| 1. |
- Deodhar, Ganesh Bhaskar
(författare)
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Fine structure of K-absorption limit of silicon oxide
- 1930
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Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 125, s. 777-778
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Tidskriftsartikel (refereegranskat)abstract
- THAT the X-ray absorption limits are not simple but show a rather complicated structure has been known now for some time. The main difficulties in their experimental investigation are in respect of (1) amount of the absorbing substance, and (2) dispersion of the spectrograph. The amount of the absorber must not be either too great or too small, otherwise the details are lost. Secondly, the dispersion must be made as large as possible to bring out all the details and measure them with the usual accuracy.
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| 2. |
- Pedersen, Kai O.
(författare)
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Sedimentation equilibrium measurements with low molecular substances in the ultra-centrifuge
- 1935
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Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 135, s. 304-305
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Tidskriftsartikel (refereegranskat)abstract
- The calculated molecular weights agreed fairly well with the known values for these substances except in the cases of the substance with the lowest molecular weight, CsCl, where the difference in concentration was very small. Quite recently, Prof. Svedberg has greatly improved his ultra-centrifuge (see Svedberg, loc.
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| 3. |
- Pedersen, Kai O.
(författare)
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Temperature stability and denaturation of serum albumin
- 1931
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Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 128, s. 150-151
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Tidskriftsartikel (refereegranskat)abstract
- It has been shown by Svedberg and Sjögren1 that at ordinary temperature serum albumin is stable (that is, homogeneous with regard to molecular weight) in a region of pH varying between 4 and 9. These authors have also shown that outside of the stability region, but not too far from it, the serum albumin molecule is dissociated into smaller molecules. This first stage of breaking up of the molecule probably means the formation of particles of half the weight of the original molecule. The complete breaking up of the molecule follows immediately after this stage. The first stage has been shown to be reversible with regard to the molecular weight.
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| 4. |
- Svedberg, The
(författare)
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Determination of the molecular weight of insulin
- 1931
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Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 127, s. 438-439
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Tidskriftsartikel (refereegranskat)abstract
- AT the suggestion of Dr. H. Jensen, of the Johns Hopkins University, Baltimore, an ultracentrifugal investigation of insulin has been carried out in my laboratory by Mr. B. Sjögren. A quantity of 0.25 gm. crystalline insulin was kindly put at my disposal by Dr. Jensen, and this small sample proved sufficient for a fairly complete study of the molecular weight and pH-stability region of insulin.
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| 5. |
- Tiselius, Arne
(författare)
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Diffusion of water in a zeolite crystal
- 1934
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Ingår i: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 133, s. 212-213
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Tidskriftsartikel (refereegranskat)abstract
- I have made an attempt to study this migration quantitatively. For this purpose I have chosen an optical method, which makes a direct observation of the migration possible.
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