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Probiotical Cell Fragments (PCFs) as “Novel Nutraceutical Ingredients” 被引量:7
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作者 Nditange Shigwedha Liubov Sichel +1 位作者 Li Jia Lanwei Zhang 《Journal of Biosciences and Medicines》 2014年第3期43-55,共13页
Probiotical cell fragments (PCFs) are structural components of the probiotic cell lysate(s) and exhibit similar beneficial effects on the host as live probiotic bacteria. With cell fragment technology (CFT?), the stru... Probiotical cell fragments (PCFs) are structural components of the probiotic cell lysate(s) and exhibit similar beneficial effects on the host as live probiotic bacteria. With cell fragment technology (CFT?), the structural fragments are isolated and purified from live probiotic cells. While observed to be strain-dependent as in the case of live probiotics, orally administered PCFs demonstrated a broad spectrum of immune modulation functions;anti-allergy;anti-inflammation;anti-bacterial and anti-viral properties;anti-mutagenic;and radioprotective and detoxification abilities in humans and animals. The PCFs mechanisms of action include events of motifs of cell wall peptidoglycans, DNA motifs, nucleotide containing components, lipoteichoic acids (LPAs), surface layer (S-layer) proteins, and cytoplasmic proteins. Different immunological in vivo-in vitro tests have shown that PCFs, essentially, have the ability to stimulate the macrophages, and induce cytokines such as interleukins, tumor necrosis factors (TNFs), interferons (IFNs), and natural killer (NK) cells. PCFs may be used as ingredients for foods and beverages or as nutritional supplements with long term stability and shelf-life up to 5 years. PCFs may also be used as health restorative ingredients in cosmetic products. The outcome of probiotics CFT? stands as an advantage to the food and pharmaceutical industries, regarding the formulation of novel products with unadulterated sensory characteristics of origin. Hence, PCFs are being characterized here as “novel nutraceutical ingredients” for health maintenance in both humans and animals. 展开更多
关键词 Probiotical CELL FRAGMENTS (pcfs) Paraprobiotics Immunobiotics IMMUNOMODULATOR NUTRACEUTICAL INGREDIENTS LACTIC Acid Bacteria (LAB)
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孪生孔光子晶体光纤(英文)
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作者 郭淑琴 鲍卫兵 刘恺 《光子学报》 EI CAS CSCD 北大核心 2007年第8期1491-1494,共4页
在光子晶体光纤典型的空气孔三角形排布图案中,将每个空气孔替换为一对孪生空气孔对,孪生空气孔对之间有确定的间距和固定的轴向,并由其形成包层的基本单元.在端面中心位置缺失一孪生空气孔对,由高折射率的背景材料将光场束缚于此形成纤... 在光子晶体光纤典型的空气孔三角形排布图案中,将每个空气孔替换为一对孪生空气孔对,孪生空气孔对之间有确定的间距和固定的轴向,并由其形成包层的基本单元.在端面中心位置缺失一孪生空气孔对,由高折射率的背景材料将光场束缚于此形成纤芯.在包层中所有的孪生空气孔对按照三角形规则均匀排列.在这种新型结构中,由于所有孪生空气孔对都具有相同轴向而使得两个正交方向上的折射率不对称,从而导致双折射效应.本文利用有限差分法进行数值计算,所设计孪生空气孔对光子晶体光纤在两个正交方向上的折射率差Δneff可达到10-4.孪生空气孔对结构参量可在一定程度上影响双折射效果,增大空气孔或减小孪生空气孔对内部间距都可在一定程度上增大双折射效应. 展开更多
关键词 光子晶体光纤(pcfs) 孪生空气孔对 双折射 有效折射率 有限差分法(FDM) 单模光纤
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Design of supercontinuum generating photonic crystal fiber at 1.06, 1.31 and 1.55 µm wavelengths for medical imaging and optical transmission systems 被引量:1
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作者 Feroza Begum Yoshinori Namihira 《Natural Science》 2011年第5期401-407,共7页
We propose broad supercontinuum spectrum generating highly nonlinear photonic crystal fiber (HN-PCF) which can be used in ultrahigh- resolution optical coherence tomography and optical transmission systems. Using full... We propose broad supercontinuum spectrum generating highly nonlinear photonic crystal fiber (HN-PCF) which can be used in ultrahigh- resolution optical coherence tomography and optical transmission systems. Using full vector finite difference method, we investigated the different properties of HN-PCF. Broadband su-percontinuum spectrum is numerically calculated by using nonlinear Schr?dinger equation. Investigation showed that it is possible to obtain longitudinal resolution in a biological tissue of 1.3 μm, 1.2 μm and 1.1 μm by using picosecond continuum light at center wavelengths of 1.06 μm, 1.31 μm and 1.55 μm, respectively. 展开更多
关键词 Photonic Crystal Fibers (pcfs) Finite Difference Method CHROMATIC Dispersion SUPERCONTINUUM Spectrum Optical COHERENCE Tomography
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