• Fashion & Textile Research Journal
• /
• v.15 no.5
• /
• pp.808-814
• /
• 2013

In this study, The mixture of three kinds of pre-treatment agents, Carboxymethyl cellulose sodium salt(CMC), Sodium alginate and Dextrin, have been prepared for the better coloration of digital textile printing. To get sharpness of outline during digital printing process, the optimal formulation is the CMC and Sodium alginate mixture 1:1 ratio by volume. Cyan, Yellow, and Black colours are excellent on the Sodium alginate mixtures. But, Magenta is excellent in the CMC and Dextrin mixture. Sharpness and printability are closely related to viscosity of the mixture. The most optimal sharpness of outline achieved with a consideration of coloring, and field operations account for production when the viscosity of the mixed pre-treatment agent approximately is 10~13 cSt. Change in shade and staining of wash fastness for all the treated samples with the mixtures rated 4-5 grade. Both dry rubbing fastness to shade change and staining are good in the treated samples, whereas wet rubbing fastness rated 2-3 grade. To improve wet rubbing fastness, the Sodium alginate and Dextrine mixture, which rated 3-4 grade for Black color, is applicable. With exception of 3 rating to black color, Light fastness is 4 rating for the remaining three colors in the regardless of treatment condition and mixing of the pre-treatment agent. Dry cleaning fastness of all samples are also 4-5 rating.

• Journal of Microbiology and Biotechnology
• /
• v.29 no.3
• /
• pp.357-366
• /
• 2019

We first confirmed the involvement of MalQ (4-${\alpha}$-glucanotransferase) in Escherichia coli glycogen breakdown by both in vitro and in vivo assays. In vivo tests of the knock-out mutant, ${\Delta}malQ$, showed that glycogen slowly decreased after the stationary phase compared to the wild-type strain, indicating the involvement of MalQ in glycogen degradation. In vitro assays incubated glycogen-mimic substrate, branched cyclodextrin (maltotetraosyl-${\beta}$-CD: G4-${\beta}$-CD) and glycogen phosphorylase (GlgP)-limit dextrin with a set of variable combinations of E. coli enzymes, including GlgX (debranching enzyme), MalP (maltodextrin phosphorylase), GlgP and MalQ. In the absence of GlgP, the reaction of MalP, GlgX and MalQ on substrates produced glucose-1-P (glc-1-P) 3-fold faster than without MalQ. The results revealed that MalQ led to disproportionate G4 released from GlgP-limit dextrin to another acceptor, G4, which is phosphorylated by MalP. In contrast, in the absence of MalP, the reaction of GlgX, GlgP and MalQ resulted in a 1.6-fold increased production of glc-1-P than without MalQ. The result indicated that the G4-branch chains of GlgP-limit dextrin are released by GlgX hydrolysis, and then MalQ transfers the resultant G4 either to another branch chain or another G4 that can immediately be phosphorylated into glc-1-P by GlgP. Thus, we propose a model of two possible MalQ-involved pathways in glycogen degradation. The operon structure of MalP-defecting enterobacteria strongly supports the involvement of MalQ and GlgP as alternative pathways in glycogen degradation.

• Korean journal of food and cookery science
• /
• v.30 no.6
• /
• pp.663-669
• /
• 2014

We preprocessed and pickled Deodeok with Doenjang to improve its preservability and to distribute it widely, and we stored Deodeok for 3 weeks at $7^{\circ}C$ and measured its quality. The sample pre-treated with 20% of dextrin retained its early texture better than the samples pre-treated with other methods after 3 weeks of storage (p<0.05). The samples pre-treated with other controls showed propagation of microorganisms; but Doenjang pre-treated with 20% of dextrin or sugar showed less increase in the water content. The microorganisms count in samples pre-treated with other controls was 4.0 log CFU/g after 3 weeks of storage, but the microorganisms count in the sample pre-treated with 20% of dextrin was 2.2 log CFU/g; in other words, the propagation of microorganisms was minimized in the sample pre-treated with 20% of dextrin (p<0.05). In the investigation of the preferences, this D-20 sample showed maximum improvement in color, smell, taste, and other general preferences factors. Thus, the best processing method for the optimal quality maintenance of Deodeok is to sugarize it with 20% of dextrin before pickling with Doenjang. The product prepared using with this process can be preserved for 3 weeks at $37^{\circ}C$; that is, this product is expected to have a refrigerator shelf life of 3 months.

• Korean Journal of Agricultural Science
• /
• v.13 no.1
• /
• pp.52-61
• /
• 1986

Mycelial growth of Colletotrichun dematium and C. gloeosporioides isolated from anthracnose of Lycium chinense was favorable on V-8 Juice Agar media and Oatmeal Agar media of the four different media tested. Sporulation of C. dematium was favorable on PDA media and V-8 Juice Agar media and that of C. gloeosporioides was favorable on all media tested. The optimum temperature for mycelial growth of C. gloeosporioides and C. dematium was $25^{\circ}C$ and $28^{\circ}C$, respectively and sporulation of the fungi was stimulated under alternating NUV light and darkness. Of the seven nitrogen sources tested, gelatin was the most favorable for mycelial growth of C. gloeosporioides and glycin and gelatin were favorable for that of C. dematium. Of the eleven carbon sources tested, dextrin and sorbitol were favorable for mycelial growth of C. gloeosporioides and dextrin was the most favorable for that of C. dematium. Among the eleven fugicides tested, Benomyl, Folpet, Dithianon, Carbendazim and S-3308L were found superior for the inhibition of mycelial growth and spore germination of the fungi. They were, also, found superior for the control of anthracnose disease of L. chinense when they were applied to the plants in the field.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.25 no.4
• /
• pp.560-567
• /
• 1996

The present study was undertaken to evaluate the effect of indigestible dextrin on bowel function and serum lipid. Recently developed indigestible dextrin is water soluble dietary fiber obtained by heating and enzyme-treatment of potato starch with low viscosity. SD male rats weighing 80~85g were divided into three groups; control diet(IC), control +5% pectin(IP), control +5% indigestible dextin(ID). Experimental rats were fed one of the experimental diets ad libitum for six weeks. Weight gain, food intake, and food efficiency ratio were not significantly different among other groups. Those of ID tended to be higher than in IP and IC. Weights of liver, spleen and kidney were not significantly different among groups. Epididymal fat pads weight in W and ID tended to be lower than in IC. The weight of cecum was sinificantly higher in m than in other groups(p<0.05). The weight and length of large intestine tended to be higher in IP and ID than in IC. Total feces excretion of ID and If tended to be more than that of IC. Transit time was shorter in IP than in other groups. Serum total lipid, total cholesterol and TG levels were higher in IC group than other groups. The fecal excretion of lipid was significantly higher in IP than in other groups(p<0.05). That of ID tended to be more than that of IC, so fat apparent absorption of ID was lower than that of IC. Ca absorption were decreased more in IP than in other groups(p<0.05).

• Journal of Aquaculture
• /
• v.11 no.2
• /
• pp.133-140
• /
• 1998

A 20-week growth trial was conducted in flow-through aquarum system to investigate the practical dietary carbohydrate sources for juvenile abalone (Haliotis discus hannai). Four replicate grops of the abalone averaging 0.125g were fed one of eight diets containing 24.2% wheat flour (WF), 20% dextrin (DEX), 20% sucorse (SUC), 10% $^{\alpha}$-potato starch+10% $^{\beta}$-potato starch (ab-S), 15% $^{\alpha}$-potato starch (a-S15), 20% $^{\alpha}$-potato starch (a-S20), 25% $^{\alpha}$-potato starch (a-S25), or mixture (MIX) with practical ingredients such as soybean meal, corn gluten meal, cotton seed meal and heat flour. In addition, these formulated diets were compare with macroalgae such as dried sea mustard Undaria (D-SM) or dried sea tangle Laminaria(D-ST). Survival rate, weight gain, shell growth and soft body weight of abalone were not significantly affected by the different dietary carbohydrate sources (P>0.05), whereas those fed a-S15 diet were slightly low. These values of abalone fed D-ST were lowest (P<0.05), followed by those fed D-SM. Lipid contents of soft body from abalones fed a-S25, D-ST or D-SM were significantly lower than those of abalone fed other diets (P<0.05). These data indicate that abalone can equally utilize any carbohydrate sources used in this study.

• The Korean Journal of Mycology
• /
• v.42 no.2
• /
• pp.150-158
• /
• 2014

Four ectomycorrhizal fungi were tested for their ability to utilize seven carbon sources in modified Melin-Norkrans medium. After 60 days of mycelial culture, the highest mycelial growth in Hygrophorus russula (KFRI 1987), Sarcodon aspratus, Leccinum extremiorientale (KFRI 1194), and Tricholoma matsutake (KFRI 1256) was observed with use of dextrin used as a carbon source. H. russula, S. aspratus (KFRI 1676), and L. extremiorientale showed the lowest mycelial growth on nutrient medium with pectin. The utilization of homoglycans (starch, dextrin) in seven strains (except for T. matsutake KFRI 1256) was higher than that of heteroglycan (pectin). The final pH values of all culture media were decreased by pH 1.1~3.0 compared with the initial pH values of culture media. The dominant color of mycelia was white and varied according to the carbon sources (yellow, brown, and purple) in some strains. A single colony was observed in L. extremiorientale cultured in liquid media containing four or five different types of carbon sources, whereas multiple colonies were formed in liquid media containing six different types of carbon sources by six strains.

• Food Science and Preservation
• /
• v.22 no.3
• /
• pp.385-391
• /
• 2015

This study was conducted to develop a spray-dried garlic chives (Allium tuberosum) powder and to evaluate its quality characteristics depending on the treatment of steam blanching pretreatment $100^{\circ}C$, 3 min) and the addition of forming agents (dextrin (DE=10), ${\beta}$-cyclodextrin) during process. The steam blanching pretreatment showed an increase in $L^*$ value while a decrease in $-a^*$, $b^*$, $C^*$, and $h^o$ values of the powder. Moisture content and water soluble index were not affected by the treatment of steam blanching and the addition of forming agents, whereas the particle diameter was the smallest in the steam blanching treatment and dextrin addition. Chlorophyll, phenolic compound, and vitamin C content, and DPPH radical scavenging activity of non-pretreated powder were significantly higher than those of the steam blanching treated powders. However, there was no significant difference between the two forming agents. The sensory acceptability (color, smell, and overall acceptability) of powder treated with steam blanching were significantly higher than those of non-pretreated powders. Therefore, the steam blanching pretreatment of fresh garlic chives affected on the better quality characteristics of the spray-dried powders when compared with non-pretreated powder though it adversely affected the natural chemical quality of fresh garlic chives.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.33 no.6
• /
• pp.951-957
• /
• 2004

Hypoglycemic effect of Prunus mume (PM) extract containing in Sangjinyangheul-tang and Hwangkeumtang, one of the diabetic herbal medicines, was determined by investigating insulin-like action, insulin sensitizing action and a-glucoamylase suppressing action. Insulin-like activity of 3T3-L1 fibroblast was not shown with the treatment of PM methanol extracts. However, treatment with 20% or 40% PM methanol extracts and differentiation inducers significantly decreased the differentiation of 3T3-L1 fibroblasts to adipocytes. A significant insulin sensitizing activity was observed in 3T3-L1 adipocytes, giving PM extracts (60%, 80% and 100%) with 1 ng/mL insulin to reach glucose uptake level increased by 50 ng/mL of insulin alone. In addition, 20% and 40% methanol extracts of PM suppressed the a-glucoamylase activity by 30% in vitro. However, there was no significant differences in the peak of serum glucose levels and area under the curve in Sprague Dawley male rats treated with PM ethanol extract or cellulose and 2 g maltose or dextrin/kg body weight. These data suggested that PM extracts contain effective insulin sensitizing compounds, lipid synthesis suppressing compounds and possibly a-glucoamylase suppressing compounds. Therefore, PM extracts are beneficial for anti-diabetic treatment in obese diabetic patients.

• Clean Technology
• /
• v.30 no.3
• /
• pp.220-227
• /
• 2024

As the demand for lithium-ion batteries with high capacity and high energy density has rapidly increased, silicon anodes (theoretical capacity = 3,570 mA h g^-1) have garnered attention as potential replacements for conventional graphite anodes (theoretical capacity = 372 mA h g^-1). However, silicon anodes suffer from severe volume expansion (~360%) during lithiation, low ionic conductivity (10^-14 ~ 10^-13 cm² S^-1), and low electrical conductivity (10^-2 S cm^-1), resulting in poor cycling and rate performance. To address these issues, this study synthesized core@shell-structured silicon@carbon nanoparticles (Si@C NPs) via a one-pot spray pyrolysis process using Pluronic-F127. Pluronic-F127 in the spray solution contributes to the synthesis of nanoparticles by preventing the formation of silicon nanoparticle/dextrin agglomerates and by undergoing pyrolysis simultaneously. Additionally, dextrin derived amorphous carbon was coated on the surface of the silicon nanoparticles to act as an electron transport pathway within the anodes and enhance the electrical contact between the silicon nanoparticles. The Si@C NPs exhibited a discharge capacity of 1,912 mA h g^-1 after 50 cycles at 1.0 A g^-1 and high rate capabilities (discharge capacity of 1,493 mA h g^-1 at 3.0 Ag^-1). The silicon@carbon composite nanoparticle synthesis strategy based on the spray pyrolysis process presented in this study is expected to offer a new direction for improving the performance of silicon anode materials.