• 한국약용작물학회지
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• 제5권3호
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• pp.211-216
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• 1997

작약(芍藥) 수확후(收穫後) 조제과정(調製過程)과 관련하여 양질의 약재(藥材)를 생산하기 위한 기초자료를 얻고자 박피정도(剝皮程度)에 따라 건조방법(乾燥方法)을 달리하여 시험한 결과를 요약하면 다음과 같다. 1. 작약은 수확후 수세(水洗)만 거치고 껍질을 제거하지 않은 무박피가 박피기로 기계박피한 것에 비하여 박피노력절감 및 15%의 수량 손실 방지 효과를 나타내었다. 2. 작약(芍藥) 건조시(乾燥時) 수분함량 14%에 도달하기 위한 소요시간은 무박피가 박피보다 건조시간이 길어지는 단점이 있었다. 3. 주성분(主成分) Paeoniflorin 함량은 표피에 5.11%, 피층에 3.28%로 껍질부분에 다량 함유하고 있어서 무박피가 Paeoniflorin함량이 유실없이 그대로 보존되어 박피작약보다 높았고, 건조방법 간에는 상온 음건이 가장 높았다. 4. 박피작약(剝皮芍藥)의 경우 건조근(乾燥根)의 색상은 연탄불 건조후 열풍건조가 가장 양호하여 연 탄훈증 효과가 현저하였으나 무박피작약(無剝皮芍藥)에는 별다른 영향을 미치지 않았으므로 열풍만으로도 건조가 가능하였다.

• 한국구조물진단유지관리공학회 논문집
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• 제2권3호
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• pp.205-211
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• 1998

The purpose of this study is to evaluate shear strengthening effects of R/C beams with carbon fiber sheets. The major variables are shear reinforcement ratios, CFS strengthening ratios and strengthening methods of CFS. Following conclusions can be extracted. The shear capacity of beam strengthened with CFS is about 32~87% higher than that of beams without shear reinforcement. The strengthening effects of patch type is larger than those of strip type. The strain distribution in CFS intersected with shear crack is similar to that in stirrup and larger strain is observed in the middle of the shear span. It can be estimated that shear strength reduction factor ${\alpha}$=0.3 is appropriate for peeling effect of CFS.

• 동아시아식생활학회지
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• 제22권6호
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• pp.860-867
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• 2012

Codonopsis lanceolata serves as, an appetizing health food for its, characteristic flavor, taste, and texture:however, it requires a long and complicated cooking process. Therefore, this study conducted pre-processing procedures to improve the cooking process and Codonopsis lanceolata more easily. For processing efficiency, freezing and blanching were efficient for peeling and the rate of peel disuse. In addition the freezing process, effectively reduced the time spent in beating raw material. In the salinity test, freezing and blanching quickly increased salinity over 28 days. As the result of SEM cross-section tests showed that frozen Codonopsis lanceolata become porous, it's assumed that seasoning permeates into this cross-section efficiently. As the appearance of Deodeok-gui as significant differences according to the pre-processing methods, this study examined pre-processing methods(time spent in peeling, rate of peel disuse, time spent in beating out material, salinity, moisture content, texture, and the color) of Codonopsis lanceolata. After testing Deodeok-gui, it was found that freezing is effective, not only for process efficiency and cooking time reduction, but also for improving its qualities.

• 한국약용작물학회지
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• 제18권2호
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• pp.98-104
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• 2010

Eleuthero(Eleutherococcus senticosus Maxim.) cortex is well known as a herb medicine for tonic. This study was performed to improve the quality of dried E. senticosus cortex. Investigation of quality factor and contents of efficient compounds under different steaming times and drying methods were performed to determine the proper processing and drying conditions of Eleuthero cortex harvested on March in annual stems. The proper steaming time for peeling bark to make high quality Eleuthero cortex took less than 20 mins. Eleutheroside B and E contents among drying methods were significantly different at 5% level DMRT. The $50^{\circ}C$ heat drying was the most advisable condition for drying, when drying and keeping contents of effective compounds.

• Structural Engineering and Mechanics
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• 제77권1호
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• pp.75-87
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• 2021

The present study pertains to the introduction of two new types of grip adaptor for universal testing machines, namely Polyvinyl Chloride (PVC) and Polyoxymethylene (POM) grip adaptors, and their application to tension testing of FRP bars with different fiber and surface finish types. The tabs are connected to the FRP bar sample with the help of mechanical anchors, i.e. bolts. These new adaptors offer vital superiorities over the existing end tab designs (anchors with filling material or mechanical anchorage), including the reduction in the time and labor for production, reusability and the mild nature, i.e. low hardness of the tab material, which retards and even prevents peeling and crushing in the gripping regions of an FRP sample. The methods were successfully applied to FRP bars with different types of fiber (CFRP, GFRP and BFRP) and different types of surface texture (ribbed, wrapped, sand-coated and wound). The test results indicated that the both types of end caps prevented slip of the bar, crushing and peeling in the gripping zone. The mechanical properties from the material tests with the new caps were in perfect agreement with the ones from the material tests with steel tubular caps.

• 한국환경농학회지
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• 제33권2호
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• pp.111-120
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• 2014

인천시내에 유통되는 오렌지, 키위 등 215건의 과일에 대하여 분석대상 농약 259종에 대한 잔류농약 모니터링을 실시하였다. 전체 수거 과일의 56.3%에서 기준이내 농약이 검출되었으며, 이중 수입과일은 60.8%, 국내산 과일은 45.1%의 검출률을 나타내었으나 농약잔류허용기준을 초과한 품목은 없었다. 그 중 감귤류의 농약 검출률은 83.9%로 상당히 높은 수준으로 나타났다. 농약성분별 검출빈도는 carbendazim(13.1%), imazalil(11.7%), thiabendazole(10.7%), fludioxonil(9.8%) 순으로, 검출된 농약의 위해성 평가결과 해당 농산물섭취에 따른 인체 유입 농약의 일일섭취추정량 ADI%는 0.00011~0.98795% 수준으로 위해성은 낮은 것으로 추정된다. 또한, 감귤류와 같은 과피를 제거 하고 섭취하는 과일은 과피 제거로 91.6%의 잔류농약 경감 효과를 나타내었으며, 세척 후 섭취하는 형태인 포도나 체리 등은 수돗물 침지 후 세척법에 의해서 평균 43.1%의 잔류농약 감소를 보여, 과일섭취에 따른 위해성 역시 상당부분 감소할 것으로 보인다.

• 한국자원식물학회지
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• 제27권1호
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• pp.72-79
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• 2014

본 연구는 마찰과 칼날 박피방식과 저장온도에 따른 박피밤의 품질 변화를 조사하기 위하여 수행되었다. 박피밤의 중량감소율은 저장기간 동안 모든 처리구에서 관찰되었으며, 박피방식에 따른 차이는 관찰할 수 없었다. 그러나 박피밤의 수분함량은 모든 처리구에서 저장기간에 따라 감소하는 경향을 보였는데, 마찰박피밤이 모든 처리구에서 칼날박피밤 보다 수분함량이 높았다. 박피밤 색도의 경우 a, b, ${\Delta}E$값은 모든 처리구에서 저장기간 동안 증가한 반면, L값은 저장기간 동안 감소하였다. 다만, 마찰 박피밤의 갈변정도가 칼날 박피밤보다 높게 나타났다. 과육경도는 마찰박피와 칼날박피에서 $-1^{\circ}C$ 처리구의 밤이 가장 높았으며, 당함량은 저장직후부터 감소하였으나 저장 24일째부터 당함량이 증가하는 경향을 나타내었다. 박피밤의 식미와 식감은 모든 처리구에서 저장기간이 늘어날수록 감소하였으며, 저장 15일 이후로 급격하게 감소하는 경향을 보였다. 따라서 위의 결과를 볼 때 마찰과 칼날 밤피밤의 품질차이는 나타나지 않았다. 하지만 $4^{\circ}C$와 $2^{\circ}C$에서 저장한 박피밤은 15일 이후 품질이 급격하게 감소한 반면 $-1^{\circ}C$에서 저장한 박피밤은 천천히 감소하여 품질을 유지하는데 효과적이었다. 또한 마찰 박피밤의 갈변을 줄일 수 있으면 고품질의 우수한 박피밤이 생산될 수 있을 것이다.

• 대한치과교정학회지
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• 제51권4호
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• pp.270-281
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• 2021

Objective: The aim of this in vitro study was to evaluate the changes in friction between orthodontic brackets and archwires coated with aluminum oxide (Al₂O₃), titanium nitride (TiN), or chromium nitride (CrN). In addition, the resistance of the coatings to intraoral conditions was evaluated. Methods: Stainless steel canine brackets, 0.016-inch round nickel-titanium archwires, and 0.019 × 0.025-inch stainless steel archwires were coated with Al₂O₃, TiN, and CrN using radio frequency magnetron sputtering. The coated materials were examined using scanning electron microscopy, an X-ray diffractometer, atomic force microscopy, and surface profilometry. In addition, the samples were subjected to thermal cycling and in vitro brushing tests, and the effects of the simulated intraoral conditions on the coating structure were evaluated. Results: Coating of the metal bracket as well as nickel-titanium archwire with Al₂O₃ reduced the coefficients of friction (CoFs) for the bracket-archwire combination (p < 0.01). When the bracket and stainless steel archwire were coated with Al₂O₃ and TiN, the CoFs were significantly lower (0.207 and 0.372, respectively) than that recorded when this bracket-archwire combination was left uncoated (0.552; p < 0.01). The friction, thermal, and brushing tests did not deteriorate the overall quality of the Al₂O₃ coatings; however, some small areas of peeling were evident for the TiN coatings, whereas comparatively larger areas of peeling were observed for the CrN coatings. Conclusions: Our findings suggest that the CoFs for metal bracket-archwire combinations used in orthodontic treatment can be decreased by coating with Al₂O₃ and TiN thin films.

• 환경위생공학
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• 제18권3호통권49호
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• pp.21-26
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• 2003

The generation of waste cable has been continuously increased as a production of electrical and communication media are extended. The current recovery methods, such as mechanical peeling, incineration, solvent extraction and pyrolysis, seems inadequate because they are either hard to apply in some cases or environmentally unacceptable. It has been shown that copper can be effectively separated from the jelly filled type cables using a soybean oil treatment method. As a result, jelly compound is vanished from the wire by soybean oil bath and waste wires are separated copper and PE by the mechanical chipper. This is a more environmentally friendly method than burning, and considerably faster than Stripping.

• 한국표면공학회지
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• 제51권4호
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• pp.202-206
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• 2018

Permalloy($Ni_{80}-Fe_{20}$) which is known for its soft magnetic properties is a well-known material that has been studied intensively. Permalloy nanoflakes were fabricated with the combination of electrodeposition and sonication process. Ultrasonic power was applied to the deposited alloy which produced nanoflakes in forms of sheet. High internal stress created cracks which helped the peeling of permalloy into nanosheets. Because of shape anisotropy, flakes could be aligned by magnetic field. The magnetic properties of the nanosheets were observed, and the variation of magnetic properties with the alignment of flake was also investigated.