• Journal of Environmental Health Sciences
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• v.23 no.1
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• pp.62-65
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• 1997

The insecticidal and antibacterial activity of new synthesized carbamate derivatives(5,7-dibromo-8-hydroxyquinolinyl-N-methylcarbamate(I), 5,7-dibromo-8-hydroxyquinolinyl-N-ethylcarbamate(II)) was examined using 0.2w/v% acetone solutions and 50 $\mu$g/ml-1000 $\mu$g/ml N,N'-dimethylformamide H$_2$O(2:3) solutions of each compounds, respectively. 1. Two carbamates exerted insectiddal effects on Sogata furcifera HORVATH, Delphacodes Striatella FAUEN and Nilaparvate lugens STAL, Whereas no significant effects were observed on the Inazuma dorasalis MOISCHIULSKY Nephateffix apicalis Cincticeps UHLER. 2. These compounds exhibited growth-inhibitory activity against Staphyloccus aureus, Salmonella paratyphi A, Shigella dysenteriae 1a, Escherichia coli NL 1401, at the concentration range of 100-500 $\mu$g/ml in general.

• Journal of Applied Biological Chemistry
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• v.48 no.3
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• pp.138-143
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• 2005

Antibacterial, free radical scavenging, proliferative, and cytotoxicity effects of Doenjang extracts were examined. All samples except water extract showed strong antibacterial activity against oral bacteria, Streptococcus. pyogenes, S. mutants, S. sanguinis, S. sorbrinus, S. criceti, S. antinosus, S. gordonii, and Porphyromonas. gingivalis (MIC and MBC values: 0.08-1.25 and 0.16-2.50 mg/ml, respectively). DPPH method showed ethanol and ethyl acetate extracts are effective inhibitors of oral bacteria. Based on MTT assay, 24 h exposure to 0.31 mg/ml of all extracts, excepted water extract, resulted in strong cytotoxicity on KB cells. All extracts strongly inhibited human gingival fibroblast viability.

• Journal of Pharmaceutical Investigation
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• v.28 no.3
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• pp.159-164
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• 1998

The O/W and W/O emulsions containing Scutellariae Radix extract(SRE) which is very slightly soluble in oil phases and sparingly soluble in water phases, were prepared by homogenizing water and oil phases with emulsifier. The diameters of emulsion were ranged from 100 to $300\;{\mu}m$. The viscosity of W/O emulsion was higher than that of O/W emulsion. W/O emulsion was more stable than O/W emulsion which was gradually degraded when tested by centrifuge method and temperature tolerance method at $50^{\circ}C$. The antibacterial activity of two emulsions was not significantly different from that of aqueous solution of SRE, and showed similar MIC and bacterial growth inhibition rate.

• Journal of Environmental Health Sciences
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• v.21 no.1
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• pp.74-77
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• 1995

The insecticidal and antibacterial activity of new synthesized carbamate derivatives(8-Hydroxy-5-chloroquinolyl-N-methylcarbamate(I), 8-Hydroxy-5-chloroquinolyl-N-ethylcarbamate(II)) was examined using 0.2 w/v% acetone solutiolas and 50 r/ml~1000 r/m N,N'-dimethylformamide-$H_2O$(2:3) solutions of each compounds, respectively. 1) Two carbamates exerted insecticidal effects on Sogata furcifera HORVATH, Delphacodes Striatella FAUEN, Whereas no significant effects were observed on the Nilaparvate lugens STAL, Inazuma dorasails MOISCHIULSKY and Nephateffix apicalis Cincticeps UHLER. 2) These compounds exhibited growth-inhibitory activity against Staphylococcus aureus, Salmonella paratyphi A, Shigella dysenteriae 1a, Escherichia coli NL 1401,at the concentration range of 100~500 r/ml in general.

• YAKHAK HOEJI
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• v.8 no.2
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• pp.54-58
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• 1964

Effects on the bacteria gwoth of 96 kinds of crude drugs described in "Pen-Tsao-Kang-Mu" was investigated. Galla Rhois, Moutan Cortex Radicis, Aconiti Tuber, Euphorbiae Radix and PAeoniae Radix showed the antibacterial activity but Cnidii Rhizoma, Coicis Semen, Angelicae gigantis Radix, Asparagi Radix and Liriopes Tuber show the gwoth promoting action of all bacteria used in this experience. It can be seen that 10 kinds of crude drugs classified as poisonous plants inhibited the growth or had no effect by never promoted. 32 kinds of crude drugs as drugs acting on the gastrointestinal system showed antibacterial activity on E. coli $O_{55}$ and E. coli $O_{111}$. 18 kinds on inflammation showed antibacterial activity on Staphylococcus aureus and Sarcina lutea.

• Journal of Microbiology and Biotechnology
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• v.17 no.11
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• pp.1848-1855
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• 2007

Antibacterial activity of essential oils (Tea tree, Chamomile, Eucalyptus) on Staphylococcus aureus growth was evaluated as well as the essential oil-loaded alginate beads. The binding interactions between the cell and the essential oils were measured using an optical biosensor. The antibacterial activity of the essential oils to the cell was evaluated with their binding interaction and affinity. The antibacterial activity appeared in the order of Tea Tree>Chamomile>Eucalyptus, in comparison of the inhibition effects of the cell growth to the essential oils. The association rate constant and affinity of the cell binding on Tea Tree essential oil were $5.0{\times}10^{-13}\;ml/(CFU{\cdot}s)$ and $5.0{\times}10^5\;ml/CFU$, respectively. The affinity of the cell binding on Tea Tree was about twice higher than those on the other essential oils. It might be possible that an effective antibacterial activity of Tea Tree essential oil was derived from its strong adhesive ability to the cell, more so than those of the other essential oils.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.1 no.1
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• pp.43-48
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• 2000

Upon the Preparation of activated carbon fiber(ACF) using chemical activation method and vapour activation method, the fiber obtained from the vapour activation method shows excellent surface Properties. The preparation of antibacterial activated carbon fiber was tried to open the new areas in application of carbon materials. The BET specific surface area and the average pore radius of the antibacterial ACFs were in the range of 844.27~1575.6 $cm^2$/g and 10.6~12.9 (equation omitted), respectively. From the adsorption studies on the antibacterial ACFs, typical Type I isotherms were obtained. And, from the SEM morphology results, it was observed that the surface of ACFs was partially coated by antibacterial materials after the treatment. Finally, from the antibacterial effects of antibacteral ACFs against E. coli, excellent antibacterial activity was shown. Concerning the above results, antibacterial ACFs can have wide application in the areas of sterilization, anti-fragrant. anti-insects.

• Transactions on Electrical and Electronic Materials
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• v.15 no.5
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• pp.275-278
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• 2014

We deposited TiAgN and ZrAgN nanocomposite coatings on pure Titanium specimens, by using arc ion plating (AIP) with single alloy targets. TiAg ZrAg alloy targets of 5 wt.%, 10 wt.% silver content by vacuum arc remelting (VAR), followed by homogenization for 2 hours at $1,100^{\circ}C$ in non-active Ar gas atmosphere and characterized these samples for morphology and chemical composition. We investigated the biocompatibility of TiAg and ZrAg alloys by examining the proliferation of L929 fibroblast cells by MTT test assay, after culturing the cells ($4{\times}10^4cells/cm^2$) for 24 hours; and exploring the antibacterial properties of thin films by culturing Streptococus Mutans (KCTC3065), using paper disk techniques. Our results showed no cytotoxic effects in any of the specimens, but the antibacterial effects against Streptococus Mutans appeared only in the 10 wt.% silver content specimens.

• Journal of the Korean Society of Clothing and Textiles
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• v.34 no.3
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• pp.472-479
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• 2010

The dyeing properties of mulberry fiber/cotton blended fabric with Inonotus obliquus are studied through the investigation of the effects of dyeing conditions, such as the concentration of Inonotus obliquus extract colorants, dyeing temperature, time, and pH values on dye uptakes (K/S). In addition, the effects of mordant on the dye uptakes and antibacterial activities are investigated. The results are summarized as follows. The dye uptakes of dyed fabric increased gradually with an increase concentration of Inonotus obliquus extract colorants, the K/S value was the highest when the dyeing temperature was $60^{\circ}C$ for a duration of 60 minutes. As the pH value of the dyeing solution changed to more acidic, the dyeability of the, fabric was improved. The K/S value recorded the highest at pH 3. The antibacterial activities of dyed and unmordanted mulberry fiber/cotton blended fabric showed a high Staphylococcus aureus reduction rate.

• Korean Journal of Veterinary Research
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• v.55 no.1
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• pp.13-20
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• 2015

This study was performed to investigate the antibacterial, antioxidant, and termite repellent effects of citronella oil (CiO) and lemongrass oil (LO). When the antibacterial activity against Staphylococcus (S.) aureus with various levels of antibacterial resistance were tested, a 0.05% concentration of CiO and LO completely inhibited the growth of all tested S. aureus strains. Evaluation of the antioxidant effect demonstrated that the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity of CiO was 2~3 times greater than that of LO. Among trial products made with various combinations of CiO and LO, a CiO : LO ratio of 6 : 4 had the most potent termite repellent effects. Assessment of acute toxicity of the trial product showed that the $LD_{50}$ was more than 2,000 mg/kg. Based on the above results, CiO and LO have antibacterial, antioxidant, and termite repellent activities. Therefore, both compounds could be potential termites repellent reagents.