• Title/Summary/Keyword: TFMS

Search Result 6, Processing Time 0.034 seconds

A 20-GHz Miniaturized Ring Hybrid Circuit Using TFMS on Low-Resistivity Silicon

  • Lee Sang-No;Lee Joon-Ik;Yook Jong-Gwan;Kim Yong-Jun
    • KIEE International Transactions on Electrophysics and Applications
    • /
    • v.5C no.2
    • /
    • pp.76-80
    • /
    • 2005
  • In this paper, a miniaturized ring hybrid circuit is characterized based on a thin film microstrip (TFMS) on low-resistivity silicon. In order to obtain low-loss characteristics, a polyimide layer with 50 $\mu$m thickness is spin-coated onto the silicon to be used for the substrate. First, propagation characteristics of TFMS lines consisting of the ring hybrid circuit are presented. Then, a ring hybrid circuit based on TFMS is featured by employing the triple concentric circle approach for miniaturization. Triple concentric circle lines with $\lambda$$_{g}$/4 or 3$\lambda$$_{g}$/4 line lengths are implemented on the surface of the polyimide by circularly meandering to reduce the circuit size of the designed ring hybrid. Good agreement between measured and simulated results is obtained.

Development and Characterization of Trans Free Margarine Stock from Lipase-Catalyzed Interesterification of Avocado and Palm Oils (팜유와 아보카도유로부터 효소적 interesterification을 통한 trans free margarine stock 제조 및 이화학적 특성 연구)

  • Lee, Yun-Jeung;Lee, Ki-Teak
    • Korean Journal of Food Science and Technology
    • /
    • v.41 no.3
    • /
    • pp.231-237
    • /
    • 2009
  • Trans free margarine stock (TFMS) was produced by lipase-catalyzed synthesis of fully hydrogenated soybean oil (FHSBO), avocado oil (AO) and palm oil (PO). A blend of FHSBO, AO, and PO with a 1:5:4 (30:150:120 g, respectively) ratio was interesterified with lipozyme RM IM(from Rhizomucor miehei) in a 1 L-batch type reactor at 65 for 12 hr, and the physicochemical and melting properties of TFMS were compared with commercial margarine. The solid fat content (%) of the TFMS was analyzed at 25, 30, and $35^{\circ}C$, respectively, while its melting point was $37.8^{\circ}C$. The trans fatty acid content of the TFMS was below 0.1%. It also had acid, saponification, and iodine values of 0.4, 173.9, and 58.6, respectively. In HPLC chromatograms of the TFMS, newly synthesized peaks of triacylglycerol molecules were observed by using reverse-phase HPLC with evaporative light-scattering detection. Normal-phase HPLC with UV detection was used to quantify tocopherols in the TFMS, indicating that its ${\alpha}-$, ${\gamma}-$ and ${\delta}$-tocopherol contents were 5.7, 2.1, and 1.7 mg/100 g, respectively.

High-Performance Q-Band MMIC Phase Shifters Using InGaAs PIN Diodes

  • Kim, Mun-Ho;Yang, Jung-Gil;Yang, Kyoung-Hoon
    • Journal of electromagnetic engineering and science
    • /
    • v.9 no.3
    • /
    • pp.159-163
    • /
    • 2009
  • This paper presents the design and implementation of Q-band MMIC phase shifters using InGaAs PIN diodes. The topology using a thin-film microstrip line(TFMS) has been proposed to achieve the desired phase-shift as well as good loss characteristics. Five single-bit MMIC phase shifters have been implemented by using a developed BCB(benzocyclobutene)-based multi-layer fabrication technology. The developed phase shifters have less than 3.4 dB of insertion loss and better than 11 dB of input and output return loss in the frequency range of 43 to 47 GHz. To the authors' knowledge, this is the first demonstration of high-performance InGaAs PIN diode-based MMIC phase shifters operating at Q-band frequencies.

The Allergenicity of Ovomucoid in Treated Egg Whites to Human IgE Antibody from Egg-Allergic Patients (계란 알레르기 환자의 IgE 항체를 이용한 처리 난백 중 ovomucoid의 알레르기성 조사)

  • Ryu, Ju-Hyeon;Kim, Hyeon-Jeong;An, Gang-Mo;Lee, Sang-Il;Son, Dong-Hwa
    • Korean Journal of Food Science and Technology
    • /
    • v.40 no.3
    • /
    • pp.343-348
    • /
    • 2008
  • The ovomucoid (OM) of egg whites is recognized as a major allergen. Here, the allergenicity of OM in egg whites (EW) treated by chemical, enzymatic, and physiological methods were investigated by competitive inhibitory ELISA using human IgE antibody acquired from egg-allergic patients. Enzymatic hydrolysis, irradiation, and succinic anhydride treatments did not reduce the allergenicity of the OM effectively. Allergenicity was reduced to only 1/20 by deglycosylation with trifluoromethanesulfonic acid (TFMS). Heat treatment of the OM at $121^{\circ}C$ for 10 min reduced allergenicity to 1/100. Furthermore, NaOH (over 3%) treatment reduced allergenicity to 1/10,000, and the combinatory treatment of NaOH (over 0.3%) and heat ($70^{\circ}C$, 15 min) reduced it to less than 1/10,000, which was the most effective method. In this study, which analyzed treated EW using ELISA and patient-derived IgE, the OM allergenicity was nearly the same as its antigenicity according to ELISA using rabbit IgG. However, in the case of the TFMS-treated EW, the antigenicity was much lower than the allergenicity. These results suggest that the allergenicity of OM is slightly different from its antigenicity.

Changes in the Antigenicity of Chicken Egg White by the Treatments of Protease, Trifluoromethanesulfonic Acid, Heat, and NaOH (효소, Trifluoromethanesulfonic Acid, 열, 및 NaOH 처리에 의한 계란 난백의 항원성 변화)

  • Ryu, Ju-Hyune;Lee, Jong-Mee;Shon, Dong-Hwa
    • Korean Journal of Food Science and Technology
    • /
    • v.32 no.3
    • /
    • pp.720-725
    • /
    • 2000
  • To reduce the antigenicity of egg white (EW), EW was treated with several proteolytic enzymes, trifluoromethanesulfonic acid (TFMS), heat, and NaOH. Competitive indirect enzyme-linked immunosorbent assay (ciELISA), using rabbit anti-EW antibody, was performed to examine the antigenicity of the treated EW's. Enzymatic hydrolysis gave no good effect on the reduction of the antigenicity of EW. Neither did the pretreatment with ${\gamma}-irradiation$ before the hydrolysis reduce the antigenicity. TFMS treatment removed the antigenicity of EW. The antigenicity of EW heated at $120^{\circ}C$ for 30 min or treated with NaOH at 0.3% (w/v) and more, decreased to less than 1/10,000 as compared with that of native EW. The combinatory treatment with NaOH, followed by heat at $70^{\circ}C$ for 15 min had a synergic effect on the reduction of the antigenicity of EW.

  • PDF

Influence of Concentric Saddle Shaped Coils on the Behavior of a Permanent Magnet Transverse Flux Machine with Segmented Construction

  • Baserrah, Salwa;Rixen, Keno;Orlik, Bernd
    • Journal of Magnetics
    • /
    • v.17 no.2
    • /
    • pp.100-108
    • /
    • 2012
  • Flux concentrated permanent magnet transverse flux machines, FCPM-TFMs, with segmented stators require multi-turn concentric saddle coils to replace the ring coils, which are normally utilized in conventional layeredphase TFM constructions. In this paper, we investigate the influence of the shape of saddle phase windings and their parameter variations on the output torque productivity. Non-meshed coils evaluated via a finite element method (FEM) to examine the effect of the coil's location within one phase on machine performance. By using meshed coils, the analysis can be extended to inspect the distributions of magnetic field strength as well as current density in the coils. Throughout the study, the influence of design parameters on the output torque for two stator structures, i.e., a laminated and soft magnetic composite (SMC), are evaluated.