New Insight into the Role of the Metal Oxidation State in Controlling the Selectivity of the Cr-(SNS) Ethylene Trimerization Catalyst

2007 ◽  
Vol 26 (18) ◽  
pp. 4598-4603 ◽  
Author(s):  
Claire N. Temple ◽  
Sandro Gambarotta ◽  
Ilia Korobkov ◽  
Robbert Duchateau
Keyword(s):  
Oxidation State ◽  
Metal Oxidation ◽  
Ethylene Trimerization ◽  
Insight Into

Ethylene Trimerization with Cr−PNP and Cr−SNS Complexes:  Effect of Ligand Structure, Metal Oxidation State, and Role of Activator on Catalysis

2006 ◽  
Vol 25 (15) ◽  
pp. 3605-3610 ◽  
Author(s):  
David S. McGuinness ◽  
David B. Brown ◽  
Robert P. Tooze ◽  
Fiona M. Hess ◽  
John T. Dixon ◽  
...  
Keyword(s):  
Oxidation State ◽  
Metal Oxidation ◽  
Ligand Structure ◽  
Ethylene Trimerization

Role of the Metal Oxidation State in the SNS−Cr Catalyst for Ethylene Trimerization:  Isolation of Di- and Trivalent Cationic Intermediates

2006 ◽  
Vol 128 (28) ◽  
pp. 9238-9247 ◽  
Author(s):  
Amir Jabri ◽  
Claire Temple ◽  
Patrick Crewdson ◽  
Sandro Gambarotta ◽  
Ilia Korobkov ◽  
...  
Keyword(s):  
Oxidation State ◽  
Metal Oxidation ◽  
Ethylene Trimerization

Isolation of Single-Component Trimerization and Polymerization Chromium Catalysts: The Role of the Metal Oxidation State

2008 ◽  
Vol 47 (50) ◽  
pp. 9717-9721 ◽  
Author(s):  
Amir Jabri ◽  
Chris B. Mason ◽  
Yan Sim ◽  
Sandro Gambarotta ◽  
Tara J. Burchell ◽  
...  
Keyword(s):  
Oxidation State ◽  
Single Component ◽  
Metal Oxidation ◽  
Chromium Catalysts

Investigating the role of metal oxidation state on the degradation behaviour of LDPE

2009 ◽  
Vol 94 (7) ◽  
pp. 1033-1039 ◽  
Author(s):  
P.K. Roy ◽  
P. Surekha ◽  
R. Raman ◽  
C. Rajagopal
Keyword(s):  
Oxidation State ◽  
Metal Oxidation ◽  
Degradation Behaviour

Isolation of Single-Component Trimerization and Polymerization Chromium Catalysts: The Role of the Metal Oxidation State

2008 ◽  
Vol 120 (50) ◽  
pp. 9863-9867 ◽  
Author(s):  
Amir Jabri ◽  
Chris B. Mason ◽  
Yan Sim ◽  
Sandro Gambarotta ◽  
Tara J. Burchell ◽  
...  
Keyword(s):  
Oxidation State ◽  
Single Component ◽  
Metal Oxidation ◽  
Chromium Catalysts

scholarly journals Role of carboxylate ion and metal oxidation state on the morphology and magnetic properties of nanostructured metal carboxylates and their decomposition products

2008 ◽  
Vol 120 (6) ◽  
pp. 521-528 ◽  
Author(s):  
Aparna Ganguly ◽  
Rituparna Kundu ◽  
Kandalam V. Ramanujachary ◽  
Samuel E. Lofland ◽  
Dipankar Das ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Oxidation State ◽  
Metal Oxidation ◽  
Metal Carboxylates ◽  
Decomposition Products ◽  
Nanostructured Metal

Plasminogen Activation In Vivo upon Intravenous Infusion of DDAVP

1992 ◽  
Vol 67 (01) ◽  
pp. 111-116 ◽  
Author(s):  
Marcel Levi ◽  
Jan Paul de Boer ◽  
Dorina Roem ◽  
Jan Wouter ten Cate ◽  
C Erik Hack
Keyword(s):  
Monoclonal Antibodies ◽  
Plasminogen Activator ◽  
Plasma Levels ◽  
Fold Increase ◽  
Fibrinolytic System ◽  
Plasminogen Activation ◽  
Plasminogen Activator Activity ◽  
Insight Into

SummaryInfusion of desamino-d-arginine vasopressin (DDAVP) results in an increase in plasma plasminogen activator activity. Whether this increase results in the generation of plasmin in vivo has never been established.A novel sensitive radioimmunoassay (RIA) for the measurement of the complex between plasmin and its main inhibitor α2 antiplasmin (PAP complex) was developed using monoclonal antibodies preferentially reacting with complexed and inactivated α2-antiplasmin and monoclonal antibodies against plasmin. The assay was validated in healthy volunteers and in patients with an activated fibrinolytic system.Infusion of DDAVP in a randomized placebo controlled crossover study resulted in all volunteers in a 6.6-fold increase in PAP complex, which was maximal between 15 and 30 min after the start of the infusion. Hereafter, plasma levels of PAP complex decreased with an apparent half-life of disappearance of about 120 min. Infusion of DDAVP did not induce generation of thrombin, as measured by plasma levels of prothrombin fragment F1+2 and thrombin-antithrombin III (TAT) complex.We conclude that the increase in plasminogen activator activity upon the infusion of DDAVP results in the in vivo generation of plasmin, in the absence of coagulation activation. Studying the DDAVP induced increase in PAP complex of patients with thromboembolic disease and a defective plasminogen activator response upon DDAVP may provide more insight into the role of the fibrinolytic system in the pathogenesis of thrombosis.

On Metaphysics and the Political: A Polemics of Reading Baudelaire in the 1930s

2019 ◽  
Vol 58 (2) ◽  
pp. 249-259
Author(s):  
Joseph Acquisto
Keyword(s):  
Twentieth Century ◽  
Political Crisis ◽  
The Political ◽  
Modern Poetry ◽  
Progressive Politics ◽  
The World ◽  
Relationship Of ◽  
The Relationship ◽  
Insight Into

This essay examines a polemic between two Baudelaire critics of the 1930s, Jean Cassou and Benjamin Fondane, which centered on the relationship of poetry to progressive politics and metaphysics. I argue that a return to Baudelaire's poetry can yield insight into what seems like an impasse in Cassou and Fondane. Baudelaire provides the possibility of realigning metaphysics and politics so that poetry has the potential to become the space in which we can begin to think the two of them together, as opposed to seeing them in unresolvable tension. Or rather, the tension that Baudelaire animates between the two allows us a new way of thinking about the role of esthetics in moments of political crisis. We can in some ways see Baudelaire as responding, avant la lettre, to two of his early twentieth-century readers who correctly perceived his work as the space that breathes a new urgency into the questions of how modern poetry relates to the world from which it springs and in which it intervenes.

Dažu vācu muzikālo tradīciju pārnese latviešu kultūrtelpā 18. gadsimta II pusē

Letonica ◽  
2020 ◽  
Author(s):  
Māra Grudule
Keyword(s):  
18Th Century ◽  
Musical Instrument ◽  
German Society ◽  
Original Form ◽  
Musical Life ◽  
Popular Songs ◽  
Death Of Jesus ◽  
Musical Traditions ◽  
Insight Into

The article gives insight into a specific component of the work of Baltic enlightener Gotthard Friedrich Stender (1714–1796) that has heretofore been almost unexplored — the transfer of German musical traditions to the Latvian cultural space. Even though there are no sources that claim that Stender was a composer himself, and none of his books contain musical notation, the texts that had been translated by Stender and published in the collections “Jaunas ziņģes” (New popular songs, 1774) and “Ziņģu lustes” (The Joy of singing, 1785, 1789) were meant for singing and, possibly, also for solo-singing with the accompaniment of some musical instrument. This is suggested, first, by how the form of the translation corresponds to the original’s form; second, by the directions, oftentimes attached to the text, that indicate the melody; and third, by the genres of the German originals cantata and song. Stender translated several compositions into Latvian including the text of the religious cantata “Der Tod Jesu” (The Death of Jesus, 1755) by composer Karl Heinrich Graun (1754–1759); songs by various composers that were widely known in German society; as well as a collection of songs by the composer Johann Gottlieb Naumann (1741–1801) that, in its original form, was published together with notation and was intended for solo-singing (female vocals) with the accompaniment of a piano. This article reveals the context of German musical life in the second half of the 18th century and explains the role of music as an instrument of education in Baltic-German and Latvian societies.

The Role of Industry-Academia Collaborative Research in Mineral Exploration

2020 ◽  
Author(s):  
James Marlatt
Keyword(s):  
Collaborative Research ◽  
New Technologies ◽  
Mineral Exploration ◽  
Board Members ◽  
Technological Innovations ◽  
Development Programs ◽  
The University ◽  
Insight Into ◽  
Economic Mineral

ABSTRACT Many people may not be aware of the extent of Kurt Kyser's collaboration with mineral exploration companies through applied research and the development of innovative exploration technologies, starting at the University of Saskatchewan and continuing through the Queen's Facility for Isotope Research. Applied collaborative, geoscientific, industry-academia research and development programs can yield technological innovations that can improve the mineral exploration discovery rates of economic mineral deposits. Alliances between exploration geoscientists and geoscientific researchers can benefit both parties, contributing to the pure and applied geoscientific knowledge base and the development of innovations in mineral exploration technology. Through a collaboration that spanned over three decades, we gained insight into the potential for economic uranium deposits around the world in Canada, Australia, USA, Finland, Russia, Gabon, Namibia, Botswana, South Africa, and Guyana. Kurt, his research team, postdoctoral fellows, and students developed technological innovations related to holistic basin analysis for economic mineral potential, isotopes in mineral exploration, and biogeochemical exploration, among others. In this paper, the business of mineral exploration is briefly described, and some examples of industry-academic collaboration innovations brought forward through Kurt's research are identified. Kurt was a masterful and capable knowledge broker, which is a key criterion for bringing new technologies to application—a grand, curious, credible, patient, and attentive communicator—whether talking about science, business, or life and with first ministers, senior technocrats, peers, board members, first nation peoples, exploration geologists, investors, students, citizens, or friends.

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