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Nitrous oxide

Sepideh Gareh Sheyklo, Sakineh Hajebrahimi, Ahmad Moosavi, Fatemeh Pournaghi-Azar, Saber Azami-Aghdash, Morteza Ghojazadeh
Background and aim: Entonox was one of the important methods for pain management in the delivery process. In previous years some studies have assessed the effect of this method in Iran. In this regard, the aim of this study was to systematically review studies addressing the effect of Entonox for pain management in labor. Methods: This systematic review and meta-analysis study was conducted in 2016. The required data was collected using keywords such as "Entonox", "nitrous oxide", "vaginal delivery", "pain relief", "obstetric", "labor pain", and "labor analgesia", from databases including Google scholar, PubMed, Science Direct, Magiran, SID, and Scopus, and hand-searching of related and valid journals and references of articles...
December 2017: Electronic Physician
Jane S Moon, Catherine M Kuza, Manisha S Desai
William James greatly influenced the fields of psychology, philosophy, and religion during the late 19th and early 20th centuries. This was the era of Modernism, a time when many writers rejected the certainty of Enlightenment ideals. Positivism, which rose to prominence in the early 19th century, had emphasized physical phenomena, empirical evidence, and the scientific method. Darwin's On the Origin of Species (1859), with its theory of natural selection, provided an explanation for the evolution of species apart from a divine Creator...
January 2018: Journal of Anesthesia History
Jaan Pärn, Jos T A Verhoeven, Klaus Butterbach-Bahl, Nancy B Dise, Sami Ullah, Anto Aasa, Sergey Egorov, Mikk Espenberg, Järvi Järveoja, Jyrki Jauhiainen, Kuno Kasak, Leif Klemedtsson, Ain Kull, Fatima Laggoun-Défarge, Elena D Lapshina, Annalea Lohila, Krista Lõhmus, Martin Maddison, William J Mitsch, Christoph Müller, Ülo Niinemets, Bruce Osborne, Taavi Pae, Jüri-Ott Salm, Fotis Sgouridis, Kristina Sohar, Kaido Soosaar, Kathryn Storey, Alar Teemusk, Moses M Tenywa, Julien Tournebize, Jaak Truu, Gert Veber, Jorge A Villa, Seint Sann Zaw, Ülo Mander
Nitrous oxide (N2 O) is a powerful greenhouse gas and the main driver of stratospheric ozone depletion. Since soils are the largest source of N2 O, predicting soil response to changes in climate or land use is central to understanding and managing N2 O. Here we find that N2 O flux can be predicted by models incorporating soil nitrate concentration (NO3 - ), water content and temperature using a global field survey of N2 O emissions and potential driving factors across a wide range of organic soils. N2 O emissions increase with NO3 - and follow a bell-shaped distribution with water content...
March 19, 2018: Nature Communications
Yuchun Ma, Graeme Schwenke, Liying Sun, De Li Liu, Bin Wang, Bo Yang
Limited information exists on potential impacts of climate change on nitrous oxide (N2 O) emissions by including N2 -fixing legumes in crop rotations from rain-fed cropping systems. Data from two 3-yr crop rotations in northern NSW, Australia, viz. chickpea-wheat-barley (CpWB) and canola-wheat-barley (CaWB), were used to gain an insight on the role of legumes in mitigation of N2 O emissions. High-frequency N2 O fluxes measured with an automated system of static chambers were utilized to test the applicability of Denitrification and Decomposition model...
March 6, 2018: Science of the Total Environment
Raed Tafish, Khaled I Abu El Aish, Walid Madi
BACKGROUND: General anaesthesia and spinal anaesthesia are commonly used for caesarean sections. The aim of this study was to compare the outcomes from caesarean sections with these two types of anaesthesia. METHODS: In this quasi-controlled trial, we enrolled women undergoing caesarean sections at Al-Helal Al-Emirati Hospital, Rafah, Gaza Strip. Women were assigned either to general anaesthesia (20% intravenous propofol for anaesthesia induction followed by atracurium for muscle relaxation, and nitrous oxide and oxygen for anaesthesia maintenance) or to spinal anaesthesia (0·5% hyperbaric solution bupivacaine with 20 μg fentanyl intrathecally)...
February 21, 2018: Lancet
Ricardo Marques, Anna Ribera-Guardia, Jorge Santos, Gilda Carvalho, Maria A M Reis, Maite Pijuan, Adrian Oehmen
Denitrifying enhanced biological phosphorus removal (EBPR) systems can be an efficient means of removing phosphate (P) and nitrate (NO3 - ) with low carbon source and oxygen requirements. Tetrasphaera is one of the most abundant polyphosphate accumulating organisms present in EBPR systems, but their capacity to achieve denitrifying EBPR has not previously been determined. An enriched Tetrasphaera culture, comprising over 80% of the bacterial biovolume was obtained in this work. Despite the denitrification capacity of Tetrasphaera, this culture achieved only low levels of anoxic P-uptake...
March 7, 2018: Water Research
Yingshuai Liu, Yunshan Ge, Jianwei Tan, Mingliang Fu, Asad Naeem Shah, Luqiang Li, Zhe Ji, Yan Ding
Maritime transport has been playing a decisive role in global trade. Its contribution to the air pollution of the sea and coastal areas has been widely recognized. The air pollutant emission inventories of several harbors in China have already been established. However, the emission factors of local ships have not been addressed comprehensively, and thus are lacking from the emission inventories. In this study, on-board emission tests of eight diesel-powered offshore fishing ships were conducted near the coastal region of the northern Yellow Bo Sea fishing ground of Dalian, China...
March 2018: Journal of Environmental Sciences (China)
Raúl Cassia, Macarena Nocioni, Natalia Correa-Aragunde, Lorenzo Lamattina
Here, we review information on how plants face redox imbalance caused by climate change, and focus on the role of nitric oxide (NO) in this response. Life on Earth is possible thanks to greenhouse effect. Without it, temperature on Earth's surface would be around -19°C, instead of the current average of 14°C. Greenhouse effect is produced by greenhouse gasses (GHG) like water vapor, carbon dioxide (CO2 ), methane (CH4 ), nitrous oxides (Nx O) and ozone (O3 ). GHG have natural and anthropogenic origin. However, increasing GHG provokes extreme climate changes such as floods, droughts and heat, which induce reactive oxygen species (ROS) and oxidative stress in plants...
2018: Frontiers in Plant Science
Benoit Talbot, Maarten J Vonhof, Hugh G Broders, Brock Fenton, Nusha Keyghobadi
Parasite-host relationships create strong selection pressures that can lead to adaptation and increasing specialization of parasites to their hosts. Even in relatively loose host-parasite relationships, such as between generalist ectoparasites and their hosts, we may observe some degree of specialization of parasite populations to one of the multiple potential hosts. Salivary proteins are used by blood-feeding ectoparasites to prevent hemostasis in the host and maximize energy intake. We investigated the influence of association with specific host species on allele frequencies of salivary protein genes in Cimex adjunctus, a generalist blood-feeding ectoparasite of bats in North America...
March 15, 2018: Journal of Evolutionary Biology
Wan Yang, Shilong He, Ming Han, Bingbing Wang, Qigui Niu, Yujia Xu, Yi Chen, Haibo Wang
In this study, the nitrogen removal performance and microbial community structure were investigated during the start-up, instability, and recovery stages of an anaerobic ammonium oxidation (anammox) reactor loaded with compound carriers (shale ceramsite and suspended ball carrier). The results indicated that the anammox reactor successfully started up on 116th d when the nitrogen loading rate (NLR) reached 0.72 ± 0.05 kg N m-3  d-1 . The anammox reactor ran well with free ammonia (FA) at 13.65 ± 2...
March 10, 2018: Journal of Bioscience and Bioengineering
(no author information available yet)
No abstract text is available yet for this article.
April 2018: Anesthesiology
W Scott Beattie, Duminda N Wijeysundera, Matthew T V Chan, Philip J Peyton, Kate Leslie, Michael J Paech, Daniel I Sessler, Sophie Wallace, Paul S Myles, W Galagher, C Farrington, A Ditoro, S Baulch, S Sidiropoulos, R Bulach, D Bryant, E O'Loughlin, V Mitteregger, S Bolsin, C Osborne, R McRae, M Backstrom, R Cotter, S March, B Silbert, S Said, R Halliwell, J Cope, D Fahlbusch, D Crump, G Thompson, A Jefferies, M Reeves, N Buckley, T Tidy, T Schricker, R Lattermann, D Iannuzzi, J Carroll, M Jacka, C Bryden, N Badner, M W Y Tsang, B C P Cheng, A C M Fong, L C Y Chu, E G Y Koo, N Mohd, L E Ming, D Campbell, D McAllister, S Walker, S Olliff, R Kennedy, A Eldawlatly, T Alzahrani, N Chua, R Sneyd, H McMillan, I Parkinson, A Brennan, P Balaji, J Nightingale, G Kunst, M Dickinson, B Subramaniam, V Banner-Godspeed, J Liu, A Kurz, B Hesler, A Y Fu, C Egan, A N Fiffick, M T Hutcherson, A Turan, A Naylor, D Obal, E Cooke
BACKGROUND: Globally, >300 million patients have surgery annually, and ≤20% experience adverse postoperative events. We studied the impact of both cardiac and noncardiac adverse events on 1-year disability-free survival after noncardiac surgery. METHODS: We used the study cohort from the Evaluation of Nitrous oxide in Gas Mixture of Anesthesia (ENIGMA-II) trial, an international randomized trial of 6992 noncardiac surgical patients. All were ≥45 years of age and had moderate to high cardiac risk...
March 12, 2018: Anesthesia and Analgesia
Omid Ahmadi, Amir Shirvani Dehkordi, Farhad Heydari, Mohammad Nasr Esfahani, Behzad Mahaki
Background: Renal colic is a painful medical emergency, needs urgent intervention to reduce pain. Nonsteroidal anti-inflammatory drugs, opioids, and entonox are pain-relieving agents. This study was aimed to compare fentanyl + entonox (nitrous oxide + O2 ) versus fentanyl + oxygen. Materials and Methods: One hundred and twenty patients with acute renal colic presenting to the emergency department were enrolled. First, 50 μg fentanyl was infused for all patients...
2018: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
V Lew, E McKay, M Maze
Introduction: For a drug that has been omnipresent for nearly 200 years, nitrous oxide's (N2O) future seems less certain than its illustrious past. Environmental concerns are coming to the fore and may yet outweigh important clinical benefits. Sources of data: After determining the scope of the review, the authors used PubMed with select phrases encompassing the words in the scope. Both preclinical and clinical reports were considered. Areas of agreement: The analgesic and anaesthetic advantages of N2O remain despite a plethora of newer agents...
March 1, 2018: British Medical Bulletin
Liang Li, Yihua Dong, Guangsheng Qian, Xiaomin Hu, Linlin Ye
A pair of Fe-C electrodes was installed in a traditional submerged membrane bioreactor (MBR, Rc), and a novel asynchronous periodic reversal bio-electrocoagulation system (Re) was developed. The simultaneous nitrification and denitrification (SND) performance was discussed under limited dissolved oxygen (DO). Results showed that electrocoagulation enhanced total nitrogen (TN) removal from 59.48% to 75.09% at 1.2 mg/L DO. Additionally, Fe electrode could increase sludge concentration, particle size, and enzyme activities related to nitrogen removal...
February 28, 2018: Bioresource Technology
Ya-Dong Yang, Yue-Gao Hu, Zhi-Min Wang, Zhao-Hai Zeng
Denitrification causes nitrogen loss from agricultural soils and emission of nitrous oxide (N2 O). Water addition leads to an increase in soil moisture which greatly influenced soil denitrification. However, it is unclear how irrigation management affected the denitrifying bacterial communities in agricultural systems. In the present study, we investigated the abundance, diversity, and composition of the nirS-, nirK-, and nosZ-denitrifying bacterial communities in the soil under different long-term irrigation regimes by using real-time PCR (qPCR) and Illumina MiSeq sequencing approaches...
March 8, 2018: Environmental Science and Pollution Research International
Jens Leifeld
Nitrous oxide (N2 O) contributes substantially to greenhouse gas (GHG) emissions in the agricultural and land-use sectors. Owing to the high effort needed for measuring N2 O emissions and the resulting lack of sufficient field measurements to apply at country-wide scale, soil-borne N2 O emissions are often estimated by applying published IPCC default emission factors. To examine the data reported in the national GHG inventory, the current study utilizes a large data set of soil C/N ratios to predict N2 O emissions and their distribution from drained organic soils in Switzerland...
March 5, 2018: Science of the Total Environment
Xing Fan, Jie Chang, Yuan Ren, Xu Wu, Yuanyuan Du, Ronghua Xu, Dong Liu, Scott X Chang, Laura A Meyerson, Changhui Peng, Ying Ge
Dairy production is becoming more industrialized globally, especially in developing countries. The large amount of animal wastes from industrial feedlots cannot be fully used on nearby farmlands, leading to severe environmental problems. Using China as a case study, we found that most dairy feedlots employ a semi-coupled mode that only recycles solid manure to farmlands, and only a few dairy feedlots employ a fully-coupled mode that recycles both solid and liquid animal manure. To produce one ton of milk, the fully-coupled mode could reduce greenhouse gas (including carbon dioxide, methane, and nitrous oxide in this paper) emissions by 24%, ammonia emissions by 14%, and N discharge into water by 29%, compared with the semi-coupled systems...
March 8, 2018: Environmental Science & Technology
Arif Ullah, Dilawar Khan, Imran Khan, Shaofeng Zheng
The increasing trend of atmospheric carbon dioxide (CO2 ) is the main cause of harmful anthropogenic greenhouse gas emissions, which may result in environmental pollution, global warming, and climate change. These issues are expected to adversely affect the agricultural ecosystem and well-being of the society. In order to minimize food insecurity and prevent hunger, a timely adaptation is desirable to reduce potential losses and to seek alternatives for promoting a global knowledge system for agricultural sustainability...
March 7, 2018: Environmental Science and Pollution Research International
Chawki Jebali, Lotfi Boukadida, Ali Ousgi, Wael Chaabene, Borhen Shili, Mohamed Amin Naggara, Riadh Boukef
INTRODUCTION: Inhaled nitrous oxide (MEOPA) ensures short-term analgesia of a patient in spontaneous ventilation through a mask. It ensures analgesic coverage during the painful gesture while saving to the patient the phenomena of memorization. AIM: To study the efficacy and safety of the use of MEOPA during the make stitches. METHODS: Randomized double blind prospective study including any patient aged > 16 years admitted to the emergency for make stitches during a period of 3 months...
June 2017: La Tunisie Médicale
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