriate practical solutions. Constructivist educational philosophy and paradigm has been adopted as a methodology to the e-learning design. Relations "educational paradigms - information and communication technologies" are not constant. The evolution of the relation of booth elements of the relation results in dynamic and developing relationships.
Keywords: educational paradigms, e-learning, information and communication technology, design