Ammonia was used for the major absorbent while sodium hydroxide was used as a reference in either a bubble column (semi-batch reaction) or a packed tower (continuous reaction) to absorb CO2 in this study. In the bubble column, bubbling time as a function of temperature, pH, and dissolved inorganic carbon concentration in the solution was measured to see the characteristics of the reaction and t...

A respiratory catheter that is inserted through a peripheral vein and placed within the vena cava is being developed for CO2 removal in patients with acute exacerbations of chronic obstructive pulmonary disease (COPD). The catheter uses a rapidly pulsating balloon to enhance gas exchange. In this study, the CO2 removal performance of our catheter was assessed in acute sheep implants and compare...

Objective: Large central disc herniation is not common. Generally, wide and aggressive surgery is required for total disc removal. But, wide decompression such as total laminectomy for adequate disc removal may have risk of spinal instability. Methods: We operated on large central disc herniation by microsurgical Bilateral Discectomy via a Unilateral Approach (BDUA). With modification of this t...

Three kinds of apparatus of CO2 laser, that is, Medilaser S, NIIC Lasery 60 and NIIC Lasery Model 60Z, are used in our institute. Two kinds of apparatus of Nd-YAG laser, that is, Molectron Model 8000 and Medilas are utilized also. We have used CO2 lasers for removal of tumors in 75 brain tumor cases and 9 spinal cord tumor cases. CO2 lasers were also used for hemostasis in the muscle layer and ...

Plasma remediation is being investigated for the removal of oxides of nitrogen (NxOy) from atmospheric pressure gas streams. In previous works we have investigated the plasma remediation of NxOy from N2 /O2 /H2O mixtures using repetitively pulsed dielectric barrier discharges. As combustion effluents contain large percentages of CO2, in this paper we discuss the consequences of CO2 in the gas m...

The kinetics of inactivation of the Zn2+-metalloenzyme acyl-amino acid amido hydrolase by chelating ligands were studied. The rate of inactivation by 1,10-phenanthroline is enhanced by histidine and inhibited in the presence of phenyl-alanine. Removal of the metal ion increases the heat stability and decreases the pH stability of the enzyme. Reactivation of the inactive metal free enzyme is pos...

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...

introduction: there are two types of japanese persimmon (diospyros kaki thunb.), astringent and non-astringent, based on the degree of astringent taste at maturity state. fruits of either type are strongly astringent when small and immature, but non-astringent type loses its astringency during development on the tree, still with firm flesh. however, the astringent type keeps its astringency and...

A field study was conducted to assess the effects of soil tillage practices and straw management on soil CO2, and yield-scaled CO2 emissions in a rain-fed summer corn field on the Loess Plateau. Tillage treatments consisted of sub-soiling tillage (CP), no tillage (NT) and moldboard plow tillage (CT). Wheat straw was removed from half of the CP, NT and CT plots after harvest, allowing us to test...

Life cycle analysis on wood-based panels in terms of CO2 flux can be used to quantitatively assess the climate change contributions of these materials. In this study, the annual CO2 flux between 1990 and 2015 was calculated through gate-to-gate life cycle analysis of wood-based panels. As implied by the energy consumption standards, China’s wood-based panels used to be carbon sources during the...