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1.
Gra?yna A. P?aza Joanna Chojniak Ibrahim M. Banat 《International journal of molecular sciences》2014,15(8):13720-13737
Developing a reliable experimental protocol for the synthesis of nanomaterials is one of the challenging topics in current nanotechnology particularly in the context of the recent drive to promote green technologies in their synthesis. The increasing need to develop clean, nontoxic and environmentally safe production processes for nanoparticles to reduce environmental impact, minimize waste and increase energy efficiency has become essential in this field. Consequently, recent studies on the use of microorganisms in the synthesis of selected nanoparticles are gaining increased interest as they represent an exciting area of research with considerable development potential. Microorganisms are known to be capable of synthesizing inorganic molecules that are deposited either intra- or extracellularly. This review presents a brief overview of current research on the use of biosurfactants in the biosynthesis of selected metallic nanoparticles and their potential importance. 相似文献
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Environmental applications of biosurfactants: recent advances 总被引:4,自引:0,他引:4
Pacwa-Płociniczak M Płaza GA Piotrowska-Seget Z Cameotra SS 《International journal of molecular sciences》2011,12(1):633-654
Increasing public awareness of environmental pollution influences the search and development of technologies that help in clean up of organic and inorganic contaminants such as hydrocarbons and metals. An alternative and eco-friendly method of remediation technology of environments contaminated with these pollutants is the use of biosurfactants and biosurfactant-producing microorganisms. The diversity of biosurfactants makes them an attractive group of compounds for potential use in a wide variety of industrial and biotechnological applications. The purpose of this review is to provide a comprehensive overview of advances in the applications of biosurfactants and biosurfactant-producing microorganisms in hydrocarbon and metal remediation technologies. 相似文献
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Karl Scheibenbogen Richard G. Zytner Hung Lee Jack T. Trevors 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1994,59(1):53-59
The ability of rhamnolipid biosurfactants produced by Pseudomonas aeruginosa UG2 to wash a model hydrocarbon mixture from unsaturated soil columns was studied. Both aliphatic and aromatic hydrocarbons were effectively removed without soil clogging with non-recirculating biosurfactant solutions. Recirculation of wash solutions did not substantially affect washing efficiency. Of the several chemical surfactants tested, only Triton X-100 provided comparable hydrocarbon washing efficiency without soil clogging. The results suggest that UG2 biosurfactants have the potential for remediation of hydrophobic pollutants in unsaturated soil. 相似文献
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Noelia Rodríguez Ana Torrado Sandra Cortés José Manuel Domínguez 《Journal of the science of food and agriculture》2010,90(10):1726-1734
BACKGROUND: Lactococcus lactis is an interesting microorganism with several industrial applications, particularly in the food industry. As well as being a probiotic species, L. lactis produces several metabolites with interesting properties, such as lactic acid (LA) and biosurfactants. Nevertheless, L. lactis is an especially demanding species since it has strong nutritional requirements, implying the use of complex and expensive culture media. RESULTS: The results showed the potential of L. lactis CECT‐4434 as a LA and biosurfactant producer. The economical cost of L. lactis cultures can be reduced by replacing the MRS medium by the use of two waste materials: trimming vine shoots as C source, and 20 g L?1 distilled wine lees (vinasses) as N, P and micronutrient sources. From the hemicellulosic fraction, 14.3 g L?1 LA and 1.7 mg L?1 surfactin equivalent were achieved after 74 h (surface tension reduction of 14.4 mN m?1); meanwhile, a simultaneous saccharification and fermentation process allowed the generation of 10.8 g L?1 LA and 1.5 mg L?1 surfactin equivalent after 72 h, reducing the surface tension by 12.1 units at the end of fermentation. CONCLUSIONS: Trimming vine shoots and vinasses can be used as alternative economical media for LA and cell‐bound biosurfactant production. Copyright © 2010 Society of Chemical Industry 相似文献
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Revalorisation of vine trimming wastes using Lactobacillus acidophilus and Debaryomyces hansenii 总被引:1,自引:0,他引:1
Oscar M Portilla Beatriz Rivas Ana Torrado Ana B Moldes José M Domínguez 《Journal of the science of food and agriculture》2008,88(13):2298-2308
BACKGROUND: Mild acid treatments of vine‐shoot trimmings result in the hydrolysis of hemicellulosic sugars that can be utilised by Lactobacillus acidophilus CECT‐4179 (ATCC 832) and Debaryomyces hansenii NRRL Y‐7426 as carbon sources to obtain food additives. Since the high content of glucose in these hydrolysates reduces the effective bioconversion of xylose into xylitol by D. hansenii, the use of Lactobacillus acidophilus, one of the main probiotic species, allows this problem to be solved by the selective consumption of glucose. In order to use both sugars (glucose and xylose), hemicellulosic vine‐shoot trimming hydrolysates can be sequentially fermented by both micro‐organisms. RESULTS: It was found that, in the first step, L. acidophilus generated almost exclusively lactic acid (32.7 g of lactic acid L?1, QLA = 1.363 g L?1 h?1, YLA/S = 0.72 g g?1) by homofermentative degradation of sugars (mainly glucose), and in the second step, the remaining hemicellulosic sugars were transformed primarily into xylitol by Debaryomyces hansenii (31.3 g of xylitol L?1, QXylitol = 0.708 g L?1 h?1, YXylitol/S = 0.66 g g?1). Furthermore, L. acidophilus proved to be a strong cell‐bounded biosurfactant producer. Cell extracts were able to reduce the surface tension (ST) of PBS in 18 mN m?1 units. Lactobacillus acidophilus cells showed no difference in viability before or after PBS extraction of biosurfactants, achieving values of 0.9 × 109 colony‐forming units (CFU) mL?1 in both cases. CONCLUSIONS: These results have made a serious contribution to the re‐evaluation of a useless and pollutant residue, producing a wide range of natural food additives. Copyright © 2008 Society of Chemical Industry 相似文献
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生物表面活性剂及其在食品工业中的应用 总被引:8,自引:0,他引:8
生物表面活性剂是一类由微生物产生的应用潜力巨大的新型的表面活性剂,具有降低表面张力的作用,对环境无毒害,且生物降解性能好,其应用研究将有广阔的发展前景。 相似文献
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