Abstract Enceladus harbors an ocean beneath its ice crust that erupts spectacular plumes from fissures at the south pole. The plume composition was measured by Cassini spacecraft, and provides evidence for ocean’s gas content, salinity, pH, potential life. Understanding is complicated physicochemical processes alter during eruption, such as water vapor condensation in icy exsolution surface. We...

Particulate matter (PM) pollution from coal combustion is a leading contributor to the influence of atmospheric visibility, photochemical smog, and even global climate. A drop tube furnace was employed explore effects temperature chemical speciation mineral elements on PM formation during Zhundong coal. Chemical fractionation analysis (CFA), X-ray fluorescence (XRF), inductively coupled plasma-...

Separation of milk into well-defined fractions will lead to a more optimal use of milk components (milk fat, casein, serum proteins) and their functional properties. In principle, membrane separation technology is well capable of large-scale fractionation of milk. Membrane processes for the isolation of serum proteins from whey, and the reduction of bacteria and spores in skimmed milk have alre...

balance among different fractions of a carbon sources is of paramount importance in maintenance of very important in soil quality and environmental health. on the other hand, rapid growth of world population, degradation of agricultural soils, along with release of greenhouse gasses are some of the main challenges of the 21st century. the aim of this study was to investigate the extent of chang...

Four hibonite-bearing refractory inclusions, HAL from Allende, DH-Hl from the Dhajala H3 chondrite, 7-404 and 7-97 1 from the Murchison CM2 chondrite, have related chemical and isotopic systematics: they exhibit large Ce and V depletions and very low Mg and Ti concentrations compared to other meteoritic hibonites and have mass-fractionated Caand Ti-isotopic compositions with emichments in the h...

A stable isotope mass-balance of dissolved inorganic carbon during a blue-green algae bloom in a softwater lake demonstrates that at low partial pressure of carbon dioxide there must be a large net negative carbon isotope fractionation between atmospheric CO1 and the CO2 absorbed by lake water at pH = 9.5. The net fractionation of CO*(g) with respect to HCO; was about -13%~ compared with about ...

Although produced from simple monomers that contain just carbon and hydrogen, polyolefin have complex molecular structures are characterized by distributions in molar mass, chemical composition, branching. Accordingly, a variety of advanced analytical techniques needed for the comprehensive characterization heterogeneity polyolefins. These include different fractionation, spectroscopic, thermal...

The access to libraries of molecules with interesting biomolecular properties is a limiting step in the drug discovery process. By virtue of a long molecular evolution process, natural products are recognized as biologically validated starting points in structural space for library development. We introduce here a strategy to generate natural product-like libraries. A semisynthetic mixture of c...

• Different impact of electron beam irradiation on aliphatic and aromatic thermoplastic polyurethanes. Degradation, chain scission snd crosslinking depends dose temperature. ThFFF as an alternative approach for advanced analysis crosslinked polymer structures. The polyurethane material was studied both with approximately equal molar amount hard soft segments. Irradiation doses up to 300 kGy (ki...