• Proceedings of the Korean Society of Organic Agriculture Conference
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• 2009.12a
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• pp.308-308
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• 2009

유기농액비 자가제조 방법의 표준화를 위해 농가 현황조사를 통해 유기농액비 제조방법을 분류하고 제조 시기별 성분함량 변동상을 분석하였다. 조사대상 액비는 경기 9, 강원 5, 충북, 1, 충남 20, 전남 6, 경북 5, 경남 8 등 총 54종이었다. 자가제조 유기농액비에 사용된 재료는 감, 매실, 복숭아, 사과, 참다래, 토마토, 파프리카, 양파, 파, 인삼, 미나리, 민들레, 쇠비름, 쑥, 익모초, 산야초, 황기, 환삼덩굴, 으름열매, 은행과피, 배 어린 열매, 감껍질, 깻묵, 들깨대, 물미역, 쌀뜨물, 쌀겨, 꽁치, 바다생선 (잡어), 불가사리, 생선부산물(내장, 뼈 등), 액젓부산물(해산물의 뼈가 많이 함유된 물질), 동물뼈(돼지, 닭 등), 골분, 혈분, 천매암, 천일염, 계란껍질, 조개껍질, 게껍질, 새우껍질, 굴껍질, 농가부산물, 음식부산물, 구아노, 들깨 대 숯, 참깨 대 숯 등이었다. 제조방법은 기본재료+물, 기본재료+물+미생물, 기본재료+당밀, 기본재료+당밀+미생물, 기본재료+흑설탕, 기본재료+흑설탕+미생물 등이었다. 유기농액비의 화학적 특성은 다양하였으며, 혈분을 주 원료로 한 유기농액비의 화학성변화는 시간의 경과함에 따라 pH는 4.99에서 3.85로 낮아졌지만, EC, T-C, T-N, $P_2O_5$, $K_2O$, CaO, MgO, $Na_2O$, Fe, Mn, Zn 등은 높아졌다.

• 발명특허
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• v.30 no.8 s.350
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• pp.48-51
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• 2005

"하루 세 번, 3분씩"닦아야 건강한 치아를 가질 수 있다. 어릴 적부터 무수히 훈련을 받아온 이야기다. 음식문화가 다양해지고 건강을 우선시하는 현대인들에게 치아 세정이 당연한 관심사임은 물론, 고대로부터의 치아 세정에 관한 기록들은 쉽게 찾아볼 수 있다. 우선 지금의 치약과 같은 역할을 하는 것들에 대한 기록은 고대 이집트의 의학서인 파피루스에서도 찾아볼 수 있는데, 기원전 고대인들은 식물성 수지 등을 씹거나 재와 태운 달걀 또는 미세한 돌가루 등을 꿀과 같이 반죽해 치아를 닦았고, 중세에는 동물의 뼈나 조개껍질 가루 등을 꿀과 반죽해 사용했다는 기록이 남아있다.

• Conservation Science in Museum
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• v.22
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• pp.1-14
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• 2019

The excavation of the south mound of Hwangnamdaechong Tomb in Gyeongju has yielded diverse types of shell artifacts. Among the them, this paper investigated fragments of shell ornaments with gilt-bronze frames, the use of which has not been identified. It was revealed that the artifacts are in fact nautilus cups, which had never been found previously in excavations in Korea. A nautilus is a species marine mollusk known to be the closest to prehistoric ammonites. It has brown stripes on the surface of the shell and septa inside, and a siphuncle penetrating to the center of the septa. It is known that nautilus cups were made and used in China, but only three examples have thus far been identified. These surviving cups have metal ornaments and are dated to the Western and Eastern Jin periods of China. No nautilus cups have been found in Japan, and the shell ornaments investigated in this study were determined to be the first nautilus cups ever found in Korea. Nautilus cups are mentioned in ancient documents and literature, including in poems by the Tang Dynasty poet Li Bai and in Joseon-period documents. This paper presents the biological characteristics of nautili, cases of excavation of nautilus cups outside Korea, and findings from the basic research of the nautilus cup from Hwangnamdaechong Tomb.

• Proceedings of the Korean Geotechical Society Conference
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• 2005.03a
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• pp.1005-1012
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• 2005

Shell-sand mixtures are commonly used for reclamation projects. This study presented the engineering properties of shell-sand mixtures. Shell shows higher specific gravities and less compressibilities than quartz sand. From large shear box tests, it can be seen that the shear strength increased with the increase of shell mixtures. At 30% shell mixtures showed about 6 increase in shear friction angle.

• KOMUNHWA
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• no.61
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• pp.3-44
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• 2003

The plane structure of dwelling in korean peninsula has been transformed orderly as for shapes of round, square and rectangular in general. The exit and entrance structure take styles of stairs and when they are jotted out, take the slant stairs from the

• Journal of Aquaculture
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• v.16 no.1
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• pp.24-30
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• 2003

Studies of the seed production of Urechis unicinctus were conducted under the laboratory conditions to obtain some information for the U.unicinitus culture. The experiment included developmental studies of the egg development, larval culture, sediment preference and growth of young U.unicinctus. The experiment were conducted from March to August, 2000. The adults of U.unicinctus collected in Namhae-do, Korea. The developments of the fertilized eggs were observed under a light-microscope at intervals of one hour after containing with density of one individual per 1 $m\ell$. The larvae were fed with Phaeodactylum tricornutum cultured at the laboratory. The concentration of the phytoplankton for the feed was 30,000 cells per individual larva. With progress of development, the food concentration was gradually increased, up to 10,000 cells per individual for the young U.unicinctus. Trochophore larvae appeared on the 68 hours after hatching. On the 32 days after hatching, over 50% of fertilized eggs developed into young U.unicinctus. In order to investigate the effect of sediment on the growth and burrowing of U.unicinctus, the young worms were reared in tanks with different grain sizes. The highest value of sediment preference and survival rate of U.unicinctus was shown in the mixture sediment group with below 0.10 mm, 1.01∼12.00 mm, over 3.01 mm and shell. The lowest value in both sediment preference and survival rate of U.unicinctus was observed in 1.0l∼2.00 mm grain size.

• Proceedings of the Korea Concrete Institute Conference
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• 2008.11a
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• pp.33-36
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• 2008

It is generally known that a shell in the form of layered structures stacked up thin elements by organic adhesives has high resistance capacity against static and impact loading. The complex materials such as these diversified layered structures are more reliable and efficient to the impact loading than the single material. In this study, the segmented composites in the shape of a beam were made, using mortar and concrete block and tested under static and impact loading in order to develop the complex materials in the form of layered structures as the segmented composites to resist impact loading. And it compared to the normal concrete beams having the same compressive strength to evaluate the differences in their performance and failure modes.

• Proceedings of the KOR-BRONCHOESO Conference
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• 1991.06a
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• pp.35-35
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• 1991

식도이물은 대부분 상부식도에 위치하며 식도경술로 제거가 용이하지만 식도 점막내 매복된 이물이나, 식도경술의 합병증으로 인한 천공에 의하여 위급한 종격동염을 유발하는 경우가 있다. 이러한 종격동염은 하부식도에 위치한 이물 특히, 날카롭거나 표면이 불규칙하며 큰 경우에 유발하기 쉬우므로 초기에 개흉술을 통한 제거 또는 배농술 등의 적극적인 치료가 필요하다. 저자들은 1980년부터 1990년까지 10년간 본원에서 식도이물 제거술후 종격동염이 발생되어 개흉술 또는 배농술을 시행 받은 4례(틀니 1례, 칫솔 1례, 조개 껍질 1례, 생선 가시 1례)를 문헌고찰과 함께 보고하는 바이다.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.33 no.6
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• pp.572-580
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• 2000

Community structure of macrobenthos was studied in Chinhae Bay, a southern coastal area of Korea. Sampling was conducted bimonthly using a Smith-McIntyre grab ($0.05 m^2$) at eight stations from January to November, 1998. A total of 237 species were sampled. It was comprised of annelids ($80 spp. 33.8{\%}$), arthropods (80 spp.), molluscs (47 spp.), echinoderms (16 spp,) and others, Mean density of individual was $1,939 ind./m^2$ and mean biomass was $171.6 gwwt/m^2$. Annelids were a density-dominant faunal group with a mean density of $1,533 ind./m^2$ which occupied $79.0{\%}$ of the total individual of benthic animals. Molluscs were represented as a biomass-dominant group with a mean biomass of $95.9 gwwt/m^2$ ($55.9{\%}$ of total biomass). The major density-dominant species were a bivalve Theora fratilis ($110 ind./m^2$) and five species of polychaetes, Lumbrineris longifolia ($417 ind./m^2$), Chaetozone setosa ($145 ind./m^2$), Sigambra tentaculata ($128 ind./m^2$), Cirratulus cirratus ($128 ind./m^2$), and Paraprionospio pinnata ($103 ind./m^2$). Cluster analysis showed that the study area could be divided into two station groups and two stations. According to the feeding guild of polychaetes, four feeding guilds were found, and the major ones were surface deposit-feeders, burrowing deposit-feeders, surface suspension-feeders, carnivore.

• Korean Chemical Engineering Research
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• v.57 no.2
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• pp.205-209
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• 2019

The exquisite structure and attractive biological properties of biominerals have great potential and increased interest for use in a wide range of medical and industrial applications. Calcium carbonate biomineralization, mainly controlled by shell matrix proteins, has been used as a representative model to understand the biomineralization mechanism. In this study, in vitro calcium carbonate crystallization was carried out under room temperature and atmospheric pressure using recombinant shell matrix protein GRP_BA and artificial shell matrix protein GG1234. Both proteins inhibited the growth of typical rhombohedral calcite crystals in the calcium carbonate crystallization using $CaCl_2$ solution and $(NH_4)_2CO_3$ vapor, and spherulitic calcite crystals with rosette-like structures were synthesized in both the presence of GRP_BA and GG1234. These results might be caused by the properties of block-like domain structure and intrinsically disordered proteins. We expect that this study can contribute to enhance understanding of the calcium carbonate biomineralization controlled by shell matrix proteins.