منابع مشابه
Ion Balance Mass Spectrometry
We have developed a technique to simultaneously compare the cyclotron frequencies of two single ions to obtain atomic mass ratios with fractional accuracies at or below 10−11. Much like a balance scale, this two-ion technique cancels many sources of noise and error – chief among them magnetic field noise. The new mass comparisons are used in combination with γ-ray wavelength measurements, perfo...
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[1] We use 22 monthly GRACE (Gravity Recovery and Climate Experiment) gravity fields to estimate the linear trend in Greenland ice mass during 2002–2004. We recover a decrease in total ice mass of 82 ± 28 km of ice per year, consistent with estimates from other techniques. Our uncertainty estimate is dominated by the effects of GRACE measurement errors and errors in our post glacial rebound (PG...
متن کاملMass balance inverse modelling of methane
Mass balance inverse modelling of methane in the 1990s using a Chemistry Transport Model T. M. Butler , I. Simmonds, and P. J. Rayner School of Earth Sciences, Melbourne University, Australia CSIRO Atmospheric Research, Melbourne, Australia Present affiliation: Max Planck Institute for Chemistry, Mainz, Germany Received: 7 April 2004 – Accepted: 24 May 2004 – Published: 22 June 2004 Corresponde...
متن کاملMass balance analysis of contaminated heparin product.
A quantitative analysis of a recalled contaminated lot of heparin sodium injection U.S. Pharmacopeia (USP) was undertaken in response to the controversy regarding the exact nature of the contaminant involved in the heparin (HP) crisis. A mass balance analysis of the formulated drug product was performed. After freeze-drying, a 1-ml vial for injection afforded 54.8±0.3 mg of dry solids. The exci...
متن کاملDetermination of nutrient mass balance in turkeys.
Retention and excretion of phosphorus and nitrogen were determined for turkeys fed 2 diets at 3 ages, via mass balance based on the nutrient content of consumed feed, carcasses, and litter. The 2 diets consisted of an industry diet (IND) and a low phosphorus + 600 U of phytase/kg (LP) diet. A subsample of birds was weighed and killed at 12, 15, and 18 wk of age for nutrient retention (via whole...
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ژورنال
عنوان ژورنال: Geographica Helvetica
سال: 2010
ISSN: 2194-8798
DOI: 10.5194/gh-65-80-2010