Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    ISSN: 1432-0495
    Keywords: Key words Geomorphology ; Soil chemistry ; Hydrochemical modelling ; Lignite mines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  Acidification is the most common water quality problem in lakes created from previous open cast lignite mines. Aeration of aquifers and dump materials from mining activities causes pyrite oxidation. Pyrite oxidation products are stored in pore water, minerals and at the exchange complexes of the aquifers and dump sediments. Rainfall runoff transports sediments on the dump slope into the lakes. Elutriation of these sediments whithin the lakes releases either acid-producing or acid-neutralizing agents. At a test site south of Leipzig, the annual erosion rates were quantified by water erosion models (RUSLE, EROSION 2D, PEPP) and field measurements. They ranged from 300 up to 900 tons per hectare. Hydrogen ion equivalent release or binding at the sediment elutriation was computed from laboratory analysis of the pore-water quality, ion exchange complex and mineral composition of the sediment. Two of the three investigated sediments contained 3 mmol (eq) acidity per 100 g dry sediment and revealed saturation with respect to jarosite, jurbanite and gypsum. In the third sediment, 6 mmol (eq) alkalinity per 100 g dry sediment was obtained. The annual net acidity influx was calculated to be about 0.5 million mol (eq) for the lake of the test site.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1433-0407
    Keywords: Schlüsselwörter Amyotrophe Lateralsklerose ; Nichtinvasive Beatmung ; Chronische Hypoventilation ; Palliativtherapie ; Key words Amyotrophic lateral sclerosis ; Home mechanical ventilation ; Chronic hypoventilation ; Palliative therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Almost all patients with amyotrophic lateral sclerosis (ALS) experience symptoms of nocturnal hypoventilation during the course of the illness. These symptoms can develop years before death and may severely affect quality of life. Non-invasive intermittent home mechanical ventilation (HMV) via mask is a possible palliative measure for these symptoms, which is not often used in Germany. We report on our experience with HMV in 24 patients with ALS. Our data show a good palliative effect in 17 of 24 treated patients. Severe complications did not occur. The mean ventilation time at present is 14 months. Available options and their consequences need to be discussed in detail with patients and relatives before HMV is initiated.
    Notes: Zusammenfassung Fast alle Patienten mit amyotropher Lateralsklerose (ALS) leiden im Verlauf der Erkrankung an Symptomen der chronischen Hypoventilation. Diese Symptome können Jahre vor dem Tod auftreten und die Lebensqualität erheblich beeinträchtigen. Eine Möglichkeit zur Linderung dieser Beschwerden stellt die nichtinvasive, intermittierende Selbstbeatmung über Maske (ISB) dar. Allerdings findet diese Maßnahme in Deutschland noch wenig Anwendung. Wir berichten über erste Erfahrungen mit der ISB bei 24 Patienten mit ALS. Unsere Daten zeigen eine gute palliative Wirksamkeit der ISB bei 17 von 24 behandelten Patienten. Schwere Komplikationen wurden nicht beobachtet. Die mittlere Beatmungsdauer beträgt derzeit 14 Monate. Voraussetzung für die Einleitung einer ISB ist eine frühzeitige und ausführliche Diskussion möglicher Optionen und deren Konsequenzen mit Patienten und Angehörigen.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...