1,964 research outputs found
Practical research on TOC removal by ion exchange and the prevention of corrosion : cases for water-link tap water and wastewater effluent after RO treatment
The Oslo Health Study: A Dietary Index Estimating Frequent Intake of Soft Drinks and Rare Intake of Fruit and Vegetables Is Negatively Associated with Bone Mineral Density
Background.
Since nutritional factors may affect bone mineral
density (BMD), we have investigated
whether BMD is associated with an index estimating
the intake of soft drinks, fruits, and vegetables. Methods.
BMD was measured in
distal forearm in a subsample of the population-based Oslo Health
Study. 2126 subjects had both valid BMD
measurements and answered all the questions
required for calculating a Dietary
Index = the sum of intake estimates of
colas and non-cola beverages divided by the sum
of intake estimates of fruits and vegetables. We
did linear regression analyses to study whether
the Dietary Index and the single food items
included in the index were associated with BMD.
Results. There was a consistent
negative association between the Dietary Index
and forearm BMD. Among the single index
components, colas and non-cola soft drinks were
negatively associated with BMD. The negative
association between the Dietary Index and BMD
prevailed after adjusting for gender, age, and
body mass index, length of education, smoking,
alcohol intake, and physical activity.
Conclusion. An index reflecting
frequent intake of soft drinks and rare intake
of fruit and vegetables was inversely related to
distal forearm bone mineral
density
Degradation of the mechanical integrity of steam turbine steels due to stress-corrosion cracking in acidic water
High-performance fixed-bed in situ mass analyzer - ISMA
We demonstrate a newly developed high-performance fixed-bed reactor combined with an in situ mass analyzer (ISMA). The ISMA is particularly relevant to sub-second time-resolved studies where mass changes occur due to, e.g., chemical reactions and process conditions such as choice of solid, temperature, gas atmosphere, and pressure. The mass is determined from the optically measured oscillation frequency of a quartz element, yielding a mass resolution below 10 μg—typically 2–3 μg—for samples up to ∼500 mg. By placing the quartz element and optical sensor inside stainless steel pipes and providing heat from the outside, the instrument is applicable up to ∼62 bars and 700 °C. By surrounding this core part of the instrument with a suitable feed system and product analysis instruments, in combination with computer control and logging, time-resolved studies are enabled. The instrument with surrounding feed and product analysis infrastructure is fully automated. Emphasis has been put on making the instrument robust, safe, operationally simple, and user-friendly. We demonstrate the ISMA instrument on selected samples.acceptedVersio
Biocompatible Magnesium Alloys as Degradable Implant Materials - Machining Induced Surface and Subsurface Properties and Implant Performance
Evaluation and comparison of different machine learning approaches to auditory spectro-temporal receptive field estimation
Treatment of NH4NO3 laden condensate for re-use as boiler feed water : from lab to pilot scale
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