Synchrotron x-ray and surface-tension studies of a strong polyelectrolyte (PE) in the semidilute regime (approximately 0.1 M monomer charges) with varying surfactant concentrations show that minute surfactant concentrations induce the formation of a PE-surfactant complex at the gas-solution interface. X-ray reflectivity and grazing angle x-ray diffraction show the complex PE-surfactant resides ...

Deep complex oil and gas reservoirs are the future directions of exploration. The exploration potential Paleocene deposits in Lufeng sag is enormous. However, due to greater burial depth accumulation conditions Paleocene, few large-scale have been discovered next strategy unclear. In this study, based on geological data Southern sag, a model hydrocarbon functional element control constructed us...

Synthetic surfactants allow examination of the effects of specific components of natural surfactant. To determine whether surfactant containing apoprotein C, dipalmitoyl-phosphatidylcholine, phosphatidylglycerol, and palmitic acid restores gas-exchanging function in acute lung injury (ALI), we administered such surfactant (in doses of 50 or 100 mg/kg and in volumes from 1 to 6 ml/kg) or phospho...

CPAP is the most studied form of noninvasive ventilation in neonates, and early investigations focused on the use of CPAP following surfactant administration, to minimize the need for invasive mechanical ventilation.1 Verder and colleagues demonstrated that a strategy of CPAP following brief intubation and surfactant administration (the INSURE technique: INtubation, SURfactant, Extubation) impr...

this paper presents a control strategy for fuel cell/energy storage power generation system during voltage sag conditions. the hybrid dc power sources are connected to grid using power electronic converters include dc-dc converter and grid connected voltage source inverter. the power from hybrid power sources is controlled during voltage sag by designing of control strategy for dc-dc converter....

In the lungs, oxygen transfer from the inspired air to the capillary blood needs to cross the surfactant lining layer of the alveoli. Therefore, the gas transfer characteristics of lung surfactant film are of fundamental physiological interest. However, previous in vitro studies-most relied on the Langmuir-type balance-fail to cover the low surface tension range (i.e., less than the equilibrium...

Oxidative damage to surfactant can decrease lung function in vivo. In the current study, our two objectives were: 1) to examine whether the adverse effects of oxidized surfactant would be accentuated in animals exposed to high tidal volume ventilation, and 2) to test whether supplementation with surfactant protein A (SP-A) could improve the function of oxidized surfactant in vivo. The first obj...

Nitrogen dioxide (NO2) is a ubiquitous, pollutant gas that produces a broad range of pathological and physiological effects on the lung. Absorption of inhaled NO2 is coupled to near-interfacial reactions between the solute gas and constituents of the airway and alveolar epithelial lining fluid. Although alveolar surfactant imparts limited resistance to respiratory gas exchange compared with tha...

The main objective of this work was to prepare nanosized titania (TiO2) particles by mixed reverse microemulsion route. In this work titania was prepared by quaternary microemulsion system (water/surfactant/co-surfactant/ oil-phase). Span-80, Aerosol-OT, n-Propanol, Isooctane, and Titanium tetra isopropoxide (TTIP) were used as surfactant, co-surfactant, oil-phase and titania precursor respecti...

Gas hydrates were newly discovered in the Dongsha Waters of South China Sea by drilling 2013 and 2019. The results show that consist microbial gas thermogenic gas, but source layers are not clear. Chaoshan depression is largest relict Mesozoic basin under where thick T 3 —K strata, up to 5000 m, have developed thin Cenozoic sediments. —J 1 J bear two main hydrocarbon rocks rich II 2 -III type o...