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Lysozyme 및 sodium ultraphosphate 의 첨가가 프레스 햄의 저장성에 미치는 영향
김영붕(Y . B . Kim),이성기(S . K . Lee),김경환(K . H . Kim),유익종(I . J . Yoo) 한국축산학회 1991 한국축산학회지 Vol.33 No.2
This study was carried out to investigate the effects of the addition 100ppm of lysozyme and 0.2% of sodium ultraphosphate on the shelf-life of press ham, compared with the addition 0.15% of K-sorbate during the storage at 25℃. Addition of combined lysozyme and sodium ultraphosphate inhibited microbial growth more effectively than addition of K-sorbate, lysozyme and sodium ultraphosphate, individually. pH value was not changed by the additives and storage times. VBN value was less increase in addition of combined lysozyme and sodium ultraphosphate than in control at 10days storage. Rheological changes was not differed by the additives although springiness was decreased by the storage times. Color was not differed by the additives and storage times. As results above, addition of combined lysozyme and sodium ultraphosphate extended the shelf-life of press ham compared with control, and was not differed compared with K-sorbate except for microbiological aspect.
UHF 대역 RFID 리더 응용을 위한 주파수합성기 설계
김경환(K. H. Kim),오근창(K. C. Oh),박동삼(D. S. Park),유종근(C. G. Yu) 대한전기학회 2007 대한전기학회 학술대회 논문집 Vol.2007 No.10
This paper presents a 900㎒ fractional-N frequency synthesizer for radio frequency identification (RFID) reader using 0.18㎛ standard CMOS process. The IC meets the EPC Class-1 Generation-2 and ISO-18000 Type-C standards. To minimize VCO pulling, the 900㎒ VCO is generated by a 1.8㎓ VCO followed by a frequency divider. The settling time of the synthesizer is less than 20㎛. The frequency synthesizer achieves the phase noise of -105.6㏈c/㎐ at 200㎑ offset. The frequency synthesizer occupies an area of 1.8 × 0.99㎟, and dissipates 8㎃ from a low supply voltage of 1.8V.