Mindblown: a blog about philosophy.
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Lysis
The process of cell dissolution; the action of a lysin. The killing of a cell via destruction of the cell membrane. The process of cell disintegration; membrane rupturing; breaking up the cell wall. Destruction of red blood cells, bacteria, and other structures. The destruction of bacteria by a bacteriophage. The destruction of a cell by…
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Lyophilization
Creation of a stable preparation of a biologic substance (e.g., blood plasma, serum) by rapid freezing followed by dehydration under high vacuum. The process of removing water from a frozen biomaterial (e.g., a microbial culture or an aqueous protein solution) via application of a vacuum. It is a drying method for long-term preservation of proteins…
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Lymphotoxin
A lymphokine that results in direct cytolysis following its release from stimulated lymphocytes; also termed tumor necrosis factor beta.
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Lymphokine
Soluble factors released from lymphocytes that transmit signals for growth and differentiation of various cell types. Peptides and proteins secreted by (immune system response) stimulated T cells. These hormone-like (peptide and protein) molecules direct the movements and activities of other cells in the immune system. Some examples of lymphokines are interleukin-1, interleukin-2, tumor necrosis factor…
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Lymphocyte
Mononuclear, nonphagocytic leukocyte that originates from stem cells and differentiates in lymphoid tissue (as of the thymus or bone marrow). It is the typical cellular elementsof lymph and constitutes 20–30% of the white blood cells of normal human blood. Divided on the basis of ontogeny and function into two classes: B, T lymphocytes, responsible for…
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Luxation
Dislocation or displacement. Partial or complete dislocation of a tooth from its alveolus. Misalignment, displacement, or dislocation of an organ or joint. Displacement of organs or articular surfaces; complete dislocation of a joint.
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luting agent
Any material used to attach or cement indirect restorations to prepared teeth. A compound used in dentistry to bond surfaces together and make them impermeable. Compounds identified as luting agents may be cements, resins, or glass ionomers.
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Lute
To attach two surfaces by means of a cement or other adhesive material.
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Luminance
The intensity of light emitted from a surface per unit area.
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Lucia jig
Eponym (Victor O. Lucia) for an anterior muscle programming device used to obtain an accurate dental arch centric relationship by allowing the condyles to seat in their most superior position.
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