Dynamic high pressure microfluidization experiments were
performed on laboratory scale microfluidizer M-100EH-30 (channel
diameter ¼ 75 mm) (Microfluidics Co., Newton, MA). The purified
IDF was dispersed in water to a solid to water ratio 1: 35 and
stirred gently at room temperature overnight, and treated under
the DHPM pressures of 80, 120 and 170 MPa for 3 passes, respectively,
the resultant modified sample (MIDF) was named IDF80,
IDF120 and IDF170 accordingly. 500 mL suspension was used for the
first pass, 400 mL for the second pass because initial 100 mL suspension of the first pass was discarded to eliminate the dilution
effect of water which was used between passes, 300 mL for the
third pass because of the same reason. The temperature of the
treated sample was 22e26 C because there was a machine cooling
system on the microfluidizer. Samples just dispersed but without
DHPM were taken as control (IDF). Each experimentwas done three
times in order to verify the repeatability of the DHPM process. Parts
of solutions were applied to particle size determination. Others
were collected and freeze-dried.
Dynamic high pressure microfluidization experiments wereperformed on laboratory scale microfluidizer M-100EH-30 (channeldiameter ¼ 75 mm) (Microfluidics Co., Newton, MA). The purifiedIDF was dispersed in water to a solid to water ratio 1: 35 andstirred gently at room temperature overnight, and treated underthe DHPM pressures of 80, 120 and 170 MPa for 3 passes, respectively,the resultant modified sample (MIDF) was named IDF80,IDF120 and IDF170 accordingly. 500 mL suspension was used for thefirst pass, 400 mL for the second pass because initial 100 mL suspension of the first pass was discarded to eliminate the dilutioneffect of water which was used between passes, 300 mL for thethird pass because of the same reason. The temperature of thetreated sample was 22e26 C because there was a machine coolingsystem on the microfluidizer. Samples just dispersed but withoutDHPM were taken as control (IDF). Each experimentwas done threetimes in order to verify the repeatability of the DHPM process. Partsof solutions were applied to particle size determination. Otherswere collected and freeze-dried.
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