Results 31 to 40 of about 79,773 (196)

Echinoderms have bilateral tendencies. [PDF]

PLoS ONE, 2012
Echinoderms take many forms of symmetry. Pentameral symmetry is the major form and the other forms are derived from it. However, the ancestors of echinoderms, which originated from Cambrian period, were believed to be bilaterians.
Chengcheng Ji, Liang Wu, Wenchan Zhao, Sishuo Wang, Sishuo Wang, Jianhao Lv   +5 more
doaj   +1 more source

Tree Size Influences Leaf Shape but Does Not Affect the Proportional Relationship Between Leaf Area and the Product of Length and Width

Frontiers in Plant Science, 2022
The Montgomery equation predicts leaf area as the product of leaf length and width multiplied by a correction factor. It has been demonstrated to apply to a variety of leaf shapes.
Jianzhong Ma, Jianzhong Ma, Karl J. Niklas, Leyi Liu, Zhendong Fang, Yirong Li, Peijian Shi   +6 more
doaj   +1 more source

Evaluation of roots and root canals’ morphology of maxillary premolars in a Syrian subpopulation using cone-beam computed tomography

Saudi Endodontic Journal, 2023
Introduction: The morphology of the roots is variable and complex; hence, a better understanding of the root canal systems is important to provide optimal endodontic treatment. The aim of this study was to investigate the number of roots, and root canals’
Safa Allawi, Ahmad A Madarati, Mouhammad Al-Tayyan   +2 more
doaj   +1 more source

Collective rationality and monotone path division rules [PDF]

, 2014
We impose the axiom Independence of Irrelevant Alternatives on division rules for the conflicting claims problem. With the addition of Consistency and Resource Monotonicity, this characterizes a family of rules which can be described in three different ...
Stovall, John E.
core   +3 more sources

Bilateral Symmetry in Morphogenesis of Embryos [PDF]

Proceedings of the National Academy of Sciences, 1970
It is suggested that differentiated embryonic cells have a high specificity of molecular constitution as regards the surface layers surrounding their cellular membranes. Correspondingly, specific interface energies may characterize the early contacts between different cell types.
openaire   +2 more sources

Shape and position of the node and notochord along the bilateral plane of symmetry are regulated by cell–extracellular matrix interactions

Biology Open, 2014
The node and notochord (and their equivalents in other species) are essential signaling centers, positioned along the plane of bilateral symmetry in developing vertebrate embryos. However, genes and mechanisms regulating morphogenesis of these structures
Maria Pulina, Dong Liang, Sophie Astrof
doaj   +1 more source

Optimizing neuromuscular symmetry through load-progressive closed-chain upper limb training: An EMG-based approach

JSAMS Plus
Background: Bilateral neuromuscular symmetry is a critical factor for safe and effective resistance training. Limited evidence exists on how progressive closed-chain resistance exercises influence upper-limb muscle activation and interlimb balance ...
Rafid Qaduri, Taha Jasim, Hiba Hamadi, Safaa Ismaeel, Shaimaa Shihab, Mohammed Al-Jahni   +5 more
doaj   +1 more source

Bilateral index, power, force, and velocity during bench press with different loads in male handball players

Frontiers in Physiology, 2023
Bilateral index for upper limbs was determined for maximal force, speed and power in 18 male handball players. Variables were individually assessed with a functional electromechanical dynamometer during unilateral and bilateral bench press push-off for ...
Andrés González-Ramírez, Carol Torres, Carlos Magallanes, Carlos Gabriel Fábrica   +3 more
doaj   +1 more source

Non-equilibrium dynamics and floral trait interactions shape extant angiosperm diversity. [PDF]

, 2016
Why are some traits and trait combinations exceptionally common across the tree of life, whereas others are vanishingly rare? The distribution of trait diversity across a clade at any time depends on the ancestral state of the clade, the rate at which ...
Armbruster, W Scott, Diggle, Pamela K, Fenster, Charles B, Harder, Lawrence D, Hardy, Christopher R, Hileman, Lena C, Hufford, Larry, Litt, Amy, Magallón, Susana, O'Meara, Brian C, Smith, Stacey D, Smith, Stephen A, Stevens, Peter F   +12 more
core   +2 more sources

Bilateral symmetry breaking in a nonlinear Fabry-Perot cavity exhibiting optical tristability

, 1999
We show the existence of a region in the parameter space that defines the field dynamics in a Fabry-Perot cylindrical cavity, where three output stable stationary states of the light are possible for a given localized incident field.
F. S. Felber, G. P. Agrawal, H. Haus, H. M. Gibbs, I. H. Deutsch, J. Boyce, J. H. Marburger, Jack Boyce, Juan P. Torres, L. A. Lugiato, M. Haelterman, M. Haelterman, M. Haelterman, N. N. Akhmediev, P. Milonni, P. W. Anderson, Raymond Y. Chiao, S. Coleman, T. D. Lee, W. H. Press, W. J. Firth, W. J. Firth, Y. I. Balkarei   +22 more
core   +1 more source