Chemical vapor transport (CVT) reactions were used to prepare three modular mixed-valent Cu(I)-Cu(II) compounds, (Pb2Cu(2+)9O4)(SeO3)4(Cu(+)Cl(2))Cl5 (1), (PbCu(2+)5O2)(SeO3)2(Cu(+)Cl2)Cl3 (2), and (Pb(x)Cu(2+)(6-x)O2)(SeO3)2(Cu(+)Cl2)K(1-x)Cl(4-x) (x = 0.20) (3). In their crystal structures chains of anion-centered (OCu(2+)4) and (OCu(2+)3Pb) tetrahedra form honeycomb-like double layers with c...

Adsorption-based processes using metal-organic frameworks (MOFs) are a promising option for carbon dioxide (CO2) capture from flue gases and biogas upgrading to biomethane. Here, the adsorption of CO2, methane (CH4), nitrogen (N2) on Zn(dcpa) MOF (dcpa (2,6-dichlorophenylacetate)) is reported. The characterization by powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), N2 physisor...

Prostaglandin release from microvessels isolated from the rabbit cerebral cortex was determined under three different atmospheric conditions: 100% O2 ("O2") room air, and 95% N2=5% CO2 ("N2-COj"). Initial studies with homogenates prepared from rabbit cerebral microvessels (RCMV) indicated two pathways of enzymatic PGH2 transformation, namely PGI2 synthase and GSH-dependent PGHPGE isomerase. We ...

By introducing various N-containing compounds as efficient linkers, a series of hyper-crosslinked porous polymers with high surface areas and gas-uptake values were synthesized by using the Friedel-Crafts alkylation reaction. Structural characterization indicated the presence of nitrogen atoms, and gas-sorption experiments revealed that the high gas uptake benefitted from the high surface areas...

Efforts to utilize metal-organic frameworks, a new class of materials exhibiting high surface areas, tunable pore dimensions, and adjustable surface functionality, for CO2 capture will be presented. Open metal coordination sites on the framework surface can deliver a high CO2 loading capacity at low pressures. However, additional criteria such as water stability and the selective binding of CO2...

Populations of genetically identical microorganisms residing in the same environment can display marked variability in their phenotypic traits; this phenomenon is termed phenotypic heterogeneity. The relevance of such heterogeneity in natural habitats is unknown, because phenotypic characterization of a sufficient number of single cells of the same species in complex microbial communities is te...

This paper considers a new experimental set-up to image and study the combustion of single burning aluminum droplet, which is levitated electrostatically. work focuses on CO2, CO mixtures thereof, that have not or scarcely been studied. Aluminum found burn in pure CO2 diffusion mode (with D01.9 scaling, where D0 initial particle diameter) whereas kinetically limited halts swiftly, irrespective ...

In this work, a simulation package to study the adsorption separation of main components biogas (CO2/CH4/N2) regarding its upgrading has been developed. Biogas is renewable source energy that can be produced by treatment agricultural, municipal, and industrial wastes. To obtain pure biomethane, needs upgraded (by removing CO2 N2). After that, biomethane either injected into natural gas networks...

The present work aims to develop ultra-wide bandwidth air-coupled capacitive micromachined ultrasonic transducers (CMUTs) for binary gas mixture analysis. detection principle is based on time-of-flight (ToF) measurements, in order monitor ultrasound velocity variations. To perform such CMUTs were especially designed out of resonance mode, like a microphone. chosen membrane size 32 × µm2 and gap...