• 한국축산식품학회지
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• 제40권1호
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• pp.11-20
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• 2020

The intent of this study was to scrutinize the consequence of salt type [sundried salt, refined salt, baked salt, or nitrate pickling salt (NP)] on the physicochemical and microbiological features of salami formulated by soaking with Aspergillus spp. before ripening. The effects of nitrate-free salts added were not significant. Nitrate pickling salt samples were significantly higher in protein level, whereas those were lower in fat level during ripening (p<0.05). The pH of salamis treated with NP was higher than that of other salt treatments, while weight losses of those was lower (p<0.05). During the ripening and drying, NP produced lower extent of volatile basic nitrogen and lipid oxidation than those with other salts (p<0.05). The total aerobic population counts of NP samples revealed lower than that of other samples over the ripening time. The addition of NP in salamis produced redder sausages. The salamis containing NP found to be better physicochemical and microbiological quality attributes than the other salt types.

• 식물조직배양학회지
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• 제27권1호
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• pp.31-37
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• 2000

인삼 (Panax ginseng C.A. Meyer)의 뿌리로부터 유도한 모상근의 proton 방출은 철이온의 결핍 또는 nitrate나 ammonium이온에 의해 증가되었다. 철이온 결핍에 의한 수소이온 방출의 증가는 정단 조직에서 나타나는 반면에 nitrate와 ammonium 이온에 의한 수소이온 방출은 기저부위에서 높게 나타났다. 배지의 pH변화에 따른 무기이온의 흡수는 무기이온의 종류에 따라 다양한 양상을 나타냈다. $Ca^{2＋}$, $Mg^{2＋}$ 그리고 Fe$^{2＋}$ 는 pH 4.8 에서 가장 높은 흡수를 나타냈으며, Mn$^{2＋}$, $Zn^{2＋}$ 그리고 Cu$^{2＋}$ 는 pH 3.8에서 가장 높았다. HPLC를 이용한 유리당 및 ginsenoside분석에서, 인삼모상근 유리당 구성의 주성분은 sucrose, glucose 그리고 fructose 였으며, glucose와 fructose는 pH 6.8에서 sucrose는 pH 4.8 에서 함량이 가장 높았다. 반면에 ginsenosides와 phenolic compound의 함량은 MS 배지의 표준인 pH 5.8 에서 가장 높았다. pH 변화에 대한 인삼모상근의 이러한 생리적 반응은 인삼근의 적변유발과 관련된 무기이온의 mobilization 및 흡수기작의 구명을 위한 모델 시스템으로 이용할 수 있는 가능성을 제시하였다.

• Bulletin of the Korean Chemical Society
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• 제35권10호
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• pp.2917-2921
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• 2014

Cerium-activated yttrium aluminate ($Y_3Al_5O_{12}:Ce^{3+}$) exhibiting a garnet structure has been widely utilized in the production of light emitting diodes (LEDs) as a yellow emitting phosphor. The commercialized yttrium aluminum garnet (YAG) phosphor is typically synthesized by a solid-state reaction, which produces irregular shape particles with a size of several tens of micrometers by using the top-down method. To control the shape and size of particles, which had been the primary disadvantage of top-down synthetic methods, we synthesized YAG:Ce nanoparticles with a diameter of 500 nm using a coprecipitation method under the atmospheric pressure without the use of template or special equipment. The precursor particles were formed by refluxing an aqueous solution of the nitrate salts of Y, Al, and Ce, urea, and polyvinylpyrrolidone (55 K) at $100^{\circ}C$ for 12 h. YAG:Ce nanoparticles were formed by the calcination of precursor particles at $1100^{\circ}C$ for 10 h under atmospheric conditions. The phase identification, microstructure, and photoluminescent properties of the products were evaluated by X-ray powder diffraction, scanning electron microscopy, absorption spectrum and photoluminescence analyses.