898 research outputs found
sj-docx-1-cms-10.1177_12034754231223451 – Supplemental material for Hidradenitis Suppurativa Patient Referrals to a Canadian Community Dermatology Practice: A Retrospective Chart Review
No full textSupplemental material, sj-docx-1-cms-10.1177_12034754231223451 for Hidradenitis Suppurativa Patient Referrals to a Canadian Community Dermatology Practice: A Retrospective Chart Review by Leah A. Johnston and Susan M. Poelman in Journal of Cutaneous Medicine and Surgery</p
Photocatalytic removal of ethanol and acetaldehyde by N-promoted TiO2 films: the role of the different nitrogen sources
No full textPure and N-doped TiO2 nanoparticles are obtained by a combination of wet and thermal procedures, starting from TiCl3 and alkoxide precursors; the N-source is both inorganic (NH3) and organic (triethylamine). Samples are characterized for their bulk, surface, optical and magnetic properties. Ab initio calculations of the electronic properties of the doped samples are performed. Sample thin films are tested for their photocatalytic activity, under UV and simulated solar irradiation, with respect to air pollutants ethanol and acetaldehyde. Both the disappearance of the molecule itself and the complete mineralization (CO2) are followed during the reaction time. FTIR/ATR analyses are performed on samples withdrawn during the course of the reaction to identify reaction intermediates. In the case of acetaldehyde, photocatalytic tests are also performed under visible light (λ > 400 nm). The photoactivity sequences of the N-doped samples under the different irradiation sources are discussed with reference to their surface/bulk properties, light absorption features, nature and amount of paramagnetic species
Microbial symbionts of parasitoids
No full textParasitoids depend on other insects for the development of their offspring. Their eggs are laid in or on a host insect that is consumed during juvenile development. Parasitoids harbor a diversity of microbial symbionts including viruses, bacteria, and fungi. In contrast to symbionts of herbivorous and hematophagous insects, parasitoid symbionts do not provide nutrients. Instead, they are involved in parasitoid reproduction, suppression of host immune responses, and manipulation of the behavior of herbivorous hosts. Moreover, recent research has shown that parasitoid symbionts such as polydnaviruses may also influence plant-mediated interactions among members of plant-associated communities at different trophic levels, such as herbivores, parasitoids, and hyperparasitoids. This implies that these symbionts have a much more extended phenotype than previously thought. This review focuses on the effects of parasitoid symbionts on direct and indirect species interactions and the consequences for community ecology
Travel report Mauritania bivalve Molluscs october 2008
No full textDuring the last four years Mauritania has been working on the completion of a Food Safety Program of Bivalve Mollusks, in order to obtain an export approval by the Europe Union. During the preparations for an inspection by the FVO (Food and Veterinary Office) no fisheries or production activities for Bivalve Mollusks occurred in Mauritania. The aim of the mission was to perform a pre-assessment on the status of the Bivalve Food Safety program in Mauritania. The pre-inspection was carried out in order to prepare Mauritania for the upcoming Food and Veterinary Office (FVO) inspection, planned for the second semester of 2008 or the beginning of 2009
Hyperparasitoids exploit herbivore-induced plant volatiles during host location to assess host quality and non-host identity
No full textAlthough consumers often rely on chemical information to optimize their foraging strategies, it is poorly understood how top carnivores above the third trophic level find resources in heterogeneous environments. Hyperparasitoids are a common group of organisms in the fourth trophic level that lay their eggs in or on the body of other parasitoid hosts. Such top carnivores use herbivore-induced plant volatiles (HIPVs) to find caterpillars containing parasitoid host larvae. Hyperparasitoids forage in complex environments where hosts of different quality may be present alongside non-host parasitoid species, each of which can develop in multiple herbivore species. Because both the identity of the herbivore species and its parasitization status can affect the composition of HIPV emission, hyperparasitoids encounter considerable variation in HIPVs during host location. Here, we combined laboratory and field experiments to investigate the role of HIPVs in host selection of hyperparasitoids that search for hosts in a multi-parasitoid multi-herbivore context. In a wild Brassica oleracea-based food web, the hyperparasitoid Lysibia nana preferred HIPVs emitted in response to caterpillars parasitized by the gregarious host Cotesia glomerata over the non-host Hyposoter ebeninus. However, no plant-mediated discrimination occurred between the solitary host C. rubecula and the non-host H. ebeninus. Under both laboratory and field conditions, hyperparasitoid responses were not affected by the herbivore species (Pieris brassicae or P. rapae) in which the three primary parasitoid species developed. Our study shows that HIPVs are an important source of information within multitrophic interaction networks allowing hyperparasitoids to find their preferred hosts in heterogeneous environments
Flow patterns around longitudinal training dams
No full textWith the intention to reduce the negative effects of ongoing bed erosion, as well as to improve several other river functions such as protection against floods, provision of safe and efficient navigation and ecology, a ‘pilot project longitudinal training dams’ was initiated. The training dams have recently been implemented in the Waal between Tiel and Sind Andries. In this project, river groynes have been completely removed and replaced by dams that lie parallel to the river bank. With help of the longitudinal training dams, a two-channel river system is created in which the river is divided into a main and side channel. The dams are placed in a continuous manner with openings in between that are relatively small compared to the dam length. At the beginning and end of the dam an inlet and outlet region is situated, as shown in Fig. 1. The combination of inlet and openings allows for water and sediment to be divided between the main and the side channel. Both inlet and openings are constructed with the help of a porous rock-layer. The crest heights can be altered by adding or removing stones. This is expected to influence the amount of water and sediment entering the side channel and can therefore be used as a regulation tool. A.J.F. Hoitink, T.V. de Ruijsscher, T.J. Geertsema, B. Makaske, J. Wallinga, J.H.J. Candel, J. Poelman (Eds.) NCR days 2017, Febr. 1-3, 2017. Book of abstracts, NCR publication 41-2017.Rivers, Ports, Waterways and Dredging EngineeringHydraulic Structures and Flood RiskEnvironmental Fluid Mechanic
J. J. von Allmen - R. Aubert - N. Egender - B. Fischer - É. Fouilloux - R. Greenacre - A. Haquin - E. Lanne - R. Ladous - M. Van Parys - R. Poelman - J. Card. Willebrands, Veilleur avant l'Aurore. Colloque Lambert Beauduin. 1978
No full textThils Gustave. J. J. von Allmen - R. Aubert - N. Egender - B. Fischer - É. Fouilloux - R. Greenacre - A. Haquin - E. Lanne - R. Ladous - M. Van Parys - R. Poelman - J. Card. Willebrands, Veilleur avant l'Aurore. Colloque Lambert Beauduin. 1978. In: Revue théologique de Louvain, 9ᵉ année, fasc. 3, 1978. pp. 375-376
Effect of the pulse current on the microstructure and corrosion properties of hard chromium deposits obtained using trivalent chromium baths
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