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https://www.readbyqxmd.com/read/28453404/effects-of-biofilter-media-depth-and-moisture-content-on-removal-of-gases-from-a-swine-barn
#1
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/28448607/complementing-the-topsoil-information-of-the-land-use-land-cover-area-frame-survey-lucas-with-modelled-n2o-emissions
#2
Emanuele Lugato, Lily Paniagua, Arwyn Jones, Wim de Vries, Adrian Leip
Two objectives of the Common Agricultural Policy post-2013 (CAP, 2014-2020) in the European Union (EU) are the sustainable management of natural resources and climate smart agriculture. To understand the CAP impact on these priorities, the Land Use/Cover statistical Area frame Survey (LUCAS) employs direct field observations and soil sub-sampling across the EU. While a huge amount of information can be retrieved from LUCAS points for monitoring the environmental status of agroecosystems and assessing soil carbon sequestration, a fundamental aspect relating to climate change action is missing, namely nitrous oxide (N2O) soil emissions...
2017: PloS One
https://www.readbyqxmd.com/read/28448341/a-nurse-directed-model-for-nitrous-oxide-use-during-labor
#3
(no author information available yet)
No abstract text is available yet for this article.
May 2017: MCN. the American Journal of Maternal Child Nursing
https://www.readbyqxmd.com/read/28448331/a-nurse-directed-model-for-nitrous-oxide-use-during-labor
#4
Toni Pinyan, Kelly Curlee, Mellanie Keever, Kathleen M Baldwin
BACKGROUND: Nitrous oxide has a long history of use and has been well documented in the literature as a safe, effective, and inexpensive option for pain management in labor in other countries, but it is underused in the United States. LOCAL PROBLEM: Pain relief options for laboring women in rural community hospitals with a small perinatal service are limited due to lack of availability of in-house anesthesia coverage. METHOD: This quality improvement project involved development and implementation of a nurse-driven, self-administered, demand-flow nitrous oxide program as an option for pain relief for laboring women in a rural community hospital...
May 2017: MCN. the American Journal of Maternal Child Nursing
https://www.readbyqxmd.com/read/28448139/suppression-of-nitrite-oxidizing-bacteria-in-intermittently-membrane-aerated-biofilms-a-model-based-explanation
#5
Yunjie Ma, Carlos Domingo-Félez, Benedek Gy Plosz, Barth F Smets
Autotrophic ammonium oxidation in membrane-aerated biofilm reactors (MABRs) can make treatment of ammonium-rich wastewaters more energy-efficient, especially within the context of short-cut ammonium removal. The challenge is to exclusively enrich ammonium-oxidizing bacteria (AOB). To achieve nitritation, strategies to suppress nitrite-oxidizing bacteria (NOB) are needed, which are ideally grounded on an understanding of underlying mechanisms. In this study, a counter-diffusion nitrifying biofilm reactor was operated under intermittent aeration...
April 27, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28442276/investigating-the-effects-of-nitrous-oxide-sedation-on-frontal-parietal-interactions
#6
Ryu Ji-Ho, Pil-Jong Kim, Hong-Gee Kim, Yong-Seo Koo, Teo Jeon Shin
Although functional connectivity has received considerable attention in the study of consciousness, few studies have investigated functional connectivity limited to the sedated state where consciousness is maintained but impaired. The aim of the present study was to investigate changes in functional connectivity of the parietal-frontal network resulting from nitrous oxide-induced sedation, and to determine the neural correlates of cognitive impairment during consciousness transition states. Electroencephalography was acquired from healthy adult patients who underwent nitrous oxide inhalation to induce cognitive impairment, and was analyzed using Granger causality (GC)...
April 22, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28442002/n2o-emission-and-hydroxylamine-oxidase-hao-activity-in-a-nitrogen-removal-process-based-on-activated-sludge-with-three-cod-nh4-ratios
#7
Zhi-Xian He, Lin-Jiang Yuan, Yi-Ni Wei, Ya-Ping Nan
  This study dealt with nitrous oxide (N2O) emission and hydroxylamine oxidase (HAO) activity of waste sludge in a nitrification and denitrification process employing three carbon nitrogen (C/N) ratios in a sequencing batch reactor (SBR). The experimental results indicated that N2O emission increased dramatically after the C/N ratio in the sludge increased from 6.5 to 9.3, which was greater than the N2O emission at two other C/N ratios (3.5, 6.5). The HAO activity in the anoxic period was higher with all three C/N ratios than in the aerobic period...
May 1, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28441152/cryoablation-in-the-management-of-barrett-s-esophagus
#8
Anouk Overwater, Bas L A M Weusten
PURPOSE OF REVIEW: Providing an overview on types of cryotherapy for esophageal application and their role in the management of Barrett's esophagus. RECENT FINDINGS: Recent studies have involved multiple types of cryotherapy including cryospray techniques that use either liquid nitrogen or carbon dioxide as the cryogenic fluid, and the CryoBalloon focal ablation device that uses nitrous oxide. Overall, studies report cryotherapy to be safe and effective in eradicating Barrett's epithelium...
April 24, 2017: Current Opinion in Gastroenterology
https://www.readbyqxmd.com/read/28437304/nitrous-oxide-utility-in-labor-and-birth-a-multipurpose-modality
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
(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
#16
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
#17
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
#18
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
#19
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
#20
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
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