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Methanol poisoning

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https://www.readbyqxmd.com/read/29427181/toxic-alcohol-diagnosis-and-management-an-emergency-medicine-review
#1
REVIEW
Patrick Chow Yuen Ng, Brit J Long, William Tyler Davis, Daniel J Sessions, Alex Koyfman
Toxic alcohols are a group of substances containing a hydroxyl group not meant to be ingested. They are the cause of a significant number of accidental and non-accidental exposures. Toxic alcohol poisoning can be associated with a significant degree of morbidity and mortality if not promptly recognized and treated. This review describes the clinical presentation and an approach to the recognition and management for toxic alcohol poisoning. Toxic alcohols classically refer to a group of alcohols not meant for ingestion...
February 9, 2018: Internal and Emergency Medicine
https://www.readbyqxmd.com/read/29424846/probing-the-surface-fine-structure-through-electrochemical-oscillations
#2
B A F Previdello, P S Fernández, G Tremiliosi-Filho, H Varela
In the course of (electro)catalytic reactions, reversible and irreversible changes, namely the formation of adsorbed poisons, catalyst degradation, surface roughening, etc., take place at distinct time-scales. Reading the transformations on the catalyst surface from the measurement of the reaction rates is greatly desirable but generally not feasible. Herein, we study the effect of random surface defects on Pt(100) electrodes toward the electro-oxidation of methanol in acidic media. The surface defects are gently generated in situ and their relative magnitudes are reproducibly controlled...
February 9, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29343296/quantitative-method-for-analysis-of-six-anticoagulant-rodenticides-in-faeces-applied-in-a-case-with-repeated-samples-from-a-dog
#3
Kristin Opdal Seljetun, Elin Eliassen, Ritva Karinen, Lars Moe, Vigdis Vindenes
BACKGROUND: Accidental poisoning with anticoagulant rodenticides is not uncommon in dogs, but few reports of the elimination kinetics and half-lives in this species have been published. Our objectives were to develop and validate a new method for the quantification of anticoagulant rodenticides in canine blood and faeces using reversed phase ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) and apply the method on a case of anticoagulant rodenticide intoxication...
January 17, 2018: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/29340403/triangular-agau-pt-core-shell-nanoframes-with-a-dendritic-pt-shell-and-enhanced-electrocatalytic-performance-toward-the-methanol-oxidation-reaction
#4
Xiaoxiao Yan, Sijia Yu, Yawen Tang, Dongmei Sun, Lin Xu, Can Xue
Triangular AgAu@Pt nanoframes with a dendritic Pt shell were synthesized by employing Ag nanoprisms as sacrificial templates. Due to the unique frame-like nanostructure and ternary components, the AgAu@Pt nanoframes exhibit impressive electrocatalytic performance toward the methanol oxidation reaction with much higher activity, and better anti-poisoning capability than commercial Pt/C catalysts.
January 17, 2018: Nanoscale
https://www.readbyqxmd.com/read/29327513/methanol-water-aqueous-phase-reforming-by-the-assistant-of-dehydrogenases-at-near-room-temperature
#5
Yangbin Shen, Yulu Zhan, Shuping Li, Fandi Ning, Ying Du, Yunjie Huang, Ting He, Xiaochun Zhou
As an excellent hydrogen storage medium, methanol has many advantages, such as high hydrogen content (12.6 wt%), low-cost and availability from biomass or photocatalysis. However, conventional methanol-water reforming usually proceeds at high temperature. In this research, we successfully designed a new effective strategy to generate hydrogen from methanol at near-room temperature. The strategy involves two main procedures, which are CH3OH→HCOOH→H2 and NADH→HCOOH→H2. The first procedure (CH3OH→HCOOH→H2) is performed by alcohol dehydrogenase (ADH), aldehyde dehydrogenase (ALDH) and the Ir-catalyst...
January 11, 2018: ChemSusChem
https://www.readbyqxmd.com/read/29321805/simultaneous-measurement-of-formic-acid-methanol-and-ethanol-in-vitreous-and-blood-samples-of-postmortem-by-headspace-gc-fid
#6
Hamideh Ghorbani, Alireza Nezami, Behjat Sheikholeslami, Arya Hedjazi, Mahnaz Ahmadimanesh
Background: Formic acid (formate) is the main reason for toxicity and death through methanol poisoning. The simultaneous determination of methanol, ethanol, and formate in the body can help to discover the cause of death and is useful in the diagnosis of acute methanol poisoning. The measurement of formate is not yet available in Iran. With regard to the increasing rate of methanol poisoning and its related mortality in Iran, as well as the main role of formate in methanol poisoning, this study was designed to set up an analytical method for the concurrent determination of ethanol, methanol, and formate...
2018: Journal of Occupational Medicine and Toxicology
https://www.readbyqxmd.com/read/29300238/erythropoietin-in-treatment-of-methanol-optic-neuropathy
#7
Farzad Pakdel, Mostafa S Sanjari, Asieh Naderi, Niloofar Pirmarzdashti, Anousheh Haghighi, Mohsen B Kashkouli
BACKGROUND: Methanol poisoning can cause an optic neuropathy that is usually severe and irreversible and often occurs after ingestion of illicit or homemade alcoholic beverages. In this study, we evaluated the potential neuroprotective effect of erythropoietin (EPO) on visual acuity (VA) in patients with methanol optic neuropathy. METHODS: In a prospective, noncomparative interventional case series, consecutive patients with methanol optic neuropathy after alcoholic beverage ingestion were included...
January 3, 2018: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/29298388/defect-free-encapsulation-of-fe0-in-2d-fused-organic-networks-as-a-durable-oxygen-reduction-electrocatalyst
#8
Seok-Jin Kim, Javeed Mahmood, Changmin Kim, Gao-Feng Han, Seong-Wook Kim, Sun-Min Jung, Guomin Zhu, James J De Yoreo, Guntae Kim, Jong-Beom Baek
Because they provide lower-cost but comparable activity to precious platinum (Pt)-based catalysts, non-precious iron (Fe)-based materials, such as Fe/Fe3C and Fe-N-C, have gained considerable attention as electrocatalysts for the oxygen reduction reaction (ORR). However, their practical application is hindered by their poor stability, which is attributed to the defective protection of extremely unstable Fe nanoparticles. Here, we introduce a synthesis strategy for a stable Fe-based electrocatalyst, which was realized by defect-free encapsulation of Fe nanoparticles using a two-dimensional (2D) phenazine-based fused aromatic porous organic network (Aza-PON)...
January 3, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29283565/shape-control-of-pt-ru-nanocrystals-tuning-surface-structure-for-enhanced-electrocatalytic-methanol-oxidation
#9
Liang Huang, Xueping Zhang, Qingqing Wang, Yujie Han, Youxing Fang, Shaojun Dong
Despite that both electrochemical experiments and density functional theory calculations have testified the superior electrocatalytic activity and CO-poisoning tolerance of platinum-ruthenium (PtRu) alloy nanoparticles toward the methanol oxidation reaction (MOR), the facet-dependent electrocatalytic properties of PtRu nanoparticles are scarcely revealed because it is extremely difficult to synthesize well-defined facets enclosed PtRu nanocrystals. Herein, we for the first report a general synthesis of ultrathin PtRu nanocrystals with tuneable morphologies (nanowires, nanorods and nanocubes) through a one-step solvothermal approach, and systematically investigate the structure-directing effects of different surfactants and the formation mechanism by control experiments and time-dependent studies...
December 28, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29231019/-simultaneous-quantitative-analysis-of-koumine-gelsemine-and-gelsenicine-in-biological-samples-by-lc-ms-ms
#10
S J Ji, W Liu
OBJECTIVES: To establish a LC-MS/MS method which is accurate and sensitive for determination of koumine, gelsemine, and gelsenicine in biological samples and to verify the method. METHODS: Strychnine was used as internal standard. Analytes in blood, urine and liver with 1% sodium hydroxide solution were extracted by ethyl acetate. Chromatographic separation was achieved on a ZORBAX SB-C₁₈ column (150 mm×2.1 mm, 5 μm), and gradient elution was performed with the buffer solution of methanol-20 mmol/L ammonium acetate (including 0...
April 2017: Fa Yi Xue za Zhi
https://www.readbyqxmd.com/read/29214597/fabrication-and-characterization-of-new-composite-tio2-carbon-nanofiber-anodic-catalyst-support-for-direct-methanol-fuel-cell-via-electrospinning-method
#11
N Abdullah, S K Kamarudin, L K Shyuan, N A Karim
Platinum (Pt) is the common catalyst used in a direct methanol fuel cell (DMFC). However, Pt can lead towards catalyst poisoning by carbonaceous species, thus reduces the performance of DMFC. Thus, this study focuses on the fabrication of a new composite TiO2 carbon nanofiber anodic catalyst support for direct methanol fuel cells (DMFCs) via electrospinning technique. The distance between the tip and the collector (DTC) and the flow rate were examined as influencing parameters in the electrospinning technique...
December 6, 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29210340/homicidal-methanol-poisoning-in-filicide-suicide
#12
Asit K Sikary, C Behera
Most methanol poisonings are accidental. We present a rare case of filicide-suicide, where a youth was killed by methanol poisoning and his parents then committed suicide by jumping in front of a running train. The father's suicide note explains the crime.
December 2017: Medico-legal Journal
https://www.readbyqxmd.com/read/29171574/methanol-poisoning-27-years-experience-at-a-tertiary-care-hospital
#13
Fareed Ahmed, Nadeem Ullah Khan, Noman Ali, Asher Feroze
Methanol toxicity can result in serious morbidity and mortality without timely diagnosis and treatment. Many cases of methanol poisoning outbreaks have been noted in our population but no study has been performed to estimate methanol exposure and its outcomes and complications. A retrospective study was conducted to review all the cases of methanol poisoning admitted from January 1988 to December 2015 at the Aga Khan University Hospital. A total of 35 methanol poisoning cases were reported. All the patients were male, and the mean age was 36...
November 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/29107732/the-rapid-determination-of-bromadiolone-in-liver-and-blood-plasma-by-in-injector-pyrolysis-gas-chromatography-ion-trap-tandem-mass-spectrometry
#14
Veronika Doubková, Petr Maršálek, Vladimír Večerek
The unintentional poisoning of off-target animals by bromadiolone, a second generation anticoagulant rodenticide, is an undesirable outcome requiring sensitive analytical methods. In this study, a rapid and sensitive method for the determination of bromadiolone in liver and blood plasma by means of gas chromatography coupled with tandem mass spectrometry without need for derivatization was developed. The method is based on the in-injector pyrolysis of bromadiolone and subsequent gas chromatography coupled with ion trap tandem mass spectrometry with electron ionization...
October 14, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/29096991/intox-detox-antidotes-evidence-based-diagnosis-and-treatment-of-acute-intoxications
#15
Andreas Schaper, Martin Ebbecke
BACKGROUND AND AIM: Aim of this review is to describe the role of clinical toxicology in the context of acute medicine. A special focus is put on antidotes and important aspects of diagnosis and therapy of acute intoxications. The data of the annual report of GIZ-Nord Poisons Centre is analyzed concerning the following aspects: what intoxications are relevant in acute medicine, are there special aspects in therapy, e.g. antidotes, and what antidotes are relevant? More over intoxication-related fatalities are analyzed...
November 2017: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/29091086/trimetallic-ptauni-alloy-nanoparticles-as-an-efficient-electrocatalyst-for-the-methanol-electrooxidation-reaction
#16
Kousik Bhunia, Santimoy Khilari, Debabrata Pradhan
Platinum is an excellent electrocatalyst. However, the disadvantages of Pt as an electrocatalyst lie in its poor earth abundance, high cost, and poor stability due to surface poisoning. Thus it remains a challenge to find suitable alternative electrocatalysts and/or reduce the use of Pt. Herein, we report the solvothermal synthesis of bimetallic (PtAu and PtNi) and trimetallic (PtAuNi) alloy nanoparticles (NPs) with controlled percentages of individual metals. With an optimized Ni content, the trimetallic (Pt66Au11Ni23) alloy NPs show superior electrocatalytic activity (in terms of lower onset oxidation potential and higher mass activity) not only to bimetallic alloy NPs (PtAu and PtNi) but also to commercial Pt/C (20% Pt loading) for methanol electrooxidation (MEO)...
November 14, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29081461/rapid-lc-ms-determination-of-acromelic-acids-a-and-b-toxic-constituents-of-the-mushroom-paralepistopsis-acromelalga
#17
Naoki Yoshioka, Hitoshi Ouchi, Toshiyuki Kan, Masashi Yoshida, Motoyuki Nomura
A rapid LC-MS method was developed for determination of acromelic acids A and B, which are toxic constituents of Paralepistopsis acromelalga (=Clitocybe acromelalga), in mushroom samples. Acromelic acids were extracted twice with 50% methanol and the extract was passed through a syringe filter, and then analyzed by LC-MS. The LC separation was performed on a multi-mode ODS column. The recoveries of acromelic acids A and B spiked into blank mushroom samples at 2.5 μg/g were 93 and 74%, respectively. This method was applied to the remaining mushroom sample from a food poisoning case...
2017: Shokuhin Eiseigaku Zasshi. Journal of the Food Hygienic Society of Japan
https://www.readbyqxmd.com/read/29075689/defective-graphene-anchored-iron-cobalt-nanoparticles-for-efficient-electrocatalytic-oxygen-reduction
#18
Xuecheng Yan, Yi Jia, Longzhou Zhang, Mun Teng Soo, Xiangdong Yao
A non-precious FeCo nanoparticle decorated defective graphene (DG) sample, DG@FeCo, was successfully synthesized via a facile impregnation method. It is shown that DG@FeCo exhibits similar oxygen reduction reaction activity to that of commercial Pt/C, but has much better durability and is free from methanol poisoning in alkaline electrolytes.
November 7, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29055193/specific-bioanalytical-optical-and-photoelectrochemical-assays-for-detection-of-methanol-in-alcoholic-beverages
#19
Javier Barroso, Beatriz Díez-Buitrago, Laura Saa, Marco Möller, Nerea Briz, Valeri Pavlov
Methanol is a poison which is frequently discovered in alcoholic beverages. Innovative methods to detect methanol in alcoholic beverages are being constantly developed. We report for the first time a new strategy for the detection of methanol using fluorescence spectroscopy and photoelectrochemical (PEC) analysis. The analytical system is based on the oxidation of cysteine (CSH) with hydrogen peroxide (H2O2) enzymatically generated by alcohol oxidase (AOx). H2O2 oxidizes capping agent CSH, modulating the growth of CSH-stabilized cadmium sulphide quantum dots (CdS QDs)...
October 13, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29039800/high-ethanol-contents-of-spirit-drinks-in-kibera-slums-kenya-implications-for-public-health
#20
Alex O Okaru, Kennedy O Abuga, Isaac O Kibwage, Dirk W Lachenmeier
Cheap licit and artisanal illicit spirit drinks have been associated with numerous outbreaks of alcohol poisoning especially with methanol. This study aimed to evaluate the quality of cheap spirit drinks in Kibera slums in Nairobi County, Kenya. The samples consisted of cheap licit spirits (n = 11) and the artisanal spirit drink, 'chang'aa', (n = 28). The parameters of alcoholic strength and volatile composition were used as indicators of quality and were determined using gas chromatography with flame ionization detection (GC-FID) and gas chromatography-mass spectrometry (GC-MS) respectively...
October 17, 2017: Foods (Basel, Switzerland)
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