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Currently, setting the obligation to use respiratory protective equipment with a level of protection of at least FFP2 in public transport and commercial and shopping centers are considered within the European Union. Many new products appeared on the European market within these specifications, and many symbols have been used. The paper deals with the meaning of selected respiratory protection based on respirators symbols and markings (which appeared massively, especially after the pandemic situation in the spring of 2020), these symbols not being uniformly understood and well communicated. We also mention and discuss some of the problems related to setting the conditions of public procurement, which affect respirators. Thus, this review is an “informative guide” in facilitating the understanding and use of full knowledge of the most appropriate respiratory protective devices in various situations.
Pavel Otrisal; Constantin Bungau; Vladimír Obsel; Zdeněk Melicharik; Gabriela Tont. Selected Respiratory Protective Devices: Respirators and Significance of Some Markings. Sustainability 2021, 13, 4988 .
AMA StylePavel Otrisal, Constantin Bungau, Vladimír Obsel, Zdeněk Melicharik, Gabriela Tont. Selected Respiratory Protective Devices: Respirators and Significance of Some Markings. Sustainability. 2021; 13 (9):4988.
Chicago/Turabian StylePavel Otrisal; Constantin Bungau; Vladimír Obsel; Zdeněk Melicharik; Gabriela Tont. 2021. "Selected Respiratory Protective Devices: Respirators and Significance of Some Markings." Sustainability 13, no. 9: 4988.
Pavel Otrisal; Vladimir Obsel; Simona Bungau; Sarka Hosková-Mayerova. Observation of Drench of Porous Barrier Materials with Employment of the Conductivity Sensor. Challenges to national defence in contemporary geopolitical situation 2020, 2020, 79 -87.
AMA StylePavel Otrisal, Vladimir Obsel, Simona Bungau, Sarka Hosková-Mayerova. Observation of Drench of Porous Barrier Materials with Employment of the Conductivity Sensor. Challenges to national defence in contemporary geopolitical situation. 2020; 2020 (1):79-87.
Chicago/Turabian StylePavel Otrisal; Vladimir Obsel; Simona Bungau; Sarka Hosková-Mayerova. 2020. "Observation of Drench of Porous Barrier Materials with Employment of the Conductivity Sensor." Challenges to national defence in contemporary geopolitical situation 2020, no. 1: 79-87.
Pavel Otrisal; Stanislav Florus; Simona Bungau; Sarka Hosková-Mayerova. Full Face Masks Construction and Main Modernization Trends. Challenges to national defence in contemporary geopolitical situation 2020, 2020, 55 -62.
AMA StylePavel Otrisal, Stanislav Florus, Simona Bungau, Sarka Hosková-Mayerova. Full Face Masks Construction and Main Modernization Trends. Challenges to national defence in contemporary geopolitical situation. 2020; 2020 (1):55-62.
Chicago/Turabian StylePavel Otrisal; Stanislav Florus; Simona Bungau; Sarka Hosková-Mayerova. 2020. "Full Face Masks Construction and Main Modernization Trends." Challenges to national defence in contemporary geopolitical situation 2020, no. 1: 55-62.
The main topic of the article is the use of multicriteria analysis in assessing the impact of the geographical environment on rescue and military activities. The evaluation is based on digital geographical data, and the influences of individual geographical factors are determined by spatial analyses. The essence of the article lies in the design of a methodical procedure for determining the weights of individual criteria and in the construction of a suitable resulting user function (utility value function) in a geographic information system environment with regard to the solved problem and in the verification of the proposed procedure. Using sensitivity analysis, the dominance of individual factors is determined, and the influence of the changes in the weights of the criteria on the overall results of the analysis is assessed. Detailed studies of the differences in the results of solving the same analytical problem with changed weights of individual criteria are performed, and these studies are documented on a model example. Based on verification tests performed both in office conditions and directly at selected locations, “optimized procedures” are recommended for assessing the potential of the geographical environment for the operation of rescue or military units in field conditions. Finally, the possibilities of further development of the model solution and its implementation into control systems are presented.
Šárka Hošková-Mayerová; Václav Talhofer; Pavel Otřísal; Marian Rybanský. Influence of Weights of Geographical Factors on the Results of Multicriteria Analysis in Solving Spatial Analyses. ISPRS International Journal of Geo-Information 2020, 9, 489 .
AMA StyleŠárka Hošková-Mayerová, Václav Talhofer, Pavel Otřísal, Marian Rybanský. Influence of Weights of Geographical Factors on the Results of Multicriteria Analysis in Solving Spatial Analyses. ISPRS International Journal of Geo-Information. 2020; 9 (8):489.
Chicago/Turabian StyleŠárka Hošková-Mayerová; Václav Talhofer; Pavel Otřísal; Marian Rybanský. 2020. "Influence of Weights of Geographical Factors on the Results of Multicriteria Analysis in Solving Spatial Analyses." ISPRS International Journal of Geo-Information 9, no. 8: 489.
A sensitive electrochemical method was used for the determination of the total phenolic content and antioxidant activity of Echinacea purpurea extracts. In this study, 3 glassy carbon electrodes (GCE) were used: one unmodified and the other two newly manufactured glassy carbon electrodes modified with carbon nanotubes (CNTs) and chitosan (CS) in different concentrations, having the following composition: 1 mg/mL CNTs/CS 5%/GCE and 20 mg/mL CNTs/CS 0.5%/GCE. The determinations were performed on 3 different pharmaceutical forms (capsules, tablets and tincture), which contain E. pururea extract from the root or aerial part of the plant. Standard chicoric and caftaric polyphenolic acids, as well as food supplements extracts, were characterized using voltammetry, in a Britton-Robinson (B-R) electrolyte buffer. The modified 1 mg/mL CNTs/CS 5%/GCE electrode has superior properties compared to the other two (the unmodified and 20 mg/mL CNTs/CS 0.5%/GCE-modified) electrodes used in the study. Echinacea tincture had the highest antioxidant capacity and the biggest total amount of polyphenols (28.72 mg/equivalent of 500 mg powder). Echinacea capsules had the lowest antioxidant capacity, but also the lowest total amount of polyphenols (19.50 mg/500 mg powder); similarly, tablets had approximately the same values of polyphenols content (19.80 mg/500 mg powder), and also antioxidant capacity. The total polyphenol content was consistent with the one indicated by the manufacturers. Pulse-differential cyclic voltammetry represents a rapid, simple and sensitive technique to establish the entire polyphenolic amount and the antioxidant activity of the E. purpurea extracts.
Florin Banica; Simona Bungau; Delia Mirela Tit; Tapan Behl; Pavel Otrisal; Aurelia Cristina Nechifor; Daniela Gitea; Flavia-Maria Pavel; Sebastian Nemeth. Determination of the Total Polyphenols Content and Antioxidant Activity of Echinacea Purpurea Extracts Using Newly Manufactured Glassy Carbon Electrodes Modified with Carbon Nanotubes. Processes 2020, 8, 833 .
AMA StyleFlorin Banica, Simona Bungau, Delia Mirela Tit, Tapan Behl, Pavel Otrisal, Aurelia Cristina Nechifor, Daniela Gitea, Flavia-Maria Pavel, Sebastian Nemeth. Determination of the Total Polyphenols Content and Antioxidant Activity of Echinacea Purpurea Extracts Using Newly Manufactured Glassy Carbon Electrodes Modified with Carbon Nanotubes. Processes. 2020; 8 (7):833.
Chicago/Turabian StyleFlorin Banica; Simona Bungau; Delia Mirela Tit; Tapan Behl; Pavel Otrisal; Aurelia Cristina Nechifor; Daniela Gitea; Flavia-Maria Pavel; Sebastian Nemeth. 2020. "Determination of the Total Polyphenols Content and Antioxidant Activity of Echinacea Purpurea Extracts Using Newly Manufactured Glassy Carbon Electrodes Modified with Carbon Nanotubes." Processes 8, no. 7: 833.
The problems of determining the protective properties of barrier materials used for the production of body surface protection products of an isolative type are very actual. These garments are expected to have long-term resistance against permeation of toxic substances. The paper deals with the study of the effect of organic solvent vapours on the changes in protective properties of selected anti-gas protective garments commonly used by the North Atlantic Treaty Organization armed forces. Permeation measurements of selected gases with integral permeameter were performed to verify their barrier properties, surface changes after exposure to selected solvents by using a 3D optical profilometer, permeation measurements for vapours of these solvents with differential permeameter, and experimental simulating the possible influence of barrier properties of garments within permeation of air. It has been shown that in the case of gases, the permeability of the studied materials increases with decreasing kinetic diameter of the penetrant molecule used. In the case of acetonitrile and isooctane vapours, permeability increased with increasing vapour concentration due to interactions between polymeric materials and molecules of organic compounds. The permeation measurements of pure vapours and air/vapour mixtures indicate that the level of interactions between the molecules of the penetrant and the material of the protective garment is not strong enough to degrade the material of the garment in such a way as to allow a greater penetration of the pollutants through it. The results of permeation experiments for gases and organic vapours showed very good barrier properties of studied chemical isolated garments.
Pavel Otrisal; Karel Friess; Martin Urban; Simona Bungau; Delia Mirela Tit; Danut-Eugeniu Mosteanu; Zdenek Melicharik; Constantin Bungau; Lotfi Aleya. Barrier properties of anti-gas military garments, considering exposure to gas organic compounds. Science of The Total Environment 2020, 714, 136819 .
AMA StylePavel Otrisal, Karel Friess, Martin Urban, Simona Bungau, Delia Mirela Tit, Danut-Eugeniu Mosteanu, Zdenek Melicharik, Constantin Bungau, Lotfi Aleya. Barrier properties of anti-gas military garments, considering exposure to gas organic compounds. Science of The Total Environment. 2020; 714 ():136819.
Chicago/Turabian StylePavel Otrisal; Karel Friess; Martin Urban; Simona Bungau; Delia Mirela Tit; Danut-Eugeniu Mosteanu; Zdenek Melicharik; Constantin Bungau; Lotfi Aleya. 2020. "Barrier properties of anti-gas military garments, considering exposure to gas organic compounds." Science of The Total Environment 714, no. : 136819.
The protection of civilians, military professionals, including specialists of the Czech Armed Forces chemical corps, specialists of the Czech Republic Fire Rescue Service chemical service and, last but not least, employees of industrial enterprises against toxic substances is a long-term priority of the responsible state administration bodies. The priorities of these state bodies are focused on protection of the civilian population and industrial workers against the effects of toxic substances and related material equipment. The current security environment is characterized by a range of threats, including the proliferation of weapons of mass destruction and the possibility of releasing industrial hazardous substances such as toxic industrial materials into the environment. It is therefore possible to talk about the phenomenon of CBRN (C-chemical, B-biological, R-radiological, N-nuclear) threats that are expressed by the existence or use of nuclear, biological or chemical means against the civilian population. Critical Infrastructure means both production and non-production systems, the malfunctioning of which would have serious implications for security, economy and the preservation of the essential scope of other essential functions of the state in crisis situations. The risk of the CBRN threat is determined by the degree of severity expressed by the constantly expanding range of entities that have or are seeking to obtain them. The aim of the chapter is to notice that barrier materials used in the branch of individual protection must be assessed in accordance with those characteristics which are connected with resistivity against the permeation of toxic compounds.
Pavel Otřísal; Šárka Hošková-Mayerová. Selected Aspects of Barrier Materials Assessment as a Part of the Reaction on Threats and Risks Connected with CBRN Problems. Developments in Advanced Control and Intelligent Automation for Complex Systems 2019, 531 -543.
AMA StylePavel Otřísal, Šárka Hošková-Mayerová. Selected Aspects of Barrier Materials Assessment as a Part of the Reaction on Threats and Risks Connected with CBRN Problems. Developments in Advanced Control and Intelligent Automation for Complex Systems. 2019; ():531-543.
Chicago/Turabian StylePavel Otřísal; Šárka Hošková-Mayerová. 2019. "Selected Aspects of Barrier Materials Assessment as a Part of the Reaction on Threats and Risks Connected with CBRN Problems." Developments in Advanced Control and Intelligent Automation for Complex Systems , no. : 531-543.
Self-medication during pregnancy continues to be an issue in developing countries due to poor medical education. The most commonly used drugs are analgesics, mainly acetaminophen (paracetamol, APAP) and, to a lesser extent, ketoprofen (KPF). The aim of the study was to establish whether there are consequences of accidental use of these two drugs during early embryogenesis. The experimental study was performed on 30 pregnant white mice, divided into three groups: a first group to which APAP was administered, a second group to which KPF was administered, and group 3 as a control group. At delivery, the baby mice were examined, and after their first parturition, they were taken into study and examined according to the established protocol. Macroscopic and microscopic examinations of the liver and kidney were performed; liver and renal changes were recorded. Regarding the fertility, the number of fetuses born to mothers that were administered APAP and KPF corresponded to the normal values recorded in this species. Microscopic changes that were found in the kidney were as follows: APAP group - necrosis of the urinary tube, vascular congestions and vascular disorders; KPF group - ectasia, especially in the medullary cavity. Microscopic hepatic changes showed in the APAP group - vascular congestions, vascular disorders and hemosiderin deposits in the Kupffer cells; in the KPF group were found - discrete vascular disorders consisting in sinusoidal capillary ectasia and vascular congestions, as well as the presence of lymphocyte conglomerates. The aforementioned lesions indicate hepatic and renal distress with variable degrees of severity, but they appear to be reversible (the longer the time from the maximum effect of the drug the lower its toxicity).
Radu E. Iacob; Daniela Iacob; Radu Dumitru Moleriu; Delia Mirela Tit; Simona Bungau; Pavel Otrisal; Selim Aleya; Claudia Judea-Pusta; Gabriela Cioca; Ovidiu Gabriel Bratu; Lotfi Aleya; Izabella Petre. Consequences of analgesics use in early pregnancy: Results of tests on mice. Science of The Total Environment 2019, 691, 1059 -1064.
AMA StyleRadu E. Iacob, Daniela Iacob, Radu Dumitru Moleriu, Delia Mirela Tit, Simona Bungau, Pavel Otrisal, Selim Aleya, Claudia Judea-Pusta, Gabriela Cioca, Ovidiu Gabriel Bratu, Lotfi Aleya, Izabella Petre. Consequences of analgesics use in early pregnancy: Results of tests on mice. Science of The Total Environment. 2019; 691 ():1059-1064.
Chicago/Turabian StyleRadu E. Iacob; Daniela Iacob; Radu Dumitru Moleriu; Delia Mirela Tit; Simona Bungau; Pavel Otrisal; Selim Aleya; Claudia Judea-Pusta; Gabriela Cioca; Ovidiu Gabriel Bratu; Lotfi Aleya; Izabella Petre. 2019. "Consequences of analgesics use in early pregnancy: Results of tests on mice." Science of The Total Environment 691, no. : 1059-1064.
Real systems approach the ideal by solving technical and physical contradictions. Optimization of system engineering (SE) is achieved when the problem is solved at the level of technical contradiction. When the problem is solved at the level of physical contradiction, the idealization of SE is achieved. Two possible ways of achieving ideality are described in this paper. The expansion process flows at the level of SE (i.e., idealization of another type), and the reduction process flows at the subsystem level (i.e., idealization of the first type). A procedure of mathematical modeling is presented for determining the level of ideality as a criterion for filtering protective suit (FPS) effectiveness, which can be used as a standard for determining the ideality of any SE.
Dusan Rajic; Radovan Karkalic; Negovan Ivankovic; Pavel Otřísal. Defining Filtering Protective Suit Ideality using a Mathematical-Modeling Method. AATCC Journal of Research 2019, 6, 18 -24.
AMA StyleDusan Rajic, Radovan Karkalic, Negovan Ivankovic, Pavel Otřísal. Defining Filtering Protective Suit Ideality using a Mathematical-Modeling Method. AATCC Journal of Research. 2019; 6 (6):18-24.
Chicago/Turabian StyleDusan Rajic; Radovan Karkalic; Negovan Ivankovic; Pavel Otřísal. 2019. "Defining Filtering Protective Suit Ideality using a Mathematical-Modeling Method." AATCC Journal of Research 6, no. 6: 18-24.
Using different methods of statistics, this paper aims to highlight the potential link between the antioxidant activity of flavonoids and the corresponding molecular descriptors. By calculating the descriptors (van der Waals surface (A), molar volume (V), partition coefficient (LogP), refractivity (R), polarizability (a), forming heat (Hformation), hydration energy (Ehidr), the dipole moment (mt)), together with antioxidant activities (RSA) calculated or taken from the literature, number of phenolic -OH groups and the presence (2) or absence (1) of C2=C3 double bond) for 29 flavonoid compounds and by intercorrelation between the studied parameters, the link between the number of phenolic groups grafted to the basic structure of flavonoids and their antioxidant activity was confirmed. Simultaneously, by using the chi-squared test and the intercorrelations matrix, a satisfactorily correlation coefficient (r2=0.5678; r=0.7536) between the structure of the flavonoids and their activity was obtained, fact that confirms the correlation of the antioxidant activity with the number of -OH phenolic groups.
Ioana Glevitzky; Gabriela Alina Dumitrel; Mirel Glevitzky; Bianca Pasca; Pavel Otřísal; Simona Bungau; Gabriela Cioca; Carmen Pantis; Maria Popa. Statistical Analysis of the Relationship Between Antioxidant Activity and the Structure of Flavonoid Compounds. Revista de Chimie 2019, 70, 3103 -3107.
AMA StyleIoana Glevitzky, Gabriela Alina Dumitrel, Mirel Glevitzky, Bianca Pasca, Pavel Otřísal, Simona Bungau, Gabriela Cioca, Carmen Pantis, Maria Popa. Statistical Analysis of the Relationship Between Antioxidant Activity and the Structure of Flavonoid Compounds. Revista de Chimie. 2019; 70 (9):3103-3107.
Chicago/Turabian StyleIoana Glevitzky; Gabriela Alina Dumitrel; Mirel Glevitzky; Bianca Pasca; Pavel Otřísal; Simona Bungau; Gabriela Cioca; Carmen Pantis; Maria Popa. 2019. "Statistical Analysis of the Relationship Between Antioxidant Activity and the Structure of Flavonoid Compounds." Revista de Chimie 70, no. 9: 3103-3107.
Barrier materials have wide applicability in both professional (military, medical, industrial) and non-professional (leisure and sports) fields. This paper focuses on the preparation of real conductive polymer (CP) sensors, for the study of the permeation of volatile toxic compounds through barrier materials. Use of such a CP sensor can help improve the quality of barrier materials used in protective clothing. Several types of platforms have been manufactured or purchased for use as comb sensors with different electrode dimensions, and a suitable method of applying the detection layer of conductive polymers (polyaniline and poly-pyrrole) has been developed. Prepared sensors were obtained using various technologies and were assessed not only for response to exposure to vapors of volatile toxic substances, but also for the possibility of their incorporation into a permeation cell, in order to expand the possibilities of using existing permeation devices. The resulting conductivity of the surface film ranges from 50 to 10,000 μS/cm. When exposed to ethanol vapors, the conductivity of the sensors dropped significantly and returned to the original value after exposure ended. The conductivity of the B12 CP sensor was in the range of 10–100 mS/cm and is considered the most valuable tested sensor. CPs deposited on this substrate have very high sensitivity in units of ppm (in special cases, even ppb) within the detection of analytes (in this case toxic vapors of ethanol, acetic acid) and the ability to return to initial (zero) conductivity.
Pavel Otrisal; Vladimir Obsel; Stanislav Florus; Constantin Bungau; Lotfi Aleya; Simona Bungau. Protecting emergency workers and armed forces from volatile toxic compounds: Applicability of reversible conductive polymer-based sensors in barrier materials. Science of The Total Environment 2019, 694, 133736 .
AMA StylePavel Otrisal, Vladimir Obsel, Stanislav Florus, Constantin Bungau, Lotfi Aleya, Simona Bungau. Protecting emergency workers and armed forces from volatile toxic compounds: Applicability of reversible conductive polymer-based sensors in barrier materials. Science of The Total Environment. 2019; 694 ():133736.
Chicago/Turabian StylePavel Otrisal; Vladimir Obsel; Stanislav Florus; Constantin Bungau; Lotfi Aleya; Simona Bungau. 2019. "Protecting emergency workers and armed forces from volatile toxic compounds: Applicability of reversible conductive polymer-based sensors in barrier materials." Science of The Total Environment 694, no. : 133736.
In our research, both theoretical and practical approaches to the assessment of permeability of barrier materials used to produce protective garments of an isolative type designed for body surface protection have been studied. The main goal of this paper is to study the thermal resistance for a barrier material of the ventilated anti-gas isolative garment OPCH-05 which is used in the conditions of the Czech Armed Forces for the Chemical Corps specialists� protection against the effects of toxic compounds. The thermal analysis of samples was performed using the differential scanning calorimetry, the surface structural changes were determined via the 3D optical profilometer and the gas permeation measurements were performed by means of the integral permeation method. Based on permeation results, the appropriate time limits and the temperatures of the exposure, during which the chemical protective garment could be securely used, were evaluated.
Pavel Otřísal; Karel Friess; Lucia Feherova; Zdenek Melicharik; Lubomir Svorc; Constantin Bungau; Danut-Eugeniu Mosteanu. The Heat Stress Effects on the Gases Permeability of the Isolative Type Garment of the Czech Armed Forces Chemical Corps Specialists Body Surface Protection. Revista de Chimie 2019, 70, 1597 -1602.
AMA StylePavel Otřísal, Karel Friess, Lucia Feherova, Zdenek Melicharik, Lubomir Svorc, Constantin Bungau, Danut-Eugeniu Mosteanu. The Heat Stress Effects on the Gases Permeability of the Isolative Type Garment of the Czech Armed Forces Chemical Corps Specialists Body Surface Protection. Revista de Chimie. 2019; 70 (5):1597-1602.
Chicago/Turabian StylePavel Otřísal; Karel Friess; Lucia Feherova; Zdenek Melicharik; Lubomir Svorc; Constantin Bungau; Danut-Eugeniu Mosteanu. 2019. "The Heat Stress Effects on the Gases Permeability of the Isolative Type Garment of the Czech Armed Forces Chemical Corps Specialists Body Surface Protection." Revista de Chimie 70, no. 5: 1597-1602.
In present paper, a miniaturized boron-doped diamond electrode (BDDE) was for the first time used as a reliable electrochemical sensor within the novel voltammetric protocol for the rapid and simple determination of dipyridamole (DIP). Cyclic voltammetric studies uncovered that the electrochemical oxidation of DIP was shown to be irreversible and diffusion-controlled process with single and well-developed signal at a potential of +0.45 V in Britton-Robinson buffer at pH 3.0. Using the suitable experimental conditions, the linearity for DIP determination was observed in the concentration ranges of 0.1−5.0 μM and 0.1−6.0 μM with the corresponding limits of detection of 40 nM and 60 nM as well as the intra-day repeatability with relative standard deviation below 5% for differential pulse and square-wave voltammetry, respectively. This protocol was successfully applied to the determination of DIP in pharmaceutical tablets with result in good compliance with that declared by the producer. Biological pertinence of the developed procedure was presented by analysis of model human urine samples with adequate recoveries. The proposed protocol with a miniaturized BDDE could represent an effective and alternative analytical implement for DIP determination instead of commonly used toxic mercury and chemically-modified electrodes in previously published methods.
Olha Sarakhman; Solomiya Pysarevska; Liliya Dubenska; Dalibor M. Stanković; Pavel Otřísal; Alexandra Planková; Kristína Kianičková; Ľubomír Švorc. Voltammetric Protocol for Reliable Determination of a Platelet Aggregation Inhibitor Dipyridamole on a Bare Miniaturized Boron-Doped Diamond Electrochemical Sensor. Journal of The Electrochemical Society 2019, 166, B219 -B226.
AMA StyleOlha Sarakhman, Solomiya Pysarevska, Liliya Dubenska, Dalibor M. Stanković, Pavel Otřísal, Alexandra Planková, Kristína Kianičková, Ľubomír Švorc. Voltammetric Protocol for Reliable Determination of a Platelet Aggregation Inhibitor Dipyridamole on a Bare Miniaturized Boron-Doped Diamond Electrochemical Sensor. Journal of The Electrochemical Society. 2019; 166 (4):B219-B226.
Chicago/Turabian StyleOlha Sarakhman; Solomiya Pysarevska; Liliya Dubenska; Dalibor M. Stanković; Pavel Otřísal; Alexandra Planková; Kristína Kianičková; Ľubomír Švorc. 2019. "Voltammetric Protocol for Reliable Determination of a Platelet Aggregation Inhibitor Dipyridamole on a Bare Miniaturized Boron-Doped Diamond Electrochemical Sensor." Journal of The Electrochemical Society 166, no. 4: B219-B226.
The Czech Armed Forces' soldiers of all specializations and mainly the chemical corps'specialist are prepared for task fulfillment in military and non-military operations within those a real threat of weapons of mass destruction employment and, occasionally, the real danger of toxic industrial materials leakage is present. They can solve problems caused by acids leakage in contaminated areas mainly during task fulfillment in non-military operations on the Czech Republic territory in cooperation with Fire Rescue Brigades' chemical specialists. Individual protective equipment which is established in the Czech Armed Forces were neither design for this purpose and, moreover, nor tested and thus there is no real data concerning their chemical resistivity. In recent time, some methods have been introduced into the Czech Armed Forces environment. They are useful for determination of chemical resistivity of barrier materials against toxic compounds detectable with acid-basic (colorimetric) methods and conductometric ones. The paper deals with the possibility of using the presented methods and compares the suitability of their application in relation to the protective garments designated for the Czech Armed Forces members' body surface.
Pavel Otřísal; Zdenek Melicharik; Lubomir Svorc; Simona Bungau; Ioan Virca; Ghita Barsan; Danut Mosteanu. Testing Methods of Assessment for the Chemical Resistance of Insulating Materials Against the Effect of Selected Acids. Materiale Plastice 2018, 55, 545 -551.
AMA StylePavel Otřísal, Zdenek Melicharik, Lubomir Svorc, Simona Bungau, Ioan Virca, Ghita Barsan, Danut Mosteanu. Testing Methods of Assessment for the Chemical Resistance of Insulating Materials Against the Effect of Selected Acids. Materiale Plastice. 2018; 55 (4):545-551.
Chicago/Turabian StylePavel Otřísal; Zdenek Melicharik; Lubomir Svorc; Simona Bungau; Ioan Virca; Ghita Barsan; Danut Mosteanu. 2018. "Testing Methods of Assessment for the Chemical Resistance of Insulating Materials Against the Effect of Selected Acids." Materiale Plastice 55, no. 4: 545-551.
The influences of hypochlorite DM with oil ingredient and without it, which is introduced into the armament not only by the Czech Armed Forces Chemical Corps, but also by the chemical services specialists of the Czech Republic Fire Rescue Service, on a substrate consisting of a barrier material based on isobutylene-isoprene rubber (butyl rubber) were presented in this paper. Based on the repeated exposure of the substrate formed by the barrier layer material selected by this decontamination mixture and its subsequent rinsing, a change of the breakthrough time has been studied using the MIKROTEST method employing the chemical warfare agent of sulfur mustard and Congo red as a detecting agent.
Pavel Otřísal; Zdeněk Melichařík; Lubomir Svorc; Romana Oancea; Vlad Barsan. The Most Significant Influences of Decontamination Mixtures Containing Chlorinating and Oxidizing Agents on Barrier Materials Formed by Isobutylene-Isoprene Rubber. Materiale Plastice 2018, 55, 325 -331.
AMA StylePavel Otřísal, Zdeněk Melichařík, Lubomir Svorc, Romana Oancea, Vlad Barsan. The Most Significant Influences of Decontamination Mixtures Containing Chlorinating and Oxidizing Agents on Barrier Materials Formed by Isobutylene-Isoprene Rubber. Materiale Plastice. 2018; 55 (3):325-331.
Chicago/Turabian StylePavel Otřísal; Zdeněk Melichařík; Lubomir Svorc; Romana Oancea; Vlad Barsan. 2018. "The Most Significant Influences of Decontamination Mixtures Containing Chlorinating and Oxidizing Agents on Barrier Materials Formed by Isobutylene-Isoprene Rubber." Materiale Plastice 55, no. 3: 325-331.
The SiOx barrier nanocoatings have been prepared on selected polymer matrices to increase their resistance against permeation of toxic substances. The aim has been to find out whether the method of vacuum plasma deposition of SiOx barrier nanocoatings on a polyethylene terephthalate (PET) foil used by Aluminium Company of Canada (ALCAN) company (ALCAN Packaging Kreuzlingen AG (SA/Ltd., Kreuzlingen, Switzerland) within the production of CERAMIS® packaging materials with barrier properties can also be used to increase the resistance of foils from other polymers against the permeation of organic solvents and other toxic liquids. The scanning electron microscopy (SEM) microstructure of SiOx nanocoatings prepared by thermal deposition from SiO in vacuum by the Plasma Assisted Physical Vapour Deposition (PA-PVD) method or vacuum deposition of hexamethyldisiloxane (HMDSO) by the Plasma-enhanced chemical vapour deposition (PECVD) method have been studied. The microstructure and behavior of samples when exposed to a liquid test substance in relation to the barrier properties is described.
Radek Prikryl; Pavel Otrisal; Vladimir Obsel; Lubomír Svorc; Radovan Karkalic; Jan Buk. Protective Properties of a Microstructure Composed of Barrier Nanostructured Organics and SiOx Layers Deposited on a Polymer Matrix. Nanomaterials 2018, 8, 679 .
AMA StyleRadek Prikryl, Pavel Otrisal, Vladimir Obsel, Lubomír Svorc, Radovan Karkalic, Jan Buk. Protective Properties of a Microstructure Composed of Barrier Nanostructured Organics and SiOx Layers Deposited on a Polymer Matrix. Nanomaterials. 2018; 8 (9):679.
Chicago/Turabian StyleRadek Prikryl; Pavel Otrisal; Vladimir Obsel; Lubomír Svorc; Radovan Karkalic; Jan Buk. 2018. "Protective Properties of a Microstructure Composed of Barrier Nanostructured Organics and SiOx Layers Deposited on a Polymer Matrix." Nanomaterials 8, no. 9: 679.
Activities specific to the military field, regarding the instruction process or the missions in the operating theatres, require military personnel to be exposed to a series of toxic chemical compounds, with effects ranging from short to long term. European legislation regarding environmental protection and employee health has become stricter and it directly influences the choice of materials that will be turned into ammunition. Most energetic materials from ammunition contain compounds whose synthesis and decomposition involves the release of high toxicity products into the environment. Shootings with classical weapons systems have an effect on the environment, in the shooting area and also in the place of impact with the objective, having both direct (the shock wave that results from the ammunition exploding, shrapnel, sound waves, high temperatures) and indirect (unexploded ammunition, contamination of the environment) effects. This paper presents the results of experimental research conducted in military shooting ranges during the testing of diverse smoke ammunition, in order to detect and identify the released chemical compounds, thus studying their impact on the fighters� health and security and evaluating the risks they pose on the environment.
Nicoleta Petrea Raluca Ginghina; Andrada Pretorian; Razvan Petre; Ghita Barsan; Pavel Otřísal; Danut Eugeniu Mosteanu. Experimental Survey Regarding the Dangerous Chemical Compounds from Military Polygons that Affect the Military Health and the Environment. Revista de Chimie 2018, 69, 1640 -1644.
AMA StyleNicoleta Petrea Raluca Ginghina, Andrada Pretorian, Razvan Petre, Ghita Barsan, Pavel Otřísal, Danut Eugeniu Mosteanu. Experimental Survey Regarding the Dangerous Chemical Compounds from Military Polygons that Affect the Military Health and the Environment. Revista de Chimie. 2018; 69 (7):1640-1644.
Chicago/Turabian StyleNicoleta Petrea Raluca Ginghina; Andrada Pretorian; Razvan Petre; Ghita Barsan; Pavel Otřísal; Danut Eugeniu Mosteanu. 2018. "Experimental Survey Regarding the Dangerous Chemical Compounds from Military Polygons that Affect the Military Health and the Environment." Revista de Chimie 69, no. 7: 1640-1644.
Herein, an advanced electroanalytical approach for the determination of ibuprofen based on the use of a bare and electrochemically untreated boron-doped diamond electrode is presented. Cyclic voltammetric study revealed that the electrode reaction of the analyte was manifested by the presence of well-shaped irreversible and diffusion-driven oxidation peak at very high potential (+1.75 V vs. Ag/AgCl/3 mol L−1 KCl reference electrode) in 1 mol L−1 perchloric acid. After optimization of experimental conditions, the peak current of ibuprofen was proportionally linear from 9.49 × 10−7 to 6.69 × 10−5 mol L−1 providing both differential pulse (DPV) and square-wave voltammetric (SWV) techniques, respectively. The elaborated electroanalytical protocol rendered low detection limits of 4.1 × 10−7 and 9.3 × 10−7 mol L−1 in association with favourable intra-day repeatability (relative standard deviation of 3.6 and 4.6%) using DPV and SWV procedures, respectively. The effect of interfering compounds such as ascorbic acid, dopamine, caffeine, uric acid and glucose on the current response of ibuprofen was explored in details. The usefulness of the proposed approach was verified in the analysis of a variety of commercial brands of pharmaceuticals and spiked human urine samples with the significant range of recovery percentages (for pharmaceuticals: 99.8–107.5% and 99.8–105.0% by DPV and SWV, for urine: 95–107% and 97–103% by DPV and SWV). Taking these features into account, the developed protocol may be exploited as a novel, simple and efficient tool in drug quality control analysis and analysis of biological samples. In addition, a bare and electrochemically untreated boron-doped diamond electrode may be applied as a progressive electrochemical sensor and helpful alternative to previously utilized electrochemical platforms in this field.
Ľubomír Švorc; Ivana Strežová; Kristína Kianičková; Dalibor M. Stanković; Pavel Otřísal; Anchalee Samphao. An advanced approach for electrochemical sensing of ibuprofen in pharmaceuticals and human urine samples using a bare boron-doped diamond electrode. Journal of Electroanalytical Chemistry 2018, 822, 144 -152.
AMA StyleĽubomír Švorc, Ivana Strežová, Kristína Kianičková, Dalibor M. Stanković, Pavel Otřísal, Anchalee Samphao. An advanced approach for electrochemical sensing of ibuprofen in pharmaceuticals and human urine samples using a bare boron-doped diamond electrode. Journal of Electroanalytical Chemistry. 2018; 822 ():144-152.
Chicago/Turabian StyleĽubomír Švorc; Ivana Strežová; Kristína Kianičková; Dalibor M. Stanković; Pavel Otřísal; Anchalee Samphao. 2018. "An advanced approach for electrochemical sensing of ibuprofen in pharmaceuticals and human urine samples using a bare boron-doped diamond electrode." Journal of Electroanalytical Chemistry 822, no. : 144-152.
The article deals with the preparation and possibilities of using combined filtration sorption systems usable for the construction of folded filters or respirators. The studied materials are made of several structural layers—a filter membrane made of polymeric nanofibers, an adsorbent containing active carbon or porous silicon dioxide nanofibers, and a supporting or cover nonwoven bicomponent fabric. The layers are connected only by pressure at an elevated temperature without the use of binders, according to utility model PUV 31 375. The result is a compact fabric material of textile character with a high permeability, good mechanical resistance, which effectively catches the submicron particles and the gases of the organic substances. The prepared samples of the filter sorptive material have been evaluated not only from the point of view of morphology and microstructure, but also from the point of view of the capture of pollutants.
Pavel Otrisal; Vladimir Obsel; Jan Buk; Lubomír Svorc. Preparation of Filtration Sorptive Materials from Nanofibers, Bicofibers, and Textile Adsorbents without Binders Employment. Nanomaterials 2018, 8, 564 .
AMA StylePavel Otrisal, Vladimir Obsel, Jan Buk, Lubomír Svorc. Preparation of Filtration Sorptive Materials from Nanofibers, Bicofibers, and Textile Adsorbents without Binders Employment. Nanomaterials. 2018; 8 (8):564.
Chicago/Turabian StylePavel Otrisal; Vladimir Obsel; Jan Buk; Lubomír Svorc. 2018. "Preparation of Filtration Sorptive Materials from Nanofibers, Bicofibers, and Textile Adsorbents without Binders Employment." Nanomaterials 8, no. 8: 564.
In the present paper, a miniaturized boron-doped diamond electrode (BDDE) is proposed as a progressive electrochemical sensor for simple, fast and reliable quantification of dimethylxanthine alkaloid, theobromine (TB). Using cyclic voltammetry, the studied xanthine provided one well-shaped, irreversible and diffusion-controlled oxidation peak at relatively high potentials (+1.2 V vs. Ag/AgCl/3 M KCl reference electrode) in the presence of 0.1 M H2SO4. After selection of suitable experimental conditions, the linear calibration curves for TB were obtained in the concentration range from 0.99 up to 54.5 μM with the sensitivity of 0.07 μA/μM providing both differential pulse (DPV) and square-wave voltammetric (SWV) techniques, respectively. The elaborated voltammetric protocol yielded low detection limits of 0.42 and 0.51 μM accompanied by adequate intra-day repeatability (relative standard deviation of 2.5 and 1.7%) using DPV and SWV procedure, respectively. The interference study revealed the reasonable selectivity when taking the target food samples into account. The practical applicability of the voltammetric protocol using a miniaturized BDDE was verified in the analysis of six commercially available brands of chocolate products with the determined mass percentages of TB ranging from 0.75 to 2.24% and from 0.69 to 2.15% using DPV and SWV procedure, respectively. The obtained results were also in a good agreement with those achieved by reference titration method with potentiometric indication. The progressive electrochemical sensor based on a miniaturized BDDE has appeared to be an attractive candidate for practical applications in food quality control. Besides, the proposed voltammetric protocol presents advantages when compared to others techniques (e.g. chromatography), concerning simplicity, cost, speed of analysis, waste generation (environmentally friendly) and samples pretreatment (only dilution in electrolyte solution prior to analysis).
Ľubomír Švorc; Marek Haššo; Olha Sarakhman; Kristína Kianičková; Dalibor M. Stanković; Pavel Otřísal. A progressive electrochemical sensor for food quality control: Reliable determination of theobromine in chocolate products using a miniaturized boron-doped diamond electrode. Microchemical Journal 2018, 142, 297 -304.
AMA StyleĽubomír Švorc, Marek Haššo, Olha Sarakhman, Kristína Kianičková, Dalibor M. Stanković, Pavel Otřísal. A progressive electrochemical sensor for food quality control: Reliable determination of theobromine in chocolate products using a miniaturized boron-doped diamond electrode. Microchemical Journal. 2018; 142 ():297-304.
Chicago/Turabian StyleĽubomír Švorc; Marek Haššo; Olha Sarakhman; Kristína Kianičková; Dalibor M. Stanković; Pavel Otřísal. 2018. "A progressive electrochemical sensor for food quality control: Reliable determination of theobromine in chocolate products using a miniaturized boron-doped diamond electrode." Microchemical Journal 142, no. : 297-304.