321 research outputs found
Correction: Directional-dependent pockets drive columnar-columnar coexistence (Soft matter (2020) 16 29 (6720-6724))
No full textThe authors regret the incorrect affiliation for two of the authors, Remco Tuinier and Gijsbertus de With. The corrected list of affiliations is as shown here. The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers
Thrips hawaiiensis Morgan
No full textThrips hawaiiensis (Morgan) Although this is a common pantropical flower thrips, it has been reported rarely from Africa (Mound 2010). In high numbers the species can cause damage to fruits of banana and citrus (Chiu et al. 1991; Tsai et al. 1992). A single female was intercepted from Ethiopia, at the flower auction in Rijnsburg, 4.ii. 2005, on Rosa— cut flower (J. G. de Zeeuw).Published as part of Vierbergen, Gijsbertus, 2014, Thysanoptera intercepted in the Netherlands on plant products from Ethiopia, with description of two new species of the genus Thrips, pp. 269-278 in Zootaxa 3765 (3) on page 275, DOI: 10.11646/zootaxa.3765.3.3, http://zenodo.org/record/22582
Thrips microchaetus Karny
No full textThrips microchaetus Karny This species is widespread in Africa, where it occurs in many kinds of flowers. Its geographical distribution is mostly Saharan and reaches from Morocco to Arabia, with a southern extension into Kenya (Zur Strassen & Van Harten 2006). The species has many characters in common with the Afrotropical Thrips tenellus Trybom (Mound 2010). From Ethiopia one male was found in an import firm at Sassenheim, 15.iv. 2005, on Rosa cut flower (J.G. de Zeeuw), and one female in import firm at Noordwijk, 11.v. 2005, on Dianthus cut flower (J.G. de Zeeuw). In 2010 in Japan an interception of a single female was done from Ethiopia on the same host (Masumoto et al. 2012 a)Published as part of Vierbergen, Gijsbertus, 2014, Thysanoptera intercepted in the Netherlands on plant products from Ethiopia, with description of two new species of the genus Thrips, pp. 269-278 in Zootaxa 3765 (3) on page 275, DOI: 10.11646/zootaxa.3765.3.3, http://zenodo.org/record/22582
Thrips scotti Moulton
No full textThrips scotti (Moulton) This species is known only from the original description and a re-description (Mound 2010). It was described from seven females, sampled on the same day and at the same location as Thrips cf. abyssinae (Moulton, 1928). On 11.v. 2005 J. G. de Zeeuw found a single female of this species in a consignment of Dianthus cut flower from Ethiopia in an import nursery at Noordwijk. The following illustrations (Figs 17–22) are of this specimen that has been compared with the re-description by Mound (2010).Published as part of Vierbergen, Gijsbertus, 2014, Thysanoptera intercepted in the Netherlands on plant products from Ethiopia, with description of two new species of the genus Thrips, pp. 269-278 in Zootaxa 3765 (3) on page 275, DOI: 10.11646/zootaxa.3765.3.3, http://zenodo.org/record/22582
Assembly Control at a Low Péclet Number in Ultracentrifugation for Uniformly Sized Nanoparticles
No full textThe intrinsic high diffusion rate of colloids at low Péclet number results in an extremely fast crystallization process and instant formation of colloidal crystals, even at an ultracentrifugal field of extremely high intensity. By introducing a small number of clusters in sedimention, it should be possible to slow down the crystallization process, thus making the assembly order tunable in preparative ultracentrifugation experiments. Here, we used sodium dodecyl sulfate-stabilized polystyrene nanoparticles (with a size dispersity of 1.07) dispersed in a solution of high ionic strength. Sedimentation and assembly of these nanoparticles were done using preparative ultracentrifugation at various angular velocities. The sedimentation process was also analyzed in situ by analytical ultracentrifugation in real time. By creating as low as 3% of clusters into these nearly uniformly sized polystyrene nanoparticle dispersions during the sedimentation process, the superstructure order becomes easily tunable between glassy and crystalline. Theoretical calculations complemented the experiments to explain the mechanism of cluster formation in sedimentation. This work provides a novel methodology to produce superstructures with a tunable packing order for colloids at low Péclet number
Melting Is Well-Known, but Is It Also Well-Understood?
No full textContrary to continuous phase transitions, where renormalization group theory provides a general framework, for discontinuous phase transitions such a framework seems to be absent. Although the thermodynamics of the latter type of transitions is well-known and requires input from two phases, for melting a variety of one-phase theories and models based on solids has been proposed, as a generally accepted theory for liquids is (yet) missing. Each theory or model deals with a specific mechanism using typically one of the various defects (vacancies, interstitials, dislocations, interstitialcies) present in solids. Furthermore, recognizing that surfaces are often present, one distinguishes between mechanical or bulk melting and thermodynamic or surface-mediated melting. After providing the necessary preliminaries, we discuss both types of melting in relation to the various defects. Thereafter we deal with the effect of pressure on the melting process, followed by a discussion along the line of type of materials. Subsequently, some other aspects and approaches are dealt with. An attempt to put melting in perspective concludes this review.</p
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