• Asian-Australasian Journal of Animal Sciences
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• 제16권2호
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• pp.198-203
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• 2003

Acetone, which is produced from butyric acid when it passes through the rumen wall, was infused into the rumen and jugular veins of three female goats to investigate the role of acetone in ruminating and masticating behavior. The ruminating behavior, as measured by the number of boli and the ruminating time, decreased (p<0.05) with intraruminal acetone infusion. However, the ruminating behavior did not change significantly in response to intravenous acetone infusion. Feed intake significantly decreased with intraruminal acetone infusion, but not with intravenous acetone infusion. The concentrations of acetone in the plasma increased significantly (p<0.05) with both acetone infusion regions. Ruminal fluid acetone, and isopropyl alcohol (IPA), which is one of the ketone bodies, produced from acetone by bacterial action in rumen, concentrations were significantly increased (p<0.05) with both acetone infusion regions. These results suggest that the chemoreceptors sensitive to acetone are more likely to be in the rumen epithelium, portal system, or liver, where they can respond to acetone levels.

• 한국안전학회지
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• 제38권2호
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• pp.30-35
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• 2023

Acetone is a widely used Volatile Organic Compound (VOC) in industries and laboratories. However, acetone affects human health adversely and causes fires and explosions. Early acetone detection and improved personnel training in safety and emergency management are necessary to prevent acetone-related accidents. The multi-VOC acetone detectors used currently have a sensitivity and selectivity limit. In this study, we discovered that Pt-loaded iron oxide (a metal oxide semiconductor) conversely, has high detection and selectivity for very low-levels of acetone gas. The loaded Pt catalyzes the reaction between the sensing materials' surface and the oxygen molecules in the air; this optimizes acetone detection and can decrease acetone-related illnesses, fires and explosions.

• 한국안전학회지
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• 제25권4호
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• pp.30-35
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• 2010

For the safe handling of acetone, the flash point, the explosion limit at $25^{\circ}C$ and the temperature dependence of the explosion limits were investigated. And the AIT for acetone were experimented. By using the literatures data, the lower and upper explosion limits of acetone recommended 2.5 vol% and 13.0 vol%, respectively. In this study, the lower flash points of acetone recommended $-20^{\circ}C$. This study was determined relationship between the AITs and the ignition delay times by using ASTM E659-78 apparatus for acetone, and the experimental AIT of acetone was $565^{\circ}C$. The new equations for predicting the temperature dependence of the explosion limits of acetone is proposed. The values calculated by the proposed equations were a good agreement with the literature data.

• 한국환경과학회지
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• 제24권3호
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• pp.317-322
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• 2015

The photocatalytic decomposition characteristics of toluene, acetone, and methyl mercaptan (MM) by UV reactor installed with $TiO_2$-coated perforated plane were studied. The removal efficiency of single toluene, acetone, and MM vapor was increased with increasing oxygen concentration, but decreased with increasing inlet concentration. Elimination capacity of single toluene, acetone, and MM vapor was obtained to be $628g/m^3{\cdot}day$, $1,041g/m^3{\cdot}day$, and $2,158g/m^3{\cdot}day$, respectively. Also, the photocatalytic decomposition of binary vapor consisted of toluene and acetone, toluene and MM, acetone and MM were observed. Elimination capacity of toluene mixed with acetone, toluene mixed with MM, acetone mixed with toluene, acetone mixed with MM, MM mixed with toluene, and MM mixed with acetone was $327g/m^3{\cdot}day$, $512g/m^3{\cdot}day$, $128g/m^3{\cdot}day$, $266g/m^3{\cdot}day$, $785g/m^3{\cdot}day$ and $883g/m^3{\cdot}day$, respectively. The inhibitory effect of acetone was higher than MM in photocatalytic decomposition of toluene, the inhibitory effect of toluene was higher than MM photocatalytic decomposition of acetone, and the inhibitory effect of toluene was higher than acetone in photocatalytic decomposition of MM.

• 한국응용과학기술학회지
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• 제36권1호
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• pp.248-257
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• 2019

본 연구는 아세톤 농도에 따른 리무버액의 젤네일 제거 정도, 손톱 표면에 미치는 영향을 비교하고자 100%아세톤, 5%아세톤, 0%아세톤, 아보카도 넌아세톤 4종의 리무버액으로 젤네일을 제거하여 시간경과에 따른 손톱 변화를 관찰하였고 제거 전 후의 손톱 표면거칠기, 표면볼륨, 수분량 및 경피 수분증발량을 측정하였다. 실험 결과, 젤네일 제거정도에서 100%아세톤, 아보카도 넌아세톤, 5%아세톤, 0%아세톤 순으로 젤이 제거되었고 손톱 표면거칠기에서는 5%아세톤, 0%아세톤, 아보카도 넌아세톤이, 표면볼륨에서는 0%아세톤이 젤네일 제거 전 후 유의한 차이가 나타나지 않았으며 손톱 표면수분량에서는 0%아세톤의 경우 젤네일 제거 전 후 감소가, 경피수분증발량에서는 0%아세톤의 경우 젤네일 제거 전 후 증가가 가장 적은 것으로 나타났다. 결론적으로 5%, 0%아세톤이 젤네일을 제거하는 리무버액으로 사용이 가능하며 손톱 손상에 영향이 제일 적은 것으로 나타났다. 본 연구가 비아세톤계 리무버 제품 개발과 네일 미용 발전에 기초 자료로 활용되기를 기대한다.

• 반도체디스플레이기술학회지
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• 제7권3호
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• pp.35-39
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• 2008

We study the interaction of acetone molecule $[(CH_3)_2CO]$ on Si(001) surface using density functional theory. An acetone molecule is adsorbed on a Si atom of the Si dimer of the Si(001) surface. The adsorption of the acetone molecule on the Si atom at lower height between the two Si atoms of the dimer is more favorable than that on the Si atoms at upper height. Then we calculate an energy variation of dissociation and four-membered ring structures of the acetone molecule adsorbed on the Si surface. Total energy difference between the two structures is about 0.05 eV, indicating that the two structures are almost equally stable. Energy barrier exists when a hydrogen atom is dissociated and adsorbed on the other Si atom of the dimer, while energy barrier does not exist when the adsorbed acetone molecule changes to four-membered ring structure, except for the rotation of the acetone molecule along z-direction. Therefore, four-membered ring structure is kinetically more favorable than the dissociation structure when the acetone molecule is adsorbed on the Si(001) surface.

• 한국연초학회지
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• 제20권2호
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• pp.178-182
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• 1998

Previously, we showed that acetone enhanced aryl hydrocarbon hydroxylase (AHH) activity in only 3-methylcholanthrene (MC)- or $\beta$-naphtoflavone (BNF)-inducible microsomes of rat liver. In the present study, the possible mechanism underlying acetone action on AHH was investigated in the liver microsomes from MC-pretreated rats. Other n-alkylketones except acetone did not increase AHH activity, which rather decreased significantly with the length of alkyl side chain. Acetone had no effect on the activity of NADPH-cytochrome P450 reductase or inhibited the formation of 3-OH benzo(a)pyrene (B(a)P) in nonenzymatic model ascorbic acid system. However, in cumene hydroperoxide (CuOOH)-supported B(a)P hydroxylation, acetone enhanced its velocity remarkably by 30% at the optimal concentration (30 $\mu$M CuOOH and 1.0% acetone). From these results, we conclude that acetone may facilitate the formation of an activated oxygen species or the insertion of oxygen into B(a)P molecule in CYP1A rich microsomes.

• 생태와환경
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• 제41권4호
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• pp.485-489
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• 2008

Algal chlorophyll-$\alpha$ is commonly determined by spectro-photometric method using 90% acetone as solvents. However, acetone has low extraction efficiency without grinding filters, and DMF (dimethyl formamide) was tested for the compatibility with acetone. Chlorophyll-$\alpha$ concentration was determined for samples from 5 reservoirs of different trophic states and phytoplankton composition, using acetone extraction with grinding and DMF without grinding. Chlorophyll-$\alpha$ measured by DMF and Acetone did not show a significant difference when using trichromatic method of UNESCO and Lorenzen, and therefore, DMF can substitute acetone. But when acidification method was applied, they showed significant difference of 8%. It can be concluded that DMF can extract chlorophylls more effectively without grinding and it can be a better alternative for the standard extraction solvent.

• 한국미생물·생명공학회지
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• 제28권4호
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• pp.223-227
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• 2000

A novel two-step acetone treatment method was developed to enhance the enantioselectivity of Candida rugosa lipase (CRL) toward the hydrolysis of racemic naproxen methyl ester. The acetone-teated CRL was considerably more enantioselective than the crude CRL, yielding an enantiomeric excess of 98~100%. The crude and acetone-treated CRLs were subjected to anion exchange chromatography, and their chromatography profiles were compared. In consequence, both chromatography profiles were found to be almost identical, resulting in two separate lipase peaks (lipase A and B). The lipase B, which is known to be less enantioselective, was treated with acetone using a two-step treatment method. The enantioselectivity of acetone-treated lipase B was dramatically increased, yielding an enantiomeric excess of 99%.

• 한국환경농학회지
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• 제12권2호
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• pp.176-183
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• 1993

신규 살충제인 KH-502의 안전성을 조사하기 위하여 다양한 조건하에서 광(光) 분해(分解) 실험을 수행하였다. 이 실험에서 KH-502를 acetone 또는 acetonitrile 용액에 첨가한 뒤 태양광선 또는 자외선 $(300{\sim}350nm)$을 조사(照射)하였고, acetone 또는 acetonitrile 용액에는 수분함량, 산소함량이 달랐으며, 부식산,rosebengal 또는 tryptophan이 첨가 되었다. KH-502의 안전성 및 분해경향에 대한 결과를 요약하면 다음과 같다. 1. KH-502의 광분해(光分解)는 자외선을 조사(照射)한 경우와 그렇치 않은 경우에 매우 유의성있는 차이를 보여 주었다. KH-502는 acetone 용매에서 광관여효과에 의해 광분해(光分解)되었으나, acetonitrile 용매 하(下)에서는 광분해되지 않았다. 2. KH-502의 광분해 경향은 열 분해 경향과 판이하게 달랐으며, 광분해산물은 KH-502 oxo형, S-ethyl KH-502, PTMHP 및 몇가지 미지물질 등이었다. 3. acetone 또는 acetonitrile에 첨가된 부식산, rosebengal, tryptophan은 KH-502의 광분해에 광관여효과를 나타내지 않았다. acetone 용매의 용존산소는 acetone과 함께 경쟁적으로 광관여효과를 나타내어 KH-502의 분해를 촉진시켰다. 4. acetone 용매를 부식산 또는 논물로 처리했을때, KH-502의 광분해는 감소하였다.