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bionity.com's Life Science Encyclopedia provides articles for 57,945 entries from biotechnology, pharmaceutics, medicine and biology as well as related scientific disciplines.

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Nicotinamide adenine dinucleotide

Nicotinamide adenine dinucleotide Nicotinamide adenine dinucleotide, abbreviated NAD+, is a coenzyme found in all living cell s. The compound is a dinucleotide, since it consists of two nucleotide s joined through their phosphate groups: with one nucleotide containing an adenosine ring, and the more

Flight feather

Flight feather (Milvus milvus) in flight, showing remiges and rectrices Flight feathers are the long, stiff, asymmetrically shaped, but symmetrically paired feather s on the wing s or tail of a bird ; those on the wings are called remiges (singular remex) while those on the tail are called rectri more

Immune system

Immune system image of a single neutrophil (yellow), engulfing anthrax bacteria (orange). An immune system is a collection of mechanisms within an organism that protects against disease by identifying and killing pathogen s and tumor cells. It detects a wide variety of agents, from virus es to more

Tuberculosis

Tuberculosis Tuberculosis (abbreviated as TB for tubercle bacillus or Tuberculosis) is a common and deadly infectious disease caused by mycobacteria , mainly Mycobacterium tuberculosis . Tuberculosis most commonly attacks the lungs (as pulmonary TB) but can also affect the central nervous syst more

Chromatophore

Chromatophore chromatophores mediate background adaptation on exposure to dark (top) and light environments (bottom). Chromatophores are pigment -containing and light-reflecting cells found in amphibian s, fish , reptile s, crustacean s, and cephalopod s. They are largely responsible for generati more

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