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https://www.readbyqxmd.com/read/29331895/reduction-in-soil-n2o-emissions-by-ph-manipulation-and-enhanced-nosz-gene-transcription-under-different-water-regimes
#1
Muhammad Shaaban, Yupeng Wu, Muhammad Salman Khalid, Qi-An Peng, Xiangyu Xu, Lei Wu, Aneela Younas, Saqib Bashir, Yongliang Mo, Shan Lin, Muhammad Zafar-Ul-Hye, Muhammad Abid, Ronggui Hu
Several studies have been carried out to examine nitrous oxide (N2O) emissions from agricultural soils in the past. However, the emissions of N2O particularly during amelioration of acidic soils have been rarely studied. We carried out the present study using a rice-rapeseed rotation soil (pH 5.44) that was amended with dolomite (0, 1 and 2 g kg-1 soil) under 60% water filled pore space (WFPS) and flooding. N2O emissions and several soil properties (pH, NH4+N, NO3--N, and nosZ gene transcripts) were measured throughout the study...
January 11, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29330894/structure-function-and-evolution-of-the-hemerythrin-like-domain-superfamily
#2
Claudia Alvarez-Carreño, Vikram Alva, Arturo Becerra, Antonio Lazcano
Hemerythrin-like proteins have generally been studied for their ability to reversibly bind oxygen through their binuclear non-heme iron centers. However, in recent years, it has become increasingly evident that some members of the hemerythrin-like superfamily also participate in many other biological processes. For instance, the binuclear non-heme iron site of YtfE, a hemerythrin-like protein involved in the repair of iron centers in Escherichia coli, catalyzes the reduction of nitric oxide to nitrous oxide, and the human F-box/LRR-repeat protein 5, which contains a hemerythrin-like domain, is involved in intracellular iron homeostasis...
January 13, 2018: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/29330647/absence-of-the-nitrous-oxide-reductase-gene-cluster-in-commercial-alfalfa-inoculants-is-probably-due-to-the-extensive-loss-of-genes-during-rhizobial-domestication
#3
Silvina Brambilla, Romina Frare, Gabriela Soto, Cintia Jozefkowicz, Nicolás Ayub
As other legume crops, alfalfa cultivation increases the emission of the greenhouse gas nitrous oxide (N2O). Since legume-symbiotic nitrogen-fixing bacteria play a crucial role in this emission, it is important to understand the possible impacts of rhizobial domestication on the evolution of denitrification genes. In comparison with the genomes of non-commercial strains, those of commercial alfalfa inoculants exhibit low total genome size, low number of ORFs and high numbers of both frameshifted genes and pseudogenes, suggesting a dramatic loss of genes during bacterial domestication...
January 12, 2018: Microbial Ecology
https://www.readbyqxmd.com/read/29316032/optimum-time-for-intravenous-cannulation-after-induction-with-sevoflurane-oxygen-and-nitrous-oxide-in-children-without-any-premedication
#4
Abm Kamrul Hasan, Raman Sivasankar, Salil G Nair, Wamia U Hasan, Zulaidi Latif
BACKGROUND: Intravenous cannulation is usually done in children after inhalational induction with volatile anesthetic agents. The optimum time for safe intravenous cannulation after induction with sevoflurane, oxygen, and nitrous oxide has been studied in premedicated children, but there is no information for the optimum time for cannulation with inhalational induction in children without premedication. AIMS: The aim of this study was to determine the optimum time for intravenous cannulation after the induction of anesthesia with sevoflurane, oxygen, and nitrous oxide in children without any premedication...
January 8, 2018: Paediatric Anaesthesia
https://www.readbyqxmd.com/read/29315308/mac-sparing-effect-of-nitrous-oxide-in-sevoflurane-anesthetized-sheep-and-its-reversal-with-systemic-atipamezole-administration
#5
Lauren Duffee, Nicolò Columbano, Antonio Scanu, Valentino Melosu, Giovanni Mario Careddu, Giovanni Sotgiu, Bernd Driessen
INTRODUCTION: Nitrous oxide (N2O) is an anesthetic gas with antinociceptive properties and reduces the minimum alveolar concentration (MAC) for volatile anesthetic agents, potentially through mechanisms involving central alpha2-adrenoceptors. We hypothesized that 70% N2O in the inspired gas will significantly reduce the MAC of sevoflurane (MACSEVO) in sheep, and that this effect can be reversed by systemic atipamezole. MATERIALS AND METHODS: Animals were initially anesthetized with SEVO in oxygen (O2) and exposed to an electrical current as supramaximal noxious stimulus in order to determine MACSEVO (in duplicates)...
2018: PloS One
https://www.readbyqxmd.com/read/29313375/nitrous-oxide-abuse-presenting-with-acute-psychosis-and-peripheral-neuropathy
#6
Anthony Hew, Eugene Lai, Emma Radford
No abstract text is available yet for this article.
January 1, 2018: Australian and New Zealand Journal of Psychiatry
https://www.readbyqxmd.com/read/29306831/annual-n2o-emissions-from-conventionally-grazed-typical-alpine-grass-meadows-in-the-eastern-qinghai-tibetan-plateau
#7
Han Zhang, Zhisheng Yao, Kai Wang, Xunhua Zheng, Lei Ma, Rui Wang, Chunyan Liu, Wei Zhang, Bo Zhu, Xiangyu Tang, Zhenghua Hu, Shenghui Han
Annual nitrous oxide (N2O) emissions from high-altitude alpine meadow grasslands have not been effectively characterized because of the scarcity of whole-year measurements. The authors performed a year-round measurement of N2O fluxes from three conventionally grazed alpine meadows that represent the typical meadow landscape in the eastern Qinghai-Tibetan Plateau (QTP). The results showed that annual N2O emissions averaged 0.123±0.053 (2SD, i.e., the double standard deviation indicating the 95% confidence interval) kgNha-1yr-1 across the three meadow sites...
January 4, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29303256/high-precision-measurement-of-n2o-concentration-in-ice-cores
#8
Yeongjun Ryu, Jinho Ahn, Ji-Woong Yang
Atmospheric nitrous oxide (N2O) is a greenhouse gas and ozone-depleting substance whose emissions are substantially perturbed by current human activities. Although air trapped in polar ice cores can provide direct information about N2O evolution, analytical precision was not previously sufficient for high temporal resolution studies. In this work, we present a highly improved analytical technique with which to study N2O concentrations in ancient-air-trapped ice cores. We adopt a melt-refreezing method to extract air and use a gas chromatography-electron capture detector (GC-ECD) to determine N2O concentrations...
January 5, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29302193/management-of-trauma-pain-in-the-emergency-setting-low-dose-methoxyflurane-or-nitrous-oxide-a-systematic-review-and-indirect-treatment-comparison
#9
REVIEW
Keith M Porter, Mohd Kashif Siddiqui, Ikksheta Sharma, Sara Dickerson, Alice Eberhardt
Background: Low-dose methoxyflurane and nitrous oxide (N2O; 50:50 with oxygen) are both self-administered, self-titrated, rapid-acting, nonnarcotic, and noninvasive inhalational agents with similar onset times of pain relief. The aim of this review was to compare the clinical efficacy, safety, and tolerability of these analgesics in emergency care. Materials and methods: A systematic literature search and review according to Preferred Reporting Items for Systematic Reviews and Meta-analyses guidelines were performed using Embase, Medline, the Cochrane Library, several clinical trial registers, and emergency-medicine conference material...
2018: Journal of Pain Research
https://www.readbyqxmd.com/read/29297760/silk-fibroin-porous-scaffolds-by-n2o-foaming
#10
Devid Maniglio, Walter Bonani, Claudio Migliaresi, Antonella Motta
Silk fibroin has acquired increasing interest for biomedical applications, and namely for the fabrication of scaffolds for tissue engineering, because of its highly positive biological interaction and the possibility to adapt the material to several application requirements by adopting different fabrication methods, in order to make films, sponges, fibers, nets or gels with predictable degradation times. For tissue engineering, in most cases porous scaffolds are required, in some cases possibly in situ forming and therefore fabricated in mild body-compatible conditions...
January 3, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29291531/restoration-of-real-sewage-partial-nitritation-anammox-process-from-nitrate-accumulation-using-free-nitrous-acid-treatment
#11
Zhibin Wang, Shujun Zhang, Liang Zhang, Bo Wang, Wenlong Liu, Shuqing Ma, Yongzhen Peng
This study presented a strategy for recovering partial nitritation-anammox (PN/A) of real sewage from nitrate accumulation using free nitrous acid (FNA) treatment. Sewage PN/A was successfully achieved in an integrated fixed-film activated sludge (IFAS) reactor but effluent nitrate gradually increased. For recovering the system performance, flocculent sludge of the reactor was collected and treated with FNA of 1.35 mg/L for 24 h. After FNA treatment, effluent nitrate decreased from 17.6 to 6.1 mg/L with an increase of total nitrogen removal efficiency from 29...
December 27, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29284146/antioxidative-and-immunostimulatory-effect-of-dietary-cinnamon-nanoparticles-on-the-performance-of-nile-tilapia-oreochromis-niloticus-l-and-its-susceptibility-to-hypoxia-stress-and-aeromonas-hydrophila-infection
#12
Mohsen Abdel-Tawwab, Fatma Samir, Asmaa S Abd El-Naby, Mohamed N Monier
An experiment was conducted to evaluate the effect of dietary cinnamon nanoparticles (CNP) on growth performance, antioxidant and digestive enzymes activities, and innate immunity of Nile tilapia, Oreochromis niloticus (L.). Fish (9.7 ± 0.3 g) were fed on diets enriched with 0.0, 0.25, 0.5, 1.0, 3.0, 5.0, and 10.0 g CNP/kg diet for 8 weeks. After the feeding trial, fish were challenged against hypoxia stress or pathogenic bacteria (Aeromonas hydrophila) infection. Fish performance was significantly improved with increasing CNP levels over the control diet...
December 25, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29282001/nitrous-oxide-induced-subacute-combined-degeneration-with-longitudinally-extensive-myelopathy-with-inverted-v-sign-on-spinal-mri-a-case-report-and-literature-review
#13
Jun Liang Yuan, Shuang Kun Wang, Tao Jiang, Wen Li Hu
BACKGROUND: Nitrous oxide (N2O), a long-standing anesthetic, is also neurotoxic by interfering with the bioavailability of vitamin B12 if abused. A few case studies have reported the neurological and psychiatric complications of N2O. CASE PRESENTATION: Here, we reported a patient of N2O induced subacute combined degeneration (SCD) with longitudinally extensive myelopathy with inverted V-sign exhibiting progressive limb paresthesia and unsteady gait. CONCLUSIONS: This case raises the awareness of an important mechanism of neural toxicity of N2O, and clinical physicians should be well recognized this in the field of substance-related disorders...
December 28, 2017: BMC Neurology
https://www.readbyqxmd.com/read/29278565/nitrous-oxide-for-labor-analgesia
#14
Audrey Hellams, Taylor Sprague, Christina Saldanha, Mark Archambault
Inhaled nitrous oxide (N2O) has been used worldwide for over 100 years as labor analgesia but has not gained widespread use in the United States. Nitrous oxide provides a noninvasive option for laboring women. This article outlines its efficacy and safety as an analgesic compared with epidural and IV pain medications.
January 2018: JAAPA: Official Journal of the American Academy of Physician Assistants
https://www.readbyqxmd.com/read/29275808/from-dental-to-mental-institutions-asylum-bound-dentist-zacheus-rogers-oxygenates-nitrous-oxide
#15
Matthew L Edwards, George S Bause
American dentist Zacheus Rogers taught surgeon Edmund Andrews-and indirectly anesthesia pioneers SJ Hayes and FW Hewitt-to oxygenate anesthetics. Ironically, Rogers may have himself suffered neurologic damage by failing to oxygenate the nitrous oxide that he is speculated to have abused personally.
October 2017: Journal of Anesthesia History
https://www.readbyqxmd.com/read/29275807/precarious-distraction-and-carious-extraction-nitrous-oxide-during-the-second-world-billiards-tournament
#16
Sheng-Chieh Chang, George S Bause
During the 1879 Brunswick & Balke World Billiards Tournament, Manager FC Newhall had a tooth extracted under nitrous oxide administered by GQ Colton. The dental extraction occurred at the tournament site, New York City's Cooper Institute.
October 2017: Journal of Anesthesia History
https://www.readbyqxmd.com/read/29275805/from-dental-to-mental-institutions-did-hypoxic-anesthetics-by-dental-associations-add-more-brain-injured-patients-to-america-s-insane-asylums
#17
Matthew L Edwards, George S Bause
Though most patients survived the hypoxic challenge, some patients likely suffered asphyxial brain damage from GQ Colton's nitrous-oxide techniques and were admitted to insane or lunatic asylums.
October 2017: Journal of Anesthesia History
https://www.readbyqxmd.com/read/29275514/correction-to-cerebrovascular-co2-reactivity-during-isoflurane-nitrous-oxide-anesthesia-in-patients-with-chronic-renal-failure
#18
Kazuyoshi Ishida, Masato Uchida, Kohji Utada, Atsuo Yamashita, Satoshi Yamashita, Shiro Fukuda, Mishiya Matsumoto, Takefumi Sakabe
In the original publication of the article, the first sentence was published incorrectly under the section "Patients and preoperative assessment". The correct sentence should read as, "The Yamaguchi University Graduate School of Medicine Ethics Committee for Human Study approved the study protocol (18th August 2004: H16-71)".
December 23, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/29273063/nitrous-oxide-n2o-and-subsequent-open-label-ssri-treatment-of-adolescents-with-depression-notad-study-protocol-for-a-randomised-controlled-trial
#19
Richard M Stewart, Janice W Y Wong, Kevin C Runions, Pradeep Rao, Julia K Moore, Simon R Davies, Britta S von Ungern-Sternberg, David Sommerfield, Florian Daniel Zepf
BACKGROUND: The first line of pharmacological treatment for severe depressive disorders in young people is selective serotonin reuptake inhibitors (SSRIs). However, beneficial clinical effects are rarely observed before several weeks into treatment. Nitrous oxide (N2O) has a long-standing safety record for pain relief and has been used in adults and young people. In adults with severe treatment-resistant depression, a single dose of N2O had significant antidepressant effects, with maximum antidepressant effects observed 24 h after administration...
December 22, 2017: Trials
https://www.readbyqxmd.com/read/29259196/inhaled-nitrous-oxide-can-reduce-the-pain-perception-in-post-caldwell-luc-operation-patients-a-randomised-trial
#20
Ting Dong, Mingwen Liu, Kun Lv
To assess the efficiency of inhaled nitrous oxide (N2O) for the reduce the perception pain in extraction of iodoform gauze packing strips in post Caldwell-Luc operation patients. This randomized single blind trial included a total of 47 patients, aged between 14-82 years, in which undergoing radical maxillary sinusotomy. Based on the randomization procedure, patients were treated with (experimental) or without (control) inhaled N2O. The visual analogue scale scores (VAS scores) of the pain perception and the headache duration time were comparatively studied...
December 19, 2017: Scientific Reports
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