PubMed Journals Articles About "NITROUS OXIDE" RSS

21:02 EST 20th February 2020 | BioPortfolio

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Showing "NITROUS OXIDE" PubMed Articles 1–25 of 2,500+

George Washington Frost Mellen and Resuscitation with Nitrous Oxide in 1847.

In The Boston Medical and Surgical Journal of 1847 (later to be called The New England Journal of Medicine), Boston chemist George Washington Frost Mellen claimed that inhaled nitrous oxide gas supports human life in the manner of oxygen gas, and he proposed the use of nitrous oxide in resuscitation from drowning and from carbon monoxide poisoning. The claim was reprinted in at least one dental journal and was long cited as justification for the use of 100% nitrous oxide for inhaled anesthesia. Advocates in...

Source-level Cortical Power Changes for Xenon and Nitrous Oxide-induced Reductions in Consciousness in Healthy Male Volunteers.

Xenon and nitrous oxide are high-affinity N-methyl-D-aspartate receptor antagonistsStepwise comparison between the dose-dependent effects of xenon and nitrous oxide on cortical spectral power has not been previously reportedElectroencephalography and magnetoencephalography imaging are complementary, and their combination leads to high resolution recording of neural activity WHAT THIS ARTICLE TELLS US THAT IS NEW: Magnetoencephalography and electroencephalography recordings at increasing equivalent dose of x...

James M. Osgood: An Inventor Behind Sprague's "Self-Watching" Apparatus for G.Q. Colton's Revival of Nitrous-Oxide Anesthesia.

Inventor J.M. Osgood enabled a fellow Massachusetts inventor, A.W. Sprague, to manufacture heat-regulated nitrous-oxide generators. These generators assisted New Yorker G.Q. Colton in opening exodontia franchises nationwide which revived the use of nitrous-oxide anesthesia.

Acute cognitive disorder as the initial manifestation of nitrous oxide abusing: a case report.

Nitrous oxide (NO) is a colorless, odorless gas used as an anesthetic and analgesic. It is also abused as a recreational drug, and such abuse is associated with neurological disorders and psychiatric complications such as myelopathy and, rarely, cognitive impairment. Its abuse has not been associated with acute cognitive decline. Here, we report a young girl who presented with acute cognitive impairment after excessive recreational inhalation of nitrous oxide and who recovered completely after vitamin B sup...

Divine's CO Absorber of 1867.

Chemist and inventor Silas R. Divine (1838-1912) sold ammonium nitrate and other anesthesia supplies in New York City. He offered a carbon dioxide absorber for the purpose of rebreathing nitrous oxide. Like his colleague Gardner Q. Colton, he denied the need for nitrous oxide to be supplemented with O gas.

Forecasting Nitrous Oxide emissions based on grey system models.

Accurate forecasting is required to measure future national energy performance levels in order to establish clear policies for both monitoring and reducing Nitrous Oxide and other harmful emissions. Using the well-established and accepted measures, we predict the Nitrous Oxide emissions for the year 2030 based on actual data from the years 2000 to 2016 for six countries responsible for 61% of global emissions (China, Indonesia, India, Japan, Russia and the USA). Three advanced mathematical grey predictions ...

Comparison of Three Anxiety Management Protocols for Extraction of Third Molars With the Use of Midazolam, Diazepam, and Nitrous Oxide: A Randomized Clinical Trial.

The objective of the present study was to compare 3 sedation protocols using diazepam, midazolam, and nitrous oxide.

Rhodium(I) Pincer Complexes of Nitrous Oxide.

The synthesis of two well-defined rhodium(I) complexes of nitrous oxide (N O) is reported. These normally elusive adducts are stable in the solid state and persist in solution at ambient temperature, enabling comprehensive structural interrogation by N NMR and IR spectroscopy, and single-crystal X-ray diffraction. These methods evidence coordination of N O through the terminal nitrogen atom in a linear fashion and are supplemented by a computational energy decomposition analysis, which provides further ins...

Effectiveness of nitrous oxide in external cephalic version on success rate: a randomized controlled trial.

Approximately 4% of singleton pregnancies at term are in breech presentation. External cephalic version (ECV) can reduce the risks of noncephalic birth and cesarean delivery, but this maneuver can be painful. Our aim was to analyze the effect of administering inhaled nitrous oxide for analgesia on the ECV success rate.

Festive use of nitrous oxide: major risks !

Nitrous oxide is increasingly consumed during parties for its euphoric properties. But unfortunately, in several cases it leads to real addictions. Unfortunately because its use leads to neurological, psychiatric, pulmonary and even death -by hypoxia-. It is important that the medical community be informed. It is important that the medical community be informed that in the face of atypical and poorly explained disorders doctors may think about the use of laughing gas, especially among young students.

Psychiatric and Other Medical Manifestations of Nitrous Oxide Abuse: Implications From Case Series.

Nitrous oxide (N2O), a commonly used anesthetic agent in dentistry, has emerged as a global public health threat in young population. Although N2O-related neurological sequelae such as spinal cord degeneration and sensorimotor peripheral neuropathy are well known, psychiatric manifestations of heavy N2O use remain unclear. Here, we presented 7 treatment-seeking patients with severe N2O use disorder to delineate the psychiatric profiles of N2O users in Asia.

Oxygen regulates nitrous oxide production directly in agricultural soils.

Oxygen (O) plays a critical and yet poorly understood role in regulating nitrous oxide (NO) production in well-structured agricultural soils. We investigated the effects of O dynamics on NO production in a typical intensively managed Chinese cropping system under a range of environmental conditions (temperature, moisture, ammonium, nitrate, dissolved organic carbon etc.). Climate and management (fertilization, irrigation, precipitation and temperature), and their interactions significantly affected soil O ...

Mechanisms of nitrous oxide emission during photoelectrotrophic denitrification by self-photosensitized Thiobacillus denitrificans.

Photoelectrotrophic denitrification (PEDeN) using bio-hybrids has the potential to remove nitrate (NO) from wastewater in an economical and sustainable way. As a gas of global concern, the mechanisms of nitrous oxide (NO) emissions during this novel process remain unclear. Herein, a self-photosensitized bio-hybrid, i. e., Thiobacillus denitrificans-cadmium sulfide, was constructed and the factors affecting NO emissions during PEDeN by the bio-hybrids were investigated. The system was sensitive to the input ...

Role of sludge retention time in mitigation of nitrous oxide emission from a pilot-scale oxidation ditch.

Nitrous oxide (NO) emission from wastewater treatment plants (WWTPs) has become a focus of attention due to its significant greenhouse effect. In this study, the role of sludge retention time (SRT) in mitigation of NO emission from a pilot-scale oxidation ditch was systematically investigated. The activated sludge system that operated at SRT of 25 days demonstrated significantly lower NO emission factor, higher resistance to ammonia overload and aeration failure shock than those obtained at SRT of 15 da...

Thiosulfate-driven autotrophic and mixotrophic denitrification processes for secondary effluent treatment: Reducing sulfate production and nitrous oxide emission.

Three ecological floating beds (EFBs) with different additional electron donors including sodium thiosulfate, mixed electron donors of sodium thiosulfate and sodium acetate and without additional electron donors were established to compare the differences of nitrogen removal efficiency, nitrous oxide emission, microbial community and functional gene between autotrophic and mixotrophic denitrification. Results showed denitrification efficiency was nearly 100% in both autotrophic and mixotrophic process when ...

Nitrous oxide anesthetic versus total intravenous anesthesia for functional endoscopic sinus surgery.

Functional endoscopic sinus surgery is a common procedure for sinonasal disease, frequently performed in the outpatient setting. General anesthesia maintained with total intravenous anesthesia (TIVA) with propofol has been shown to give superior surgical conditions compared to inhaled anesthetics. This study evaluated the effects of TIVA versus a predominantly nitrous oxide (N O)-based anesthetic with a low-dose propofol and remifentanil infusion on sinus surgery.

Dr. Frank A. Shattuck's Unfolding "Specialty, the Administration of Nitrous Oxide Gas".

Forest streams are important sources for nitrous oxide emissions.

Streams and river networks are increasingly recognized as significant sources for the greenhouse gas nitrous oxide (N O). Nitrous oxide is a transformation product of nitrogenous compounds in soil, sediment and water. Agricultural areas are considered a particular hotspot for emissions because of the large input of nitrogen fertilizers applied on arable land. However, there is little information on N O emissions from forest streams although they constitute a major part of the total stream network globally. ...

The Appearance and Disappearance of Dr. Edwin J. Thompson, Lynn's Celebrated Administrator of Nitrous Oxide.

Subacute Combined Degeneration from Nitrous Oxide Abuse.

Multifocal Nitrous Oxide Cryoballoon Ablation for High-Grade Anal Intraepithelial Neoplasia.

Diffusive flux of CH and NO from agricultural river networks: Regression tree and importance analysis.

River networks in subtropical agricultural hilly region become an inconvenient greenhouse gas (GHG, methane and nitrous oxide) source because of the influence of human activities, which has caused large uncertainties for refinement of national GHG inventories and their global budget. Based on field monitoring experiments at high temporal resolution, we employed regression tree and importance analysis to identify quantitatively factors that influence the diffusive flux of GHGs to provide a scientific basis f...

Methane and nitrous oxide porewater concentrations and surface fluxes of a regulated river.

Greenhouse gas (GHG) emissions from rivers are a critical missing component of current global GHG models. Their exclusion is mainly due to a lack of in-situ measurements and a poor understanding of the spatiotemporal dynamics of GHG production and emissions, which prevents optimal model parametrization. We combined simultaneous observations of porewater concentrations along different beach positions and depths, and surface fluxes of methane and nitrous oxide at a plot scale in a large regulated river during...

Reducing nitrous oxide emission in a sequencing batch reactor operated as static/aerobic/anoxic (SOA) process.

The static/aerobic/anoxic (SOA) activated sludge process was implemented to investigate the nitrous oxide (NO) emission characteristics with the conventional anaerobic/anoxic/oxic (A/O) process as a control group. Although the SOA process can achieve substantial biological nutrient removal (BNR), its NO emission was increased compared with the traditional A/O process. The improvement of the SOA process was carried out by shortening the static time from 60 min to 15 min. SOA with 30-min static time had a...

How does high C load affect nitrous oxide emission of subsurface wastewater infiltration system?

Subsurface wastewater infiltration systems (SWISs) have drawn much attention due to the lower operating costs, lower energy demands and absence of secondary pollutants requiring further treatment. The process of denitrification involves reduction of nitrate to nitrous oxide (NO) and dinitrogen gas (N). Though removal of nitrate is advantageous from a water quality perspective, NO may contribute to adverse environmental effects. This study evaluated NO emission at high C loading regimes. The results revealed...

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