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Items: 1 to 50 of 106

1.

Macroevolution and microevolution. Macromutations and micromutations.

Løvtrup S.

Riv Biol. 1999 Sep-Dec;92(3):516-8. No abstract available.

PMID:
10765686
2.

The four theories of evolution. Epilogue.

Løvtrup S.

Riv Biol. 1999 Sep-Dec;92(3):478-80. No abstract available.

PMID:
10765679
3.

Biodynamics of living cells: the molecule-contraction theory.

Løvtrup S.

Physiol Chem Phys Med NMR. 1992;24(2):119-43; discussion 144-6.

PMID:
1508988
4.

Development of chicken embryos in a pulsed magnetic field.

Berman E, Chacon L, House D, Koch BA, Koch WE, Leal J, Løvtrup S, Mantiply E, Martin AH, Martucci GI, et al.

Bioelectromagnetics. 1990;11(2):169-87. Erratum in: Bioelectromagnetics 1991;12(4):259.

PMID:
2242052
5.

The morphogenesis of molluscan shells: a mathematical account using biological parameters.

Løvtrup S, Løvtrup M.

J Morphol. 1988 Jul;197(1):53-62.

PMID:
3184193
6.

Factors involved in the formation and stabilization of cell aggregates obtained from amphibian embryonic explants.

Mattsson MO, Løvtrup-Rein H, Løvtrup S.

Cell Differ. 1988 Mar;23(1-2):69-76.

PMID:
3370680
7.

Philosophy and evolution. Comments on Michael Ruse: Karl Popper's philosophy of biology.

Løvtrup S.

Riv Biol. 1988;81(2):287-308. English, Italian. No abstract available.

PMID:
3201070
8.

Autoneuralization in the amphibian ectoderm--a species-specific and stage-specific phenomenon.

Mattsson MO, Nakatsuji N, Løvtrup S.

Exp Cell Biol. 1987;55(3):145-51.

PMID:
3311847
9.

Cyclic AMP and cell differentiation in amphibian embryonic explants.

Mattsson MO, Løvtrup S.

Exp Cell Biol. 1986;54(2):106-11.

PMID:
3011532
10.

Movement and structure of water in animal cells. Ideas and experiments.

Mild KH, Løvtrup S.

Biochim Biophys Acta. 1985 Sep 9;822(2):155-67. Review. No abstract available.

PMID:
3896316
11.

The amphibian chorda-mesoderm. A semantic puzzle.

Løvtrup S.

Riv Biol. 1985 Autumn;78(3):409-14. English, Italian. No abstract available.

PMID:
4089462
12.

Terminological confusion in evolutionary thought.

Løvtrup S.

Riv Biol. 1985 Summer;78(2):211-25. English, Italian. No abstract available.

PMID:
4035250
13.

Effects of protracted exposure to low intensity radio frequency fields on CHO cells in culture.

Mild KH, Sandström M, Odeblad E, Asberg K, Løvtrup S.

Physiol Chem Phys Med NMR. 1985;17(1):61-9.

PMID:
4034680
14.

Theories of preformation of encasement, etc. and cellular differentiation.

Cappelletti V, Condorelli L, Giolitti G, Giudice G, Løvtrup S, Ranzi S, Sermonti G, Spirito A.

Riv Biol. 1985 Winter;78(4):585-613. English, Italian. No abstract available.

PMID:
3832346
15.

Sulfated polysaccharides and cell differentiation in the sea urchin embryo.

Løvtrup-Rein H, Løvtrup S.

Exp Cell Biol. 1984;52(6):383-8.

PMID:
6238860
16.

Epigenetic mechanisms in the early amphibian embryo: cell differentiation and morphogenetic elements.

Løvtrup S.

Biol Rev Camb Philos Soc. 1983 Feb;58(1):91-130. Review. No abstract available.

PMID:
6338944
17.

Reduction and emergence.

Løvtrup S.

Riv Biol. 1983 Autumn;76(3):437-61. English, Italian. No abstract available.

PMID:
6648255
18.
19.

The four theories of evolution, III. The ecological theory.

Løvtrup S.

Riv Biol. 1982 Autumn;75(3):385-409. English, Italian. No abstract available.

PMID:
7146764
20.

The four theories of evolution. I. The theories on the reality and on the history of evolution.

Løvtrup S.

Riv Biol. 1982 Spring;75(1):53-66. English, Italian. No abstract available.

PMID:
7100779
21.

Morphological differentiation of mitochondria in the early amphibian embryo.

Nelson L, Lorentzon R, Boquist L, Løvtrup S.

Exp Cell Res. 1982 Jan;137(1):25-9. No abstract available.

PMID:
7056285
22.

Cell physiological effects of radiofrequency electromagnetic fields.

Mild KH, Sandström M, Løvtrup S.

Physiol Chem Phys. 1982;14(1):31-9.

PMID:
6983695
23.

Development of Xenopus laevis embryos in a static magnetic field.

Mild KH, Sandström M, Løvtrup S.

Bioelectromagnetics. 1981;2(2):199-201. No abstract available.

PMID:
7295366
24.

Energy sources in the sea urchin embryo: a critique of current views.

Løvtrup-Rein H, Løvtrup S.

Acta Embryol Morphol Exp. 1980 Oct;1(2):93-101. No abstract available.

PMID:
7331678
25.

Fate maps and cell differentiation in the amphibian embryo--an experimental study.

Landström U, Løvtrup S.

J Embryol Exp Morphol. 1979 Dec;54:113-30.

26.

High density cell water in amphibian eggs?

Mild KH, Løvtrup S, Forslind E.

J Exp Biol. 1979 Dec;83:305-14.

27.

Tyrosine and the synthesis of melanin in embryonic cells fromAmbystoma mexicanum.

Landström U, Løvtrup S.

Wilehm Roux Arch Dev Biol. 1978 Sep;185(3):201-207. doi: 10.1007/BF00848351.

PMID:
28304987
28.

Metabolism of cold-stored pancreatic islets.

Frankel BJ, Gylfe E, Hellman B, Idahl LA, Landström U, Løvtrup S, Sehlin J.

Diabetologia. 1978 Sep;15(3):187-90.

PMID:
359395
29.

Lactate--a suppressor of differentiation in embryonic cells.

Løvtrup-Rein H, Landström U, Løvtrup S.

Cell Differ. 1978 Jun;7(3):131-8.

PMID:
78767
30.

Robert Chambers, Charles Darwin and the mechanism of evolution.

Løvtrup S.

Bull Biol Fr Belg. 1978;112(2):113-28. No abstract available.

PMID:
385078
31.

Preliminary observations on the synthesis of glycosaminoglycans in the sea urchin embryo.

Nakatsuji N, Løvtrup S.

Arch Anat Microsc Morphol Exp. 1978;67(3):185-9.

PMID:
157101
32.

Is heparan sulphate the agent of the amphibian inductor?

Landström U, Lovtrup S.

Acta Embryol Exp (Palermo). 1977 Sep;(2):171-8. No abstract available.

PMID:
144395
33.

Deoxynucleoside inhibition of differentiation in cultured embryonic cells.

Landström U, Lovtrup S.

Exp Cell Res. 1977 Aug;108(1):201-6. No abstract available.

PMID:
891629
34.
35.

Letter to the editor: An addendum to "D'Arcy Thompson's theorems and the shape of the molluscan shell".

Lovtrup S, von Sydow B.

Bull Math Biol. 1976;38(3):321-2. No abstract available.

PMID:
1268385
36.

Changes in acid mucopolysaccharides during the development of the frog Rana temporaria.

Höglund LR, Lovtrup S.

Acta Embryol Exp (Palermo). 1976;(1):63-79. No abstract available.

PMID:
132835
37.

Acid mucopolysaccharides in the skin of some lower vertebrates (hagfish, lamprey and Chimaera).

Rahemtulla F, Höglund NG, Lovtrup S.

Comp Biochem Physiol B. 1976;53(3):295-8. No abstract available.

PMID:
130223
38.

The comparative biochemistry of invertebrate mucopolysaccharides-VI. Crustacea.

Rahemtulla F, Lovtrup S.

Comp Biochem Physiol B. 1976;53(1):15-8. No abstract available.

PMID:
129314
39.

Control of cell division and cell differentiation by deoxynucleotides in the early embryo of Xenopus laevis.

Landström U, Løvtrup-Rein H, Løvtrup S.

Cell Differ. 1975 Dec;4(5):313-25.

PMID:
1203982
40.

Changes in the content of cyclic AMP and cyclic GMP during the development of Xenopus laevis.

Lovtrup-Rein H, Lovtrup S.

Exp Cell Res. 1975 Aug;94(1):216-20. No abstract available.

PMID:
172338
41.

On the determination of the dorso-ventral polarity in Xenopus laevis embryos.

Landström U, Lovtrup S.

J Embryol Exp Morphol. 1975 Jul;33(4):879-95.

42.

The comparative biochemistry of invertebrate mucopolysaccharides. IV. Bivalvia. Phylogenetic implications.

Rahemtulla F, Lovtrup S.

Comp Biochem Physiol B. 1975 Apr 15;50(4):631-5. No abstract available.

PMID:
123494
43.

The comparative biochemistry of invertebrate mucopolysaccharides--III. Oligocheta and Hirudinea.

Rahemtulla F, Lovtrup S.

Comp Biochem Physiol B. 1975 Apr 15;50(4):627-9. No abstract available.

PMID:
123493
44.

Fate maps and gastrulation in Amphibia--a critique of current views.

Lovtrup S.

Can J Zool. 1975 Apr;53(4):473-9. No abstract available.

PMID:
1131746
45.

Diffusion and permeation of water in the frog egg. The effect of temperature.

Mild KH, Lovtrup S.

Biochim Biophys Acta. 1974 Dec 24;373(3):383-96. No abstract available.

PMID:
4547977
46.

The comparative biochemistry of invertebrate mucopolysaccharides II. Nematoda; Annelida.

Rahemtulla F, Lovtrup S.

Comp Biochem Physiol B. 1974 Dec 15;49(4):639-46. No abstract available.

PMID:
4279797
47.

The comparative biochemistry of invertebrate mucopolysaccharides. I. Methods; Platyhelminthes.

Rahemtulla F, Lovtrup S.

Comp Biochem Physiol B. 1974 Dec 15;49(4):631-7. No abstract available.

PMID:
4279796
48.

Diffusion and permeation of water in the frog egg: the effect of tension and tonicity.

Hansson K, Lovtrup S.

J Exp Biol. 1974 Dec;61(3):697-703. No abstract available.

49.

On the mechanical properties of the vitelline membrane of the frog egg.

Mild KH, Lovtrup S, Bergfors T.

J Exp Biol. 1974 Jun;60(3):807-20. No abstract available.

50.

Changes in the content of ATP and GTP during the development of X.

Lovtrup-Rein H, Nelson L, Lovtrup S.

Exp Cell Res. 1974 May;86(1):206-9. No abstract available.

PMID:
4831160

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