8,089 research outputs found
Catalogue of Central College Library, at Fayette, Mo. 1887
No full textPamphlet entitled "Catalogue of Central College Library at Fayette, Mo. 1887." 57 pages. 15.5 cm high. Has index of author names, possibly missing some pages. Several writings in pencil and stray pencil marks
Revealing the influence of Mo addition on interphase precipitation in Ti-bearing low carbon steels
No full textMo is widely used as an effective microalloying element to improve mechanical performance of interphase precipitation steels, but the precise role of Mo in interphase precipitation behavior is not fully understood. In this contribution, interphase precipitation behavior in a series of Ti-Mo-bearing low carbon steels is systematically studied, and the role of Mo in interphase precipitates and its coarsening behavior is revisited. It is found that (Ti, Mo)C precipitates instead of TiC are formed in the Mo-containing alloys, and the average site fraction of Mo in (Ti, Mo)C is almost independent of the bulk Mo content. Moreover, the number density of interphase precipitates can be substantially enhanced by a minor addition of Mo, albeit it does not further rise with increasing the bulk Mo content. This is because the Mo fraction in (Ti, Mo)C rather than the bulk Mo content governs the driving force for precipitation nucleation and the interfacial energy of the (Ti, Mo)C/α and (Ti, Mo)C/γ interfaces. In addition to the reduced interfacial energy, decrease of Ti trans-interface diffusivity has been identified as another key reason for the enhanced carbide coarsening resistance in Mo-containing alloys.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Novel Aerospace Material
Studies on Bis(imido) molybdenum complexes containing unsaturated hydrocarbon ligands
No full textThis thesis describes the synthesis and characterisation of molybdenum bis(imido) complexes containing unsaturated hydrocarbon ligands. A principal objective of the work was to examine the effect of various imido substituents on the coordination number of the complex and the orientations adopted by olefin and acetylene ligands. Chapter One highlights areas of transition metal chemistry relevant to the thesis, with particular emphasis on the psuedo-isolobal analogy between cyclopentadienyl and imido ligands, A convenient one-pot synthesis of molybdenum bis(imido) complexes of the type Mo(NR)(NR')Cl(_2).DME (R=R'=l-adamantyl, 2-t- BUC(_6)H(_4); R=2,6-i-Pr(_2)C(_6)H(_3), R'=t-Bu) is described in Chapter Two. Mo(N-l- adamantyl)(O)Cl(_2).DME has been synthesised, and its structure determined by single crystal X-ray diffraction.- The preparation of olefin complexes Mo(NR)(NR')(C(_2)H(_4))(PMe(_3))n (R=R'=l-adamantyl, n=l; R=R'=2-t-BuC(_6)H(_4), n=2; R=2,6-i-Pr(_2)C(_6)H(_3), R'=t- Bu, n=l) is outlined in Chapter Three. Structural information derived from NMR data has allowed comparison with metallocene-like olefin adducts. Chapter Four describes the synthesis of complexes containing σ-bound phenyl ligands (Mo(NR)(NR')(σ-C(_6)H(_5))(PMe(_3)) (R=R'=l-adamantyl, 2-t-BuC(_6)H(_4); R=2,6-i-Pr(_2)C(_6)H(_3), R'=t-Bu)) as potential precursors to benzyne complexes. Chapter Five describes the preparation of diphenylacetylene complexes Mo(NR)(NR')(PhC=CPh)(PMe(_3)), structural information derived from NMR data allows comparison with previously known metallocene-like acetylene complexes. Full experimental details for Chapters Two to Five are given in Chapter Six
Avatars of the author in Mo Yan's novels
No full textL’écrivain chinois Mo Yan a mis en scène dans son œuvre romanesque des avatars de l’auteur, identifiés à lui par le nom dans deux romans et par le rôle de créateur du récit dans plusieurs récits. Ces représentants ne sauraient être identifiés à l’auteur empirique, mais peuvent être interprétés à l’aune de ce que représente pour nous l’auteur, au sens large, ou dans une visée individuelle, lorsque nous analysons leur caractérisation en fonction d’autres textes, fictifs ou référentiels, construisant la figure biographique, théorique et fantasmatique de l’auteur. Outre qu’elle joue sur l’aporie de sa présence dans la fiction, cette représentation métafictionnelle a des fonctions diverses. Dans Le Pays de l’alcool, elle souligne l’allégorie tout en déjouant la censure ; dans La Dure Loi du karma, elle brosse un portrait comique du romancier, reflétant ses différents rôles pour le lecteur et la société. La suite de l’étude porte sur des narrateurs révélant un statut de créateur du récit, de sorte qu’ils provoquent une distanciation et un doute sur leur situation diégétique, en les associant à une tendance métafictionnelle présente dans l’œuvre de Mo Yan depuis son premier roman long, Le Clan du sorgho rouge, où elle est l’effet d’un narrateur omniscient et présent dans l’univers de la fiction. Ces figures d’autorité thématisent l’imagination à l’œuvre, tout en signalant l’altérité de la figure de l’auteur que le lecteur infère de ses indices supposés. Elles représentent l’auteur en une logique non référentielle, comme produit d’un ensemble mouvant d’hypothèses, issues d’une interprétation des récits comme éléments constitutifs de l’œuvre.In his fictional works, Chinese novelist Mo Yan created avatars of the author, who are either identified by their name such as the characters Mo Yan in The Republic of Wine and in Life and Death Are Wearing Me Out or by a creative role they reveal, in other narratives. Both doubles, Mo Yan’s fictional homonyms, cannot be considered as the empirical author, and yet may be interpreted in the light of what the author means to us, whether in a broad or individual sense, when their characteristics are confronted with the biographical, theoretical and fantasmatic figure of Mo Yan which other texts create. Drawing attention to the aporetical presence of the author in a universe he created, metafictional author representations have various functions. In The Republic of Wine, it enlights the allegorical value of the novel and, to the real author, is a means to deter censorship. In Life and Death Are Wearing Me Out, Mo Yan is a parody of a novelist, where the role he plays for the reader and in society appear in a nutshell. Next, the sign of the author is to be extended to other narrators who reveal, more or less explicitly, that they create the narrative, thus inducing readers to suspend belief and reconsider their diegetic posture. Beginning with his first long novel Red Sorghum, metafiction has been an obsessive tendency in Mo Yan’s novels, making imagination a theme of the novel while suggesting the figure of the author a reader infers from the text is but a shifting body of hypotheses, which envision narratives a part of the whole works that make the author
Synthesis, structural and magnetic properties of TM22+[MOIV(CN)(8)]center dot nH(2)O
No full textOctacyanomolybdates (OCMs) TM2 divided by[Mo(CN)(8)]center dot nHO, where TM is Mn, Fe, Co, Ni, Cu were synthesised and characterised by IR spectroscopy and UV-VIS spectroscopy. The UV-VIS spectrum showed the intervalence charge transfer (IVCT) band between Mo-IV-CN-Cu-II and Mo-V-CN-Cu-I around 510 nm. Studied OCMs adopt tetragonal crystal structure. The H-1 NMR signals reflect the magnetic moment of the TM2- ions (mu(P)). The decay rates of free induction decay (FID) signals
increase as pp and the applied static rf-field increases. The
spin-lattice relaxation times at 27.7 MHz vary from 0.0187 ins (Mn) up to 0.45 ms (Cu). Magnetization measurements indicate long-range magnetic ordering of Mn- and Co- OCMs with the Curie temperature T-c = 4 K. The remaining OCMs (TM is Fe, Ni, Cu) are paramagnetic down to T = 1.9 K
Campagnes Rodriguez 1 et 2: Le point triple de Rodriguez et les dorsales de l'ocean Indien
No full textThe first Rodriguez Cruise started on 14 January 1984 from Colombo and ended at Reunion Island on 16 February 1984. The second cruise left Reunion Island on 3 April 1984 and was completed in Singapore on 7 May 1984. The program included a detailed Seabeam, gravimetric and magnetic survey of the Rodriguez Triple Junction over an area of 7,200 km super(2) and similar surveys of an axial segment of each of the 3 associated spreading ridges. The 2 cruises together total 27,000 km of profiles. The scientific objectives of the Rodriguez cruises based upon detailed bathymetric, gravimetric and magnetic mapping of the surveyed areas are summarized
Effect of Zinc Supplementation on Growth of Low Birth Weight Infants Aged 1–6 Mo in Ardabil, Iran
No full textObjective To assess the effect of zinc supplementation on growth of low birth weight (LBW) infants aged 1–6 mo. Methods LBW infants were enrolled at birth and randomly assigned to receive 5 mg elemental Zn per day (n=45) or placebo (n=45) until 6 mo of age. They were followed monthly for information on compliance; anthropometric measurements were performed monthly. Results After randomization, 5 infants from zinc group and 9 from placebo group were excluded. At 6 mo of age, significantly greater weight gains were observed in the zinc than in the placebo group (4995±741g in zinc group vs. 3896±865 g in placebo group, p = 0.036). Length gain during the study period improved in zinc group (16.9±8.2 cm vs. 15.1±4.1 cm, p = 0.039); after zinc supplementation head circumference were increased (8.7±1.4 cm vs.7.4±
1.5 cm p<0.001). In male infants, total weight gain and height and head circumference gain were higher in the zinc than in the placebo group. However, only head circumference change was statistically significant. A similar trend was observed among female infants, but these differences were not statistically significant. There was no significant relation between breast-feeding status and the main outcome variables. Conclusions Infants in the present study showed improve¬ments in growth rate, but more studies are required in this field to confirm this fact
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Author Correction: The disease resistance protein SNC1 represses the biogenesis of microRNAs and phased siRNAs.
No full textThe original version of this Article contained an error in the spelling of the author Beixin Mo, which was incorrectly given as Beixing Mo. This has now been corrected in both the PDF and HTML versions of the Article
Compositive role of refractory element Mo in improving strength and ductility of face-centered-cubic complex concentrated alloys
No full textComplex concentrated alloys (CCAs) with a face-centered-cubic (FCC) structure exhibit remarkable mechanical properties, introducing the expansion of compositional space in alloy design for structural materials. The formation of a single solid-solution phase is enabled by configuring various 3d-transition elements, while doping other elements even of a small portion generally leads to the formation of brittle intermetallic compounds. Herein, we demonstrate through a systematic investigation of single FCC (CoNi)100-xMox alloys that a wide range of refractory element Mo can simultaneously improve the strength and ductility while sustaining the solid-solution structure. The addition of Mo with a larger atomic size than those of 3d-transition elements introduces severe lattice distortion in the FCC lattice and causes grain-boundary segregation enriched by Mo atoms. In addition, increasing Mo content effectively reduces the stacking fault energy (SFE). The increased lattice distortion with Mo content enhances the solid-solution strengthening of the alloys. Besides, along with reduced SFE and stabilization of the dislocation emission site by grain-boundary segregation, this elevated solid-solution strengthening increases grain-boundary strengthening, reaching a yield strength of ∼1 GPa. Moreover, the reduction of SFE with increasing Mo results in the transition of dislocation substructures and the refinement of deformation twins, allowing for enhanced strain-hardening capability and thus ∼1.3 GPa tensile strength and ∼50% ductility. Such compositive and synergetic effects of refractory element Mo enable the CCAs with a single FCC solid solution to overcome the strength and ductility trade-off.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Team Marcel Sluite
First-principles study of magnetic properties in Mo-doped graphene
No full textThe geometric structure, electronic structure and magnetic properties of substitutionally Mo-doped graphene are studied based on first-principles calculations. Mo introduces a magnetic moment of 2 mu(B) in graphene. The magnetic properties and band structure can be well understood using a hybridization model. Magnetic coupling between two Mo impurities is also discussed. Depending on the relative position of the two Mo impurities, the ground state of the system can be ferromagnetic, antiferromagnetic or paramagnetic. A Ruderman-Kittel-Kasuya-Yosida (RKKY)-like behavior is observed when the distance between Mo atoms is relatively large. However, when the distance between Mo atoms is rather small, the RKKY model is not suitable to describe the magnetic ordering due to their non-neglectable direct interactions
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