A dedicated test of the effects of Nitrogen contamination in liquid Argon has been performed at the INFN-Gran Sasso Laboratory (LNGS, Italy) within the WArP R&D program. A detector has been designed and assembled for this specific task and connected to a system for the injection of controlled amounts of gaseous Nitrogen into the liquid Argon. Purpose of the test is to detect the reduction of th...

ABSTRACT The development of a cryo-cooling microfluidic device for reducing the resistive noise of a magnetic resonance (MR) microcoil to improve its signal-to-noise ratio (SNR) in MR microscopy applications is presented. The radiofrequency (RF) spiral coil was cryo-cooled to liquid nitrogen temperature (-196oC) by the integrated microfluidic channels carrying liquid nitrogen for decreasing the...

Fig. 6. Analysis of the volatile amines present in Chenopodium vulvaria L. Curve A: standard mixture ofmono-, diand tri-methylamines. Curve B: chromatogram of the amines present in an acid extract ofthe plant, showing the presence of only ammonia and trimethylamine. (Column length, 4ft.; liquid phase, hendecanol-iS% liquid paraffin (v/v); temp., 78 50; flow rate of nitrogen, 5.7 ml./min.; nitro...

GENIUS is a proposal for a large volume detector to search for rare events. An array of 40–400 ’naked’ HPGe detectors will be operated in a tank filled with ultrapure liquid nitrogen. After a description of performed technical studies of detector operation in liquid nitrogen and of Monte Carlo simulations of expected background components, the potential of GENIUS for detecting WIMP dark matter,...

Several clues indicate that Titan’s atmosphere has been depleted in methane during some period of its history, possibly as recently as 0.5-1 billion years ago. It could also happen in the future. Under these conditions, the atmosphere becomes only composed of nitrogen with a range of temperature and pressure allowing liquid or solid nitrogen to condense. Here, we explore these exotic climates t...

4 A prototype Peltier thermoelectric cooling unit has been constructed to cool a cold finger on an 5 electron microprobe. The Peltier unit was tested at 15W and 96W, achieving cold finger 6 temperatures of -10°C and -27°C respectively. The Peltier unit did not adversely affect the analytical 7 stability of the instrument. Heat conduction between the Peltier unit mounted outside the vacuum 8 and...

dissolved nitrogen predispersed solvent extraction (dnpdse) is a new method devised for improving the performance of equipment utilized in the solvent extraction (sx) method, especially for dilute solutions. in this method, for mixing the two phases, bubble dispersion of the organic phase (colloidal gas aphrons [cgas]) is used instead of its drop dispersion in the aqueous phase. through increas...

First attempts to explain unusual behavior of Hugoniot in shock-compression experiments on liquid nitrogen [1] have been made many years ago [2-4]. They were based on an idea of polymerization reaction when triple chemical bonds in nitrogen diatomics broke and a spatial set of single chemical bonds appear [3]. According to predictions based on a simple model of sticky hard spheres [4] the molec...

Many publications describe cryopreservation techniques but only a few studies have focused on the biochemical and physiological changes occurring in plants regenerated from seeds exposed to liquid nitrogen. This paper aims at describing the effect of common bean seed cryostorage on mineral nutrition of young plantlets. The following elements were measured on leaves of 10-dayold plantlets from n...

Genomic DNA was isolated from leaves of three species of Jatropha, namely J. glandulifera, J. gossypifolia and J. curcas. The objective of our study was to use alcohol as a fixing solution, making liquid nitrogen unnecessary for isolation of genomic DNA from Jatropha species. The spectral quality of genomic DNA isolated using this method as measured by the A260/A280 absorbance ratio ranged from...