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Tests of the Stability of Chinese RhFe Resistance Thermometers at Low Temperatures

Rhodium–iron resistance thermometers are recommended as precise thermometers at temperatures below 25 K. The thermometers were developed at the National Physical Laboratory and produced by H. Tinsley and Co Ltd almost 50 years ago. Later, they were made by other companies and institutes as well, but despite this, the availability of the thermometers decreased and a new source of...

Comparison of the Argon Triple-Point Temperature in Small Cells of Different Construction

. Rouillé, J.-P. Thermeau , D. Truong , F. Galet , Y. Hermier , Int. J. Thermophys . 32 , 201 ( 2011 ) 7. A. Szmyrka-Grzebyk , L. Lipin´ski, H. Manuszkiewicz , A. Kowal , A. Grykałowska , D. Jancewicz , Int

The structural diversity of artificial genetic polymers

Synthetic genetics is a subdiscipline of synthetic biology that aims to develop artificial genetic polymers (also referred to as xeno-nucleic acids or XNAs) that can replicate in vitro and eventually in model cellular organisms. This field of science combines organic chemistry with polymerase engineering to create alternative forms of DNA that can store genetic information and...

Argon Triple-Point Device for Calibration of SPRTs

B. Koodziej H. Manuszkiewicz A. Szmyrka-Grzebyk L. Lipi nski A. Kowal P. P. M. Steur F. Pavese This paper presents an apparatus for the calibration of long-stem platinum resistance thermometers at

Decreased Spontaneous Eye Blink Rates in Chronic Cannabis Users: Evidence for Striatal Cannabinoid-Dopamine Interactions

Chronic cannabis use has been shown to block long-term depression of GABA-glutamate synapses in the striatum, which is likely to reduce the extent to which endogenous cannabinoids modulate GABA- and glutamate-related neuronal activity. The current study aimed at investigating the effect of this process on striatal dopamine levels by studying the spontaneous eye blink rate (EBR...

Cannabis and creativity: highly potent cannabis impairs divergent thinking in regular cannabis users

Rationale Cannabis users often claim that cannabis has the potential to enhance their creativity. Research suggests that aspects of creative performance might be improved when intoxicated with cannabis; however, the evidence is not conclusive. Objective The aim of this study was to investigate the acute effects of cannabis on creativity. Methods We examined the effects of...

Measuring Systems for Thermometer Calibration in Low-Temperature Range

The national temperature standard for the low-temperature range between 13.8033 K and 273.16 K has been established in Poland at the Institute of Low Temperature and Structure Research (INTiBS). The standard consists of sealed cells for realization of six fixed points of the International Temperature Scale of 1990 (ITS-90) in the low-temperature range, an adiabatic cryostat and...

Recognition of O6-benzyl-2′-deoxyguanosine by a perimidinone-derived synthetic nucleoside: a DNA interstrand stacking interaction

The 2′-deoxynucleoside containing the synthetic base 1-[(2R,4S,5R)-4-hydroxy-5-(hydroxymethyl)-tetrahydrofuran-2-yl)-1H-perimidin-2(3H)-one] (dPer) recognizes in DNA the O6-benzyl-2′-deoxyguanosine nucleoside (O6-Bn-dG), formed by exposure to N-benzylmethylnitrosamine. Herein, we show how dPer distinguishes between O6-Bn-dG and dG in DNA. The structure of the modified Dickerson...