4,633 research outputs found
Plicatotheca anitae Calder & Vervoort 1986
No full text<i>Plicatotheca anitae</i> Calder & Vervoort, 1986 <p>Fig. 2c, d</p> <p> <i>Plicatotheca anitae</i> Calder & Vervoort, 1986: 2022, figs. 1–4.</p> <p> <b>Type locality.</b> Bermuda: 2 km southeast of Castle Roads, 60–90 m (Calder & Vervoort 1986).</p> <p> <b>Voucher material.</b> Off Sebastian Inlet, 27°52.5’N, 79°57.5’W, 75–98 m, 28.ii.1974, Smith-McIntyre grab, R/ V <i>Gosnold</i> Station 222/274D, six colony fragments, up to 1.5 cm high, with two gonothecae, ROMIZ B1072.</p> <p> <b>Remarks</b>. <i>Plicatotheca anitae</i> Calder & Vervoort, 1986 appears to be widely distributed, having been reported from the Pacific and Indian oceans as well as the western and eastern Atlantic. Although Bermuda is the type locality of the species, this is only the second record of it in the western Atlantic. It is a species of deeper waters, having a reported bathymetric distribution of 60–1480 m (Vervoort 2006). Specimens examined here were collected at the upper end of this range, on the outer edge of the continental shelf off the east coast of Florida.</p> <p> Gonothecae of <i>Plicatotheca anitae</i> are reported here for the second time. They correspond with the description of Gili <i>et al</i>. (1989), based on material from Guinea Bissau, western Africa, in being laterally flattened and triangular in shape. As with the specimens of Gili <i>et al</i>., gonothecae observed here were empty and the nature of the gonophore could not be determined.</p> <p> <i>Plicatotheca anitae</i> resembles <i>Campanulina denticulata</i> Clarke, 1907, originally described from abyssal depths (2845 fathoms = 5203 m) off Peru. In addition to trophosomal differences between the two noted earlier (Calder 1991a), the gonotheca of <i>P. anitae</i> is now known to be triangular rather than long and irregularly cylindrical as in <i>C. denticulata</i>. <i>Campanulina indivisa</i> Fraser, 1948 from 267–347 fathoms (488–634 m) off Catalina Island, California, regarded as conspecific with <i>C. denticulata</i> by Vervoort (1966), was referred to <i>Plicatotheca</i> Calder & Vervoort, 1986 by Calder <i>et al</i>. (2009). That generic assignment is doubtful if gonothecae of <i>C. indivisa</i>, presently unknown, prove identical with those of <i>C. denticulata</i>.</p> <p> <b>Reported distribution.</b> Atlantic coast of Florida. First record.</p> <p>Western Atlantic. Bermuda (Calder 1991a) to Florida (this study).</p> <p>Elsewhere. Atlantic and Indo-Pacific regions, from deeper neritic to bathyal depths (Vervoort 2006).</p>Published as part of <i>Calder, Dale R., 2013, Some shallow-water hydroids (Cnidaria: Hydrozoa) from the central east coast of Florida, USA, pp. 1-72 in Zootaxa 3648 (1)</i> on pages 14-15, DOI: 10.11646/zootaxa.3648.1.1, <a href="http://zenodo.org/record/5264362">http://zenodo.org/record/5264362</a>
CALDER: Cryogenic light detectors for background-free searches
No full textCALDER is a R&D project for the development of cryogenic light detectors with an active surface of 5x5cm2 and an energy resolution of 20 eV RMS for visible and UV photons. These devices can enhance the sensitivity of next generation large mass bolometric detectors for rare event searches, providing an active background rejection method based on particle discrimination. A CALDER detector is composed by a large area Si absorber substrate with superconducting kinetic inductance detectors (KIDs) deposited on it. The substrate converts the incoming light into athermal phonons, that are then sensed by the KIDs. KID technology combine fabrication simplicity with natural attitude to frequency-domain multiplexing, making it an ideal candidate for a large scale bolometric experiments. We will give an overview of the CALDER project and show the performances obtained with prototype detectors both in terms of energy resolution and efficiency
Nutritional benefits of omega-3 fatty acids
No full textNutritional benefits of omega-3 fatty acidsP.C. Calder, University of Southampton, UK- Introduction- Dietary sources and typical intakes of omega-3 fatty acids- Marine omega-3 fatty acids- Health effects of a-linolenic acid- Future trends- Conclusion- Sources of further information and advice- References - Appendix: abbreviation
Increasing transparency in the British Journal of Nutrition
No full textKeen readers of the BJN will have noticed the recent appearance of ‘conflict of interest’ statements and of more complete descriptions of the contribution of each author to the publication. I have introduced these innovations in order to increase the transparency of the articles that we publish in the BJN; further strategies to increase accuracy, transparency and accountability of papers published in the journal will follow in order to encourage a climate of intellectual honesty and to decrease the risk of misconduct. In particular, the journal will follow as closely as possible the recommendations and guidelines of the Committee on Publishing Ethics (COPE)(1) and of the International Committee of Medical Journal Editors (ICMJE)(2). COPE and ICMJE have made available a range of guidelines aimed at establishing best practice in scientific publishing. These include guidelines for authors and for the conduct of reviewers, editorial boards and editors. Many of the guidelines are already followed by the BJN, but others are not yet fully in place
Nutrition and immunity : lessons for COVID-19
No full textThe role of the immune system is to protect the individual against pathogenic organisms. Nutrition is one of multiple factors that determines the immune response and good nutrition is important in supporting the immune response. Immunity can be impaired in older people, particularly those who are frail, in those living with obesity, in those who are malnourished and in those with low intakes of micronutrients. The immune impairments associated with nutritional inadequacy increase susceptibility to infection and permit infections to become more severe, even fatal. The adverse impact of poor nutrition on the immune system, including its inflammatory component, may be one of the explanations for the higher risk of more severe outcomes from infection with SARS-CoV-2 seen in older people and in those living with obesity. Studies of individual micronutrients including vitamin D and zinc suggest roles in reducing severity of infection with SARS-CoV-2. Good nutrition is also important in promoting a diverse gut microbiota, which in turn supports the immune system. The importance of nutrition in supporting the immune response also applies to assuring robust responses to vaccination. There are many lessons from the study of nutrition and immunity that are relevant for the battlewith SARS-CoV-2.<br/
Nutrition et fonction immunitaire (Nutrition and immune function)
No full textUn déficit énergétique majeur ainsi que celui en un ou plusieurs nutriments tels vitamines A, B6, B12, C, E, acide folique, zinc, cuivre, fer, sélénium, acides aminés essentiels et acides gras essentiels, peut altérer la fonction immunitaire et augmenter la sensibilité aux infections. Cela est lié à l'implication des nutriments dans les réponses moléculaires et cellulaires du système immunitaire. La correction de ces déficits restaure la fonction immunitaire et améliore la résistance aux infections. Ainsi, une nutrition appropriée est nécessaire pour maintenir chez l'hôte des défenses immunes dirigées contre les bactéries, les virus, les champignons, les parasites, les cellules tumorales. Bien que, chez le sujet sain, les quantités de certains nutriments requises pour l'amélioration des fonctions immunes soient plus importantes que les apports recommandés, les excès de ces nutriments peuvent également altérer les fonctions immunitaires. Quelques nutriments (par exemple la glutamine et l'arginine) peuvent devenir limitant au cours des états d'agression, et de plus en plus de données viennent appuyer l'idée que leur apport peut aider à la guérison du patient. A deficiency of total energy or of one or more essential nutrients, including vitamins A, B6, B12, C, and E, folic acid, zinc, iron, copper, selenium, essential amino acids and essential fatty acids, will impair immune function and increase susceptibility of the host to infectious pathogens. This is most likely because these nutrients are involved in the molecular and cellular responses to challenge of the immune system. Providing these nutrients to deficient individuals restores immune function and improves resistance to infection. Thus, appropriate nutrition is required in order for the host to maintain adequate immune defences towards bacteria, viruses, fungi, parasites and tumour cel circ;s. Although the intakes of several nutrients which result in greatest enhancement of immune function appear to be greater than recommended intakes, excess intake of certain nutrients also impairs immune responses. Some nutrients (e.g. glutamine, arginine) may become limiting in critical illness and there is mounting evidence that provision of these will aid patient recovery
Marine omega-3 fatty acids and inflammation
No full textMarine n-3 polyunsaturated fatty acids (PUFAs) may influence inflammation through a variety of mechanisms; many of these are mediated by, or at least associated with, changes in fatty acid composition of inflammatory cell membranes. Changes in fatty acid composition can modify membrane fluidity, cell signaling mechanisms leading to altered gene expression, and the pattern of lipid mediator production. Human inflammatory cells are typically rich in the n-6 fatty acid arachidonic acid, but the contents of arachidonic acid and of the n-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) can be altered through oral administration of EPA and DHA. Eicosanoids produced from arachidonic acid (e.g. prostaglandin E2) have roles in inflammation. EPA also gives rise to eicosanoids and these may have differing properties from those of arachidonic acid-derived eicosanoids, often being less potent. EPA and DHA give rise to resolvins which are anti-inflammatory and inflammation resolving. Increased membrane content of EPA and DHA (and decreased arachidonic acid content) results in a changed pattern of production of eicosanoids and probably also of resolvins. Changing the fatty acid composition of inflammatory cells also affects the production of peptide mediators of inflammation (cytokines, adhesion molecules etc.). Thus, the fatty acid composition of human inflammatory cells influences their function; the contents of arachidonic acid, EPA and DHA appear to be especially important. The anti-inflammatory actions of marine n-3 PUFAs suggest that they may be of therapeutic use in diseases involving chronic inflammatio
Effect of fat and fatty acid intake on inflammatory and immune responses: a critical review
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