keyword
MENU ▼
Read by QxMD icon Read
search

Pco2

keyword
https://www.readbyqxmd.com/read/28540925/microorganisms-and-ocean-global-change
#1
REVIEW
David A Hutchins, Feixue Fu
The prokaryotic and eukaryotic microorganisms that drive the pelagic ocean's biogeochemical cycles are currently facing an unprecedented set of comprehensive anthropogenic changes. Nearly every important control on marine microbial physiology is currently in flux, including seawater pH, pCO2, temperature, redox chemistry, irradiance and nutrient availability. Here, we examine how microorganisms with key roles in the ocean carbon and nitrogen cycles may respond to these changes in the Earth's largest ecosystem...
May 25, 2017: Nature Microbiology
https://www.readbyqxmd.com/read/28539518/spatial-patterns-of-anchoveta-engraulis-ringens-eggs-and-larvae-in-relation-to-pco2-in-the-peruvian-upwelling-system
#2
Sara G Shen, Andrew R Thompson, Jonathan Correa, Peer Fietzek, Patricia Ayón, David M Checkley
Large and productive fisheries occur in regions experiencing or projected to experience ocean acidification. Anchoveta (Engraulis ringens) constitute the world's largest single-species fishery and live in one of the ocean's highest pCO2 regions. We investigated the relationship of the distribution and abundance of Anchoveta eggs and larvae to natural gradients in pCO2 in the Peruvian upwelling system. Eggs and larvae, zooplankton, and data on temperature, salinity, chlorophyll a and pCO2 were collected during a cruise off Peru in 2013...
May 31, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28539199/respiratory-severity-score-and-extubation-readiness-in-very-low-birth-weight-infants
#3
Maroun J Mhanna, Narayan P Iyer, Scott Piraino, Mohit Jain
BACKGROUND: The respiratory severity score (RSS) is a byproduct of mean airway pressure (MAP) and fraction of inspired oxygen (FiO2). We sought to determine whether RSS could be used as a screening tool to predict extubation readiness in very low birth weight (VLBW) infants. METHODS: In a retrospective cohort study, medical records of all VLBW infants admitted to our unit (6/1/09-2/28/12) were reviewed for infants' demographics, prenatal characteristics, and medication use...
May 10, 2017: Pediatrics and Neonatology
https://www.readbyqxmd.com/read/28534235/nasal-high-flow-in-management-of-children-with-status-asthmaticus-a-retrospective-observational-study
#4
Florent Baudin, Alexandra Buisson, Blandine Vanel, Bruno Massenavette, Robin Pouyau, Etienne Javouhey
BACKGROUND: Asthma is the most common obstructive airway disease in children and adults. Nasal high flow (NHF) is a recent device that is now used as a primary support for respiratory distress. Several studies have reported use of NHF as a respiratory support in status asthmaticus; however, there are no data to recommend such practice. We therefore conducted this preliminary study to evaluate NHF therapy for children with status asthmaticus admitted to our PICU in order to prepare a multicentre randomized controlled study...
December 2017: Annals of Intensive Care
https://www.readbyqxmd.com/read/28533577/the-interaction-between-trolox-and-4-4-diisothiocyanatostilbene-2-2-disulfonic-acid-on-hypoxic-pulmonary-vasoconstriction-in-the-isolated-rabbit-lung
#5
Somayh Mansoori, Seyed Mostafa Shid Moosavi, Farzaneh Ketabchi
BACKGROUND: The mechanism of hypoxic pulmonary vasoconstriction (HPV) is still debatable. It has been proposed that reactive oxygen species (ROS) might be involved in HPV. However, there is no special transporter for superoxide anion in the cell membrane and it may release from the cells via anion exchanger. Therefore, the aim of this study was to investigate the interaction of ROS and anion exchanger in acute HPV. METHODS: The present study was performed in the isolated rabbit lung...
May 2017: Iranian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28526118/effects-of-elevated-nutrients-and-co2-emission-scenarios-on-three-coral-reef-macroalgae
#6
Dorothea Bender-Champ, Guillermo Diaz-Pulido, Sophie Dove
Coral reef macroalgae are expected to thrive in the future under conditions that are deleterious to the health of reef-building corals. Here we examined how macroalgae would be affected by exposure to future CO2 emission scenarios (pCO2 and temperature), enriched nutrients and combinations of both. The species tested, Laurencia intricata (Rhodophyta), Turbinaria ornata and Chnoospora implexa (both Phaeophyceae), have active carbon-concentrating mechanisms but responded differently to the treatments. L. intricata showed high mortality under nutrient enriched RCP4...
May 2017: Harmful Algae
https://www.readbyqxmd.com/read/28522637/general-anesthesia-versus-conscious-sedation-for-endovascular-treatment-of-acute-ischemic-stroke-the-anstroke-trial-anesthesia-during-stroke
#7
Pia Löwhagen Hendén, Alexandros Rentzos, Jan-Erik Karlsson, Lars Rosengren, Birgitta Leiram, Henrik Sundeman, Dennis Dunker, Kunigunde Schnabel, Gunnar Wikholm, Mikael Hellström, Sven-Erik Ricksten
BACKGROUND AND PURPOSE: Retrospective studies have found that patients receiving general anesthesia for endovascular treatment in acute ischemic stroke have worse neurological outcome compared with patients receiving conscious sedation. In this prospective randomized single-center study, we investigated the impact of anesthesia technique on neurological outcome in acute ischemic stroke patients. METHODS: Ninety patients receiving endovascular treatment for acute ischemic stroke in 2013 to 2016 were included and randomized to general anesthesia or conscious sedation...
June 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28522141/venous-to-arterial-carbon-dioxide-difference-in-the-resuscitation-of-patients-with-severe-sepsis-and-septic-shock-a-systematic-review
#8
J J Diaztagle Fernández, J C Rodríguez Murcia, J J Sprockel Díaz
INTRODUCTION: The way to assess tissue perfusion during the resuscitation of patients with severe sepsis and septic shock is a current subject of research and debate. Venous oxygen saturation and lactate concentration have been the most frequently used criteria, though they involve known limitations. The venous-to-arterial difference of carbon dioxide (pCO2 delta) is a parameter than can be used to indicate tissue perfusion, and its determination therefore may be useful in these patients...
May 15, 2017: Medicina Intensiva
https://www.readbyqxmd.com/read/28516355/valve-movement-of-three-species-of-north-american-freshwater-mussels-exposed-to-elevated-carbon-dioxide
#9
Caleb T Hasler, Kelly D Hannan, Jennifer D Jeffrey, Cory D Suski
Freshwater mussels are at-risk taxa and may be exposed to high levels of carbon dioxide (CO2) because of the potential use of CO2 to control the movement of invasive aquatic fish species. One potential behavioral response to a change in the partial pressure of CO2 (pCO2) may be altered valve movement. In this study, three species of mussels were fitted with modified sensors and exposed to two regimes of pCO2 to define thresholds of impaired valve movement. The first experiment demonstrated that Pyganodon grandis were much more tolerant to rising pCO2 relative to Lampsilis siliquoidea (acute closure at ∼200,000 μatm in comparison to ∼80,000 μatm)...
May 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28511435/agreement-and-correlation-between-arterial-and-central-venous-blood-gas-following-coronary-artery-bypass-graft-surgery
#10
Masoumeh Esmaeilivand, Alireza Khatony, Gholamreza Moradi, Farid Najafi, Alireza Abdi
INTRODUCTION: Arterial blood sampling, used to assess patients in acute conditions, may result in complications such as thrombosis and embolism. However, it can be replaced by venous blood sampling, but there is a dearth of information on this. AIM: To assess the correlation and agreement between the arterial and central venous blood gases analyses in patients undergoing elective Coronary Artery Bypass Graft (CABG) surgery. MATERIALS AND METHODS: In this cross-sectional study, 100 ICU patients undergoing elective CABG surgery were recruited...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28510784/effects-of-acute-and-chronic-hypoxia-on-acid-base-regulation-hematology-ion-and-osmoregulation-of-juvenile-american-paddlefish
#11
Daniel L Aboagye, Peter J Allen
Despite the increasing prevalence of hypoxia in natural habitats occupied by the American paddlefish, basal bony fish, and ram ventilator, information about its response to hypoxia is scarce. To understand the physiological and biochemical responses of juvenile paddlefish (~150 g) to acute (<24 h) and chronic hypoxia (≥24 h), blood oxygen transport, blood acid-base balance, and metabolic stress were evaluated under four different partial pressures of oxygen [pO2; normoxia (148 mmHg), mild hypoxia (89 mmHg), moderate hypoxia (59 mmHg), and extreme hypoxia (36 mmHg)], all at 21 °C...
May 16, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28508039/naturally-acidified-habitat-selects-for-ocean-acidification-tolerant-mussels
#12
Jörn Thomsen, Laura S Stapp, Kristin Haynert, Hanna Schade, Maria Danelli, Gisela Lannig, K Mathias Wegner, Frank Melzner
Ocean acidification severely affects bivalves, especially their larval stages. Consequently, the fate of this ecologically and economically important group depends on the capacity and rate of evolutionary adaptation to altered ocean carbonate chemistry. We document successful settlement of wild mussel larvae (Mytilus edulis) in a periodically CO2-enriched habitat. The larval fitness of the population originating from the CO2-enriched habitat was compared to the response of a population from a nonenriched habitat in a common garden experiment...
April 2017: Science Advances
https://www.readbyqxmd.com/read/28507099/carbon-dioxide-dependent-regulation-of-nf-%C3%AE%C2%BAb-family-members-relb-and-p100-gives-molecular-insight-into-co2-dependent-immune-regulation
#13
Ciara E Keogh, Carsten C Scholz, Javier Rodriguez, Andrew C Selfridge, Alexander von Kriegshiem, Eoin P Cummins
CO2 is a physiological gas normally produced in the body during aerobic respiration. Hypercapnia (elevated blood pCO2 > ≈ 50mmHg) is a feature of several lung pathologies e.g. chronic obstructive pulmonary disease (COPD). Hypercapnia is associated with increased susceptibility to bacterial infections and suppression of inflammatory signaling. The NF-κB pathway has been implicated in these effects, however, the molecular mechanisms underpinning cellular sensitivity of the NF-κB pathway to CO2 is not fully elucidated...
May 15, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28502978/the-opioid-receptor-triple-agonist-dpi-125-produces-analgesia-with-less-respiratory-depression-and-reduced-abuse-liability
#14
Shou-Pu Yi, Qing-Hong Kong, Yu-Lei Li, Chen-Ling Pan, Jie Yu, Ben-Qiang Cui, Ying-Fei Wang, Guan-Lin Wang, Pei-Lan Zhou, Li-Li Wang, Ze-Hui Gong, Rui-Bin Su, Yue-Hai Shen, Gang Yu, Kwen-Jen Chang
Opioid analgesics remain the first choice for the treatment of moderate to severe pain, but they are also notorious for their respiratory depression and addictive effects. This study focused on the pharmacology of a novel opioid receptor mixed agonist DPI-125 and attempted to elucidate the relationship between the δ-, μ- and κ-receptor potency ratio and respiratory depression and abuse liability. Five diarylmethylpiperazine compounds (DPI-125, DPI-3290, DPI-130, KUST202 and KUST13T02) were selected for this study...
May 15, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28479147/effects-of-seawater-ph-and-temperature-on-foraging-behavior-of-the-japanese-stone-crab-charybdis-japonica
#15
Fangli Wu, Ting Wang, Shuaikang Cui, Zhe Xie, Sam Dupont, Jiangning Zeng, Huaxin Gu, Hui Kong, Menghong Hu, Weiqun Lu, Youji Wang
We examined prey selection and foraging behaviors of the crab Charybdis japonica exposed to four combinations of pH (7.3 and 8.1) and temperature (18°C and 25°C). The order of prey selection by C. japonica was Potamocorbula laevis, Ruditapes philippinarum, Tegillarca granosa and Mactra veneriformis. Under high pCO2, times for searching, breaking, eating and handling were all significantly longer than those at the normal pCO2, and the prey profitability and predation rate under high pCO2 were significantly lower than normal pCO2...
May 5, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28462732/anaesthesia-for-electroconvulsive-therapy-new-tricks-for-old-drugs-a-systematic-review
#16
Tobias Kvist Stripp, Martin Balslev Jorgensen, Niels Vidiendal Olsen
OBJECTIVE: The objective of this review is to investigate existing literature in order to delineate whether the use of anaesthesia and timing of seizure induction in a new and optimised way may improve the efficacy of electroconvulsive therapy (ECT). METHODS: PubMed/MEDLINE was searched for existing literature, last search on 24 June 2015. Relevant clinical studies on human subjects involving choice of anaesthetic, ventilation and bispectral index (BIS) monitoring in the ECT setting were considered...
May 2, 2017: Acta Neuropsychiatrica
https://www.readbyqxmd.com/read/28453380/lipids-on-the-second-day-in-ischemic-and-normoxemic-term-neonates
#17
Miljana Z Jovandaric, Tatjana V Nikolic, Svetlana Milenkovi, Biljana Otaševi, Violeta V Bankovic, Petar I Ivanovski, Milos M Jesic
INTRODUCTION: In hypoxic newborns requiring oxygen, lipid peroxidation affects the peripheral blood lipids. OBJECTIVES: Determine the influence of perinatal oxygen therapy for hypoxia on serum lipid concentrations on the second day of life. MATERIALS AND METHODS: Our study included 50 newborns with perinatal hypoxia requiring oxygen and 50 healthy newborns without oxygen therapy. Arterialized capillary blood was taken for categorization of hypoxia (pO2) after birth in both groups...
April 28, 2017: Fetal and Pediatric Pathology
https://www.readbyqxmd.com/read/28446693/lipid-consumption-in-coral-larvae-differs-among-sites-a-consideration-of-environmental-history-in-a-global-ocean-change-scenario
#18
Emily B Rivest, Chii-Shiarng Chen, Tung-Yung Fan, Hsing-Hui Li, Gretchen E Hofmann
The success of early life-history stages is an environmentally sensitive bottleneck for many marine invertebrates. Responses of larvae to environmental stress may vary due to differences in maternal investment of energy stores and acclimatization/adaptation of a population to local environmental conditions. In this study, we compared two populations from sites with different environmental regimes (Moorea and Taiwan). We assessed the responses of Pocillopora damicornis larvae to two future co-occurring environmental stressors: elevated temperature and ocean acidification...
April 26, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28445779/the-acute-cardiorespiratory-effects-of-centrally-injected-arachidonic-acid-the-mediation-of-prostaglandin-e-d-and-f2%C3%AE
#19
Leman Gizem Erkan, Burcin Altinbas, Gokcen Guvenc, Begum Aydin, Nasir Niaz, Murat Yalcin
Arachidonic acid (AA), which is released from synaptic membrane phospholipid by neuroreceptor-initiated activation of phospholipase A2, is abundant in the brain and works as a neurotransmitter and/or neuromodulator in the central nervous system. Recently we reported that centrally injected AA generated pressor and hyperventilation effects by activating thromboxane A2 (TXA2) signaling pathway. The present study was designed to investigate the mediation of other metabolites of AA such as prostaglandin (PG) D, PGE and PGF2α alongside TXA2 in the AA-evoked cardiorespiratory effects in anaesthetized rats...
April 23, 2017: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/28437707/effect-of-pco2-on-direct-flue-gas-mineral-carbonation-at-pilot-scale
#20
Ikbel Mouedhen, Nassima Kemache, Louis-César Pasquier, Emmanuelle Cecchi, Jean-François Blais, Guy Mercier
Concerns about global warming phenomena induced the development of research about the control of anthropogenic greenhouse gases emissions. The current work studies on the scaling up of aqueous mineral carbonation route to reduce the CO2 emissions at the chimney of industrial emitters. The reactivity of serpentinite in a stirred tank reactor was studied for several partial pressures of CO2 (pCO2) (0.4, 0.7, 1.3 and 1.6 bar). Prior to carbonation, the feedstock was finely grinded and dehydroxyled at 650 °C by a thermal treatment...
April 21, 2017: Journal of Environmental Management
keyword
keyword
6542
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"