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Anton van Leeuwenhoek

... Anton van Leeuwenhoek Anton van Leeuwenhoek ( October 24 , 1632 - August 26 , ... Philipszoon . His letters were signed Antoni van Leeuwenhoek . He was probably known as ...

Microscope

... that uses only one lens for magnification. van Leeuwenhoek 's microscopes consisted of a single, ... compared to modern widefield oculars. Anton van Leeuwenhoek (1632-1723) is generally credited ... bowls had been described by the Romans (Seneca). van Leeuwenhoek's home-made microscopes were actually ...

Photosynthesis

... from the carbon dioxide that plants use. This was first proposed by C. B. van Neil in the 1930s, who studied photosynthetic bacteria. Aside from the ... overall photosynthetic equation has been known since the 1800s . Jan van Helmont began the research of the process off in the mid-1600s when he, ...

Lipase

... lipase. Nature 343:767-70. Carriere, F., C. Withers-Martinez, H. van Tilbeurgh, A. Roussel, C. Cambillau, and R. Verger. 1998. Structural basis ... Leukot Essent Fatty Acids 69:87-97. Egmond, M. R., and C. J. van Bemmel. 1997. Impact of Structural Information on Understanding of ...

Photosynthesis

... from the carbon dioxide that plants use. This was first proposed by C. B. van Neil in the 1930s, who studied photosynthetic bacteria. Aside from the ... overall photosynthetic equation has been known since the 1800s . Jan van Helmont began the research of the process off in the mid-1600s when he, ...

Abiogenesis

... ovo , every living thing came from a pre-existing living thing. The discovery of the microscope carried the refutation further. In 1683 Antoni van Leeuwenhoek discovered bacteria, and it was soon found that however carefully organic matter might be protected by screens, or by being placed in ...

Active site

... and key model and the induced fit model whereby the active site binds and encloses the substrate molecule. Often enzymes bond to their substrate by van der Waals forces or hydrogen bonds between the R' groups in the amino acid monomers. ...

Amino acid

... 9.21 10.46 Amino Acid hydrophobic positive negative polar charged small tiny aromatic aliphatic van der Waals volume Ala X - - - - X X - - 67 Cys X - - - - X - - - 86 ...

Bacterium

... also 9 References 10 Further reading 11 External links History and taxonomy The first bacteria were observed by Antony van Leeuwenhoek in 1683 using a single-lens microscope of his own design. The name bacterium was introduced much later, by Ehrenberg in 1828 , ...

Chromatin

... types of chromatin can be distinguished: Euchromatin Heterochromatin See also chromosome chromatid genetics Reference van Holde KE. 1989 . Chromatin. New York : Springer-Verlag . ISBN 0387966943 . External links Recent chromatin publications and news ...

Double helix

... bonds . Each strand forms a helix, and the two helices are held together through hydrogen bonds , ionic forces, hydrophobic interactions, and van der Waals forces forming a double helix. ...

Down syndrome

... Levitz, M. (1994) San Diego, CA, USA: Harcourt Brace. Medical and Surgical Care for Children with Down Syndrome: A Guide for Parents. (1995) van Dyke, D. C., Mattheis, P. J., Schoon Eberly, S., and Williams, J. Bethesda, MD, USA: Woodbine House. Adolescents with Down Syndrome: Toward a ...

Bacterium

... also 9 References 10 Further reading 11 External links History and taxonomy The first bacteria were observed by Antony van Leeuwenhoek in 1683 using a single-lens microscope of his own design. The name bacterium was introduced much later, by Ehrenberg in 1828 , ...

Promoter

... 77 (9), 2054-2058. Rubinstein-Taybi Syndrome case study: Petrij F, Giles RH, Dauwerse HG, Saris JJ, Hennekam RC, Masuno M, Tommerup N, van Ommen GJ, Goodman RH, Peters DJ, et al. (1995). Rubinstein-Taybi syndrome caused by mutations in the transcriptional co-activator CBP . Nature . ...

Red Queen

... in commercial product markets and competition between people in society for wealth or esteem, but, most famously, the idea was introduced by Leigh van Valen to the discussion of arms races in the biological theory of evolution by natural selection. The recognition of a simple example of a ...

Signal transduction

... of a hormone by the hormone receptor uses the same (non- covalent ) mechanisms, such as hydrogen bonds , electrostatic forces, hydrophobe and van der Waals forces . The equivalent between receptor-bound and free hormone equals [H] + [R] [HR] , with [R]=receptor; [H]=free hormone; ...

Sperm

... is determined by the sperm, through the chromosomal pair "XX" (for a female ) or "XY" (for a male ). Sperm cells were first observed by Antoni van Leeuwenhoek in 1679 . Contents showTocToggle("show","hide") 1 Sperm structure and size 2 Sperm production 3 See also ...

Wavelength

... External link Conversion: Wavelength to frequency and vice versa - The calculator Wavelength is the title of a 1978 album by van Morrison . ...

Zoology

... Desmond Morris ( ethology ) Thomas Say ( entomology ) E. O Wilson , b. 1929 , ( entomology , founder of sociobiology ) Jakob van Uexkll (animal behavior, invertebrate zoology ) See also botany - the area of biology which studies plants list of biologists ...
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