| 1. |
- Andersson-Gäre, Boel, et al.
(författare)
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Incidence and prevalence of juvenile chronic arthritis : a population survey
- 1987
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Ingår i: Annals of the Rheumatic Diseases. - 0003-4967 .- 1468-2060. ; 46:4, s. 277-81
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Tidskriftsartikel (refereegranskat)abstract
- In a population based epidemiological survey of juvenile chronic arthritis (JCA), performed in Western Sweden in 1983, an incidence of 12/100,000 was found. The estimated prevalence was 56/100,000. Subgroup distribution showed a preponderance of mono- and pauciarticular forms. The peak age of onset was between 0 and 4 years of age. Girls predominated over boys in a ratio of 3:2. Overall, 30% were antinuclear antibody (ANA) positive, 9% rheumatoid factor (RF) positive, and eye involvement occurred in 10% of the children. The results suggest differences in population based studies of JCA compared with previously reported hospital based series.
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| 2. |
- Shiau, L. D., et al.
(författare)
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Growth kinetics of fructose crystals formed by contact nucleation
- 1987
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Ingår i: AIChE Journal. - : Wiley. - 0001-1541 .- 1547-5905. ; 33:6, s. 1028-1033
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Tidskriftsartikel (refereegranskat)abstract
- Despite the large number of recent secondary nucleation and growth rate studies with the sucrose-water system, few data are available on the fructose-water system. Fructose is much more soluble in water than sucrose. Since fructose is a monosaccharide constituting half of the sucrose molecule, it is reasonable to consider that similar phenomena may exist with respect to nucleation and growth in the two systems. It is the objective of this work to perform photomicroscopic experiments on the fructose-water system to study these nucleation and growth characteristics.
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| 3. |
- Shiau, L-D, et al.
(författare)
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Model for a cascade crystallizer in the presence of growth rate dispersion
- 1987
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Ingår i: Industrial & Engineering Chemistry Research. - : American Chemical Society (ACS). - 0888-5885 .- 1520-5045. ; 26:12, s. 2515-2521
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Tidskriftsartikel (refereegranskat)abstract
- A model is developed based on the population balance to relate the resulting crystal size distribution (CSD) from a cascade of mixed suspension, mixed product removal (MSMPR) crystallizers to the growth rate distributions of each stage. This model employs the constant crystal growth (CCG) model, in which it is assumed that an individual crystal has an inherent, constant growth rate, but different crystals might have different inherent growth rates. An explicit recursion formula between the first three moments of the resulting crystal size distribution and the first three moments of growth rate distributions of each stage is presented for a N-stage MSMPR crystallizer. A computer program has been developed to predict the CSD from a three-stage MSMPR crystallizer with continuous seeding into the first stage and growth in the subsequent stages. The model is solved simultaneously with the mass balance by using power law growth kinetics. The CSD in each stage is assumed as a gamma distribution to compute the mean crystal size, production rate, and coefficient of variance.
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