• Journal of the Korean Wood Science and Technology
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• 제24권4호
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• pp.93-99
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• 1996

In order to investigate the extent of fixation of new water-borne preservatives in blocks of pinus densiflora sapwoods the streaming potential through the column with preservative treated wood was measured at various conditions. The rates of leachability of ingredients in the treated wood were estimated by the measurement of electric conductivity of the solution with the leached components. The solution was also analyzed by Atomic absorption spectrophotometer (AA). As a results, the experimental data indicated that the fixation of CCB, CCFZ and ACQ in wood were relatively unstable. The fixation rates of CCB, CCFZ were improved by increasing heat and drying time. The amounts of the leached ingredients were apparently higher in CCB and CCFZ than in CCA, while the rate of leaching of ACQ was not changed at various drying temperature.

• 한국근적외분광분석학회:학술대회논문집
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• 한국근적외분광분석학회 2001년도 NIR-2001
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• pp.1128-1128
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• 2001

We have developed a probe for measuring the light levels inside illuminated fruit. The probe has minimal effect on the light levels being measured and enables the sampling of the light flux at any point within the fruit. We present experimental light extinction rates within apple, nashi, kiwifruit, and mandarin fruit. Moving from the illuminated side to the far side of the fruit, the extinction level follows an initial power law decay as the light diffuses into the fruit then reduces to an exponential decay through the rest of the fruit. Significant variations in the rates of light extinction are found in the core, skin and differing flesh regions. Monte Carlo simulations of the light distribution in fruit, which use scattering and absorption coefficients for the diffusely scattering tissue, and boundary conditions for the skin effects, produce results that follow the experimental results closely.

• 한국염색가공학회지
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• 제26권1호
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• pp.53-62
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• 2014

This study examined the dyeability, color fastness and functionality of cotton fabrics dyed with residual parts of cultivated Pteridium aquilinum. UV-Vis absorption spectrum, TLC and FT-IR spectra analysis showed that colorants of Pteridium aquilinum are a mixture of pyrogallol tannin and catechol tannin. Optimum dyeing conditions was confirmed colorant concentration of 500% at $100^{\circ}C$ for 60 minutes. Color fastness followed to washing, rubbing, perspiration and light as 4-5, 5, 4-5(acidic), 3-4(alkaline) and 2, respectively. Deodorization rates of ammonia($NH_3$) and acetic acid ($CH_3COOH$) were analyzed 88.8% and 78.0%. UV protection rate was 94.2% of UV-A and 96.8% of UV-B. UV protection factor(UPF) was 27. Therefore residual parts of cultivated Pteridium aquilinum could be used for a new functional colorant.

• 한국전기전자재료학회논문지
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• 제21권4호
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• pp.362-367
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• 2008

We have Manufactured the low-k dielectric interlayer fabricated by plasma enhanced chemical vapor deposition (PECVD), The thin film of SiOCH is studied correlation between components and Dielectric constant. The precursor was evaporated and introduced with the flow rates from 16 sccm to 25 sccm by 1sccm step in the constant flow rate of 60 sccm $O_2$ in process chamber. The chemical characteristics of SiOCH were analyzed by measuring FT/IR absorption lines and obtained each dielectric constant measuring C-V. Then compare respectively. ILD of BTMSM/$O_2$ could have low dielectric constant about $k\sim2$, and react sensitively. Also dielectric constant could be decreased by the effects of decreasing $CH_3$ and growing Si-O-Si(C) after annealing process.

• 대한가정학회지
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• 제20권2호
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• pp.103-111
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• 1982

This study was designed to observe the effects of nutritional supplementation of general Korean diet on calcium metabolism and bone growth in rats. The results were summarized as follows. 1. The bone weight and the concentration of ash and calcium in femurs tended to be increased by calcium supplementation. It seemed that supplemental calcium feeding promoted bone calcification through increasing the amount of calcium retained in the body. 2. There were no differences in calcium absorption rates, retention rates in the body, urinary excretion, and serum calcium concentration, between calcium supplemented groups and the other cereal-vegetable groups. 3. The casein, vitamin B2, or vitamin A supplementation of cereal-vegetable diets did not have any significant effects on calcium metabolism and bone growth.

• 반도체디스플레이기술학회지
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• 제7권1호
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• pp.41-45
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• 2008

We studied the electrical characteristics of low-k SiOCR interlayer dielectric(ILD) films fabricated by plasma enhanced chemical vapor deposition (PECVD). The precursor bis-trimethylsilylmethane (BTMSM) was introduced into the reaction chamber with the various flow rates. The absorption intensities of Si-O-$CH_x$, bonding group and Si-$CH_x$, bonding group changed synchronously for the variation of precursor flow rate, but the intensity of Si-O-Si(C) responded asynchronously with the $CH_x$, combined bonds. The SiOCH films revealed ultra low dielectric constant around 2.1(1) and reduced further below 2.0 by heat treatments.

• 한국결정성장학회지
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• 제18권6호
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• pp.264-270
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• 2008

산업현장에서 발생되는 다양한 종류의 폐기물을 이용하여 에코골재를 제조하였다. 에코골재는 폐기물을 분쇄하고 조립성형 후, 로타리 킬른에서 $1125^{\circ}C$/15 min의 조건으로 소성하여 제조되었다. 본 연구진에 의해 제조된 에코골재 K73(Coal bottom ash 70 wt%: Dredged soil 30 wt%)과 K631(Clay 60 wt%: Stone sludge 30 wt%: Spent bleaching clay 10 wt%)을 이용하여 경량 콘크리트 흡음재를 제조하였으며, 비교를 위해 독일에서 수입된 DL(독일산 'L'사 인공경량골재)을 이용한 흡음재 역시 같은 조건으로 제조하였다. 골재의 종류, 물-시멘트비(W/C=20, 25, 30%) 그리고 설계 공극률(20, 25, 30%)의 변화에 따른 흡음특성변화를 관찰하였다. 실험결과, 경량 콘크리트 흡음재의 실제 공극률은 설계 공극률보다 $5{\sim}10%$ 정도 높게 나타났다. 임피던스관을 이용한 흡음재의 흡음계수 측정 결과, K631골재를 이용한 경량 콘크리트 흡음재(W/C=20%, V=25%)가 1000, 3150 Hz에서 각각 0.88의 흡음계수를 나타내었다.

• 임산에너지
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• 제25권2호
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• pp.42-48
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• 2006

본 연구는 강원도 홍천군 운두령 일대에 설치된 잣나무 등 5개소 생장고정조사구를 대상으로 생장변화를 구명하고, 탄소저장량 및 흡수량을 산정하여 운두령 산림관리에 기초적인 자료를 제공하고자 하였다. 임분생장변화는 유령림인 잣나무, 낙엽송, 소나무 임분에서 연년수고생장과 흉고직경생장이 점진적으로 진행되었으며, 그 외 임분은 이들보다는 생장율이 낮은 것으로 나타났다. 직경급 분포 및 직경변화 예측에 있어서는 신갈나무와 자작나무 임분의 직경급분포는 현재와 유사할 것으로 예측되며, 다른 수종은 상위 직경급으로의 변화가 많을 것으로 예측되었다. 2005년 말 현재 운두령 모델림 내 총탄소량은 5,974천 탄소톤이고, 2005년도 한 해 동안 산림의 생장에 따른 총탄소량은 166,174 탄소톤이며, 순탄소흡수량은 155,481탄소톤으로 전년 대비 2,736탄소톤(1.8%)이 증가하였다. 결과적으로 운두령모델림은 온실가스 측면에서 볼 때 순흡수원으로 작용하고 있으며, 그 순흡수량도 최근 조금씩 늘어나고 있는 경향을 보이고 있다.

• 분석과학
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• 제16권5호
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• pp.399-406
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• 2003

본 연구는 수소화물 발생장치가 부착된 원자흡광 광도계 (HG-AAS)를 이용하여 비교적 고농도의 Se을 함유하고 있는 석유정제 폐수의 Se 분석을 위하여 적합한 분석조건을 선정하고자 수행되었다. Se(VI)의 Se(IV)로의 환원 실험에서 폐수량 10 mL, 염산 주입량 10 mL, 가열시간 30분이 최적 환원조건으로 결정되었다. 폐수의 조성성분과 유기물의 농도가 높은 경우에는 Se 회수율이 감소하였다. 따라서 3가지 산분해법 ($HNO_3/HClO_4$ 분해, $KMnO_4$ 분해 및 초단파 산분해)에 의한 유기물, 석유화합물 분해 및 유기성 Se(org.), Se(IV) 산화에 따른 Se 회수율을 검토하였다. 실험결과 산분해전 약 50~80%이었던 Se 회수율은 모든 산분해에서 90%이상이었으며 특히, 초단파 산분해에 의한 Se 회수율이 가장 높은 것으로 나타났다. 그러므로 HG-AAS를 이용한 석유정제 폐수의 Se 분석시에는 초단파 산분해후 염산 처리를 하는 전처리 과정이 가장 적합한 것으로 나타났다.

• 한국막학회:학술대회논문집
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• 한국막학회 2003년도 The 4th Korea-Italy Workshop
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• pp.119-122
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• 2003

No Abstract, See Full Text