Combinatorial Cell Complexes

2018 ◽  
Author(s):  
Michael Aschbacher
Keyword(s):  
Cell Complexes

scholarly journals Bott characteristics of cell complexes

1983 ◽  
Vol 86 (4) ◽  
pp. 493-499
Author(s):  
Jack Weinstein
Keyword(s):  
Cell Complexes

scholarly journals Cumulus cell acetyl-CoA enrichment from acetate found to decrease with maternal age using a novel approach to measure metabolism in individual cumulus cell complexes

2018 ◽  
Vol 110 (4) ◽  
pp. e107-e108
Author(s):  
S. Anderson ◽  
N. Snyder ◽  
A. Bloom ◽  
D. Brasile ◽  
B. Gocial ◽  
...  
Keyword(s):  
Maternal Age ◽  
Cumulus Cell ◽  
Acetyl Coa ◽  
Cell Complexes ◽  
Novel Approach

Uptake of radioiodine in follicles of dog C-cell complexes studied by autoradiograph and immunoperoxidase staining

1981 ◽  
Vol 200 (4) ◽  
pp. 461-470 ◽  
Author(s):  
Yoko Kameda ◽  
Kazuo Ikeda ◽  
Akira Ikeda
Keyword(s):  
Immunoperoxidase Staining ◽  
Cell Complexes ◽  
C Cell

scholarly journals Frizzled3 controls axonal development in distinct populations of cranial and spinal motor neurons

eLife ◽  
2013 ◽  
Vol 2 ◽  
Author(s):  
Zhong L Hua ◽  
Philip M Smallwood ◽  
Jeremy Nathans
Keyword(s):  
Cell Death ◽  
Motor Neurons ◽  
Planar Cell Polarity ◽  
Motor Nerve ◽  
Normal Wave ◽  
Axon Growth ◽  
Axonal Growth ◽  
Cell Complexes ◽  
Developing Neurons

Disruption of the Frizzled3 (Fz3) gene leads to defects in axonal growth in the VIIth and XIIth cranial motor nerves, the phrenic nerve, and the dorsal motor nerve in fore- and hindlimbs. In Fz3−/− limbs, dorsal axons stall at a precise location in the nerve plexus, and, in contrast to the phenotypes of several other axon path-finding mutants, Fz3−/− dorsal axons do not reroute to other trajectories. Affected motor neurons undergo cell death 2 days prior to the normal wave of developmental cell death that coincides with innervation of muscle targets, providing in vivo evidence for the idea that developing neurons with long-range axons are programmed to die unless their axons arrive at intermediate targets on schedule. These experiments implicate planar cell polarity (PCP) signaling in motor axon growth and they highlight the question of how PCP proteins, which form cell–cell complexes in epithelia, function in the dynamic context of axonal growth.

Validation of macroscopic maturity stages of the Patagonian red octopus Enteroctopus megalocyathus

2012 ◽  
Vol 93 (3) ◽  
pp. 833-842 ◽  
Author(s):  
Nicolas Ortiz
Keyword(s):  
Sexual Maturation ◽  
Reproductive System ◽  
Seminiferous Tubule ◽  
Atlantic Coast ◽  
Microscopic Level ◽  
Maturity Index ◽  
Follicular Cell ◽  
Seminiferous Tubules ◽  
Cell Complexes ◽  
Maturation Stages

Testes and ovaries of Enteroctopus megalocyathus collected along the Patagonian Atlantic coast were analysed histologically to validate the macroscopic maturity scales adopted for this species. Changes through the course of development of the seminiferous tubules and of the oocyte/follicular cell complexes were characterized and these were classified into five and six microscopic categories of development respectively. A histological maturity index, based on the frequencies of microscopic categories, was used to assess the correspondence between macroscopic maturation stages and the microscopic level of development of the gonadal tissue. Seminiferous tubules showed a regular and progressive pattern of microscopic development within each macroscopic stage and between consecutive macroscopic stages. However, a minority of males exhibiting seminiferous tubule with sperm did not display macroscopic characteristics of the mature-spawning stage. In females, an overlapping of microscopic categories was observed in maturing macroscopic stages. Previtellogenic oocytes were not present at mature-spawning or spent stages. Significant changes in the histological maturity index were observed between consecutive macroscopic stages, confirming the validity of macroscopic maturity scales of both sexes. In addition, by considering both macroscopic and microscopic criteria, it was possible to determine the overall state of development and functioning of the reproductive system during sexual maturation of this species.

A topological coordinate system for the diamond cubic grid

2016 ◽  
Vol 72 (5) ◽  
pp. 570-581 ◽  
Author(s):  
Lidija Čomić ◽  
Benedek Nagy
Keyword(s):  
Coordinate System ◽  
Shape Analysis ◽  
Coordinate Systems ◽  
Cell Complexes ◽  
Dependent Coordinates

Topological coordinate systems are used to address all cells of abstract cell complexes. In this paper, a topological coordinate system for cells in the diamond cubic grid is presented and some of its properties are detailed. Four dependent coordinates are used to address the voxels (triakis truncated tetrahedra), their faces (hexagons and triangles), their edges and the points at their corners. Boundary and co-boundary relations, as well as adjacency relations between the cells, can easily be captured by the coordinate values. Thus, this coordinate system is apt for implementation in various applications, such as visualizations, morphological and topological operations and shape analysis.

A framework for system specification using chains on cell complexes

2000 ◽  
Vol 32 (7) ◽  
pp. 447-459 ◽  
Author(s):  
R Egli ◽  
N.F Stewart
Keyword(s):  
System Specification ◽  
Cell Complexes

Spatial and temporal patterns of wound periderm development in Cryptomeria japonica bark

IAWA Journal ◽  
2021 ◽  
pp. 1-11
Author(s):  
Etsushi Iizuka ◽  
Megumi Ohse ◽  
Izumi Arakawa ◽  
Peter Kitin ◽  
Ryo Funada ◽  
...  
Keyword(s):  
Cryptomeria Japonica ◽  
Structural Changes ◽  
Time Frame ◽  
Developmental Time ◽  
Growth Responses ◽  
Spatial And Temporal Patterns ◽  
Cell Complexes ◽  
Tree Defenses ◽  
Wound Responses ◽  
Periderm Formation

Abstract Limited investigations have been carried out on the physiological and growth responses of bark to wounding, even though wound periderms play crucial roles in tree defenses. To understand the mechanisms of wound periderm formation, we studied the growth responses and structural changes of wounded bark of three Cryptomeria japonica individuals. We observed the developmental time frame and morphology of wound periderms around mechanically induced wounds in summer. The wound responses included discoloration, lignification, and suberization in tissues present at the time of wounding, followed by wound periderm formation and secondary metabolite deposition. The trees had developed wound periderms approximately 4 weeks after wounding. The wound periderms were within 3 mm in the axial directions and within 1 mm in the lateral directions from the wound surfaces. The distinct patterns of wound periderm formation in the axial and lateral regions resulted from the arrangement and anatomical features of the cells adjacent to the wounds. The wound phellem cells were tangentially narrower and axially shorter in the side and upper/lower regions, respectively, of the wounds. Therefore, the cell division frequencies in the planes parallel to the wound surface may be greater than those in the other directions. Wound reactions in bark might initially be triggered by microenvironmental changes, such as the spread of desiccation, which depends directly on the morphology of phloem cell complexes.

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