3,780 research outputs found
Supporting Data for “Renewable, Degradable, and Chemically Recyclable Cross-Linked Elastomers”
No full textFull description of the data is in the attached Readme file.These files contain data along with associated output from instrumentation supporting all results reported in Jacob P. Brutman, Guilhem X. De Hoe, Deborah K. Schneiderman, Truyen N. Le, and Marc A. Hilmyer Renewable, Degradable, and Chemically Recyclable Cross-Linked Elastomers. Industrial & Engineering Chemistry Research 2016 55 (42), 11097-11106. In Brutman et. al. we found: Most commercial elastomers, typified by vulcanized natural rubber, are cross-linked polymers and as such cannot easily be reprocessed or recycled. While some are derived from renewable resources, the majority are produced from petroleum feedstocks and do not easily degrade. In this study, renewable elastomers based on β-methyl-δ-valerolactone were produced using two different methodologies: (1) tandem copolymerization/cross-linking with a bis(six-membered cyclic carbonate); (2) cross-linking of a linear poly(β-methyl-δ-valerolactone) homopolymer with a free-radical generator. The mechanical properties of these materials were investigated; tensile strengths of up to 12 MPa and elongations of up to 2000% were observed. Inclusion of a filler (fumed silica) was used to enhance the performance of the elastomers without significant loss of elasticity, with some composites exhibiting tensile strengths nearly double that of the neat elastomer. Aqueous degradation studies indicated that the materials were capable of degradation in acidic and basic conditions at 60 °C. Moreover, these cross-linked elastomers can also be chemically recycled, yielding monomer in high purity and yield (>91% and 93%, respectively).The Center for Sustainable Polymers at the University of Minnesota, a National Science Foundation supported center for Chemical Innovation (Grant CHE-1413862).Hillmyer, Marc A; Brutman, Jacob P; De Hoe, Guilhem X; Schneiderman, Deborah K; Le, Truyen, N. (2017). Supporting Data for “Renewable, Degradable, and Chemically Recyclable Cross-Linked Elastomers”. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/D6V599
Jacob Viner’s Reminiscences from the New Deal (February 11, 1953)
No full textThis paper presents and reproduces an unpublished oral history interview given by Jacob Viner in 1953. The interview released by Viner for the Columbia Oral History Project gives us a valuable opportunity to throw light on his advisory activity during the New Deal Era. In our introduction we attempt to make a critical appraisal of Viner's reminiscences and to state the contribution they can provide to our general knowledge of the period. In addition, we also attempt to find out some biographical and interpretative elements useful to understand Viner’s own vision and his contribution to important economic policy processes during the New Deal.
The use of carboxylic acids as traceless directing groups for regioselective C-H bond functionalisation
No full textThe ability to selectively functionalise a specific C-H bond is a long-standing challenge due to the ubiquity of such bonds in organic molecules. One of the most common approaches to overcome this obstacle consists of installing directing groups into substrates to direct the functionalisation towards the desired C-H bond, leaving behind the directing group in the molecule. Alternatively, carboxylic acids have been employed as traceless directing groups that are easily removed after carboxylic acid-directed installation of the desired functionality. This review focuses on the development of this concept and its application to organic synthesis during the last decade.</p
Correspondence from Jacob C. Kellem to Daniel R. Porter, 1973
No full textThe sender, Jacob C. Kellem, disagrees with the opinion expressed and provides reasoning based on Condition 2 of the loan agreement between the Ohio Historical Society and Ms. Pauline A. Young. Condition 2 stipulates that Ms. Young retains all literary rights to the papers. The letter asserts that the society failed in its duty to prevent the public, including those ordering single copies, from violating these rights. Jacob C. Kellem seeks prompt advice on compensation and prevention of future violations. The letter also mentions the potential modification of the existing agreement and Ms. Young's intent to stand firm on her rights while considering a reasonable compromise. The sender requests clarity on whether further legal action will be necessary to uphold Ms. Young's rights
Correspondence from Jacob C. Kellem to Daniel R. Porter, 1973
No full textThe letter responds to Mr. Porter's letter from November 14, 1973, regarding a disagreement over the interpretation of Paragraph 4 of a signed Agreement. It disputes the availability of single copy reproductions, emphasizing that they should only be accessible to those studying the collection. The letter also raises concerns about the publication of a microfilm edition and the use of proceeds from its sale, asserting Ms. Young's right to a fair share. Jacob C. Kellem conveys a willingness to escalate the matter if the issue is not resolved satisfactorily
Document n°57 : planche du Traité complet de l’anatomie de l’homme de Bourgery et Jacob
No full textVous pouvez télécharger ci-dessous les documents analysés dans l'article de Martial Guédron, « Les petites mains de l’anatomie en couleur : à propos du Traité complet de l’anatomie de l’homme de Bourgery et Jacob », RH19, n°57, 2018/2, p. 137-149 Jean-Marc Bourgery, Nicolas-Henri Jacob, Traité complet de l'anatomie de l'Homme comprenant la médecine opératoire, Paris, C.-A. Delaunay, 1831-1854, 8 vol., Tome III, planche 100 A la demande de l'auteur, nous nous permettons également de relay..
Three-dimensional measurements of heavy and light particle dispersion in shear turbulence
No full textWe present new experimental data concerning the statistics of heavy and light particles dispersed at low concentrations in a homogeneous turbulent shear flow. Information on both the spatial distribution and on the relative velocity of the dispersed phases is obtained by accurate three-dimensional optical measurements, and will allow to comparatively discuss the issues of turbulent clustering and small scale anisotropy by analyzing the scale- and angular dependence of suitable particle observables computed in the two cases
Chronique Droit fiscal de l'UE - La Cour apporte des précisions techniques mais incomplètes sur les conditions de report d'imposition des plus-values réalisées après le transfert de domicile d'un contribuable hors de France et sur les modalités de prise en compte des moins-values éventuelles
No full textInternational audience(CJUE, 1re ch., 22 mars 2018, aff. jtes C-327/16 et C-421/16, Marc Jacob c/ ministre des Finances et des Comptes publics et ministre des Finances et des Comptes publics c/ Marc Lassus
Chronique Droit fiscal de l'UE - La Cour apporte des précisions techniques mais incomplètes sur les conditions de report d'imposition des plus-values réalisées après le transfert de domicile d'un contribuable hors de France et sur les modalités de prise en compte des moins-values éventuelles
No full textInternational audience(CJUE, 1re ch., 22 mars 2018, aff. jtes C-327/16 et C-421/16, Marc Jacob c/ ministre des Finances et des Comptes publics et ministre des Finances et des Comptes publics c/ Marc Lassus
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