• Journal of Life Science
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• v.28 no.8
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• pp.977-984
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• 2018

This study aimed to enhance rutin contents by controlling germination condition for manufacturing buckwheat sprouts. Two kinds of buckwheat, a common buckwheat (Fagopyrum esculentum Moench) and a tartary buckwheat (Fagopyrum tataricum Gaertner) were used. By comparing the rutin content of two buckwheats, tartary buckwheat was 487 ppm, about 36 times higher than common buckwheat. Both common buckwheat and tartary buckwheat which germinated and grew under the light had higher rutin content relatively. In case of tartary buckwheat, rutin content of over 10 cm sprout was 4,579 ppm (without the light), and 5,160 ppm (with the light). Furthermore, tartary buckwheat was germinated and grew under different light strengths from 2,000 to 22,000 Lux. The rutin contents of tartary buckwheat sprout that was grown under the 22,000 Lux light was the highest. The rutin content was increased dramatically at 14,000 Lux of light. From 14,000 to 22,000 Lux, there was a little change on rutin content. Therefore, the condition of 14,000 Lux light was determined optimal for manufacturing tartary buckwheat sprouts. Also, rutin contents of extracts treated with 60, 70, 80 and $90^{\circ}C$ during different time had no significant difference. Therefore, rutin of tartary buckwheat sprout extract had thermostability up to $90^{\circ}C$.

• Korean Journal of Food Science and Technology
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• v.6 no.2
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• pp.109-115
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• 1974

Milssal is a polished, partially gelatinized pressed wheat grain and it is being consumed in Korea. This study was conducted to establish 2 practical means of providing needed lysine to the Korean population through fortification of Milssal. The results are summarized as follow: Lysine infusion of Milssal was significantly higher than polished wheat grain and affected by such factors as time and concentration of infusion solution. Cooking characteristics including water-uptake ratio and expanded volume were apparently better than polished wheat. After conducting the series of fortification experiments under actual manufacturing conditions. a reasonable process was chosen. In the developed process. lysine HCl solution was sprayed instead of water to the cleaned and debranned wheat grains during the regular wetting process. There was no differences in appearance and taste of Milssal before and after fortification. Fortification of the protein of Milssal with lysine has been found to bring a significant improvement in the growth rate of rats and the protein efficiency ratio. Stability remained relatively high throughout the storage period(90 days at $10{\sim}20^{\circ}C$ or 30 days at $37^{\circ}C$).

• Food Science and Preservation
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• v.15 no.6
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• pp.847-851
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• 2008

The handling and processing of agricultural products in Korea is done manually. Small plastic boxes, nets, and corrugated cardboard boxes are used as containers during harvesting, sorting and other product handling operations. However, these practices are labor-intensive, time-consuming, require various kinds of packing materials, and are expensive because of high operating costs. To overcome these problems, the use of pallet bins with pre-cooling and storage features for handling and processing bulk farm products was investigated. The airflow resistances through bulk potato, onion and mandarin stocks were measured, and the pallet bins and a pressure pre-cooling device were manufactured. The opening ratio, bed depth and airflow rate through bulk potato, onion and mandarin in the pallet bin were defined with regression equations. The cooling rates of bulk potato, onion and mandarin were 0.8C/h ($21.7{\rightarrow}0C$, 14.5 h), 0.4C/h ($15.4{\rightarrow}.0C$, 32.2 h) and 0.7C/h ($13.7{\rightarrow}C$, 18.8 h), respectively, with the pressure pre-cooling system. Temperature deviances for storage of bulk potato, onion and mandarin were 0.12C, 0.12C and 0.17C, respectively.

• Journal of Food Hygiene and Safety
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• v.20 no.4
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• pp.225-231
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• 2005

This study was carried out to observe the stability of riboflavin in dietary supplements. Dietary supplements were in the type of tablet, powder, capsule and liquid. Various factors on the stability of riboflavin such as effect of light, storage temperature and time were examined using HPLC method. Samples were exposed to various temperatures (-9, 4, $30^{\circ}C$) and light at room temperature far 9 months. As well as storage period became longer, reduction rate constant of riboflavin increased. Riboflavin reduction rate constants were higher during storage with light than without light. And there was a significant difference of reduction rate constants in types of dietary supplement. In other words, riboflavin in tablet types was significantly more stable than the others, and liquid type was the most unstable. Therefore, type, light, and packing container of dietary supplements containing riboflavin would be considered in order to establish their appropriate shelf lives. In consideration with riboflavin decrease in dietary supplements, riboflavin would be appropriate for the nutritional labelling guide when predicting them at the end of shelf lives.

• Journal of the Korea Concrete Institute
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• v.17 no.5 s.89
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• pp.769-774
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• 2005

Fluosilicic acid(H2SiF6) is recovered as an aqueous solution which absorbs $SiF_4$ produced from the manufacturing of industrial-graded H3PO4 or HF. Generally, fluosilicates are the salts produced by the reaction of H2SiF6 and metal salts. Addition of fluosilicates to cement endows odd properties through unique chemical reaction with the fresh and hardened cement. This study was performed to know mechanical properties and watertightness using fluosilicates based composite made from fluosilicates and other compounds. Mix proportions for experiments were modulated at 0.45 of water to cement ratio and $0.0-2.0\%$ of adding ratio of fluosilicates based composite. Evaluation for mechanical properties of concrete was conducted to know fresh state of concrete, hardening state of concrete, and watertightness. Evaluation for watertightness of concrete was carried out permeability, absorption test and porosity analysis. In addition. Scanning Electron Microscopy(SEM) and Energy Dispersive X-Ray(EDX) used for investigating micro-structure and atomic component distributed in hardened concrete. It is ascertained that characteristics of mechanical properties and watertightness was more improved than non-added because of packing role of fluosilicates based composite and pozzolanic reaction of soluble $SiO_2$. Also, concrete added fluosilicates based composite had a tendency to delay setting time and only $0.5\%$ addition of fluosilicates based composite delayed 150 minutes compared with non-added.

• Journal of Applied Biological Chemistry
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• v.55 no.4
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• pp.267-272
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• 2012

We investigated that electron beam irradiation is the effective method to control the sprouting of sweetpotato roots without changing of food quality characteristics. In 12 and $25^{\circ}C$ storage after electron beam irradiation, all control samples were sprouted from 6 and 4 weeks after storage, respectively. The sprouting rate of control increased with time and the rate reached to 11.2-12.4 and 70.5-74.2% at 8 weeks after 12 and $25^{\circ}C$ storage. Also, the sprouting of middle and below positioning sweetpotato roots at 12 and $25^{\circ}C$ storage after irradiation reached to 8.6-11.3 and 42.7-48.7% after a storage period of 8 weeks, respectively. However, the sprouting of all sweetpotato roots stored at $4^{\circ}C$ and upper (0-7 cm) positioning samples of box stored at 12 and $25^{\circ}C$ with electron beam was completely inhibited due to increase peroxidase and indole acetic acid (IAA) oxidase activity. Also, all samples with electron beam such as hardness, pH, sugar content, weight loss, and vitamin C and dacarotene content did not differ from that of the control. Therefore, if electron beam will be irradiated to sweetpotato roots above 0.1 kGy before packing, it will effectively inhibit their sprouting stored at $25^{\circ}C$ without the change of food quality characteristics.

• Membrane Journal
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• v.18 no.4
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• pp.325-335
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• 2008

In this study, we used multi-channels ceramic membrane having larger permeate volume per unit time rather than tubular membrane. The hybrid process for advanced drinking water treatment was composed of granular activated carbons (GAC) packing between module inside and outside of multi-channels microfiltration membrane. Instead of natural organic matters (NOM) and fine inorganic particles in natural water source, modified solution was prepared with humic acid and kaolin. Kaolin concentration was fixed at 30mg/L and humic acid was changed as $2{\sim}10\;mg/L$ to inspect effect of organic matters. As a result, both resistance of membrane fouling ($R_f$) and permeate flux (J) were highly influenced by concentration of humic acid. Also, in result of water-back-flushing period (FT) effect, the shorter FT was the more effective to reduce membrane fouling and to enhance permeate flux because of frequent water-back-flushing. However, the optimal FT condition was 8 min when operating costs were considered. Then, the hybrid process using multi-channels ceramic membrane and GAC was applied to lake water treatment. As a result, average treatment efficiencies in our experiment using the hybrid process were 98.02% for turbidity, 75.64% for $UV_{254}$ absorbance, 7.18% for TDS and 84.73% for $COD_{Mn}$.

• Korean Chemical Engineering Research
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• v.46 no.2
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• pp.414-422
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• 2008

Adsorption experiments for $H_2$, $CH_4$, CO, $CO_2$ on activated carbon and zeolite 5A were performed by static volumetric method. A 4-bed pressure swing adsorption (PSA) process was to study separation of hydrogen from multi-component mixture gases ($H_2$ 72.2%, $CH_4$ 4.06%, CO 2.03%, $CO_2$ 21.6%). Dual-site langmuir (DSL) isotherm showed good or fair agreement with the experimental results. The optimum height of activated carbon layer was 55 cm with breakthrough results on the packing ratio of activated carbon to zeolite 5A. In PSA process, the effects of the process parameters such as total cycle time ($T_c$), ${\Delta}P$ at the provide purge step and adsorption pressure on the PSA performance were studied experimentally and theoretically.

• Journal of the Korean Ceramic Society
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• v.39 no.2
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• pp.145-152
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• 2002

Four commercial alumina powders having different particle size of $0.5{\mu}m,\;2.8{\mu}m,\;12{\mu}m,\;and\;45{\mu}m$ were presintered at 1120$^{\circ}C$ for 2h and then lanthanum aluminosilicate glass was infiltrated at 1100$^{\circ}C$ for 2h in the interval of 0.1h to investigate the penetration kinetic of the glass into the alumina preforms. The infiltration distance is parabolic with respect to time as described by the Washburn equation and the penetration rate constant, K, increases with raising the alumina particle size. The strength of glass-alumina composites increases as the alumina particle size reaches to 2.8${\mu}m$ due to the increase in packing, however, decreases with further increasing the alumina particle size. The fracture toughness of the composites rises with increasing the alumina particle size due to the crack bowing and the interaction between crack and alumina particles.

• International Commerce and Information Review
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• v.16 no.5
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• pp.87-114
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• 2014

The Uniform Customs and Practice for Documentary Credits (UCP) is a set of rules on the issuance and use of letters of credit. Historically, the commercial parties, particularly banks, have developed the techniques and methods for handling letters of credit in international trade finance. This practice has been standardized by the ICC (International Chamber of Commerce) by publishing the UCP in 1933 and subsequently updating it throughout the years. The ICC has developed and moulded the UCP by regular revisions, the current version being the UCP600. This latest version, called the UCP600, formally commenced on 1 July 2007. During the revision process, notice was taken of the considerable work that had been completed in creating the International Standard Banking Practice for the Examination of Documents under Documentary Credits (ISBP), ICC Publication 745. This publication has evolved into a necessary companion to the UCP for determining compliance of documents with the terms of letters of credit. It is the expectation of the Drafting Group and the Banking Commission that the application of the principles contained in the ISBP, including subsequent revisions thereof, will continue during the time UCP 600 is in force. This paper focuses on documents including various certificates, Packing List, Weight List, Beneficiary's Certificate, Analysiis, Inspection, Health, Phytosanitary, Quantity and Quality Certificates, Courier Receipts, Shipping Advice etc. and suggests some implications in the field.