• ALGAE
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• v.31 no.3
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• pp.205-217
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• 2016

Freshwater red tides due to dinoflagellates have caused spectacular and regular “summer reddening” in recent years in Baishihai Lake, a temperate, meromictic, meso- or oligotrophic, high-altitude, landslide-dammed, deep lake located at the eastern edge of Tibetan Plateau in China. Based on morphological and molecular analyses, the causative organism has been identified as a new woloszynskioid dinoflagellate, Tovellia diexiensis Q. Zhang et G. X. Liu sp. nov. The vegetative cells are 20-32 μm long and 16-24 μm wide. They have a hemispherical episome and a broadly rounded hyposome with a short characteristic antapical spine. Usually cells are bright red due to the presence of numerous red-pigmented bodies, which often masked the yellowish green discoid chloroplasts. The amphiesma of motile cells comprise mainly quadrilateral, pentagonal or hexagonal thin plates, arranged in 4-5 latitudinal series on the episome, 1 in the cingulum and 4 on the hyposome. Molecular phylogenies based on small subunit ribosomal DNA and large subunit ribosomal DNA (LSU) indicate T. diexiensis from Baishihai Lake to belong to the family Tovelliaceae, which was monophyletic in our LSU phylogenies. During the bloom-forming period in 2005, cell density of T. diexiensis reached 9.15 × 10⁵ cells L⁻¹. Astaxanthin and its diester were found to be the major pigments in T. diexiensis, resulting in a characteristic blood-red color of the water in Baishihai Lake.

• Korean Journal of Human Ecology
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• v.13 no.1
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• pp.91-96
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• 2004

Effects of irradiation on physical and chemical properties of chicken were investigated. Chicken was irradiated at dose levels of 0, 0.5, 1, 3 and 5 kGy using Co60 source. Irradiation increased drip loss and TBA value. Irradiation decreased L value, and increased a value and b value, indicating that irradiation made chicken darker, more reddish and more yellowish. Irradiation induced the degradation in salt-soluble protein, not water-soluble protein. Any differences in color, odor and tenderness between irradiated and non-irradiated chicken were not perceived by sensory panels.

• Korean Journal of Materials Research
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• v.17 no.3
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• pp.147-151
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• 2007

Cu-free multi-component sol, of which final oxide composition becomes $Bi_{1.9}Pb{0.35}SrCaO,\;Bi_{1.8}Pb_{0.2}SrCaO\;and\;Bi_{1.5}SrCaO$, respectively, was prepared through sol-gel route and coated on a bare Cu substrate. Starting materials were metal-alkoxides as follows.; [$Bi(OC_{2}H_{5})_{3}\;Pb(O^{1}C_{3}H_{7})_{2},\;Sr(O^{i}C_{3}H_{7})_{2},\;Ca(OC_{2}H_{5})_{2}$] as a reagent grade. Transparent light yellowish sol was obtained in the case of $Bi_{1.9}Pb_{0.35}SrCaO\;and\;Bi_{1.8}Pb_{0.2}SrCaO$ composition and $Bi_{1.5}SrCaO$ composition's sol was light greenish. Each sol was repeatedly dip-coated on Cu substrate four times and pre-heated at $400^{\circ}C$ and finally heat-treated in the range of $740{\sim}900^{\circ}C$. In the results, crystalline phases confirmed by XRD were (2201) orthorhombic and monoclinic phases. However, only $Bi_{1.9}Pb_{0.35}SrCaO_{x}$ composition showed pseudo-superconductive behavior after heat-treatment at $900^{\circ}C$ for 12 seconds and then onset temperature was 77 K, even though it did not exhibit zero resistance below Tc.

• Journal of the Mineralogical Society of Korea
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• v.13 no.3
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• pp.147-163
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• 2000

The mineralogy and chemical composition of reddish to brownish yellow residual soils, so called "Hwangto" have been examined according to representative host rocks. The result of the study indicates that Hwangto consists of 40-80% clay minerals and various minerals such as quartz, feldspar, hornblende, goethite, and gibbsite. Clay minerals include kaolinite, halloysite, illite, hydroxy interlayered vermiculite (HIV), mica/vermiculite interstratifield mineral and chlorite. The mineralogical constituents and contents of Hwangto were different depending on the types of host rocks. Moreover, the Jurassic granitic rocks contain relatively more kaolin minerals, whereas the Cretaceous granitic rocks contain more HIV and illite. In addition, reddish Hwangto contains relatively more kaolinite and HIV, and yellowish Hwangto contains more illite and halloysite. It is suggested that feldspars and micas of host rocks were chemically weathered into illite, halloysite, illite/vermiculite interstratified minerals, and HIV, and finally into kaolinite. Compared with their host rocks, the major chemical compositions of Hwangto tend to contain more $Al_2O_3,\;Fe_2O_3,\;H_2O$ in amount and less Ca, Mg, and Na. Hwangto contains relatively high amount of trace elements, P, S, Zr, Sr, Ba, Rb, and Ce including considerable amount of Li, V, Cr, Zn, Co, Ni, Cu, Y, Nb, La, Nd, Pb, Th in excess of 10 ppm. Relatively high amount of most trace elements were detected in the Hwangto. The major and minor chemical compositions of the Hwangto were different depending on the types of host rocks. However, their difference was in the similar range compared with the compositions of host rocks.

• Korean Chemical Engineering Research
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• v.54 no.4
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• pp.519-526
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• 2016

Biomass derived jet fuel is proven as a potential alternative for the currently used fossil oriented energy. The efficient production of jet fuel precursor with special molecular structure is prerequisite in producing biomass derived jet fuel. We synthesized a new jet fuel precursor containing branched $C_{15}$ framework by aldol condensation of furfural (FA) and ethyl levulinate (EL), where the latter of two could be easily produced from lignocellulose by acid catalyzed processes. The highest yield of 56% for target jet fuel precursor could be obtained at the optimal reaction condition (molar ratio of FA/EL of 2, 323 K, 50 min) by using KOH as catalyst. The chemical structure of $C_{15}$ precursor was specified as (3E, 5E)-6-(furan-2-yl)-3-(furan-2-ylmethylene)-4-oxohex-5-enoic acid ($F_2E$). For stabilization, this yellowish solid precursor was hydrogenated at low temperature to obtain C=C bonds saturated product, and the chemical structure was proposed as 4-oxo-6-(tetrahydrofuran-2-yl)-3-(tetrahydrofuran-2-yl)-methyl hexanoic acid ($H-F_2E$). The successful synthesis of the new jet fuel precursors showed the significance that branched jet fuel could be potentially produced from biomass derived FA and EL via fewer steps.

• Journal of the Korean Society of Food Science and Nutrition
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• v.30 no.2
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• pp.261-265
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• 2001

Effects of isomaltooligosaccharides on the characteristics of yackwa were investigated. Yackwa was prepared by replacing honey with 0, 25, 50% isomoltooligosaccharide. Isomaltooligosaccharide decreased reducing sugar contents and increased crude fat contents of yackwa. The exterior color of yackwa prepared with isomoltooligosaccharide showed lighter, less reddish and yellowish. Addition of isomaltooligosaccharides made yackwa lighter, rougher, more brittle and softer as perceived by panels. Yackwa prepared by replacing honey with 25% isomaltooligosaccharide showed good acceptability. The acceptability was significantly correlated with hardness, aroma and greasiness. The textural characteristics including hardness, cohesiveness and gumminess were decreased by replacing honey with isomaltooligosaccharide.

• Journal of Conservation Science
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• v.29 no.2
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• pp.111-125
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• 2013

This study focused on making technique and usage of potteries from Proto-Three Kingdom to Baekje Kingdom in Balanri Site. The potteries were divided into four groups, Jungdo type I, Jungdo type II, Tanalanmun type and the Baekje type on the basis of the shape and physical properties. The Jungdo type potteries were used as kitchen wares, showing mostly yellowish brown color. The Tanalanmun type potteries were used as storages, showing gray green color. Firing temperature of the Jungdo type and the Baekje type potteries were presumed to be fired at 900 to $940^{\circ}C$, whereas the Tanalmun type potteries were fired at around 900 to $1,100^{\circ}C$. This is indicated that the firing condition was adjusted according to the purposes of the potteries. On the one hand, the Balanri potteries were made of paleo-soil which was collected in very near place from the site based on geochemical characteristics of the pottery clays and the soil.

• Textile Coloration and Finishing
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• v.22 no.3
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• pp.194-206
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• 2010

This study was carried out to identify the optimum dyeing conditions for maximum dye uptake of Prunus yedoensis Matsumura flower extract on silk fabric and to investigate hue/tone characteristics and fastness properties of the dyed fabrics. As results, the flower extract was found to contain flavonoids by FT-IR and to show yellowish shade by UV-vis spectrum. Silk fabric was optimized for maximum dye uptake to five repetitions of dyeing at $80^{\circ}C$ for 60 min with an extract concentration of 600% owf in terms of both K/S and color differences. Pre-mordanting was more effective to dye uptake than post-mordanting for all of the mordants used. Un-mordanted and pre-mordanted fabric showed YR(Yellow Red) while most of post-mordanted ones did Y(Yellow). Main tones of dyed fabrics were sf(soft) and lt(light) in the case of unmordanting or Al-mordanting whereas they were d(dull) and g(grayish) by post-mordanting with Cu, Cr, and Fe, respectively. The fastness grades to rub and dry cleaning were reasonably good for most dyeing conditions while those to light were poor. Finally dyeing condition for each hue/tone of the dyed silk with the flower extract was optimized considering fastness properties.

• Journal of Veterinary Clinics
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• v.11 no.2
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• pp.585-592
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• 1994

A consecutive Jiao Chio acupuncture therapy was performed for 3 days in the 45-90 days old 11 calves of which have been shown severe watery diarrhea. The discharge of the infected calves was yellowish brown in color. Two calves of these patients were infected wi pulmonary disease as well as diarrhea. Thus, Su Qi and Fei Yu acupuncture therapy was carried out additionally after dosing with antibiotics twice for The two infected calves. Blood chemical values and serum neutralizing antibody titers were checked, and total blood cell count was also carried out to know the therapeutic effect before and after(21 days) acupuncture therapeutics. The results are as follows ; 1, The diarrhea has ceased one day after begining of the acupuncture therapy in 5 calves, and the cessation of the diarrhea in remaining calves occurred in 1 calf each on 3rd and 4th day, and 2 calves on 6th day, respectively. Two calves infected with pulmonary disease as well diarrhea were cured 8 days after the begining of the therapcutics. 2. Rotaviruses wire detected in the feces of 2 calves, and bovine diarrhea viruses were detected in the 8 calves by the test for serum neutralizing antibody titers, and bovine coronaviruses were also detected in 5 calves. Four calves of the 5 bovine coronavirus infected calves were also infected with bovine diarrhea viruses. 3. Total leucocyte number, total amount of serum protein, and amount of fibringen were slightly increased, while total erythrocyte number, and erythrocyte packed cell volume were slightly decreased. These valucs were statistically not significant. Electrolytes of Na/sup +/, K/sup +/ and Cl/sup -/ were slightly decreased but these values also were not significant. These results indicate that the acupuncture therapeutics arc significantly effective to remove the viral diarrhea in the young calves.

• The Journal of Internal Korean Medicine
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• v.25 no.4
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• pp.252-259
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• 2004

Objectives : Halitosis is a common human condition, exact pathophysiological mechanisms of which are unclear. This study, which investigates halitosis patients' characteristics and their related factors, was done with intent to establish a foundation for the Oriental Medical treatment of halitosis. Methods : 329 patients were surveyed by reviewing medical charts and questionnaires from the East-West Halitosis Clinic of Kyunghee Medical Center from May 1, 2001 to December 31, 2002. Sex, age, illness duration, coating on the tongue, postnasal drip, globus pharyngeus, indigestion, condition of feces, halimeter measurements and results of the salivary scans were analyzed. Results : The thick and yellowish coating on the tongue was not a major cause of halitosis in the patients studied. Among the halitosis patients, 21.6% complained of postnasal drip, 15.6% of globus pharyngeus, 37.4% of indigestion, and 23.8% of diarrhea or constipation, suggesting the possibility of extra-oral origin in oral malodor. Conclusions : This study suggests that, when treating halitosis patients, intra-oral causes of halitosis aside, Oriental Medical treatments such as solving qi-stasis(氣鬱), augmenting deficiency of the spleen qi(碑氣虛) and treating gastric fever(胃熱) constitute effective management for oral malodor patients.