Since the 1990s, interest in natural product research has increased considerably. Following several outstanding developments in the areas of separation methods, spectroscopic techniques, and sensitive bioassays, natural product research has gained new attention for providing novel chemical entities. This updated review deals with sample preparation and purification, recent extraction techniques...

Generating chemical libraries in droplet form is vital to the adoption of microdroplet systems in high-throughput screening (HTS). This paper presents microfractionation in droplets (μFD), a method for generating heterogeneous droplet libraries using standard separation processes. In μFD, compounds eluting from a separation column are permanently encapsulated into droplets by a droplet generato...

Shell effects in the coordinate space can be seen with degenerate Fermi vapors in non-uniform trapping potentials. In particular, below the Fermi temperature, the density profile of a Fermi gas in a confining harmonic potential is characterized by several local maxima. This effect is enhanced for ”magic numbers” of particles and in quasi-1D (cigar-shaped) configurations. In the case of a multi-...

The sodium salt of the single-isomer, chiral resolving agent, octakis(2,3-diacetyl-6-sulfo)-g-cyclodextrin (ODAS-gCD) has been used for the capillary electrophoretic separation of the enantiomers of alkylarylphosphates which carry a phosphorus-based stereogenic center. The effective mobilities and separation selectivities were measured at different ODAS-gCD and methanol concentrations to find t...

Chromatography is the separation of a mixture of compounds into its individual components based on their relative interactions with an inert matrix. However, chromatography is more than a simple technique, it is an important part of science encompassing chemistry, physical chemistry, chemical engineering, biochemistry and cutting through different fields. It is worth to be mentioned here that t...

Gold nanoparticles which are known for thousands years started their progress in 19 century. Nowadays gold nanoparticles are used in several fields of chemistry, physics, materials, medicine, and optics due to their unique physical and chemical properties (ref. 1). However, their applications in the separation science are still relatively rare. Nanoparticles have been successfully used to enhan...

Oxygen concentration and separation is an essential factor for air recycling in a CELSS. Furthermore, if the value of the plant assimilatory quotient is not coincident with that of the animal respiratory quotient, the recovery of O2 from the concentrated CO2 through chemical methods will become necessary to balance the gas contents in a CELSS. Therefore, oxygen concentration and separation equi...

Chemical-Looping Combustion (CLC) is an emerging technology for CO2 capture because separation of this gas from the other flue gas components is inherent to the process and thus no energy is expended for the separation. Natural or refinery gas can be used as gaseous fuels and they may contain different amounts of light hydrocarbons. This paper presents the combustion results obtained with a Cu-...

Fluorescence spectroscopy is the most sensitive optical detection technique used with high-performance liquid chromatography (HPLC). Fluorescence of a molecule can occur naturally or can be achieved by labeling the molecule with a fluorescent tag in a derivatization reaction. A classic application of such a derivatization is for amino acid analysis. The chemical modification can be performed in...