• Journal of Microbiology and Biotechnology
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• 제25권9호
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• pp.1510-1518
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• 2015

In this work, we wanted to develop a probiotic from famous longevity villages in Korea. We visited eight longevity villages in Korea to collect fecal samples from healthy adults who were aged above 80 years and had regular bowel movements, and isolated lactic-acid-producing bacteria from the samples. Isolated colonies that appeared on MRS agar containing bromophenol blue were identified by means of 16S rRNA sequencing, and 102 of the isolates were identified as lactic-acid-producing bacteria (18 species). Lactobacillus fermentum was the most frequently found species. Eight isolates were selected on the basis of their ability to inhibit the growth of six intestinal pathogens (Escherichia coli O157:H7, Salmonella enterica subsp. enterica Typhimurium, Salmonella enterica subsp. enterica Enteritidis, Enterococcus faecalis, Staphylococcus aureus, and Listeria monocytogenes) and their susceptibility to 15 antimicrobial agents. Among these eight isolates, four Lactobacillus fermentum isolates were found not to produce any harmful enzymes or metabolites. Among them, Lactobacillus fermentum isolate no. 24 showed the strongest binding to intestinal epithelial cells, the highest immune-enhancing activity, anti-inflammation activity, and anti-oxidation activity as well as the highest survival rates in the presence of artificial gastric juice and bile solution. This isolate, designated Lactobacillus fermentum PL9988, has all the characteristics for a good probiotic.

• 약학회지
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• 제49권4호
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• pp.275-283
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• 2005

The purpose of the present study was to kinetically investigate the carrier-mediated uptake in the hepatic transport of organic anions, and to simulate the 'in vivo counter-transport' phenomena, using kinetic model which was developed in this study. The condition that the mobility of carrier-ligand complex is greater than that of free carrier is not essential for the occurrence of 'counter-transport' phenomenon. To examine the inhibitory effects on the initial uptake of organic anions by the liver, it is necessary to judge whether the true counter-transport mechanism (trans-stimulation) is working or not. Effects of bromophenol blue (BPB) or bromosulfophthalein (BSP) on the plasma disappearance curves of a 1-anilino-8-naphthalene sulfonate (ANS) were then kinetically analyzed based on a flow model, in which the ligand is eliminated only from the peripheral compartment (liver compartment). Moreover, 'in vivo counter-transport' phenomena were simulated based on the perfusion model which incorporated the carrier-mediated transport and the saturable intracellular binding. The 'in vivo counter-transport' phenomena in the hepatic transport of a organic anions were well demonstrated by incorporating the carrier-mediated process. However, the 'in vivo counter-transport' phenomena may be also explained by the enhancement of back diffusion due to the displacement of intracellular binding. In conclusion, one should be more cautious in interpreting data obtained from so-called 'in vivo counter-transport' experiments.

• Advances in Traditional Medicine
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• 제7권3호
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• pp.211-216
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• 2007

Swollen and painful extremities have been treated with herbal baths in attempts to alleviate the symptoms. A popular herbal bath used in China, contains a component called 'bone-penetrating herb' which is believed to facilitate the penetration of herbal substances across the skin to the swollen site, so swollen site, so that pain and swelling will be improved. A search from the Chinese pharmacopedia revealed that 22 different herbs have been traditionally used as 'bone-penetrating herb'. Five of these herbs were available in market and were chosen for experimental studies. Standard diffusion experiments were done to identify the most effective herb among the five, in the penetration facilitation. Glechoma longituba at a concentration of 20% was found to give the best results in the facilitation of Bromophenol blue diffusion across artificial and biological membranes. When compared with one commonly used diffusion facilitator, viz. azone, azone was found to be more effective than glechoma longituba. The encouraging observations support future studies on the basic science behind the use of herbal components as topical agents to treat pain and swelling.

• 한국환경농학회지
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• 제25권3호
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• pp.211-216
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• 2006

Coriolus hirsutus LD-1 균주의 리그닌분해효소 활성과 몇몇 염료의 탈색능을 조사하였다. 백색부후균인 LD-1 균주는 laccase(16,388.9 U/L)와 manganese- dependent peroxidase (19.81 U/L)는 생산하였으나 lignin peroxidase를 생산하지 않았다. 균주를 염료와 함께 8일간 배양했을때 염료 RBBR과 염료 BB의 탈색율은 각각 70.2%와 98%로 나타났다. Manganese-dependent peroxidase는 8일간 배양 중 효소 활성은 매우 낮은 반면 laccase는 지속적으로 생산되어 대단히 높은 활성을 나타내었다. 백색부후균인 Coriolus hirsutus LD-1에 의한 염료의 탈색은 주로 laccase에 의한 것으로 사료되었다.

• Toxicological Research
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• 제33권4호
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• pp.325-332
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• 2017

3-Bromo-4,5-dihydroxybenzaldehyde (BDB) is a natural bromophenol compound that is most commonly isolated from red algae. The present study was designed to investigate the anti-inflammatory properties of BDB on atopic dermatitis (AD) in mice induced by 2,4-dinitrochlorobenzene (DNCB) and on lipopolysaccharide (LPS)-stimulated murine macrophages. BDB treatment (100 mg/kg) resulted in suppression of the development of AD symptoms compared with the control treatment (induction-only), as demonstrated by reduced immunoglobulin E levels in serum, smaller lymph nodes with reduced thickness and length, a decrease in ear edema, and reduced levels of inflammatory cell infiltration in the ears. In RAW 264.7 murine macrophages, BDB (12.5, 25, 50, and $100{\mu}M$) suppressed the production of interleukin-6, a proinflammatory cytokine, in a dose-dependent manner. BDB also had an inhibitory effect on the phosphorylation of nuclear factor kappa-light-chain-enhancer of activated B cells (NF-${\kappa}B$) and signal transducer and activator of transcription 1 (STAT1; Tyr 701), two major signaling molecules involved in cellular inflammation. Taken together, the results show that BDB treatment alleviates inflammatory responses in an atopic dermatitis mouse model and RAW 264.7 macrophages. These results suggest that BDB may be a useful therapeutic strategy for treating conditions involving allergic inflammation such as atopic dermatitis.

• Advances in nano research
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• 제15권4호
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• pp.295-304
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• 2023

In this paper, a powerful photocatalyst based on carbon nanocomposite is developed in order to obtain a new material applicable in water treatment and especially for the discoloration of effluents used in the textile industry. For that, TiO₂-graphene nanocomposites have been successfully synthesized by a mixture of Functionalized Graphene Sheet (FGS) and tetrachlorotitanium complexes to form FGS-TiO₂ nanocomposite. In the presence of an anionic surfactant, we used a new chemical process to functionalize graphene sheets in order to make them an excellent medium for blocking and preventing the aggregation of TiO₂ nanoparticles. The components of these nanocomposites are characterized by means of X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM), which confirms the successful formation of the FGS-TiO₂ nanocomposite. It was found that the TiO₂ nanoparticles were dispersed uniformly on the graphene plane which possesses better charge separation capability than pure TiO₂. The FGS-TiO₂ nanocomposites exhibited higher photocatalytic activity compared to pure TiO₂ for the removal of three dyes: such as Methylene Blue (MB), Bromophenol Blue (BB) and Alizarin Red-S (AR) in water. The removal process was fast and more efficient with FGS-TiO₂ nanocomposite in daylight (in the absence of UV irradiation) compared to pure TiO₂ nanoparticles without and under UV in all pH range.

• 대한화학회지
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• 제18권5호
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• pp.381-388
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• 1974

p-Phenylenediamine(PPD) 및 m-aminophenol(MAP)를 몰비를 달리하면서, -5∼0$^{\circ}$, $N_2$ 기류중에서 일정량의 포르말린(이때 포름알데히드의 량은 PPD와 MAP 전량에 대하여 2배몰에 해당하는 량으로 고정)과 반응시키면 약간의 발열과 함께 급격히 부가축합이 진행되어 난용성인 갈색 내지 등색의 중합체를 생성한다. PPD:MAP의 몰비가 1:3, 1:2, 1:1의 것들을 180∼220에서 몰비가 2:1, 3:1의 것들을 250∼270$^{\circ}$에서 각각 암색으로 색변화를 이르킬 따름이며, 이 중합체들은 모두 300$^{\circ}$까지 용융하지 않는다. 이들 중합체의 메틸렌블루에 대한 흡착력은 N2 기류중에서 중합시킨것을 묽은(7%) 수산화나트륨으로 처리하였을때 현저히 흡착력이 증가되어 PPD-MAP-F(F;포름알데히드)의 몰비가 1:3:8 일때 수지 1g당 80mg의 메틸렌블루를 흡착하며, 브롬페놀블루에대한 흡착력은 PPD-MAP-F의 몰비가 2:1:6일때가 최고이며, 수지 1g당 250mg의 브롬페놀블루를 흡착한다. TGA에 의한 내열성실험에서는 PPD-MAP-F의 몰비가 1:3:8인 경우 가장 좋은 결과를 나타냈으며, $N_2$ 기류중 매분 2$^{\circ}$로 가열하였을때 900$^{\circ}$에서 45%의 중량손실을 나타내었다.