• Korean Journal of Environmental Agriculture
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• v.25 no.4
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• pp.352-358
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• 2006

We investigated the mechanism on occurring of briny injury in four fruit species (apple, pear, grape, peach). Briny injury of apple, pear, peach, and grape was induced by the foliar splay of saline solutions. Browning symptom was initiated one hour after the spray of 3% NaCl in apple, pearl and peach trees. while two hour were needed for grape, but the latter developed the symptom faster than the formers. Foliar spray of 3% NaCl resulted in 4-fold increase in ethylene production 24 h after the spray, and the production was returned to early stage rate after 72 h. Ethylene production of control was nearly constant with slight decrease after 4 h. Browning and defoliation response to the spray of 3% NaCl on lower side were not different from the spray on both sides regardless of fruit species, while no injury symptoms occurred by the spiny on upper side. In saline damage for treated date, lateral bud was only germinated in apple at 30 July. A shoot apex was 100% grew in all fruit tree. In result for hormonal content of leaf and shoot apex, control was high t-zeatin content in leaf. However, IAA and ABA content was increasing in high saline concentration.

• Proceedings of the KSCN Conference
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• 2004.05a
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• pp.418.2-419
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• 2004

위암에 의한 사망률은 점차 감소하고 있는 추세임에도 불구하고 전체 암 발생에서 위암은 높은 비율을 차지하고 있다. 위암의 원인은 아직 정확히 밝혀지지 않고 있으나 주요 요인으로 음식 내의 첨가물, aflatoxin, nitrosamine, 인공감미료, 식용색소, BHT 등이 주목받고 있다. 또한 나트륨 함량이 높은 염장식품의 과잉섭취와 위암과 관련이 있음이 보고된 바 있다. 현재까지 위암과 연관된 식이 요인에 관한 연구는 많이 있으나 대부분이 외국에서 이루어진 것이며, 식이형태가 매우 다른 우리나라 위암환자를 대상으로 한 연구는 매우 미흡한 실정이다.(중략)

• Korean Journal of Soil Science and Fertilizer
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• v.45 no.3
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• pp.404-409
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• 2012

In order to obtain optimum mixing conditions with animal cadaver residue and sawdust for composting using rendering treatment method for agricultural recycling, changes of chemical characteristics and compost quality after composting were investigated. Initial mixing ratios with animal cadaver residue and sawdust were adjusted 100 : 0, 50 : 50 and 30 : 70. Temperature, pH, contents of ammonia and carbon dioxide were rapidly increased in 3 days and then decreased with time. Organic matter content was similar in all conditions. In mixing ratio of 50 : 50, the compost quality was satisfied with compost depending on official standard for product fertilizer. Thus, the optimum mixing ratio of animal cadaver residue and sawdust were 50 : 50.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.20 no.2
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• pp.78-91
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• 2015

Macrobenthic community was studied at 87 stations including intertidal and subtidal area in Yoja Bay, south coast of Korea in summer season of July 2001. Duplicate sediment samples were taken using a van Veen grab ($0.1m^2$) in each station. Mud facies of the sediments were widly distributed in the bay. And relatively high content of sand was shown in the Bulgyo-cheon stream estuary. A total of 274 species was occurred with a mean density of $2,346ind./m^2$ and a mean biomass of $78.2g/m^2$. The polychaetes were species- and density-dominant faunal group with a total of 122 species (44.5% of the total number of species), and mean density of $1,543ind./m^2$ (65.8% of the mean density). Meanwhile, molluscs were biomass-dominant faunal group with $44.4g/m^2$. Bio-Env. analysis showed that the combination of bottom salinity and sand content of the surface sediments was highly correlated to the major macrobenthic communities. The macrobenthic species number, decreasing toward inner bay from mouth of the bay, was significantly correlated to the sediment environmental variables and bottom water salinity. The spatial distribution of abundance showed significant correlation to the sand and mud contents and mean grain size of the surface sediments. Major dominant species were Minuspio japonica (polychaete) with a mean density of $1,167ind./m^2$ at upper part of the bay where salinity was low and Eriopisella sechellensis (amphipod) with $152ind./m^2$ in central part of the bay. Species diversity (H') was $3.0{\leq}$ in the mouth part of the bay and ranged 2.0-3.0 in the inner part of the bay, which showed a significant positive correlation to bottom salinity. Total number of species also showed significant correlations to the sediment composition and bottom salinity. Based on the cluster analysis the macrobenthic community of the bay was classified into five station groups from the bay mouth toward the inner part of the bay depending on the species composition. From the SIMPER analysis Minuspio japonica, Eriopisella sechellensis and Sternaspis scutata mainly contributed to the classification of station group. These results suggested that the macrobenthic communities of the bay were mainly influenced by bottom salinity together with sediment composition, and that the studies of spatial distributions of major dominant species and benthic communities should be conducted continuously to monitor the Yeoja Bay benthic environment.

• Journal of the Korean Geographical Society
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• v.36 no.4
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• pp.474-482
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• 2001

The purpose of this study is to investigate the formation and development processes of beach resort by fabric construction in a island environment. The results are as follows. (1) The research area(Tong-ri beach, Bokil-myon, Chollanam-do)has been transformed to belch by sedimentary environmental change since latter half of 1800's. (2) The mean slope of beach face is 0.96°, and the difference of attitude between beach and mud flat face is 75cm. (3) The mean particle size of beach surface sediment is 3.53$\Phi$. This value is very finer than that of any other beach in Korea peninsula. But its value is coarser than that of mud flat surface sediment. (4) The particle size distribution of core sediment is become changed to fine particle in 70cm depth. This value is corresponded to difference of altitude between beach face and mud flat face. (5) The analysis of aerial photographs after 1970 indicates that sedimentation process was not brisked since 1970's. Consequently, the research ares has been developed by sedimentary environmental change for sea-level rise effect and wave height energy rise effect.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.20 no.3
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• pp.237-247
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• 1987

The present study deals with the physico-chemical and meteorological conditions in Porphyra-cultivation ground to determine the relationship between laver production and its environmental factors in Kwangyang Bay from January to April in 1986. As a result, major environmental factors which are thought to have a great influence upon the poor harvest during the cultivation period are as follows; 1) the excessive rainfall in the beginning of cultivation period 2) the accumulation of suspended matters on the thallus of laver 3) the decrease of current velocity and the stagnation of the water in the cultivation ground.

• Korean Journal of Soil Science and Fertilizer
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• v.24 no.4
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• pp.265-271
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• 1991

This study was crried out in order to changes of soil salinity in the Kyehwa saline paddy soil from 1978 find out the to 1988. Surveyed soil was Munpo, Gwanghwal, Yeompo, Hasa series and distribution ratio of those area was 51.2%, 16.6 %, 30.2 %, 1.0 % respectively on the 2,500ha. In the cultivated field, the ratio of desalinization was increased in accordance with rice cultivating years but desalization was not conduct after six years in the uncultivated field. Soil salinity of Summer(during cultivation) and Fall(after cultivation) were 52.3 %, 62.5 % respectively as compare with Spring(before cultivating) and about changes of soil salinity according to different soil depth, underground layer 20-40cm and 40-60cm were raised the rate 28.4 % and 66.2 % in accordance with top soil.

• Journal of the Korea Organic Resources Recycling Association
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• v.9 no.3
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• pp.127-135
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• 2001

Achieved to grasp possibility to use compost that make food waste and sawdust (bulking agent) by raw material in this research droopingly to bulking agent calamity. To be kept by aerobic experiment method to 4 composting device that air is supplied Food Waste + Sawdust, Livestock Feces + Sawdust, Food Waste + Compost, Livestock Feces + Compost free medical care and investigated composting sledding and temperature, pH, the moisture rate, heavy metals item etc. Judged that food waste of the moisture rate mix experiment result food waste input (food waste and sawdust composting done material mean) compost happened after resources anger as bulking agent food waste and Livestock Feces quantity is 72~77%, because axis dries to promote optimum composting progress appearing by 64~65%, thing which use need and was difficult to set salt 1% that is by-product compost standard when use compost as bulking agent of food waste but by dilution effect of Livestock Feces quantity using compost being expose that preservation is available by standard low because salt content density of done compost becomes found possibility that can solve salt content problem.

• Korean Journal of Environmental Agriculture
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• v.11 no.1
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• pp.26-40
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• 1992

Cheju Island formed by Quarternary volcanism provides highly permeable hydrogeological environment. To meet the increasing demand of water in the island, many groundwater wells have been developed. The environmental isotopes(oxygen-18, deuterium, tritium) and chemical analysis of water samples from the eastern part of the island were carried out to ascertain whether groundwater in the eastern part of the island was contaminated by sea water. The result of tritium analysis indicated fast infiltration of meteoric water into underground and rapid mixing process between rain water and groundwater. The results of oxygen-18 and deuterium analysis demonstrated that most of the wells in the eastern part of the island were influenced by sea water intrusion. Chemical analysis of water samples revealed that most groundwater in study area were classified into Na-Cl type and showed high chloride/bicarbonate ratios. Sea water intrusion in the northeastern part of the island has proceeded at least 3 km within the coastaline, and in the south eastern part about 700m.

• Journal of the Korea Organic Resources Recycling Association
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• v.23 no.2
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• pp.61-66
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• 2015

In this study, manufacture of kitchen garden soil and its application on the growth of Lettuce has been performed. The optimal ratio of various raw materials for pH, total nitrogen, phosphate, cations, and salt content was found to be 49 : 35 : 10 : 5 : 1(w/w) in peatmoss, livestock manure, cocopeat, zeolite, and microbial fertilizer, respectively. In the growth experiment using Lettuce, the manufactured soil obtained 21% & 20% increase in leaf length and width, 17% increase in chlorophyll, and 22% in biomass, compared to the control.