Advanced searches left 3/3

Carbon Dioxide - DOAJ

Summarized by Plex Scholar
Last Updated: 10 September 2022

* If you want to update the article please login/register

In-Line Monitoring of Carbon Dioxide Capture with Sodium Hydroxide in a Customized 3D-Printed Reactor without Forced Mixing

Because sodium is the fifth most abundant metal and the seventh most abundant element on Earth, many industrial processes make use of sodium. Nevertheless, the literature on aqueous NaOH's CO 2 absorption capacity is insufficient for making a fair comparison to sodium-containing waste. The CO2 absorption capacity of NaOH solutions in a concentration range of 1 to w/w % was evaluated, which was a larger range compared to previously available results, filling the void and setting the tone for future research on carbon capture. The information presented here helps evaluate the results of sodium-based wastes, which are often complex mixtures and can contain other substances that improve or exacerbate their carbon capture capability. A pH meter and an FTIR probe in-line were used to determine CO 2 absorption capacity and carbon formation progress.

Source link: https://doi.org/10.3390/su141710795


Long-Term US Economic Growth and the Carbon Dioxide Emissions Nexus: A Wavelet-Based Approach

Carbon dioxide emissions in the global economy have greatly increased due to economic growth. This paper explores the short-/long-term causal correlation between fossil-fuel-related carbon dioxide emissions and economic growth in the U. S. economy, spanning from 1800 to 2014. The empirical findings indicate that the long-run causal information flow from GDP to CO 2 has been positive, continuous, and concentrated since the 1990s; the reverse causality transition is positive, but short-term and peaking during the early 1990s. Hence, sustainable economic growth policies are set to decelerate environmental degradation and foster environmental sustainability.

Source link: https://doi.org/10.3390/su141710566


New Strategies on Green Synthesis of Dimethyl Carbonate from Carbon Dioxide and Methanol over Oxide Composites

Dimethyl carbonate is a commonly used chemical product that is environmentally friendly in nature and used in a variety of industrial applications as intermediate. Green manufacturing of DMC from CO 2 and methanol is the most cost-effective and eco friendly option. Electron-assisted activation of CO 2 and membrane reactors, which can distinguish products in real-time and yield a maximum yield of DMC, are now being used in the search for a more efficient production method. We deeply discussed green production techniques of DMC in this review paper, using Zr/Ce/Cu-based nanocomposites as catalysts.

Source link: https://doi.org/10.3390/molecules27175417


Determinants of Arterial Pressure of Oxygen and Carbon Dioxide in Patients Supported by Veno-Arterial ECMO

Background: In the initial phase of veno-arterial extracorporeal membrane oxygenation assistance, the present research sought to determine the determinants of arterial partial pressures of oxygen and carbon dioxide. Despite the fact that the guidelines addressed both hypoxemia and hyperoxemia as part of ECMO assistance, there is a lack of information regarding the patients covered by VA ECMO. The blood samples were obtained simultaneously from the right radial artery catheter, VA ECMO venous line, and the VA ECMO arterial line for each timepoint. The patientsu2019 PaO 2 was independently associated with Q EC, F D O 2, and time of measurement in a multivariate study. Preferred CO 2 and the sweep rate flow were both associated with the P pre CO 2 and the sweep rate flow. Conclusions: The main determinants of patient oxygenation determination in acute VA ECMO support are determined by VA ECMO parameters.

Source link: https://doi.org/10.3390/jcm11175228


Fractional Carbon Dioxide Laser Improves Vaginal Laxity via Remodeling of Vaginal Tissues in Asian Women

The treatment of VL has a growing demand for Vaginal fractional carbon dioxide laser therapy, but data shows nonconformities as a result of a lack of objective measurements. Objective approaches were used in this research to demonstrate the medical and biophysical benefits of fractional CO 2 laser therapy for VL patients. Results: After the first and second treatment sessions, the overall FSFI scores and VHIS scores were much higher than the baseline averages. Conclusions: Fractional CO 2 vaginal laser therapy can improve both vaginal health and sexual function, as well as vaginal biomechanical functionality, as well as restoring vaginal tissue tightening and improving vaginal tissue integrity in Asian women. Our results show that the fractional CO 2 vaginal laser, which is a safe treatment strategy for VL.

Source link: https://doi.org/10.3390/jcm11175201


Do Factor Market Distortions and Carbon Dioxide Emissions Distort Energy Industry Chain Technical Efficiency? A Heterogeneous Stochastic Frontier Analysis

We use a heterogeneous frontier model to investigate the consequences of factor market disruptions and carbon dioxide pollution on economic growth and to assess the Chinese energy industry's chain's technical performance under the influence of factor shifts and carbon dioxide emissions. As a result of carbon dioxide emissions, the counterfactual measurement technique is used to determine the factor market shifts and loss of energy sector chain technology as a result of carbon dioxide emissions. The main analysis results show that China's energy technology efficiency is 0. 959, and the average energy industry chain technology efficiency for each region, from the highest to the lowest, are east, center, northeast, and west. Although the energy industry chain's technological effectiveness is subjected to market conditions, sustainable growth's structural reasons are more apparent.

Source link: https://doi.org/10.3390/en15176154


Experimental Investigation on Heat Transfer and Pressure Drop of Supercritical Carbon Dioxide in a Mini Vertical Upward Flow

The peak of heat transfer occurs when the bulk fluid temperature is below the predicted critical temperature is below the recommended critical temperature, and the wall temperature is above the suggested maximum temperature. For convective heat transfer, a new modified Jackson correlation for the supercritical carbon dioxide is suggested in this research. To reflect the effects of flow acceleration on heat transfer, a dimensionless heat flux was introduced to create a new semi-correlation of heat transfer.

Source link: https://doi.org/10.3390/en15176135


Higher body mass index is associated with worse hippocampal vasoreactivity to carbon dioxide

MethodhodsThis research was a retrospective review of prospectively collected data in a group of cognitively healthy middle-aged and older adults. Subjects were accepted for studies investigating the role of hippocampal hemodynamics as a biomarker of AD among cognitively healthy elderly adults. Results According to BMI and brain measurements, correlations between BMI and brain measurements were tested using linear regression. After excluding subjects with diabetes and insulin resistance, a similar relationship was observed. BMI was more closely related to hippocampal CVRCO2 in women in the entire population, and the recommendation of targeting obesity as a risk factor for hippocampal hemodynamic dysfunction is backed up by the studies. Prospective studies investigating the effects of weight loss on brain hemodynamic measurements and inflammation are warranted.

Source link: https://doi.org/10.3389/fnagi.2022.948470


Negative erosion and negative emissions: Combining multiple land-based carbon dioxide removal techniques to rebuild fertile topsoils and enhance food production

Carbon dioxide removal that raises the area of forest cover or bio-energy crops inherently competes for land with crop and livestock production, compromising food security, or will encroach natural lands, jeopardizing wildlife. Mass deployment of these terrestrial CDR technologies to combat climate change is therefore unlikely to be achieved without a significant increase in agricultural production, i. e. , growing more food on less land, which would lead to climate change. CDR methods such as enhanced silicate weathering, biochar reform, and soil carbon sequestration can prevent this competition for land and may also result in multiple co-benefits for food production. This paper discusses the potential to push these latest CDR technologies a step farther and use them not only to remove CO2 from the atmosphere but also to re-establish fertile soils in areas that suffer from widespread land degradation but also have sufficient water available for agriculture.

Source link: https://doi.org/10.3389/fclim.2022.928403


Comparison of arterial to end-tidal carbon dioxide gradient P (a-ET)CO2 in volume versus pressure controlled ventilation in patients undergoing robotic abdominal surgery in the Trendelenburg position. A randomised controlled study

In patients undergoing robotic surgery in Trendelenburg, the main aim was to determine the effect of two ventilatory techniques, volume versus pressure-controlled ventilation on the arterial to end-tidal carbon dioxide gradient P CO2 gradient. P CO2 was measured at baseline T0, 10 min after Trendelenburg's position T1, T2, 4 h T3 and Te, ten min after deflation. P CO2 at T1, T2, T3, and Te was lower in Group PCV compared to Group VCV, which was lower. At T1, T2, and T3 and Cdyn, the Paw was thinner at T1, T2, T3, and Cdyn, which were both higher at T3 and Te in Group PCV at comparable minute ventilation at comparable minute ventilation at similar minute ventilation. Both Haemodynamics and P O2 were similar between the two groups. Conclusion: Pressure-controlled ventilation in robotic surgery in Trendelenburg increases P CO2 gradient, Paw, and improves Cdyn, but does not have an effect on P O2 or haemodynamics in comparison to volume-controlled ventilation in robotic surgeries.

Source link: https://doi.org/10.4103/ija.ija_902_21

* 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