| Golgi type I neuron | <physiology> Nerve cells whose long axons leave the gray matter of which they form a part. (05 Mar 2000) |
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| Golgi zone | <cell biology> Part of the cytoplasm occupied by the Golgi apparatus, in secretory cells of exocrine glands, a zone between the nucleus and the luminal surface. (05 Mar 2000) |
| Holmgren-Golgi canals | <cell biology> Intracellular stack of membrane bounded vesicles in which glycosylation and packaging of secreted proteins takes place. Part of the GERL complex. Synonym: Golgi body, Golgi vesicles, dictyosome (in plants), parabasal body (in flagellate protozoa). (11 Jan 1998) |
| trans Golgi network | <cell biology> A complex of membranous tubules and vesicles, near the trans face of the Golgi, which is thought to be a major intersection for intracellular traffic of vesicles. (18 Nov 1997) |
| trans-Golgi reticulum | That part of the Golgi apparatus that takes newly processed proteins and delivers them to secretory vesicles that will fuse with other biomembranes (e.g., the plasma membrane). (05 Mar 2000) |
| acetone fixative | Acetone used at low temperatures to fix enzymes, particularly phosphatases; it removes fat and glycogen. (05 Mar 2000) |
| Altmann's fixative | A bichromate-osmic acid fixative. (05 Mar 2000) |
| Bouin's fixative | A solution of glacial acetic acid, formalin, and picric acid, useful for soft and delicate tissues (as those of embryos) and small pieces of tissues; it preserves glycogen and nuclei and permits brilliant staining, but penetrates slowly, distorts kidney tissue and mitochondria, and does not permit Feulgen stain for DNA. (05 Mar 2000) |
| Carnoy's fixative | Ethanol, chloroform, and acetic acid (6:3:1) or ethanol and acetic acid (3:1), an extremely rapid fixative used for glycogen preservation and as a nuclear fixative. (05 Mar 2000) |
| Marchi's fixative | A mixture of Muller's fixative with osmium tetroxide, with potassium chlorate substituted for the potassium dichromate of Muller's fixative for better results; used to demonstrate degenerating myelin. See: Marchi's stain. (05 Mar 2000) |
| Park-Williams fixative | A fixative for spirochetes, comprised of a 2% solution of osmic acid to the fumes of which the bacteria are exposed for a few seconds. (05 Mar 2000) |
| Regaud's fixative | A fixative containing formaldehyde and sodium dichromate, used to preserve mitochondria but not fat; requires afterchroming and extensive washing. (05 Mar 2000) |
| glutaraldehyde fixative | A fixative used in phosphate or cacodylate buffer for electron microscopy, and as a chromatin and enzyme fixative; may be used preceding osmic acid as a second fixative to add membrane preservation for electron microscopy. (05 Mar 2000) |
| Champy's fixative | A mixture of potassium bichromate, chromic acid, and osmic acid, considered an excellent cytologic fixative with advantages and disadvantages similar to those of Flemming's fixative; it differs from Flemming's fixative in substituting bichromate for acetic acid. (05 Mar 2000) |
| methanol fixative | A fixative used with dry blood films, and often incorporated into the stain used. (05 Mar 2000) |