• Economic and Environmental Geology
• /
• v.45 no.5
• /
• pp.565-578
• /
• 2012

Sedimentary facies of the Middle to Upper Cambrian Sesong Formation, Taebacksan Basin, are analyzed using detailed field mapping and stratigraphic section measuring. As a result, five sedimentary facies are recognized in the formation, which include lime nodule bearing shale facies, anastomosing wackestone-packstone facies, well-laminated siltstone facies, fine to medium sandstone facies and lime pebble conglomerate facies. Together with sedimentary facies analysis, study on vertical facies variation indicates that the Sesong Formation was deposited in an outer to inner shelf during relative sea-level fall. Especially, shallow marine aspects of the upper part of the Sesong Formation including 10-m-thick, fine to medium-grained sandstones appear to be very similar with the shallow marine strata accumulated during the Steptoean Stage (Dunderbergia) in Laurentia. These lithofacies comparisons of coeval strata between two continents suggest that sedimentation in the Sesong Formation reflects the influence of global sea-level fall occurred during the late Middle Cambrian to early Late Cambrian. As well, a stratigraphic discontinuity surface that may have sequence stratigraphic significance is recognized within the shallow marine sandstone beds of the uppermost Sesong Formation. This stratigraphic discontinuity surface may correspond to the Sauk II-III sequence boundary in Laurentia. Therefore, results delineated in this study will use a new stratigraphic paradigm for regional correlation of the Middle to Late Cambrian strata (e.g., the Sesong Formation) in the Taebacksan Basin, and will provide very useful information on intercontinental stratigraphic correlation in the future.

• Journal of Korean Society of Water and Wastewater
• /
• v.24 no.3
• /
• pp.351-359
• /
• 2010

Recently, there have been flood damages due to the climate change and the flash flood continuously in Korea and there are several flood disaster mitigation plans that are normally most of management plan for water related disasters even though drought disasters are as important as flood disasters. In this study, it is underlined that the research on solution of water shortness due to the drought disasters is currently required since the frequency of drought damage is not very many but continuously increasing. There was big drought damage in TaeBaek City of Kangwon province due to the serious lack of water during autumn, 2008 to spring, 2009. This study therefore analyses the characteristics of hydrometeorological conditions by rainfall frequency analysis and the operations of Gwangdong dam that is a source of multi-regional water supply by analysing water demand. As results of study, there was a drought with 20 years returning period which is not really available to fill the reservoir as usual and which could only filled 52% of reservoir. The rainfall during the dry season was less than normal, however, the water demand from the TaeBaek City was higher than normal. As researching several reasons of water shortness including the reasons described above, this study might be useful for drought mitigation plan.

• The Korean Journal of Ecology
• /
• v.22 no.3
• /
• pp.119-129
• /
• 1999

The bryophyte communities on the forest floor of the mixed coniferous and deciduous broad-leaf forest and the evergreen coniferous forest of cool temperate and subalpine zones in Mts. Taebaek, Odae and Sulak of Tabaek Range were investigated from. the numerical and phytosociological viewpoints. As a result, four bryophyte communities were recognized there, considering the species composition of vascular vegetation; A. Thuja koraiensis-Abies nephrolepis/Taxus caespitosa-Pinus pumila/Hylocomium splendens-Pleurozium schreberi community, B: Sasamorpha borealis-Abies nephrolepis/Plagiomnium cuspidatum- Aulacomnium heterostichum community, C. Abies holophylla-Abies nephrolepis/Thuidium recognitum-Trachycystis immarginata cristatus community, D. Meehania urticifolia-Abies nephrolepis/Hylocomiopsis ovicarpa-Taxiphyllum aomoriense community. Among these, the community A was distributed in higher altitudes and characterized by the species group of the holarctic elements, e.g. Hylocomium splendens, Pleurozium schreberi, Dicranum majus, etc. limited in subarctic; subalpine and arctic; alpine zones and was confirmed as synusies of the Thujo-Abietetum nephrolepidis Song 1991 and Taxo-Pinetum pumilae Song 1985 belonging the Vaccinio-Piceetea Br.-Bl. 1939. In contrast the communities B, C and D were distributed in the mixed coniferous and deciduous broad-leaf forest of lower altitudes and characterized by the elements of the cool temperate; montane zone. They were confirmed as synusies belonging to the Corylo-Quercetum mongolicae Song 1988. By the result of the numerical syntaxonomical analysis such as cluster analysis, interspecific association, PCA, the communities were largely divided into the two types. The two types coincided with the community units or the diagnostic species of the bryophyte communities of the subalpine zone and the montane zone, respectively. Also the analysis revealed that the division of the above two forest zones are justifiable. Up to date many investigator have described the coniferous forest distibuted above 1000m in Taebaek mountains as the forest vegetation of subalpine zone. However, from the results of the present study, the boundary of the mixed forest and the true subalpine coniferous forest was elucidated to be ca. 1,500 m phytosociologically. Species richness was the highest in the community A, and the other four communities showed a similar species richness.

• Korean journal of food and cookery science
• /
• v.6 no.4 s.13
• /
• pp.33-39
• /
• 1990

Rice and waxy rice starches were adjusted to 27% of moisture and heated at $100^{\circ}C$ for 16hours, respectively. After the treatment, their gelatinization properties were investigated. The initial gelatinization temperature, obtained by transmittance and amylogram, of Akkibare and Taebaek starches were $60{\sim}65^{\circ}C$ but those of waxy rice and the U.S.A. rice starches were $55{\sim}60^{\circ}C$ and $70{\sim}75^{\circ}C$, respectively. The gelatinization temperatures of heat-moisture treated starches were higher than those of the untreated starches. Viscosities at each temperature and the highest viscosity reduced by some degrees after the treatment. DSC thermograms of all starches showed single endotherm and the gelatinization enthalpies were $2.26{\sim}2.63\;cal/g$. The gelatinization enthalpy tended to decrease after the treatment. Transmittance and viscosity by alkali showed in this order; Akkibare and Taebaek starches>waxy starch>the U.S.A. rice starch. The heat-moisture treated starches increased viscosities in every starch. Transmittance in alkali solution of Akkibare, Taebaek and waxy rice starches decreased. but that of the U.S.A. rice search increased.

• Korean Journal of Food Science and Technology
• /
• v.32 no.3
• /
• pp.681-690
• /
• 2000

For scientification of commercial fermented radish products the study on physicochemical and processing properties of various radish cultivars should be proceeded and needed. Moisture contents of 3 parts of root ranged from 91.3 to 94.0%. Although, the upper part showed less content of moisture and ash than other parts, the upper part contained higher amount of crude protein and soluble solids. The sugar contents of Baekkwang grown on spring was the lowest$(5.0^{\circ}Brix)$ and that of Taebaek grown on autumn was the highest $(6.6^{\circ}Brix)$ among 6 cultivars. Significant difference of acidity was shown in various cultivars but not in each parts. The most abundant soluble sugars in radish root was glucose ranging from 15.8 to $27.3\;{\mu}mole/g\;f.w.$ fresh weight, f.w. and followed by fructose ranging from 16.4 to $23.1\;{\mu}mole/g\;f.w.$ However, the content of sucrose ranging from 0.7 to $2.7\;{\mu}mole/g\;f.w.$ was the lowest compared to others. Hardness of fresh root was the highest in Taebaek $[93.4{\sim}156.9N/m^2(\times10^3)]$, followed by Dongja and Chudong, and the lowest in Baekkwang. Changes in rigidity of roots during brining were determined. Although the rigidity was drastically reduced during initial 60 min., it was reversely increased during further storage. Sensory acceptabilities of Taebaek and Dongja were the best among 7 cultivars. Optimal time of radish fermentation at pH of 4.2 and acidity of 0.6% was between 24 and 28 days of storage.

• Applied Biological Chemistry
• /
• v.30 no.2
• /
• pp.118-125
• /
• 1987

Three rice varieties of Akibare (japonica), Milyang 30 (indica) and Taebaeg (indica) were investigated for their changes in sensory and physical qualities of cooked rices during storage at the temperature range of $4^{\circ}C$ and $70^{\circ}C$ for 25 hours, The qualities studied were sensory attributes of texture which were evaluated by multiple comparison method and physical characteristics of texture measured using with rheometer. Physical Properties of hardness, adhesiveness and elasticity of cooked rices were found to be different among the rice varieties and were affected by storage conditions. Higher values in hardness and elasticity and lower values in adhesiveness were measured for cooked rices of Akibare immidiately after cooking. Those physical values were changed by a steady decrease in hardness and elasticity and increase in adhesiveness during storage for 25 hours. Correlations between sensory and physical characteristics of texture was found a significant relationships between gumminess and hardness (r=0.696), gumminess and adhesiveness (r=-0.800) and gumminess and elasticity (r=0.806).

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.27 no.3
• /
• pp.229-234
• /
• 1982

Environmental factors are known in general to influence much on the development of abscission layer and thereby on shedding of plant parts. The present study was carried out to determine the effect of meterological condition during ripening on the grain shatterability of rice plants at harvest. Different meteorological conditions were obtained by shifting transplanting timing of 40 days old rice seedlings 4 times with a 15 days-interval. Grain shatterability was measured as tensile strength of rice grains: it varied within a range of 214g. to 251g. in a practically non-shattering Japonica variety'Jinheung' and l27.5g. to 204g. in an easy shattering Indica \times Japonica progeny variety'Taeback'. In view of field loss of rice, the variation in tensile strength with time of transplanting and harvest did not matter in Jinheung, but was an important factor in Taeback. In Taeback the tensile strength was significantly correlated positively with mean, maximum and minimum air temperature and relative humidity during a certain period of grain ripening, especially during 30 days period before harvest, but diurnal range of air temperature showed a significant, negative correlation with it. The tensile strength seemed to be more closely related with min. air temperature than max. air temperature, and it was not significantly correlated with radiation amount during any period of pre-harvest. Meteorological effect on grain shatterability may vary with variety, but temperature regime during ripening appears to play major role among the meteorological factors in easy shattering and more thermophilic Indica \times Japonica varieties: lower the temperature, greater the shatterability.

• Proceedings of the Speleological Society Conference
• /
• 1993.07a
• /
• pp.76-88
• /
• 1993

1962년 대한지질학회에서 조사 발표한 태백산지구지질단 제4쪽과 제8쪽에 의하면 동해시 부근의 지질은 ［그림 1］과 같다. 이 지질도 남반부에 천곡동 동굴지대가 포함되어 있는데 동해시 일대의 지질은 조선계층군의 중부와 평안계층군의 대부분, 이들에 관입한 편마상화강암과 우질화강암을 주로하고 이들을 부정합으로 덮은 홍적층(단구층), 중적층으로 이루어져 있다.(중략)

• Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
• /
• 2010.04a
• /
• pp.335-339
• /
• 2010

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 1999.10a
• /
• pp.154-155
• /
• 1999

동해 지역은 험준한 태백산맥을 경계로 동해안 연안에 위치하고 있으며 공업항만의 발달로 지방 산업의 발전이 가속화되고 있다. 특히 다량의 연료를 사용하는 대기배출시설인 시멘트공장 3개소와 화력발전소 1개소가 밀집되어 대기질 악화가 우려되고 있으며, 주요 배출물질로는 먼지, 질소산화물, 일산화탄소 등이 있다.(중략)