An apparatus was designed for simultaneous measurement of rates of N(2) fixation estimated by C(2)H(2)-C(2)H(4) assay (N(2)[C(2)H(2)] fixation) and NO(3) (-) absorption by roots of intact, nodulated soybeans (Glycine max [L.] Merr.). The principal design features include: (a) a gas-tight mist chamber in which nodulated roots can be exposed simultaneously to C(2)H(2) in the gas phase and to a li...

X-ray radiographic absorption imaging is an invaluable tool in medical diagnostics and materials science. For biological tissue samples, polymers, or fiber composites, however, the use of conventional X-ray radiography is limited due to their weak absorption. This is resolved at highly brilliant X-ray synchrotron or micro-focus sources by using phase-sensitive imaging methods to improve contras...

Terahertz waves provide a better contrast in imaging soft biomedical tissues than X-rays, and unlike X-rays, they cause no ionisation damage, making them a good option for biomedical imaging. Terahertz absorption imaging has conventionally been used for cancer diagnosis. However, the absorption properties of a cancerous sample are influenced by two opposing factors: an increase in absorption du...

background: recurrent herpes labialis (rhl) is one of most common infective vesiculoulcerative lesions. according to some studies administration of topical and/or systemic zinc compositions has been effective in treatment and prevention. this article aims to comparison of zinc level in healthy subjects and rhl patients in acute and convalescent phases. materials and methods: this was a retrospe...

We perform attosecond time-resolved transient absorption spectroscopy around the first ionization threshold of helium and observe rapid oscillations of the absorption of the individual harmonics as a function of time delay with respect to a superimposed, moderately strong infrared laser field. The phase relation between the absorption modulation of individual harmonics gives direct evidence for...

Abstract. Aerosol-induced absorption of shortwave radiation can modify the climate through local atmospheric heating, which affects lapse rates, precipitation, and cloud formation. Presently, total amount aerosol is poorly constrained, main absorbing species (black carbon (BC), organic aerosols (OA), mineral dust) are diversely quantified in global models. As part third phase Aerosol Comparison...