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Tytuł:
GENTIAN VIOLET: WHAT WE KNOW AND WHAT IS AHEAD OF US
Autorzy:
Dragan, Jędrzej
Michalak, Sylwia S.
Powiązania:
https://bibliotekanauki.pl/articles/895376.pdf
Data publikacji:
2019-06-28
Wydawca:
Polskie Towarzystwo Farmaceutyczne
Tematy:
p53
Crystal Violet
Gentian Violet
fungal infection
bacterial infection
Opis:
At present, the only active substance of Gentian Violet (GV) is methylrosaniline - a triphenylmethane dye of which amino group contains 2 methyl groups. GV can be used to treat uncomplicated bacterial and/or yeast infections, support antibiotic therapy of more severe infections, but also to protect medical equipment against colonization by microorganisms. In the light of recent studies, there are many new possibilities for GV application. It has been shown to be effective in the treatment of viral infections, some chronic skin diseases and oncology. GV can induce apoptosis of tumor cells among others by elevating caspase 8, inhibiting NADPH oxidases, decreasing mitochondrial thioredoxin 2 or inhibiting STAT3/SOX2 axis. Preclinical and in vitro studies have also demonstrated GV efficacy in the treatment of breast cancer, melanoma tumors and cutaneous T-cell lymphoma. There is no unambiguous evidence indicating the toxicity of GV, whereas its safety has been proven by its long history of use, its inclusion in numerous guidelines and its legal trade and distribution with no specific approval requested in many countries around the world. The article gathers the available knowledge about GV and its potential use in the future.
Źródło:
Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 3; 389-396
0001-6837
2353-5288
Pojawia się w:
Acta Poloniae Pharmaceutica - Drug Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usuwanie barwnika Basic Violet 10 z roztworów wodnych na zeolicie
Basic violet 10 dye removal from water solutions onto zeolite
Autorzy:
Filipkowska, U.
Rodziewicz, J.
Moczkowska, I.
Powiązania:
https://bibliotekanauki.pl/articles/1819681.pdf
Data publikacji:
2010
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
barwnik basic violet 10
zeolit
roztwór wodny
dye basic violet 10
zeolite
aqueous solution
Opis:
Rozwój technologii dostarcza nie tylko produkty o ulepszonej jakości lecz również wpływa na postępujące skażenie środowiska. W przypadku przemysłu włókienniczego zanieczyszczenie to dotyczy głównie wody. Chemiczna obróbka wyrobów włókienniczych jest przyczyną powstawania ścieków o znacznej zawartości barwników, soli, kwasów, zasad, chemicznych środków pomocniczych, klejonek tkackich itp. [1]. Skład odprowadzanych zanieczyszczeń wpływa na złożoność i koszty procesu ich oczyszczania, a tym samym stanowi obecnie jeden z kluczowych problemów środowiskowych [2]. Przedmiotem coraz częstszych badań jest więc opracowanie takiej metody oczyszczania ścieków, której efekty pozwoliłyby na ponowne wykorzystanie oczyszczonej wody w procesach technologicznych. Obecnie najczęściej stosowanymi metodami oczyszczania ścieków włókienniczych są: adsorpcja, strącanie/koagulacja, ultrafiltracja i odwrócona osmoza, metody biologiczne, utlenianie, redukcja, ekstrakcja [3]. Spośród nich, największe uzasadnienie ekonomiczne związane z minimalizacją kosztów inwestycyjnych i eksploatacyjnych procesu oczyszczania ścieków zawierających barwniki, mogą wykazywać procesy adsorpcji. Powszechnie stosowanymi adsorbentami są węgle aktywne, niemniej jednak ich wysoka cena wymusza poszukiwania nowych, tańszych a jednocześnie równie skutecznych środków [4]. W związku z tym rozwiązania koncentrują się coraz częściej na wdrażaniu naturalnych minerałów, których szerokie możliwości zastosowań, skuteczność ale także ekologiczne bezpieczeństwo użycia, są inspiracją wielu rozwiązań we współczesnych technologiach. Stąd, w ostatnich latach coraz większe zainteresowanie budzą naturalne, ogólnodostępne, tanie minerały o właściwościach molekularno-sitowych, sorpcyjnych i jonowymiennych -zeolity [5].
Contemporarily, the most common methods of textile wastewaters treatment include: adsorption, precipitation/coagulation, ultrafiltration and reversed osmosis, biological methods, oxidation, reduction, and extraction. Out of these methods, the most economical in terms of minimizing investment and exploitation costs of the treatment process of wastewaters containing dyes, are adsorption processes. Commonly applied adsorbents include activated carbons, however their high price enforces searching from new, cheaper and, simultaneously, equally effective agents. For this reason, studies are increasingly focused on implementingnatural materials whose wide applicability, efficiency as well as ecological safety of use inspire a number of solutions in contemporary technologies. Hence, an increasing interest has been raised recently by natural, commonlyavailable, inexpensive minerals with molecular and screening as well as sorptive and ion-exchanging properties, namely zeolites. The reported research was aimed at determining the effectiveness of dyes removal from aqueous solutions with the method of adsorption, using zeolite differing in grain size - coarse-grained zeolite with grain particle size of ? 2-3 mm (sorbent 1) and fine-grained zeolite with grain particle size of ? 0.5-1 mm (sorbent 2). The research was conducted for the cationic dye ? Basic Violet 10 (BV10). The scope of the research included determination of the effectiveness of Basic Violet 10 dye adsorption onto two adsorbents (coarse-grained and finegrained zeolite) and determination of constants from the Langmuir's equation. Basic dyes are dyes that solubilize in water with a color cation produced. The mechanism of basic dyes binding from aqueous solutions may be explained by the intensive donation of a molecular cation (C+), and reduction of an ion (CH+). In water, molecules of zeolite are characterized by a negative charge and electrostatic activity, which induces adsorption of basic dyes. The process of cationic dyes adsorption proceeds considerably weaker at low pH values as a result of the excess of H+ ions that compete with the cationic groups of the dye. Results achieved in the research enable concluding that zeolite is an effective adsorbent in the process of a basic dye BV 10 removal from aqueous solutions. The study demonstrated that the size of adsorbent particles, pH value and duration of adsorption had a significant effect on the effectiveness of the adsorption process. The highest adsorption capacity was achieved for the basic dye BV 10 during adsorption onto fine-grained zeolite at pH 9.0 and accounted for 258 mg/g d.m. In contrast, the lowest adsorption capacity reaching 52 mg/g d.m. was obtained for the BV 10 dye onto the coarse-grained zeolite at pH 3.0. An opposite tendency was noted in the case of adsorption affinity. Along with increasing adsorption capacity, a decrease was recorded in the affinity, irrespective of zeolite grain particle size. The highest adsorption affinity, accounting for 0.428 dm3/mg, was achieved for the Basic Violet 10 dye during adsorption onto the coarse-grained zeolite at pH 3.0. In turn, the lowest value of that parameter, reaching 0.019 dm3/mg, was obtained for the coarse-grained zeolite at pH 9.0. Natural zeolite may, thus, be applied as an adsorbent displaying a high effectiveness of basic dyes removal.
Źródło:
Rocznik Ochrona Środowiska; 2010, Tom 12; 747-760
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of carrageenan/multi-walled carbon nanotube hybrid hydrogel nanocomposite for adsorption of crystal violet from aqueous solution
Autorzy:
Hosseinzadeh, H.
Powiązania:
https://bibliotekanauki.pl/articles/780038.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
carrageenan
hydrogel
nanocomposite
carbon nanotube
adsorption
crystal violet
Opis:
A novel polysaccharide-based hydrogel nanocomposite was prepared using grafting of acrylic acid (AA) on to kappa-carrageenan (κC) by incorporating multi-walled carbon nanotube (MCNT). In fact, MCNTs were used as nano-sized reinforcements in the synthesized nanocomposite. Spectroscopy together with morphology proved relatively strong κC-MCNT interaction. Besides, the swelling behavior of the nanocomposite hydrogel was studied. The results showed that in the presence of MCNTs, the equilibrium swelling capacity was decreased. This can be attributed to cross-linking role and hydrophilicity nature of MCNTs. The adsorption performance of hydrogel nanocomposite was also investigated for the removal of crystal violet (CV) as a cationic dye. The effects of some important parameters such as MCNT concentration, pH and contact time on the uptake of CV solution were studied. Equilibrium adsorption isotherm data of the hydrogel exhibited better fit to the Langmuir than to the Freundlich isotherm model. According to this model, the maximum adsorption capacity of κC-based hydrogel nanocomposite was found to be 118 mg . g–1.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 2; 70-76
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Disinfection Properties of Conventional White LED Illumination and Their Potential Increase by Violet LEDs for Applications in Medical and Domestic Environments
Autorzy:
Buehler, Jule
Sommerfeld, Florian
Meurle, Tobias
Hoenes, Katharina
Hessling, Martin
Powiązania:
https://bibliotekanauki.pl/articles/2024030.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
antimicrobial
visible light
illumination
white
violet
LEDs
staphylococci
Opis:
The antimicrobial impact of visible violet and blue light has been known for more than a century but hardly been applied for purposeful pathogen reduction or prevention. The disinfecting properties of wide-spread warm-white and cool-white light emitting diodes (LEDs) are investigated by irradiation of staphylococci with different LEDs and varying doses. Additionally, the combination of a white and a violet LED illumination is examined. Both white LEDs exhibit an antimicrobial effect, which seems to be dominated by the blue parts of the LED emissions. Unfortunately, the antimicrobial effect is weak in realistic illumination applications. Additional violet LEDs can significantly enhance this impact without a large change in human color perception. This allows reasonable applications in certain medical and domestic environments without endangering humans.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 2; 169-175
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of sawdust immobilised on chitosan for disposal of dyes from water solutions
Autorzy:
Szymczyk, Paula
Filipkowska, Urszula
Jóźwiak, Tomasz
Kuczajowska-Zadrożna, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/1034629.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
Basic Violet 10
Reactive Black 5
chitosan
immobilisation
sawdust
sorption
Opis:
In this article, the sorption properties of chitosan hydrogel beads, beech sawdust and sawdust immobilised on chitosan in relation to Reactive Black 5 (RB5) and Basic Violet 10 (BV10) dyes were compared. In the conducted research, the sorption capacities of the sorbents, sorption pH and the point of zero charge (pHZPC) were determined. For the description of the obtained results, the double Langmuir model has been used. The highest effectiveness of the cationic and anionic dye removal on chitosan hydrogel beads and sawdust immobilised on chitosan was obtained at pH 4, whereas on sawdust, the pH was 3. The best sorbent in relation to the RB5 dye was obtained using chitosan hydrogel beads, and in relation to BV10, it was sawdust. The maximum sorption capacity of chitosan in relation to RB5 was 875.66 mg/g, whereas the sorption capacity of sawdust in relation to BV10 was 30.15 mg/g. The research has shown that the sorbent in the form of sawdust immobilised on chitosan had a high sorption capacity in relation to anionic as well as cationic dyes. Immobilisation of sawdust on chitosan led to the creation of a universal sorbent in relation to cationic and anionic dyes.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2017, 22; 207-219
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Batch Adsorption Studies on Rice Husk with Methyl Violet Dye
Autorzy:
Omokpariola, Daniel Omeodisemi
Otuosorochi, Joy Njoku
Powiązania:
https://bibliotekanauki.pl/articles/1031501.pdf
Data publikacji:
2021
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Rice husks powder
adsorption
kinetics
methyl red dye
methyl violet
thermodynamics
Opis:
The potential of rice husks powder (RHP) for the removal of methyl violet dye from aqueous solution was investigated. Batch adsorption studies were conducted and various parameters such as contact time, adsorbent dosage, initial dye concentration, pH and temperature were studied to observe their effects in the dye adsorption process. The optimum conditions for the adsorption of MV onto the adsorbent (RHP) was found to be: contact time (100 min) pH (10.0) and temperature (303 K) for an initial dye concentration of 50 mg/l and adsorbent dose of 1.0 g respectively. The experimental equilibrium adsorption data fitted best and well to the Freundlich Isotherm model for both dyes adsorption. The maximum adsorption capacity was found to be 1.66 mg/g for the adsorption of MV dye. The kinetic data conformed to the pseudo second order kinetic model. Thermodynamic quantities such as Gibbs free energy (ΔGº), enthalpy (Δº) and entropy (ΔSº) were evaluated and the negative values of ΔGº, ΔHº and ΔSº obtained indicate the spontaneous and exothermic nature of the adsorption process.
Źródło:
World News of Natural Sciences; 2020, 33; 48-63
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of an optical catalyst for cracking contaminating dyes in the wastewater of factories using indium oxide in nanometer and usage in agriculture
Autorzy:
Ahmed, Ishaq F. E.
El-Shenawy, Ahmed I.
Refat, Moamen S.
Powiązania:
https://bibliotekanauki.pl/articles/778735.pdf
Data publikacji:
2019
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Photocatalyst
In2O3
precursors
Crystal Violet
Congo Red
NPs
Opis:
Herein, the photocatalytic degradation of the Congo Red (CR) and Crystal Violet (CV) dyes in an aqueous solution were discussed in the presence of an indium(III) oxide (In2O3) as optical catalyst efficiency. The caproate bidentate indium(III) precursor complex has been synthesized and well interpreted by elemental analysis, molar conductivity, Fourier transform infrared (FT-IR), UV-Vis, and thermogravimetric (TGA) with its differential thermogravimetric (DTG) studies. The microanalytical and spectroscopic assignments suggested that the associated of mononuclear complex with 1:3 molar ratio (M3+:ligand). Octahedral structure is speculated for this parent complex of the caproate anion, CH3(CH2)4COO− ligand. The In2O3  NPs with nanoscale range within 10–20 nm was synthesized by a simple, low cost and eco-friendly method using indium(III) caproate complex. Indium oxide nanoparticles were formed after calcination of precursor in static air at 600°C for 3 hrs. The structural, grain size, morphological and decolorization efficiency of the synthesized NPs were characterized using the FT-IR, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and transmission electron microscopy (TEM) analyses. It was worthy mentioned that the prepared In2O3  NPs showed a good photodegradation properties against CR and CV organic dyes during 90 min.
Źródło:
Polish Journal of Chemical Technology; 2019, 21, 4; 98-105
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of dyes from aqueous solutions by glauconite immobilised on chitosan hydrogel beads
Autorzy:
Jóźwiak, Tomasz
Filipkowska, Urszula
Szymczyk, Paula
Kuczajowska-Zadrożna, Małgorzata
Mielcarek, Artur
Powiązania:
https://bibliotekanauki.pl/articles/1034580.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Tematy:
Basic Violet 10
Reactive Black 5
chitosan
glauconite
hydrogel beads
immobilisation
sorption
Opis:
The sorption capacity of glauconite, glauconite immobilised on chitosan hydrogel beads and unmodified chitosan hydrogel beads against Reactive Black 5 and Basic Violet 10 was compared in this article. The effect of pH on the sorption effectiveness of dyes on the tested sorbents was investigated and the sorption capacity of sorbents after 24 and 72 h was determined. Langmuir sorption, double Langmuir and Freundlich isotherms were used to describe the experimental data. The adsorption efficiency of the dyes on sorbents containing chitosan was highest at pH 4. In the case of glauconite, Reactive Black 5 removal efficiency was the highest at pH 3, and Basic Violet 10 removal efficiency was highest at pH 2. The sorption capacity of glauconite immobilised on chitosan hydrogel spheres obtained after 72 h was -656.73 mg/g and -32.77 mg/g for Reactive Black 5 and Basic Violet 10, respectively.
Źródło:
Progress on Chemistry and Application of Chitin and its Derivatives; 2017, 22; 54-65
1896-5644
Pojawia się w:
Progress on Chemistry and Application of Chitin and its Derivatives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The application of selected activated carbons to dye wastewater treatment
Wykorzystanie wybranych węgli aktywnych do oczyszczania ścieków farbiarskich
Autorzy:
Picheta-Oleś, A.
Powiązania:
https://bibliotekanauki.pl/articles/402308.pdf
Data publikacji:
2010
Wydawca:
Politechnika Świętokrzyska w Kielcach. Wydawnictwo PŚw
Tematy:
węgiel aktywny
ścieki farbiarskie
sorpcja
fiolet krystaliczny
activated carbon
dye wastewater
crystal violet
Opis:
In the presented study I have undertaken the research concerning the efficiency of dye removal which is crystal violet (the dye used for fabric dying and production of printing paste) from water solution with the use of activated carbons. In the research I have used fresh commercial active carbons WDex and WG-12. These carbons differ in their porous structure parameters (S, V, iodine, methylene and detergent values) as well as chemical properties of the surface (surface acidity, ability to dechlorine). It has been found that having the initial dye concentration 20 mg/L in the presence of activated carbons, the process of solution decolourisation takes place. Sorption capacity of activated carbon WDex equals 35 mg/g and in case of WG-12 – 12 mg/g. The sorption process of examined activated carbons is better described by Langmuir isotherm.
Źródło:
Structure and Environment; 2010, 2. no. 3; 52-58
2081-1500
Pojawia się w:
Structure and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performances in tank cleaning
Autorzy:
Panaitescu, V. A.
Panaitescu, M.
Panaitescu, F. V.
Martes, L.
Powiązania:
https://bibliotekanauki.pl/articles/116037.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
tank cleaning
ship operation
chemicals
impact cleaning
rinsing
ultra-violet spectroscopy
MARPOL
Permanganate Time Test (PTT)
Opis:
There are several operations which must do to maximize the performance of tank cleaning. The new advanced technologies in tank cleaning have raised the standards in marine areas. There are many ways to realise optimal cleaning efficiency for different tanks. The evaluation of tank cleaning options means to start with audit of operations: how many tanks require cleaning, are there obstructions in tanks (e.g. agitators, mixers), what residue needs to be removed, are cleaning agents required or is water sufficient, what methods can used for tank cleaning. After these steps, must be verify the results and ensure that the best cleaning values can be achieved in terms of accuracy and reliability. Technology advancements have made it easier to remove stubborn residues, shorten cleaning cycle times and achieve higher levels of automation. In this paper are presented the performances in tank cleaning in accordance with legislation in force. If tank cleaning technologies are effective, then operating costs are minimal.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 1; 159-163
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
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