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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 82 for “"sieving"”.
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Stochastic analysis of particulate processes: a study of attrition, sieving and grinding
Call number: LD2668 .T4 1986 D83
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Reactive Sieving With M-Phenylene Ethynylene Foldamers: Effects of Structural Modification on Reactivity
… methylsulfonate esters used to study reactive sieving, a set of parameters for both the mPE foldamer and the methylsulfonate guests were developed for CHARMM-based molecular dynamics simulations. A total of 14 simulations were performed (500 ps each) and the dihedral angles of the guest alkyl …
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Separation of Fiber From Distillers Dried Grains With Solubles Using Sieving and Elutriation
… ""elusieve process""; two separation methods, sieving and elutriation (air flow), were used. DDGS samples were sieved into five sieve categories. The two smallest sieve categories comprised > 40% of the original DDGS weight and had lower fiber and higher protein and fat contents. An apparatus …
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Effects of plasma proteins on the sieving of macromolecular tracers in the kidney
… GCW have commonly been probed by measuring the sieving coefficients of a variety of tracers, both proteins and exogenous polymers, across the intact glomerular barrier and across isolated components of the GCW. It was found previously that the sieving coefficients of the tracers Ficoll and …
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Calibration, recognition, and shape from silhouettes of stones
… silhouette-based shape estimates with mechanical sieving demonstrates an application using the developed methods. A batch of 494 garnets is sieved 15 times. After each sieving, silhouette sets are captured for sub-batches in each bin. Batch matching is used to determine the IS sieve bins per …
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Protein enhancement of DDGS from conventional and enzymatic dry grind processes
… Protein concentrate, protein isolate and sieving processes were applied to increase DDGS protein and decrease fiber contents. For conventional DDGS, protein contents of protein concentrate, protein isolate and sieved products were 33, 37 and 40%, respectively, compared to conventional DDGS …
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Nanofluidic devices for rapid analysis of DNA and proteins
… have conducted theoretical studies of molecular sieving process in the context of periodic free-energy landscapes created by the patterned nanofluidic filter arrays. The kinetic model constructed based upon the equilibrium partitioning theory and the Kramers rate theory properly describes the …
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Distribution of gold in soils and stream sediments and the use of cyanidation in exploration geochemistry
… stream sediments were also collected. After wet sieving into four fractions between 2000 μm (10 mesh, ASTM) and 53 μm (270 mesh, ASTM) and separation of heavy minerals (S.G. 3.3), samples were analyzed for gold by fire assay-atomic absorption spectroscopy (FA-AAS) and cyanide-AAS (CN-AAS). …
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Design of chemistry and morphology of polymer filtration membranes
… This membrane can also perform molecular sieving, serve as a chromatography instrument, and isolate a product of a designated size distribution on a nanoscale via its tunability of channel sizes, as demonstrated in the uniform size dispersity of gold nanoparticles. Moreover, gold …
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The effects of scale and context-dependency on the outcome of experiments investigating soil carbon dynamics
… three experimental scales. Soil pre-treatment by sieving and air-drying dramatically altered soil properties compared to fresh soil. None of the measured soil properties recovered to fresh soil values during a 60-day microcosm experiment. Despite consistent overall trends in soil properties, the …
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Development of macroscopic nanoporous graphene membranes for gas separation
… sub-nanometer pores that enable molecular sieving while presenting low resistance to permeate flow. The feasibility of gas separation by graphene nanopores has been demonstrated experimentally on micron-scale areas of graphene. However, scaling up to macroscopic sizes presents significant …
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Gas Separation Using Nanoporous Single-Layer Graphene Membranes
… graphene contains a high density of gas sieving nanoscale pores, it can exhibit both a high gas permeance and a high selectivity, which is beneficial for reducing the cost of gas separation processes. However, significant challenges remain for matching theoretical predictions with …
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Polymer Aluminophosphate Mixed Matrix Membranes for Gas Separations
… theorized to increase selectivity by molecular sieving. A previous study performed in our laboratory showed an increase in He/CH4 selectivity when this aluminophosphate (8MR-AlPO) was dispersed in a fluorinated polyimide. The increase in selectivity was explained as size sieving by the …
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ΑΠΟΜΟΝΩΣΗ ΚΑΙ ΧΑΡΑΚΤΗΡΙΣΜΟΣ ΤΗΣ ΚΙΝΑΣΗΣ ΚΑΖΕΙΝΗΣ ΙΙ ΑΠΟ ΣΠΛΗΝΑ ΠΑΙΔΙΩΝ ΜΕ ΜΕΣΟΓΕΙΑΚΗ ΑΝΑΙΜΙΑ
… AMMONIUM SULFATE FRACTIONATION AND MOLECULAR SIEVING. THE PURIFIED ENZYME PHOSPHORYLATES IN PREFERENCE ACIDIC PROTEINS, CASEIN, USING ATP AND GTP AS PHOSPHATEDONORS, IN THE PRESENCE OF MGCL2. THE ENZYME IS CAMP AND CGMP INDEPENDENT, HAS A MOLECULAR WEIGHT OF 43.000 AND PI 71. IT IS INHIBITED …
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Analytic Computation of the Prime -Counting Function
… require much less memory than previously known sieving methods and which are much faster than methods which test primality of single numbers; (5) describe a new method for computing zeta(s) which gives more accurate values with less complexity than classical methods.
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The Characterization of Hemodialysis Membranes in Miniaturized Dialyzers
… internal filtration, water permeability, sieving coefficient (SC) and clearance of solutes, in the Medium Cut Off (MCO) and conventional High Flux (HF) miniaturized dialyzers. We found statistically significant differences between miniaturized MCO and conventional HF dialyzers with respect …
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Quantificação de coprólitos de minhocas nativas em latossolo amarelo cultivado com braquiárias na ausência e presença de adubação mineral
… aggregates (soil aggregates) want under dry sieving or under wet sieving.
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Adsorption Behavior of Volatile Organic Compounds in Metal -Organic Frameworks
… properties from the other MOFs. A molecular-sieving effect was observed preventing the adsorption of branched-alkanes, aromatics, and heavily halogenated compounds. Hydrogen-bonding interactions were found to be important for the adsorption of alcohols and amines. However, the adsorption of …
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Investigation of effect of geometry on performance of grit collection troughs
… employed was a 0.1mm sand fraction obtained by sieving and the width of the channel of the model grit chamber was 0.5 ft. Over a hundred experiments were performed which spanned a range of velocities of from 0.31 to 1.1 ft/sec and a range of depths of from 0.1 to 0.36 ft. The performance of the …
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