Analysis of Distant‐Neighbor Interactions in Cubic Spinels

1968 ◽  
Vol 39 (2) ◽  
pp. 660-661 ◽  
Author(s):  
K. Dwight ◽  
N. Menyuk
Keyword(s):  
Distant Neighbor

scholarly journals The effect of pollen source on seed traits and dispersability in the heterocarpic annual Crepis sancta

2020 ◽  
Author(s):  
Efrat Dener ◽  
Hagai Shemesh ◽  
Itamar Giladi
Keyword(s):  
Reproductive Success ◽  
Reproductive Output ◽  
Seed Traits ◽  
Dispersal Strategy ◽  
Physiological Constraints ◽  
Dispersal Traits ◽  
Distant Neighbor ◽  
The Common ◽  
Nonsignificant Effect ◽  
Crepis Sancta

Abstract Aims The evolution and expression of dispersal-related traits are intertwined with those of other life-history functions and are manifested within various physiological constraints. Such a relationship is predicted between inbreeding levels and dispersability, which may be anatomically and ontogenetically linked so that the selection pressures on one may affect the other. While both the effect of inbreeding on reproductive success and on dispersal strategies received much attention, only a few studies considered both simultaneously. Furthermore, such studies often rely on two dichotomic representations of breeding and dispersal: using selfing vs. outcrossing as a representation of breeding level, and dispersal ratio as the sole representation of dispersal strategy. Methods Here we used pollination experiments in the heterocarpic Crepis sancta (Asteraceae) to expand in two different manners on the common practice of using dichotomic representations of breeding and dispersal. First, we used pollination treatments that represent a continuum from selfing through pollination by kin to pollination by a distant neighbor. Second, we measured a whole set of continuous morphological and dispersal-related traits, in addition to measurements of reproductive success and dispersal ratio. Important findings The proportion of developed capitula and the number of both dispersed and non-dispersed achenes were significantly lower in the self-pollination treatment in comparison to the out-crossed treatments. The effect of pollen sources on dispersal ratio was not statistically significant, though self-pollinated plants rarely produced non-dispersing seeds. Achene’s biomass increased with distance between parent plants, but pappus width did not, leading to a nonsignificant effect of pollination on falling velocity. Overall, pollen source affected mainly traits that were associated with reproductive output, but it had no clear effect on predominately dispersal-related traits. Such differences in the response of reproduction and dispersal traits to variation in pollen source suggest that dispersal-related selection is probably weak and/or masked by other forces.

New Tight-Binding Pair Potentials for Mineral Oxides: Application to β-Cassiterite (110), β-Tridymite (10TO) and Cristobalite (110)

1992 ◽  
Vol 278 ◽  
Author(s):  
T. J. Godin ◽  
John P. Lafemina
Keyword(s):  
Total Energy ◽  
Nearest Neighbor ◽  
Tight Binding ◽  
Insulating Materials ◽  
Atomic Structures ◽  
Pair Potentials ◽  
Mineral Oxides ◽  
Distant Neighbor

AbstractTight-binding, total-energy (TBTE) methods have successfully predicted surface atomic geometries for a variety of semiconducting and insulating materials that are well described by a nearest-neighbor model of interatomic interactions. However, little work has been done on distant-neighbor models, which are required to study many important mineral oxides. In this paper we demonstrate one way in which the TBTE methodology can be extended to these materials. To illustrate this approach, we calculate surface atomic structures for cassiterite SnO2 (110), β-cristobalite SiO2 (110) and βtridymite SiO2 (10TO).

scholarly journals Distant Neighbor Base Sequence Context Effects in Human Nucleotide Excision Repair of a Benzo[a]pyrene-derived DNA Lesion

2010 ◽  
Vol 399 (3) ◽  
pp. 397-409 ◽  
Author(s):  
Yuqin Cai ◽  
Konstantin Kropachev ◽  
Rong Xu ◽  
Yijin Tang ◽  
Marina Kolbanovskii ◽  
...  
Keyword(s):  
Nucleotide Excision Repair ◽  
Context Effects ◽  
Excision Repair ◽  
Base Sequence ◽  
Sequence Context ◽  
Dna Lesion ◽  
Nucleotide Excision ◽  
Distant Neighbor

Magnetization steps due to pairs of distant-neighbor spins in Zn1-xCoxSe and Zn1-xCoxS

1990 ◽  
Vol 75 (3) ◽  
pp. 201-204 ◽  
Author(s):  
Y. Shapira ◽  
T.Q. Yu ◽  
B.K. Lau ◽  
S. Foner ◽  
E.J. McNiff ◽  
...  
Keyword(s):  
Distant Neighbor

Distant-neighbor exchange constants from magnetization steps inZn1−xCoxTe

1992 ◽  
Vol 46 (18) ◽  
pp. 11617-11625 ◽  
Author(s):  
T. Q. Vu ◽  
V. Bindilatti ◽  
Y. Shapira ◽  
E. J. McNiff ◽  
C. C. Agosta ◽  
...  
Keyword(s):  
Exchange Constants ◽  
Distant Neighbor

Distant-neighbor exchange constants in Mn-based dilute magnetic semiconductors

1999 ◽  
Vol 85 (8) ◽  
pp. 5950-5952 ◽  
Author(s):  
V. Bindilatti ◽  
E. ter Haar ◽  
N. F. Oliveira ◽  
Y. Shapira ◽  
M. T. Liu
Keyword(s):  
Magnetic Semiconductors ◽  
Dilute Magnetic Semiconductors ◽  
Exchange Constants ◽  
Distant Neighbor
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