The main source of CO2 is the burning fossil fuels like coal and oil. When this happens, carbon dioxide gets released into atmosphere.CO2 a colorless, odorless gas. It essential for life on Earth produced naturally by plants in process photosynthesis. releases atmosphere. not very soluble water, so it does dissolve easily seawater, making difficult to detect at sea.There are many benefits socie...

comin the present study, co2 removal from natural gas stream has been studied using a flat sheet membrane contactor. a three dimensional mathematical model is developed to describe the process. the model considers the transport of a gas mixture containing carbon dioxide and methane through a flat sheet membrane contactor module. the model is based on the non-wetted mode of operation, in which t...

We have demonstrated an improved synthesis of a cyclic carbonate of soybean oil (CSO) utilizing supercritical carbon dioxide (CO2) as the solvent. Because the mutual solubility of supercritical CO2 and soybean oil is significantly higher than that of gaseous CO2 and soybean oil, our method synthesizes the material in y1/3 of the reaction time reported in the literature. We have also demonstrate...

The effect of removal of resultant gas resulted in enhancement of the H2 yield. The technique of CO2 scavenging resulted in H2 yield being improved from 408 mL g(-1) to reach the maximum of 422 mL g'. The highest hydrogen productivity of 87.9 ml L(-1) h(-1) was obtained by CO2 scavenging. Biomass concentration was enhanced to 1.47 g L(-1), Y(P,X) of 287 ml g(-1) L(-1), Y(X/S) of 0.294 and Y(H2/...

Introduction Acidification of blood entering the membrane lung (ML) converts bicarbonate ions into dissolved gaseous CO2, increasing the pCO2 transmembrane gradient and thus the extracorporeal carbon dioxide removal (ECCO2R) [1]. Extracorporeal blood acidification has previously been achieved by infusion of lactic acid, which proved to be effective in rising ECCO2R but determined a mild increas...

BACKGROUND A non-invasive means of measuring pulmonary blood flow (PBF) would have numerous benefits in medicine. Traditionally, respiratory-based methods require breathing maneuvers, partial rebreathing, or foreign gas mixing because exhaled CO2 volume on a per-breath basis does not accurately represent alveolar exchange of CO2. We hypothesized that if the dilutional effect of the functional r...

We used the absorbance spectrum of the pH-sensitive dye dimethylcarboxyfluorescein to monitor intracellular pH (pHi) in the isolated perfused S3 segment of the rabbit proximal tubule, and examined the effect on pHi of switching from a HEPES to a CO2/HCO3- buffer in the lumen and/or the bath (i.e., basolateral solution). Solutions were titrated to pH 7.40 at 37 degrees C. With 10 mM acetate pres...

In this work, we illustrate a template strategy to create extra pores in microporous carbon for enhancing ambient-pressure CO2 uptake, as exemplified in the context of carbonizing the silicon-containing POP, PPN-4, followed by removal of the silicon template. The resultant PPN-4/C600 demonstrates a remarkable enhancement of CO2 uptake capacity at 295 K and 1 bar by a factor of 2.3 compared to t...

Extracorporeal CO2 removal devices (ECCO2R) can be used in clinics to decarboxylate blood externally for patients suffering from pulmonary insufficiencies like acute respiratory distress syndrome. In this work, we propose a model of the respiratory system coupled with such a device to analyze the decrease of CO2 partial pressure in the blood as a function of the blood flow through the device. T...

Melanocytic nevus is common pigmented skin tumor, but it has rare occurrence near the external auditory canal. A skin graft is required if a wide surgical excision is performed for the nevi occurring near the external auditory canal. A CO2 laser was considered to be a good alternative for the removal of melanocytic nevus in this area. We herein report a case of compound nevus occurring near the...