• Journal of Food Hygiene and Safety
• /
• v.18 no.2
• /
• pp.73-78
• /
• 2003

This study was to investigate interaction between ionization rate and absorption rate of calcium(Ca) in each feeding Ca sources in rats. The results were as follows. 1. The ionized Ca ions 134 into rats were absorbed in about two hours while Ca from other sources like powdered egg-shell Ca or precipitable Ca carbonate caused more than five hours to be absorbed. This means that the ionization of Ca is essential for the fast absorption in rat. 2. Absorption rate were increased in the rank order to brown rice vinegar-Ca acetate > brewed vinegar-Ca acetate > precipitated Ca carbonate > egg-shell Ca powder by feeding sources in rat and absorption rate of brown rice vinegar Ca was appeared 4 times highly than egg-shell Ca powder. 3. Absorption rate of brewed vinegar Ca acetate were appeared excellent, 1.4 times highly in case of the brewed vinegar at no ventilation condition than ventilation condition. 4. Ca concentration in blood serum was significantly enhanced the increased ionization rate of Ca in the above experiment rat models regardless of dietary Ca levels.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.31 no.2
• /
• pp.236-240
• /
• 2002

Characteristics of ostrich egg shell and optimal ashing conditions for preparation of calcium lactate were investigated. Average weight, girth, and length of ostrich egg shell with membrane (OESM) were 255.17 g, 39.50 cm, and 15.20 cm, respectively. Ostrich egg shell without membrane (OES) contained 0.35% moisture, 40.98% Ca as a maior mineral, 2.43% protein, and 235.0 mg/100 g of amino acids. Optimal ashing times for preparation of white-colored ashing powder from OES were 12 hr at $700^{\circ}C$, 80 min at 80$0^{\circ}C$, and 15 min at 90$0^{\circ}C$, respectively. These ashing conditions resulted in ashing powder with yields of 54.5~54.6% and color values of 97.26 ~97.51 for $L^{*}$, -0.30~-0.34 for $a^{*}$, and 0.63~0.98 for $b^{*}$. Ashing powders, from three different particle size ranges of OES, did not show significant differences in yield.eld.d.

• The Journal of Korean Academy of Prosthodontics
• /
• v.22 no.1
• /
• pp.33-50
• /
• 1984

The purpose of this study was to investigate whether the ashed tooth powder is utilized as an alternative material of the implant to recovery the bony defect. For this purpose its biocompatibility was evaluated comparing to the synthetic calcium phosphate compounds, such as Syntograft and Calcitite, as well as the vacuum firing porcelain (Ceramco Inc.) which is anticipated to use as a matrix to aid sintering. Bony defects to exposure the bone marrow, $3{\times}5$ mm in size, were created in the right and left tibias of fifteen rabbits, and then the ashed tooth powder at $950^{\circ}C$, the porcelain powder, Syhtograft and Calcitite were inserted in the defects of twelve rabbits of the experimental group and the blood clot only was filled in the defects of three rabbits of the control group. The experimental and control rabbits were sacrificed at 1st, 2nd 3rd week after implantation and the histologic examination was performed. The ashed tooth powder in order to make the needed form of the implant was molded using the cylindrical mold 1 cm high, 1 cm in diameter under the pressure of $1000kg/cm^2$ and the ashed tooth powder was sintered at $1100^{\circ}C$ for 1 hour and the mixture of the porcelain powder and the ashed tooth powder at the weight ratio of 7:3, 6:4, 5:5, 4:6 were molded in the same manner and were sintered at $925^{\circ}C$. From this sintered material, square shaped implants were prepared in the dimension of $2{\times}4{\times}6mm$. The prepared implants were surgically placed in the subperiosteum of lateral surfaces of the right and left mandibular bodies. The dogs were sacrificed at 4 weeks, and then the specimens were examined using the light and scanning electron microscopes. The results of this study were obtained as follows: 1. Any inflammatory response was not noted after implanting of the ashed tooth powder, Syntograft, Calcitite and the porcelain powder during the whole experimental period after implantation. 2. Induction of the new bone formation was significantly shown in the ashed tooth powder, Syntograft and Calcitite. 3. The more the porcelain powder was contained in the implants, the more the porosity was and the bigger the pore size was under the scanning electron microscope. And there was ingrowing of the fibrous connective and the osteoid tissue. 4. The osteoid tissues were found to be directly fused to the implant of the ashed tooth powder, and the mixture implant of the porcelain powder and the ashed tooth powder at the weight ratio of 4:6 under the light and scanning electron microscopes.

• Journal of the Korean Society of Food Culture
• /
• v.20 no.4
• /
• pp.416-420
• /
• 2005

This study was carried out to make functional laver added with sericulture powder which have a effect of prevention adult diseases such as diabetes mellitus, hypertention, and obesity. In our lab. a lot of study have been performed about functional effect of sericulture(mulberry leaf, silkpeptide and silkworm) for examples decrease of serum cholesterol, triacylglyceride and control of serum glucose in rat. sericulture powder was prepared by pulverizing freeze-dried. Functional laver samples were prepared, and the sensory evaluation quality, physical characteristics and mineral contents of those were compared. In case of overal quality of sensory evaluation, silkpeptide powder laver was lower than other samples. The content of moisture of functional laver added with sericulture powder samples(control, sample 1, 2, 3) were 0.30, 0.98, 0.24 and 0.28%, respectively. The content of crude protein of functional laver added with sericulture powder samples were 40.50, 44.10, 56.75, and 62.50%, respectively. The content of crude fat of functional laver added with sericulture powder samples were 4.00, 4.10, 4.00 and 4.40%, respectively. The content of ash of functional Laver added with sericulture powder samples were 7.07, 7.53, 7.60 and 7.27%, respectively. The content of calcium of functional laver added with sericulture powder samples were 219, 253, 224 and 229mg/100g, respectively. The content of potassium of functional laver added with sericulture powder samples were 1879, 1919, 1890 and 1907mg/l00g, respectively. The content of iron of functional laver added with sericulture powder samples were 18.03, 18.23, 18.46 and 18.53mg/100g, respectively. The content of zinc of functional laver added with sericulture powder samples were 1.86, 4.47, 4.57 and 5.64mg/100g, respectively. The content of manganese of functional laver added with sericulture powder samples were 4.50, 8.50, 7.00 and 6.00 mg/100g, respectively. It was concluded that this functional laver added with sericulture powder is low calorie, high protein and high mineral health food which have a preventive effect of adult disease.

• Food Science of Animal Resources
• /
• v.36 no.3
• /
• pp.397-404
• /
• 2016

The objective of this study was to determine the effect of dietary supplementation with whey powder (WP, 1g/kg feed) from weaning to slaughter (150 d) on dry-aged loin quality of pigs. Fifty-eight pigs were randomly divided into two dietary treatment groups (seven replications of four pigs per treatments). Basal diet with 0.1% whey powder was supplied to the WP group. Basal diet was used for the control group (CON). Diet whey protein did not appear to influence the moisture or protein contents. However, ash and fat contents were significantly (p<0.05) decreased in the WP group compared to the control group. Drip loss was significantly (p<0.05) lower in the WP group than that of the control group. Increasing redness with decreasing lightness was found in the inner loin of the WP group. Calcium and iron contents in the WP group were significantly higher than those in the control group. Protein degradation was higher in the WP group than that in the control group (p<0.05), whereas shear force was lower in the WP group than that in the control group (p<0.05). In conclusion, the basal diet supplemented with 0.1% whey powder influence negatively the lipid oxidation of meat whereas the texture property and mineral composition of meat from whey powder fed pigs are developed.

• Journal of Korea Technical Association of The Pulp and Paper Industry
• /
• v.46 no.1
• /
• pp.39-45
• /
• 2014

Various approaches have been tried to reduce the emission of carbon dioxide in paper industry. One of important approaches is to use PCC manufactured from emission gas as a filler. However, it was recognized that PCC is inferior to other fillers in the paper strength properties of view. Therefore, pretreatment of PCC with pulp powder was tried to mitigate the strength reduction of paper. Pretreatment of PCC with pulp powder improved the bulk(7.4~12.9%) and air permeability(24.8~42.98%), but there is no significant change in opacity. Tensile index, burst index and stiffness were decreased by the use of pretreated PCC with pulp powder. Anionic and cationic PAM were used as a additive for PCC pretreatment in order to improve strength properties. There was no significant change in bulk in all kinds of PAM used in this study. Most strength properties were improved by the pretreatment of PCC with the anionic and cationic PAM and pulp powder, although the opacity and stiffness were more or less decreased.

• Journal of Powder Materials
• /
• v.20 no.3
• /
• pp.197-202
• /
• 2013

A novel route to prepare Nd-Fe-B magnetic particles by utilizing both spray drying and reduction/diffusion processes was investigated in this study. Precursors were prepared by spray drying method using the aqueous solutions containing Nd salt, Fe salt and boric acid with stoichiometric ratios. Precursor particles could be obtained with various sizes from 2 to $10{\mu}m$ by controlling concentrations of the solutions and the average size of $2{\mu}m$ of precursors were selected for further steps. After heat treatment of precursors in air, Nd and Fe oxides were formed through desalting procedure, followed by reduction processes in Hydrogen ($H_2$) atmosphere and with Calcium (Ca) granules in Argon (Ar) successively. Moreover, diffusion between Nd and Fe occurred during Ca reduction and $Nd_2Fe_{14}B$ particles were formed. With Ca amount added to particles after $H_2$ reduction, intrinsic coercivity was changed from 1 to 10 kOe. In order to remove and leach CaO and residual Ca, de-ionized water and dilute acid were used. Acidic solutions were more effective to eliminate impurities, but Fe and Nd were dissolved out from the particles. Finally, $Nd_2Fe_{14}B$ magnetic particles were synthesized after washing in de-ionized water with a mean size of $2{\mu}m$ and their maximum energy product showed 9.23 MGOe.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.18 no.8
• /
• pp.338-343
• /
• 2017

In this study, blast furnace slag powder was used in concrete to help reduce carbon dioxide emissions and to recycle industrial waste. Blast furnace slag powder is a byproduct of smelting pig iron and is obtained by rapidly cooling molten high-temperature blast furnace slag. The powder has been used as an admixture for cement and concrete because of its high reactivity. Using fine blast furnace slag powders in concrete can reduce hydration heat, suppress temperature increases, improve long-term strength, improve durability by increasing watertightness, and inhibit corrosion of reinforcing bars by limiting chloride ion penetration. However, it has not been used much due to its low compressive strength at an early age. Therefore, this study evaluates the effects of steam curing for increasing the initial strength development of concrete made using slag powder. The relationship between compressive strength, SEM observations, and XRD measurements was also investigated. The concrete made with 30% powder showed the best performance. The steam curing seems to affect the compressive strength by destroying the coating on the powder and by producing hydrates such as ettringite and Calcium-Silicate-Hydrate gel.

• Journal of Nutrition and Health
• /
• v.30 no.3
• /
• pp.244-251
• /
• 1997

The effects of Artemisia princeps var orientalis(mugwort), Circium japonicum var ussuriense (Unggungqui) on cadiovascular system in hyperlipidemic rats were investgated. Thirty rats devided into 5 experimental groups, were fed with the diet contained 1% chlesterol, 0.25% sodium cholate, 10% coconut oil and 5% lard by the same method of previous paper1). Contractile and relaxation responses in the isolated artria and thoracic aortae were measured and the morphological changes of the aortic endotherium from the rats were inspected. The responses of the right atrial to isoproterenol were significantly lower value in Ungungqui powder diet group(UP) and mugwort powder diet group(MP) than the control. The contraction force by injectin of phenylephrine and calcium in isolated thoracic aortae was significantly low value in the UP and the MP groups compaired to the control. The relaxation rate by acetylcholine in isolated thoracic aortae represented significantly higher value in UP than control. The morphological changes of endothelial cell suface was smallest in UP and the damage of endothelium by retarded in MP. Although Ungungqui and mugwort extract diet groups(UE, ME) were advanced, those were less than control.

• The Korean Journal of Ceramics
• /
• v.1 no.3
• /
• pp.131-136
• /
• 1995

It has been reported that the biocement obtained by mixing $CaO-SiO_2-P_2O_5$ glass powders with ammonium phosphate solution has biocompatibility as will as high strength. The hardening mechanism and hydroxyapatite forming mechanism were discussed when $53.6%CaO_1,\; 38.1%SiO_2,\; 7.7P_2O_6,\; 0.6%CaF_2$(mole %) glass powder was reacted with ammonium phosphate solution and reacted in tris-buffer solution, respectively. High strength hardened biocement was obtained for the specimen with $CaNH_4PO_4\;H_2O$ crystal when the glass powder was mixed with ammonium phosphate solution, and hydroxyapatite crystal was rapidly formed only in the sample with $CaNH_4PO_4\;H_2O$ crystal when it was reacted in tris-buffer solution.