• Journal of the Korean Wood Science and Technology
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• v.41 no.6
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• pp.528-534
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• 2013

This study was carried out to explore a new application of board and obtain fundamental properties for producing composite board from sawdust and orange peels. As the mixing rate of orange peels increased from 10% to 40%, water absorption, thickness swelling, modulus of rupture and brinell hardness decreased as follows : 94.1%~86.5%, 27.2%~18.0%, $65.1kgf/cm^2{\sim}39.2kgf/cm^2$ and $195.3kgf/cm^2{\sim}180.3kgf/cm^2$, respectively. As the density of board increased from $0.4g/cm^3$ to $0.8g/cm^3$, thickness swelling, modulus of rupture and brinell hardness increased as follows: 6.4%~17.9%, $4.2kgf/cm^2{\sim}96.6kgf/cm^2$ and $40.4kgf/cm^2{\sim}196.2kgf/cm^2$, respectively. But the water absorption decreased from 149.2% to 58.6%.

• Bulletin of the Korean Chemical Society
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• v.31 no.10
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• pp.2955-2960
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• 2010

Spiro-type orange phosphorescent host materials, 9-diphenylphosphine oxide-spiro[fluorene-7,9'-benzofluorene] (OPH-1P) and 5-diphenylphosphine oxide-spiro[fluorene-7,9'-benzofluorene] (OPH-2P) were successfully prepared by a lithiation reaction followed by a phosphination reaction with diphenylphosphinic chloride. The EL characteristics of OPH-1P and OPH-2P as orange host materials doped with iridium(III) bis(2-phenylquinoline)acetylacetonate ($Ir(pq)_2acac$) were evaluated. The electroluminescence spectra of the ITO (150 nm)/DNTPD (60 nm)/NPB (30 nm)/OPH-1P or OPH-2P: $Ir(pq)_2acac$ (30 nm)/BCP (5 nm)/$Alq_3$ (20 nm)/LiF (1 nm)/Al (200 nm) devices show a narrow emission band with a full width at half maximum of 75 nm and $\lambda_{max}$ = 596 nm. The device obtained from OPH-1P doped with 3% $Ir(pq)_2acac$ showed an orange color purity of (0.580, 0.385) and an efficiency of (14 cd/A at 7.0 V). The ability of the OPH-P series to combine a high triple energy with a low operating voltage is attributed to the inductive effect of the P=O moieties and subsequent energy lowering of the LUMO, resulting in the enhancement of both the electron injection and transport in the device. The overall result is a device with an EQE > 8% at high brightness, but operating voltage of less than 6.4 V, as compared to the literature voltages of ~10 V.

• Journal of Applied Biological Chemistry
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• v.54 no.3
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• pp.214-217
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• 2011

Fumigant, methyl bromide which is used in most countries for plant quarantine, has been designated and under control as ozone depleting substance. For developing alternative chemicals for methyl bromide, many countries have been intensifying their capacity. This study was carried out to investigate the residue patterns of hydrogen cyanide which is commonly used for plant quarantine. Hydrogen cyanide was treated onto the orange, banana, and pineapple at recommended and double doses and then sampling was done at 1 and 3 day after fumigation treatment. Residue of hydrogen cyanide was found safe because average residue levels on orange, banana, and pineapple after 3 days of fumigation treatment were $0.57{\pm}0.05$, $0.21{\pm}0.17$, and $0.41{\pm}0.08$ ppm, which were lower than the MRLs of Korea (5 ppm), Japan (5 ppm), USA (50 ppm), and Canada (25 ppm). Hydrogen cyanide are expected to be used as alternative chemicals for methyl bromide fumigant for orange, banana, and pineapple.

• Advances in environmental research
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• v.5 no.3
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• pp.189-200
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• 2016

This study aimed at advanced oxidation of hetero tri-functional reactive dye Acid orange 7 using photo-Fenton conditions in a lab-scale experiment. Decolourisation of Acid Orange 7 dye by Fenton's process was dependent on concentration of Hydrogen peroxide, Ferrous sulphate, pH, and contact time. A $2^3$ factorial design was used to evaluate the effects of these key factors: pH, Fe(II), and $H_2O_2$ concentration, for a dye concentration of 50 mg/L with COD of 340 mg/L at pH 3.0. The response function was removal of colour under optimised conditions; pH 3.0, [Fe(II)] 40.83 mg/L, [$H_2O_2$] 4.97 mmol/L; 13.6 min. of treatment resulting in 100% colour removal. The final COD of treated wastewater was nil suggesting that AOP is a potentially useful process of color removal and dye degradation/mineralisation of effluent having AO7. Minimum contact time for complete decolourisation was at 5 mmol/l $H_2O_2$ concentration. Increase in $FeSO_4$ (mg/l) concentration resulted in decrease of time for complete decolourisation. Box-Behnken Design was used to optimize the process variables. Maximum and minimum levels of pH (3-5), $H_2O_2$ (4-6 mmol/l), $FeSO_4$ (30-46 mg/l) and contact time (5-15 minutes) were used. The statistical analysis revealed a value of 0.88 for coefficient of regression ($R^2$) indicating a good fit of model. Calculated F-value was found higher than the tabulated value confirming to significance of the model. Based on student's t-test, Ferrous sulphate, pH, and contact time have a positive effect on the percent decolourisation of Acid Orange 7.

• Journal of the Korean Society of Food Science and Nutrition
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• v.33 no.10
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• pp.1715-1719
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• 2004

In order to help the preservation of the unshiu orange and pear, antimicrobial paper incorporating grapefruit seed extract and zeolite was applied to pack fruits. Unshiu orange was packed in a box (24${\times}$24${\times}$22 cm) attached with antimicrobial paper and then stored respectively at l$0^{\circ}C$. Pears were wrapped individually before storage at l$0^{\circ}C$. During the storage, weight loss, pH, total acidity, soluble solid content, microbial load and decay were measured as quality indices. Steady pH increase in unshiu orange was observed to slightly decrease total acidity during the storage with little difference between the packaging treatments. The microbial loads of total aerobic bacteria, and yeast/mold counts were suppressed during storage by the antimicrobial paper packaging, which also contributed to reducing the decayed unshiu orange. Limited reduction of total aerobic bacteria and yeast/mold counts was observed only for initial storage period for the pears wrapped with 9 and 12% antimicrobial agent-added papers. Antimicrobial paper was useful for the reduction of microbial load in unshiu orange and pear without other quality deterioration.

• Journal of the Korean Society of Food Science and Nutrition
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• v.34 no.10
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• pp.1593-1598
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• 2005

These studies were carried out to investigate the possibility for utilization of waste articles and the production of function characteristics Pork by feeding unshiu orange byproducts. The samples consisted of the pork not fed with unshiu orange byproduct (TP-0), the pork fed with 3$\%$ and 5$\%$ unshiu orange byproduct during growing and finishing period, respectively (TP-1), and the pork fed with 6$\%$ and 10$\%$ unshiu orange byproduct growing and finishing period, respectively (TP-2). The moisture, crude protein, crude fat and crude ash were not significantly different among samples. It was found that TP-1 had the highest calorie. The cholesterol content was lowest in TP-2 (p < 0.05). It was found that TP-2 had the lowest Na among minerals. Vitamin $B_{1}$ and $B_{2}$ were not significantly different among samples. The total amino acid contents of TP-0, TP-1 and TP-2 were 18.86$\%$, 20.03$\%$ and 20.44$\%$, respectively. Total free amino acid and saturated fatty acid vs. unsaturated fatty acid of Pork loins were not significantly different mong samples. The sensory scores were not influenced by feeding of unshiu orange byproduct.

• Journal of the korean academy of Pediatric Dentistry
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• v.31 no.4
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• pp.617-623
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• 2004

Acidic drink has been known as a cause of tooth erosion. The purpose of this study is to verify the acid levels of orange juices in market and evaluate the erosion effects on the enamel of deciduous teeth by orange juices in relatively short period of time. With four kinds of orange juice selected from market, pH, buffering capacity and concentration of Ca and P ion were measured. And forty segments of normal enamel of deciduous incisors were divided into four groups and level of erosion was measured by surface hardness test before and after soaking at 50ml of orange juice for 10 minutes. The results of this study showed that the average pH of orange juices was 4.0 and this pH value was so acidic as to cause the tooth erosion. There were differences in small quantity for each group of teeth, however, the result was statistically so significant that orange juices can cause enamel erosion in relatively short period of time.

• Journal of the Korean Ceramic Society
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• v.51 no.6
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• pp.570-574
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• 2014

Magnetic-graphene nanosheets have been synthesized via a simple effective chemical precipitation method followed by heat treatment. The composite nanosheets are super paramagnetic at room temperature and can be separated by an external magnetic field. The prepared magnetic-graphene nanosheets were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, and BET surface area analysis. The results demonstrated the successful attachment of iron oxide nanoparticles to graphene nanosheets. It was found that the attached nanoparticles were mainly $Fe_3O_4$. The magnetic-graphene nanosheets showed near complete methyl orange removal within 10 mintues and would be practically usable for methyl orange separation from water.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
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• v.1 no.3
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• pp.44-52
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• 1980

• Korean Journal of Food Science and Technology
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• v.6 no.1
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• pp.1-5
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• 1974

The extraction mode of orange-yellow pigment from Gardenia is depended upon the extraction time, extraction temperature and volume of solvent. The amounts of the extracted-pigment (C) is proportional to the log ${\theta}^{1.15}$ of extraction time $({\theta}:0{\cdots}{\cdots}{\cdots}60$ min.), the log $T^{3.73}$ of extraction temperature $(T:5{\cdots}{\cdots}{\cdots}60^{\circ}C)$ and the log $S^{3.7}$ of volume of solvent $(S:5{\cdots}{\cdots}{\cdots}50ml)$ at $18^{\circ}C$ for 10 minutes. Finally, the general emperical equation was derived as follows; C=1.15 log ${\theta}$+3.73 log T+3.7 log S-7.0