This study investigated the changes in textural characteristics that occurred by adding maltose syrup, dextrin, and sucrose to whole egg gels, by assessing coagulation after cooling. It also examined the optimal NaCl and sucrose concentrations for whole egg gels sensory evaluations, and then studied how the addition of sucrose effected gel formation and textural characteristics under optimal NaCl concentration. The additions of maltose syrup, dextrin, and sucrose, presented some color changes. The greater the addition of maltose syrup or dextrin, the lower the L, a, and b values of the whole egg gel and whole egg liquid, and ultimately the color turned dark bluish green. With increasing additions of sucrose, maltose syrup, and dextrin, the viscosity of the whole egg liquid increased slightly. In terms of the mechanical texture characteristic of the gel, the texture was most elastic with the 0.8% addition of sucrose, and hardness decreased by increasing the ratio of added sucrose. Increasing amounts of maltose syrup resulted in less hardness and SF. And for dextrin, the SF increased up to 2.5 and then decreased, and hardness decreased with increasing amounts of dextrin. Based on sensory evaluations, the 0.8% addition of NaCl was significantly preferred(p<0.05), in terms of salty taste. The overall preference scores indicated that the whole egg gel made with 0.3% sucrose and the optimal NaCl concentration(0.8%) was most preferred, and each sample was significant(p<0.05). Under the optimal 0.8% NaCl concentration increasing the sucrose concentration resulted in a darker egg gel color, in terms the L value. SF, NF, and hardness, which are mechanical texture parameters, were when 0.8% sucrose and the optimal NaCl concentration of 0.8% were added to whole egg liquid, in preparing the whole egg gel.
Journal of the Korean Institute of Landscape Architecture
/
v.44
no.6
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pp.98-106
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2016
This paper has attempted to reexamine current international circumstance and the meaning of regionality and discover the practical design strategy in the process of observing the trend of contemporary landscape architecture from the perspective of regionality. Contemporary landscape architecture has started to discover possibility in the local value and create identity. This tendency can be classified as follows: First, regionality is re-examined as a medium which can integrate nature, culture and city. As a concept which contains time and spatial continuity, landscape is a matter of the identity of land and area. Second, regionality has been reinterpreted and recreated by designers. Landscape designers attempt to restore the past memories and traces instead of adding a new concept after erasing previous physical features. This design attitude has spatialized time continuity. Third, site is seen as a palimpsest, not tabula rasa in contemporary landscape architecture. It has been attempted to visually materialize the natural and ecological processes and spatial features. Fourth, site is approached in a tectonic approach instead of analytical approach. It is attempted to organize and restore the geological and archeological memories and ecological processes. Differentiation has emerged as a critical design strategy in contemporary landscape architecture. However, regionality is also formed through an interaction with continuity as well as through differentiation. In this sense, the following possibilities can be reviewed as practical design strategies to realize regionality: First, a terra-tectonic approach discovers and selects possibility in the site and expresses the site, creating practical possibility which strengthens regionality. If the memory and conditions of the site are different, the identity would different as well. Second, continuity of region itself is a gene pool with comparative advantage. As a rough sketch of design, it acts as a loose conformity on designers' experience and practice. Of course, this approach is not absolute with some limitations. It is necessary to explore practical strategies.
Aluminium sulfate solution was prepared by sulfuric acid treatment from gibbsite. Aluminium sulfate hydrate [$Al_2(SO_4)_3$ · $nH_2O$] was precipitated from aluminium sulfate solution by adding it into ethylalcohol. From XRD analysis as-prepared $Al_2(SO_4)_3$ · $nH_2O$ was confirmed to have mixed-crystalization water(n=18, 16, 12, 6). The average water of crystalization calculated from thermogravimetry(TG) was 14.7. Aluminium sulfate hydrate [$Al_2(SO_4)_3$ · $nH_2O$] was thermally decomposed and converted to $Al_2(SO_4)_3$ at $800^{\circ}C$, $\gamma-Al_2O_3$ at $900-1000^{\circ}C$, and $\alpha-Al_2O_3$ at $1200^{\circ}C$. Ni-doped $\gamma-Al_2O_3$, was synthesized from the slurry of as-prepared $\gamma-Al_2O_3$, with the ratio of [Ni]/[Al]=0.5. The reaction conditions of synthesis were determined as initial pH 9.0 and temperature $80^{\circ}C$ The basicity(pH) of slurry was controlled by using urea and $NH_4OH$ solution. Urea was also used for deposition-precipitation. For determining termination of reaction, the data acquisition was performed by oxidation reduction potential(ORP), conductivity and pH value in the process of reaction. Termination of the reaction was decided by observing the reaction steps and rapid decrease in conductivity. On the other hand, BET(Brunauer, Emmett and Teller) and thermal diffusity of Ni- doped $\gamma-Al_2O_3$, with various content of Ni were measured and compared. Thermal stability of Ni- doped $\gamma-Al_2O_3$ at $1250^{\circ}C$ was confirmed from BET and XRD analysis. The surface state of Ni-doped $\gamma-Al_2O_3$ was investigated by X-ray photoelectron spectroscopy(XPS). The binding energy at $Ni2P_{3/2}$ increased with increasing the formation of $NiAl_2O_4$ phase.
This study was conducted to prolong the edible period of Kimchi by adding chitosan (0.25, 0.5%) and sodium salts of various organic acids(0.01~0.04M citrate, malate, lactate) . The edible period was estimated by measuring changes in pH. titratable acidity(TA), PH/TA ratio, ascorbic acid content and pectin fraction during Kimchi fermentation at 2$0^{\circ}C$. The results were compared by estimating the maturity of Kimchi fermentation. Kimchi with the chitosan showed higher pH and titratable acidity throughout the fermentation period than that without chitosan. The pH decreased during the fermentation in the order of control, 0.25% chitosan, 0.5% chitosan, 0.5% chitosan+Na-citrate, 0.5% chitosan+Na-malate and 0.5% chitosan+Na-lactate. But the titratable acidity increased in the order of control, 0.5% chitosan+Na-malate, 0.25% chitosan. 0.5% chitosan+Na-citrate, 0.5% chitosan and 0.5% chitosan+Na-lactate. The PH/TA ratio decreased in the order of control, 0.25% chitosan, 0.5% chitosan+Na-malate, 0.5% chitosan, 0.5% chitosan+Na-citrate and 0.5% chitosan+Na-lactate. Ascorbic acid content in Kimchi was the highest at the 3rd day and then decreased during fermentation. Ascorbic acid content in Kimchi containing 0.5% chitosan and organic acid salts was higher than others. Alcohol insoluble solids( AIS ) in Kimchi decreased during fermentation in the order of control, 0.25% chitosan, 0.5% chitosan, 0.5% chitosan+Na-palate. 7.5% chitosan+Na-lactate and 0.5% chitosan+Na-citrate. During fermentation, hot water soluble pectin (HWSP) of control increased, whereas HCI soluble pectin (HCISP) decreased. By addition of chitosan, however, the results became reverse. Chitosan addition appeared to be effective in improving preservation quality of Kimchi during fermention. The edible period become extended by using chitosan plus organic acids instead of using chitosan only. Overall. addition of 0.5% chitosan+Na-lactate seemed most effective in prolonging the edible periods during Kimchi fermentation.
This study was performed to investigate the antioxidant effect of Sansa (Crataegi fructus) extract in vitro, and to evaluate the functional effects of Sansa powder addition on the quality properties and storage characteristics of Tteokgalbi. Total polyphenol and flavonoid contents of Sansa extract were found to be 127.00 mg/g and 54.05 mg/g, respectively. The DPPH radical scavenging activity of Sansa extract was high and it was similar to the BHA and BHT. The Tteokgalbi was prepared by 0% (N), 0.1% (S1), 1% (S2), and 2% (S3) of the Sansa Powder. Addition of Sansa powder decreased the protein and lipid contents, but the ash content was significantly increased (p<0.05). Increasing the amount of Sansa powder in the pork Tteokgalbi tended to increase the water holding capacity (WHC) values and the cooking loss (p<0.05). The addition of Sansa powder increased the hardness and chewiness values, but did not affect the cohesiveness and springiness values. In the sensory evaluation, the S3 Tteokgalbi had the best score in color. Values of pH, total microbial counts, thiobarbituric acid (TBA) and volatile basic nitrogen (VBN) values decreased significantly added Sansa powder relative to the normal (p<0.05). The S3 Tteokgalbi was significantly (p<0.05) more effective for delaying lipid peroxidation than the other groups. Sansa powder addition increased the L (lightness) and a (redness) values. Therefore, the results demonstrate that adding the Sansa powder to the pork Tteokgalbi tended to improve antioxidative and antimicrobial effects during the chilled storage period.
$SiO_2{\cdot}B_2O_3$ was prepared by trimethylborate (TMB)/tetraethylorthosilicate (TEOS) mole ratio 0.01 at $800^{\circ}C$. PDMS[poly(dimethysiloxane)]-$SiO_2{\cdot}B_2O_3$ composite membranes were prepared by adding porous $SiO_2{\cdot}B_2O_3$ to PDMS. To investigate the characteristics of PDMS-$SiO_2{\cdot}B_2O_3$ composite membrane, we observed PDMS-$SiO_2{\cdot}B_2O_3$ composite membrane using TG-DTA, FT-IR, BET, X-ray, and SEM. PDMS-$SiO_2{\cdot}B_2O_3$ composite membrane was studied on the permeabilities of $H_2$ and $N_2$ and the selectivity ($H_2/N_2$). Following the results of TG-DTA, BET, X-ray, FT-IR, $SiO_2{\cdot}B_2O_3$ was the amorphous porous $SiO_2{\cdot}B_2O_3$ with $247.6868m^2/g$ surface area and $37.7821{\AA}$ the mean of pore diameter. According to the TGA measurements, the thermal stability of PDMS-$SiO_2{\cdot}B_2O_3$ composite membrane was enhanced by inserting $SiO_2{\cdot}B_2O_3$. SEM observation showed that the size of dispersed $SiO_2{\cdot}B_2O_3$ in the PDMS-$SiO_2{\cdot}B_2O_3$ composite membrane was about $1{\mu}m$. The increasing of $SiO_2{\cdot}B_2O_3$ content in PDMS leaded the following results in the gas permeation experiment: the permeability of both $H_2$ and $N_2$ was increased, and the permeability of $H_2$ was higher than $N_2$, but the selectivity($H_2/N_2$) was decreased.
Journal of the Korean Society of Food Science and Nutrition
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v.34
no.3
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pp.395-402
/
2005
White layer cakes with 10-50% content of domestic millet and waxy millet were carried out to determine how the content of millet and waxy millet affected Quality and properties of a product. The 10% content of waxy millet resulted in the greatest volume, which decreased with the increase in the content of millet and waxy millet; up to 40% content of millet and waxy millet made no significant difference in weight from the control one. The specific loaf volume decreased with the increase in the content of millet and waxy millet. In terms of crum color, as the content of millet and waxy millet increased, the value of L tended to decrease, making it darker, and there was a significant increase in the value of a and b. As for crust color, the value of L, a, and b tended to increase with the increase in the content of millet and waxy millet, making it darker, but with no significant difference from the control one. In terms of texture, 10% content of millet and 10-20% content of waxy millet made no significant difference in hardness from the control one; as for retrogradation, waxy millet tended to make greater increase in hardness than millet. 5℃ storage resulted more rapidly in retrogradation than 25℃. The sensory evaluation showed that with the increase in the content, waxy millet, millet, and the control in order served to make it darker and harder in terms of external properties, with small pores, uneven texture, and reduced flavor in terms of internal properties. There was no significant difference between the cake with 10-20% content of millet and waxy millet and the control one in making a white layer cake by adding millet and waxy millet.
Journal of the Korean Society of Food Science and Nutrition
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v.34
no.5
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pp.573-580
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2005
Cholesterol $7\alpha-hydroxylase$ (CYP7A1) is the rate-limiting enzyme in the conversion of cholesterol to bile acids and plays a central role in regulating cholesterol homeostasis. We previously showed that a fermentable $\beta-glucan$ ingestion decreased plasma cholesterol levels due to fecal bile acid excretion elevation involved inincrease of cholesterol $7\alpha-hydroxylase$ mRNA expression and activity. It is proposed that short chain fatty acids (SCFA) produced by cecal and colonic fermentation of soluble fiber are associated with cholesterol-lowering effect of fiber. In the present study, we investigated whether CYP7A1 expression is up-regulated by short chain fatty acids or by hormones in cultured human hepatoma (HepG2) cells. Confluent HepG2 cell were incubated with acetate, propionate, or butyrate at 1 mM concentration for 24 hrs. Acetate as well as propionate increased to 1.8-fold expression of CYP7A1 mRNA than the control. Butyrate also increased 1.5-fold expression of CYP7A1 mRNA. Our data show for the first time that SCFA increase expression of CYP7A1 mRNA. Adding insulin, dexamethasone and triiodothyronine $(1\;{\mu}M)$ to HepG2 cell increased the expression of CYP7A1 mRNA to $150\%,\;173\%,\;141\%$, respectively. These results suggest that SCFA produced by cecal fermentation stimulate enteric nervous system, in which secreted some neuropeptides may be responsible for change in cholesterol and bile acid metabolism. These findings suggest that SCFA are involved in lowering plasma cholesterol levels due to the up-regulation of CYP7A1 and bile acid synthesis.
Park, Kyung-Sook;Lee, Kyung-Soo;Youn, Dong-Hwa;Moon, Yoon-Hee;Park, Hyun-Suk;Jung, In-Chul
Journal of the Korean Society of Food Science and Nutrition
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v.36
no.7
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pp.896-901
/
2007
This study was carried out to investigate the effect of the addition of olive and soybean oil on the color, water holding capacity, cooking loss, increase rate of thickness, decrease rate of diameter, pH, VBN content and TBARS value of ground pork loin during cold storage for 15 days. Ground pork loin were prepared by three types such as ground pork loin containing 20% pork fat (GP-P), ground pork loin containing 20% olive oil (GP-O) and ground pork loin containing 20% soybean oil (GP-S). The $L^{\ast}$ (lightness) and $b^{\ast}$ (yellowness) value of GP-P, GP-O and GP-S were not significantly different during storage, and the $L^{\ast}$, $a^{\ast}$ and $b^{\ast}$ value of GP-P were higher than those of GP-O and GP-S (p<0.05). The water holding capacity tended to increase along with storage period, the water holding capacity of GP-P was higher than that of GP-O and GP-S. Also, the cooking loss of GP-P was lower than that of GP-O and GP-S (p<0.05). The increase rate of thickeness by cooking increased along with storage period, but the decrease rate of diameter was tend to decreased with increase in storage period (p<0.05). The pH of all ground pork loins decreased until storage at 5 days, but increased at 15 days (p<0.05). The VBN content of all ground pork loins increased along with storage period, and the VBN content of GP-P was higher than that of GP-O and GP-S (p<0.05). The TBARS value of all ground pork loins increased along with storage period; also, the VBN content of GP-P was the highest among all ground pork loins and GP-O was the lowest among all ground pork loins (p<0.05).
The chromaticity, mechanical, and sensory properties of madeleine were investigated during its manufacturing process based on additions of black bean chungkukjang flour containing functional health ingredients and a high nutritient value. 1. The moisture content decreased with increasing content of the chungkukjang flour$(16.1{\sim}13.7%)$. 2. The brightness of the Madeleine decreased significantly from 75.24 to 53.61 by increasing the content of the black bean chungkukjang flour. The degree of red color increased significantly from -0.31 to 4.93 by increasing the content of the black bean chung kukjang flour. 3. For the mechanical properties, the hardness increased significantly with increasing amounts of the black bean chungkukjang flour (p<0.05). The degree of fracturability, adhesiveness, and gumminess also increased with the increasing the content, but the fracturability showed no difference by either addition. The springiness and cohesiveness decreased significantly by increasing the content of the black bean chungkukjang flour, showing an opposite result compared to the hardness. 4. The results of the sensory evaluation indicated significant differences in color among the samples(p<0.05). The color of the madeleine samples with added black bean chungkukjang flour was more preferred than that of the sample without any additive. The degree of preference increased in the order of the quantity of the additive. The moistness and softness became significantly drier and less soft, respectively, with an increasing quantity of the black bean chungkukjang flour (p<0.05). For the overall acceptance, the BC10 sample added with 10% of black bean chungkukjang flour added had the highest acceptance. This may be because it did not have a strong chungkukjang odor and had the fewest differences from the control Madeleine without the additive, in terms of its moistness and softness. Based upon these results, adding10 % of black bean chungkukjang flour in the manufacture of Madeleine is an appropriate quantity with regard to its structural and sensory characteristics.
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