• Title/Summary/Keyword: 세균성

Search Result 3,622, Processing Time 0.034 seconds

A CONTROL OF PLAQUE, GINGIVITIS AND ANTI-CARIES EFFECT OF DENTIFRICE CONTAINING HORSERADISH EXTRACTS (서양산 고추냉이 추출물이 함유된 세치제의 효능에 대한 임상적 실험연구)

  • Seo, Hyun-Woo;Park, Ho-Won;Kim, Jong-Soo;Lee, Si-Young;Shin, Il-Shik
    • Journal of the korean academy of Pediatric Dentistry
    • /
    • v.39 no.1
    • /
    • pp.26-33
    • /
    • 2012
  • The purpose of this study was to find out the effect of dentifrice containing Horseradish (Armoracia rustica) root extracts on improvement of oral hygiene. The clinical evaluation was done participated by 80 adults volunteers who provided a informed consent for their participation. The participants were divided into two groups ; control group (using toothpaste without Horseradish extracts) and experimental group (using toothpaste containing Horseradish extracts). The checklist of the experiment includes the plaque index, gingival index and anti-caries activity. The anti-caries activity was measured by cultivating Streptococcus mutans for 48 hours then estimating the number of increased bacteria using Dentocult SM. The double-blind method was used in this study. The results of this study can be summarized as follows; 1. The plaque formation decreased 28% in control group, 58% in experimental group using dentifrice with Horseradish extracts compared to baseline data. 2. For gingival index, control group and experimental group showed 26% and 40% decrease compared to baseline data, respectively. 3. The score of caries activity test decreased by 4% for control group and 69% for experimental group compared to baseline data. According to the results, a dentifrice containing Horseradish extracts can improve oral hygiene.

Perchlorate Removal by River Microorganisms in Industrial Complexes (산업단지지역 하천 미생물에 의한 퍼클로레이트 제거)

  • Jo, Kang-Ick;Ahn, Yeonghee
    • Korean Chemical Engineering Research
    • /
    • v.52 no.1
    • /
    • pp.92-97
    • /
    • 2014
  • Perchlorate ($ClO_4^-$) is an emerging contaminant of soil/groundwater and surface water. $ClO_4^-$ has been shown to inhibit iodide uptake into the thyroid gland and cause a reduction in thyroid hormone production. $ClO_4^-$ is highly soluble and very stable in water. Biodegradation by $ClO_4^-$-reducing bacteria (PRB) is considered the most important factor in natural attenuation of $ClO_4^-$. Rivers in an industrial complex have potential to be contaminated with $ClO_4^-$ discharged from point or non-point sources. In this study, water samples were taken from the rivers running through the Gumi industrial complexes and used for batch test to analyze $ClO_4^-$-degradation potential of river microorganisms. The results of 83-h batch culture showed that $ClO_4^-$-removal efficiency of all samples was 0.77% or less without addition of an external electron ($e^-$) donor. However $ClO_4^-$-removal efficiency was higher when an $e^-$ donor (acetate, thiosulfate, $S^0$, or $F^0$) was added into the batch culture, showing up to 100% removal efficiency. The removal efficiency was various depending on type of $e^-$ donor and site of sampling. When acetate was used as an $e^-$ donor, the highest $ClO_4^-$-removal efficiency was observed among the $e^-$ donors used in this study, suggesting that activity of heterotrophic PRB was dominant. The results of this study provide basic information on natural attenuation of $ClO_4^-$ by river microorganisms. The information can be useful to prepare a strategy to enhance efficiency of $ClO_4^-$ biodegradation for in situ bioremediation.

A simple colorimetric method for the clinical evaluation of caries activity in adults (성인의 치면세균막 내 산생성능력과 치아우식경험과의 연관성)

  • Kim, Hyo-Jung;Ku, Hye-Min;Lee, Eun-Song;Kwon, Ho-Keun;Kim, Baek-Il
    • The Journal of the Korean dental association
    • /
    • v.55 no.6
    • /
    • pp.413-422
    • /
    • 2017
  • Purpose: The aim of this study was to confirm the validity of the $Cariview^{TM}$, test in adults by assessing correlations between $Cariview^{TM}$, scores and caries experience using a quantitative light-induced fluorescence (QLF) technique. Methods: This retrospective cross-sectional study included 111 patients aged 19-64 years who visited a dental clinic in Seoul from 2015 to 2016, and underwent the $Cariview^{TM}$, test and had their teeth photographed with the Qraycam. Plaque was scraped with sterilized cotton swabs, and then placed in a culture medium and incubated at $37^{\circ}C$ for 48 h. Finally, the degree of color change was evaluated, and scored on a 0-100 point scale. Caries experience index included not only cavitated lesions but also early caries that were detected on white and fluorescence images. Participants were divided into low, moderate and high caries risk groups according to the $Cariview^{TM}$, score, and caries experience was compared between risk groups using ANCOVA. Spearman correlation coefficients were calculated to analyze the associations between $Cariview^{TM}$, scores and caries indices. Result: The mean age of the participants was 40 years, and the mean $Cariview^{TM}$, score was $53.6{\pm}20.7$. The WDMFT and the DMFT indices significantly increased with caries risk, and this increase was significantly different between the low- and high-risk groups. The $Cariview^{TM}$, test scores were significantly correlated with the WDMFT (r = 0.28, P = 0.003) and DMFT (r = 0.29, P = 0.002) indices. Conclusion: The $Cariview^{TM}$, test could be a clinically useful and simple method for assessing caries risk in adults.

  • PDF

Factors Related to Patients' Satisfaction Level of Treatment Outcome of Oral Malodor (구취치료 후 만족도에 영향을 미치는 예견인자)

  • Lee, Jeong-Yun;Kho, Hong-Seop;Kim, Young-Ku;Chung, Sung-Chang;Lee, Sung-Woo
    • Journal of Oral Medicine and Pain
    • /
    • v.26 no.1
    • /
    • pp.27-38
    • /
    • 2001
  • 본 연구에서는 환자들에 의해 구취와 관련이 있다고 일반적으로 믿어지고 있는 여러 요인들이 치료 후의 환자의 만족도에 미치는 영향에 대해 알아봄으로써 환자의 만족도의 예후를 판단할 수 있는 자료를 마련하고자 하였다. 서울대학교 치과병원 구강진단과에 구취를 주소로 내원한 환자 194명을 대상으로 설문지를 이용하여 구취와 관련성이 있는 것으로 알려져 있는 항목들을 조사하였다. 조사 항목으로는 1) 본인확인가능여부, 2) 타인확인가능 여부, 3) 구취의 기간, 4) 구취의 빈도, 5) 축농증, 6) 비염, 7) 코수술 병력, 8) 콧물이 목뒤로 넘어감, 9) 코막힘, 10) 비호흡 곤란, 11) 구강건조감, 12) 편도선부종, 13) 가래, 14) 신물의 역류, 15) 소화불량, 16) 흡연여부가 포함되었다. 구취의 평가는 portable sulfide monitor인 $Halimeter^{(R)}$(Interscan Co., Chatsworth, CA, USA)를 이용하여 치료 전, 후에 각각 측정하였고, 혀배면의 세정, 치면 세균막 조절, 0.25% $ZnCl_2$ 양치액의 사용을 내용으로 하는 구취의 치료를 시행한 뒤 자신의 구취개선정도에 대해 %로 질문하여 치료 후 만족도를 조사하였다. 각 조사 항목과 치료 후 만족도 사이의 상관관계 및 실제 $Halimeter^{(R)}$ 수치의 개선정도와 만족도 사이의 상관관계를 분석하였으며, Symptom Checklist - 90 Revised(SCL-90R)의 분석결과에 따라 환자를 두 그룹으로 분류하고 두 그룹 사이의 치료 후 만족도의 차이를 조사한 결과 다음과 같은 결론을 얻었다. 1. 본인 및 타인 확인가능여부, 구취가 항상 나는지 여부, 구취의 기간, 축농증, 비염, 코수술 병력, 코막힘, 비호흡 곤란, 콧물이 목뒤로 넘어감, 흡연여부에 따른 치료 후 만족도의 유의한 차이는 없었다. 2. 신물의 역류(p=0.003), 소화불량(p=0.007), 구강건조감(p=0.016), 편도선 부종(p=0.018), 가래(p=0.033)에 따른 치료 후 만족도는 통계적으로 유의한 수준의 차이를 보였다. 3. $Halimeter^{(R)}$ 수치의 개선정도와 만족도 사이의 유의한 상관관계는 관찰되지 않았다(r=0.092, p=0.201).

  • PDF

The Effect of Acute Sinusitis on the Ultrastructure and Sialic Acid Distribution on the Sinus Mucosa Cell Surface of the Rabbit (실험토끼 상악동염이 상피세포 표면의 미세구조변화와 Sialic acid의 분포에 미치는 영향)

  • Kim, Soo-Jin;Lee, Eun-Jung
    • Applied Microscopy
    • /
    • v.32 no.2
    • /
    • pp.163-170
    • /
    • 2002
  • Experimatal maxillary sinusitis was induced in New Zealand white rabbits by blocking the maxillary sinus ostium. The distribution of lectin receptors was explored in the mucosa with induced maxillary sinusitis using colloidal gold label complex with lectin WGA purified from wheat germ (Triticum vulgaris). The lectin WGA gold complex, shown to recognize GlcNac (N-acetylglucosamine) and NeuNAc (N-acetylneuraminic acid) regions, was applied to detect binding sites in Lowicryl HM 20 sections and viewed under the electron microscope. An increased height of the cylindric cells, ciliary loss and hyperplasia of the secretory cells were observed. Examination of normal sinus mucosa labeled with gold-labeled lectins showed the distribution of sialoglycoconjugates to be mainly in the ciliary layer and the granules in the secretory cells. Inflamed mucosa had increased labeling intensity of gold-labeled WGA in the cilia and the secretory granules. These results indicate that lectin WGA receptors are located in the cilia and secretory granules. Specific changes in the lectin binding pattern were apparent in the inflamed mucosa in the experimentally induced acute sinusitis, in comparison with normal mucosa, conceivably as a part of host defense reactions.

Comparative Study of the Biological Activity of Propolis Extracts with Various Countries of Origin as Cosmetic Materials (원산지별 프로폴리스 추출물의 화장품 소재로서의 생리활성 비교연구)

  • Jung, Eunsun;Weon, Jin Bae;Ji, Hyanggi;You, Jiyoung;Oh, Se-young;Kim, Hayeon;Xin, Yingji;Kim, Eun Bin;Heo, Kang-Hyuck;Park, Deokhoon
    • Journal of the Society of Cosmetic Scientists of Korea
    • /
    • v.46 no.2
    • /
    • pp.159-166
    • /
    • 2020
  • Propolis is a sticky resinous substance that is formed by the combination of honeybee secretions and resin of plants, which serves to protect from bacteria and viruses. This study aims to evaluate the efficacy of propolis extract from Korea (KPE), China (CPE), and Brazil (BPE) through antioxidant, antibacterial, whitening, and anti-inflammatory tests, and to examine their potential as cosmetic materials. KPE, CPE, and BPE showed significant antioxidant activities on flavonoid/polyphenol content and free radical scavenging activity. The antibacterial effect of propolis on skin flora was determined by measuring the minimal inhibitory concentration (MIC). KPE showed better antibacterial efficacy than CPE and BPE in C. acnes (KPE, CPE, and BPE: (62.5, 250, and 500) ㎍/mL, respectively). Furthermore, KPE inhibited the melanin synthesis in human epidermal melanocytes and production of nitric oxide and PGE2 induced by lipopolysaccharide (LPS) in mouse macrophages, which showed better than did CPE or BPE. Taken together, the propolis extracts can be applied to antioxidant, antibacterial, and anti-inflammatory ingredient for cosmetics, while KPE showed superior potential in antibacterial, anti-inflammatory, and whitening efficacies.

Effect of heat treatment on quality characteristics and antioxidant activity of Korean traditional actinidia (Actinidia arguta) cultivars puree (열처리 조건이 토종 다래 (Actinidia arguta) 퓨레의 품질 특성 및 항산화활성에 미치는 영향)

  • Kim, Ahna;Kang, Sung-Won;Heo, Ho-Jin;Chun, Ji-Yeon;Choi, Sung-Gil
    • Food Science and Preservation
    • /
    • v.22 no.3
    • /
    • pp.408-420
    • /
    • 2015
  • This study investigated the effect of heat treatment conditions on the quality and antioxidant activities of Korean traditional actinidia (Actinidia arguta) cultivars puree. Heat treatment on actinidia puree was conducted at $70{\sim}90^{\circ}C$ for 1 min to 5 mins, while a control sample of the actinidia puree was prepared without heat treatment. In all the samples, except for the sample treated at $90^{\circ}C$ for 5 mins, pH and Brix degree was not dramatically changed. Pulp content decreased with increasing temperature and time. L and the a value of color increased with increasing temperature and time. However, the b value showed a reverse tendency with L and the a value. Viscosity and gumminess increased as heat temperature and time increased, though cohesiveness was not significantly changed depending on temperature and time. Coliform and yeast were not detected on all samples and the number of aerobic bacteria and mold decreased as temperature and time increased. Vitamin C and total phenolic content of the puree was not changed for 1, 3, and 5 mins at $70^{\circ}C$ and for 1 and 3 mins at $80^{\circ}C$, but significantly decreased with increasing time at $90^{\circ}C$. Furthermore, the antioxidant activities of the puree, such as DPPH radical scavenging activity, ABTS radical scavenging activity, and FRAP (ferric reducing antioxidant power) showed a similar tendency with total phenolic content.

Effect of continuous pulsed electric fields treatments on quality of apple juice (사과주스의 품질에 미치는 pulsed electric field 연속 처리효과)

  • Ahn, Seong-Hwan;Lim, Jeong-Ho;Kim, Young-Ho;Chung, Suk Jin;Park, Kee-Jai
    • Food Science and Preservation
    • /
    • v.20 no.5
    • /
    • pp.650-658
    • /
    • 2013
  • Apple juices were sterilized by continuous pulsed electric field (PEF) treatments of pulse width of 25 ${\mu}s$ at electric field intensity of 20.0 kV/cm, and with the varied pulse frequencies of 35 Hz (40 kJ/L), 55 Hz (70 kJ/L), 72 Hz (100 kJ/L) and 85 Hz (130 kJ/L). The PEF treatments of apple juice reduced the microbial counts from 5.3 log CFU/mL of initial state to 3.0 log CFU/mL after PEF treatment at energy density of 130 kJ/L. Also yeast and fungi after PEF treatments were reduced from 5.3 log CFU/mL to 3.0 log CFU/mL and Escherichia coli were from 5.3 log CFU/mL of initial state to 4.7 log CFU/mL to < $10^1$ CFU/mL. The soluble solids and free sugars did not significantly differ (p<0.05) depending on conditions of PEF treatment. The total phenolic contents and antioxidant activity such as the DPPH and ferric reducing antioxidant power (FRAP) by PEF treatments were significantly partly reduced, but the PEF-reduced value came in smaller quantities than the heat treatment at $65^{\circ}C$. The iterative PEF treatments with pulse width of 25 ${\mu}s$ and pulse frequency of 85 Hz at electric field intensity of 20.0 kV/cm showed limited in microbial reduction. Also, total phenolic contents and antioxidant activity such as DPPH and FRAP, significantly decreased depending on treatment numbers of PEF (p<0.05).

Quality characteristics of Doenjang prepared with sweet potato (고구마를 이용한 된장의 품질 특성)

  • Cha, Su-Jin;Park, Sao-Ra;Kim, Dong-Han
    • Food Science and Preservation
    • /
    • v.24 no.2
    • /
    • pp.221-229
    • /
    • 2017
  • The effect of sweet potato on the quality of Doenjang was investigated during fermentation. Viable cells of yeast decreased gradually after 4 weeks of fermentation, but those of aerobic bacteria increased in the late stage. Amylase activity of Doenjang was higher in the late stage of fermentation, while neutral protease maintained high activity during fermentation. Hunter L and b values of Doenjang decreased gradually during fermentation, while a value was increased. The pH of Doenjang decreased gradually until 10 weeks of fermentation, and the titratable acidity was low in the sweet potato added groups. The acid value was low in the Shinyulmi sweet potato added Doenjang. Water activity and oxidation-reduction potential of Doenjang decreased during fermentation. Reducing sugar of Doenjang decreased in the middle stage of fermentation, and it was low in sweet potato added groups. The alcohol content of Doenjang decreased after 2 weeks of fermentation. Amino and ammonia-type nitrogen of Doenjang increased during fermentation and reached the maximum after 10 and 12 weeks of fermentation, respectively. After 12 weeks fermentation, 8% of Shinyulmi sweet potato added Doenjang was more favorable taste, flavor and overall acceptability (p<0.05) than the control or the Yeonwhangmi sweet potato added groups.

Biological Activities of Extracts from Omija(Schizandra chinensis Baillon) (오미자 추출물의 생리활성)

  • Kwon, Hoo-Ja;Park, Chan-Sung
    • Food Science and Preservation
    • /
    • v.15 no.4
    • /
    • pp.587-592
    • /
    • 2008
  • We research the development of natural preservatives or functional foods. Here Omija(Schijandra chinensis Baillon) was extracted with distilled water and 70%(v/v) ethanol, and extracts were tested for biological(antibacterial, antioxidative, and fibrino lytic) activities. The polyphenol contents of water and ethanol extracts were 511.5 and 696.6 mg/100 g of Omija, respectively. The water and ethanol extracts from Omija demonstrated antibacterial activity against Listeria monocytogenes and Staphylococcus aureus. The electron-donating abilities(EDAs) of the water and ethanol extracts were 88.6% and 94.5% at 1,000 ppm. The superoxide dismutase(SOD)-like activities of the water and ethanol extracts were 51.2% and 53.6% at 1,000 ppm. The nitrite scavenging abilities(NSAs) of the water and ethanol extract were 70.2% and 76.2% at 1,000 ppm, and were the highest at pH 1.2. The higher antibacterial and antioxidative activities were seen in the ethanol extract, which also had a higher polyphenol content than did the water extract. However, fibrinolytic activities of the water extract were higher than those of the ethanol extract, at all dilutions in the range $1.25{\sim}50%$(v/v). We conclude that extracts of Omija can be used for health food development or natural preservatives in processed foods.