Sesamoids of the metatarsophalangeal joint of the big toe: a sistematic review

Abstract: The first metatarsal sesamoid bones are not always taken into consideration when making a diagnosis, in pathologies that affect the region of the first metatarsal head. This is due to the insufficient knowledge of all the pathologies that can affect the sesamoids and the relative little incidence that they have. With the increment of sports activities, in particular the running, increasingly affects of the symptoms concerning this region are observed. Methods: A literature search was performed in 5 databases (Medline, PubMed, Scopus, Cochrane Library and BUCEA). The terms included in the search were: sesamoids, anatomy, biomechanics, sesamoids review and sesamoids pathology. In the initial search articles with no more than 10 years, only humans and revision texts are considered. Results: 24 articles were selected and include different pathologies with diagnosis using imaging tests and treatments, both conservative and surgical; as well as aspects from the biomechanics of the metatarsal-sesamoid joint. Conclusion: Sesamoids due of his anatomy, topography and function can be involved in a lot of pathologies; with similar signs and symptoms that can confuse the podiatry when he has to make a correct diagnosis or treatment.

Proof Methods for Corecursive Programs

Recursion is a well-known and powerful programming technique, with a wide variety of applications. The dual technique of corecursion is less well-known, but is increasingly proving to be just as useful. This article is a tutorial on the four main methods for proving properties of corecursive programs: fixpoint induction, the approximation (or take) lemma, coinduction, and fusion.

Na 1 Nachlass Max Horkheimer, 48 - Korrespondenzen u.a. an Thorsten Sellin (p. I 22, 227-395)

2 Briefe zwischen Luther L. Gobbel und Max Horkheimer, 28.09.1938, 03.10.1938; 2 Briefe zwischen Russell M. Story und Max Horkheimer, 15.03.1938; 1 Brief von Max Horkheimer an Ralph E. Boothby, 14.03.1938; 1 Brief von Max Horkheimer an Roswell G. Ham, 13.01.1938; 2 Briefe von Carl Schurz von der Memorial Foundation Philadelphia an Max Horkheimer, 1940; 7 Briefe zwischen Helen Schuster und Max Horkheimer, 1936, 1937, 1947-1948; 1 Brief von Liesel Schwaibold an Max Horkheimer, 19.01.1937; 6 Briefe zwischen Ph. Schwartz und Max Horkheimer, 1936-1937; 4 Briefe zwischen Ph. Schwart an Ludwig Jekels, 1936, 1937; 1 Brief von Ph. Schwartz an Karl Landauer,; 1 Brief von Eugen Schwarz an den Vater von Max Horkheimer, 08.12.1937; 1 Brief von Max Horkheimer an Eugen Schwarz, 31.12.1937; 5 Briefe zwischen Olga Therese Schwarz und Max Horkheimer, 1942; 8 Briefe zwischen Alfred Schweizer und Max Horkheimer, 1940-1941; 1 Lebenslauf von Arthur Heinrich Schweitzer und 1 Bericht über Arthur Heinrich Schweitzer; 1 Brief von Josef Schwoner an Max Horkheimer, 20.06.1941; 1 Brief von Max Horkheimer an L. H. Seelye, 01.04.1935; 1 Brief von Max Horkheimer an Dora Segall-Ziegellaub, 01.10.1935; 6 Briefe zwischen Matyes Seiber und Max Horkheimer, Juli 1936, 1936; 2 Briefe zwischen Alfred Seidenmann und Max Horkheimer, 29.02.1940, 12.03.1940 sowie Briefwechsel mit dem American Freinds Service Committee, Phiadelphia; 2 Briefe zwischen dem American Friends Service Committee und Max Horkheimer, 12.09.1940; 3 Rundschreiben von der Selbsthilfe Deutscher Ausgewanderter New York, 1937-1938; Antworten auf einen Fragebogen des Selective Service Occupational Questionnaire von Max Horkheimer, 27.10.1942; 1 Brief vom Selfhelp of Emigres from Central Europe an Margot von Mendelssohn, 22.12.1948; 8 Briefe zwischen Edwin R. A. Seligman und Max Horkheimer, 1938-1939; 1 Brief von Max Horkheimer an Eustace Seligman, 11.03.1940; 1 Brief von Seligmann und Cia an Friedrich Pollock, 06.04.1936; 2 Brife zwischen Milton C. Seligman und Max Horkheimer, 1947; 1 Brief Stephen Schäfer an Thorsten Sellin, 07.02.1939; 17 Briefe zwischen Thorsten Sellin und Max Horkheimer, 1938-1941; 1 Brief von der Sherwin Cody School of English an Max Horkheimer, 06.02.1939; 3 Briefe und 1 Beilage zwischen Edward A. Shils und Max Horkheimer, 1938; 10 Briefe zwischen James T. Shotwell und Max Horkheimer, 01.07.1940-1941;

Hydrogen-bonding in the structures of the 1:1 salts of isonipecotamide with a set of four polyfunctional monocyclic heteroaromatic carboxylic acids

The crystal structures of the 1:1 proton-transfer compounds of isonipecotamide (piperidine-4-carboxamide) with the monocyclic heteroaromatic carboxylic acids, isonicotinic acid, picolinic acid, dipicolinic acid and pyrazine-2,3-dicarboxylic acid have been determined at 200 K and their hydrogen-bonding patterns examined. The compounds are respectively anhydrous 4-carbamoylpiperidinium pyridine-4-carboxylate (1), the partial hydrate 4-carbamoylpiperidinium pyridine-2-carboxylate 0.25 water (2), the solvate 4-carbamoylpiperidinium 6-carboxypyridine-2-carboxylate methanol monosolvate (3), and anhydrous 4-carbamoylpiperidinium 3-carboxypyrazine-2-carboxylate (4). In compounds 1 and 3, hydrogen-bonding interactions give two-dimensional sheet structures which feature enlarged cyclic ring systems, while in compounds 2 and 4, three-dimensional structures are found. The previously described cyclic R2/2(8) hydrogen-bonded amide-amide dimer is present in 2 and 3. The hydrogen-bonding in 2 involves the partial-occupancy water molecule while the structure of 4 is based on inter-linked homomolecular hydrogen-bonded cation-cation and anion-anion associated chains comprising head-to-tail interactions. This work further demonstrates the utility of the isonipecotamide cation in the generation of chemically stable hydrogen-bonded systems, particularly with aromatic carboxylate anions, providing crystalline solids.