• 한국식품위생안전성학회지
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• 제13권1호
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• pp.6-13
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• 1998

해양미생물로부터 사람 Low Density Lipoprotein(LDL)에 대한 항산화 활성 균주를 검색 하였든 바 부산 인근연안에서 항산화 활성이 높은 Bacillus sp. RH-5를 분리 동정하였다. Bacillus sp. RH-5의 항산화 활성물질의 생산 최적 배지는 1.0% glucose, 0.25% polypeptone, 0.25% yeast extract, 0.01% $FeSO_4{\cdot}7H_2O$, 50% sea water 이였다. 이때 최적 조건은 pH 7.0, 배양오도는 $30^{\circ}C$ 및 배양시간은 48시간에서 항산화 활성이 가장 높았다. 사람 LDL을 $1~5\;\mu\textrm{M}\;CuSo_4$ 존재하에서 산화 시킨 결과 Bacillus sp. RH-5 배양액의 ethyl acetate 추출물의 500 및 $1,000\;\mu\textrm{g}/ml$에서 산화가 억제되었으며 또 $5\;\mu\textrm{M}\;CuSo_4$ 존재하에서 산화 시킨 LDL의 전기 영동거리는 native LDL 보다 다소 높았으나 LDL에 ethyl acetate 추출물을 첨가한 경우 그 이동거리는 native LDL과 거의 비슷하였다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권12호
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• pp.5119-5124
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• 2015

Background: HPV vaccination in Singapore is voluntary and physician prescription-based. This study investigated the current status and intention for HPV vaccination among Singapore nurses. Materials and Methods: All female nurses in a general hospital were given an anonymous questionnaire on HPV vaccination experience and intention of vaccinating their daughters. The influence of age, knowledge and perceived-risk of cervical cancer, and cultural background on mother's intention of vaccinating their daughters was analyzed. Results: Of 2,000 nurses, 1,622 (81.1%) responded and analysis was performed on 1,611 with valid data. They showed good awareness on association of cervical cancer with multiple sexual partners (81.9%), history of sexually transmissible diseases (78.2%), and history of genital warts/HPV infection (73.5%), and on cervical cancer preventive effects of HPV vaccination (54.6%). The prevailing misconceptions of the vaccines were: investigational nature (38.9%), side effects (27.9%) and indicated for women at high risk for cervical cancer (20.5%). Conclusions: Misconceptions on the nature, role and safety of HPV vaccines low vaccine up-take rates and daughters. Dissemination of adequate and accurate HPV vaccine information and a review for school-based vaccination are needed for optimal delivery of HPV vaccines in Singapore.

• Biotechnology and Bioprocess Engineering:BBE
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• 제6권1호
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• pp.25-30
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• 2001

Viral safety is a prerequisite for manufacturing clinical albumin and immunoglobulins from human plasma pools. This study was designed to evaluate the efficacy of cold ethanol fractionation and pasteurization (60$\^{C}$ heat treatment for 10h) for the removal/inactivation of human immunodeficiency virus type 1 (HIV-1) during the manufacturing of albumin and immunoglobulins. Samples from the relevant stages of the production process were spiked with HIV-1, and the amount of virus in each fraction was quantified by the 50% tissue culture infectious dose(TCID(sub)50). Both fraction IV fractionation and pasteurization steps during albumin processing were robust and effective in inactivating HIV-1, titers of which were reduced from an initial 8.5 log(sub)10 TCID(sub)50 to undetectable levels. The log reduction factors achieved were $\geq$ 4.5 and $\geq$ 6.5, respectively. In addition, fraction III fractionation and pasteurization during immunoglobulins processing were robust and effective in eliminating HIV-1. HIV-1 titers were reduced from an initial 7.3 log(sub)10 TCID(sub)50 to undetectable levels. The log reduction factors achieved in this case were $\geq$ 4.9 and $\geq$ 5.3, respectively. These results indicate that the process investigated for the production of albumin and immunoglobulins have sufficient HIV-1 reducing capacity to achieve a high margin of safety.

• 한국의료질향상학회지
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• 제21권1호
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• pp.36-49
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• 2015

In Intensive Care Units (ICUs), where severely ill patients are treated, importance of reducing Hospital Acquired Infection (HAI) cannot be overstated. One of the simplest and most effective actions against HAI is proper hand hygiene (HH) behavior of Health Care Workers (HCWs). However, compliance varies across different cultures and different job types of HCWs (physicians, residents and nurses). This study aims to understand determinants of HH behavior by HCWs' job types in Korea. Qualitative analysis was performed based on Reasoned Action Approach style interviews with staff physicians, residents and nurses across 7 teaching hospitals. We found that all HCWs strongly believe HH is important in reducing HAI. There were, however, job type-specific HH behavior modifying factors; staff physicians stated feeling pressure to be HH behavior role model. Residents identified Quality Improvement team that measured compliance as a facilitator; a notable barrier for residents was senior physicians not washing their hands, because they were afraid of appearing impudent to their seniors. Nurses designated their chief nurse as a key referent. All participants mentioned heavy workload and lack of access to alcohol-based sanitizer as situational barriers, and sore and dry hand as deterrents to HH compliance.

• 한국수정란이식학회지
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• 제32권4호
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• pp.275-285
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• 2017

Lysophosphatidic acid (LPA) is an important signaling molecule. Here, the effect and mechanism of LPA on the preimplantation development of porcine embryos during in vitro culture (IVC) was examined. Porcine embryos were cultured in porcine zygote medium (PZM-3) supplemented with $30{\mu}M$ LPA during different days. There was a significantly higher cleavage rate in Day 1-7 and significantly higher total cell number of blastocysts in Day 1-3 and Day 4-7. It was also found that messenger RNA (mRNA) expression level of PCNA, BCL2 and BAX in blastocysts obtained from D1-7 group were significantly higher and BCL2/BAX mRNA ratio in D1-3 group was significantly lower than control group but Day 4-7 and Day 1-7 groups were comparable with control group. Treatment with $20{\mu}M$ PLC inhibitor significantly decreased the embryo cleavage rate and blastocyst formation rate. Moreover, LPA as an activator of PLCs, enhanced the $30{\mu}M$ LPA + $20{\mu}M$ U73122 group embryo cleavage rate which similar with control group. In conclusion, the results suggest that treatment with LPA during IVC improves the porcine early embryo cleavage by activation of PLC signaling pathway and regulate the mRNA expression that contribute to total cell number of blastocysts during blastocyst formation.

• 한국식품위생안전성학회지
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• 제12권3호
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• pp.181-187
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• 1997

Lactobacillus acidophilus NCFM, Lactobacillus casei YIT 9018, Bifidobacterium longum 8001, and Bifidobacterium longum 8025 at the level of 106 cfu/$m\ell$ were cultured with 104 cfu/$m\ell$ of Escherichia coli O157:H7 KSC 109 or Salmonella typhimurium ATCC14028, in order to verify the effects of lactic acid bacteria and bifidobacteria on the growth of the pathogens. In the mixed culture of lactic acid bacteria with E. coli O157:H7 KSC 109, Growth inhibition and atypical microcolonies of E. coli O157:H7 KSC 109 were observed. The pathogens inoculated grew for 5 hors (pH 5.3), by the time L. acidophilus NCFM reached the exponential growth phase, and then the surviving pathogens were decreased to 101 cfu/$m\ell$ after 35 hours. When L. caseiYIT 9018 was grown with the pathogens, they grew for 10 hours (pH 4.6), by the time L. casei YIT 9018 reached the end of exponential growth phase, and then the surviving pathogens were decreased drastically. Up to the stationary growth phase of lactic acid bacteria, L. acidophilus NCFM exhibited stronger inhibition against the pathogens than L. casei YIT 9018 did, which might be attributed to its faster growth. Likewise bifidobacteria inhibited the growth of the pathogens tested, bifidobaceria was weaker in the inhibitory activity than lactic acid bacteria. When Bifidobacterium longum 8001 was cultured with the pathogens, E. coli O157:H7 KSC 109 was gradually ingibited at the stationary growth phase of bifidobacteria, atypical microcolonies were formed on Levine EMB medium after 48 hours, and Salmonella grew up to 106 dfu/$m\ell$, then was drastically ingibited at the exponential growth phage of Bifidobacterium longum 8001. But when Bifidobacteriuam longum 8025 was cultured with the pathogens, the pathogens grew to the same level of Bifidobacteriuam longum 8025 was cultured with the pathogens, the pathogens grew to the same lever of Bifidobacteriuam longum 8025 after 10 hours, then the surviving pathogens were decreased drastically.

• 한국식품위생안전성학회지
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• 제3권2호
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• pp.75-81
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• 1988

본 실험은 Staphylococcus aureus 로부터 생성되는 enterotoxi B 의 분리 및 정제를 위하여 각종 분리방법을 비교 조사하였다. 배지로부터 Entrotoxin B를 추출하는 방법중 Amberlite CG-50 수지가 가장 간편하고 빠른 방법이었고 CM 수지는 Amberlite 수지에 비해 용출력이 떨어졌으며 분리할 수 있는 toxin의 양은 적었으나 정제도에 있어서는 약 75%로 toxin을 분리하는 처음 단계로서는 높은 편이었다. CM column을 Gradient 용출법으로 사용했을 때에는 하나의 column을 사용해 분리한 분리물 중 정제도가 85%로 가장 높았고, 용출 buffer의 농도 폭을 넓히는 것이 정제도를 높이기 위한 바람직한 방법이었다. 이 실험에 사용한 Sephadex G-50 , 75, 100, Sephacryl, Ultro gel 등의 gel filtration 방법 중 Ultro gel 에 의한 분리방법이 정제도에 있어서는 가장 우수했으며, 이온 교환 수지를 먼저 사용한 분리물에서는 모두 90% 이상의 toxin을 얻을수 있었지만, 한번의 분리도 거치지 않은 배지는 분리도와 정제도에서 현저히 떨어졌고, Sephadex G-50 은 gel colunm중 정제도가 가장 낮았다. FPLC는 위의 분리 ·정제 방법중 가장 빠른 방법이며, 적은 양의 시료로도 측정이 가증하였고, 정제도는 95% 이상이었다.

• 한국식품위생안전성학회지
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• 제5권1호
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• pp.27-34
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• 1990

유산균이 생성하는 다당류에 관한 연구의 일환으로서 발효유 제품의 종균으로 널리 사용되고 있는 Str. themophilus, Lb. bulgaricus, Lb. casei 등을 10% 환원멸균 탈지유에 배양하면서 다당류 생성에 따른, 우유 배양액 점도의 경시적 변화 및 다당류의 최적 생성 조건에 대하여 조사하였다. 1. 시험균 중에서 Str. thermophilus 510이 가장 높은 점도를 나타냈으며 $41^{\circ}C$ 배양 5일째에 5,000 CP로서 다른균에 비해서 1,000 CP 이상 높았다. 2. 인공합성배지를 사용하여 흡광도를 측정한 결과 $41^{\circ}C$에서의 흡광도가 가장 높았으며 다당류 합성을 위한 탄소원으로서는 Sucrose의 이용성이 1~5% 농도에서 가장 높았다. 3. 다당류 합성효소의 금속염에 대한 영향을 살펴본 결과 $Mg^{++}$의 효과가 인정되었다.

• Clinical and Experimental Reproductive Medicine
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• 제43권4호
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• pp.247-252
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• 2016

Objective: Heparin can modulate proteins, and influence processes involved in implantation and trophoblastic development. This study aimed to assess the improvement of clinical pregnancy and implantation rates after local intrauterine injection of low-molecular-weight heparin (LMWH) in patients undergoing intracytoplasmic sperm injection (ICSI). Methods: A randomised case/control design was followed in women scheduled for ICSI. The study arm was injected with intrauterine LMWH during mock embryo transfer immediately following the ovum pickup procedure, while the control arm was given an intrauterine injection with a similar volume of tissue culture media. Side effects, the clinical pregnancy rate, and the implantation rate were recorded. Results: The pregnancy rate was acceptable (33.9%) in the LMWH arm with no significant reported side effects, confirming the safety of the intervention. No statistically significant differences were found in the clinical pregnancy and implantation rates between both groups (p= 0.182 and p= 0.096, respectively). The odds ratio of being pregnant after intrauterine injection with LMWH compared to the control group was 0.572 (95% confidence interval [CI], 0.27-1.22), while the risk ratio was 0.717 (95% CI, 0.46-1.13; p= 0.146). No statistical significance was found between the two groups in other factors affecting implantation, such as day of transfer (p= 0.726), number of embryos transferred (p= 0.362), or embryo quality. Conclusion: Intrauterine injection of LMWH is a safe intervention, but the dose used in this study failed to improve the outcome of ICSI. Based on its safety, further research involving modification of the dosage and/or the timing of administration could result in improved ICSI success rates.

• 재활복지공학회논문지
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• 제11권2호
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• pp.125-132
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• 2017

환자의 혈전증 예방을 위하여 사지압박순환장치가 사용되어지고 있으나 잦은 고장으로 인한 불만이 많다. 이에 본 연구에서는 사지압박순환장치의 고장의 발생 원인을 파악하고 제품요인, 간호사요인, 환자요인 그리고 시스템요인에 대하여 다양한 개선 활동을 시행하였다. 그 결과로 각각의 요인에 대한 지표의 개선효과를 볼 수 있었으며, 기기의 불량률을 줄일 수 있었다. 보다 적극적인 의료기기의 개선 활동은 기기의 불량률을 줄이는데 기여할 수 있으며, 이를 통해 의료 서비스의 품질 개선 및 안전한 의료문화를 이루는데 도움이 될 수 있을 것으로 사료된다.