THE INTELLECTUAL REFLECTION OF 15 – 17 YEARS-OLD STUDENTS IN THE TEACHING OF „BIOLOGY AND HEALTH EDUCATION“: LEVELS AND TRENDS OF DEVELOPMENT

The study was aimed at identifying possible levels at which the intellectual reflection manifests in secondary students from grade 9th to 11th and trends in its development during a three-year experimental teaching in „Biology and health education“. The metho...

CHIMERICAL GROUPS IN SCHOOL AS A SOCIAL AND EDUCATIONAL PHENOMENON

The problem discussed is related to the need for clear sociopedagogical parameters of (criminal groups) gangs in schools. The different interpretations link them to difficult children, youth subcultures, and street gangs while chimerical groups are a possi...

“SYMBOLIC CAPITAL” OF THE BULGARIAN SCHOOL

This study is influenced by the ideas of the French sociologist Pierre Bourdieu. The assumption is that the external differentiation of the school system conceals a social selection of students, teachers and parents. On an empirical level, the answer to the q...

IUPAC APPROVED PERMANENT NAMES OF THE CHEMICAL ELEMENTS 113, 115, 117 AND 118: THE SEVENTH PERIOD OF THE PERIODIC TABLE OF THE CHEMICAL ELEMENTS IS COMPLETED

After the fulfilment of the IUPAC criteria for the discovery of new elements, the priority for the discovery of element 113 has been judged to the RIKEN collaboration team in Japan, the priority for the discovery of elements 115 and 117 – to the Dubna – Live...

WEB-BASED DIAGNOSTIC TEST: INTRODUCING ISOMORPHIC ITEMS TO ASSESS STUDENTS’ MISCONCEPTIONS AND ERROR PATTERNS

The misconceptions and error patterns of students are crucial to assess in order to support effective physics learning. However, exploring students’ misconceptions and error patterns is not easy. A web-based diagnostic test is an alternative approach to hel...

KINETICS OF PHOTO-ELECTRO-ASSISTED DEGRADATION OF REMAZOL RED 5B

This research studies a kinetics of photo-electro-assisted degradation of dyes. The kinetics study applied the Buttler-Volmer kinetics for electro-assisted reaction in combination with the regular chemical kinetics for photodegradation. The result then being...

COMPARISON STUDY OF DIFFERENT INORGANIC SILICA BASED REINFORCEMENT KAOLIN AND 3-GLYCYDILOXYPROPYLTRIMETHOXYSILANEON MECHANICAL, WATER UPTAKE AND SWELLING AREA PROPERTIES OF CHITOSAN COMPOSITES

The blending of chitosan with different types of silica-based reinforcement materials, kaolin clay and (3-glycidyloxypropyl) trimethoxysilane via solution casting method had been carried out. This study was focused on the mechanical, water uptake and swell...

SIMPLE TECHNIQUE FOR DETERMINING THE FORWARD RATE CONSTANT OF REVERSIBLE REACTION

The forward rate constant of reversible reactions can be used to estimate the concentration of the reactants at a given time (and then the products by using stoichiometric coefficients), to control the quality of the products, to calculate the backward rate...

FORGOTTEN BULGARIAN TEACHERS: SIMEON HRISTOV

A biographical sketch of Simeon Hristov (1852 – 1910) is presented. The author of the present article advocates for using by pupils and teachers “historical trips” in the past in order to overcome the cultural trauma, which is a feature of the modern educatio...

ALLELOPATHIC AND IN VITRO ANTICANCER ACTIVITY OF STEVIA AND CHIA

Stevia rebaudiana (Bertoni) Bertoni (Asteraceae) and Salvia hispanica L. (Lamiaceae) (chia) are functional foods used worldwide today. Additionally, aerial parts of both plants contain valuable secondary metabolites. Chemical composition of stevia and c...

NOVEL HETEROARYLAMINO-CHROMEN-2-ONES AND THEIR ANTIBACTERIAL ACTIVITY

A series of heteroarylamino-chromen-2-ones 4(a-c) were synthesized by condensationreactions under catalytic conditions. 5-(3-Nitro-2-oxo-2H-chromen4-ylamino)-3H-imidazole-4-carboxamide <b>4a</b>, 4-(7-Hydroxy-5-methyl-[1,8]naphthyridin-2-ylamino)-3-nitrochro...

ONE DECADE OF THE “LUSI” MUD VOLCANO: PHYSICAL, CHEMICAL, AND GEOLOGICAL DIMENSIONS

In this article, we have raised more recent phenomenon of mud volcano disaster since May 2006 until now in Sidoarjo, East Java- Indonesia. This rare occurrence has invited the public to enjoy, even for scientist as a mean of doing research or for public as...

ОСНОВИ НА ОБЩАТА МЕТОДИКА ПО ЕСТЕСТВОЗНАНИЕ – 1925 Г.