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Gas - Europe PMC

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Last Updated: 03 July 2022

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Effects of Gas Embolism on Pulsatile Flow Characteristics Within a Human Carotid Artery.

In an anatomical image-based geometry with flow conditions closely approximating physiological flows, one understands how gas embolism affects carotid artery hemodynamics, and numerical simulation of coupled Newtonian two-phase laminar flow with interface monitoring is carried out. To determine how gas embolism affects carotid artery hemodynamics, numerical simulation of coupled Newtonian two-phase laminar flow is performed. Leading to nonstandard flow distributions, a significant difference from flow without gas embolism has been observed. Gas embolism contributes to elevated time averaged shear stress values and larger areas of high oscillatory shear index in the carotid artery hemodynamics, leading to increased risk of atherosclerosis risk, according to higher probability of atherosclerosis incidence and greater areas of high oscillatory shear index.

Source link: https://europepmc.org/article/MED/35643820


Water‐use efficiency and greenhouse gas emissions of rice affected by water saving and nitrogen reduction

In double-u2010cropping rice, we investigated the effects of reduced irrigation and N application, using green manure and rice straw, on the water'u2010use effectiveness and greenhouse gas emissions of machineu2010transplanted rice, providing theoretical and scientific guidance for water and N management. Later this year, early and late season rice production in CHu2084 increased by 14. 54 percent and 24. 5 percent, respectively, while flood irrigation increased by 12. 50 percent and 23. 08 percent, respectively. According to W1N1's treatment, early and late rice intakes decreased by 4. 40 percent and 5. 53 percent, respectively, although yield and WUE increased by 4. 8 percent and 9. 71%. The introduction of green manure and rice straw in double rice cropping systems reduced water use and increased grain yield while also raising GHG emissions, which led to increased GHG emissions.

Source link: https://europepmc.org/article/MED/IND607715303


Greenhouse gas mitigation strategies and opportunities for agriculture

The agricultural sector has a unique opportunity to achieve sustainable growth goals set by the United Nations by innovative and regenerative agriculture methods that increase agricultural production, feed, and energy, as well as environmental challenges due to climate change. We use the greenhouse gas emissions from agriculture as a primary environmental indicator in determining several GHG mitigation strategies applied to agriculture among many sustainability and contribution to agriculture's progress and contribution to its improvements among many sustainability and development metrics used to measure agriculture's impacts on sustainability and contribution to its advancements.

Source link: https://europepmc.org/article/MED/IND607715265


Anesthetic gas consumption with target-controlled administration versus a semi-closed circle system with automatic end-tidal concentration control in an artificial lung model.

We compared anesthetic gas consumption of the conventional semi-closured Aisys CS TM with the MIRUS TM system, the first anesthetic gas reflector system to administer desflurane in comparison to isoflurane and sevoflurane. We connected an artificial lung model to either a MIRUS TM unit and a Puritan Bennett TM 840 ventilator or an Aisys CS TM anesthesia unit. At FGF 2. 5 L/min, MIRUS TM consumption of 1% sevoflurane was averaged to 10 mL/h, which corresponds to 8. 4 mL/h. Therefore, the MIRUS TM system can safely deliver volatile anesthetics in physiologically relevant concentrations in a similar manner as a conventional circular breathing system with FGFs between 1. 0 L/min and 2. 5 L/min.

Source link: https://europepmc.org/article/MED/35435423


Effect of information-driven irrigation scheduling on water use efficiency, nutrient leaching, greenhouse gas emission, and plant growth in South Florida

For improved irrigation sustainability, we evaluated the results of different irrigation scheduling techniques related to water conservation, water quality protection, and greenhouse gas emission for increased irrigation efficiency. Four irrigation scheduling strategies were used: two conventional methods and two information-driven approaches based on soil water sampling and modeling. This research showed that soil water sensing and modeling could improve irrigation's availability by reducing water use and nutrient losses to the aquifer while also maintaining agricultural productivity.

Source link: https://europepmc.org/article/MED/IND607707549


Hydrogen enriched 'Maroon Gas' and 'Pink Hydrogen'

In an optimal manner, the key idea is the removal of hydrogen from water in lieu of that from the hydrocarbon in a cost-effective manner. When it comes to generating electricity via combustion, this has a greater water vapor to CO2 exhaust ratio than traditional carbonaceous fuels, a necessary step toward achieving Netzero goals in a shorter time and energy independence in most regions. Concentrated CO2 is then available for use or sequestration depending on the process of manufacture.

Source link: https://europepmc.org/article/PPR/PPR512958


Gas-Phase Ozone Reaction Kinetics of C 5 -C 8 Unsaturated Alcohols of Biogenic Interest.

Unsaturated alcohols are volatile organic compounds that characterize plant emissions. Ozonolysis is one of the oxidation pathways that control the fate of unsaturated alcohols in the atmosphere. At 296 K using both absolute and relative kinetic methods, the rate coefficients of the gas-phase O3 reaction with seven C 5 -C 8 unsaturated alcohols were determined. According to cis -3-hexen-1-ol, u00d7 10 -17 for trans -2-hexen-1-ol, u00d7 10-17 for trans -3-hexen-1-ol, u00d7 10-17 for trans -3-hexen-1-ol, u00d7 10-17 for trans -3-hexen-1-ol, u00d7 10 -17 for trans v ol, -3-hexen-1-ol, ol, -3-ol, -2-ol, ol, -1-ol, hexen-1-ol, ol, -3-ol, hexen-1-ol, ol, -3-ol, -3-hexen-1-ol, hexen-1-ol, -2-ol, -17 for trans -3-ol, -17 for trans -1-ol, -3- Alkenols' ozone reactivities with lifetimes in the hour range have been high. Rate coefficients reveal a significant and complicated dependence on the alkenol's overall alkenol's composition, particularly the OH group's relative position toward the Cu2550C double bond.

Source link: https://europepmc.org/article/MED/35776765

* 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