Publications by authors named "O S Lavrukova"

15 Publications

[On the possibility of luminol solution usage to detect the blood traces when examining the scene].

Sud Med Ekspert 2021 ;64(5):53-56

Academician I.P. Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia.

Objective - to present a comparative analysis of the specialized literature on the possibility of using a luminol solution to detect blood traces when examining the scene of an incident. The use of this sample at the incident scene is only preliminary, since its high sensitivity connected with nonspecific properties. Information about the possibility of identifying the species, group and DNA belonging of blood traces after their treatment with a luminol solution is contradictory, therefore, its use at the scene should be careful with the preservation of intact (not treated with luminol) blood traces available for their study by traditional forensic biological methods. The possibility of laboratory determination of the properties of blood after processing its traces with a luminol solution can be proved by a special scientific and experimental forensic biological work.
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http://dx.doi.org/10.17116/sudmed20216405153DOI Listing
October 2021

[Features of physiological groups of microorganisms - participants in the diagenesis of bone remains].

Sud Med Ekspert 2021 ;64(5):41-45

Petrozavodsk State University, Petrozavodsk, Russia.

Objective - to study the diversity of physiological groups of microorganisms that control the transformation of bone remains in nature. Traditional microbiological methods were used to study the cytological, physiological, biochemical and environmental properties of microorganisms isolated from the bone remains of 8 of 14 physiological groups of microorganisms - participants of diagenesis are established: ammonifiers, nitrifying bacteria, bacteria decomposing cellulose, causative agents of lactic acid and acetic acid fermentation, nitrogen fixators and denitrifying bacteria. Most of the identified physiological groups are in constant dynamics that is probably due to the uneven distribution in the soil of organic substances formed at different times in the process of microbial transformation of bone fragments. The analysis of qualitative and quantitative characteristics of these microorganisms' groups makes it possible not only to assess the intensity of the processes taking place over time but also to define the dependence on environmental factors such as soil acidity and ambient temperature. The results obtained can be used to obtain reliable data in forensic medical examination to solve issue about the prescription of death or the term of burial of bone remains.
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http://dx.doi.org/10.17116/sudmed20216405141DOI Listing
October 2021

[On the question of justifying the choice of a model-object for studying the dynamics of impedance in the postmortem period].

Sud Med Ekspert 2021 ;64(5):36-40

Petrozavodsk State University, Petrozavodsk, Russia.

Objective - to compare the temporal dynamics of the tissue impedance of human and pig corpses under the same conditions to substantiate the further use of pig corpses as model objects. At the first stage, we studied the tissue impedance values obtained on 4 pig cadavers with a known date of death measured with a Keysight U1731 parting. The necessity of using a model object for studying the dynamics of impedance in the postmortem period has been substantiated. An exploratory analysis was carried out that allows to put forward a hypothesis about the existence of the impedance values (absolute indicators) and dispersion coefficients (relative indicators) dependence on the time of death, and also suggests that the combination of impedance values and the corresponding coefficients can be used to judge its duration for the objects under study.
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http://dx.doi.org/10.17116/sudmed20216405136DOI Listing
October 2021

[On the issue of a comprehensive diagnosis of death coming in the late postmortem period].

Sud Med Ekspert 2021 ;64(4):30-36

Petrozavodsk State University, Petrozavodsk, Russia.

According to specialized literature and the results of our own experiments to carry out a comprehensive study to find criteria for determining the time of death in the late postmortem period. It turned out that a combined assessment of microbiological, entomological and biophysical data obtained in the study of a corpse is advisable for medical diagnostics of the duration of the postmortem interval, which does not exclude the need to compare them with the results obtained by traditional morphological methods. From an applied point of view, it is very important to Ā«standardizeĀ» the conditions of such studies. For an in-depth study of the nature of cause-and-effect relationships of phenomena occurring in biological tissues in the late postmortem period, it is very interesting to perform microbiological, entomological and biophysical studies under different environmental conditions, but according to a single program and on a single methodological basis.
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http://dx.doi.org/10.17116/sudmed20216404130DOI Listing
July 2021
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