Forensic medical assessment of cerebral infarction, hemorrhagic hemorrhages of traumatic genesis and determination of the duration of their formation methods of spectral-selective laser-induced direct polarization-phase tomography

2021 ◽  
Author(s):  
M. Garazdyuk ◽  
V. Bachinskiy ◽  
Yuriy Ushenko ◽  
P. Gorodenskiy ◽  
V. Gantyuk ◽  
...  
Keyword(s):  
Cerebral Infarction ◽  
Medical Assessment ◽  
Direct Polarization ◽  
Polarization Phase

Effect of thiol oxidation and thiol export from erythrocytes on determination of redox status of homocysteine and other thiols in plasma from healthy subjects and patients with cerebral infarction

1995 ◽  
Vol 41 (3) ◽  
pp. 361-366 ◽  
Author(s):  
A Andersson ◽  
A Lindgren ◽  
B Hultberg
Keyword(s):  
Cerebral Infarction ◽  
Healthy Subjects ◽  
Redox Status ◽  
Reduced Form ◽  
Temperature Dependent ◽  
First Order ◽  
First Order Kinetics ◽  
Before And After ◽  
Reduced Forms

Abstract Changes in concentration of reduced and oxidized low-M(r) thiols were measured in blood and plasma before and after the separation of blood cells. If centrifugation of blood was postponed, the reduced form of homocysteine in plasma increased with time at 22 degrees C; in contrast, the concentrations of other reduced thiols (cysteine, glutathione, and cysteinylglycine) decreased. In plasma the reduced forms of all thiols disappeared at a rate that followed first-order kinetics. The rates of disappearance ("half-lives") were temperature-dependent; they were about the same for glutathione and homocysteine (11.7 and 14.3 min, respectively, at 22 degrees C) and somewhat higher for cysteinylglycine and cysteine. After establishing proper sampling conditions for reduced thiols, we measured this thiol fraction as well as free (non-protein-bound) and total thiols in 10 reference subjects and 19 patients with cerebral infarction. Mild but significant hyperhomocysteinemia involving total and free homocysteine (but not reduced homocysteine) was found in the patients.

scholarly journals Forensic medical determination of harm caused to human health in environmental crime cases

2021 ◽  
Vol 7 (3) ◽  
pp. 186-192
Author(s):  
Semyon V. Kuznetsov ◽  
Yuri A. Molin ◽  
Sergey Yu. Melikhov
Keyword(s):  
Human Health ◽  
Causal Relationship ◽  
Anthropogenic Impacts ◽  
Environmental Crime ◽  
Medical Assessment ◽  
New Approach ◽  
New Approaches ◽  
Environmental Crimes

The article describes one of the most urgent needs of the investigation the development of a fundamentally new approach to the forensic medical assessment of harm to human health caused by environmental crimes. Th e special signifi cance of new approaches to establishing a causal relationship between a committed environmental off ense and harm to life and (or) health, including for distinguishing from other possible anthropogenic impacts, is shown. A practical example of expert assistance to the investigation in establishing the circumstances to be proved during the investigation of an environmental crime is given.

scholarly journals Albedo and size of (99942) Apophis from polarimetric observations†

2006 ◽  
Vol 2 (S236) ◽  
pp. 451-454 ◽  
Author(s):  
Alberto Cellino ◽  
Marco Delbò ◽  
Edward F. Tedesco
Keyword(s):  
Accurate Determination ◽  
Absolute Magnitude ◽  
Phase Curve ◽  
Efficient Tool ◽  
A Value ◽  
Size Estimate ◽  
The Absolute ◽  
Polarization Phase

AbstractWe have obtained the first accurate determination of the albedo of (99942) Apophis, by means of polarimetric observations carried out at the VLT. The observations allowed us to obtain the slope of the polarization–phase curve of this object, from which an albedo estimate of 0.33 ± 0.04 could be obtained. From our observations we also obtained a new estimate of the absolute magnitude: H = 19.7 ± 0.2 (assuming G=0.25, which applies to S- and Q-type asteroids). Based on these results, we derive for the size of Apophis a value of 270 ± 30 meters. The accuracy of this size estimate is mostly related to uncertainties in H, whereas the obtained albedo value should be considered more robust. Our observations convincingly show that polarimetry is an effective and efficient tool to obtain accurate albedos and sizes for small and faint potentially hazardous asteroids.

scholarly journals Determination of platelet function in patients with cerebral infarction on antiplatelet therapy

1993 ◽  
Vol 39 (1) ◽  
pp. 65-72
Author(s):  
TADATOSHI KOMIYA ◽  
MANABU KUDO ◽  
TAKAO URABE ◽  
YOSHIKUNI MIZUNO
Keyword(s):  
Cerebral Infarction ◽  
Antiplatelet Therapy ◽  
Platelet Function

scholarly journals Temporal dynamics of change of polycrystalline component of bioctisses and blood of death from poisoning by alcohol and carbon with different time since death

2021 ◽  
pp. 63-73
Author(s):  
Ihor Ivaskevych ◽  
Oleh Vanchulyak ◽  
Yurii Ushenko ◽  
Artem Motrich
Keyword(s):  
Adrenal Glands ◽  
High Efficiency ◽  
Temporal Dynamics ◽  
Carbon Monoxide Poisoning ◽  
Analytical Determination ◽  
Linear Birefringence ◽  
Internal Organs ◽  
Linear Change ◽  
Polarization Phase

The article contains the results of a study of the effectiveness of forensic medical determination of the prescription of death by the method of differential Müller-matrix polarization-phase tomography, which is implemented by multichannel probing of rhizopolarization with laser beams of histological sections of the brain, myocardium, adrenal glands, liver and blood of the deceased and multichannel polarization filtration series images with algorithmic reproduction (reconstruction) of coordinate distributions (tomograms) of the average linear birefringence (LD) of polycrystalline networks. Aim of the work. Efficiency study by the method of differential Müller-matrix polarization-phase tomography for determining the duration of death. Materials and methods. The object of the study was the histology of samples of human internal organs (brain, myocardium, adrenal glands, and liver) with different duration of damage from 6 hours to 48 hours (we used BT samples from those who died from alcohol poisoning and carbon monoxide poisoning). For control, we used BT samples from those who died from ischemic heart disease with different duration of damage from 6 hours to 48 hours. The studies were carried out using the method of differential Muller-matrix polarization-phase tomography. Results. The range of linear change in the magnitude of the higher-order statistical moments, and accordingly the analytical determination of the DNS, lies in the range from 20 hours to 48 hours. The accuracy of determining the DNS is also significantly improved and amounts to 0.5 hours. Conclusion. The high efficiency of Muller matrix algorithmic reproduction of maps of average values of birefringence of the optically anisotropic component of biological preparations of the deceased was revealed.

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