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| 2. |
- O'Keeffe, P, et al.
(author)
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Polarization effects in two-photon nonresonant ionization of argon with extreme-ultraviolet and infrared femtosecond pulses
- 2004
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In: Physical Review A (Atomic, Molecular and Optical Physics). - 1050-2947. ; 69:5
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Journal article (peer-reviewed)abstract
- We report the results of experimental and theoretical investigations of the two-color, two-photon ionization of Ar atoms, using femtosecond pulses of infrared laser radiation in combination with its extreme-ultraviolet harmonics. It is shown that the intensities of the photoelectron lines resulting from the absorption of photons from both fields strongly depend both on the respective phases of the fields and on atomic quantities such as the asymmetry parameter. These phases, which are notoriously difficult to measure, can be estimated by changing the polarization state of the laser radiation.
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| 3. |
- Rodrigo Blomqvist, Sandra, 1974, et al.
(author)
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Distal renal tubular acidosis in mice that lack the forkhead transcription factor Foxi1.
- 2004
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In: The Journal of clinical investigation. - 0021-9738. ; 113:11, s. 1560-70
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Journal article (peer-reviewed)abstract
- While macro- and microscopic kidney development appear to proceed normally in mice that lack Foxi1, electron microscopy reveals an altered ultrastructure of cells lining the distal nephron. Northern blot analyses, cRNA in situ hybridizations, and immunohistochemistry demonstrate a complete loss of expression of several anion transporters, proton pumps, and anion exchange proteins expressed by intercalated cells of the collecting ducts, many of which have been implicated in hereditary forms of distal renal tubular acidosis (dRTA). In Foxi1-null mutants the normal epithelium with its two major cell types - principal and intercalated cells - has been replaced by a single cell type positive for both principal and intercalated cell markers. To test the functional consequences of these alterations, Foxi1(-/-) mice were compared with WT littermates in their response to an acidic load. This revealed an inability to acidify the urine as well as a lowered systemic buffer capacity and overt acidosis in null mutants. Thus, Foxi1(-/-) mice seem to develop dRTA due to altered cellular composition of the distal nephron epithelium, thereby denying this epithelium the proper gene expression pattern needed for maintaining adequate acid-base homeostasis.
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| 4. |
- Sadreev, A.F., et al.
(author)
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Ground state and phase transitions in a system of arg-cysteamines self-assembled on a Au(111) crystal surface
- 2004
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In: Journal of Chemical Physics. - : AIP Publishing. - 0021-9606 .- 1089-7690. ; 120:2, s. 954-960
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Journal article (peer-reviewed)abstract
- A study was conducte don the ground state for the arg-cysteamine adsorbates. As such, the ground state energy of a monolayer self-assembled on Au(111) reveals a hexagonal structure reported for long-chained alkyl thiols. It was found that the hydrogen bonds in fact increase the temperature of phase transition by 40K.
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