• Proceedings of the Korean Institute of Industrial Safety Conference
• /
• 2003.05a
• /
• pp.462-467
• /
• 2003

Organic solvent를 원료로 한 액상 세척제는 가전제품, 컴퓨터용품, 전기기구 세척등의 민수 용품과 산업용 정밀 기계부품과 같은 대상물 세척 등에 사용되고 있다. 그러나 일반 유기용제를 주성분으로 한 유기용제형 세척제의 경우 장기 오염물질에 따른 세척력 저하, 공정상 VOC(Volatile Organic Compound)가 과도 발생할 뿐만 아니라 비생분해성, 높은 증기압, 화재 및 폭발 위험성, 냄새 성분 발생 등 안전 및 보건상 치명적인 결함이 있다.(중략)

• Journal of Environmental Health Sciences
• /
• v.18 no.2
• /
• pp.1-2
• /
• 1992

실험기구의 청결도는 실험 및 분석에 있어서 생명과 같이 중용한 것으로 실험실에서 초자기구와 그외 기구, 그리고 장비 등을 사용하는 연구자와 실험요원들이 원하는 바는 이 기구들이 완전히 청결한 상태를 유지하는 것이다. 눈에 보이지 않는 찌꺼기들은 시료분석의 오차를 유발하고, 분리속도를 증가 또는 감소시키며, 미생물 실험에 있어서는 2차 감염이나 배양물 성장저해 그리고 신속성이 낮아지는 결과 등 많은 문제점을 초래하게 된다. 이러한 문제점을 해결하기 위하여 실험기구는 청결히 세척되어야 하며 어떠한 방해물질도 완전히 제거되어야 한다. 이는 바로 적절한 세척제를 선택하고 또한 효과적인 세척방법이 병행되어야 함을 뜻한다. 본 고에서는 세척제의 선택과 세척방법에 대하여 간략히 논해보고자 한다.

• The Journal of the Korean dental association
• /
• v.10 no.10
• /
• pp.697-699
• /
• 1972

저자는 Standardized foil technque으로 Aminefluoride를 함유한 MJ-148 구강세척제를 사용하여 치석형성을 관찰한 바 다음과 같은 결과를 얻었다. MJ-148은 대조군에 비하여 49%의 치석형성 억제 효과를 나타냈으며 이는 significant level 0.001이하이므로 치석형성 억제를 위한 구강 세척제로 사용될 수 있다.

• Journal of the korean veterinary medical association
• /
• v.7 no.4
• /
• pp.18-21
• /
• 1963

• Korean Journal of Materials Research
• /
• v.10 no.6
• /
• pp.445-449
• /
• 2000

Nickel ferrite $(Ni_{0.75}Fe_{2.25}O_4$ was synthesized by co-precipitation method in order to investigate its behavior under conditions of the reactor coolant system in pressurized light water nuclear power plants. Ammonia or potassium carbonate was used as a solution pH control agent, and aqueous ammonia or potassium carbonate solution or secondary distilled water was used as a co-precipitate washing agent. The effects of the pH control agent and the co-precipitate washing agent on the production yield on the basis of the Ni/Fe molar ratio and the particle characteristics of final products were investigated by XRD, SEM, EDX and XPS. The production yield was almost congruent with that of the initial aqueous mixture in case of using potassium carbonate as a pH control agent, while in case of using ammonia, it was quite changed. The difference seemed to be due to the effects of $Ni^{2+}{\leftarrow}NH_3$complexation in the aqueous solution and of the pH of co-precipitate washing agent.

• Journal of the Korean Chemical Society
• /
• v.65 no.6
• /
• pp.433-440
• /
• 2021

Surfactants are organic compounds that have both hydrophilic and non-polar parts in one molecule, classified as non-ion, anion, cation, and amphoteric surfactants according to the charge of hydrophilic parts in aqueous state. A trace amounts may remain when vegetables and fruits are washed using type1 detergent (Vegetable and fruit detergent), and there is a possibility of exposure to the human body through ingestion. This study developed the simultaneous analysis method for 5 surfactants with LC-MS/MS for analysis of detergent residues after washing vegetables and fruits with detergent. The mobile phase used distilled water and acetonitrile containing 50 mM ammonium formate and 0.1% formic acid and was analyzed using a gradient method using XBridge BEH C8 column. The accuracy of the established method was 83.9-112.1%, and the precision was less than 20%. The detection limit was 7.0 (SLS) to 29.0 (SLES-N3) ㎍/L, and the correlation coefficient (r²) of calibration line regression was greater than 0.99, it is considered suitable for the analysis of trace amounts of surfactant components remaining in vegetables and fruits.

• Journal of the Korean Society of Food Science and Nutrition
• /
• v.43 no.9
• /
• pp.1380-1387
• /
• 2014

The purpose of this study was to develop a mouthwash product with solid fermented oriental medicinal herb (OMH). Solid fermentation of magnolia, liquorice, and cnidium by Phellinus linteus mycelium was carried out successfully when 30% water was added to the medium, whereas 10% brown rice powder was required as an extra nutrient for solid fermentation of mint besides water. The amount of total phenol compounds and DPPH radical scavenging activity of OMH increased significantly (P<0.05) upon solid fermentation. Anti-microbial activities of fermented OMH also increased and were approximately 100-fold greater than those of unfermented samples. Oral pathogens such as Staphylococcus epidermis, Streptococcus pyogenes, Candida albicans, or Streptococcus mutans were used for determination of anti-microbial effects of OMH. Formulation of the mouthwash was developed based on the results of the sensory evaluation. Among seven formulas, the best formula chosen by the sensory evaluation was as follows: mouthwash prepared with 0.075% ethanol extract of solid fermented OMH as a main ingredient, 83.64% hot water extract of mint and clove (100:15, v/v) as a mouthwash base component, and other miscellaneous ingredients, including sodium fluoride, menthol, and surfactants. Data from a consumer's preference test with 30 participants, overall acceptance, and willingness to buy the product developed in this study were all significantly higher for the tested mouthwash compared to mouthwash on the market manufactured with OMH but with a different formula. Duration of freshness of the mouthwash after usage as determined by Breath Checker was not significantly different between the two samples, although the duration of our product was slightly longer than that of the commercial product mentioned above.

• Journal of the korean academy of Pediatric Dentistry
• /
• v.32 no.4
• /
• pp.595-603
• /
• 2005

Incomplete removal of bacteria contaminated dentin or enamel associated with caries is a potential problem in restorative dentistry Secondary or residual caries, pulpal inflammation and hypersensitivity may result from bacteria left after the initial preparation, especially if an adequate seal against microleakage is not obtained. A possible solution to eliminate residual bacteria left in a cavity preparation would be to treat the cavity with cavity disinfectant wash. But a potential problem with using a cavity disinfectant with dentin bonding agents could be their interference with the ability of the resin to bond to the tooth micromechanically. The purpose of this study was to evaluate the effect of 2% chlorhexidine containing cavity disinfectant ($Consepsis^{(R)}$) on shear bond strength and microleakage of dentin bonding agents, $Adper ^{TM}$ $Scotchbond^{TM}$ Multi-Purpose, $Adper^{TM}$ Single Bond and $Adper^{TM}\;Prompt^{TM}\; L-Pop^{TM}$ Sixty and sixty sound human third molar teeth, respectively, were used for shear bond strength and microleakage test. For experimental group, cavity disinfectant was applied before dentin bonding agents, and was not applied for the control group. The result from the this study can be summarized as follows ; 1. Use of 2% chlorhexidine containing cavity disinfectant($Consepsis^{(R)}$) does not significantly affect the shear bond strength of dentin bonding agents. 2. Use of 2% chlorhexidine containing cavity disinfectant($Consepsis^{(R)}$) does not significantly affect the microleakage of dentin bonding agents.

• The monthly packaging world
• /
• s.303
• /
• pp.61-65
• /
• 2018

• 월간낙농육우
• /
• v.27 no.11 s.307
• /
• pp.171-175
• /
• 2007