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Nitrous oxide

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https://www.readbyqxmd.com/read/28633114/do-glucosinolate-hydrolysis-products-reduce-nitrous-oxide-emissions-from-urine-affected-soil
#1
S F Balvert, J Luo, L A Schipper
New Zealand agriculture is predominantly comprised of pastoral grazing systems and deposition of animal excreta during grazing has been identified as a major source of nitrous oxide (N2O) emissions. Nitrification inhibitors have been shown to significantly reduce nitrous oxide emissions from grazing pastoral systems, and some plants have been identified as having nitrification inhibiting properties. Brassica crops are one such example as they contain the secondary metabolite glucosinolate (GLS) whose hydrolysis products are thought to slow soil nitrogen cycling...
June 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28632629/evaluation-of-nitrous-oxide-in-the-gas-mixture-for-anesthesia-ii-enigma-ii-revisited-patients-still-vomiting
#2
Edmond C K Li, Lloyd D Balbuena, Jonathan J Gamble
No abstract text is available yet for this article.
July 2017: Anesthesiology
https://www.readbyqxmd.com/read/28631111/suffocation-caused-by-plastic-wrap-covering-the-face-combined-with-nitrous-oxide-inhalation
#3
Peter Mygind Leth, Birgitte Schmidt Astrup
Suicide using a combination of a plastic bag over the head and inhalation of a non-irritating gas, such as helium, argon or nitrogen, has been reported in the literature. Here an unusual suicide method in a 17-year old man by suffocation from covering the face with household plastic wrap, combined with nitrous oxide inhalation, is presented. The case was reviewed based on police, autopsy and hospital reports. A PubMed search for scientific literature related to nitrous oxide abuse and suicide by suffocation was performed and our findings discussed in relation to the scientific literature found...
June 19, 2017: Forensic Science, Medicine, and Pathology
https://www.readbyqxmd.com/read/28629738/nitrous-oxide-versus-oral-sedation-for-pain-management-of-first-trimester-surgical-abortion-a-randomized-study
#4
Rameet H Singh, Maria Montoya, Eve Espey, Lawrence Leeman
OBJECTIVES: To compare nitrous oxide with oxygen (N2O/O2) to oral hydrocodone/acetaminophen and lorazepam (oral) for analgesia during first-trimester surgical abortion. STUDY DESIGN: This double-blind randomized trial assigned women undergoing first-trimester surgical abortion at<11weeks' gestation to inhaled N2O/O2 vs. oral sedation for pain management. The N2O/O2 group received up to 70:30 ratio during the procedure and placebo pills pre-procedure; the oral group received inhaled oxygen during the procedure and oral hydrocodone/acetaminophen 5mg/325mg and lorazepam 1mg pre-procedure...
June 16, 2017: Contraception
https://www.readbyqxmd.com/read/28629495/noviherbaspirillum-denitrificans-sp-nov-a-denitrifying-bacterium-isolated-from-rice-paddy-soil-and-noviherbaspirillum-autotrophicum-sp-nov-a-denitrifying-facultatively-autotrophic-bacterium-isolated-from-rice-paddy-soil-and-proposal-to-reclassify-herbaspirillum
#5
Satoshi Ishii, Naoaki Ashida, Hiroki Ohno, Takahiro Segawa, Shuhei Yabe, Shigeto Otsuka, Akira Yokota, Keishi Senoo
Thirty-nine denitrifying bacterial strains closely related to one another, represented by strains TSA40T and TSA66T, were isolated from rice paddy soils. Strains TSA40T and TSA66T were Gram-stain-negative, slightly curved rod-shaped, and motile by means of polar flagella. They were able to reduce nitrate, nitrite and nitrous oxide, but unable to fix atmospheric N2. While strain TSA66T was able to grow autotrophically by H2-dependent denitrification, strain TSA40T could not. Phylogenetic analysis suggested that they belong to the family Oxalobacteraceae, the order Burkholderiales in the class Betaproteobacteria...
June 20, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28625444/nitrous-oxide-for-labor-analgesia-utilization-and-predictors-of-conversion-to-neuraxial-analgesia
#6
Caitlin D Sutton, Alexander J Butwick, Edward T Riley, Brendan Carvalho
STUDY OBJECTIVE: We examined the characteristics of women who choose nitrous oxide for labor analgesia and identified factors that predict conversion from nitrous oxide to labor neuraxial analgesia. DESIGN: Retrospective descriptive study. SETTING: Labor and Delivery Ward. PATIENTS: 146 pregnant women who used nitrous oxide for analgesia during labor and delivery between September 2014 and September 2015. INTERVENTIONS: Chart review only...
August 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28624728/nitrite-production-from-urine-for-sulfide-control-in-sewers
#7
Min Zheng, Zhiqiang Zuo, Yizhen Zhang, Yujia Cui, Qian Dong, Yanchen Liu, Xia Huang, Zhiguo Yuan
Most commonly used methods for sewer sulfide control involves dosing chemical agents to wastewater, which incurs high operational costs. Here, we propose and demonstrate a cost-effective and environmentally attractive approach to sewer sulfide control through urine separation and its subsequent conversion to nitrite prior to intermittent dosage to sewers. Urine collected from a male toilet urinal was fed to laboratory-scale sequencing batch reactors. The reactors stably converted roughly 50% of the nitrogen in urine to nitrite, with high abundance (at 17...
May 23, 2017: Water Research
https://www.readbyqxmd.com/read/28611409/soil-biochar-amendment-affects-the-diversity-of-nosz-transcripts-implications-for-n2o-formation
#8
Johannes Harter, Mohamed El-Hadidi, Daniel H Huson, Andreas Kappler, Sebastian Behrens
Microbial nitrogen transformation processes such as denitrification represent major sources of the potent greenhouse gas nitrous oxide (N2O). Soil biochar amendment has been shown to significantly decrease N2O emissions in various soils. However, the effect of biochar on the structure and function of microbial communities that actively perform nitrogen redox transformations has not been studied in detail yet. To analyse the community composition of actively denitrifying and N2O-reducing microbial communities, we collected RNA samples at different time points from a soil microcosm experiment conducted under denitrifying conditions and performed Illumina amplicon sequencing targeting nirK, typical nosZ and atypical nosZ mRNA transcripts...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28609184/use-of-gases-in-dairy-manufacturing-a-review
#9
Bhaskar Mani Adhikari, Tuyen Truong, Nidhi Bansal, Bhesh Bhandari
Use of gases (air, carbon dioxide and nitrogen) has been practiced in the manufacture of dairy products (i.e. ice cream, whipped cream and butter) to improve their texture, mouthfeel and shelf-life extension. Many attempts have also been made to incorporate other gases such as hydrogen, nitrous oxide, argon, xenon, and helium into the dairy systems for various product functionalities such as whipping, foaming, texture, aroma enhancement and therapeutic properties. The gases can be dissolved in aqueous and fat phases or remain in the form of bubbles stabilised by protein or fat particles...
June 13, 2017: Critical Reviews in Food Science and Nutrition
https://www.readbyqxmd.com/read/28606652/rocuronium-versus-suxamethonium-for-rapid-sequence-induction-of-general-anaesthesia-for-caesarean-section-influence-on-neonatal-outcomes
#10
M Kosinova, P Stourac, M Adamus, D Seidlova, T Pavlik, P Janku, I Krikava, Z Mrozek, M Prochazka, J Klucka, R Stoudek, I Bartikova, H Harazim, H Robotkova, K Hejduk, Z Hodicka, M Kirchnerova, J Francakova, L Obare Pyszkova, J Hlozkova, P Sevcik
BACKGROUND: In a previous study we compared rocuronium and suxamethonium for rapid-sequence induction of general anaesthesia for caesarean section and found no difference in maternal outcome. There was however, a significant difference in Apgar scores. As this was a secondary outcome, we extended the study to explore this finding on a larger sample. METHODS: We included 488 parturients of whom 240 were women from the original study. Women were randomly assigned to receive either rocuronium 1mg/kg (ROC n=245) or suxamethonium 1mg/kg (SUX n=243) after propofol 2mg/kg...
May 10, 2017: International Journal of Obstetric Anesthesia
https://www.readbyqxmd.com/read/28604098/nitrous-oxide-and-midazolam-sedation-a-systematic-review-and-meta-analysis
#11
Gowri Sivaramakrishnan, Kannan Sridharan
Nitrous oxide and midazolam have been used as sedative agents to decrease fear and anxiety associated with dental procedures. Although these agents have been widely used individually, the combination of the two is also commonly used. Four clinical trials were identified that compared the combination technique with the individual use of the drugs. The standardized mean difference (SMD) for each outcome measure was considered for final analysis. Three studies with 534 participants were included in the final meta-analysis, and the SMD [95% CI] was obtained as -0...
2017: Anesthesia Progress
https://www.readbyqxmd.com/read/28603910/production-of-n2-and-n2-o-from-nitrate-ingested-by-sheep
#12
V de Raphélis-Soissan, J V Nolan, I R Godwin, J R Newbold, B D Eyre, D V Erler, R S Hegarty
Supplementing ruminants with nitrate (NO3-) reduces their enteric methane (CH4 ) emissions; however, the greenhouse gas (GHG) mitigation achieved can be partially offset by small emissions of nitrous oxide (N2 O), a more potent GHG. Sheep were dosed intraruminally with (15) NO3- to investigate whether dietary NO3- is a precursor of N2 O and/or di-nitrogen gas (N2 ), and to quantify the amounts of NO3- recovered as N2 O and N2 in gas emissions from sheep adapted or not adapted to dietary NO3-. Ruminally cannulated sheep were adapted to a hay diet supplemented with NO3- (n = 3; 10 g NO3-/kg DM) or urea (n = 3; 5...
June 12, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28602971/new-developments-in-hepatorenal-syndrome
#13
Ayse L Mindikoglu, Stephen C Pappas
Hepatorenal Syndrome (HRS) continues to be one of the major complications of decompensated cirrhosis leading to death in the absence of liver transplantation. Challenges in precisely evaluating renal function in the patient with cirrhosis remain due to the limitations of serum creatinine (Cr) alone in estimating glomerular filtration rate (GFR); current GFR estimating models appear to underestimate renal function. Newer models incorporating renal biomarkers, such as the Cr-Cystatin C GFR Equation for Cirrhosis appear to more accurately estimate true GFR...
June 7, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28601768/heterotrophic-nitrification-and-aerobic-denitrification-by-diaphorobacter-polyhydroxybutyrativorans-sl-205-using-poly-3-hydroxybutyrate-co-3-hydroxyvalerate-as-the-sole-carbon-source
#14
Shusong Zhang, Xingbin Sun, Yueting Fan, Tianlei Qiu, Min Gao, Xuming Wang
A new strain of Diaphorobacter polyhydroxybutyrativorans (strain SL-205) was recently isolated and identified. SL-205 can utilize nitrate and nitrite for denitrification and ammonium for nitrification using poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) as the carbon source under aerobic conditions. SL-205 removed 99.11% of NH4(+)-derived N (83.90mg/L), 95.02% of NO3(-)-N (308.24mg/L), and 84.13% of NO2(-)-N (211.70mg/L), with average removal rates of 1.73mg NH4(+)-N/(L·h), 6.10mg NO3(-)-N/(L·h), and 4...
May 31, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28601372/a-randomized-controlled-study-in-reducing-procedural-pain-and-anxiety-using-high-concentration-nitrous-oxide
#15
Sacha I Duchicela, James A Meltzer, Sandra J Cunningham
No abstract text is available yet for this article.
May 1, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28597354/pharmacologic-considerations-for-pediatric-sedation-and-anesthesia-outside-the-operating-room-a-review-for-anesthesia-and-non-anesthesia-providers
#16
REVIEW
Narjeet Khurmi, Perene Patel, Molly Kraus, Terrence Trentman
Understanding the pharmacologic options for pediatric sedation outside the operating room will allow practitioners to formulate an ideal anesthetic plan, allaying anxiety and achieving optimal immobilization while ensuring rapid and efficient recovery. The authors identified relevant medical literature by searching PubMed, MEDLINE, Embase, Scopus, Web of Science, and Google Scholar databases for English language publications covering a period from 1984 to 2017. Search terms included pediatric anesthesia, pediatric sedation, non-operating room sedation, sedation safety, and pharmacology...
June 8, 2017: Paediatric Drugs
https://www.readbyqxmd.com/read/28595125/quantifying-nitrous-oxide-production-pathways-in-wastewater-treatment-systems-using-isotope-technology-a-critical-review
#17
REVIEW
Haoran Duan, Liu Ye, Dirk Erler, Bing-Jie Ni, Zhiguo Yuan
Nitrous oxide (N2O) is an important greenhouse gas and an ozone-depleting substance which can be emitted from wastewater treatment systems (WWTS) causing significant environmental impacts. Understanding the N2O production pathways and their contribution to total emissions is the key to effective mitigation. Isotope technology is a promising method that has been applied to WWTS for quantifying the N2O production pathways. Within the scope of WWTS, this article reviews the current status of different isotope approaches, including both natural abundance and labelled isotope approaches, to N2O production pathways quantification...
May 29, 2017: Water Research
https://www.readbyqxmd.com/read/28593055/a-surgical-cryoprobe-for-targeted-transcorneal-freezing-and-endothelial-cell-removal
#18
Alina Akhbanbetova, Shinichiro Nakano, Stacy L Littlechild, Robert D Young, Madara Zvirgzdina, Nigel J Fullwood, Ian Weston, Philip Weston, Shigeru Kinoshita, Naoki Okumura, Noriko Koizumi, Andrew J Quantock
PURPOSE: To examine the effects of transcorneal freezing using a new cryoprobe designed for corneal endothelial surgery. METHODS: A freezing console employing nitrous oxide as a cryogen was used to cool a series of different cryoprobe tip designs made of silver for high thermal conductivity. In vitro studies were conducted on 426 porcine corneas, followed by preliminary in vivo investigations on three rabbit corneas. RESULTS: The corneal epithelium was destroyed by transcorneal freezing, as expected; however, the epithelial basement membrane remained intact...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28585561/nitrogen-transformations-in-modern-agriculture-and-the-role-of-biological-nitrification-inhibition
#19
REVIEW
Devrim Coskun, Dev T Britto, Weiming Shi, Herbert J Kronzucker
The nitrogen (N)-use efficiency of agricultural plants is notoriously poor. Globally, about 50% of the N fertilizer applied to cropping systems is not absorbed by plants, but lost to the environment as ammonia (NH3), nitrate (NO3(-)), and nitrous oxide (N2O, a greenhouse gas with 300 times the heat-trapping capacity of carbon dioxide), raising agricultural production costs and contributing to pollution and climate change. These losses are driven by volatilization of NH3 and by a matrix of nitrification and denitrification reactions catalysed by soil microorganisms (chiefly bacteria and archaea)...
June 6, 2017: Nature Plants
https://www.readbyqxmd.com/read/28585372/widespread-production-of-nonmicrobial-greenhouse-gases-in-soils
#20
Bin Wang, Manuel Lerdau, Yongli He
Carbon dioxide (CO2 ), methane (CH4 ), and nitrous oxide (N2 O) are the three most important greenhouse gases (GHGs), and all show large uncertainties in their atmospheric budgets. Soils of natural and managed ecosystems play an extremely important role in modulating their atmospheric abundance. Mechanisms underlying the exchange of these GHGs at the soil-atmosphere interface are often assumed to be exclusively microbe-mediated (M-GHGs). We argue that it is a widespread phenomenon for soil systems to produce GHGs through nonmicrobial pathways (NM-GHGs) based on a review of the available evidence accumulated over the past half century...
June 6, 2017: Global Change Biology
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