Temat: methylene blue - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Preparation and characterisation of new biomaterials based on chitosan iodide with biologically active dyes
Autorzy:: Kalinkevich, Oksana
Sklyar, Anatoly
Kalinkevich, Aleksei
Chivanov, Vadym
Zinchenko, Yevgen
Trofimenko, Yana
Starikov, Vadim
Sofronov, Dmitry
Holubnycha, Viktoriia
Tematy:: chitosan
fuchsine
iodine
methylene blue; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Powiązania:: https://bibliotekanauki.pl/articles/2131507.pdf Link otwiera się w nowym oknie
Opis:: New composite materials were obtained based on chitosan iodide and organic dyes – methylene blue and fuchsine in fucorcin (Castellani liquid) – by using a simple synthetic procedure. The materials were characterised by scanning electron microscopy, X-ray diffraction, temperature-programmed desorption mass spectrometry, infrared spectroscopy and visible and ultraviolet light spectroscopy. The dyes in the composites were distributed uniformly and did not form separate phases. These composites could form structured porous sponges and films and therefore be used in various fields of application. The materials displayed antibacterial activity against antibiotic resistant gram-positive and gram-negative bacteria.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Synthesis of nanocomposite chitosan-tio2 and its application as photodegradation agent of methilen blue in aqueous medium
Autorzy:: Mohadi, Risfidian
Kurniawan, Christina
Yuliasari, Nova
Hidayati, Nurlisa
Lesbani, Aldes
Tematy:: chitosan
methylene blue
nanocomposite
photodegradation; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
Powiązania:: https://bibliotekanauki.pl/articles/1034905.pdf Link otwiera się w nowym oknie
Opis:: Synthesis of nanocomposite chitosan-TiO2 have been done. Nanocomposite made of chitosan was isolated from crab shell namely α-chitosan and squid pens as β-chitosan. Nanocomposite was synthesized by combining the function of chitosan as supporting material with TiO2 particle that have high photocatalytic activity. The nanocomposite characterized by FTIR and SEM/EDX analysis show the functional groups of chitosan and and also surface morphology of nanocomposite chitosan-TiO2. The FTIR spectra shows adsorption band of O-Ti-O at 677-695 cm-1, and characteristic adsorption band of chitosan at wavenumbers 1600 cm-1 for -NH2 and 3400 cm-1 for -OH. From SEM/EDX analysis can be seen that TiO2 has been distributed evenly on surface of chitosan. The nanocomposite was applied for photodegradation of methylene blue in aqueous medium on UV light radiation. The optimum percent photodegradation at wavelength 660 nm by the nanocomposite α-chitosan-TiO2 and β-chitosan-TiO2 are 59,48% and 59,82%, respectively.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Comparison of Two Biosorbent Beads for Methylene Blue Discoloration in Water
Autorzy:: Purwiandono, Gani
Lestari, Puji
Tematy:: adsorption
alginate encapsulation
biosorbents
methylene blue; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/59114100.pdf Link otwiera się w nowym oknie
Opis:: In this study, alginate-encapsulated biosorbents have been prepared from agricultural wastes viz. peanut shells and rice husks. Biosorbents in this study were referred as En-PS and En-RH for the adsorbents prepared from peanut shells and rice husks, respectively. The characteristics of the adsorbents were thoroughly investigated using scanning electron microscope, X-ray diffractometer, surface area analyzer, and Fourier-transform infrared spectrophotometer instruments. The prepared biosorbents were used as adsorbents for cationic methylene blue (MB) dye in water. The encapsulation process using sodium alginate simplified the separation of adsorbent from the water after the adsorption process. The adsorptions of MB onto both adsorbents followed the pseudo-second order model and fitted both Langmuir and Freundlich isotherm models. Thermodynamic studies revealed that the adsorption of MB onto En-PS and En-RH was a spontaneous and endothermic process with the ΔG° reaction of -1.694 and -2.028 kJ/mol at the room temperature, respectively. Biosorbents could be used in the adsorption-desorption process for up to 3 cycles.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Ifosfamide-induced encephalopathy in a patient with metastatic fibrosarcoma
Autorzy:: Galus, Łukasz
Tematy:: encephalopathy
fibrosarcoma
ifosfamide
methylene blue
thiamine; Pokaż więcej
Wydawca:: Medical Education
Powiązania:: https://bibliotekanauki.pl/articles/1064796.pdf Link otwiera się w nowym oknie
Opis:: Ifosfamide is a cytostatic drug commonly used in chemotherapy. One of the common adverse effects resulting from the treatment with ifosfamide is encephalopathy. This paper describes a case study of a 64-year-old patient who suffered from a full-blown encephalopathy as a result of chemotherapy administered during the treatment of fibrosarcoma of the femur. It provides a hypothesis of the mechanism behind toxic effects of ifosfamide on the central nervous system and elaborates on a number of documented ways of preventing aforementioned complications.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Management of a patient with thermal burns and para-chloronitrobenzene poisoning
Autorzy:: Zhang, Yuanhai
Wang, Xingang
Ni, Liangfang
Jiang, Ruiming
Liu, Liping
Ye, Chunjiang
Han, Chunmao
Tematy:: chemical burns
methaemoglobinaemia
Methylene Blue
para-chloronitrobenzene; Pokaż więcej
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Powiązania:: https://bibliotekanauki.pl/articles/2178908.pdf Link otwiera się w nowym oknie
Opis:: Para-chloronitrobenzene (p-CNB), a hazardous and toxic substance, is widely used as an intermediary in chemical industries. p-CNB can cause methaemoglobinaemia due to electron-withdrawing properties of the nitro and chlorine groups. We present a case of a 23-year-old man suffering from thermal burns and p-CNB poisoning. In this case, severe methaemoglobinaemia was caused by the absorption of p-CNB through the burn wounds. Despite active treatment, such as the antidote of methylene blue, the patient’s methaemoglobinaemia progressed, with slowly increasing methaemoglobin (MetHb) level. This case highlights the complexity and difficulty of managing this type of injury. To our knowledge, this case can be the first case report describing methaemoglobinaemia induced by p-CNB in a patient with thermal burns.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Multispectral imaging using fluorescent properties of indocyanine green and methylene blue in colorectal surgery - initial experience
Autorzy:: Swierblewski, Maciej
Skokowski, Jaroslaw
Migaczewski, Marcin
Pędziwiatr, Michał
Kalinowski, Leszek
Polom, Karol
Polom, Wojciech
Matuszewski, Marcin
Cwalinski, Tomasz
Opis:: Introduction: Image-guided surgery is becoming a new tool in colorectal surgery. Intraoperative visualisation of different structures using fluorophores helps during various steps of operations. In our report, we used two fluorophores—indocyanine green (ICG), and methylene blue (MB)—during different steps of colorectal surgery, using one camera system for two separate near-infrared wavelengths. Material and methods: Twelve patients who underwent complex open or laparoscopic colorectal surgeries were enrolled. Intravenous injections of MB and ICG at different time points were administered. Visualisation of intraoperative ureter position and fluorescent angiography for optimal anastomosis was performed. A retrospective analysis of patients treated in our departments during 2020 was performed, and data about ureter injury and anastomotic site complications were collected. Results: Intraoperative localisation of ureters with MB under fluorescent light was possible in 11 patients. The mean signal-to-background ratio was 1.58 ± 0.71. Fluorescent angiography before performing anastomosis using ICG was successful in all 12 patients, and none required a change in position of the planned colon resection for anastomosis. The median signal-to-background ratios was 1.25 (IQR: 1.22–1.89). Across both centres, iatrogenic injury of the ureter was found in 0.4% of cases, and complications associated with anastomosis was found in 5.5% of cases. Conclusions: Our study showed a substantial opportunity for using two different fluorophores in colorectal surgery, whereby the visualisation of one will not change the possible quantification analysis of the other. Using two separate dyes during one procedure may help in optimisation of the fluorescent properties of both dyes when using them for different applications. Visualisation of different structures by different fluorophores seems to be the future of image-guided surgery, and shows progress in optical technologies used in image-guided surgery.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 7.

Tytuł:: Composite nanoarchitectonics of graphene oxide for better understanding on structural efects on photocatalytic performance for methylene blue dye
Autorzy:: Abd-Elnaiem, Alaa
Alsaaq, Faisal
Abd El-Baki, Randa F.
Hamad, D.
Orzechowska, Sylwia
Opis:: The fabrication of graphene/graphene oxide bounded metal nanostructures, to form hybrid composites, and their utilization for the remediation of organic dyes have been received much attention because of their economic, safety, and environmental points of view. The aim of the present study was the synthesis and structural characterization of various types of graphene oxide (GO) and GO nanocomposites and the analysis of their morphology and photocatalytic activities. The GO nanoparticles and GO bounded Au and ZnO nanocomposites have been synthesized by the modifed hummers, and ultrasonic-assisted solution methods. The structural investigation of the synthesized nanocomposites was carried out using X-ray difraction, Fourier transforms infrared radiation, and transmission electron microscopy. Meanwhile, their photocatalytic activities were investigated, using various models, by the degradation of methylene blue (MB) under simulated visible–ultraviolet irradia tion. The maximum efciency and performance of the photodegradation were observed for the porous graphene oxide (PGO) nanoparticles. The models such as pseudo-frst and second-order, intra-particle difusion, Boyd, and Elovic have applied to detailed study the mechanisms of the photocatalytic degradation process. According to the experimental results, the PGO has a high performance for MB-based wasted water compared to other investigated catalysts.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 8.

Tytuł:: Extraction, growth and immobilization of Yarrowia lipolytica yeast cells for dye effluent treatment
Autorzy:: Mupa, M.
Kubara, R.
Gere, J.
Tematy:: methylene blue
immobilization
sorption
Yarrowia lipolytica yeast
biosorbents; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/205308.pdf Link otwiera się w nowym oknie
Opis:: The removal of organic dyes from industrial wastewater remains a problem, both technically and economically. In this study, Yarrowia lipolytica yeast cells were isolated from poultry meat and immobilized using alginate. The immobilized Yarrowia lipolytica yeast was used as biosorbent to remove methylene blue (MB) dye from synthetic effluent water. The results show that maximum adsorption capacity under optimum conditions was 66.67 mg∙g^-1. The equilibrium adsorption data fitted well onto the Freundlich adsorption isotherms with R²>0.99. Adsorption kinetics was of pseudo-second order process suggesting that the adsorption was a chemisorption. FTIR spectra identified typical absorption bands of a biosorbent. Sorption of MB dye on Yarrowia lipolytica yeast cells was exothermic with weak sorption interaction.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Comparative Adsorption of Methylene Blue Dye on Hexane-Washed and Xanthated Spent Grated Coconut (Cocos nucifera L.): Isotherms, Thermodynamics, and Mechanisms
Autorzy:: Khalid, Khadijah
Hanafiah, Megat Ahmad Kamal Megat
Al-Amrani, Waheeba A.
Malek, Nik Ahmad Nizam Nik
Fatinathan, Sharon
Tematy:: adsorption
isotherm
mechanism
methylene blue
spent grated coconut; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/2068470.pdf Link otwiera się w nowym oknie
Opis:: A batch system investigated the application of two types of chemically modified biosorbents derived from spent grated coconut (Cocos nucifera) powder to adsorb methylene blue (MB) from aqueous solutions. The biosorbents were characterised by spectroscopic and quantitative analyses. The assessment of MB adsorption onto the investigated biosorbents was studied at different experimental conditions with different pHs (2–9) and different initial concentrations of MB (10–400 mg/L) at three different temperatures (298, 308, and 318 K). The maximum adsorption capacity (qmax) of xanthated spent grated coconut (XSGC) was higher than that of hexane-washed spent grated coconut (HSGC). The thermodynamic study indicated that the MB adsorption process was spontaneous for both biosorbents. Desorption of MB-loaded biosorbents was carried out using HCl, NaOH, and Na2EDTA solutions. A desorption ratio of more than 90% was obtained over three adsorption/desorption cycles for HSGC. However, XSGC demonstrated poor MB desorption, implying a stronger MB interaction with XSGC, which could be attributed to H-bonding, Yoshida H-bonding, n-π, and π-π bonding. The study showed that HSGC and XSGC could be applied as biosorbents to remove low MB concentrations from aqueous solutions.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Enhanced Adsorption of Methylene Blue dye using Groundnut Shell Activated Nanocarbon: A Sustainable Approach
Autorzy:: Reddy, Muppidi Teja Gangadhar
Chidambaram, Prabu Padanillay
Palanisamy, Jothimani
Devasahayam, Jeya Sundara Sharmila
Ponnaian, Vijayakumary
Kalimuthu, Raja
Shannmugam, Pooluvapatty Murugan
Tematy:: groundnut shell
activated carbon
KOH
methylene blue
adsorption; Pokaż więcej
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Powiązania:: https://bibliotekanauki.pl/articles/58907770.pdf Link otwiera się w nowym oknie
Opis:: In this work, activated nanocarbon derived from lignocellulose-rich groundnut shells was synthesized by KOH impregnation to enhance surface area and porosity, resulting in Groundnut Shell Activated Nanocarbon (GSANC) and thoroughly characterized for its porosity, particle size, crystallinity, combustion profile, functional groups, and surface morphology. It exhibited a type I N2 adsorption-desorption isotherm with an H4 hysteresis loop, indicative of a mix of micro and mesopores, with a high specific surface area of 665.80 m² g-1 and an average pore diameter of 2.97 nm. This nanoparticulate activated carbon exhibited exceptional performance in methylene blue (MB) dye adsorption, achieving a maximum adsorption capacity (qmax) of 212.76 mg g-1. The adsorption mechanisms included electrostatic interactions, π-π stacking, and hydrogen bonding, contributing significantly to its efficacy as an adsorbent highlighting its potential for applications in wastewater treatment.
Dostawca treści:: Biblioteka Nauki

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