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https://www.readbyqxmd.com/read/28097611/assessing-nitrous-oxide-effect-using-electroencephalographically-based-depth-of-anesthesia-measures-cortical-state-and-cortical-input
#1
Levin Kuhlmann, David T J Liley
Existing electroencephalography (EEG) based depth of anesthesia monitors cannot reliably track sedative or anesthetic states during n-methyl-D-aspartate (NMDA) receptor antagonist based anesthesia with ketamine or nitrous oxide (N2O). Here, a physiologically-motivated depth of anesthesia monitoring algorithm based on autoregressive-moving-average (ARMA) modeling and derivative measures of interest, Cortical State (CS) and Cortical Input (CI), is retrospectively applied in an exploratory manner to the NMDA receptor antagonist N2O, an adjuvant anesthetic gas used in clinical practice...
January 17, 2017: Journal of Clinical Monitoring and Computing
https://www.readbyqxmd.com/read/28081525/effect-of-free-nitrous-acid-pre-treatment-on-primary-sludge-at-low-exposure-times
#2
S Zahedi, P Icaran, Z Yuan, M Pijuan
The present study was undertaken to investigate the effect of different free nitrous acid (FNA) concentrations at low pre-treatment times (PTs) (1, 2 and 5h) and without pH control with mild agitation on primary sludge (PS) biodegradability and methane production (MP). Increasing PTs resulted in an increase in the solubility of the organic matter (around 25%), but not on cell-mortality (>75% in all the cases with FNA) and neither on methane generation. FNA pre-treatment at low PTs improve MP (around 16% at PT of 1h and 650mg N-NO2(-)/L)...
January 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28081161/factors-related-with-ch4-and-n2o-emissions-from-a-paddy-field-clues-for-management-implications
#3
Chun Wang, Derrick Y F Lai, Jordi Sardans, Weiqi Wang, Congsheng Zeng, Josep Peñuelas
Paddy fields are major sources of global atmospheric greenhouse gases, including methane (CH4) and nitrous oxide (N2O). The different phases previous to emission (production, transport, diffusion, dissolution in pore water and ebullition) despite well-established have rarely been measured in field conditions. We examined them and their relationships with temperature, soil traits and plant biomass in a paddy field in Fujian, southeastern China. CH4 emission was positively correlated with CH4 production, plant-mediated transport, ebullition, diffusion, and concentration of dissolved CH4 in porewater and negatively correlated with sulfate concentration, suggesting the potential use of sulfate fertilizers to mitigate CH4 release...
2017: PloS One
https://www.readbyqxmd.com/read/28081083/molecular-dispersion-spectroscopy-based-on-fabry-perot-quantum-cascade-lasers
#4
Lukasz A Sterczewski, Jonas Westberg, Gerard Wysocki
Two Fabry-Perot quantum cascade lasers are used in a differential dual comb configuration to perform rapidly swept dispersion spectroscopy of low-pressure nitrous oxide with <1  ms acquisition time. Active feedback control of the laser injection current enables simultaneous wavelength modulation of both lasers at kilohertz rates. The system demonstrates similar performance in both absorption and dispersion spectroscopy modes and achieves a noise-equivalent absorption figure of merit in the low 10<sup>-4</sup>/Hz range...
January 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28079226/in-silico-kinetics-of-alkaline-hydrolysis-of-1-3-5-trinitro-1-3-5-triazinane-rdx-m06-2x-investigation
#5
L K Sviatenko, L Gorb, D Leszczynska, S I Okovytyy, M K Shukla, J Leszczynski
Alkaline hydrolysis of RDX (hexahydro-1,3,5-trinitro-1,3,5-triazine), as one of the most promising methods for nitrocompound remediation, was investigated computationally at the PCM(Pauling)/M06-2X/6-311++G(d,p) level of theory. Computational simulation shows that RDX hydrolysis is a highly exothermic multistep process involving initial deprotonation and nitrite elimination, cycle cleavage, further transformation of cycle-opened intermediates to end products caused by a series of C-N bond ruptures, hydroxide attachments, and proton transfers...
January 12, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28078520/effects-of-screenhouse-cultivation-and-organic-materials-incorporation-on-global-warming-potential-in-rice-fields
#6
Guochun Xu, Xin Liu, Qiangsheng Wang, Ruiheng Xiong, Yuhao Hang
Global rice production will be increasingly challenged by providing healthy food for a growing population at minimal environmental cost. In this study, a 2-year field experiment was conducted to investigate the effects of a novel rice cultivation mode (screenhouse cultivation, SHC) and organic material (OM) incorporation (wheat straw and wheat straw-based biogas residue) on methane (CH4) and nitrous oxide (N2O) emissions and rice yields. In addition, the environmental factors and soil properties were also determined...
January 11, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28077162/a-fixed-inhaled-nitrous-oxide-oxygen-mixture-as-an-analgesic-for-adult-cancer-patients-with-breakthrough-pain-study-protocol-for-a-randomized-controlled-trial
#7
Qiang Liu, Yu Wang, Xiang-Jiang Luo, Ning-Ju Wang, Ping Chen, Xin Jin, Guo-Xia Mu, Xiao-Min Chai, Yue-Juan Zhang, Yu-Xiang Li, Jian-Qiang Yu
BACKGROUND: The management of breakthrough pain in cancer patients is always a challenge for medical professions. Occurring in 80% of cancer patients with advanced disease, breakthrough pain significantly decreases both patient's and caregiver's quality of life. The aim of this study is to assess the analgesic efficacy of a fixed inhaled nitrous oxide/oxygen mixture for adult cancer patients with breakthrough pain. METHODS/DESIGN: This is a randomized, placebo-controlled, double-blind study; it will be conducted in the General Hospital of Ningxia Medical University...
January 11, 2017: Trials
https://www.readbyqxmd.com/read/28070812/plant-species-diversity-reduces-n2o-but-not-ch4-emissions-from-constructed-wetlands-under-high-nitrogen-levels
#8
Wenjuan Han, Mengmeng Shi, Jie Chang, Yuan Ren, Ronghua Xu, Chongbang Zhang, Ying Ge
Constructed wetlands (CWs) have been widely used for treating wastewater. CWs also are the sources of greenhouse gas (GHG) due to high pollutant load. It has been reported that plant species diversity can enhance nitrogen (N) removal efficiency in CWs for treating wastewater. However, the influence of plant species diversity on GHG emissions from CWs in habitats with high N levels still lack research. This study established four species richness levels (1, 2, 3, 4) and 15 species compositions by using 75 simulated vertical flow CWs microcosms to investigate the effects of plant species diversity on the GHG emissions and N removal efficiency of CWs with a high N level...
January 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28063654/biochar-decreases-nitrogen-oxide-and-enhances-methane-emissions-via-altering-microbial-community-composition-of-anaerobic-paddy-soil
#9
Ning Wang, Zhi-Zhou Chang, Xi-Mei Xue, Jian-Guang Yu, Xiao-Xia Shi, Lena Q Ma, Hong-Bo Li
Biochar application to agricultural soil is an appealing approach to mitigate nitrous oxide (N2O) and methane (CH4) emissions. However, the underlying microbial mechanisms are unclear. In this study, a paddy soil slurry was incubated anaerobically for 14d with biochar amendments produced from rice straw at 300, 500, or 700°C (B300, B500, and B700) to study their influences on greenhouse gas emissions. Illumina sequencing was used to characterize shift of soil bacterial and archaeal community composition. After peaking at day 1, N2O emission then sharply decreased to low levels while CH4 started to emit at day 3 then continually increased with incubation...
January 4, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28060363/genomic-repertoire-of-the-woeseiaceae-jtb255-cosmopolitan-and-abundant-core-members-of-microbial-communities-in-marine-sediments
#10
Marc Mußmann, Petra Pjevac, Karen Krüger, Stefan Dyksma
To date, very little is known about the bacterial core community of marine sediments. Here we study the environmental distribution, abundance and ecogenomics of the gammaproteobacterial Woeseiaceae/JTB255 marine benthic group. A meta-analysis of published work shows that the Woeseiaceae/JTB255 are ubiquitous and consistently rank among the most abundant 16S rRNA gene sequences in diverse marine sediments. They account for up to 22% of bacterial amplicons and 6% of total cell counts in European and Australian coastal sediments...
January 6, 2017: ISME Journal
https://www.readbyqxmd.com/read/28052075/field-based-estimates-of-global-warming-potential-in-bioenergy-systems-of-hawaii-crop-choice-and-deficit-irrigation
#11
Meghan N Pawlowski, Susan E Crow, Manyowa N Meki, James R Kiniry, Andrew D Taylor, Richard Ogoshi, Adel Youkhana, Mae Nakahata
Replacing fossil fuel with biofuel is environmentally viable from a climate change perspective only if the net greenhouse gas (GHG) footprint of the system is reduced. The effects of replacing annual arable crops with perennial bioenergy feedstocks on net GHG production and soil carbon (C) stock are critical to the system-level balance. Here, we compared GHG flux, crop yield, root biomass, and soil C stock under two potential tropical, perennial grass biofuel feedstocks: conventional sugarcane and ratoon-harvested, zero-tillage napiergrass...
2017: PloS One
https://www.readbyqxmd.com/read/28051192/global-warming-and-its-health-impact
#12
Antonella Rossati
Since the mid-19th century, human activities have increased greenhouse gases such as carbon dioxide, methane, and nitrous oxide in the Earth's atmosphere that resulted in increased average temperature. The effects of rising temperature include soil degradation, loss of productivity of agricultural land, desertification, loss of biodiversity, degradation of ecosystems, reduced fresh-water resources, acidification of the oceans, and the disruption and depletion of stratospheric ozone. All these have an impact on human health, causing non-communicable diseases such as injuries during natural disasters, malnutrition during famine, and increased mortality during heat waves due to complications in chronically ill patients...
January 2017: International Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28046142/nitrogen-utilization-efficiency-and-prediction-of-nitrogen-excretion-in-sheep-offered-fresh-perennial-ryegrass
#13
Y G Zhao, A W Gordon, N E O'Connell, T Yan
Nitrogen excretion from sheep production systems is an important source of nitrate, ammonia, and nitrous oxide responsible for groundwater pollution and global warming. The present study aimed to identify key parameters influencing N utilization efficiency and develop prediction equations for manure N, feces N, and urine N outputs in sheep. Data used were collected from 82 sheep offered fresh perennial ryegrass () as the sole diet in 6 metabolism experiments (data from non-grass-only diets were not used). Sheep were from breeds of Highlander, Texel, Scottish Blackface, and Swaledale at the age of 5 to 18 mo and weighing from 24...
December 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/28046072/effects-of-protease-addition-and-replacement-of-soybean-meal-by-corn-gluten-meal-on-the-growth-of-broilers-and-on-the-environmental-performances-of-a-broiler-production-system-in-greece
#14
Ilias Giannenas, Eleftherios Bonos, Vasileios Anestis, Georgios Filioussis, Dimitrios K Papanastasiou, Thomas Bartzanas, Nikolaos Papaioannou, Athina Tzora, Ioannis Skoufos
An experimental study was conducted to examine the combined effects of adding a dietary protease, reducing the levels of soybean meal (SBM) and introducing corn gluten meal (CGM) in the ration of a group of broilers reared on a commercial Greek farm. Five hundred forty chicks were divided into three dietary treatments with six replicates of thirty birds each. The first group (Control) was fed a conventional diet based on corn and soybean meal, containing 21% w/w crude protein (CP). The second group (Soy-Prot) was supplied a corn and SBM-based diet containing a lower level of CP (20% w/w) and 200 mg of the protease RONOZYME® Proact per kg of feed...
2017: PloS One
https://www.readbyqxmd.com/read/28043894/propionic-acid-metabolism-asd-and-vitamin-b12-is-there-a-role-for-environmental-nitrous-oxide
#15
Keith Fluegge
Foley et al. (2014) published their findings in this journal on the role of prenatal exposure to propionic acid (PPA) and behavioral outcomes in treated rat pups. The authors show that PPA treated pups displayed subtle differences in behavior including nest seeking, novel object recognition, and locomotor activity. Others have previously proposed that PPA infusion in rat could represent a valid animal model of ASD since many of the diagnostic criteria for the disorder spectrum manifest under such conditions...
December 30, 2016: International Journal of Developmental Neuroscience
https://www.readbyqxmd.com/read/28043416/antidiarrhoeal-investigation-of-apium-leptophyllum-pers-by-modulation-of-na-k-atpase-nitrous-oxide-and-intestinal-transit-in-rats
#16
Himanshu Bhusan Sahoo, Rakesh Sagar, Anjan Kumar, Amrita Bhaiji, Subrat Kumar Bhattamishra
BACKGROUND: Apium leptophyllum (Pers.) is an annual herb with traditional appreciation for various pharmacological properties; however, the scientific information on this herb is insufficient. The aim of the present investigation was undertaken to evaluate flavonoidal fraction of A. leptophyllum fruit (FFALF) against diarrhoea on albino rats. METHODS: The antidiarrhoeal study was conducted by castor oil induce diarrhoea, prostaglandin E2 (PGE2) induced enteropooling and intestinal transit by charcoal meal test...
December 2016: Biomedical Journal
https://www.readbyqxmd.com/read/28042430/experimental-protocol-of-dental-procedures-in-patients-with-hereditary-angioedema-the-role-of-anxiety-and-the-use-of-nitrogen-oxide
#17
A Rosa, M Miranda, R Franco, M G Guarino, A Barlattani, P Bollero
Hereditary angioedema (HAE) is a rare disease, little known to the medical and dental community, but with a growing rate of hospitalization over the years. HAE is due to a deficit/dysfunction of C1 esterase inhibitor which leads to an increase in vascular permeability and the appearance of edemas widespread in all body areas. The airways are the most affected and laryngeal swelling, which can occur, it is dangerous for the patient's life, is also a sensitive spot in our daily practice, therefore, it is also important to be aware of all the signs of this disease...
April 2016: Oral & Implantology
https://www.readbyqxmd.com/read/28040920/mid-infrared-gas-absorption-sensor-based-on-a-broadband-external-cavity-quantum-cascade-laser
#18
Juan Sun, Hao Deng, Ningwu Liu, Hongliang Wang, Benli Yu, Jingsong Li
We developed a laser absorption sensor based on a pulsed, broadband tunable external cavity quantum cascade laser (ECQCL) centered at 1285 cm(-1). Unlike traditional infrared spectroscopy system, a quartz crystal tuning fork (QCTF) as a light detector was used for laser signal detection. Fast Fourier transform was applied to extract vibration intensity information of QCTF. The sensor system is successfully tested on nitrous oxide (N2O) spectroscopy measurements and compared with a standard infrared detector...
December 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28039557/on-the-mechanical-analogue-of-dna
#19
Ludmila Yakushevich
The creation of mechanical analogues of biological systems is known as a useful instrument that helps to understand better the dynamical mechanisms of the functioning of living organisms. Mechanical analogues of biomolecules are usually constructed for imitation of their internal mobility, which is one of the most important properties of the molecules. Among the different types of internal motions, angular oscillations of nitrous bases are of special interest because they make a substantial contribution to the base pairs opening that in turn is an important element of the process of the DNA-protein recognition...
December 30, 2016: Journal of Biological Physics
https://www.readbyqxmd.com/read/28038400/quantification-of-nitrous-oxide-n2o-emissions-and-soluble-microbial-product-smp-production-by-a-modified-aob-nob-n2o-smp-model
#20
MinJeong Kim, Guangxue Wu, ChangKyoo Yoo
A modified AOB-NOB-N2O-SMP model able to quantify nitrous oxide (N2O) emissions and soluble microbial product (SMP) production during wastewater treatment is proposed. The modified AOB-NOB-N2O-SMP model takes into account: (1) two-step nitrification by ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB), (2) N2O production by AOB denitrification under oxygen-limited conditions and (3) SMP production by microbial growth and endogenous respiration. Validity of the modified model is demonstrated by comparing the simulation results with experimental data from lab-scale sequencing batch reactors (SBRs)...
March 2017: Bioresource Technology
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