The antifolate compound methotrexate (MTX) is toxic to the gram-positive bacterium Streptococcus pneumoniae. Interaction of MTX with this bacterium resulted in an increase in the electric transmembrane potential (delta psi) and enhanced the delta psi-dependent uptake of isoleucine and MTX. In contrast, delta psi-independent uptake of glutamine was not changed. Folate, a nontoxic analog of MTX, ...

A droplet with a small portion of cellulose nanofibers (CNFs) has low viscosity to be compatible inkjet discharge, but CNFs form structural order prevent the coffee-ring phenomenon at last stage drying sessile droplet.

Two simple methods for dissolving salts of acid glycosaminoglycans with inorganic cations (e.g. Li+ and Na+) in dry dimethyl sulphoxide are described. Complete n.m.r. spectra of, e.g., Na+ and Li+ salts of chondroitin sulphate and keratan sulphate were obtained on these solutions. In [2H6]dimethyl sulphoxide the NH resonance of 2-acetamido-2-deoxy hexosides is in the range 7.2-8.0 delta, but is...

We investigate the early stages of mass convection in a colloidal suspension at high solutal Rayleigh number Ras. From the time evolution of shadowgraph images and by assuming a diffusive growth of the boundary layers we obtain an indirect measurement of the concentration boundary layer thickness delta* at the onset of convection. We show that the dimensionless boundary layer thickness delta=de...

The heterogeneous integration of lithium niobate photonic waveguide devices onto a silicon nitride platform via transfer-printing approach has been demonstrated for the first time. A fabrication process was developed to make free-standing membrane compatible with back-end integrated circuits. Micro-ring resonators in format were lithographically defined by using laser direct writing and plasma ...

Absence of localization is demonstrated analytically to leading order in weak disorder in a one-dimensional Anderson model of a ring threaded by an Aharonov-Bohm (AB) flux. The result follows from adapting an earlier perturbation treatment of disorder in a superconducting ring subjected to an imaginary vector potential proportional to a depinning field for flux lines bound to random columnar de...

Misalignment is a problematic challenge in RF MEMS resonators. It causes asymmetry in the ultra symmetric radial contour mode disk resonators and degrades their performance by increasing the insertion loss and decreasing their quality factors (Q). Self-alignment method seems to be a good solution for misalignment problem, but it cannot be directly applied on high performance ring shape anchored...

Let p denote an odd prime. We show that the spectrum [ E(n), the In-adic completion of Johnson and Wilson’s E(n), admits a unique topological A∞ structure compatible with its canonical ring spectrum structure. Furthermore, the canonical morphism of ring spectra [ E(n) −→ K(n) admits an A∞ structure whichever of the uncountably many A∞ structures of A. Robinson is imposed upon K(n), the n th Mor...