• 성인간호학회지
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• 제17권1호
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• pp.23-33
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• 2005

Purpose: To evaluate physical characteristics, lifestyle related to bone-health, and bone mineral density (BMD) in mothers and their daughters and to determine the predictors of BMD. Method: BMDs at the forearm, lumbar spine, and femur were measured in 101 healthy, mother-daughter pairs by dual energy X-ray absorptiometry. Mother-daughter differences between general characteristics, means for BMDs were assessed by ${\chi}^2$-test, t-tests. Multiple regression analyses were used to identify predictors of BMD in each group. Results: Mothers had significantly higher BMD than their daughters at forearm, lumbar spine, and femur. The predictors of mothers' BMDs were body weight, body mass index (BMI) and percentage body fat, explaining 5.1~31.6% of the variation in BMDs. BMI, percentage body fat and their mother's BMD of the corresponding site bone were predictors in daughters, explaining 17.5~31.6% of the variations in BMDs. Conclusion: These results indicate the importance of weight on bone that the BMDs seems to be related to fat free mass both in young-adult daughters and in middle aged mothers. These also suggest the importance ofintervention for the development of BMD in daughter of mother with low BMD.

• 대한본초학회지
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• 제26권4호
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• pp.89-94
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• 2011

Objective : Kyenegum has been frequently used for characterizing digestive symptoms in the traditional and oriental medicines. This study was conducted to investigate the characteristics of extracts from velvet antlers using the 4 different kinds of extracting methods. Methods : The extracts of velvet antlers were extracted using a $65^{\circ}C$ DW (9hrs), a Kyenegum crude enzyme, a $121^{\circ}C$ DW (2hrs), and a Kyenegum protease. To evaluate the characteristic of velvet antler extracts, we examined the brix, soluble solid, amino acid, mineral composition, and collagen protein. Results : As a result of the comparisons of velvet antlers extracted by the traditional extraction and the crude enzyme of kyenegum, the brix and soluble solid showed the higher contents for kyenegum enzymes. Also, mineral contents of the extracted velvet antlers were higher, particularly in Ca and P for those. The contents of collagen protein, hydroxyproline and hydroxylysine, were found to be more than twice in kyenegum protease compared with other extracting methods. Conclusion : These results indicated that the Kyenegum crude enzyme and protease are very effective to extract of velvet antlers.

• Mycobiology
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• 제39권2호
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• pp.85-91
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• 2011

We investigated the effect of nutritional and environmental factors on Ophiocordyceps longissima mycelial growth. The longest colony diameter was observed on Schizophyllum (mushroom) genetics complete medium plus yeast extract, Schizophyllum (mushroom) genetics minimal medium, and Sabouraud dextrose agar (SDA); however, malt-extract yeast-extract agar, SDA plus yeast extract, yeast-extract malt-extract peptone dextrose agar, SDA, oatmeal agar, and potato dextrose agar showed higher mycelia density. A temperature of $25^{\circ}C$ was optimum and 7.0 was the optimum pH for mycelial growth. Colony diameter was similar under light and dark conditions. Maltose and yeast extract showed the highest mycelial growth among carbon and nitrogen sources respectively. The effect of mineral salts was less obvious; however, $K_3PO_4$ showed slightly better growth than that of the other mineral salts tested. Among all nutrition sources tested, complex organic nitrogen sources such as yeast extract, peptone, and tryptone were best for mycelial growth of O. longissima. Ophiocordyceps longissima composite medium, formulated by adding maltose (2% w/v), yeast extract (1% w/v), and $K_3PO_4$ (0.05% w/v) resulted in slightly longer colony diameter. In vitro mycelial O. longissima growth was sustainable and the production of fruiting bodies could be used for commercial purposes in the future.

• 자원리싸이클링
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• 제21권6호
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• pp.51-57
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• 2012

본 연구의 목적은 금풍광산 광물찌꺼기 내 중금속의 광물학적 특성을 조사하고, 중금속 제거를 위한 부유선별 실험을 하였다. 광물학적 분석 결과, 휘동석, 유비철석, 황철석, 섬아연석, 방연석 등 황화광물이 존재하였다. 카드뮴과 다른 중금속(Cu, Pb, Zn)의 상관관계를 살펴보면 Cd는 Zn과 좋은 양의 상관관계를 가졌다. K.A.X.(Potassium Amyl Xanthate)와 Aerofloat 211을 포수제로 사용한 부유선별 실험 결과 광물찌꺼기 내 잔류 중금속(As, Cd, Cu, Pb, Zn)의 농도가 토양오염기준치를 만족하는 결과를 얻었다.

• 한국지하수토양환경학회지:지하수토양환경
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• 제25권2_spc호
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• pp.55-69
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• 2020

Permeability-analyzing methods commonly involve small-scale drilling, such as pumping or slug test, but it is difficult to identify overall distribution of permeability of the entire target sites due to high cost and time requirement. Spectral induced polarization (SIP) method is known to be capable of providing distributions of both the porosity and the pore size, the two major parameters determining permeability of the porous medium. The relationship between SIP variables and permeability has been studied to identify the hydrological characteristics of target sites. Kozeny-Carman formula has been improved through many experiments to better predict fluid permeability with electrical properties. In this work, the permeability prediction techniques based on SIP data were presented in accordance with the hydrogeological and electrical characteristics of a porous medium. Following the summary of the techniques, various models and related laboratory experiments were analyzed and examined. In addition, the field applicability of the prediction model was evaluated by field case analysis.

• Advances in concrete construction
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• 제7권2호
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• pp.75-85
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• 2019

The present study is focused on the mechanical and durability properties of ternary blended cement concrete mix of different grades 30 MPa, 50 MPa and 70 MPa. Three mineral admixtures (fly ash, silica fume and lime sludge) were used as a partial replacement of cement in the preparation of blended concrete mix. The durability of ternary blended cement concrete mix was studied by exposing it to acids HCl and $H_2SO_4$ at 5% concentration. Acid mass loss factors (AMLF), acid strength loss factor (ASLF) and acid durability factor (ADF) were determined, and the results were compared with the control mix. Chloride ions penetration was investigated by conducting rapid chlorination penetration test and accelerated corrosion penetration test on control mix and ternary blended cement concrete. From the results, it was evident that the usage of these mineral admixtures is having a beneficiary role on the strength as well as durability properties. The results inferred that the utilization of these materials as a partial replacement of cement have significantly enhanced the compressive strength of blended concrete mix in 30 MPa, 50 MPa and 70 MPa by 42.95%, 32.48% and 22.79%. The blended concrete mix shown greater resistance to acid attack compared to control mix concrete. Chloride ion ingress of the blended cement concrete mix was low compared to control mix implying the beneficiary role of mineral admixtures.

• PNF and Movement
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• 제11권2호
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• pp.127-134
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• 2013

Purpose : The purpose of this study of normal elderly and stroke patients by comparing the dominant side and recessive side was to evaluate the differents between each Methods : Thirty-two elderly participated in this study. They were classified two groups: stroke patients group and the normal elderly group. Outcome measures were: general characteristics and BMD. General characteristics included age, height, weight and body mass index. BMD was represented in the osteoporosis index, T-score and Z-score. The measurements of bone mineral density were evaluated on the calcaneus region of the dominant and recessive side, using OsteoPro. The data analyzed using SPSS 17.0 software and the Paired-sample T-test and the Independent-sample T-test Results : OI, T-score, Z-score showed no significant differences between dominant side and recessive side in normal elderly group. But stroke patients group showed OI, T-score, Z-score significant differences between paretic side and nonparetic side. Change score subtracted recessive side from dominant side was significant differences between stroke patients group and normal elderly group. Conclusion : There is positive relationship between physical activity and BMD in stroke patients. Therefore, improved physical activity can have a beneficial effect by reducing osteoporosis in stroke patients, considering a positive relationship between physical activity and BMD.

• 한국광물학회지
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• 제23권3호
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• pp.199-209
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• 2010

석탄가스화는 청정석탄이용기술의 한 분야로 최근 국제 유가의 급격한 변동과 더불어 매우 각광을 받고 있는 기술이다. 본 연구에서는 중국 내몽고 지역의 저급석탄을 출발물질로 가스화를 위한 광학적 특성, X선 분광특성, X선 회절특성, 광물학적 특성, 건조특성 등을 분석하였다. 분석결과 석탄의 등급은 slagging성과 fouling성이 매우 낮으며 착화온도가 $250^{\circ}C$ 정도인 brown coal인 것으로 조사되었고, 석영, 능철석, 점토광물 등이 주요 불순물로 혼재하는 것을 알 수 있었다. 또한 초기 수분이 28%로 매우 높기 때문에 이를 쉽게 건조하기 위한 방법으로 열풍건조와 마이크로웨이브 건조기술을 적용하여 비교한 결과, 마이크로웨이브를 이용한 건조가 좀 더 효과적인 것을 알 수 있었다.

• 보존과학회지
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• 제19권
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• pp.19-30
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• 2006

저습지에서 출토된 상수리나무를 재료로 세척에 따른 수침고목재 내 이물질의 제거 효과와 물리 화학적 특성 변화를 파악하였던 바 얻어진 결과는 다음과 같다. 수침고목재에 나타나는 대부분의 무기성분은 수침고목재가 매몰된 토양환경의 성분과 거의 동일하였다. 보존처리 현장에서 적용하고 있는 세척방법 즉, 도구법, 탈기법, EDTA법 및 초음파세척법을 적용하여 독립적 혹은 연속적 방법으로 수침고목재를 세척하였다. 독려세척의 경우 도구법에 의해 표면에 고착된 이물질이 효과적으로 제거되었고, EDTA 처리에 의해 표면 색상이 밝아졌다. 그러나 탈기법과 초음파에 의한 세척효과는 나타나지 않았다. 연속 세척의 경우 1단계 세척(도구법)은 독립세척과 동일한 효과를 얻었으며, 2단계 세척인 탈기법은 수침고목재 내에 있는 이물질을 제거하지 못했다. 탈기법이 무기물의 제거에는 적절하지 않았지만, 탈기 후 수침고목재가 균일화되어 치수안정제의 침투를 용이하게 하는 역할은 결코 무시할 수 없을 것으로 사료된다. 3단계 EDTA처리는 수침고목재 내의 철분(Fe)을 제거함으로써 수침고목재의 색상이 밝아지는 효과를 얻을 수 있었다. 4단계 세척은 3단계 세척시 목재 내에 잔류한 약품(Na)과 미세 이물질의 제거에 효과적이었다.

• 한국지구과학회지
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• 제30권2호
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• pp.176-184
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• 2009

본 연구의 목적은 조암광물의 광학적 특징에 대한 웹 컨텐츠를 개발하고 적용하는데 있다. 개발된 웹 콘텐츠는 학습 목표와 교수 학습 내용을 명료하게 보여주고 학습 내용의 접근과 항목간의 이동을 원활히 하는 시스템을 구축하는 한편 중고등 학교 교과서에서 가장 많이 인용되는 8종의 조암광물에 대한 광학적 특징을 동영상과 사진으로 제시하여 학생들의 광물에 대한 이해도를 높였다. 개발된 웹 컨텐츠를 수업에 적용한 후 MALSM를 이용한 교수-학습 자료로서의 질적 수준과 학습 효과를 분석한 결과 대부분의 학생들은 수업목표, 학습내용, 수업전략, 화면구성, 이용의 편의성, 학습자료 항목에서 긍정적인 반응을 보였다. 웹 컨텐츠를 이용한 수업을 받은 학생 중에서 약 62%의 학생들이 편광현미경으로 박편상의 조암광물을 동정할 수 있었다.