Results 21 to 30 of about 3,564,866 (292)

The Effect of Mirid Density on Volatile-Mediated Foraging Behaviour of Apolygus lucorum and Peristenus spretus

open access: yesInsects, 2021
Plants would release herbivore-induced plant volatiles (HIPVs) to repel herbivores and attract natural enemies after being damaged by herbivores. In this study, after cotton plants were damaged by different densities of Apolygus lucorum, the behavioral ...
Han Chen   +5 more
doaj   +1 more source

On conjectures of Sato-Tate and Bruinier-Kohnen [PDF]

open access: yes, 2013
This article covers three topics. (1) It establishes links between the density of certain subsets of the set of primes and related subsets of the set of natural numbers. (2) It extends previous results on a conjecture of Bruinier and Kohnen in three ways:
Arias-de-Reyna, Sara   +2 more
core   +1 more source

Induction of Resistance Against Plutella xylostella (L.) (Lep.: Plutellidae) by Jasmonic Acid and Mealy Cabbage Aphid Feeding in Brassica napus L.

open access: yesFrontiers in Physiology, 2018
The diamondback moth, Plutella xylostella (L.), has become the most destructive insect pest of cruciferous plants, such as B. napus throughout the world including Iran.
Gadir Nouri-Ganbalani   +3 more
doaj   +1 more source

A natural orbital functional for the many-electron problem [PDF]

open access: yes, 1998
The exchange-correlation energy in Kohn-Sham density functional theory is expressed as a functional of the electronic density and the Kohn-Sham orbitals.
A. D. Becke   +26 more
core   +2 more sources

Reduced population control of an insect pest in managed willow monocultures. [PDF]

open access: yesPLoS ONE, 2009
BACKGROUND: There is a general belief that insect outbreak risk is higher in plant monocultures than in natural and more diverse habitats, although empirical studies investigating this relationship are lacking. In this study, using density data collected
Peter Dalin   +2 more
doaj   +1 more source

Elastocaloric Waste/Natural Rubber Materials with Various Crosslink Densities

open access: yesPolymers, 2023
The characterization of the mechanical behavior of elastocaloric materials is essential to identify their viability in heating/cooling devices. Natural rubber (NR) is a promising elastocaloric (eC) polymer as it requires low external stress to induce a wide temperature span, ΔT.
Candau, Nicolas   +3 more
openaire   +5 more sources

Improved Density Peaks Clustering Based on Natural Neighbor Expanded Group

open access: yesComplexity, 2020
Density peaks clustering (DPC) is an advanced clustering technique due to its multiple advantages of efficiently determining cluster centers, fewer arguments, no iterations, no border noise, etc.
Lin Ding, Weihong Xu, Yuantao Chen
doaj   +1 more source

Cross-Linked Density Determination of Natural Rubber Compounds by Different Analytical Techniques

open access: yesMaterials Research, 2021
This paper investigated the formation of crosslinks in natural rubber compounds in the vulcanization systems: conventional (CV), semi-efficient (SEV), and efficient (EV), processed with three types of accelerators: MBTS (dibenzothiazole disulfide), TMTD (
Carlos Toshiyuki Hiranobe   +7 more
doaj   +1 more source

A generalization of natural density

open access: yesMalaya Journal of Matematik, 2016
The concept of natural density is generalized. It is proved that the new theory is consistent with the existing theory in the literature. Many new results were obtained. A theorem analogous to the Riemann’s theorem on rearrangement of non-absolutely convergent series is proved in the sense of generalized natural density.
null R. Vembu, null A. Bowrna
openaire   +1 more source

NATURAL SELECTION AND DENSITY-DEPENDENT POPULATION GROWTH

open access: yesGenetics, 1983
ABSTRACT Natural selection was studied in the context of density-dependent population growth using a single locus, continuous time model for the rates of change of population size and allele frequency. The maximization principle of density-dependent selection was applied to a class of fitness expressions with explicit recruitment and ...
R A, Desharnais, R F, Costantino
openaire   +2 more sources

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