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Carbon Dioxide - Europe PMC

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Last Updated: 10 January 2023

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Acid shock protein Asr induces protein aggregation to promote E. coli O157:H7 entering viable but non-culturable state under high pressure carbon dioxide stress

The VBNC cells' ability to grow on a standard culture medium has decreased, but they are still alive and can be revived in appropriate conditions. The revived cells can absorb nutrients or produce toxins, contributing to food spoilage or human illness, posing a significant threat to food safety and public health. We discovered that HPCD produced a high number of asr genes, encoding an acid shock protein, during VBNC generation of E. coli O157:H7 by doing a comprehensive transcriptomic investigation. The cells were finally promoted to VBNC status after being joined by HPCD-initiated high expression of Asr and lower ATP production resulted in protein aggregation, which led to protein aggregation.

Source link: https://europepmc.org/article/MED/IND607936799


Total Carbon Dioxide (TCO 2 ) Concentrations in Thoroughbred and Quarter Racehorses in Louisiana.

Background The TCO 2 examination is carried out on the blood of racehorses as a way of combating the practice of administering alkalizing agents. In Thoroughbred and Quarter Horses, this research investigated serum TCO 2 levels and factors that may influence TCO 2 levels. TCO 2 concentrations in the median pre-race serum TCO 2 concentration was higher than those in post-race samples. The median TCO 2 values in pre-race samples were different between Thoroughbred and Quarter Horses, according to a survey conducted by the Thoroughbred and Quarter Horses. Seasonal temperature variation affected the total serum TCO 2 levels in Thoroughbred and Quarter Horse racehorses. The study's limitations were limited to a smaller sample size for post-race samples and Quarter Horse pre-race samples. It was not clear if the statistically significant differences in TCO 2 levels among racetracks in Louisiana were due to location of racetracks and/or seasonal temperature variation.

Source link: https://europepmc.org/article/MED/36621701


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 to the standard INVOS 5100Cu00ae cerebral oximeter. We carried out experiments during various levels of carbon dioxide pressure during hyper- and hypoventilation, as well as various variations of arterial oxygen saturation caused by variation of the inspiratory fraction of oxygen. Patients 39 and 20, respectively; an older version of the NeurOsu00ae oximeter with one bi-hemispherical sensor attached to the forehead's midline of the forehead's midline, and a newer version with two sensors attached to the left and right foreheads were used. During baseline conditions and after PaCO 2 had been randomly in- and decreased by changes in ventilation, and Variations in FiO 2 had been randomly modified by variations in FiO 2, Alternating measurements of ScO 2 with the INVOSu00ae oximeter and the NeurOsu00ae oximeter were carried out during baseline conditions and after PaCO 2 had been randomly modified by variations in FiO 2 were performed randomly. The particular investigation into the FiO 2's updates revealed a bias of -0. 8 percent, a lower limit of understanding of - 16. 3%, and upper limit of 14. 7%. 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 accuracy of NeurOsu00ae measurements to reflect changes in cerebral blood flow and cerebral oxygen balance into question.

Source link: https://europepmc.org/article/MED/36607531


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.

Background In a refractory out-of-hospital cardiac arrest, transportation to a hospital with continuous chest compressions from a chest compression device and ventilation with 100% oxygen through an advanced airway is common practice. Chest compressions were achieved with a Stryker Medical LUCASu00ae 2 mechanical chest compression unit. During the CPR, arterial blood gas samples were collected every 5 minutes for changes in lung aeration status, determined ventilation distribution during the CPR using electrical impedance tomography, and analyzed post-mortem computed tomography scans for differences in lung aeration status. CCC results The mHg group's median partial pressure of oxygen at 30 min was 110 mmHg for the 30:2 group and 70 mmHg for the CCC group. For the 30:2 group and the CCC group, the median partial pressure of carbon dioxide at 30 minutes was 70 mmHg and 68 mmHg. Through the intervention, we observed a trend worsening trend in PaO 2, EtCO 2 and MAP, as well as increasing PaCO 2 and lactate levels.

Source link: https://europepmc.org/article/MED/36607514


Structural modification of plum (Prunus domestica L) kernel protein isolate by supercritical carbon-dioxide treatment: Functional properties and in-vitro protein digestibility.

The effects of supercritical carbon dioxide treatment at various processing temperatures were investigated on plum kernel protein isolates' physico-chemical, structural characteristics, and in-vitro digestibility. The temperature rise brought the negative zeta potential to a maximum of 31. 35 mV at 60 ° C, demonstrating the coherence of PKPI dispersions. Moreover, at 60 u00b0C of the processing temperature, the highest IVPD value and a discernable colour difference of 8. 11 were also obtained. Hence, the increased digestibility and techno-functional properties of PKPI, which gave rise to new opportunities to use in food applications.

Source link: https://europepmc.org/article/MED/36621744


Comparison of Plasma Total Carbon Dioxide and Standard Hydrogen Carbonate in a Hospital Laboratory Setting.

TCO 2 and HCO 3 analyses were performed simultaneously by all patients with an HCO 3 - requisition from any Odense University Hospital between 11 th May 2021 and June 2021. HCO 2 and 22. 5 mmol/L for HCO 3 - a sample of 1210 patients. Means: 22. 9 mmol/L for tCO 2 and 22. 5 mmol/L for HCO 3 -. . HCO 3 was 10. 1-42. 3 mmol/L and 11. 7-41. 4 mmol/L. Bias between tCO 2 and HCO 3 was 0. 4 mmol/L with a 0-5. 0-9. 6 mmol/L range. Of the samples tested, 46. 1% showed a mean difference between tCO 2 and HCO 3 at 0-1 mmol/L and 30. 3% had 1. 1-2. 0 mmol/L, with 46. 1 percent being 1. 1-2. 0 mmol/L. Conclusions Our findings show that venous tCO 2 and venous HCO 3 can be used interchangeably in a hospital setting for workup of acid-base disorders.

Source link: https://europepmc.org/article/MED/36604776


Carbon dioxide hydrogenation over the carbon-terminated niobium carbide (111) surface: a density functional theory study.

We have investigated the adsorption geometries and energies of 25 different surface-adsorbed species, as well as estimates of all of the key steps in the CO 2 hydrogenation process. The theoretical results show that the NbC surface has higher catalytic activity toward CO 2 methanation, resulting in 4. 902 eV in electricity. All favourable hydrogenation reactions lead to desired compounds being produced by the dihydroxycarbene intermediate, except for the reaction that goes through HCOOH to produce CH 2 O. CH 3* hydrogenation to CH 4 * has the highest endothermic reaction energy of 3. 105 eV, according to eV's data, HCO dehydrogenation yields the highest exothermic reaction energy of -3. 049 eV.

Source link: https://europepmc.org/article/MED/36602090


Copper-based catalysts for the electrochemical reduction of carbon dioxide: progress and future prospects.

The present paper discusses fundamentals of the electrocatalytic CO 2 RR process as well as a systematic review of recent developments in Cu-based electrocatalysts for the electroreduction of CO 2 to various high-value multicarbon products.

Source link: https://europepmc.org/article/MED/36601800

* 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