Birefringent porous glass integrated between two plastic optical fibers terminated by crossed PolaroidTM films was used as a low-cost end-of-service-life indicator (ESLI) for organic vapor cartridges. Birefringence is significantly reduced when volatile compounds condense into the anisotropic porous structure. Such changes could easily be quantified using a low-cost light source and detector an...

A process to produce fibers from Poly(m-phenyleneisophthalamide)(PMIA) solution in an ionic liquid via wet-spinning technology are described. The spinning process was investigated on a small laboratory scale. Ionic liquid spinning solutions were first prepared for PMIA fibers, followed by wet spinning. In the course of this research, the physical properties of the PMIA fibers were estimated. We...

In this work the physical-chemical properties of asphaltene-resin-paraffin deposits are studied. Their component composition was determined. The results obtained basis for selection effective solvents and choice method removing from oil reservoirs. Two hydrocarbon with brands “TSK А” B” were tested. solvent ability

The macroscopical characters of the roots, physical constant values, extractive values, colour, consistency and extractive values with different solvents, behaviour on treatment with different chemical reagents, fluorescence characters of liquid extracts and root powder after treatment with different chemical reagents under ultraviolet light of the powdered roots of Tragia involucrata Linn. (Fa...

Sucrose hydrolysis reaction, catalysed by invertase under microwave irradiation was carried out in aqueous, isopropanol + water and polyethylene glycol + water system. The effect of conventional and microwave heating on the rate of hydrolysis was studied under a range of physical exposure conditions. The catalytic activity of invertase in aqueous and organic solvents were measured at different ...

Circular DNA in viruses and bacteria is often knotted. While mathematically problematic, the determination of the knot size is crucial for the study of the physical and biological behaviour of long macromolecules. Here, we review work on the size distribution of these knots under equilibrium conditions. We discuss knot localization in good and poor solvents, or in polymers that are adsorbed on ...

Determination and location of cystine residues are essential to protein characterization since their disulfide bonds stabilize chainfolding and multichain structure responsible for physical and biological properties. Reduction with mercaptans, such as dithiothreitol, in dissociating solvents is the choice procedure for attaining disulfide cleavage, since other methods may cause undesirable side...

This manuscript deals with carbon capture and utilization to synthetize high-added chemicals using CO 2 as a C1-organic building block for C-C bond formation. The study focuses on the electrocarboxylation of 1,3,3-trimethylindolino-6'-bromobenzopyrylospiran switch ( Br-BIPS ). Prior process, electrochemical reduction mechanism is disclosed in polar aprotic solvents two different cathodes (glass...

Ultrathin gold nanowires are unusual colloidal objects that assemble into bundles with line contacts between parallel wires. Each molecule in the contact line interacts with many ligand and solvent molecules. We used X-ray scattering and electron microscopy to study how these interactions control assembly.