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Methanol poisoning

Gumaa A El-Nagar, Christina Roth
The current study addresses, for the first time, the promoting effect of some selected fuel blending components, such as methanol (MeOH), ethanol (EtOH) and acetaldehyde (ACTA), on the glucose electrooxidation at a nano-chitosan-NiOOH modified GC electrode (nano-CS-NiOOH/GC). Blending glucose with different molar ratios of MeOH, EtOH and ACTA results in a significant enhancement in the fuel utilization, NiOOH oxidation capacity and turnover number of oxidized glucose molecules compared to the pure fuels. For instance, the use of glucose fuel blends composed of 40% of glucose with 60% of either MeOH, EtOH and ACTA results in 10, 8 and 5 times higher glucose activity of the nano-CS-NiOOH/GC electrode compared to using glucose as a pure fuel, respectively...
January 6, 2017: Physical Chemistry Chemical Physics: PCCP
Ji Hyun Choi, Seung Keun Lee, Young Eun Gil, Jia Ryu, Kyunghee Jung-Choi, Hyunjoo Kim, Jun Young Choi, Sun Ah Park, Hyang Woon Lee, Ji Young Yun
Methanol poisoning results in neurological complications including visual disturbances, bilateral putaminal hemorrhagic necrosis, parkinsonism, cerebral edema, coma, or seizures. Almost all reported cases of methanol poisoning are caused by oral ingestion of methanol. However, recently there was an outbreak of methanol poisoning via non-oral exposure that resulted in severe neurological complications to a few workers at industrial sites in Korea. We present 3 patients who had severe neurological complications resulting from non-oral occupational methanol poisoning...
February 2017: Journal of Korean Medical Science
J Y Ai, Y J Wang, J Q Liu
No abstract text is available yet for this article.
October 20, 2016: Chinese Journal of Industrial Hygiene and Occupational Diseases
M Abdullah, S K Kamarudin, L K Shyuan
In this study, TiO2 nanotubes (TNTs) were synthesized via a hydrothermal method using highly concentrated NaOH solutions varying from 6 to 12 M at 180 °C for 48 h. The effects of the NaOH concentration and the TNT crystal structure on the performance for methanol oxidation were investigated to determine the best catalyst support for Pt-based catalysts. The results showed that TNTs produced with 10 M NaOH exhibited a length and a diameter of 550 and 70 nm, respectively; these TNTs showed the best nanotube structure and were further used as catalyst supports for a Pt-based catalyst in a direct methanol fuel cell...
December 2016: Nanoscale Research Letters
Xinglan Peng, Duhong Chen, Xiulin Yang, Dongsheng Wang, Mengliu Li, Chien-Chih Tseng, Rajapandiyan Panneerselvam, Xiao Wang, Wenjing Hu, Jianniao Tian, Yanchun Zhao
A well-dispersed PtCu alloy nanoparticles (NPs) on three-dimensional nitrogen-doped graphene (PtCu/3D N-G) electrocatalyst has been successfully synthesized by a conventional hydrothermal method combined with a high-efficiency microwave-assisted polyol process. The morphology, composition, and structures are well-characterized by scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, X-ray powder diffraction, and X-ray photoelectron spectroscopy. Cyclic voltammograms illustrate that the as-prepared PtCu/3D N-G electrocatalyst possesses the larger electrochemical active surface area, lower onset potential, higher current density, and better tolerance to CO poisoning than PtCu NPs on reduced graphene oxide and XC-72 carbon black in acid solution...
December 14, 2016: ACS Applied Materials & Interfaces
Mutiat Ibrahim, Nutan Kaushik, Abimbola Sowemimo, Hemraj Chhipa, Trevor Koekemoer, Maryna van de Venter, Olukemi A Odukoya
CONTEXT: Plants harbor endophytes with potential bioactivity. Markhamia tomentosa (Benth) K. Schum ex. Engl. (Bignoniaceae) is reported to possess antioxidant, anti-inflammatory and anticancer activities. OBJECTIVE: The antifungal and antiproliferative properties of endophytic fungi extracts and fractions from M. tomentosa were evaluated. MATERIAL AND METHODS: Endophytic fungi were isolated from the leaves of M. tomentosa and identified by ITS-rDNA sequence analysis...
December 2017: Pharmaceutical Biology
Liang Huang, Yujie Han, Xueping Zhang, Youxing Fang, Shaojun Dong
Ultrathin PtxPb nerve-like nanowires (NNWs) with a diameter of only around 3.6 nm were synthesized by a one-step wet-chemical strategy, and they served as robust catalysts for greatly enhancing methanol electrooxidation both under acidic and alkaline conditions. Due to the high CO-poisoning tolerance, superior electrocatalytic activity and stability endowed by the Pt-Pb alloyed composition and the unique structure, the Pt3.5Pb NNWs showed the highest specific activity of 2.78 mA cm(-2) in acidic media and 6...
January 7, 2017: Nanoscale
Zexing Wu, Rong Liu, Jie Wang, Jing Zhu, Weiping Xiao, Cuijuan Xuan, Wen Lei, Deli Wang
Three-dimensional, hollow-structured carbon sphere nanocomposites (N,S-hcs) doped with nitrogen and sulfur were prepared using a soft template approach followed by a high-temperature treatment. The synthesized N,S-hcs nanomaterials exhibited favourable catalytic activity for the oxygen reduction reaction (ORR) compared to carbon spheres doped solely with nitrogen (N-hcs), polypyrrole (PPY) solid nanoparticles and irregular fragments of polyaniline (PAN). These results demonstrated the co-doping of N/S and the relatively large surface area of the mesoporous carbon structure that enhanced the catalytic activity of the resulting material...
December 7, 2016: Nanoscale
Sergey Zakharov, Daniela Pelclova, Tomas Navratil, Jaromir Belacek, Jiri Latta, Michal Pisar, Jan Rulisek, Jiri Leps, Pavel Zidek, Cyril Kucera, Robert Bocek, Miroslav Mazur, Zdenek Belik, Josef Chalupa, Viktor Talafa, Kamil Kodras, Daniel Nalos, Ctirad Sedlak, Michal Senkyrik, Jan Smid, Tomas Salek, Darren M Roberts, Knut Erik Hovda
CONTEXT: Acidemia is a marker of prognosis in methanol poisoning, as well as compounding formate-induced cytotoxicity. Prompt correction of acidemia is a key treatment of methanol toxicity and methods to optimize this are poorly defined. OBJECTIVE: We studied the efficiency of acidemia correction by intermittent hemodialysis (IHD) and continuous renal replacement therapy (CRRT) in a mass outbreak of methanol poisoning. METHODS: The study was designed as observational cohort study...
November 7, 2016: Clinical Toxicology
Chaoqun Wu, Linghao Liu, Kai Tang, Tao Chen
Direct methanol fuel cell (DMFC) is promising as an energy conversion device for the replacement of conventional chemical cell in future, owing to its convenient fuel storage, high energy density and low working temperature. The development of DMFC technology is currently limited by catalyst poison and methanol crossover. To alleviate the methanol crossover, a novel fuel supply system based on ultrasonic atomization is proposed. Experimental investigations on this fuel supply system to evaluate methanol permeation rates, open circuit voltages (OCVs) and polarization curves under a series of conditions have been carried out and reported in this paper...
January 2017: Ultrasonics Sonochemistry
Dong-Mei Liu, Shu Zhou, Jie-Min Chen, Shu-Ya Peng, Wen-Tao Xia
UNLABELLED: Objective. To explore the potential effects of methanol and its metabolite, formic acid, on rat retina function. Methods. Sprague-Dawley rats were divided into 3- and 7-day groups and a control. Experimental groups were given methanol and the control group were provided saline by gavage. Retinal function of each group was assessed by electroretinogram. Concentrations of methanol and formic acid were detected by GC/HS and HPLC, respectively. Results. The a and b amplitudes of methanol treated groups decreased and latent periods delayed in scotopic and photopic ERG recordings...
2016: Journal of Ophthalmology
Xiaotao Yuan, Xin Wang, Xiangye Liu, Hongxin Ge, Guoheng Yin, Chenlong Dong, Fuqiang Huang
One-dimensional nanocrystals favoring efficient charge transfer have attracted enormous attentions, and conductive nanobelts of black titania with a unique band structure and high electrical conductivity would be interestingly used in electrocatalysis. Here, Pd nanodots supported by two kinds of black titania, the oxygen-deficient titania (TiO2-x) and nitrogen-doped titania (TiO2-x:N), were synthesized as efficient composite catalysts for oxygen-reduction reaction (ORR). These composite catalysts show improved catalytic activity with lower overpotential and higher limited current, compared to the Pd nanodots supported on the white titania (Pd/TiO2)...
October 4, 2016: ACS Applied Materials & Interfaces
Lukas Bündgens, Frank Tacke, Christian Trautwein, Alexander Koch
Poisoning with impaired mental state is a frequent cause for hospital admission. The initial management includes assessment of vital functions and airway management followed by focussed diagnostics. Poison Emergency Centers can provide valuable assistance in acute intoxications. Clinically important agents causing mental state alterations include opiates, benzodiazepines, tricyclic antidepressants, alcohol, methanol and ethylene glycol, carbon monoxide and salicylates. Most important therapeutic measures comprise supportive care, decontamination or elimination...
September 2016: Deutsche Medizinische Wochenschrift
Maryam Naseri, Lida Fotouhi, Ali Ehsani, Hamid Mohammad Shiri
In this work, we presented facile route for fabrication of poly ortho aminophenol (POAP) POAP and POAP/ZnO nanocomposite on the surface of the working electrode. The fractal dimension of nanocomposite films in the presence of counter ions was investigated. Surface morphology of the composite film was studied by surface microscopy techniques (SEM). The presence of ZnO in the films was confirmed by EDS analysis. The results indicate that a strong interaction exist at the interface of POAP and nano-ZnO. Different electrochemical methods including galvanostatic charge discharge experiments and cyclic voltammetry have been applied to study the system performance...
December 15, 2016: Journal of Colloid and Interface Science
Daniela Pelclová, Sergey Zakharov
UNLABELLED: Methanol mass poisoning occurs across the world quite frequently, but the complete clinical and laboratory data of the patients are only rarely available. Approximately 138 cases of poisoning were documented in the Czech Republic, 107 patients were hospitalized. Another 31 persons died out of hospital. About 60 % of the hospitalized patients survived intoxication without consequences, one half of the remaining 40 % died and the other half survived with the CNS and/or sight impaired...
2016: Vnitr̆ní Lékar̆ství
V K P Paliwal, R Uniyal, A Azim, Z Neyaz, S N M Muzaffar, A K Baronia
No abstract text is available yet for this article.
September 2016: Anaesthesia and Intensive Care
Paulius Ciegis, Andrejus Zevzikovas, Augusta Zevzikoviene, Palma Nenortiene, Daiva Kazlauskiene
The increasing drug consumption in Lithuania and all over the world makes us think about the negative consequences - the risk of toxicity. Fast and accurate identification of material that caused the poisoning reduces the probability in death cases and makes easier to determine the main cause of death. The results have shown that the most appropriate systems of solvents for qualitative analysis by TLC method of the mixture consisting of alprazolam, codeine and paracetanol are: system "D" (trichloromethane : acetone : conc...
May 2016: Acta Poloniae Pharmaceutica
P F Zabrodskii, V V Maslyakov, M S Gromov
It was established in experiments on noninbred albino rats that the acute intoxication with methanol (1.0 LD50) decreased cellular and humoral immune responses, Th2-lymphocyte activity (to a greater extent as compared to the function of Th1 cells), reduced the blood concentration of immunoregulatory (IFN-g, IL-2, IL-4) and proinflammatory (TNF, IL-1b, IL-6) cytokines on the average by 36.5% (p < 0.05), and did not affect the content of anti-inflammatory cytokines (IL-10, IL-13). Methanol antidote 4-methylpyrazole (non-competitive inhibitor of alcohol dehydrogenase) administered upon acute intoxication with methanol at a dose of 1...
2016: Eksperimental'naia i Klinicheskaia Farmakologiia
Yunus Yildiz, Esma Erken, Handan Pamuk, Hakan Sert, Fatih Sen
Herein, monodisperse platinum (0) nanocatalyst assembled on reduced graphene oxide (Pt(0)@RGO) was easily and reproducibly prepared by the double solvent reduction method at room temperature. Pt(0)@RGO was characterized by X-ray diffraction (XRD), X-ray photoelectron microscopy (XPS) and transmission electron microscopy (TEM) measurements that verify the formation of monodisperse Pt (0) nanoparticles on RGO. The catalytic and electrocatalytic performances of Pt(0) @ RGO in terms of activity, isolability and reusability were investigated for both methanol oxidation and the dehydrocoupling of dimethylamine-borane (DMAB) in which Pt(0)@RGO was found to be highly active and reusable heterogeneous catalyst even at room temperature...
June 2016: Journal of Nanoscience and Nanotechnology
Moonhee Jang, Wonkyung Yang, Sujin Jeong, Sohyung Park, Jihyun Kim
Paramethoxyamphetamine (PMA) is a phenethylamine derivative that is structurally related to 3,4-methylenedioxymethamphetamine (MDMA), but has higher toxicity than MDMA. Here, we report a fatal intoxication case involving PMA. A 36-year-old man was found dead in a hotel room. Toxicological analysis revealed that PMA concentrations were 0.57 and 0.59mg/L in peripheral and heart blood, respectively. Ketamine and diazepam were also detected in his blood. Based on toxicological results and autopsy findings, the cause of death was determined to be acute fatal intoxication with PMA...
September 2016: Forensic Science International
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