A sequential mouse cell culture system is described for the induction and assay of T-helper cells. Unprimed, cortisone-resistant, nylon wool-purified thymocytes cultured with adherent peritoneal exudate cells can be primed in vitro with soluble carrier protein to generate carrier-reactive helper cells. These cultured cells enhance the anti-hapten plaque-forming response of hapten-primed spleen ...

1. The distribution of azide added to suspensions of bakers' yeast was studied under various conditions. The recovery of azide was estimated in the volume of water into which low concentrations of electrolytes can readily diffuse (anion space). Considerable azide disappeared from this anion space. 2. The incomplete recovery of azide in the anion space is due to its uptake by the cells. This upt...

The speed of a bus network is often specified by the Abstract parameter a, which denotes the end-to-end propagation delay normalized with respect to the We study the performance of the slotted ALOIH A average packet transmission time. With current multiple access protocol in a high speed bidirectional technology and cost trends, typical values of a in most passive bus network, where transmissio...

Traditional approaches using superimposed signals in wireless sensor networks have high demands on the hardware capabilities of a single network node. This work loosens these constraints and derives a communication system for low-resource wireless sensor networks requiring no complex signal processing, no fast A/D conversion, no carrier or phase synchronization. Therefore, it is applicable for ...

Liquid membrane processes have attracted many interests in recent years for removal of heavy metals such as cadmium from industrial wastewaters. In this study, a modified hybrid liquid membrane system is introduced. The setup is worked by applying the water-insoluble dioctyl phthalate as the organic solvent. N-octanol and tetra butyl ammonium bromide are added to the organic phase to increase t...

A flow injection system is reported for the determination of fluoride based on its effects on the fluorescence intensity of Al-morin complex at pH 3.0 in ethanol-warn mixture. The effect of important parameters such as excitation and emission wavelengths, pH, reagents concenkations, flow rate of the carrier stream, sample injection volume, time of measurepent and interferences are reported. ...

Traditional approaches using superimposed signals in wireless sensor networks have high demands on the hardware capabilities of a single network node. This work loosens these constraints and derives a communication system for low-resource wireless sensor networks requiring no complex signal processing, no fast A/D conversion, no carrier or phase synchronization. Therefore, it is applicable for ...

Smallpox has been a major epidemic disease since the dawn of history. Caused by the variola virus – a large DNA virus, which is a strict human pathogen with no carrier state. The virus belongs to a related group of viruses causing pox-like infections in other mammals. The milder infections caused by these animal viruses in humans generate excellent immunity against smallpox, as does natural or ...