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Wyświetlanie 1-15 z 212
Tytuł:
Hydrogen peroxide as a biodegradation stimulator in remediation processes of soils heavily contaminated with petrochemicals
Autorzy:
Rosik-Dulewska, C.
Krzyśko-Łupicka, T.
Ciesielczuk, T.
Kręcidło, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/778974.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
soil
remediation
petrochemicals
hydrogen peroxide
Opis:
The soil contaminated with petroleum products must be excluded from the crops and treated to reclamation processes. Natural processes of decomposition of hydrocarbon compounds go very slow, so it is necessary to use bioaugumentation or stimulation in order to accelerate the return of the soil to high culture. In this study the effect of hydrogen peroxide on the process of cleaning soil strongly contaminated with pertochemicals was investigated. For this purpose, a pot experiment lasting 60 days was carried. The dynamics of changes in the population of filamentous fungi, yeasts and bacteria were examined and also content of aliphatic hydrocarbons (n-alkanes), monoaromatic and polycyclic aromatic hydrocarbons (PAHs). Experimental use of hydrogen peroxide in the process of biodegradation of petroleum compounds assisted in the analyzed soil led to an increase of the number of grampositive bacteria during the test. Stimulation of oil products biodegradation by hydrogen peroxide also increased by 35% decomposition efficiency of aliphatic hydrocarbons (C8-C40) and about 50% PAH’s in comparison to control samples without hydrogen peroxide. There was no influence of hydrogen peroxide on the content of monoaromatic hydrocarbons (BTEX) with respect to controls, although in the end of experiment, the total concentration decreased by about 50% compared to the initial content.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 2; 17-22
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The oxidation of limonene at raised pressure and over the various titanium-silicate catalysts
Autorzy:
Wróblewska, A.
Makuch, E.
Miądlicki, P.
Powiązania:
https://bibliotekanauki.pl/articles/779024.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
limonene oxidation
hydrogen peroxide
TBHP
Opis:
This work presents the studies on the oxidation of limonene with hydrogen peroxide and tert-butyl hydroperoxide (TBHP) in the presence of : TS-2, Ti-Beta, Ti-MCM-41 and Ti-MWW catalysts, at the autogenic pressure and atmospheric pressure. The examination were performed at the following conditions: the temperature of 140°C (studies in the autoclave) and 80°C (studies in glass reactor), the molar ratio of limonene/oxidant (H2O2 or WNTB) = 1:1, the methanol concentration 80 wt%, the catalyst content 3 wt%, the reaction time 3 h and the intensity of stirring 500 rpm. The analysis of the results showed that in process not only 1,2-epoxylimonene was formed but also: 1,2-epoxylimonene diol, carveol, carvone and perillyl alcohol but for 1,2-epoxylimonene obtaining the better method was the method at the autogenic pressure and in the presence of TBHP.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 4; 82-87
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Combined treatment of toxic cyanobacteria Microcystis aeruginosa with hydrogen peroxide and microcystin biodegradation agents results in quick toxin elimination
Autorzy:
Dziga, Dariusz
Maksylewicz, Anna
Maroszek, Magdalena
Marek, Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/1038535.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
cyanobacteria
microcystins
hydrogen peroxide
microcystinase
Sphingomonas
Opis:
Under some conditions the growth of toxic cyanobacteria must be controlled by treatment with algicidal compounds. Hydrogen peroxide has been proposed as an efficient and relatively safe chemical which can remove cyanobacteria from the environment selectively, without affecting other microorganisms. However, the uncontrolled release of secondary metabolites, including toxins may occur after such a treatment. Our proposal presented in this paper concerns fast biodegradation of microcystin released after cell lysis induced by hydrogen peroxide. The effectiveness of both, Sphingomonas sp. and heterologously expressed MlrA enzyme, in the removal of the toxin from Microcystis aeruginosa culture was investigated. The results indicate that neither Sphingomonas cells nor MlrA are affected by hydrogen peroxide at the concentrations which stop the growth of cyanobacteria. A several-fold reduction in microcystin levels was documented in the presence of these agents with biodegradation ability. Our results provide evidence that such a combined treatment of water reservoirs dominated by microcystin-producing cyanobacteria may be a promising alternative which allows fast elimination of both, the bloom forming species and toxins, from the environment.
Źródło:
Acta Biochimica Polonica; 2018, 65, 1; 133-140
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Labile iron pool correlates with iron content in the nucleus and the formation of oxidative DNA damage in mouse lymphoma L5178Y cell lines.
Autorzy:
Kruszewski, Marcin
Iwaneńko, Teresa
Powiązania:
https://bibliotekanauki.pl/articles/1043668.pdf
Data publikacji:
2003
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
iron homeostasis
hydrogen peroxide
comet assay
Opis:
Labile iron pool (LIP) constitutes a crossroad of metabolic pathways of iron-containing compounds and is midway between the cellular need for iron, its uptake and storage. In this study we investigated oxidative DNA damage in relation to the labile iron pool in a pair of mouse lymphoma L5178Y (LY) sublines (LY-R and LY-S) differing in sensitivity to hydrogen peroxide. The LY-R cells, which are hydrogen peroxide-sensitive, contain 3 times more labile iron than the hydrogen peroxide-resistant LY-S cells. Using the comet assay, we compared total DNA breakage in the studied cell lines treated with hydrogen peroxide (25 μM for 30 min at 4°C). More DNA damage was found in LY-R cells than in LY-S cells. We also compared the levels of DNA lesions sensitive to specific DNA repair enzymes in both cell lines treated with H2O2. The levels of endonuclease III-sensitive sites and Fapy-DNA glycosylase-sensitive sites were found to be higher in LY-R cells than in LY-S cells. Our data suggest that the sensitivity of LY-R cells to H2O2 is partially caused by the higher yield of oxidative DNA damage, as compared to that in LY-S cells. The critical factor appears to be the availability of transition metal ions that take part in the OH radical-generating Fenton reaction (very likely in the form of LIP).
Źródło:
Acta Biochimica Polonica; 2003, 50, 1; 211-215
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Residential price of natural gas in Argentina
Autorzy:
Freidenberger, C. G.,
Śliwa, T.
Powiązania:
https://bibliotekanauki.pl/articles/1203994.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
biocide
microorganisms
triazine
peroxide
biocidal activity
Opis:
This article was made to research about natural gas market in Argentina and its price for residential customers. Wellhead, transmission and distribution prices are developed in this paper. In addition taxes and special charges are shown. Commercial consumption is not included in residential consumption. Argentina has changed its natural gas framework in 1992, after this year several regulations transformed the gas market. On the other hand the country lost its self-supply and imports are growing in the last years. In this context natural gas price for residential customers is smali in comparison with international context.
Źródło:
AGH Drilling, Oil, Gas; 2015, 32, 2; 255-274
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Leaching of chalcopyrite concentrate in hydrogen peroxide solution
Autorzy:
Agacayak, T.
Aras, A.
Aydogan, S.
Erdemoglu, M.
Powiązania:
https://bibliotekanauki.pl/articles/110645.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
chalcopyrite
dissolution
hydrogen peroxide
leaching
extraction
Opis:
The leaching conditions of chalcopyrite (CuFeS2) concentrate in a hydrogen peroxide medium were investigated by studying the effects of its leaching parameters, such as stirring speed, temperature, hydrogen peroxide concentration and the particle size of the concentrate on Cu extraction. It was found that stirring speed has no effect on the leaching. Copper extraction from chalcopyrite is directly proportional to hydrogen peroxide concentration, but the extraction decreases at temperatures above 60°C. The maximum copper extraction was obtained with the following conditions without stirring: 240 min of leaching time, 3.0 M hydrogen peroxide concentration, 40°C leaching temperature and 53-75 m particle size fraction.
Źródło:
Physicochemical Problems of Mineral Processing; 2014, 50, 2; 657-666
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physicochemiacal changes of post-frying sunflower oil
Autorzy:
Maniak, B
Szmigielski, M.
Piekarski, W.
Markowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/26259.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
physicochemical change
post-frying oil
sunflower oil
fatty acid composition
acid value zob.acid number
acid number
peroxide value zob.peroxide number
peroxide number
fuel biocomponent
Źródło:
International Agrophysics; 2009, 23, 3; 243-248
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Forensic Investigation of Some Peroxides Explosives
Autorzy:
Kuzmin, V. V.
Solov'ev, M. Y.
Tuzkov, Y. B.
Kozak, G. D.
Powiązania:
https://bibliotekanauki.pl/articles/358555.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
peroxide
methods of analysis
traces
volatilize
detonation
Opis:
Some of pe roxide s : t r i a c e tone t r ipe roxide (TATP) , hexamethylenetriperoxidediamine (HMTD) have been used recently as "irregular" explosives for delinquency and international terrorism purposes. The intimate knowledge of properties and methods of analysis of these substances is necessary for experts. Forensic investigations of some peroxides explosives: triacetonetriperoxide (TATP) and hexamethylenetriperoxidediamine (HMTD) were carried out in this work. The detonation process of peroxides initiation by means of pyroxylin layer ignition was investigated, velocity of detonation at apparent density (ρ HMTD = 0.38 g/cm3, ρ TATP = 0.47 g/cm3) was measured by means of a Russian fotoregister GFR-3. These data were compared with literature detonation velocity values that had been measured at larger densities. The values of detonation velocities complement each other rather well, linear dependencies of D vs. ρ found at densities ρ = 0.35-1.2 g/cm3. The high sensitivity of the investigated analytical methods, that were applied (10-5 -10<-8 g) facilitate the determination of possible times for finding traces of TATP after an explosion. Time t = 6 hours after explosion is the critical time for finding peroxides traces of TATP on a metal surface by means of analytical methods used in this work.
Źródło:
Central European Journal of Energetic Materials; 2008, 5, 3-4; 77-85
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technological parameters of epoxidation of sesame oil with performic acid
Autorzy:
Musik, M.
Milchert, E.
Malarczyk-Matusiak, K.
Powiązania:
https://bibliotekanauki.pl/articles/778421.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
sesame oil
epoxidation
performic acid
hydrogen peroxide
Opis:
The course of epoxidation of sesame oil (SO) with performic acid formed „in situ” by the reaction of 30 wt% hydrogen peroxide and formic acid in the presence of sulfuric acid(VI) as a catalyst was studied. The most advantageous of the technological independent parameters of epoxidation are as follows: temperature 80°C, H2O2  C=C 3.5:1, HCOOH/C=C 0.8:1, amount of catalyst as H2SO4 /(H2O2 +HCOOH) 1 wt%, stirring speed at least 700 rpm, reaction time 6 h. The iodine number (IN), epoxy number (EN), a relative conversion to oxirane (RCO) and oxirane oxygen content (EOe) were determined every hour during the reaction. Under optimal conditions the sesame oil conversion amounted to 90.7%, the selectivity of transformation to epoxidized sesame oil was equal to 93.2%, EN = 0.34 mol/100 g, IN = 0.04 mol/100 g oil (10.2 g/100 g oil), a relative conversion to oxirane RCO = 84.6%, and oxirane oxygen content of EOe = 5.5%.
Źródło:
Polish Journal of Chemical Technology; 2018, 20, 3; 53-59
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Basic energetic parameters of Acanthamoeba castellanii mitochondria and their resistance to oxidative stress
Autorzy:
Jarmuszkiewicz, Wieslawa
Antos-Krzeminska, Nina
Drachal-Chrul, Danuta
Matkovic, Karolina
Nobik, Wioletta
Pieńkowska, Joanna
Swida, Aleksandra
Woyda-Ploszczyca, Andrzej
Budzinska, Malgorzata
Powiązania:
https://bibliotekanauki.pl/articles/1040753.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Acanthamoeba castellanii
mitochondria
hydrogen peroxide
oxidative stress
Opis:
The purpose of this study was establishing the basic energetic parameters of amoeba Acanthamoeba castellanii mitochondria respiring with malate and their response to oxidative stress caused by hydrogen peroxide in the presence of Fe2+ ions. It appeared that, contrary to a previous report (Trocha LK, Stobienia O (2007) Acta Biochim Polon 54: 797), H2O2-treated mitochondria of A. castellanii did not display any substantial impairment. No marked changes in cytochrome pathway activity were found, as in the presence of an inhibitor of alternative oxidase no effects were observed on the rates of uncoupled and phosphorylating respiration and on coupling parameters. Only in the absence of the alternative oxidase inhibitor, non-phosphorylating respiration progressively decreased with increasing concentration of H2O2, while the coupling parameters (respiratory control ratio and ADP/O ratio) slightly improved, which may indicate some inactivation of the alternative oxidase. Moreover, our results show no change in membrane potential, Ca2+ uptake and accumulation ability, mitochondrial outer membrane integrity and cytochrome c release for 0.5-25 mM H2O2-treated versus control (H2O2-untreated) mitochondria. These results indicate that short (5 min) incubation of A. castellanii mitochondria with H2O2 in the presence of Fe2+ does not damage their basic energetics.
Źródło:
Acta Biochimica Polonica; 2008, 55, 2; 349-356
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena oddziaływań PE-LD/mączka drzewna w kompozytach WPC modyfikowanych nadtlenkiem
Evaluation of PE-LD/wood flour interaction in WPC modified with peroxide
Autorzy:
Lewandowski, K.
Piszczek, K.
Skórczewska, K.
Powiązania:
https://bibliotekanauki.pl/articles/279044.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników
Tematy:
WPC
modyfikacja
nadtlenek dikumylu
modification
dicumyl peroxide
Opis:
W pracy dokonano oceny wpływu nadtlenku dikumylu na zmianę adhezji międzyfazowej polimer-drewno w kompozytach polimerowo-drzewnych (WPC). Przebadano kompozyty polietylenu małej gęstości (PE-LD) z mączką drzewną Lignocel 9 (WF). Zawartość napełniacza drzewnego w kompozycie wynosiła 20% lub 40% wagowych. Adhezję PE-LD/mączka drzewna oceniono pośrednio na podstawie badań sorpcyjnych. Określono nasiąkliwość oraz zmianę wytrzymałości na rozciąganie kompozytów po długotrwałym zanurzeniu w wodzie destylowanej. Stwierdzono, że modyfikacja kompozytów nadtlenikiem dikumylu wpływa na zwiększenie adhezji międzyfazowej polimer-drewno o czym świadczy wyraźne zmniejszenie nasiąkliwości oraz mniejszy wpływ sorpcji na wartość wytrzymałości na rozciągnie badanych kompozytów.
In this work has been investigated the effect of dicumyl peroxide on the change of interfacial polymer-wood adhesion in the polymer-wood composites (WPC). The composites of low density polyethylene (PE-LD) with Lignocel 9 wood flour (WF) have been tested. The content of wood filler in the composite was 20% or 40% byt weight. Adhesion of PE-LD-wood flour was indirectly evaluated by sorption studies. Water absorbsorption and change in tensile strength of composites have been determined after long-term immersion in distilled water. It has been found that the modified composites have much lower water absorption, and lower sorption effect on the tensile strength of the tested composites. This proves that dicumyl peroxide increases interfacial polymer-wood adhesion.
Źródło:
Przetwórstwo Tworzyw; 2017, T. 23, Nr 6 (180), 6 (180); 550-556
1429-0472
Pojawia się w:
Przetwórstwo Tworzyw
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Phosphates and Fluorides, Included in TiO2 Nanotube Layers on the Performance of Hydrogen Peroxide Detection
Autorzy:
Arkusz, K.
Krasicka-Cydzik, E.
Powiązania:
https://bibliotekanauki.pl/articles/354114.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
titania nanotubes
thermal modification
biosensor
hydrogen peroxide
Opis:
Titania nanotube (TNT) arrays fabricated by anodizing of titanium foil in organic (ethylene glycol) and inorganic (phosphoric acid) electrolytes and thermally modified in argon revealed much improved properties to detect hydrogen peroxide. Horseradish peroxidase and acetate thionine co-absorbed by a dip coating on the TNT electrode were used to detect hydrogen peroxide in phosphate buffered saline. The morphology and electrochemical properties of TNT arrays were studied by scanning electron microscopy, electrochemical impedance spectroscopy and cyclic voltammetry. Well defined oxidation and reduction peaks for potassium ferricyanide have been observed for TNT formed in ethylene glycol and annealed in argon. TNT arrays formed in organic electrolyte and annealed in argon indicated more favorable adsorption and electrochemical properties what was confirmed by detection of hydrogen peroxide towards analyte in phosphorate buffered saline solution.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 765-772
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dezynfekcja powierzchni „wrażliwych”
Disinfection of „Sensitive” Surfaces
Autorzy:
Harmata, W.
Markowska, A.
Pirszel, J.
Powiązania:
https://bibliotekanauki.pl/articles/373286.pdf
Data publikacji:
2017
Wydawca:
Centrum Naukowo-Badawcze Ochrony Przeciwpożarowej im. Józefa Tuliszkowskiego
Tematy:
dezynfekcja
gazowy nadtlenek wodoru
disinfection
gaseous hydrogen peroxide
Opis:
Cel: Celem artykułu jest prezentacja metody dezynfekcji powierzchni materiałów papierniczych niepodatnych na procesy likwidacji skażeń (tzw. powierzchni „wrażliwych”) za pomocą gazowego nadtlenku wodoru. Wprowadzenie: Likwidacja skażeń jest bardzo trudnym procesem pod względem technicznym i technologicznym, gdyż powierzchnie po odkażeniu powinny być bezpieczne dla ludzi i środowiska. Dotyczy to głównie wnętrz, aparatury, dokumentacji oraz specjalistycznego wyposażenia. Obecnie możliwość skażenia zespołów ratowniczych lub kontyngentów wojskowych jest wielce prawdopodobna. Współcześnie stosowane technologie likwidacji skażeń oparte są o tzw. metody mokre, które są nieprzydatne do likwidacji skażeń dokumentacji (materiałów papierniczych), specjalistycznego wyposażenia i elektroniki. Niezależnie od pomocy poszkodowanym należy dokonać skutecznej likwidacji skażeń materiałów, urządzeń, sprzętu i odzieży. Proces musi być skuteczny, aby zapobiegać skażeniom wtórnym, z drugiej zaś strony powinien przywrócić skażonym materiałom i przedmiotom cechy użytkowe. Jedną z możliwości praktycznego rozwiązania tego problemu jest zastosowanie gazowego (waporyzowanego) nadtlenku wodoru oraz konstrukcja przewoźnego urządzenia do likwidacji skażeń. Metodologia: Metodykę określenia działania biobójczego gazowego nadtlenku wodoru opracowano na podstawie norm: PN-EN 13697, PN-EN 14561, PN-EN 14562. Jako substancje testowe wykorzystano grzyby drożdżopodobne (Candida albicans) i pleśniowe (Aspergillus niger). Wpływ procesu likwidacji skażeń na materiały papiernicze oceniano na podstawie kontroli wizualnej materiałów, jakości znajdującego się na nich pisma lub druku. Porównywano skany dokumentów. Wnioski: Rozwój biotechnologii inspiruje procesy, które mogą zastąpić technologie tradycyjne, mniej wydajne, a zarazem bardziej szkodliwe dla środowiska naturalnego. Wraz ze wzrostem liczby tzw. „użytkowników” biotechnologii, inżynierii genetycznej, mikrobiologii, biologii molekularnej itp. wzrasta także prawdopodobieństwo wystąpienia niekontrolowanego uwolnienia do środowiska materiału biologicznego bądź wykorzystania go w akcie terrorystycznym lub kryminalnym. Istnieje zatem pilna potrzeba skutecznego i szybkiego sposobu likwidacji skażeń biologicznych. Wykorzystanie nadtlenku wodoru w postaci pary, zdaniem autorów, jest perspektywiczną metodą likwidacji skażeń powierzchni niepodatnych na te procesy metodami tradycyjnymi. W badaniach uzyskano kompatybilność materiałową dla materiałów papierniczych, powłok lakierniczych, tworzyw sztucznych, elementów elektronicznych, optycznych oraz optoelektronicznych.
Objective: The objective of this paper is to present the methods of disinfection of so-called “sensitive” surfaces, non-susceptible to decontamination processes, using gaseous hydrogen peroxide. Introduction: Technically and technologically, decontamination is a very difficult process, as decontaminated surfaces should be safe for use by people and environment after the process is completed. This concerns mainly rooms, devices, documentation and specialised equipment. Nowadays, rescue teams or military groups face a very high risk of contamination. The system of crisis response in our country has the means and technologies for decontamination using so-called wet methods (the active substance exists in the form of an aqueous solution or an organic mixture) which, however, are unfit for the decontamination of documents (paper materials), specialist equipment and electronics. Irrespective of the aid provided to those injured, the effective decontamination of materials, devices and clothing should also be carried out. This process has to be effective so that secondary contamination is prevented, and should also be able to restore the affected equipment and materials to their original state. One of the practical methods for dealing with this problem involves the application of gaseous (vaporised) hydrogen peroxide and the construction of a mobile decontamination device. Methodology: The methodology for the determination of the biocidal effect of gaseous hydrogen peroxide is based on the following standards: PN-EN 13697, PN-EN 14561, PN-EN 14562. Yeast-like fungi (Candida albicans) and mould (Aspergillus niger) were used as test substances. The impact of the decontamination process on stationery was assessed through the visual inspection of the materials and the quality of their handwriting quality or print. Document scans were compared. Conclusions: Advancements in biotechnology stimulate processes which may replace the technologies currently used as less effective and more harmful to the natural environment. Along with the increase in the number of “users” of biotechnology, genetic engineering, microbiology, molecular biology, etc., there is a greater probability that an uncontrolled release to the environment occurs or biomaterials are used for terrorist or criminal purposes. An urgent need is therefore apparent for the effective and fast eradication of bio-contaminations. The use of vaporous hydrogen peroxide appears to be a viable decontamination method for surfaces which are otherwise resistant to such processes if delivered with traditional methods. The studies revealed inter-material compatibility between stationery, varnish coatings, plastics, and electronic, optical, and optoelectronic components.
Źródło:
Bezpieczeństwo i Technika Pożarnicza; 2017, 47, 3; 28-44
1895-8443
Pojawia się w:
Bezpieczeństwo i Technika Pożarnicza
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydrogen Peroxide as a High Energy Compound Optimal for Propulsive Applications
Autorzy:
Rarata, G.
Rokicka, K.
Surmacz, P.
Powiązania:
https://bibliotekanauki.pl/articles/358739.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
hydrogen peroxide
HTP
explosibility
detonability
monopropellant
oxidizer
propulsion
Opis:
This paper presents the authors’ experience in the field of the safe preparation and utilisation of HTP (98%+), a storable propellant that is finding use in various engineering applications. Brief characterisations of the material as well as examples of its potential use within relevant industries are provided. Additionally, some of the existing data and current research are included to demonstrate the full potential of this material which meets most of the needs of the propulsion industry. The laboratory technique for obtaining the substance that has been developed recently at the Institute of Aviation is briefly described. Utilisation of the method based on a special glass apparatus allows reproducible amounts of the substance to be obtained with relatively little risk.
Źródło:
Central European Journal of Energetic Materials; 2016, 13, 3; 778-790
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling for Detonation and Energy Release from Peroxides and Non-Ideal Improvised Explosives
Autorzy:
Price, M. A.
Ghee, A. H.
Powiązania:
https://bibliotekanauki.pl/articles/358812.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
improvised explosive
non-ideal
reactive flow
ANFO
peroxide
Opis:
This work focuses on the development of models for predicting explosive power and air blast from the detonation of organic peroxides (TATP and HMTD) and non-ideal explosives involving ammonium nitrate, urea nitrate, and chlorates. CHEETAH calculations assuming ideal behaviour are in agreement with literature data for peroxides. However, the detonation behaviour of non-ideal explosives is dependent on charge size and confnement. This behaviour is investigated using thermo-chemical calculations with Kinetic CHEETAH, and reactive fow models with AUTODYN. A simplifed ignition and growth (I&G) model was calibrated using experimental charge diameter vs. VoD data. I&G models are used to predict the front curvature, reaction zone structure, and energy release from the non-ideal explosives. Detonation and air blast predictions for peroxides and unconfned and confned (paper, plastic, steel) non-ideal charges are presented.
Źródło:
Central European Journal of Energetic Materials; 2009, 6, 3-4; 239-254
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 212

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