5,079 research outputs found
On the functional morphology of the alimentary canal of the sea star Asterias forbesi (Desor)
No full textThis investigation embodies a study of several aspects of the anatomy and physiology of the organs of the alimentary canal of Asterias forbesi (Desor). The specific purposes of the investigation were several folds (1) the development of a method of rapid field identification to differentiate between A. forbesi and the confusingly similar Asterias vulgaris Verrill; (2) a detailed study of the gross and minute morphology of the alimentary tract, and a standardization of the terms applied to the various organs; (3) a preliminary investigation of the digestive enzymes of the canal; (4) a study of the mechanism of the eversion of the stomach during feeding; (5) a study of the comparative growth of A. forbesi on various lamellibranch and gastropod diets; and (6) a preliminary physio-ecological investigation of the method of predation.Includes bibliographical references (leaves 146-156)by Frederick Allen AldrichPh.D
Esperienza ed evento della verità. Pratica filosofica e astrazione scientifica nel pensiero di A.N. Whitehead
No full textThis article analyzes the relationship between philosophy, experience and event in A.N. Whitehead’s thought. From the critics of the concept of object, the author retraces and describes the peculiar “abstract-concrete dialectic”, at the center of the researches concerning the perceptual experience.
Furthermore, according to Whitehead’s later works, she demonstrates how the philosophical practice is different from all other kinds of science, although it requires science itself because of the co-implication of object and event, abstraction and recognition
Il "Guerrin Meschino" di Gesualdo Bufalino : un'"opra" in versi
No full textGesualdo Bufalino first published Il Guerrin Meschino in 1991 in a non-commercial edition. In 1993, after a deep revision, he re-published his work with publisher Bompiani: the novel has a modified plot, and the author decided to insert three new poems in addition to the opening and closing poems, formerly present in 1991’s edition. This paper, in its entirety supported by handwritten material preserved at Fondazione Gesualdo Bufalino (Comiso), is divided in two parts: the first part illustrates the differences between the first and the second edition, the second part provides a critical edition of the five poems
RRS Discovery Cruise 321, 24 Jul-23 Aug 2007. Biophysical interactions in the Iceland Basin 2007
No full textD321 was the first of three National Oceanography Centre ‘process study’ research cruises to be run by the Ocean Biogeochemistry and Ecosystems research group under the NERC Oceans 2025 research programme. The scientific work began by carrying out some of the extended Ellett Line stations on the way out to our study region; which centred around the historical JGOFS Ocean Weather Station India site (~ 59° N, ~ 19° W) and the northward turn of the extended Ellett line at 20° W. The Iceland Basin, like much of the N. Atlantic subpolar gyre, is characterised by a ‘bloom and bust’ seasonal cycle. Spring stratification triggers a major diatom dominated bloom event. This bloom is short lived, limited by silicate (orthosilicic acid) exhaustion (Brown et al., 2003). Two community succession pathways commonly follow the demise of the diatom bloom; typically through dinoflagellate and/or coccolithophore production. The spring bloom is dominated by eddy scale (several 10's of km) patchiness, driven by the upward and downward pumping effect of eddies on the newly forming spring stratification. However these eddy structures have another, more important, impact on phytoplankton production (Allen et al., 2005). In the release of potential energy, eddies effect a real three dimensional exchange of water across the thermocline bringing new dissolved nutrients from deeper waters up into the photic zone and transporting biogenic particles into the deep ocean. Thin ribbon like structures around the edges of eddies are clearly seen in ocean colour satellite images. The four repeated surveys carried out during D321 observed the evolution of an ‘eddy dipole’ in a background ocean full of eddies and other turbulent motions. Daily, near real-time, satellite images and in-situ vessel mounted acoustic current profiling were used to determine the movement of the eddy centres and the dipole central jet. Targeted nets and water collection within the various components of the eddy dipole enabled the assessment of its biological impacts.Since 1996 NOCS and SAMS have been occupying an extended version of the Ellett Line that runs all the way to Iceland. The Extended Ellett line is important oceanographically because it completes the measurements of the warm saline water flowing into the Nordic Seas from the eastern North Atlantic. It also monitors around half of the returning deep and cold current, the overflow water (the rest returns to the Atlantic via the Denmark Strait to the west of Iceland).There is little added cost, either in time or financially, in making a number of biogeochemical measurements using water samples from the hydrographers' CTD stations. Thus, recently, the scientific interests in the Extended Ellett line have become more multidisciplinary; the 2006 occupation was no exception. Samples were filtered for POC, HPLC studies and trace aluminium concentration determination, in addition some extra time was found for a number of zooplankton net hauls.<br/
Bibliographie
No full textLa bibliographie ci-dessous ne comprend que les références citées dans le texte et non l’ensemble des ouvrages consultés. Pour les éléments d’une bibliographie générale de la région on consultera : TAYLOR 1951, O’REILLY 1958 et KRAUSS 1971. Allen, M.R. – « Land and lignage in West Aoba », m.s. 1960, 25 p. Allen, M.R. – The ndui ndui : a study in the social structure of a New Hebridean community. Canberra, A.N.U. Press, 1964. Ph. D. Thesis. Allen, M.R. – « Kinship terminology and marriage in V..
Bibliographie
No full textLa bibliographie ci-dessous ne comprend que les références citées dans le texte et non l’ensemble des ouvrages consultés. Pour les éléments d’une bibliographie générale de la région on consultera : TAYLOR 1951, O’REILLY 1958 et KRAUSS 1971. Allen, M.R. – « Land and lignage in West Aoba », m.s. 1960, 25 p. Allen, M.R. – The ndui ndui : a study in the social structure of a New Hebridean community. Canberra, A.N.U. Press, 1964. Ph. D. Thesis. Allen, M.R. – « Kinship terminology and marriage in V..
A FEW WORDS ABOUT THE TEACHER. IN MEMORY OF THE EXCELLENT TEACHER AND SCIENTIST M.R. SAPIN
No full textM.R. Sapin (1925–2015) was a professor at I.M. Sechenov First Moscow State Medical University, honorary academician of Russian academy of medical sciences (1988), and an outstanding representative of the Moscow anatomical school of the middle of XX – early XXI century. From the very beginning of his medical training, Mikhail Romanovich got interested in anatomy, especially in angiology and lymphology, and later concentrated on its studying. The author of more than 30 text books and guidelines for schools, universities, and colleges, Mikhail Romanovich was the doctoral and thesis advisor of 51 Ph.D. and approximately 70 MD dissertations. M.R. Sapin made a significant contribution to the development of anatomical education providing the departments with a various range of dry and wet specimens. His stunning and effective work as a tutor was highly appreciated by his students and colleagues, Russian and foreign anatomists. M.R. Sapin was the leader of the Laboratory of Functional Anatomy since 1972, president of the International Association of Morphologists (1992–2006), chairman of the expert commission of Higher Attestation Commission (1959–1994), etc. A man of a great willpower, M.R. Sapin faced a lot of obstacles in his life and research work but overcame that all successfully. The article presents the most important facts of anatomist’s career and lifetime.</jats:p
Verslag van het voorgevallene tijdens het hooge opperwater op de Nederlandsche rivieren in den winter van 1919 op 1920
No full textNadat de Rijn op 20 December 1919 tot even beneden den middelbaren zomerstand 1901-1910 (M.R.) was gedaald vertoonde zich op die rivier een sterke en vrij snelle was, waardoor het water te Keulen tot 6m +M.R. bij het einde van het jaar steeg. In de daarop volgende 11 dagen daalde de waterstand tot 1.5m +M.R. om daarna in 5 dagen weder te rijzen tot den zeer hoogen stand van 7m +M.R. Door een aanvankelijk sterken later flauweren val liep de stand weder terug tot 1.5m +M.R. op 30 Januari. Ook op de Maas vertoonden zich twee dicht op elkaar volgende sterke wassen. Bij den aanvang van den eersten was op 19 december stond het water te Maastricht op ruim 1m +M.R. en steeg het in 6 dagen tot 4.37m +M.R.; in de daaropvolgende 9 dagen bleef de stand steeds hoger dan 4m +M.R. en daalde toen tot ongeveer 2m +M.R. op 10 Januari 1920. De tweede was trad op laatsgenoemde datum in waarbij het water oplied tot 4.94m +M.R. op 15 Januari. Het water daalde daarna dadelijk en was op 29 Januari tot ongeveer 2m +M.R. weggevallen. Bij den tweeden was op Rijn en Maas werden de hoogst bekende waterstanden bij open rivieren overtroffen te Keulen met 7 cm en te Maastricht met 2 cm. De rivieren waren ijsvrij.Hoogwaterversla
Hundreds of variants clustered in genomic loci and biological pathways affect human height
No full textMost common human traits and diseases have a polygenic pattern of inheritance: DNA sequence variants at many genetic loci influence the phenotype. Genome-wide association (GWA) studies have identified more than 600 variants associated with human traits(1), but these typically explain small fractions of phenotypic variation, raising questions about the use of further studies. Here, using 183,727 individuals, we show that hundreds of genetic variants, in at least 180 loci, influence adult height, a highly heritable and classic polygenic trait(2,3). The large number of loci reveals patterns with important implications for genetic studies of common human diseases and traits. First, the 180 loci are not random, but instead are enriched for genes that are connected in biological pathways (P = 0.016) and that underlie skeletal growth defects (P<0.001). Second, the likely causal gene is often located near the most strongly associated variant: in 13 of 21 loci containing a known skeletal growth gene, that gene was closest to the associated variant. Third, at least 19 loci have multiple independently associated variants, suggesting that allelic heterogeneity is a frequent feature of polygenic traits, that comprehensive explorations of already-discovered loci should discover additional variants and that an appreciable fraction of associated loci may have been identified. Fourth, associated variants are enriched for likely functional effects on genes, being over-represented among variants that alter amino-acid structure of proteins and expression levels of nearby genes. Our data explain approximately 10% of the phenotypic variation in height, and we estimate that unidentified common variants of similar effect sizes would increase this figure to approximately 16% of phenotypic variation (approximately 20% of heritable variation). Although additional approaches are needed to dissect the genetic architecture of polygenic human traits fully, our findings indicate that GWA studies can identify large numbers of loci that implicate biologically relevant genes and pathways
The Durham mint: the control, organization, profits and out put of an ecclesiastical mint
No full textThe university libraries of Durham and Cambridge have been the indispensable foundation of my work. I have spent countless enjoyable and extremely fruitful hours in the Archives and Special Collections department of Durham University Library, and in the Dean and Chapter Library of Durham Cathedral. The archivists and librarians of those two great sources of material and inspiration for Durham historians have always been helpful, often beyond the call of duty. Mr Patrick Musset and Mr Alan Piper helped me with many tricky matters of palaeography, and Ms Linda Drury has been a source of wisdom concerning Weardale mining. Mr Roger Norris has always offered a friendly and tolerant welcome in the Dean and Chapter Library. My greatest debt of gratitude in the Durham fellowship of archivists and librarians is to Mr Martin Snape, who laboriously checked my calendar of documentary evidence, and brought to my attention the mint indenture of 1367. The Public Record Office and the Borthwick Institute, University of York, have also been safe havens of documentary research, and their staffs have been unfailing in their friendly help. Dr Constance Fraser generously provided many transcripts of PRO documents from the reigns of Edward I and Edward, produced for her own research, which have been invaluable. Miss Ethel Stokes deserves an extremely posthumous mention for her excellent transcripts of thirteenth- century PRO documents, made for H.B.E. Fox shortly before the First World War. Mrs Yvonne Harvey and Dr Barrie Cook have provided unpublished information about the dies in the PRO and the British Museum respectively. Miss M.M. Archibald, Mr Christopher Bailey, Mr Edward Besly, Ms Kristin Bornholdt, Dr Cook, Mr Robert Heslip, Mr N.M.McQ. Holmes, Mr D. Lockwood, Mr Nicholas Mayhew, and Mr D. Robinson have very generously provided unpublished hoard data. The corpus of hoards would be much poorer without the contributions of Mr Besly, Dr Cook, and Mr Holmes in particular. Mr Holmes and Mr Keith Sugden have patiently answered onerous enquiries about obscure hoard publications. Dr Sean Miller has provided important data from the Early Medieval Corpus of single finds. The Ashmolean Museum, Oxford, the British Museum, Sunderland Museums, and last but not least my employers the Fitzwilliam Museum, Cambridge, have provided coins for illustration. Four collectors have also allowed their coins to be illustrated: Mr Joe Bispham, Mr Denis Martin, Dr Ian Taylor, and Mr Robert Thomas. Professor T.V. Buttrey has read the thesis with great care, saving me from a multitude of errors, although he could not save me from the sin of attempting to estimate mint outputs. Dr Mark Blackburn, Dr Robin Eaglen, Mr Mayhew, Mr Jeffrey North, Dr Peter Spufford, and Lord Stewartby have read parts of the thesis and offered many valuable comments and suggestions. They and others have greatly encouraged me in a seemingly interminable project by their interest in its progress, and Mr David Palmer and Mr Christopher Wren also deserve a particularly honourable mention in that regard. The laurel must go to my supervisor, Mr John Casey, who has shown superhuman endurance in the six years since he first succumbed to the obviously mad idea that a Roman archaeologist could supervise a thesis on a medieval mint. John has been a good supervisor, and a good friend. My greatest regret in completing this thesis is that my mother, Vera, and father, George, did not live to see the end of a project that depended so much upon their love and encouragement
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