(n.) A series of formative cells lying outside of the wood proper and inside of the inner bark. The growth of new wood takes place in the cambium, which is very soft.
(n.) A fancied nutritive juice, formerly supposed to originate in the blood, to repair losses of the system, and to promote its increase.
Example Sentences:
(1) The cells of the cambium layer are destroyed and the collagen of the fibrous layer undergoes depolymerization.
(2) By retaining the cortex, the cambium layer is preserved, and this is thought to have a better osteogenic capacity than vascularized periosteal grafts.
(3) Different stages of cellular development were identified in the botryoid sarcomas, with the most immature cells of the cambium layer devoid of external basement membrane around the tumor cells, although the stroma contained finely dispersed basement membrane material and some cells contained intracytoplasmic laminin or type IV collagen, indicative of the synthesis of these proteins.
(4) The maximal flavylogen concentrations were in the phloem and cambium from mature stems, where all three fractions were richly present.
(5) The specific activities and the activities per cell of these enzymes varied during differentiation of cambium to xylem according to the type polysaccharide synthesized.
(6) At the final stage of the differentiation of cambium to xylem there was a decrease in activity of the enzymes directly involved in producing the soluble precursors of pectin (DUP-D-galactose 4-epimerase and UDP-L-arabinose 4-epimerase and an increase in those producing the precursors of hemicellulose (UDP-D-glucose dehydrogenase and UDP-D-glucuronate decarboxylase).
(7) In 17 experiments the periosteum was wrapped around the grafts with the cambium layer facing the bone, and in seven experiments with the cambium layer facing the muscle.
(8) In 17 adolescent rabbits, a rectangular graft of periosteum was elevated from the medial aspect of each proximal tibia and folded back on itself so that its deep (cambium) layer was facing outward on both sides.
(9) The purpose of this study was to determine if the hyaline-like cartilage produced in major full-thickness defects of a joint surface, treated by a free periosteal graft and subjected to continuous passive motion (CPM), originated exclusively from the progenitor cells of the cambium of the graft.
(10) A graft of periosteum from the proximal tibia was wrapped around a disc of bone from the same area (cambium layer of the periosteum facing outward), then press-fitted into the defect.
(11) The cambium then regenerates along a path where the ratio of auxin to sucrose concentration is similar to that at the original cambium, and its orientation (as regards xylem and phloem formation) is determined by the direction of the gradient in this ratio.
(12) Heterotopically-induced bones are not covered by a periosteal membrane with a functioning cambium layer.
(13) Maintenance of integrity of the cambium layer of the periosteal graft is emphasized.
(14) A similar increase has been found for the ratios determined for xylem tissue compared with those for cambium.
(15) Apart from the superficial epithelium the lesions can be subdivided into a subepithelial myxoid-fibrous zone followed by a proliferative capillary fibroblastic cambium layer.
(16) The new bone was formed by the osteogenic cells of the cambium layer in both types of graft.
(17) The capillary fibroblastic cambium zone disappears and areas of hyalinization are enlarged.
(18) In Series 1 with the cambium layer of the periosteum facing the bone, after 20 weeks a tubular bone with Haversian system and bone marrow was seen.
(19) There was intense proliferation in the cells of the cambium layer of the periosteum, with differentiation to chondroblasts and osteoblasts, suggesting that this layer was the primary tissue responsible for development of the callus.
(20) Degranulating MCs conversely decreased near the cambium layer of the periosteum.
Procambium
Definition:
(n.) The young tissue of a fibrovascular bundle before its component cells have begun to be differentiated.
Example Sentences:
(1) Light and electron microscopical studies showed that, during preculture, procambium cells of embryos became highly susceptible to Agrobacterium infection.
(2) Lateral and intermediate veins are initiated in this central layer, most often by divisions which contribute daughter cells to both the procambium and the ground meristem.