• 한국식생활문화학회지
• /
• 제27권6호
• /
• pp.719-729
• /
• 2012

We sought to study the qualities and scientific benefits of Dongchimi, a traditional Korean food. We compared and analyzed ingredients used for the appearance and storability of dongchimi - honggot (Brassica juncea czerniak et coss), cockscomb (Celosia cristata L.), and beet Beta vulgaris L.). We specifically examined the antioxidative and antibacterial activity of pigments from extracts of these ingredients. Distilled water ($H_2O$) and 1% citric acid were used to safely extract pigments. The antioxidative activity of the pigments was then measured for total phenolic compounds, SOD (Super Oxide Dismutase), and EDA (Electron Donation Ability) by DPPH. The antibacterial activity of was also assessed by a Paper disc solution. Our results show that the pigments had sufficient antioxidative activity and had antibacterial properties against Gram positive and negative bacteria. In particular, Cockscomb (used for enhancing color) contained the highest amount of polyphenol compounds and had the most efficient antioxidative activity.

• 펄프종이기술
• /
• 제33권1호
• /
• pp.53-61
• /
• 2001

This study was carried out to evaluate the effect of coating pigments on the printability by investigating the pore structure of casting layer such as the number, size and distribution of pores and the pore rate. The coating structure was mainly determined by the interaction between pigment and binder. It means that the structure of pores was chiefly affected by the shape and size distribution of pigments and their packing rate. The physical properties of pore have close relationships with ink set-off, the speed of ink penetration and printing gloss. The results suggested that the rate and number of pores were greatly affected by the particle size distribution and shape of pigments. The rate of pore increased with the reduction of particle size distribution of pigments. Calcite was effective to improve greatly the printability of coated paper.

• 한국염색가공학회지
• /
• 제10권6호
• /
• pp.27-32
• /
• 1998

도시 Traditionally, dyes extracted from onion shells have been used as natural pigments but dyeing methods with reproducibility have not been developed. In this study, the dyes were analyzed by high performance thin layer chromatography(HPTLC) to obtain the ratio of pigments in water and ethyl acetate extract. Furthermore, the present study was also carried out to obtain the information characteristic of wavelength which proportionally decrease for continuous dyeing reaction. Scanning of water extract showed 4 peaks by the mobile phase of benzene/ethyl acetate/acetic acid(40/10/5) and the peak 1 exhibited yellow color with the maximal absorption spectra of 306nm and 309nm while ethyl acetate extract showed 9 peaks in the same mobile phase. The water extract after ethyl acetate extraction was adjusted to 0.5 of O.D.(optical density) at 550nm by adding of water and compared wavelength of the pigments from 200 to 600nm to find the proportional decrease of wavelength. As the result, it showed that wavelength of 306nm could be the standard of dyeing monitoring points.

• 세라미스트
• /
• 제22권3호
• /
• pp.256-268
• /
• 2019

Ceramic nano pigments have attracted much interest owing to recent demand for nontoxic, heavy metal-free pigments. In general, ceramic pigments must possess thermal stability at high temperature, however nanosized powder easily undergoes aggregation at high temperature, and its color turns. serveral groups have focused on to minimize agglomeration and oxidation, a core-shell structure with a silica coating is suggested. In this review, we introduce the reported the trend of nano-ceramic powders and we summarized method improve color and physical properties throuth morphology control and ceramic coating technology.

• ALGAE
• /
• 제22권2호
• /
• pp.125-129
• /
• 2007

Conventional methods for the isolation and purification of mRNA from Zygnema were unsuccessful because of its high amount of pigments and RNA interactive molecules. In particular, pigments were difficult to remove using conventional protocols because they interacted with RNA during pulverization of the materials. This resulted in total degeneration of RNA in two to three hours. To alleviate this problem, we developed an isolation method that utilized DEAE-cellulose resin. The pigments bound to DEAE anion exchange resin and separated from the RNA. Purified total RNA showed an yield of 50 μg per 100 mg of tissue with this method. The amplified 2nd strand cDNA was distributed 300 bp and over.

• 한국세라믹학회지
• /
• 제48권2호
• /
• pp.178-182
• /
• 2011

The Rutile - type brown pigments doped with chromium were synthesized. Samples of $Ti_{1-x}Cr_xO_2$ ($0.02{\leq}X{\leq}0.08$) were synthesized by the solid state method. Solid solution limit of Cr contents to the rutile structure and its coloration were studied. Optimum composition was investigated accordingly. The characteristics of synthesized pigments were analyzed by XRD, SEM, Raman spectroscopy and UV. As a result, single phase of Rutile was observed from $1000^{\circ}C$ by XRD. The maximum limit of solid solution was 0.06 mole $Cr_2O_3$. The glazed sample showed brown color, and the value of CIE $L^*a^*b^*$ was $L^*$ 33.27, $a^*$ 10.64, $b^*$ 20.84.

• 한국세라믹학회지
• /
• 제46권4호
• /
• pp.397-404
• /
• 2009

Using rice husk ash as silica, the influence of the firing temperature and holding time on the color intensity of Pr-$ZrSiO_4$ pigments were investigated. The Pr-yellow pigments were calcined at 500, 700, 800, 900, 950, 1000, $1100^{\circ}C$ in a ceramic method. The synthesized pigments were characterized by DT-TG thermal analysis, X-ray diffraction, UV-Vis spectroscopy, and SEMEDAX analysis. The relationship between the zircon phase-formation growth and Pr-yellow color development was evaluated and the optimum firing conditions were determined. The color of the pigment samples was characterized on the grounds of the Commission Internationale de l'Eclairage (CIE) standard procedure (CIE $L^*a^*b^*$ measurement) after an application on the bisque ceramic tile.

• 한국응용과학기술학회지
• /
• 제11권2호
• /
• pp.7-15
• /
• 1994

As raw materials, the inorganic pigments, such as mica, talc and some metal oxides were mainly used in Make-Up cosmetics. Some other polymerics, organics and functional pigments were also used to cope with the various consumer's demends. Recently, excellent sliding, adhensivness, coverture and UV cutting properties were strongly required in Make-Up cosmetics. According to these demends, it needs to understand the functional properties of each pigment and consider the proper use for some purpose. And so, this report introduce the properties of inorganics, polymerics and functional pigments and their application fields for Make-Up cosmetics.

• Biotechnology and Bioprocess Engineering:BBE
• /
• 제7권1호
• /
• pp.21-25
• /
• 2002

To maximize and sustain the productivity of Monascus pigments, various environmental and nutritional parameters, such as the initial moisture content, pH, inoculum size, sample size, and nutrient supplement, that influence pigment production were evaluated in solid-state cultures as follows: initial moisture content, $50\%;$ pH, 6.0; inoculum size $1\;\times\;10^4$ spore cells $(grams\;of\;dry\;solid\;substrate)^{-1};$ sample size, 300 g. All supplementary nutrients (carbon, nitrogen, and mineral sources) added has inhibitory effects on the cell growth and red pigment production. In open tray culture the maximum biomass yield and specific productivity of red pigments were 223 mg DCW $(grams\;of\;initial\;dry\;substrate)^{-1}$ and, $47.6\;OD_{500}\;(DCW\;grams)^{-1}h^h{-1}$ respectively.

• Applied Microscopy
• /
• 제28권4호
• /
• pp.503-512
• /
• 1998

Fine structure of the cutaneous pigments in the black widow spider, Latrodectus mactans are studied with light and electron microscopes. The cutaneous pigments are only observed in epidermal layer just beneath the cuticle. These pigments are compactly distributed around the spinnerets which located at caudal area of the abdomen. According to the fine structural characteristics of the pigment granules, two main types of guanine pigment granules-carotenoid vesicles and reflecting platelets - are observed in the cytoplasm of the epidermal cells. Morphological features of these pigment granules are characterized as the electron dense carotenoid vesicles and the electron lucent reflecting platelets. Marginal electron density of the carotenoid vesicle is different from that of internal region, whereas the reflecting platelets have laminated crystalline granules. Typiral structures of these pigment granules are very similar to those of invertebrate's chromatophores, especially erythrophores and iridophores. Moreover differentiation of these pigment granules are also originated from the small vesicles of Golgi complexes similarly to those of cutaneous chromatophores.