An analytical method for the profiling and quantitative determination of carotenoids in bacteria is described. Exhaustive extraction of the pigments from four selected bacterial strains required treatment of the cells with potassium hydroxide or liquefied phenol or both before the addition of the extracting solvent (methanol or diethyl ether). The carotenoids in the extracts were separated by n...

Previous studies (l-5) related to the present communication have dealt with the development and application of the solvent perturbation technique of difference spectroscopy to studying the location of chromophoric side chains in globular proteins dissolved in aqueous media. The present paper deals with the extension of this new technique to the study of the properties of proteins and polypeptid...

Here we emphasise the importance of the dielectric environment on the electron transfer behavior in interfacial electrochemical systems. Through doping cobalt hexacyanide (Co(CN)63-) into single microcrystals of sodium chloride (NaCl), for the first time, we obtained the direct electrochemical behavior of Co(CN)63- which is hardly ever obtained in either aqueous or conventional nonaqueous solut...

Abstract Interfacial modular assemblies of eco‐friendly metal–phenolic networks (MPNs) are interest for surface and materials engineering. To date, most MPNs assembled on water‐stable substrates; however, the self‐assembly highly water‐soluble substrates remains unexplored. Herein, a versatile approach is reported to engineer thickness‐tunable coatings (2–25 µm) substrate (i.e., urea) via in no...

The solution properties of water-soluble amphiphiles in nonaqueous polar solvents are important in the elucidation of the effects of solvent quality on self-assembly and also in practical applications where the use of water as a solvent is undesirable. We studied the self-assembly of a poly(ethylene oxide)-poly(propylene oxide) (PEO-PPO) block copolymer (Pluronic P105: EO37PO58EO37) in formamid...

The development of the multivalent electrolytes is a critical component to advance polyvalent energy storage technology. In this work, new and simple nonaqueous zinc electrolyte developed investigated where secondary amine introduced as cosolvent. addition dimethylamine (DMA) cosolvent in THF facilitates solubilization Zinc (II) bis(trifluoromethanesulfonyl)imde (Zn(TFSI) 2 ) results homogeneou...

Oxidised nitrogen species (NOx) are recognised as a major source of false-positive reduction reaction (NRR) results. Even when addressed, NOx commonly eradicated at the initial stages experiment only. The present work demonstrates shortcomings this approach through scrutiny evolution NH3, NO2? and NO3? during N2-saturated acetonitrile solutions with an Fe-modified electrode. Notwithstanding, th...

By using solid-state NMR spectroscopy, the integrity of the active center of alpha-chymotrypsin was investigated under a variety of nonaqueous conditions. Specifically, 13C cross-polarization/magic angle spinning NMR was used to analyze the ability of alpha-chymotrypsin to stabilize a transition state intermediate analog after freezing, drying, and addition of organic solvents (both anhydrous a...

Complex formation between the silver(I) ion and monoazaand diaza-crown ethers has been studied in five polar, nonaqueous solvents using potentiometric techniques. The stability constants are spread over seven orders of magnitude, and the major contributor to this variation is the solvation of the silver(I) cation. The ring-size dependence of the stability constants is determined both by the cor...