Histology structure

Figure 7.3. The upper ponion is a montage of photomicrographs of a typical Snake Hill femoral cortex, running from the periosteal (left) to the endosteal (right) surfaces. A dashed line connects the post-mortem crack seen on the gross specimen to the magnified crack in the montage. Letters mark the commonly observed layers A = very thin, well preserved periosteal layer B = cloudy, poorly preserved structures C = relatively well preserved midcortical bone D = poorly preserved endosteal layer. Preservation" in this context refers to visibility of histological structures.

To elucidate the contribution of the different histological structures to the average Raman spectral signatures from intact pollen grains, we conducted spatially resolved measurements on sections of rye pollen grains. Such mapping experiments can help separation of predominant spectral contributions from different substructures. 

Radnot M, Varga M. Structure histologique de la cataracte causee par le piperazine. [Histologic structure of cataracts caused by piperazine.] Ann Ocul (Paris) 1969 202(4) 325-9. 

The histological structure of wool fibre comprises consisting three layers the scaly covering layer (cuticle), the fibrous fibrillar layer (cortex) and medullary layer (medulla). Fig. 1 - 5 shows the diagarm of wool fibre showing fibre morphology... 

Wennberg and Nyman (2004) indicated that high-pressure treatment produced white cabbage with specific properties in terms of nutrition and function. The proportion of soluble fiber was reduced with an increase in pressure up to 500 MPa however, the total fiber content remained constant. The reduction in soluble fiber content (or increase in insoluble content) due to high-pressure application was dependent on the initial levels of insoluble fiber and enzyme activity. Fuchigami et al. (1998) indicated that pressure-shift-frozen Chinese cabbage had better firmness, texture, and histological structure than the ordinary frozen samples. 

Fuchigami, M., Hyakuumoto, N., Miyazaki, K., Nomura, T., and Sasaki, J. 1994. Texture and histological structure of carrots frozen at a programmed rate and thawed in an electrostatic field. Journal of Food Science 59(6) 1162-1167. 

It was Robert Hooke in 1665 who discovered the cellular structure of cork, but nearly 200 years elapsed before Robert Brown, a Scottish botanist, discovered the cell nucleus in 1833. The use of the compound microscope dates to around that time and by the end of last century, the histological structure of animal... 

The histological structure of compact bone is more complex than that of cancellous bone, and it is therefore not surprising that compact bone appears only later in the ontogenic order. Compact bone is made of a system of tubes, disposed parallel to the long axis of bone. Each tube (Havers canal) is made of a series of tightly packed concentric lamellae. The lamellae contain lacunae with osteocytes and fine canaliculi containing the filamentous processes derived from the osteocyte. The center of the Havers canal forms a small cavity containing connective tissue and one or two small blood vessels [2]. 

The histological structure of the carotid bodies is very typical. The chemoreceptor cell contains unstable granules that disappear when the nerve endings of the carotid bodies are stimulated. The mechanism by which the chemical stimulus is converted to an electrical impulse is not known. Aortic chemoreceptors are found between the aortic arch and the pulmonary artery on the dorsal aspect of the pulmonary artery. 

In comparison to aspiration biopsy, the punch biopsy (synonymous with core biopsy) technique is performed either with spring-activated cutting needles (Tru-Cut) in combination with a biopsy gun or with manually activated cutting needles. This technique allows for obtaining cores of tissue with an intact histological structure that facilitates a precise histological diagnosis or immunohistochemical analysis. 

All empirical findings have been correlated to the histological structure of the human cortex. The correspondence between the results and the neuro-anatomical substrate gives strong evidence for the reality of these processes. Nevertheless all these findings have to be replicated by independent researchers. 

Murray, J. M. (1931), A study of the histological structure of mouse ovaries following exposure to roentgen irradiation. Am. J. Roentgenol. Radiation Therap. 25, 1-45. 

---