نتایج جستجو برای: thermal fractionation

تعداد نتایج: 236413  

Context:  The major motivation for the preparation of the plasma derived biological medicine was the treatment of casualties from the Second World War.  Due to the high expenses for preparation of plasma derived products, achievement of self-sufficiency in human plasma biotechnological industry is an important goal for developing countries.Evidence Acquisition:  The complexity of the bloo...

2001
Jeffrey P. Severinghaus Alexi Grachev Mark Battle

[1] Abstract: Air withdrawn from the top 5–15 m of the polar snowpack (firn) shows anomalous enrichment of heavy gases during summer, including inert gases. Following earlier work, we ascribe this to thermal diffusion, the tendency of a gas mixture to separate in a temperature gradient, with heavier molecules migrating toward colder regions. Summer warmth creates a temperature gradient in the t...

Journal: :Analytical chemistry 2005
Franco Basile Galina E Kassalainen S Kim Ratanathanawongs Williams

A simple interface based on an oscillating capillary nebulizer (OCN) is described for direct deposition of eluate from a thermal field-flow fractionation (ThFFF) system onto a matrix-assisted laser desorption/ionization (MALDI) probe. In this study, the polymer-containing eluent from the ThFFF system was mixed on-line with MALDI matrix solution and deposited directly onto a moving MALDI probe. ...

Journal: :Frontiers in Soft Matter 2022

Successive Self-nucleation and Annealing (SSA) is a thermal fractionation technique that performed by Differential Scanning Calorimetry (DSC). The combination of non-isothermal isothermal steps applied during SSA achieves efficient molecular segregation polymer crystallization. Such magnifies the effect defects in chain crystallization, thereby providing information on structure. was created im...

2014
Quentin G. Crowley Kyle Heron Nancy Riggs David Chew Brian McConnell Keith Benn

Zircon (ZrSiO4) is the most commonly used mineral in U–Pb geochronology. Although it has proven to be a robust chronometer, it can suffer from Pb-loss or elevated common Pb, both of which impede precision and accuracy of age determinations. Chemical abrasion of zircon involves thermal annealing followed by relatively low temperature partial dissolution in HF acid. It was specifically developed ...

Journal: :Journal of polymer science 2021

Although produced from simple monomers that contain just carbon and hydrogen, polyolefin have complex molecular structures are characterized by distributions in molar mass, chemical composition, branching. Accordingly, a variety of advanced analytical techniques needed for the comprehensive characterization heterogeneity polyolefins. These include different fractionation, spectroscopic, thermal...

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