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https://www.readbyqxmd.com/read/28511452/the-effect-of-entonox-on-labour-pain-relief-among-nulliparous-women-a-randomized-controlled-trial
#1
Parisa Parsa, Nafiseh Saeedzadeh, Ghodratallah Roshanaei, Fatameh Shobeiri, Faryar Hakemzadeh
INTRODUCTION: Labour pain is one of the most severe pain in humans. Fear of labour pain is the most dreadful reason for Caesarean Section (CS). Entonox (a mixture of nitrous oxide+oxygen) is a safe inhalational analgesia during labour pain. AIM: This study investigated the effect of entonox on pain relief and length of labour in nulliparous women. MATERIALS AND METHODS: A clinical trial study was conducted among 120 nulliparous women (60 in intervention and 60 in control group) in 2015 in Atieh Hospital, Hamadan city, Iran...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28509799/nitrous-oxide-from-a-peach-of-a-specialist-j-warren-worcester-m-d
#2
(no author information available yet)
No abstract text is available yet for this article.
June 2017: Anesthesiology
https://www.readbyqxmd.com/read/28509797/extending-the-anesthetic-duration-of-nitrous-oxide-with-valerian-an-herbal-sedative
#3
(no author information available yet)
No abstract text is available yet for this article.
June 2017: Anesthesiology
https://www.readbyqxmd.com/read/28509546/growth-of-nitrosococcus-related-ammonia-oxidizing-bacteria-coincides-with-extremely-low-ph-values-in-high-strength-nitrogen-wastewater
#4
Alexandra Fumasoli, Helmut Buergmann, David G Weissbrodt, George F Wells, Karin Beck, Joachim Mohn, Eberhard Morgenroth, Kai M Udert
Ammonia oxidation decreases the pH in wastewaters where the alkalinity is limited relative to the total ammonia. The activity of ammonia oxidizing bacteria (AOB), however, typically decreases with pH and often ceases completely in slightly acidic wastewaters. Nevertheless, low pH nitrification has been reported in reactors treating human urine, but it is not clear which organisms are involved. In this study, we followed the population dynamics of ammonia oxidizing organisms and reactor performance in synthetic, synthetic fully hydrolysed urine as the pH decreased over time in response to a decrease in the loading rate...
May 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28499181/influence-of-temperature-and-ph-on-the-anammox-process-a-review-and-meta-analysis
#5
REVIEW
Mariusz Tomaszewski, Grzegorz Cema, Aleksandra Ziembińska-Buczyńska
The anammox (anaerobic ammonium oxidation) process was considered a very efficient and economic wastewater treatment technology immediately after its discovery in 1995, thus research in this field was intensified. The anammox process is characterised by a high temperature optimum and is very sensitive to both temperature and pH fluctuations. The process can also be inhibited by many factors, including by its substrates, i.e. nitrite and ammonium (or its unionised forms: free ammonia and free nitrous acid). This paper presents a comprehensive study of the most important and recent findings on the influence of two parameters that are crucial in wastewater treatment, i...
May 2, 2017: Chemosphere
https://www.readbyqxmd.com/read/28497520/nitrous-oxide-for-procedural-analgesia-at-home-in-a-child-with-epidermolysis-bullosa
#6
Pablo Ingelmo, Andrew Wei, Gonzalo Rivera
Epidermolysis bullosa comprises a range of conditions characterized by fragile skin with painful blistering induced by minor trauma and friction. The Dowling-Meara variant is a severe form characterized by disseminated painful blistering requiring lifelong skin and wound care. The natural history of the disease is characterized by a chronic course that tends to improve with advancing age. Various multimodal analgesic strategies have been proposed for painful procedures in children with epidermolysis bullosa...
May 11, 2017: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/28493368/microbial-nitrous-oxide-emissions-in-dryland-ecosystems-mechanisms-microbiome-and-mitigation
#7
Hang-Wei Hu, Pankaj Trivedi, Ji-Zheng He, Brajesh K Singh
Globally, drylands represent the largest terrestrial biome and are projected to expand by 23% by the end of this century. Drylands are characterized by extremely low levels of water and nutrients and exhibit highly heterogeneous distribution in plants and biocrusts which make microbial processes shaping the dryland functioning rather unique compared with other terrestrial ecosystems. Nitrous oxide (N2 O) is a powerful greenhouse gas with ozone depletion potential. Despite of the pivotal influences of microbial communities on the production and consumption of N2 O, we have limited knowledge of the biological pathways and mechanisms underpinning N2 O emissions from drylands, which are estimated to account for 30% of total gaseous nitrogen emissions on Earth...
May 10, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28492195/evaluation-of-nitrous-oxide-oxygen-and-triclofos-sodium-as-conscious-sedative-agents
#8
Priya Subramaniam, K L Girish Babu, Disha Lakhotia
BACKGROUND: Conscious sedation is used in the pediatric dentistry to reduce fear and anxiety in children and promote favorable treatment outcomes. To achieve them, the primary clinical need is for a well-tolerated, effective, and expedient analgesic and sedative agent that is safe to use. AIM: The aim of the present study was to evaluate the efficacy of nitrous oxide-oxygen and triclofos sodium as conscious sedative agents in 5-10-year-old children. METHODOLOGY: Sixty children aged 5-10 years showing anxious, uncooperative, and apprehensive behavior were randomly divided and assigned into two groups (Groups A and B) such that Group A received 40% nitrous oxide-60% oxygen and Group B received triclofos sodium in the dose of 70 mg/kg body weight, given 30 min before the treatment procedure...
April 2017: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/28482116/pollution-tolerant-invertebrates-enhance-greenhouse-gas-flux-in-urban-wetlands
#9
Andrew S Mehring, Perran L M Cook, Victor Evrard, Stanley B Grant, Lisa A Levin
One of the goals of urban ecology is to link community structure to ecosystem function in urban habitats. Pollution-tolerant wetland invertebrates have been shown to enhance greenhouse gas (GHG) flux in controlled laboratory experiments, suggesting that they may influence urban wetland roles as sources or sinks of GHG. However, it is unclear if their effects can be detected in highly variable conditions in a field setting. Here we use an extensive dataset on carbon dioxide (CO2 ), methane (CH4 ), and nitrous oxide (N2 O) flux in sediment cores (n = 103) collected from ten urban wetlands in Melbourne, Australia during summer and winter in order to test for invertebrate enhancement of GHG flux...
May 8, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28481923/nitrapyrin-addition-mitigates-nitrous-oxide-emissions-and-raises-nitrogen-use-efficiency-in-plastic-film-mulched-drip-fertigated-cotton-field
#10
Tao Liu, Yongchao Liang, Guixin Chu
Nitrification inhibitors (NIs) have been used extensively to reduce nitrogen losses and increase crop nitrogen nutrition. However, information is still scant regarding the influence of NIs on nitrogen transformation, nitrous oxide (N2O) emission and nitrogen utilization in plastic-film-mulched calcareous soil under high frequency drip-fertigated condition. Therefore, a field trial was conducted to evaluate the effect of nitrapyrin (2-chloro-6-(trichloromethyl)-pyridine) on soil mineral nitrogen (N) transformation, N2O emission and nitrogen use efficiency (NUE) in a drip-fertigated cotton-growing calcareous field...
2017: PloS One
https://www.readbyqxmd.com/read/28476240/effect-of-free-ammonium-and-free-nitrous-acid-on-the-activity-aggregate-morphology-and-eps-distribution-of-ammonium-oxidizing-bacteria-in-partial-nitrification
#11
Qian Yao, Dangcong Peng, Bo Wang, Yuanyuan Chen, Jiaqi Li, Qiaodi Zhao, Binbin Wang
Successful partial nitrification not only guarantees the inhibition of nitrite oxidation, but also does not excessively retard the ammonia oxidation rate. Therefore, the performance of ammonium oxidizing bacteria (AOB) during partial nitrification is fundamental to this process. In this study, two lab-scale partial nitrification bioreactors containing different inhibition conditions-one with free ammonium (FA) inhibition, the other with free nitrous acid (FNA) inhibition-were used to compare the differences between activity, quantity, aggregation morphology and extracellular polymeric substance (EPS) distribution of AOB...
May 2, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28475231/successful-use-of-nitrous-oxide-during-lumbar-punctures-a-call-for-nitrous-oxide-in-pediatric-oncology-clinics
#12
Mylynda Livingston, Miranda Lawell, Nancy McAllister
Numerous reports describe the successful use of nitrous oxide for analgesia in children undergoing painful procedures. Although shown to be safe, effective, and economical, nitrous oxide use is not yet common in pediatric oncology clinics and few reports detail its effectiveness for children undergoing repeated lumbar punctures. We developed a nitrous oxide clinic, and undertook a review of pediatric oncology lumbar puncture records for those patients receiving nitrous oxide in 2011. No major complications were noted...
May 5, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28474433/regulation-of-nitrous-oxide-reductase-genes-by-nast-mediated-transcription-antitermination-in-bradyrhizobium-diazoefficiens
#13
Cristina Sánchez, Hisayuki Mitsui, Kiwamu Minamisawa
In Bradyrhizobium diazoefficiens, maximal expression of the nitrous oxide reductase gene (nosZ) requires oxygen limitation and the presence of a nitrogen oxide. The putative transcription antiterminator NasT is a positive regulator of nosZ; but in the absence of nitrate, NasT is counteracted by the nitrate sensor NasS. Here we examined the NasT-mediated mechanism of nosRZDFYLX gene cluster expression. We mapped two transcription start sites of nosR and identified two potential hairpins, H1 and H2, within the 5'-leader of nosR transcripts...
May 4, 2017: Environmental Microbiology Reports
https://www.readbyqxmd.com/read/28470424/nitrogen-transformation-under-different-dissolved-oxygen-levels-by-the-anoxygenic-phototrophic-bacterium-marichromatium-gracile
#14
Xuan Hong, Zhongwei Chen, Chungui Zhao, Suping Yang
Marichromatium gracile: YL28 (M. gracile YL28) is an anoxygenic phototrophic bacterial strain that utilizes ammonia, nitrate, or nitrite as its sole nitrogen source during growth. In this study, we investigated the removal and transformation of ammonium, nitrate, and nitrite by M. gracile YL28 grown in a combinatorial culture system of sodium acetate-ammonium, sodium acetate-nitrate and sodium acetate-nitrite in response to different initial dissolved oxygen (DO) levels. In the sodium acetate-ammonium system under aerobic conditions (initial DO = 7...
June 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28468122/methane-and-nitrous-oxide-annual-emissions-from-an-old-eutrophic-temperate-reservoir
#15
S Descloux, V Chanudet, D Serça, F Guérin
Two greenhouse gases -methane (CH4) and nitrous oxide (N2O) - were monitored monthly during one year (2011) at the Eguzon Reservoir in France. The objective of the study was to quantify for the first time in a temperate area the total emissions of these gases through the main emission pathways (diffusion and bubbling from the reservoir, degassing and downstream diffusion). The reservoir was impounded in 1926 and had, in 2011, a eutrophic status promoting high organic matter degradation and nitrification-denitrification, all favouring CH4 and N2O production...
April 28, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28467840/nitrous-oxide-abatement-coupled-with-biopolymer-production-as-a-model-ghg-biorefinery-for-cost-effective-climate-change-mitigation
#16
Osvaldo D Frutos, Irene Cortes, Sara Cantera, Esther Arnaiz, Raquel Lebrero, Raúl Muñoz
N2O represents ∼6% of the global greenhouse gas emission inventory and the most important O3-depleting substance emitted in this 21st century. Despite its environmental relevance, little attention has been given to cost-effective and environmentally friendly N2O abatement methods. Here we examined, the potential of a bubble column (BCR) and an internal loop airlift (ALR) bioreactors of 2.3 L for the abatement of N2O from a nitric acid plant emission. The process was based on the biological reduction of N2O by Paracoccus denitrificans using methanol as a carbon/electron source...
May 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28467048/nitrous-oxide-and-dinitrogen-the-missing-flux-in-nitrogen-budgets-of-forested-catchments
#17
Eric M Enanga, Nora J Casson, Tarrah A Fairweather, Irena F Creed
Most forest nitrogen budgets are imbalanced, with nitrogen inputs exceeding nitrogen outputs. The denitrification products nitrous oxide (N2O) and dinitrogen (N2) represent often-unmeasured fluxes that may close the gap between explained nitrogen inputs and outputs. Gaseous N2O and N2 effluxes, dissolved N2O flux, and traditionally measured dissolved nitrogen species (i.e., nitrate, ammonium, and dissolved organic nitrogen) were estimated to account for the annual nitrogen output along hillslope gradients from two catchments in a temperate forest...
May 3, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28461497/folate-rescues-vitamin-b12-depletion-induced-inhibition-of-nuclear-thymidylate-biosynthesis-and-genome-instability
#18
Ashley M Palmer, Elena Kamynina, Martha S Field, Patrick J Stover
Clinical vitamin B12 deficiency can result in megaloblastic anemia, which results from the inhibition of DNA synthesis by trapping folate cofactors in the form of 5-methyltetrahydrofolate (5-methylTHF) and subsequent inhibition of de novo thymidylate (dTMP) biosynthesis. In the cytosol, vitamin B12 functions in the remethylation of homocysteine to methionine, which regenerates THF from 5-methylTHF. In the nucleus, THF is required for de novo dTMP biosynthesis, but it is not understood how 5-methylTHF accumulation in the cytosol impairs nuclear dTMP biosynthesis...
May 1, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28453404/effects-of-biofilter-media-depth-and-moisture-content-on-removal-of-gases-from-a-swine-barn
#19
Tongshuai Liu, Hongmin Dong, Zhiping Zhu, Bin Shang, Fubin Yin, Wanqin Zhang, Tanlong Zhou
Media depth (MD) and moisture content (MC) are two important factors that greatly influence biofilters performance. The purpose of this study was to investigate the combined effect of MC and MD on removing ammonia (NH3), hydrogen sulfide (H2S), and nitrous oxide (N2O) from swine barns. Biofiltration performance of different MDs and MCs combination based on the mixed medium of wood chips and compost were monitored. A 3×3 factorial design was adopted, which included three levels of the two factors (MC: 45%, 55%, and 67% (wet basis); MD: 0...
April 28, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28451962/estimation-of-green-house-gas-emissions-from-koteshwar-hydropower-reservoir-india
#20
Amit Kumar, M P Sharma
The emissions of greenhouse gas (GHG) from soils are of significant importance for global warming. The biological and physico-chemical characteristics of soil affect the GHG emissions from soils of different land use types. Methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2) production rates from six forest and agricultural soil types in the Koteshwar hydropower reservoir catchments located in the Uttarakhand, India, were estimated and their relations with physico-chemical characteristics of soils were examined...
May 2017: Environmental Monitoring and Assessment
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