Tissue & Cell 

About: Tissue & Cell is an academic journal published by Elsevier BV. The journal publishes majorly in the area(s): Biology & Medicine. It has an ISSN identifier of 0040-8166. Over the lifetime, 3915 publications have been published receiving 80741 citations. The journal is also known as: Tissue and cell.

Twisted fibrous arrangements in biological materials and cholesteric mesophases.

Abstract: A comparison is made between certain fibrous and regularly twisted biological materials and certain ordered liquids commonly called 'esteric liquid crystals' Three examples of twisted arrangements (Arthropod cuticle, Ascidian tunica, Dinoflagellate chromosomes) and typical textures of cholesteric mesophases are studied for their optical properties and their defects. These materials are strongly different. Very long polymer chains occur in the organic matrix of skeletal tissues or in chromosomes. On the contrary, in a cholesteric liquid crystal, the molecules are free to move one along the other. However the geometry of such systems is similar. The objections to the twisted model are reviewed and evidence is presented to support a generalized twisted model. A list of the known biological cholesteric analogues is given.

Morphology of connective tissue in skeletal muscle

Abstract: The arrangement and distribution of connective tissue in six different skeletal muscles and smooth muscle was examined by scanning electron microscopy. The endomysial arrangement of collagen was similar in all types of muscle and consisted of three components: (1) myocyte-myocyte connectives; (2) myocyte-capillary connectives; and (3) a weave network of collagen intimately associated with the basal laminae of the myocytes. The perimysium of the different muscles was qualitatively similar but quantitatively dissimilar. The perimysium consisted consisted of large tendon-like bundles of interwoven collagen which connected with the dense weave collagen that surrounded groups of muscles. The arrangement of the collagen in the perimysium and endomysium would explain differences in the mechanical properties of the different muscle. The contribution of the connective tissue to mechanical properties of muscle is discussed.

Localization of angiotensin converting enzyme (kininase II). II. Immunocytochemistry and immunofluorescence

Abstract: The cellular and subcellular sites of angiotensin converting enzyme (kininase II) in lung tissue and endothelial cells in culture were examined by immunocytochemical and immunofluorescence techniques. Converting enzyme is capable of inactivating bradykinin and of converting angiotensin I to its potent lower homolog, angiotensin II. Immunocytochemistry at the electron microscope level used goat anti- (pig lung and angiotensin converting enzyme) coupled to 11-MP (11-microperoxidase) via glutaraldehyde or to 8-MP (8-microperoxidase) via a bifunctional active ester, bis-succinyl succinate. The latter conjugate, which does not contain complex polymers, has been characterized in detail in terms of immunoreactivity and peroxidase activity.