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Optical in Biological Definition

Brain

... lobes that are flanked by two large optical lobes on the left and right (Butler, 2000). ... the brain can be divided into four parts, the optical lobes, the protocerebrum, the deutocerebrum, and the tritocerebrum. The optical lobes are positioned behind each eye and process ...

Microscope

... the first to be invented—is the optical microscope . This is an optical instrument containing one or more lenses ... showTocToggle("show","hide") 1 Simple optical microscope 2 ...

Optical spectrum

... The optical spectrum ( light or visible spectrum ) is the ... human eye . There are no exact bounds to the optical spectrum; a typical human eye will respond to ... at ~555 nm , in the yellow region of the optical spectrum. Wavelengths visible to the eye are ...

Amino acid

... , hydrophilic ( polar ), and hydrophobic ( nonpolar ). Isomerism Except for glycine , where R = H, amino acids occur in two possible optical isomers , called D and L. L amino acids represent the vast majority of amino acids found in proteins . D amino acids are found in some proteins ...

Anton van Leeuwenhoek

... was born in a house at the corner of Lion's Gate in Delft. Van Leeuwenhoek translates as "from lion's corner". Van Leeuwenhoek ground over 500 optical lenses during his lifetime. His microscope was used and improved by Christiaan Huygens for his own investigations into microscopy. He was ...

Bacterium

... 1998;180:4765-4774. Fulltext / PMID 9733676 . External links Tree of Life Videos of bacteria swimming and tumbling, use of optical tweezers and other fine videos. Bacterial Nomenclature Up-To-Date from DSMZ ...

Biological tissue

... , or, in connection with disease, histopathology . The classical tools for studying the tissues are the wax block, the tissue stain, and the optical microscope , though developments in electron microscopy , immunofluorescence, and frozen sections have all added to the sum of knowledge in the last ...

Biophysics

... gel blotting, fluorescence labeling and in vivo staining are used so that experimental results are observable with an unaided eye or, at most, optical magnification . Using these techniques, biologists attempt to elucidate the complex systems of interactions that give rise to the processes that ...

Chromosome

... chromosomes are condensed and called metaphasic chromosomes. This is the only natural context in which individual chromosomes are visible with an optical microscope . Prokaryotes do not possess histones or nuclei. In its relaxed state, the DNA can be accessed for transcription , regulation, and ...

Diabetes mellitus

... hours or minutes. If left untreated this can result in diabetic coma and death. A blood glucose test strip for an older style (ie, optical color sensing) monitoring system Prolonged and elevated levels of glucose in the blood, which is left unchecked and untreated will, over time, ...

Diffusion

... diffusion of a solute across a selectively permeable membrane . Photon diffusion When photons travel through a material with a high optical depth and a very short mean free path , their behavior is dominated by scattering and the path of any given photon's path is effectively a ...

Bacterium

... 1998;180:4765-4774. Fulltext / PMID 9733676 . External links Tree of Life Videos of bacteria swimming and tumbling, use of optical tweezers and other fine videos. Bacterial Nomenclature Up-To-Date from DSMZ ...
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