• 유기물자원화
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• 제29권3호
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• pp.17-25
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• 2021

본 연구는 음식물류폐기물건조분말(FWP) 및 유기질비료(MOF)와의 혼합물의 처리별 청경채의 생장특성을 비교하기 위해 수행되었다. FWP 처리 후 청경채의 생장 조사 결과, FWP 처리구(2,500 kg/ha, 5,000 kg/ha, 10,000 kg/ha)는 무처리구나 대조구보다 생장이 감소하였다. FWP와 MOF 혼합물(FWP10, FWP20, FWP30) 처리 후 청경채의 생장은 대조구(MOF)와 통계적으로 유의적인 차이를 나타내지 않았으나 혼합물 중 염분 함량과 청경채의 생장 지수는 부의 상관성(P<0.05)을 보였다. FWP와 MOF 혼합물 중에서 FWP10의 처리량(FWP10: 2,500 kg/ha, 2FWP10: 5,000 kg/ha, 3FWP10: 7,500 kg/ha, 4FWP10: 10,000 kg/ha)별 청경채의 생장은 FWP10, 2FWP10, 3FWP10 처리구는 화학비료 처리구와 통계적으로 유의적인 차이를 나타내지 않았고, 4FWP10 처리구는 화학비료 처리구보다 감소하였다. FWP10 시비수준(1~3배)에 따른 염분 공급량과 청경채의 생장 비교 시 부의 상관성(P<0.01)을 나타내었다. 상기 결과들을 종합할 때, 음식물류폐기물건조분말은 유기질비료의 원료로 사용이 가능하며, 음식물류폐기물건조분말이 함유된 유기질비료의 시비에 따른 토양중 염분의 농도가 증가한 경우 청경채의 생장을 감소시킨다는 것을 확인하였다.

• 공업화학
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• 제7권1호
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• pp.101-108
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• 1996

본 연구에서는 수용액 내에서 생분해도가 우수하고 인체에 mild한 비이온성 계면활성제 GL12와 범용 음이온성 계면활성제인 linear laurylbenzene sulfonate(LAS) 또는 sodium polyoxyethylene(3) glycol lauryl ether sulfate(SLES) 각각 용액의 dynamic surface tension과 이들 계면활성제 혼합용액의 dynamic surface tension이 혼합비에 따라 어떻게 변화되는지 maximum bubble pressure method를 이용하여 조사하였다. 또한 salting-cut 효과가 있는 NaCl, CsCl과 salting-in 효과가 있는 요소를 계면활성제 용액에 첨가하여 이들 염들이 용액의 dynamic surface tension에 미치는 영향에 대하여도 연구하였다. 비이온성 계면활성제인 GL12의 dynamic surface tension은 염의 존재에 영향을 크게 받지 않았으나 음이온성인 SLES와 LAS는 크게 영향을 받았다. 또한 GL12/SLES와 GL12/LAS 혼합계에서도 GL12의 함량이 많을수륵 용액의 dynamic surface tension에 대한 염의 영향이 감소하였으나 LAS 또는 SLES의 함량이 증가할수록 염의 영향은 증가하였다.

• 한국해양학회지
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• 제30권4호
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• pp.262-270
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• 1995

금강 하구언 갑문의 폐쇄에 따른 금강하구의 물리, 퇴적학적 특성변화를 살펴 보 았다. 갑문쇄 이후 최대조류 유속은 갑문개방 시기에 비하여 약 30-40% 감소하였다. 또한 금강하구의 수괴유동이 둔화되어, 염분 및 수괴투명도의 수직적 성충(vertical stratification)이 형성되었다. 이에 따라 금강하구는 갑문개방기의 완전혼합형 (wellmixed type) 하구로부터 갑문쇄 이후에는 부분혼합형(partially-mixed type) 또 는 염쇄기형(salt-wedge type)하구로 변이하였다. 갑문이후 부유물함량은 표층에서 1 0∼100 mg/l의 범위로 측정되어, 갑문개방기에 비하여 약 1/4∼1/3의 수준으로 뚜렷하 게 감소하였다. 이와 같은 부유물함량의 감소경향은 첫째 조류유속이 감소하여 해저퇴 적물의 저층재부유 현상이 감소하였고, 둘째 수괴의 수직적성층이 형성되어 저층 혼탁 수의 상부확산이 둔화되었기 때문으로 변이하였고, 세립질 부유퇴적물의 퇴적작용이 보다 활발하게 나타날 것으로 예상된다.

• 대한가정학회지
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• 제17권3호
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• pp.53-59
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• 1979

Vitamin contents of three grades of Korean laver high, medium and low were measured. They were cooked by different methods to examine changes in their vitamin content. Results of this experiment are as follows ; 1. Vitamin contained in loogr of laver amount to 13,200 I.U, for high grade, 16,100 for mediium grade, and 16,400 for low grade . The low -grade laver, which is interwoven with green laver, showed the highest vitamin content. 2. When laver was broiled sheet by sheet, its vitamin loss rate was 11% for high grade, 19% for medium grade, and 20% for low grade. Thus , the one with a higher vitamin content showed a higher vitamin loss rate. When two sheets of laver, which were put upon each other, were broiled, their vitamin loss rates were 2.3% for high grade, 1.73 % for medium grade, and 2.64% for low grade. Thus broiling laver at the unitof two to three sheets together is a way of decreasing the vitamin loss rate. 3. When laver was broiled with salt applied on its surface , its vitamin loss rate was 8.3% for high grade, 13% for medium grade, and 10.9% for low grade. When laver was broied at the unit of two sheets together after salt and sesame oil were added, its vitamin loss rate was 2.2% for high grade, 5.2% for medium grade, and 8.2% for low grade . The one with a higher vitamin content showed a higher vitamin loss rate. 4. When laver was mixed seasoned soysauce, its vitamin loss rate increased in process of time. In 48 hours after laver was mixed with seasoned soysauce , its vitamin loss rate read 24.2%, 27.1% and 35% respectively, for the three grades of laver. Thus the laver mixed with seasoned soysauce has to be used right after so cooked so as to obtained the highest possible vitamin content.

• 한국의류산업학회지
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• 제15권5호
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• pp.808-814
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• 2013

In this study, The mixture of three kinds of pre-treatment agents, Carboxymethyl cellulose sodium salt(CMC), Sodium alginate and Dextrin, have been prepared for the better coloration of digital textile printing. To get sharpness of outline during digital printing process, the optimal formulation is the CMC and Sodium alginate mixture 1:1 ratio by volume. Cyan, Yellow, and Black colours are excellent on the Sodium alginate mixtures. But, Magenta is excellent in the CMC and Dextrin mixture. Sharpness and printability are closely related to viscosity of the mixture. The most optimal sharpness of outline achieved with a consideration of coloring, and field operations account for production when the viscosity of the mixed pre-treatment agent approximately is 10~13 cSt. Change in shade and staining of wash fastness for all the treated samples with the mixtures rated 4-5 grade. Both dry rubbing fastness to shade change and staining are good in the treated samples, whereas wet rubbing fastness rated 2-3 grade. To improve wet rubbing fastness, the Sodium alginate and Dextrine mixture, which rated 3-4 grade for Black color, is applicable. With exception of 3 rating to black color, Light fastness is 4 rating for the remaining three colors in the regardless of treatment condition and mixing of the pre-treatment agent. Dry cleaning fastness of all samples are also 4-5 rating.

• 유기물자원화
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• 제26권1호
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• pp.21-28
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• 2018

유기질비료를 농경지 투입 시 적정한 사용량을 결정하는데 질소전량, 인산전량, 칼리전량 등 비료품질 특성은 매우 중요한 영향인자이다. 유기질비료의 품질특성을 분석하고자 시중에 유통되는 유기질비료 320점을 조사하였다. 유기질비료의 질소전량, 인산전량, 칼리전량 함량은 각각 4.9, 2.8, 1.7%로 나타났다. 유기물, 염분농도, 수분의 평균함량은 혼합유박에서 각각 77.0%, 11.5%, 0.3% 이었고, 혼합유기질비료에서 각각 72.3%, 11.7%, 0.5%으로 비종간에 유사하게 나타났다. 그리고 수은, 크롬, 구리, 니켈, 아연함량은 비료공정규격에서 제시된 기준치 미만으로 검출되어 공정규격에 적합한 것으로 조사되었다. 그리고, 작물의 균형적인 양분의 흡수를 촉진하기 위해서 유기질비료 중에서 비료성분함량이 가장 낮은 총칼리 성분함량을 작물의 비료요구량 비율에 맞도록 조절이 필요하며, 평균적으로 3.2%까지 증가할 필요가 있다고 판단된다.

• 한국치위생학회지
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• 제17권5호
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• pp.817-826
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• 2017

Objectives: The aim of this study was to investigate the effects of bamboo salts on remineralization effects on subsurface of artificial carious enamel. Methods: Incipient carious enamel was formed in permanent bovine incisors and then specimens were divided into three groups randomly: 3% bamboo salt (BS), 2% (NaF) and the solution of mixed 3% BS and 2% NaF. For remineralization, specimens of each of the three groups were treated for 24 hrs at $37^{\circ}C$ incubator. After treatment, specimens were analyzed using SEM and VHN. Statistical analysis used was one-way ANOVA. Results: In SEM observation, the BS group showed narrower distances between enamel rods than the cases of incipient subsurface caries enamel. The NaF and BS+NaF groups showed that the enamel rods near the surface were destructed, and innumerable round small particles were deposited near the surface of enamel. The BS+NaF group showed more minerals attachment between enamel rods than the cases of other groups. The differences in subsurface microhardness (${\Delta}VHN$) increased all of three groups in total by $80{\mu}m$. The ${\Delta}VHN$ of the BS+NaF group increased significantly more than NaF and BS groups in depth of $50{\mu}m$, $80{\mu}m$. Conclusions: The 3% bamboo salt with 2% NaF solution was found to increase subsurface hardness of incipient caries enamel. Thus, bamboo salt will be used to contribute to prevention on dental caries.

• Asian-Australasian Journal of Animal Sciences
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• 제18권2호
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• pp.296-300
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• 2005

Human-induced soil salinity is becoming a major threat to agriculture across the world. This salinisation occurs in both irrigated and rain-fed agricultural zones with the highest proportions in the arid and semi-arid environments. Livestock can play an important role in the management and rehabilitation of this land. There are a range of plants that grow in saline soils and these have been used as animal feed. In many situations, animal production has been poor as a result of low edible biomass production, low nutritive value, depressed appetite, or a reduction in efficiency of energy use. Feeding systems are proposed that maximise the feeding value of plants growing on saline land and integrate their use with other feed resources available within mixed livestock and crop farming systems. Salt-tolerant pastures, particularly the chenopod shrubs, have moderate digestible energy and high crude protein. For this reason they represent a good supplement for poor quality pastures and crop residues. The use of salt-tolerant pasture systems not only provides feed for livestock but also may act as a bio-drain to lower saline water tables and improve the soil for growth of alternative less salt tolerant plants. In the longer term there are opportunities to identify and select more appropriate plants and animals for saline agriculture.

• Fisheries and Aquatic Sciences
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• 제18권4호
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• pp.349-357
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• 2015

To reutilize fisheries waste, we isolated a bacterial strain from a coastal area located in Busan. It was identified as Bacillus licheniformis TK3-Y. Using plate assay and 500-mL flask experiments, we found that the isolate simultaneously possessed cellulolytic, proteolytic, and lipolytic activities with salt tolerance. 10% (v/v) inoculums, were used to examine the biodegradation characteristics of the TK3-Y strain on carboxymethylcellulose, skim milk, and olive oil media. The optimum conditions for pH, temperature, agitation speed, and NaCl concentration on each 1% substrate were 6, $50^{\circ}C$, 180 rpm, and 17.5%, respectively. Under optimal conditions, the TK3-Y strain showed 1.07 U/mL cellulolytic, 1,426 U/mL proteolytic, and 6.45 U/mL lipolytic activities. Each enzyme was stable within a range of 17.5-35% NaCl. Therefore, the salt tolerance ability of strain TK3-Y was superior to other related strains. In degradation of a mixed medium containing all three substrates, both the cellulolytic and proteolytic activities were somewhat lower than those on each single substrate, while the lipolytic activity was somewhat higher. From the above results, the TK3-Y strain appears to be a good candidate for use in the efficient treatment of fisheries waste in which components are not collected separately.

• 생물환경조절학회지
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• 제19권4호
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• pp.317-323
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• 2010

본 연구는 염화나트륨과 염화칼슘 처리가 오이(Cucumis sativus L.) 접목묘의 도장억제에 미치는 영향을 살펴보고자 수행되었다. 오이 접목 후 염류의 처리 방법, 처리 시기 및 처리 농도를 diniconazole 처리구 및 무처리구와 비교하였다. NaCl을 저면관수나 상토에 혼입하여 처리한 경우 과도한 줄기신장이 억제되는 효과가 있었으며 묘의 충실도 또한 증가되었다. 하지만, 염화나트륨을 두상관수 처리할 경우에는 40mM 이상 농도부터 잎에 피해 증상을 나타낸 반면 도장억제 효과는 거의 없었다. 염화나트륨 처리시기를 접목 7일 후로 할 경우 접목 시에 처리하는 것 보다 도장 억제를 위해 더 높은 농도의 염화나트륨을 필요로 하였다. NaCl 처리 접목모종의 생육을 정식 후 36일에 조사한 결과, 대조구 대비 생체중의 변화는 없었으나 고온기 암꽃 수가 감소하는 경향을 보여 위험 부담이 따랐다. 전체적으로, 염화나트륨이 염화칼슘 처리보다 줄기 신장 억제에 더 효과적이었으며 잎에 나타나는 피해 증상도 적었다.