scholarly journals Impact of Confinement on the Dynamics and H-Bonding Pattern in Low-Molecular Weight Poly(propylene glycols)

2020 ◽  
Vol 124 (32) ◽  
pp. 17607-17621
Author(s):  
Agnieszka Talik ◽  
Magdalena Tarnacka ◽  
Monika Geppert-Rybczyńska ◽  
Barbara Hachuła ◽  
Kamil Kaminski ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Low Molecular Weight ◽  
Poly Propylene

Influence of Low-Molecular-Weight Diamines in the Direct Imidation of Poly(propylene)-Grafted Maleic Anhydride by Melt Reaction

2007 ◽  
Vol 292 (9) ◽  
pp. 1012-1019 ◽  
Author(s):  
Sofia Vazquez-Rodriguez ◽  
Saúl Sánchez-Valdes ◽  
Francisco J. Rodríguez-González ◽  
Maria C. González-Cantú
Keyword(s):  
Molecular Weight ◽  
Maleic Anhydride ◽  
Low Molecular Weight ◽  
Poly Propylene

Isotactic Poly(propylene) Crystallization: Role of Small Fractions of High or Low Molecular Weight Polymer

2005 ◽  
Vol 206 (1) ◽  
pp. 125-134 ◽  
Author(s):  
Aadil Elmoumni ◽  
Ramon A. Gonzalez-Ruiz ◽  
E. Bryan Coughlin ◽  
H. Henning Winter
Keyword(s):  
Molecular Weight ◽  
Low Molecular Weight ◽  
Molecular Weight Polymer ◽  
Poly Propylene

A high-performance oil-free backing pump for electron microscopes

1978 ◽  
Vol 36 (1) ◽  
pp. 110-111
Author(s):  
G.K.W. Balkau ◽  
E. Bez ◽  
J.L. Farrant
Keyword(s):  
Molecular Weight ◽  
Electron Microscope ◽  
Hot Spots ◽  
High Performance ◽  
Carbonaceous Material ◽  
Contamination Rate ◽  
Low Molecular Weight ◽  
Principal Source ◽  
Rotary Pumps ◽  
Electron Microscopes

The earliest account of the contamination of electron microscope specimens by the deposition of carbonaceous material during electron irradiation was published in 1947 by Watson who was then working in Canada. It was soon established that this carbonaceous material is formed from organic vapours, and it is now recognized that the principal source is the oil-sealed rotary pumps which provide the backing vacuum. It has been shown that the organic vapours consist of low molecular weight fragments of oil molecules which have been degraded at hot spots produced by friction between the vanes and the surfaces on which they slide. As satisfactory oil-free pumps are unavailable, it is standard electron microscope practice to reduce the partial pressure of organic vapours in the microscope in the vicinity of the specimen by using liquid-nitrogen cooled anti-contamination devices. Traps of this type are sufficient to reduce the contamination rate to about 0.1 Å per min, which is tolerable for many investigations.

Low-molecular-weight heparin in the prevention and treatment of thromboembolic disorders

1998 ◽  
Vol 1 (5) ◽  
pp. 166-174 ◽  
Author(s):  
Evelyn R Hermes De Santis ◽  
Betsy S Laumeister ◽  
Vidhu Bansal ◽  
Vandana Kataria ◽  
Preeti Loomba ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Low Molecular Weight Heparin ◽  
Low Molecular Weight ◽  
Prevention And Treatment
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