| 1. |
|
|
| 2. |
- Berggren, Anna M., et al.
(författare)
-
Short‐chain fatty acid content and pH in caecum of rats fed various sources of starch
- 1995
-
Ingår i: Journal of the Science of Food and Agriculture. - : Wiley. - 0022-5142 .- 1097-0010. ; 68:2, s. 241-248
-
Tidskriftsartikel (refereegranskat)abstract
- Caecal pH and contents of short‐chain fatty acids (SCFA) were registered in rats fed three potential sources of resistant starch (RS); raw pea starch, raw potato starch, and an RS‐enriched preparation obtained from wheat starch by autoclaving and enzymatic incubation. Small intestinal digestibility and delivery of RS to the hind‐gut in the case of raw starches were determined by analysis of faecal starch in animals treated with antibiotics to prevent hind‐gut fermentation. RS content in the RS‐enriched preparation was determined as total starch remaining in an enzymatic gravimetric dietary fibre residue. The fermentability of RS was estimated from the faecal recovery of starch in normal animals with intact hind‐gut microflora. Approximately 35 g per 100 g and 32 g per 100 g were RS in the case of raw potato starch and the RS‐enriched preparation, respectively, versus only 1 g per 100 g in the case of raw pea starch. The caecal pH decreased with all test diets, being most significant with raw potato starch. SCFA production and faecal bulking were negligible with raw pea starch, whereas both raw potato starch and the RS‐enriched preparation significantly increased these parameters. The fermentability of RS in raw potato starch and the RS‐enriched preparation was similar, or about 60–70%. If calculated on basis of fermented amount, RS in raw potato starch was more potent in generating SCFA (49 μmol g−1) than in the RS‐enriched preparation (19 μmol g−1). RS in raw potato starch also displayed the highest faecal bulking capacity. In fact, the faecal dry weight increased more than expected merely from delivery of RS. The relative proportion in caecal contents of acetic‐, propionic‐ and butyric acid was 70, 17 and 8%, respectively, with no significant differences between the three sources of RS.
|
|
| 3. |
- Dodabalapur, A., et al.
(författare)
-
Applied physics - Organic solid-state lasers : Past and future
- 1997
-
Ingår i: Science. - : American Association for the Advancement of Science. - 0036-8075 .- 1095-9203. ; 277:5333, s. 1787-1788
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Researchers around the world are seeking organic materials that can be made into practical and efficient lasers. In their Perspective, Dodabalapur et al. review the past history and future prospects of this important class of laser materials.
|
|
| 4. |
|
|
| 5. |
- Ostrick, J. R., et al.
(författare)
-
Conductivity-type anisotropy in molecular solids
- 1997
-
Ingår i: Journal of Applied Physics. - : American Institute of Physics (AIP). - 0021-8979 .- 1089-7550. ; 81:10, s. 6804-6808
-
Tidskriftsartikel (refereegranskat)abstract
- Thin polycrystalline films of perylenetetracarboxylic dianyhydride (PTCDA), an organic molecular solid, exhibits substantial anisotropies in its electronic transport properties. Only electrons transport in the directions along molecular planes, while mainly holes transport in the direction normal to molecular planes. A series of measurements on both field effect transistors with PTCDA active layers and light emitting diodes with PTCDA transport layers documents the anisotropy seen in the electronic transport in thin films of PTCDA. (C) 1997 American Institute of Physics.
|
|
| 6. |
- Samuelson, Gösta, 1930-, et al.
(författare)
-
Dietary iron intake and iron status in adolescents
- 1996
-
Ingår i: Acta Paediatrica. - 0803-5253 .- 1651-2227. ; 85:9, s. 1033-8
-
Tidskriftsartikel (refereegranskat)abstract
- The aim of this study was to evaluate the dietary iron intake of 15-year-old adolescents from two different regions of Sweden, in relation to their iron status. The study comprised 185 boys and 209 girls, randomly selected from the official population register. The iron intake was calculated from a 7-day record, and varied between 7 and 35 and 6 and 27 mg per day for boys and girls, respectively. The daily median intakes in boys and girls were 18.7 and 14.2 mg, respectively. S-ferritin, s-iron, and s-transferrin saturation, measured in all the subjects, did not differ significantly between the two regions. However, the mean serum ferritin concentration was significantly higher in the boys (36.4 micrograms l-1) than in the girls (29.4 micrograms l-1) (p < 0.001). Low s-ferritin levels, defined as s-ferritin < 12 micrograms l-1 were found in seven boys (3.7%) and in 29 girls (13.9%). None of the adolescents had iron deficiency anaemia, defined as Hb < 110 gl-1 in combination with s-ferritin < 12 micrograms l-1. Regression and correlation analyses did not show any significant correlation between dietary iron intake and s-ferritin, or between s-ferritin and haemoglobin (Hb), MCH and MCHC. A significant correlation was found, however, between s-ferritin and transferrin saturation (p < 0.005) in both sexes. When the adolescents who still had s-ferritin < 12 micrograms l-1 at a second blood examination were given a 6 weeks trial with oral iron therapy, all of them showed an increase both in s-ferritin and in blood Hb. The 95% confidence intervals of s-ferritin for 15-year-old Swedish boys and girls were defined as 11-90 and 7-85 micrograms l-1, respectively.
|
|
| 7. |
|
|
| 8. |
|
|
| 9. |
|
|
| 10. |
|
|
