keyword
MENU ▼
Read by QxMD icon Read
search

Nitrous oxide

keyword
https://www.readbyqxmd.com/read/28437304/nitrous-oxide-utility-in-labor-and-birth-a-multipurpose-modality
#1
Michelle Collins
The use of nitrous oxide (N2O) for labor and birth has very recently emerged as a viable modality in the United States, despite a long history of use in Canada and Europe. Usually associated with dental procedures, there are significant differences between dental and parturition utility, efficacy, and staff exposure. In addition to using it for pain relief and anxiolysis, those centers utilizing it have noted it to be multipurpose and useful for such situations as: external cephalic version, manual removal of placenta, intravenous starts, during placement of urinary catheters and intracervical Foley bulbs...
April 2017: Journal of Perinatal & Neonatal Nursing
https://www.readbyqxmd.com/read/28436222/influence-of-nitric-acid-on-the-helium-ion-radiolysis-of-aqueous-butanal-oxime-solutions
#2
Amaury Costagliola, Laurent Venault, Arnaud Deroche, Jackie Vermeulen, Florian Duval, Guillaume Blain, Johan Vandenborre, Massoud Fattahi-Vanani, Nicolas Vigier
Samples of butanal oxime in aqueous nitric acid solutions have been irradiated with the helium ion (4He2+) beam of the CEMHTI (Orléans, France) cyclotrons. The consumption yield of butanal oxime has been measured by gas-chromatography coupled with mass spectrometry. Gaseous products (mainly H2 and N2O) have also been monitored by micro gas-chromatography. Yields of liquid phase products (hydrogen peroxide and nitrous acid) have been determined by colorimetric methods. The influence of nitric acid on the radiation chemical behavior of butanal oxime depends on the nitric acid concentration...
April 24, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28434669/diurnal-variation-of-co2-ch4-and-n2o-emission-fluxes-continuously-monitored-in-situ-in-three-environmental-habitats-in-a-subtropical-estuarine-wetland
#3
Wen-Bin Yang, Chung-Shin Yuan, Chuan Tong, Pin Yang, Lei Yang, Bang-Qin Huang
Wetlands play a crucial role in modulating atmospheric concentrations of greenhouse gases (GHGs) such as carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O). The key factors controlling GHG emission from subtropical estuarine wetlands were investigated in this study, which continuously monitored the uptake/emission of GHGs (CO2, CH4, and N2O) by/from a subtropical estuarine wetland located in the Minjiang estuary in the coastal region of southeastern China. A self-designed floating chamber was used to collect air samples on-site at three environmental habitats (Phragmites australis marsh, mudflats, and river water)...
April 20, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28426987/a-review-on-nitrous-oxide-n2o-emissions-during-biological-nutrient-removal-from-municipal-wastewater-and-sludge-reject-water
#4
REVIEW
Theoni Maria Massara, Simos Malamis, Albert Guisasola, Juan Antonio Baeza, Constantinos Noutsopoulos, Evina Katsou
Nitrous oxide (N2O) is an important pollutant which is emitted during the biological nutrient removal (BNR) processes of wastewater treatment. Since it has a greenhouse effect which is 265 times higher than carbon dioxide, even relatively small amounts can result in a significant carbon footprint. Biological nitrogen (N) removal conventionally occurs with nitrification/denitrification, yet also through advanced processes such as nitritation/denitritation and completely autotrophic N-removal. The microbial pathways leading to the N2O emission include hydroxylamine oxidation and nitrifier denitrification, both activated by ammonia oxidizing bacteria, and heterotrophic denitrification...
April 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28419534/endocrine-imbalance-associated-with-proteome-changes-in-diabetes
#5
Amr A Sayed, Ahmed M Alhawary, Aboalela Farag, Dina R Johar, Larry H Bernstein
The dynamics of cellular metabolism involves rapid interactions between proteins and nucleotides, proteins and proteins, proteins and mRNA, the action of miRNA, and signaling. These also involve the interactions with respect to the sulfur bond, oxygen radicals that initiate a change in conformation and a chain of events. We review a development in molecular medicine that is a very promising work in progress. We also review the current and future research methods involving mitochondria. Long-term effects of diabetes include glycation of proteins, e...
April 17, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28419127/effects-of-nitrogen-application-rate-nitrogen-synergist-and-biochar-on-nitrous-oxide-emissions-from-vegetable-field-in-south-china
#6
Qiong Yi, Shuanghu Tang, Xiaolin Fan, Mu Zhang, Yuwan Pang, Xu Huang, Qiaoyi Huang
Globally, vegetable fields are the primary source of greenhouse gas emissions. A closed-chamber method together with gas chromatography was used to measure the fluxes of nitrous oxide (N2O) emissions in typical vegetable fields planted with four vegetables sequentially over time in the same field: endive, lettuce, cabbage and sweet corn. Results showed that N2O fluxes occurred in pulses with the N2O emission peak varying greatly among the crops. In addition, N2O emissions were linearly associated with the nitrogen (N) application rate (r = 0...
2017: PloS One
https://www.readbyqxmd.com/read/28418969/funding-the-revival-of-nitrous-oxide-anesthesia-publisher-g-q-colton-issues-edward-everett-s-great-issues
#7
(no author information available yet)
No abstract text is available yet for this article.
May 2017: Anesthesiology
https://www.readbyqxmd.com/read/28417893/equipment-safety-maintenance-and-inspection-what-the-oral-surgeon-needs-to-know
#8
REVIEW
Katherine A Keeley
Many oral and maxillofacial surgical procedures are done in an office-based setting, with many oral and maxillofacial surgeons involved in oversight of equipment maintenance. Goals in equipment management are to prevent harm to patients and staff, stay compliant with current regulations, and increase equipment longevity. This article covers the safety, maintenance, and inspection related to electrical equipment used in the treatment of patients, autoclaves, radiograph machines, nitrous oxide and oxygen medical gases, and required back-up power and lighting...
May 2017: Oral and Maxillofacial Surgery Clinics of North America
https://www.readbyqxmd.com/read/28414347/high-resolution-fourier-transform-measurements-of-line-strengths-in-the-00-sup-0-sup-2-00-sup-0-sup-0-main-isotopologue-band-of-nitrous-oxide
#9
Viktor Werwein, Jens Brunzendorf, Gang Li, Anton Serdyukov, Olav Werhahn, Volker Ebert
Nitrous oxide (N<sub>2</sub>O) is a key greenhouse gas and a major ozone-depleting anthropogenic pollutant monitored by the total carbon column observing network (TCCON) in the 00<sup>0</sup>2-00<sup>0</sup>0-band of its main isotopologue. Here, we present highly accurate line strengths for this window determined using Fourier transform infrared spectroscopy with pressure, temperature, and optical path length being metrologically traceable to the SI. The obtained results agree with previous studies within the given uncertainties...
April 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/28412628/4-nitroso-sulfamethoxazole-generation-in-soil-under-denitrifying-conditions-field-observations-versus-laboratory-results
#10
Monica Brienza, Céline Duwig, Sandra Pérez, Serge Chiron
The formation of 4-nitroso-sulfamethoxazole and 4-nitro-SMX, two transformation products (TPs) of sulfamethoxazole (SMX) was investigated under batch soil slurry experiments and in a field study. Due to their low occurrence levels (ng/L) in environmental waters, a suitable analytical method based on liquid chromatography - high resolution - mass spectrometry was developed. Consequently, field observations revealed, for the first time, the occurrence of 4-nitroso-SMX in groundwater at concentrations as high as 18ng/L...
April 7, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28412567/leachate-treatment-in-landfills-is-a-significant-n2o-source
#11
Xiaojun Wang, Mingsheng Jia, Chengliang Zhang, Shaohua Chen, Zucong Cai
The importance of methane (CH4) emissions from landfills has been extensively documented, while the nitrous oxide (N2O) emissions from landfills are considered negligible. In this study, three landfills were selected to measure CH4 and N2O emissions using the static chamber method. Dongbu (DB) and Dongfu (DF) landfills, both located in Xiamen city, Fujian Province, were classified as sanitary. The former started to receive solid waste from Xiamen city in 2009, and the latter was closed in 2009. Nanjing (NJ) landfill, located in Nanjing county, Fujian Province, was classified as managed...
April 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28405070/nitrous-oxide-induced-vitamin-b12-deficiency
#12
Lindsey Stockton, Cameron Simonsen, Susan Seago
Nitrous oxide is a gas that is odorless, colorless, and has a sweet taste at room temperature. Nitrous oxide has several uses, including in surgery and dentistry (referred to as "laughing gas"), in automotive racing, and in aerosol spray propellants. The aerosol spray propellants that typically use nitrous oxide are whipped cream canisters and cooking sprays. Unfortunately, these over-the-counter household items are a source of nitrous oxide that can be used for recreational use. The most popular is the use of industrial-grade canisters having the slang term "whippets...
April 2017: Proceedings of the Baylor University Medical Center
https://www.readbyqxmd.com/read/28402907/strategies-for-enhanced-deammonification-performance-and-reduced-nitrous-oxide-emissions
#13
Carmen Leix, Jörg E Drewes, Liu Ye, Konrad Koch
Deammonification's performance and associated nitrous oxide emissions (N2O) depend on operational conditions. While studies have investigated factors for high performances and low emissions separately, this study investigated optimizing deammonification performance while simultaneously reducing N2O emissions. Using a design of experiment (DoE) method, two models were developed for the prediction of the nitrogen removal rate and N2O emissions during single-stage deammonification considering three operational factors (i...
April 1, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28402635/hydrogenation-and-hydrosilylation-of-nitrous-oxide-homogeneously-catalyzed-by-a-metal-complex
#14
Rong Zeng, Moran Feller, Yehoshoa Ben-David, David Milstein
Due to its significant contribution to stratospheric ozone depletion and its potent greenhouse effect, nitrous oxide has stimulated much research interest regarding its reactivity modes and its transformations, which can lead to its abatement. We report the homogeneously catalyzed reaction of nitrous oxide (N2O) with H2. The reaction is catalyzed by a PNP pincer ruthenium complex, generating efficiently only dinitrogen and water, under mild conditions, thus providing a green, mild methodology for removal of nitrous oxide...
April 12, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28400580/responses-of-denitrifying-bacterial-communities-to-short-term-waterlogging-of-soils
#15
Yong Wang, Yoshitaka Uchida, Yumi Shimomura, Hiroko Akiyama, Masahito Hayatsu
Agricultural soil is often subjected to waterlogging after heavy rainfalls, resulting in sharp and explosive increases in the emission of nitrous oxide (N2O), an important greenhouse gas primarily released from agricultural soil ecosystems. Previous studies on waterlogged soil examined the abundance of denitrifiers but not the composition of denitrifier communities in soil. Also, the PCR primers used in those studies could only detect partial groups of denitrifiers. Here, we performed pyrosequencing analyses with the aid of recently developed PCR primers exhibiting high coverage for three denitrification genes, nirK, nirS, and nosZ to examine the effect of short-term waterlogging on denitrifier communities in soil...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28400514/role-of-surface-and-subsurface-processes-in-scaling-n2o-emissions-along-riverine-networks
#16
Alessandra Marzadri, Martha M Dee, Daniele Tonina, Alberto Bellin, Jennifer L Tank
Riverine environments, such as streams and rivers, have been reported as sources of the potent greenhouse gas nitrous oxide ([Formula: see text]) to the atmosphere mainly via microbially mediated denitrification. Our limited understanding of the relative roles of the near-surface streambed sediment (hyporheic zone), benthic, and water column zones in controlling [Formula: see text] production precludes predictions of [Formula: see text] emissions along riverine networks. Here, we analyze [Formula: see text] emissions from streams and rivers worldwide of different sizes, morphology, land cover, biomes, and climatic conditions...
April 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28396691/nasal-nitric-oxide-in-allergic-rhinitis-in-children-and-its-relationship-to-severity-and-treatment
#17
Peng-Peng Wang, Gui-Xiang Wang, Wen-Tong Ge, Li-Xing Tang, Jie Zhang, Xin Ni
BACKGROUND: Nasal nitrous oxide (nNO) is increased in allergic rhinitis (AR), but not in asthma, and is a non-invasive marker for inflammation in the nasal passages. METHODS: Levels of nNO were measured and compared in healthy children and children with mild and moderate-to-severe AR. Levels of nNO before and after treatment with steroids and/or antihistamine were then compared in the 2 AR groups. Their relationship to quality of life and nasal symptom and reactivity to outdoor and outdoor allergens were examined...
2017: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/28394993/revisiting-the-link-between-precipitation-and-the-risk-of-autism-the-role-of-environmental-nitrous-oxide-exposure
#18
Keith Fluegge
No abstract text is available yet for this article.
April 10, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/28391944/effects-of-exogenous-short-chain-n-acyl-homoserine-lactone-on-denitrifying-process-of-paracoccus-denitrificans
#19
Yun Cheng, Yang Zhang, Qiuxuan Shen, Jie Gao, Guoqiang Zhuang, Xuliang Zhuang
N-acyl-homoserine lactones (AHLs) serve as quorum-sensing signals, which control a number of bacterial processes in many proteobacteria. Here we report the effects of exogenous short-chain AHL on the denitrifying process of Paracoccus denitrificans, which are capable of aerobic and anaerobic growth by utilizing nitrate. The denitrification activity of these cells was monitored by measuring denitrification products (including nitrate, nitrite, and nitrous oxide), and the individual messenger ribonucleic acid (mRNA) levels of nitrate, nitrite, nitric oxide and nitrous oxide reductases...
April 2017: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/28391098/carbon-footprint-of-urban-source-separation-for-nutrient-recovery
#20
H Kjerstadius, A Bernstad Saraiva, J Spångberg, Å Davidsson
Source separation systems for the management of domestic wastewater and food waste has been suggested as more sustainable sanitation systems for urban areas. The present study used an attributional life cycle assessment to investigate the carbon footprint and potential for nutrient recovery of two sanitation systems for a hypothetical urban area in Southern Sweden. The systems represented a typical Swedish conventional system and a possible source separation system with increased nutrient recovery. The assessment included the management chain from household collection, transport, treatment and final return of nutrients to agriculture or disposal of the residuals...
April 6, 2017: Journal of Environmental Management
keyword
keyword
9979
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"