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Qu'est-ce (qui) est protoplasm - définition

PART OF CELL

Protoplasmic; Bioplasm

Protoplasm

·noun The viscid and more or less granular material of vegetable and animal cells, possessed of vital properties by which the processes of nutrition, secretion, and growth go forward; the so-called " physical basis of life;" the original cell substance, cytoplasm, cytoblastema, bioplasm sarcode, ·etc.

protoplasm

['pr??t?(?)?plaz(?)m]

¦ noun Biology the colourless material comprising the living part of a cell, including the cytoplasm, nucleus, and other organelles.

Derivatives

protoplasmic adjective

Origin

C19: from Gk protoplasma (see proto-, plasma).

Protoplasm

Protoplasm (; ) is the living part of a cell that is surrounded by a plasma membrane. It is a mixture of small molecules such as ions, monosaccharides, amino acid, and macromolecules such as proteins, polysaccharides, lipids, etc.

https://en.wikipedia.org/wiki/Protoplasm

Wikipédia

Protoplasm

Protoplasm (; PL protoplasms) is the living part of a cell that is surrounded by a plasma membrane. It is a mixture of small molecules such as ions, monosaccharides, amino acid, and macromolecules such as proteins, polysaccharides, lipids, etc.

In some definitions, it is a general term for the cytoplasm (e.g., Mohl, 1846), but for others, it also includes the nucleoplasm (e.g., Strasburger, 1882). For Sharp (1921), "According to the older usage the extra-nuclear portion of the protoplast [the entire cell, excluding the cell wall] was called "protoplasm," but the nucleus also is composed of protoplasm, or living substance in its broader sense. The current consensus is to avoid this ambiguity by employing Strasburger's (1882) terms cytoplasm [coined by Kölliker (1863), originally as synonym for protoplasm] and nucleoplasm [term coined by van Beneden (1875), or karyoplasm, used by Flemming (1878)]." The cytoplasm definition of Strasburger excluded the plastids (Chromatoplasm).

Like the nucleus, whether to include the vacuole in the protoplasm concept is controversial.

https://en.wikipedia.org/wiki/Protoplasm

Exemples du corpus de texte pour protoplasm

1. We need to remember the various discarded toys of science – the humours, the four elements, phlogiston, the ether and, more recently, protoplasm.

2. "I‘m not going to make predictions at this point whether this is the protoplasm of a new OSCE," Hill said, referring to the Organization for Security and Cooperation in Europe, a regional group that some see as a model for Northeast Asia.