Crystal structure of a third polymorph of tris-(acetyl-acetonato-κ(2) O,O')iron(III).

In the structure of the title complex, [Fe(C5H7O2)3] or Fe(acac)3, the asymmetric unit contains one mol-ecule in a general position. The coordination sphere of the Fe(III) atom is that of a slightly distorted octahedron. The crystal under investigation was a two-component pseudo-merohedral twin in the monoclinic system with a β angle close to 90°.

Natural snowfall reveals large-scale flow structures in the wake of a 2.5-MW wind turbine.

To improve power production and structural reliability of wind turbines, there is a pressing need to understand how turbines interact with the atmospheric boundary layer. However, experimental techniques capable of quantifying or even qualitatively visualizing the large-scale turbulent flow structures around full-scale turbines do not exist today. Here we use snowflakes from a winter snowstorm as flow tracers to obtain velocity fields downwind of a 2.

The metabolic and mechanical costs of step time asymmetry in walking.

Animals use both pendular and elastic mechanisms to minimize energy expenditure during terrestrial locomotion. Elastic gaits can be either bilaterally symmetric (e.g.

Cycloaddition of homochiral dihydroimidazoles: a 1,3-dipolar cycloaddition route to optically active pyrrolo[1,2-a]imidazoles.

N-Alkylation of optically active 1-benzyl-4-phenyl-4,5-dihydroimidazole with active alkyl halides and treatment of the so-formed 4,5-dihydroimidazolium ions with DBU in the presence of a range of electron-deficient alkene dipolarophiles, constitutes a 'one-pot' cascade terminating in a 1,3-dipolar cycloaddition reaction that affords optically active pyrrolo[1,2-a]imidazoles. Three bonds of the so-formed pyrrolidine moiety are constructed in this cascade. The cycloaddition follows an endo approach of dipole and dipolarophile with anti geometry of the dipole and facial selectivity derived from the phenyl substituent.

Aromatase deficiency causes altered expression of molecules critical for calcium reabsorption in the kidneys of female mice *.

Unlabelled: Kidney stones increase after menopause, suggesting a role for estrogen deficiency. ArKO mice have hypercalciuria and lower levels of calcium transport proteins, whereas levels of the klotho protein are elevated. Thus, estrogen deficiency is sufficient to cause altered renal calcium handling.

Syndromic surveillance for emerging infections in office practice using billing data.

Purpose: We wanted to evaluate the feasibility of conducting syndromic surveillance in a primary care office using billing data.

Methods: A 1-year study was conducted in a primary care practice; comparison data were obtained from emergency department records of visits by county residents. Within the practice, a computer program converted billing data into de-identified daily summaries of International Classification of Diseases, Ninth Revision (ICD-9) codes by sex and age-group; and a staff member generated daily summaries and e-mailed them to the analysis team.

Reduction of liver metastasis of intraocular melanoma by interferon-beta gene transfer.

Purpose: This study determined whether adenovirus-mediated transfer of the murine interferon-beta (AdCMVIFN-beta) gene protects against liver metastases arising from intraocular melanomas in mice.

Methods: A replication-deficient adenovirus vector (AdCMVIFN-beta) was used for the in vivo transfer of the murine IFN-beta gene into intraocular melanoma-bearing mice. AdCMVIFN-beta was injected either intravenously or directly into the intraocular melanomas.

Adaptive immune responses to Acanthamoeba cysts.

Acanthamoeba cysts are not eliminated from the corneas of human subjects or experimentally infected animals. The persistence of Acanthamoeba cysts in the cornea indicates that either the cysts escape immunological elimination or are not recognized by the host's immunological elements. The aim of this study was to determine the immunogenicity and antigenicity of the Acanthamoeba cyst.