We consider the physics of lattice bosons affected by disordered on-site interparticle interactions. Characteristic qualitative changes in the zero-temperature phase diagram are observed when compared to the case of randomness in the chemical potential. The Mott-insulating regions shrink and eventually vanish for any finite disorder strength beyond a sufficiently large filling factor. Furthermo...

Kerateine and metakeratin were prepared from wool, chicken feathers and human hair. Chemical analyses revealed that the compounds are closely related. The results of serological studies disclose that species specificity is an individual characteristic of the keratins employed and that the specificity observed is dependent on the redox state of the sulfhydryl groupings in the protein molecule.

The present study includes the morphological and anatomical characteristic of the leaf along with the determination of physio chemical constants, phytochemical screening and volatile oil content determination on the leaves of Anisomeles malabarica (LAMIACEAE) to provide some pharmocognostical standards and serves as a standard reference for the identification of Anisomeles malabarica.

In pharmaceutical quality control, technologies are necessary that identify different chemical compounds. Thisidentification should be performed in a non invasive way. The Terahertz (THz) technology has proven to be a usefultool in that aim. In these wavelengths chemical compounds have characteristic absorption spectra while at the sametime most packaging materials such as carton, p...

the effects of solvent, temperature, time, weight percent of catalyst on the rate and mechanism of cyclization of natural rubber (nr) was studied in toluene and xylene solutions having tin tetra chloride catalyst (sncl4). iodometric titration show, with 8% sncl4 (based on polymer weight) cyclization occurs, leaving 27.4% of the total unsaturation. infrared spectra of cyclized nr show decreased ...

Metalworking fluids (MWF) play a significant role in manufacturing processes, such as machining or forming. Consequently, a high number of MWF with varying chemical composition are commercially available. However, the working mechanisms of the MWF are still object of discussion in science and application. This paper addresses the possible interactions of additives with metal surfaces taking the...

Liquid chromatography-mass spectrometry is one of the most powerful methods for the identification and detection of chemical structures of lipids. In this study, we attempted to identify the chemical structures of glucosylceramides from maize, rice, mushroom (maitake) and sea cucumber by liquid chromatography-ion trap mass spectrometry. For structural analysis of glucosylceramides, [M+H]+, [M+H...

The characteristic approach in mature engineering disciplines (e.g. civil and chemical engineering) is to build systems (e.g., buildings or chemical plants) from known solutions such as proven designs and existing components [Shaw90,D’Ippolito89]]. Engineers in mature disciplines also put great emphasis on proactively avoiding costly problems by evaluating the system before it is built [Liu87]....