Results 101 to 110 of about 64,372 (201)
Colloids and Surfaces B: BiointerfacesThe petal effect is identified as a non-wetting state with high drop adhesion. The wetting behavior of petal surfaces is attributed to the papillose structure of their epidermis, which leads to a Cassie-Baxter regime combined with strong pinning sites. Under this scenario, sessile drops are pearl shaped and, unlike lotus-like surfaces, firmly attached ...
Sergio Parra-Vicente +5 more
openaire +3 more sources
Origin and evolution of petals in angiosperms
Plant Ecology and Evolution, 2013 Background and aims – The term ‘petal’ is loosely applied to a variety of showy non-homologous structures, generally situated in the second whorl of a differentiated perianth. Petaloid organs are extremely diverse throughout angiosperms with repeated derivations of petals, either by differentiation of a perianth, or derived from staminodes.
Ronse De Craene, Louis +1 more
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Towards a semilocal study of parabolic invariant curves for fibred holomorphic maps [PDF]
arXiv, 2010 We introduce the study of the local dynamics around a parabolic indifferent invariant curve for fibred holomorphic maps. As in the classical non-fibred case, we show that petals are the main ingredient. Nevertheless, one expects the properties of the base rotation number should play an important role in the arrangement of the petals.
arxiv
A Reidemeister type theorem for petal diagrams of knots [PDF]
arXiv, 2018 We study petal diagrams of knots, which provide a method of describing knots in terms of permutations in a symmetric group $S_{2n+1}$. We define two classes of moves on such permutations, called trivial petal additions and crossing exchanges, which do not change the isotopy class of the underlying knot.
arxiv
BMC Genomics, 2019 Background Brassica oleracea exhibits extensive phenotypic diversity. As an important trait, petal color varies among different B. oleracea cultivars, enabling the study of the genetic basis of this trait.
Fengqing Han +11 more
doaj +1 more source
Materials & Design, 2022 Recently, bioinspired mushroom or reentrant mushroom microstructures have attracted intersts of researchers for their amazing water superrepellence property. However, basic principles of exquisite microstructures design for improving water repellence are
Yang Liu +4 more
doaj
Bio-inspired surface coil for small-bore MRI at 15.2 T [PDF]
arXiv, 2017 We looked for a biological analogy to developed an improved surface coil to acquire magnetic resonance images. Nature offers engineering solutions that can be exploited to improve the performance of devices, such as MRI RF coils. In this paper, we proposed a coil layout based on flower petal patterns for UHF MRI at 15.2 T. This particular configuration
arxiv
Sunflowers and $L$-intersecting families [PDF]
arXiv, 2016 Let $f(k,r,s)$ stand for the least number so that if $\cal F$ is an arbitrary $k$-uniform, $L$-intersecting set system, where $|L|=s$, and $\cal F$ has more than $f(k,r,s)$ elements, then $\cal F$ contains a sunflower with $r$ petals. We give an upper bound for $f(k,3,s)$.
arxiv
Development of the PETAL Laser Facility and its Diagnostic Tools [PDF]
, 2017 The PETAL system (PETawatt Aquitaine Laser) is a high-energy short-pulse laser, currently in an advanced construction phase, to be combined with the French Mega-Joule Laser (LMJ).
Batani , Dimitri +4 more
core
Bulletin of the Iraq Natural History MuseumMicromorphological characters of petals in 8 genera representing 12 taxa of Bignoniaceae from Egypt were carried out using scanning electron microscopy (SEM) to evaluate their taxonomic importance in petal epidermal micromorphology ...
Samir S. Teleb +3 more
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