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Carbon Dioxide - Springer Nature

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Last Updated: 10 January 2023

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Comparison of Reduced-Salt Fish Sauces Produced Under Pressurized Carbon Dioxide Treatment From Sardinops melanostictus, Trachurus japonicus, Konosirus punctatus, Odontamblyopus lacepedii, and Their Mixture

During fish sauce production, high salt levels can inhibit the formation of undesirable microorganisms. Herein, pressurized CO_2 was used during fish sauce fermentation to discourage microbial growth in fish sauce with reduced salt. FS_CO_2 FS CO 2 assimilated the flavor of fish sauces made from different fish species based on taste sensors and odor compounds made by taste testing by using taste sensors and odor compounds by gas chromatography. FS_CO_2 FS CO 2's overall success resulted in the production of reduced-salt fish sauce with improved consistency, regardless of the fish species.

Source link: https://doi.org/10.1007/s11947-022-02920-2


Ventilation during continuous compressions or at 30:2 compression-to-ventilation ratio results in similar arterial oxygen and carbon dioxide levels in an experimental model of prolonged cardiac arrest

Methods We randomized 30 anaesthetized domestic swine with electrically induced ventricular fibrillation to the CCC or 30:2 group and bag-valve ventilation with just a small amount of inspired oxygen to 100%. Chest compressions were performed with a Stryker Medical LUCASu00ae 2 mechanical chest compression unit. During the CPR, we obtained arterial blood gas samples every 5 minutes, documented ventilation delivery during the CPR using electrical impedance tomography, and reviewed post-mortem computed tomography scans for differences in lung aeration status. Conclusions The CCC group had the highest partial pressure of oxygen at 30 minutes and the 30:2 group had 110 mmHg, while the CCC group had 70 mmHg. Carbon dioxide at 30 minutes was 70 mmHg for the 30:2 group and 68 mmHg for the CCC group, respectively.

Source link: https://doi.org/10.1186/s40635-022-00485-0


A comparison of the NeurOs® and the INVOS 5100C® cerebral oximeter during variations of the partial pressure of carbon dioxide and fractional inspiratory concentration of oxygen

This prospective method comparison study compared cerebral oxygen saturation measurement results of the new cerebral oximeter with the standard INVOS 5100Cu00ae cerebral oximeter. We conducted experiments under various degrees of carbon dioxide pressure during hyper- and hypoventilation, as well as different levels of arterial oxygen saturation induced by variation of the inspiratory fraction of oxygen. During hemodynamically stable conditions, 59 anesthetized cardiac and vascular surgical patients were analyzed during hemodynamically stable conditions. In 39 and 20 patients, respectively, an older version with one bi-hemispherical sensor attached to the forehead's midline of the forehead and a newer one with two sensors attached to the left and right foreheads were used. During baseline conditions and after PaCO_2 had been randomly in-and down by changes in ventilation and SaO_2 were randomly modified by FiO_2 variations, Alternating measurements of ScO_2 with the INVOSu00ae oximeter and the NeurOsu00ae oximeter were carried out under baseline conditions and after PaCO_2 had been randomly adjusted by variations in FiO_2 were performed randomly, and then changed by variations in FiO_2's a bias of u2212 0. 8%, which was below the lower limit of agreement of u2212 16. 3% and upper limit of 14. 7% was revealed during the respective review during SaO_2's update. During variations of ventilation and oxygenation in elective cardiac or vascular surgical patients, the NeurOsu00ae cerebral oximeter is not interchangeable with the INVOSu00ae cerebral oximeter. The lack of reactivity to changes in ventilation and oxygen delivery put the validity of NeurOsu00ae measurements to reflect changes in cerebral blood flow and cerebral oxygen balance in uncertain manner.

Source link: https://doi.org/10.1007/s10877-022-00963-6


Experimental study on supercritical carbon dioxide gasification of biomass

With the increased usage of fossil energy and concern for environmental sustainability, biomass gasification as an efficient means of biomass energy utilization has received brisk attention around the world. Carbon dioxide gasification of biomass can be a promising technology due to near-liability and high solubility, as well as supercritical carbon dioxide gasification of biomass. Experimental findings showed that with increasing temperature, reaction time, or the amount of carbon dioxide, biomass gasification efficiency of biomass gasification increased with increasing temperature, reaction time, or the amount of carbon dioxide. As the CO2 atmosphere increased from 700 °C to 900 b/c, the gas yield leapt from 23. 53 to 50. 24 mol/kg biomass and CE increased from 43. 53 percent to 94. 3 percent in a CO_2 atmosphere at 30 min. The gas yield increased from 23. 72 to 50. 24 mol/kg biomass with the change of the equivalent ratio from 0 to 1 at 900 b0C and 30 mins.

Source link: https://doi.org/10.1007/s43979-022-00043-3


Methane emissions offset atmospheric carbon dioxide uptake in coastal macroalgae, mixed vegetation and sediment ecosystems

These habitats produce CH_4 emissions from the atmosphere, with one descending methanogenic archaea in anoxic microsites. Here we show that these habitats emit CH_4 in the range of 0. 01 to u22121. Carbon sink capacity increase, along with an annual cycle, increases net CO_2 emissions offset 28 and 35% of the carbon sink capacity attributed to atmospheric CO_2 uptake in the macroalgae and mixed vegetation habitats, respectively, and increase net CO_2 release of unvegetated sediments by 57%. As net atmospheric carbon sinks and develop effective climate mitigation strategies, estimating CH_4 alongside CO_2 sea-air fluxes and determining the mechanisms controlling these emissions is vital to constrain coastal ecosystems as net atmospheric carbon sinks and establish informed climate mitigation strategies. Natural methane emissions in a variety of vegetated and unvegetated coastal habitats, according to the authors, can offset one-third of the carbon sink capacity attributed to atmospheric carbon dioxide uptake.

Source link: https://doi.org/10.1038/s41467-022-35673-9


An eco-friendly method of extracting alizarin from Rubia tinctorum roots under supercritical carbon dioxide and its application to wool dyeing

Supercritical carbon dioxide is the most commonly used supercritical fluid extraction process due to its low critical temperature and pressure values. 1. 34 g/kg roots and 6. 2%, respectively, as indicated by the alizarin recovery and its content in R. tinctorum extract under ideal conditions. Wool fabrics were dyed with RE at different concentrations using traditional dyeing techniques. Based on RE content and mordant type, dyed wool fabrics' color and fastness characteristics were determined.

Source link: https://doi.org/10.1038/s41598-022-27110-0


An IoT-Based System to Measure Methane and Carbon Dioxide Emissions Along with Temperature and Humidity in Urban Areas

The measured results were then sent into the ThingSpeak cloud server and then made available for visualization in the next step. This research seeks to determine the amount of methane and carbon dioxide emissions that have a major effect on rising temperature and humidity, as well as identifying some challenges to integrating modern sensors based on the introduction of the Internet of things concept. However, the cloud server's logs can be used for further analysis to determine other effects of gasses in our environment.

Source link: https://doi.org/10.1007/978-981-19-3035-5_48


Shock Tube Performance Studies with Argon and Carbon Dioxide Using Unsteady Numerical Simulation

This research is designed to determine the effectiveness of the shock tube with argon and carbon dioxide as a working fluid using unsteady numerical simulations. Simulations were carried out for various diaphragm ratios to determine the dependence on the incident shock wave, shock Mach number, and temperature of the reflected shock wave. The new driver/driven gas model has a huge advantage in shock Mach number of 4. 7 at lower diaphragm pressure ratios, as well as significant shifts in the temperature of shocked gas and temperature behind the reflected shock wave.

Source link: https://doi.org/10.1007/978-981-16-8274-2_22


Carbon Dioxide Emissions at the Peatland in Oil Palm Plantations: Groundwater, Subsidence, and Climate

Land clearing for oil palm plantations is believed to have influenced the increase of carbon dioxide in the atmosphere. The influence of groundwater depth, subsidence rate, and atmosphere on the CO_2 emissions in peatland from oil palm plantations was determined by this report. That indicated that the highest CO_2 emissions measured in the groundwater depths 0. 6 meters of 39. 82 ton hau22121 year u22121. With r2=0. 206, the groundwater depth significantly raises the value of CO_2 emissions at the peatlands in oil palm plantations' peatlands. The deeper groundwater depth in peatlands resulted in more CO2 emissions that were then increased.

Source link: https://doi.org/10.2991/978-2-494069-33-6_38

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions