Indirect radiation effects on thymine in the glassy state of its dilute aqueous solution

Article Abstract:

The effects of gamma-irradiation on thymine aqueous solution in the glassy state at 77 K was investigated using electron spin resonance spectroscopy. Results revealed a formation of substantial amounts of thymine radicals at the expense of the relative contribution of HO2 radicals. The formation of thymine radicals can be explained by a concerted process involving the primary intermediate H2O+ and is most probably an indirect radiation effect as suggested by the water-to-thymine ratio in the dilute glassy solution.

Radicals (Chemistry), Electron paramagnetic resonance

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Increasing contact-ion pairing as a supercooled water anomaly. Estimation of the fictive temperature of hyperquenched glassy water

Article Abstract:

A study was conducted to analyze anomalous increases in the contact-ion pairing of dilute calcium nitrate solution on cooling from 300 to 240 K. The Biorad FTS 45 spectrometer was utilized to record the infrared spectra in transmission. The spectra was recorded at each temperature step after 5 minutes. Experimental results indicated that conformational/structural changes can be determined by increases in contact-ion pairing.

Analysis, Water, Calcium, Calcium (Chemical element), Nitrates, Water analysis

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Anomalous contact-ion pairing in the glassy states of "dilute" aqueous lithium and sodium perchlorate solution

Article Abstract:

Research is presented describing the use of an FT-IR spectroscopy to study contact-ion pairing of dilute D2O solutions of aqueous lithium (0.5 and 3 M) and sodium (1 and 3 M) perchorate in their glassy states.

Usage, Sodium, Sodium (Chemical element), Lithium, Lithium (Metal), Fourier transform infrared spectroscopy

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