[Implementation and Formative Evaluation of a Health Navigator Service for Health and Wellness Guests in a Health Resort].

Objectives: To develop, implement and evaluate a health navigator service (HNS) for visitors and guests in a German health resort.

Method: Information on local health services providers was collected and included in a database. A complementary national and international literature search was conducted.

The influence of frequency on the mechanical and radical effects for the ultrasonic degradation of dextranes.

The ratio of mechanical and radical effects for the ultrasonic degradation of dextranes in aqueous solutions was studied in dependence of frequency and molecular weight of the dextranes. For low ultrasound frequency (35 kHz) a stronger increase of the polymer degradation with increasing molecular weight was found as expected on the basis of the radicals present. This is due to the mechanical effects of ultrasound.

A comparison of the degradation products formed in aerated, aqueous alpha-D-glucose solutions by ultrasound and gamma rays.

The degradation products formed in aerated aqueous alpha-D-glucose solutions by cleavage of the carbon skeleton by ultrasound and gamma irradiation are compared. Common products present for both types of irradiation are: D-glyceraldehyde, D-glyceric acid, hydroxy-malondialdehyde, 2,3-dihydroxy-4-oxo-butanoic acid, tetrodialdose, D-arabinoic acid and D-xylose. 2,3,4-Trihydroxy-5-oxo-pentoic acid and D-arabinose could be detected only by radiolysis and evidence for the formation of 2-hydroxy-3-oxo-pentoic acid was only obtained in sonolysis.

A comparison of the product formation induced by ultrasonic waves and gamma-rays in aqueous D-glucose solution.

The oxidation products obtained in aerated, aqueous alpha-D-glucose solutions after irradiation with ultrasonic waves and gamma-rays were compared. Separation and identification were performed by gas chromatography/mass spectrometry and three methods for the derivatization of the products were used: (1) trimethylsilylation of the OH groups; (2) methoximation of the carbonyl groups followed by trimethylsilylation of the OH groups; (3) reduction of the carbonyl and carboxyl groups to alcohols by sodium borodeuteride, followed by trimethylsilylation of the OH groups. When using ultrasound and gamma-irradiation identical products were observed: D-glucono-1,4-lactone, D-glucono-1,5-lactone, D-arabino-hexos-2-ulose, D-ribo-hexos-3-ulose, D-xylo-hexos-4-ulose, D-xylo-hexos-5-ulose, D-glucohexodialdose and arabino-1,4-lactone.