Lee, Sang Hoon;Jang, Gwi Yeong;Kim, Hyun Young;Woo, Koan Sik;Hwang, In Guk;Kim, Kee Jong;Lee, Mi Ja;Kim, Tae Jip;Lee, Junsoo;Jeong, Heon Sang
Journal of the Korean Society of Food Science and Nutrition
/
v.41
no.12
/
pp.1764-1770
/
2012
This study was performed to investigate the changes of total and soluble ${\beta}$-glucan contents, purity, and physical characteristics of three heated barley varieties: Saessalbori (SSB), Saechalssalbori (SCSB), and Hinchalssalbori (HCSB). The barleys were heated at different temperatures of 110, 120, 130, 140 and $150^{\circ}C$ for 2 hours. The total ${\beta}$-glucan contents of raw SSB, SCSB, and HCSB were 8.40, 7.77 and 8.28%, and the soluble ${\beta}$-glucan contents were 4.79, 4.14, and 4.61%, respectively. After heating at $130^{\circ}C$, the total ${\beta}$-glucan contents increased to 11.59, 14.6, and 13.36%, as did the soluble ${\beta}$-glucan contents to 4.21, 7.96, and 7.23%, respectively. The purities of soluble ${\beta}$-glucan of the raw barleys were 35.11, 32.74 and 25.62%, but after heating at $150^{\circ}C$, it increased to 83.43, 91.02, and 88.01%, respectively. The molecular weight and viscosity of the ${\beta}$-glucan solution decreased with increasing heating temperature. The re-solubility of raw barley ${\beta}$-glucan was about 50%, but it was increased to 97% with increasing heating temperature. These results suggest that heating of ${\beta}$-glucan can improve the utilization of barley ${\beta}$-glucan.
Jo, Jae-Myeong;Kang, Sun-Goo;Kim, Ki-Hyeon;Chung, Byeong-Jae
Journal of the Korean Wood Science and Technology
/
v.2
no.2
/
pp.25-31
/
1974
1. Various gluing qualities applying Resorcinol Plyophen #6000 were studied on aiming the strength relationships of laminated woods resulted by single species [poplar (Populus deltoides), larch(Larix leptolepis)], mixed species of (poplar and larch), preservatives, treated poplar the scarf joint with mixed species of poplar and larch and the scarf joint treated with preservatives. 1. 1 On the block shear and on the DVL tension test, the mean wood failure ratio showed an excellent value i.e., above 65% and the tangential strength for larch was higher than that of radial, but it was reversed for poplar as shown in Tables 1 and 2. 1. 2 The lamina treated with Na-PCP reduced slightly the strength but the limited strength allowed for manufacturing laminated wood was not influenced by treating Na-PCP as shown in Tables 3 and 4. 1. 3 The safe scarf ratio in the plane scarf joint was above 1/12 for larch and 1/6 for poplar regard less of the chemical treatment or untreatment as shown in Tables. 5, 6, 7 and 8. 2. In the normal and boiled state, the gluing quality of the laminated wood composed of single[poplar (Populus deltoides), larch (Larix leptolepis)] and double species (poplar and larch) glued with Resorcinol Plyophen #6000 were measured as follow, and also represented the delamination of the same laminated wood. 2.1 The normal block shear strength of the straight and curved laminated wood (in life size) were more than three times of the standards adhesion strength. And, the value of the boiled stock was decreased to one half of the standard shear adhesion strength, but it was more than twice the standard strength for the boiled stock. Thus, it was recognized that the water resistance of the Resorcinol Plyophen #6000 was very high as shown in Tables 9 and 10. 2. 2 The delamination ratio of the straight and curved laminated woods in respect of their composition were decraesed, in turn, in the following order i. e., larch, mixed stock (larch+poplar) and poplar. The maximum value represented by the larch was 3.5% but it was below the limited value as shown in Table 11. 3. The various strengthes i.e., compressive, bending and adhesion obtainted by the straight laminaced wood which were constructed by five plies of single and double species of lamina i. e., larch (Larix leptolepis) and poplar (Populus euramericana), glued with urea resin were shown as follows: 3. 1 If desired a higher strength of architectural laminated wood composed of poplar (P) and larch (L), the combination of the laminas should be arranged as follows, L+P+L+P+L as shown in Table 12. 3.2 The strength of laminated wood composed of laminas which included pith and knots was conside rably decreased than that of clear lamina as shown Table 13. 3.3 The shear strength of the FPL block of the straight laminated wood constructed by the same species which were glued with urea adhesives was more than twice the limited adhesion strength, thus it makes possible to use it for interior constructional stock.
This study was carried out to isolate some bacterial strains which had potentiality of good degrader of fungicides from herbicide free soil and to clarify degradation of a fungicide mycrobutanyl[2-p-chlorophenyl-2-(1H-1,2,4-triazole-1-ylmethyl)-hexanenitrile]. Ten strains of the gram-positive and the gram-negative bacteria were isolated and identified. Most of them vigorously proliferated at 55ppm of mycrobutanil, but the stains were not grown when more than 70ppm of this fungicide were treated Staphylococcus spp. I, Actinobacillus spp. III, and another I of the isolated bacteria degraded more than 35% of the treated mycrobutanil. These three strains could utilize mycrobutanil as nitrogen and carbon sources. Mycrobutanil was rapidly decomposed by these strains when applied once or three times. Tested bacteria gradually increased in growth when mycrobutanil was applied repeatedly. Degradation of mycrobutanil and growth of these bacteria were greater in pH 5.5, and they were high in the order of $28^{\circ}C$ > $18^{\circ}C$ > $38^{\circ}C$.
A study was conducted for the determination of application rate of pig-dung composted with sawdust (referred as pig manure hereafter) for wetland rice. The study involved the field experiments with the cultivation of rice under different rates of application of pig manure in combination of different rates of chemical fertilizers, in a wetland rice soil. The field experiment involved following treatments : (I) Without fertilizer, (II) Standard rate of chemical fertilizers based on soil testing($98-73-71kg\;ha^{-1}$ as $N-P_2O_5-K_2O$), (III) $2.1Mg\;ha^{-1}$ of pig manure $>+80-37kg\;ha^{-1}$ of $N- K_2O$ as chemical fertilizer(Less $N-P_2O_5-K_2O$ contained in the compost), (IV) $4.2Mg\;ha^{-1}$ of pig manure+ $62-3kg\;ha^{-1}$ of $N-K_2O$as chemical fertilizer(Less $N-P_2O_5-K_2O$ contained in the compost), (V) $10Mg\;ha^{-1}$ of pig manure+ Treatment(II), (VI) $20Mg\;ha^{-1}$ of pig manure +Treatment(II). Number of tillers in treatment (I) were higher than other treatments in tillering and panicle formation stage. After heading stage, treatments (V) and (VI) have higher number of tillers, but treatment (III) and (IV) have fewer number of tillers during all growing stage. Uptake of NPK in rice plants was higher in treatment (VI), but the efficiency of N, P and K was higher in treatment (I), (III) and (IV). The yield of unhulled rice were in order of tretments (VI)>(V)>(IV)>(II)>(III), although the difference was not statistically significant. Inorganic nitrogen, available P and exchangable K contents in soil were highest at tillering stage in all treatments and became low from panicle formation to harvest stage. Available P in soil was increased by the application of pig manure upto 20 cm depth. Exchangeable cation contents in 40 to 60 cm soil depth was much higher in treatment (VI) than in other treatments. Treatment (V) and (VI) showed much higher losses of N. $P_2O_5 $ and $K_2O$ than other treatment. Though treatment (VI) tended yield higher than in other treatments, showed lodging and occurrence of leaf and neck blast in this treatment. Yield of unhulled rice in treatment (IV) was not significant statistically and reduced nutritional losses. It is conclude that treatment (IV) seems to be the most reasonable one for the application of pig manure in combination of chemical fertilizers.
Park, Jung-Mi;Shin, Sang-Hyun;Kang, Chun-Sik;Kim, Kyung-Hoon;Cho, Kwang-Min;Choi, Jae-Seong;Kim, Hyung-Moo;Park, Jong-Chul
Research in Plant Disease
/
v.18
no.3
/
pp.194-200
/
2012
The objective of this research was to select effective fungicides for the control of Fusarium head bight (FHB) of wheat. We tested fourteen commercial fungicides against FHB in the laboratory and under field. Fludioxonil FS, Fludioxonil SC, and Benomyl + Thiram WP highly inhibited the mycelial growth of Fusarium graminearum on the medium while Oxine-copper WP, Thiophanate-methyl WP, and Copper hydroxide WP were not effective against FHB. To verify the disease control in field condition, we selected four fungicides such as Fludioxonil SC, Captan WP, Difenoconazole + propiconazole EC, and Metconazole SC. Their control efficacy on FHB disease severity of wheat was examined after the fungicide treatment twice (30th April and 10th May, 2012) in the two field locations (Iksan and Gimje). With no treatment, FHB severity was 45% and 33.7% in Gimje and Iksan, respectively. FHB disease incidence after fungicide treatment was between 0.3% and 2.2% in Gimje, showing over 95% FHB disease control. FHB disease incidence of fungicide-treated sector in Iksan showed slightly higher than Gimje but the control value of fungicides exhibited 87-90%. No side effect of the chemicals was observed in fungicide treatment. These results showed that four fungicides were effective in the FHB disease control in wheat.
Journal of the Korean Society of Food Science and Nutrition
/
v.37
no.10
/
pp.1343-1356
/
2008
The evaluation of microbiological quality for school food samples collected from 19 selected middle and high schools located in Seoul was undertaken. Eighty-nine food samples consisting of 38 non-pretreated vegetables, 13 pre-washed and cut vegetables, 9 meats and poultry, 3 fish and shellfish, 7 dried fish, and shellfish and 20 processed foods were collected. Aerobic plate count, total coliforms, and Escherichia coli (E. coli ) were detected using $Petrifilm^{TM}$, and the food-borne pathogens were screened by multiplex PCR with species-specific primer sets. Sequentially, the quantitative and confirmative test of the food-borne pathogens were carried out with the selective media and biochemical kits. The contamination of coliform counts was observed on the pre-washed vegetables ($3.4{\sim}4.3\;log\;CFU/g$) and meats ($2.2{\sim}4.3\;log\;CFU/g$). Also, the cooked foods were heavily contaminated with coliform, ranging from 1.0 to $5.5\;log\;CFU/g$. E. coli counts were found in 16 raw and cooked food samples, exceeding the microbiological standards for the guideline of safety management for school foods. Through PCR detection, B acillus cereus was detected in 32 raw and cooked foods, and quantitatively found in pre-washed carrot, radish, and pan-broiled dried shrimp and filefish ranging from $2.3{\sim}3.6\;log\;CFU/g$, respectively. E. coli O157:H7 was detected on frozen pork sample and was confirmed with API kit. Campylobacter jejuni was found in 3 ready-to-eat type vegetables. Vibrio parahaemolyticus were found in 4 pre-washed vegetables and 2 cooked foods, indicating unsatisfactory quality based upon the microbiological standards of ready-to-eat vegetables and cooked foods by Korea Food and Drug Administration. Salmonella spp. was detected in frozen chicken sample and confirmed by API kit and latex antisera agglutination.
Journal of the Korean Society of Food Science and Nutrition
/
v.14
no.4
/
pp.345-352
/
1985
To characterize the protein from arrowroot leaf, proteins were extracted and separated from arrowroot leaf, then its amino acid composition and functional properties were studied. Protein in arrowroot leaf was consisted of 18.5% albumin, 33.5% globulin, 34.0% glutelin, 6.2% protamine and 7.8% insoluble residues. The rates of precipitation of proteins which extracted with water, 1M NaCl, and 0.015N NaOH as a solvent were 84.7% (at pH 3.0), 76.4% (at pH 2.5) and 86.4% (at pH 4.0), respectively. The extracted proteins were separated up to about 90% by organic solvents such as ethanol and acetone at 80% concentration, Composition of arrowroot leaf protein concentrates were: $1{\sim}2%$ moisture, $59{\sim}67%$ protein, $4{\sim}8%$ ash and $5{\sim}6%$ (dialyzed concentrates) or $1{\sim}2%$ (acetone-treated ones) lipid. Main amino acids of the concentrates were aspartic acid, glutamic acid and glycine. Solubility profile of the concentrates according to pH was typical. The minimum solubility (below pH 5.0) of acetone extracted protein concentrates was lower than that of unextracted ones, whereas the reverse was true for pH value above this region. Bulk density, water and fat absorption of the concentrates were attributable to correlation to the treatment of acetone. And the bulk density of the concentrates was negatively correlative to both water and fat absorption. Emulsifying and foaming properties were not varied with the treatment of acetone.
Kim, Yo-Hwan;Lim, Jong-Hui;An, Chang-Hwan;Jung, Byung-Kwon;Kim, Sang-Dal
Journal of Applied Biological Chemistry
/
v.55
no.1
/
pp.47-53
/
2012
Increasing concerns over green farming technology, plant growth promoting rhizobacterium (PGRP) having growth promoting as well as plant disease suppressing properties was recently preferred to use for biological control of plant pathogens infecting plant. We measured the influence of the selected microbial consortium agents-a mixture of PGPR strains-, commercial bio-fungicide, and chemical pesticides on soil microbial community in red pepper field. The activities of soil enzyme such as dehydrogenase, urease, phosphatase, ${\beta}$-glucosidase, and cellulase were analyzed to investigate that of soil microbial community. We also measured plant length, main stem, stem diameter, number of branches and yields of red-pepper in order to observe the red pepper growth promotion. The results of measuring enzyme activities were dehydrogenase 3.5584 ${\mu}g$ TPF $g^{-1}h^{-1}$, urease 15.8689 ${\mu}g$$NH_4{^-}N$$g^{-1}h^{-1}$, phosphatase 0.5692 ${\mu}g$ PNP $g^{-1}h^{-1}$, ${\beta}$-glucosidase 2.4785 ${\mu}g$ PNP $g^{-1}h^{-1}$, and cellulase 86.1597 ${\mu}g$ glucose $g^{-1}h^{-1}$ in the soil treated with the microbial consortium agents, so it came out to be very active in the soil. Observing the growth of red-peppers, the main-stem length and the stem diameter were 6.1% and 8.1% higher in the soil treated with the selected microbial consortium agent than the chemical pesticides. After harvesting, yields were 7.3% higher in the soil treated with selected microbial consortium agents than the chemical pesticides. These results showed that microbial consortium agents contribute to increasing soil microbial diversity, growth promoting, and yield of red pepper.
Journal of the Korean Society of Food Science and Nutrition
/
v.35
no.10
/
pp.1297-1303
/
2006
This study was conducted to investigate the anticancer (in vitro) and antiallergy effects of rice bran extracts. In an anticancer test using Hep3B cells and HeLa cells, water and 60% ethanol extracts of rice bran inhibited the growth of Hep3B and HeLa cell lines and morphological changes were also observed. In Hep3B cell lines, water extract of rice bran showed a higer antiproliferating effect than 60% ethanol extract. The growth-inhibitory effect against HeLa cells were 30.9% for $1,000{\mu}g/mL$, 88.8% for $3,000{\mu}g/mL$ rice bran water extract. The expressions of $Fc{\varepsilon}RI$ mRNA and c-kit in HMC-1 (human mast cell) were decreased by 60% ethanol treatment but tryptase mRNA was not changed. The extracts of rice bran inhibited histamine release from RPMC (rat peritoneal mast cell) activated by compound 48/80. Rice bran water extract showed inhibitory effect of 87% at $0.01{\mu}g/mL$ concentration and 60% ethanol extract inhibited the release of histamine by 86% at $100{\mu}g/mL$ concentration.
Kim, Jeom-Soon;Lee, Young-Gyu;Kwon, Min;Kim, Ju-Il;Lee, Gye-Jun;Lee, Jeong-Tae;Ryu, Jong-Soo
Research in Plant Disease
/
v.18
no.2
/
pp.117-122
/
2012
In 2006, the effect of soil pH adjustment on control of common scab of potato caused by Streptomyces spp. was evaluated in the field. Soil with an original pH 5.7 was treated with sulfur of 42 kg/10a and calcium hydroxide of 81.6 kg/10a and 184.5 kg/10a to adjust pH 5.0, 6.0 and 6.5, respectively. Additionally, the effect of gypsum (522 kg/10a) on soil pH and disease severity was examined. The soil pH of sulfur treatment plot was continuously declined from 5.13 at tuber initiation time to 5.01 at harvest. The disease severity of sulfur treatment plot was relatively low (22.8%) and the marketable yield of that was high (90.5%). By contrast, the soil pHs treated with calcium hydroxide (81.6 kg/10a and 184.5 kg/10a) were increased (pH 6.06 and 6.49, respectively) at harvest. In addition, calcium hydroxide treatment plots showed higher disease severities (51.0% and 61.1%), and lower marketable yields (55.7% and 37.0%). Meanwhile, the soil pH of gypsum treatment plot was not changed until harvest, and the disease severity and the marketable yield were not significantly different from those of control. The effect of crop rotation was also evaluated with four crops such as welsh onion, soybean, corn and Chinese cabbage. These crops were planted in the infested field from 2005 to 2007, and potatoes were planted in the same field in 2008. The disease severities of potatoes produced after rotations with welsh onion, soybean, corn and Chinese cabbage for 3 years were 13.1%, 16.7%, 28.9% and 30.2%, respectively. However, the disease severity of 73.1% was shown in continuous cropping of potato for 3 years. In addition, similar effects were exhibited in the marketable yield. These results demonstrate that the adjustment of soil pH and crop rotation might be very useful tools to control common scab of potato.
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