Effect of Fatty Acid Type on Dispersed Phase Particle Size Distributions in Emulsion Edible Films†

1998 ◽  
Vol 46 (11) ◽  
pp. 4534-4538 ◽  
Author(s):  
Craig P. Sherwin ◽  
David E. Smith ◽  
R. Gary Fulcher
Keyword(s):  
Particle Size ◽  
Fatty Acid ◽  
Phase Particle ◽  
Edible Films ◽  
Dispersed Phase ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Acid Type ◽  
Fatty Acid Type

Gas-phase particle size distributions and lead loss during spray pyrolysis of (Bi,Pb)–Sr–Ca–Cu–O

1995 ◽  
Vol 10 (7) ◽  
pp. 1644-1652 ◽  
Author(s):  
Abhijit S. Gurav ◽  
Toivo T. Kodas ◽  
Jorma Joutsensaari ◽  
Esko I. Kauppincn ◽  
Riitta Zilliacus
Keyword(s):  
Particle Size ◽  
Spray Pyrolysis ◽  
Gas Phase ◽  
Phase Particle ◽  
Average Particle Size ◽  
Particle Diameter ◽  
Processing Temperature ◽  
Average Particle ◽  
Size Distributions ◽  
Particle Size Distributions

Gas-phase particle size distributions and lead loss were measured during formation of (Bi,Pb)-Sr-Ca-Cu-O and pure PbO particles by spray pyrolysis at different temperatures. A differential mobility analyzer (DMA) in conjunction with a condensation particle counter (CPC) was used to monitor the gas-phase particle size distributions, and a Berner-type low-pressure impactor was used to obtain mass size distributions and size-classified samples for chemical analysis. For (Bi,Pb)-Sr-Ca-Cu-O, as the processing temperature was raised from 200 to 700 °C, the number average particle size decreased due to metal nitrate decomposition, intraparticle reactions forming mixed-metal oxides and particle densification. The geometric number mean particle diameter was 0.12 μm at 200 °C and reduced to 0.08 and 0.07 μm, respectively, at 700 and 900 °C. When the reactor temperature was raised from 700 and 800 °C to 900 °C, a large number (∼107 no./cm3) of new ultrafine particles were formed from PbO vapor released from the particles and the reactor walls. Particles made at temperatures up to 700 °C maintained their initial stoichiometry over the whole range of particle sizes monitorcd; however, those made at 800 °C and above were heavily depleted in lead in the size range 0.5–5.0 μm. The evaporative losses of lead oxide from (Bi,Pb)-Sr-Ca-Cu-O particles were compared with the losses from PbO particles to gain insight into the pathways involved in lead loss and the role of intraparticle processes in controlling it.

44 O 03 Gas-phase particle size distributions of (Bi,Pb)-Sr-Ca-Cu-O superconducting powders made via spray pyrolysis

1993 ◽  
Vol 24 ◽  
pp. S571-S572
Author(s):  
J. Joutsensaari ◽  
E.I. Kauppinen ◽  
J.K. Jokiniemi ◽  
A.S. Gurav ◽  
T.T. Kodas
Keyword(s):  
Particle Size ◽  
Spray Pyrolysis ◽  
Gas Phase ◽  
Phase Particle ◽  
Size Distributions ◽  
Particle Size Distributions

scholarly journals Improved Parameterization of Ice Particle Size Distributions Using Uncorrelated Mass Spectrum Parameters: Results from GCPEx

2019 ◽  
Vol 58 (8) ◽  
pp. 1657-1676 ◽  
Author(s):  
Paloma Borque ◽  
Kirstin J. Harnos ◽  
Stephen W. Nesbitt ◽  
Greg M. McFarquhar
Keyword(s):  
Particle Size ◽  
Phase Particle ◽  
Cold Season ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Microphysical Properties ◽  
Retrieval Algorithms ◽  
Mass Dimension ◽  
Selection Of ◽  
Ice Phase

AbstractSatellite retrieval algorithms and model microphysical parameterizations require guidance from observations to improve the representation of ice-phase microphysical quantities and processes. Here, a parameterization for ice-phase particle size distributions (PSDs) is developed using in situ measurements of cloud microphysical properties collected during the Global Precipitation Measurement (GPM) Cold-Season Precipitation Experiment (GCPEx). This parameterization takes advantage of the relation between the gamma-shape parameter μ and the mass-weighted mean diameter Dm of the ice-phase PSD sampled during GCPEx. The retrieval of effective reflectivity Ze and ice water content (IWC) from the reconstructed PSD using the μ–Dm relationship was tested with independent measurements of Ze and IWC and overall leads to a mean error of 8% in both variables. This represents an improvement when compared with errors using the Field et al. parameterization of 10% in IWC and 37% in Ze. Current radar precipitation retrieval algorithms from GPM assume that the PSD follows a gamma distribution with μ = 3. This assumption leads to a mean overestimation of 5% in the retrieved Ze, whereas applying the μ–Dm relationship found here reduces this bias to an overestimation of less than 1%. Proper selection of the a and b coefficients in the mass–dimension relationship is also of crucial importance for retrievals. An inappropriate selection of a and b, even from values observed in previous studies in similar environments and cloud types, can lead to more than 100% bias in IWC and Ze for the ice-phase particles analyzed here.

Gas-phase particle size distributions during vapor condensation of fullerenes

1994 ◽  
Vol 4 (5) ◽  
pp. 491-496 ◽  
Author(s):  
A.S. Gurav ◽  
T.T. Kodas ◽  
L.M. Wang ◽  
E.I. Kauppinen ◽  
J. Joutsensaari
Keyword(s):  
Particle Size ◽  
Gas Phase ◽  
Phase Particle ◽  
Vapor Condensation ◽  
Size Distributions ◽  
Particle Size Distributions

Film Formation of Latex Blends with Bimodal Particle Size Distributions:  Consideration of Particle Deformability and Continuity of the Dispersed Phase

2000 ◽  
Vol 33 (7) ◽  
pp. 2695-2708 ◽  
Author(s):  
A. Tzitzinou ◽  
J. L. Keddie ◽  
J. M. Geurts ◽  
A. C. I. A. Peters ◽  
R. Satguru
Keyword(s):  
Particle Size ◽  
Film Formation ◽  
Dispersed Phase ◽  
Size Distributions ◽  
Particle Size Distributions

254. A Comparison of the Particle Size Distributions for Aerosols Generated During Wet Grinding and Dry Deburring of Beryllium

1999 ◽  
Author(s):  
K.K. Ellis ◽  
R. Buchan ◽  
M. Hoover ◽  
J. Martyny ◽  
B. Bucher-Bartleson ◽  
...  
Keyword(s):  
Particle Size ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Wet Grinding

Measurements of Mineral Particle Size Distributions by a Buoyancy Weighing Method

2010 ◽  
Vol 126 (10/11) ◽  
pp. 577-582 ◽  
Author(s):  
Katsuhiko FURUKAWA ◽  
Yuichi OHIRA ◽  
Eiji OBATA ◽  
Yutaka YOSHIDA
Keyword(s):  
Particle Size ◽  
Mineral Particle ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Weighing Method
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