• Ecology and Resilient Infrastructure
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• v.5 no.3
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• pp.180-188
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• 2018

Biopolymer based on microbial ${\beta}$-glucan and xanthan gum is a rising geotechnical material that can enhance the cohesion between soil particles and consequently reduce soil erosion. Recently, biopolymer is proposed to utilize for the riverbank strengthening. As an effort of the ecological assessment of biopolymer application in civil engineering, this study examined the effects of biopolymer on seed germination and growth of nine plant species inhabiting in the Korean riverside. Responses of above-ground growth to the biopolymer differed among plant species. One species grew less but others maintained their growth when plants were grown in the soil with biopolymer. In contrast, root grew more vigorously and root/shoot ratio decreased in the biopolymer across testing plant species. These results indicate that biopolymer application on the river bank likely stimulate root growth of native plant species, which, in turn, possibly reinforces riverbank. Species specific responses of above-ground growth implies that ecological effects of biopolymer application would depend on the species composition of the ecosystem.

• The Journal of Korean Orthopaedic Ultrasound Society
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• v.1 no.1
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• pp.1-5
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• 2008

Purpose: We studied the diagnostic value of dynamic US in the extensor tendon dislocation at the metacarpophalangeal joint. Materials and Methods: From January 2007 to October, we studied 6 cases that had been diagnosed and followed over 5 months (2-10) in average. US examination using a 10-MHz linear transducer were performed in three cases. The causes of dislocations were traumatic in 5 cases and congenital in one case. Results: In only 3 cases which could not be diagnosed clinically, we performed US. In dynamic US, all three cases showed the extensor tendon dislocation evidently. Operative findings were sagittal band rupture in 4 cases, capsular loosening in one case and sagittal band thinning in one case. Sagittal band repair was performed in 4 cases and capsular augmentation in one case. In case of congenital dislocation showing 4 digital extensor tendon dislocations in right hand, we operated only the second extensor by sagittal band repair with augmentation by looping. At last follow-up, no case showed recurrence or limitation of motion. Conclusion: In case of extensor tendon dislocation without apparent clinical finding, US with dynamic study has so great value that it can detect the dislocation in real time, which is superior to MRI.

• Proceedings of the Korea Water Resources Association Conference
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• 2010.05a
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• pp.1375-1379
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• 2010

물관리 주무부처인 국토해양부(이하 국토부)는 최근의 전 세계적인 기후변화와 더불어 유역의 도시화 등으로 인해 급격한 하천환경 및 사회적 여건변화에 맞추어 "하천법"을 전부개정(법률 제8338호)하여 2008년 4월 7일부터 시행하고 있다. 개정 "하천법"에서는 하천수 사용 관리 조정기능이 크게 강화되어 국가 및 지방하천에서 하천수를 취수하여 특정용도로 사용하려는 경우, 그 취수량에 관계없이 누구나 관할 홍수통제소장에게 허가를 받아야한다. 따라서 국토부 소속기관이자 국가 물관리 전문기관인 홍수통제소는 수문조사, 이수(하천유량 관리 등) 및 치수(홍수예보 등) 등의 주요업무 중 기존 국가하천에 국한되었던 하천수사용 관리를 지방하천까지 확대하게 되었다. 본 연구에서는 하천법에 따라 집행된 2009년 국가하천, 지방하천 및 일시적인 하천수 사용 인 허가 행위 등 하천수관리 현황자료를 조사 정리하였다. 현황 자료를 토대로 행정구역(시 도)별, 수계별, 용도별, 허가량별, 월별 분석을 수행하고 그 특성을 파악하였다. 그리고 일시적인 하천수사용은 상기 분석 이외에 하천등급별, 공사종별 분석을 수행하였다. 2009년 총 152건(반려, 취소 등을 제외한 행위는 총 131건 : 국가하천 43건, 지방하천 33건, 일시적인 하천수 55건)의 기본적인 통계분석을 통하여 낙동강유역의 하천수사용 특성을 제시하고, 파악된 하천수사용 특성 결과는 낙동강유역의 물관리정책에 소중한 기초자료로 활용될 것으로 판단된다.

• Journal of Plant Biology
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• v.6 no.3
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• pp.6-14
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• 1963

YIM, Kyong Bin (Coll. of Agriulture, Seoul National University) Effect of neutron and gamma irradiation on the germination of diploid and tetraploid rye seeds. Kor. Jour. Bot. VI(3):6-14, 1964. Tetraploid rye, Secale cereale 4x, was more tolerant to fast nuetron than diploid rye. Root growth was more suppressed than was seedling height in both diploid and tetraploid rye. A stimmulative effect on the dry weight of the shoot could be observed at very low doses of irradiation. It was the fact that the lower the moisture content of the seeds, the higher the radiosensitivity. Concerning seedling height growth, the effectiveness ratio of N/X equalled about 20.0 in diploid rye and about 18.2 in tettraploid rye, when the 50% dose ratios is used for this quotient calculaiton.

• Journal of Korea Fair Competition Federation
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• no.101
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• pp.59-72
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• 2004

• Pallet News
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• s.3
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• pp.7-8
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• 1997

• Monthly Duck's Village
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• s.246
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• pp.36-37
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• 2023

• Journal of Korean Society on Water Environment
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• v.36 no.6
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• pp.500-507
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• 2020

This study examined the wastewater at a livestock farm, and found that the dairy wastewater from the milking parlor had a lower concentration than the piggery wastewater, and that it was produced at a rate under 1.3 ㎥/day in a single farmhouse. The amount of dairy wastewater was determined based on the performance of the milking machine, the maintenance method of the milking parlor, and the amount of milk production allocated for each farmhouse, not by the area. The results confirmed that both dairy wastewater treatment processes, specifically those using Hanged Bio-Compactor (HBC) and Sequencing Batch Reactor (SBR), can fully satisfy the water quality standards of discharge. The dairy wastewater has a lower amount and concentration than piggery wastewater, meaning it is less valuable as liquid fertilizer, but it can be easily degraded using the conventional activated sludge process in a public sewage treatment plant. Therefore, discharging the dairy wastewater after individual treatment was expected to be a more reasonable method than consigning it to the centralized wastewater treatment plant. The effluent after the SBR process showed a lower degree of color than the HBC effluent, which was attributed to biological adsorption. In the case of the milking parlor in the livestock farm, the concentrations of the effluents obtained after HBC and SBR treatments both satisfied water quality standards for the discharge of public livestock wastewater treatment plants at 99% confidence intervals, and the concentrations of total nitrogen and phosphorous in untreated wastewater were even lower than the water quality standards of discharge. Therefore, we need to discuss strengthening the water quality standards to reduce environmental pollution.

• Aerospace Industry
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• s.98
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• pp.16-21
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• 2008

한국항공우주기술연구조합은 지식경제부 항공우주부품기술개발사업의 일환으로 '07년 12월부터 2개월간 수요조사를 실시하여 총 31건에 대한 사업 제안을 받았으며, 기술전문위원회의 평가결과 우선지원 대상사업으로 10건, 예비지원 대상사업으로 3건을 선정하여 지식경제부 공고 제2008-21호로 3월 24일에 공고하였다. 공고된 지원 대상사업에 대해서는 4월 15일까지 사업계획서를 접수하여 각 사업별로 주관기관을 선정할 예정이다. 선정된 주관기관과 5월 말까지 협약을 체결하고 1차년도 정부출연금(약 43억원)을 지원할 계획이다. 이에 항공우주부품기술개발사업의 신청방법과 2008년도 우선지원 대상사업인 10개 과제에 대해 소개 하고자한다.

• 녹색21
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• s.10
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• pp.50-53
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• 2006

최근 건설폐기물중간처리업체들의 신기술개발이 러시를 이루고 있는 가운데 충남 공주시에 소재한 대길환경산업(주)의 기술력이 유독 인구에 회자되고 있다. 업체설립 4년을 갓 넘긴 지방업체가 자체 개발을 통해 보유하고 있는 기술이 중간처리기술 1건에 특허 7건, 실용신안 2건이고, 게다가 지난 2월 환경부에 또 하나의 신기술인증 신청서를 제출하였으니 동종업계에선 놀랄만도 하거니와 시샘의 목소리가 나올 법도 하다. 기술력을 바탕으로 가파른 성장을 구가하고 있는 대길환경산업(주)을 소개한다.