Khimiya, Volume 14, Issue 3 (2005)
Khimiya. 14, 172-178
(2005):
Abstract. The teaching
activity will gain if the psychological aspects of the process of creation are taken into
account. The steps of the creative process are listed and discussed. Some proper examples
from our school practice are given and they will be of use for stimulating the critical
thinking of the pupils.
References: 9
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Khimiya.
14, 179-195 (2005):
Abstract. Proper
definitions of basic physical quantities as an amount of substance and the corresponding
molar quantities, i.e. molar mass, molar volume and Avogadro’s constant are given and
discussed in details. The typical concepts misunderstandings concerning those quantities
are emphasized. Two new approaches to the matter are described.
References: 8
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Khimiya.
14, 196- 203 (2005):
Abstract. An information
is given both for the discovery of super heavily chemical elements with numbers 110 and
111 by Prof. Hofmann and his collaborators from the Geselschaft fuer Schwerionenforschung
mbH in Darmstadt, Germany, and about its result of naming by IUPAC of the new discovered
elements in the periodic system.
References: 12
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Khimiya.
14, 204-214 (2005):
Abstract. A reversed-phase
high-performance liquid chromatographic (RP-HPLC) method for the determination of cocaine
(COC) and benzoylecgonine (BZE) in human urine is described. The sample preparation
procedure developed involves solid-phase extraction (SPE).
The separation of the drags obtained after SPE was performed on a C-18
reverse-phase column using gradient elution with a mixture of acidified water and methanol
as mobile phase. Ultraviolet detection was carried out for both analytes. Linear
calibration curves were obtained for both analytes. The obtained values for the recovery
of both analytes range from 87,1 to 100 %, which demonstrates satisfactory accuracy of the
proposed procedure for fast and simple assay of COC and BZE in urine.
References: 12
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Khimiya. 14, 221- 229
(2005):
Abstract. The scholarly journals mark the advancement of the world
scientific process. Firstly, the ways of documenting of the scientific activity are
considered in details. The Philosophy of Science is presented in its two main versions: i)
the normal science and its paradigms after Kuhn; ii) the research programmes and their
structure after Lacatos. These contemporary ideas are applied to the modern development of
the nanoscience. When considering the nanoscience as a Lacatos’ research programme its
two particularities could be revealed: i) a possibility to link both hard science and soft
science; ii) a possibility to look for a relationship between science and religion. At the
end of the paper an argument from the History of Science is given to prove that the
difficulties of life do not decrease the creation abilities of the people of science.
References: 11
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Khimiya. 14, 230-237
(2005):
Abstract. Learning the principle of quantitative chemical analysis
requires innovative, hands-on laboratory experiences that would challenge students to
think independently about the problem. The water project described here was meant to serve
dual purposes. One of the objectives of the programme is to increase student interest and
critical thinking skills while reinforcing the concepts learnt in the classroom. The
second objective is to remind the students of the benefits derived from the society. With
a view to enrich the moral and civic values inherent in serving others, this project was
integrated into community service to form a package called “Service Learning” and this
package formed a part of the curriculum. The two-way service learning process – serving
others by applying chemical principles to real life situations and to enhance academic
objectives through the experience gained from such a service – was tested for one
academic year.
References: 8
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