Soybean
oil deodorizer distillate (SODD) is well recognized as
a good source of both biodiesel and high-value bioactive compounds
of tocopherols, squalene, and phytosterols. To achieve a one-step
synthesis of biodiesel and recovery of bioactive compounds from SODD,
four commercial immobilized enzymes (Novozym 435, Lipozyme TLIM, Lipozyme
RMIM, and Lipozyme RM) and one self-prepared immobilized lipase MAS1-H108A
were compared. The results showed that immobilized lipase MAS1-H108A
due to the better methanol tolerance and higher catalytic activity
gave the highest biodiesel yield of 97.08% under the optimized conditions:
molar ratio of 1:2 (oil/methanol), temperature of 35 °C, and
enzyme loading of 35 U/g SODD, even after 10 persistent cycles without
significant decrease of activity. Simultaneously, there was no loss
of tocopherols and squalene in SODD during the enzymatic reaction.
Pure biodiesel (characterized by fourier transform infrared (FT-IR)
and nuclear magnetic resonance (NMR)) and a high concentration of
bioactive compounds could be successfully separated by molecular distillation
at 100 °C. In a word, this work provides an interesting idea
to achieve environmentally friendly treatment of SODD by combining
an enzymatic process and molecular distillation, and it is suitable
for industrial production.
Radio Frequency Identification (RFID) tag is one of the Automatic Identification technology, its application has been involved in all aspects of daily life. A new micro manufacturing technology called Aerosol Jet® printing is described to fabricate the RFID tag in this paper. The fabrication method of Aerosol Jet printing RFID tag is that print the line using sliver ink as the seed first, and then electroplate copper to increase the line width and thickness to reduce the resistance, thus it would get the higher quality factor Q. The width of seed lines printed is 60 μm with the tip of 250 μm in diameter. The inductance value of RFID tag printed is in the range of 2.87 μH to 2.97 μH, it meets the required value of 2 μH to 6 μH.
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