In this paper, we show how through integrating the beneficial characteristics of micro-fluidic devices and spiropyrans dyes, a simple and very innovative chip configured as an on-line photonically controlled self-indicating system for metal ion accumulation and release can be realised. The micro-fluidic device consists of five independent 94 μm depth, 150 μm width channels fabricated in polydim...

The zinc ion (Zn2+) is abundant in neurons. However, excessive Zn2+ can induce neuronal cell death. This study examined the role of Zn2+ in transient retinal ischemia in adult male rats. The rats were sacrificed 4-24 h after retinal ischemia by high intra-ocular pressure, and the retinas were prepared for microscopic examination of retinal cell degeneration, and fluorescence microscopy using zi...

Potassium ion and Na(+) influx and efflux rates into and from excised barley roots are compared with the maximum capacity of accumulation. Potassium ion and Na(+) influx and efflux involve a cation exchange that is independent of simultaneous exchange of the accompanying anion. These exchange fluxes depend on the concentration and cation composition of the solutions from which they originate. S...

The rate of uptake of putrescine by Anacystis nidulans has been shown to depend on the external pH and the extracellular concentration of putrescine. Accumulation of exogenous putrescine was also proportional to the concentration of putrescine in the medium, suggesting that putrescine uptake was not subject to cellular regulation. An equation was derived to test the hypothesis that putrescine a...

The potential-induced accumulation of electrolyte ions at the water/1,2-dichloroethane (DCE) electrochemical interface has been examined by total internal reflection second harmonic generation (TIR SHG). TIR SHG experiments provide the first direct optical measurements of the accumulation of the base electrolytes, tetraphenylarsonium (Ph4As) and tetraphenylborate (Ph4B), in the interfacial regi...

Molecular dynamics (MD) simulations are used to probe the origin of the unexpected temperature dependence of salt accumulation in the C-terminal region of the protein human lymphotactin. As in previous MD simulations, sodium ions accumulate in an enhanced manner near the C-terminal helix at the lower temperature, while the temperature dependence of chloride accumulation is much weaker and sligh...

The microcrack accumulation in impact damaged α-quartz plates prior to and after the Ar + -ion implantation was studied with acoustical emission (AE) method. 40 keV doses of 10 14 16 ion/cm 2 were applied. statistical analysis energy distribution impact-induced AE time series detected unirradiated samples showed a random (poissonian type) defects which is specific for mechanical destruction hom...

The mechanism of intracellular fluorescein accumulation was investigated by studying fluorescein accumulation kinetics in individual cells in culture. The experiments were done with K562 human erythroleukemia cell culture and a primary culture of human embryonic skin fibroblasts. Various experimental conditions were used by varying pH and ion composition of the external media, and/or temperatur...

In recent decades the West Antarctic Ice Sheet has experienced warming and glacial retreat. Despite receiving growing attention, knowledge of glacial dynamics in this region remains limited. Snow accumulation data is sparse and fails to capture true spatial variability. A shallow firn core, drilled at the triple ice divide between Pine Island Glacier, Institute Ice Stream, and Rutford Ice Strea...

this study was designed to investigate the effect of p. fluorescens fy32 inoculation on the activities of some antioxidant enzymes and ion concentration of two canola cultivars (sarigol and hyola308) under salinity stress (150 and 300 mm nacl) in the greenhouse condition (fall 2012, dept. of plant breeding and biotechnology, faculty of agriculture, university of tabriz). the experimental design...