Letteratura scientifica selezionata sul tema "Selective fractionation"
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Articoli di riviste sul tema "Selective fractionation":
Frank, Uwe, Jana Dienstbier, Florentin Tischer, Simon E. Wawra, Lukas Gromotka, Johannes Walter, Frauke Liers e Wolfgang Peukert. "Multidimensional Fractionation of Particles". Separations 10, n. 4 (13 aprile 2023): 252. http://dx.doi.org/10.3390/separations10040252.
Martín-Ortiz, Andrea, Francisco Javier Moreno, Ana Isabel Ruiz-Matute e María Luz Sanz. "Selective biotechnological fractionation of goat milk carbohydrates". International Dairy Journal 94 (luglio 2019): 38–45. http://dx.doi.org/10.1016/j.idairyj.2019.02.012.
Furuya, Kenji. "Isotopic fractionation in interstellar molecules". Proceedings of the International Astronomical Union 13, S332 (marzo 2017): 163–74. http://dx.doi.org/10.1017/s1743921317006810.
Ruiz-Aceituno, L., C. Carrero-Carralero, L. Ramos e M. L. Sanz. "Selective fractionation of sugar alcohols using ionic liquids". Separation and Purification Technology 209 (gennaio 2019): 800–805. http://dx.doi.org/10.1016/j.seppur.2018.09.026.
Sun, Kai, Nobuko Suzuki, Zheyu Li, Ryoko Araki, Kosei Ueno, Saulius Juodkazis, Masumi Abe, Sumihare Noji e Hiroaki Misawa. "Electrophoretic chip for fractionation of selective DNA fragment". ELECTROPHORESIS 29, n. 19 (ottobre 2008): 3959–63. http://dx.doi.org/10.1002/elps.200700904.
Ly, Linda, e Valerie C. Wasinger. "Peptide enrichment and protein fractionation using selective electrophoresis". PROTEOMICS 8, n. 20 (22 settembre 2008): 4197–208. http://dx.doi.org/10.1002/pmic.200701088.
Damm, Cornelia, Danny Long, Johannes Walter e Wolfgang Peukert. "Size and Shape Selective Classification of Nanoparticles". Powders 3, n. 2 (17 maggio 2024): 255–79. http://dx.doi.org/10.3390/powders3020016.
Penger, Jörn, Ralf Conrad e Martin Blaser. "Stable Carbon Isotope Fractionation by Methylotrophic Methanogenic Archaea". Applied and Environmental Microbiology 78, n. 21 (17 agosto 2012): 7596–602. http://dx.doi.org/10.1128/aem.01773-12.
Weidener, Dennis, Holger Klose, William Graf von Westarp, Andreas Jupke, Walter Leitner, Pablo Domínguez de María e Philipp M. Grande. "Selective lignin fractionation using CO2-expanded 2-methyltetrahydrofuran (2-MTHF)". Green Chemistry 23, n. 17 (2021): 6330–36. http://dx.doi.org/10.1039/d1gc01651b.
Penín, L., S. Peleteiro, V. Santos, J. L. Alonso e J. C. Parajó. "Selective fractionation and enzymatic hydrolysis of Eucalyptus nitens wood". Cellulose 26, n. 2 (16 novembre 2018): 1125–39. http://dx.doi.org/10.1007/s10570-018-2109-4.
Tesi sul tema "Selective fractionation":
Ly, Linda Biotechnology & Biomolecular Sciences Faculty of Science UNSW. "Development of selective electrophoresis for proteins and peptides within proteomes". Publisher:University of New South Wales. Biotechnology & Biomolecular Sciences, 2008. http://handle.unsw.edu.au/1959.4/42126.
Wagner, Knut. "Development of a comprehensive on-line multidimensional high performance column liquid chromatography system for protein and peptide mapping with integrated size selective sample fractionation". [S.l.] : [s.n.], 2001. http://ArchiMeD.uni-mainz.de/pub/2001/0143/diss.pdf.
Zhang, Rui. "Impact of emerging technologies on the cell disruption and fractionation of microalgal biomass". Thesis, Compiègne, 2020. http://www.theses.fr/2020COMP2548.
This research work focuses on extraction and fractionation of bio-molecules from microalgae using physical treatments: pulsed electric fields (PEF), high voltage electrical discharges (HVED) and ultrasonication (US) techniques. In this study, three microalgae species Nannochloropsis sp., Phaeodactylum tricornutum (P. tricornutum) and Parachlorella kessleri (P. kessleri) were investigated. These species have different cell shapes, structure and intracellular contents. The effects of tested techniques on extraction of bio-molecules have been highlighted in a quantitative and qualitative analysis by evaluating the ionic components, carbohydrates, proteins, pigments and lipids. A comparative study of physical treatments (PEF, HVED and US) at the equivalent energy input for release of intracellular bio-molecules from three microalgal species allowed us to better understand the different disintegration mechanisms. For each microalga at the same energy consumption, the HVED treatment proved to be the most efficient for extraction of carbohydrates, while the US treatment for extraction of proteins and pigments. In general, the smallest efficiency was observed for the PEF treatment. However, the highest selectivity towards carbohydrates can be obtained using the mild PEF or HVED technique. The preliminary physical treatments (PEF, HVED or US) of more concentrated suspensions followed by high pressure homogenization (HPH) of diluted suspensions allowed improving the extraction efficiency and decreasing the total energy consumption. The physical pretreatments permit to reduce the mechanical pressure of the HPH and number of passes, to reach the same extraction yield. For the maximum valorisation of microalgal biomass, extraction procedure assisted by HVED treatment (40 kV/cm, 1-8 ms) followed by aqueous and non-aqueous extraction steps seems to be useful for selective extraction and fractionation of different bio-molecules from microalgae. The significant effects of HVED pre-treatment on organic solvent extraction of pigments (chlorophylls, carotenoids) and lipids were also observed
Rulence, Alexandre. "Mise en œuvre de procédés membranaires pour la séparation sélective de la nisine à partir de surnageants de culture complexes". Electronic Thesis or Diss., Université de Lille (2022-....), 2023. https://pepite-depot.univ-lille.fr/ToutIDP/EDSMRE/2023/2023ULILR034.pdf.
Nisin, a bacteriocin produced by lactic acid bacteria (LAB) presents physicochemical properties such as a thermal resistance and an antimicrobial activity against food pathogens bacteria. Nisin is actually the only bacteriocins labelled as Generally Recognized As Safe (GRAS) by the U.S Food and Drug Administration (FDA) and is thus the only bacteriocin used as a natural preservative in the food industry, making it an interesting alternative to the use of chemical preservatives. However, its uses are hampered at industrial scale due to low yields et high cost linked to its production on commercial broth and its purification necessity the combination of low yields techniques such as salting out coupled with chromatography.In this case we investigated in this work the use of food grade by-product produces by the food industry in replacement of costly commercial broth. Several by-products composed of vegetal and fish peptones were tested for the production of nisin. Whey being the most used by-product employed for production of nisin and several bacteriocin, we tested and compared different vegetal and fish proteins hydrolyzates regarding biomass production and nisin yields obtained. Several vegetal and fish protein hydrolyzates were tested with two different strains of Lactococcus lactis in order to optimize nisin production. Results showed a greater nisin production using L.lactis UL 719 when compared to a commercial strain. Results also showed the efficacy of some vegetal and one fish by-product for the production of nisin when compared to whey medium and commercial broth MRS. During this work was also investigating alternatives for nisin purification. Electro- and pressure-driven membrane process were studied for nisin purification and especially ultrafiltration (UF) and electrodialysis for which no literature reported the use of ED for nisin purification. ED was applied to the purification of nisin from a commercial solution and from a cell-free supernatant produced with whey permeate as broth for fermentation. UF was applied to the purification of nisin from a cell-free supernatant and permit to compare UF and ED in this application. This work enables us to demonstrate nisin interaction with ion exchange membrane never reported and enable its purification with purification factor comparable to conventional method actually used. Moreover, we demonstrated the use of ED not only efficient for nisin purification but with the possibility to implement ED in an eco-circularity concept, from nisin production using by-products, to its purification with ED and the recycling of salts from saline effluent produced during nisin salting-out
Lalari, Vikki Valjeet. "Fractionation of expressed milk for the selective collection of hindmilk by mothers who deliver premature infants". Thesis, 2002. http://hdl.handle.net/2429/13876.
Lee, Tsu-Lin, e 李祖霖. "Studies on Selective Hydroxylation of Aromatics and Stable Carbon Isotope Fractionation by Cytochrome P450 BM3 Variants". Thesis, 2016. http://ndltd.ncl.edu.tw/handle/61422278843352190040.
國立臺灣科技大學
應用科技研究所
104
Cytochrome P450 BM3 is an iron heme protein in Bacillus megaterium;it is capable of binding with oxygen and proceeding oxidation of the natural substrate-fatty acids C12-C20 in length to form hydroxyl group at ω-1, ω-2 or ω-3 position. The corresponding gene of P450BM3 was replicated and inserted in a DNA vector via molecular bioengineering technology. The constructed DNA was transformed and cloned in Escherichia coli host to achieve the protein expression and reveal its function by the catalytic oxidation of hydrocarbons. Crystal structure from Protein Data Bank(PDB:1FAG)allows us to understand the environment around the active site. On the basis of these insights, we can redesign cytochrome P450BM3 to switch its substrates from natural substrate-fatty acids to simple aromatics by directed evolution including site-directed mutagenesis study. According to our rational design, in order to achieve our goal, the amino acid residues 328 or 330 have to be substituted with phenylalanine by site-directed mutagenesis techniques. The variants with single site, double, triple as well as four sites have been deliberated. From the catalysis that using benzene or toluene as substrates, single-site variants (Phe328 or Phe330), double-sites variant(Phe328/Met401), triple-sites variants (3mt, Ile47/Phe51/Phe328 and Phe47/Ser51/Phe328)and four-sites variant 3mt Phe328 are able to show the activities. Phe328 is a major site to present the activities towards benzene and toluene. The distribution of main product was changed to benzyl alcohol when 3mt combined with Phe328 in toluene catalysis. By comparison with other type oxygenase, i.e. non-heme iron monooxygenase, the variants of cytochrome P450BM3 can generate o-cresol but the membrane bound xylene monooxygenase can only achieve sp3 oxidation for benzyl alcohol formation when toluene used as the substrate. From the studies of stable carbon isotope fractionation, the three variants of cytochrome P450BM3 shifted the δ13C(‰) of phenol down to ca. -38 when using benzene (-31) as a substrate. For the catalysis that using toluene (-24) as a substrate, the product δ13C(‰)values of the benzyl alcohol are -24.4~-27.4 and those of o-cresol and p-cresol are at the range of -27.4~-36.5 and -25.7~-29.0, respectively. The derived 12C/13C kinetic isotope effects (1.03~1.09) for benzene oxidation (~1.04) are relatively bigger indicated the transition state of oxygenation related to the bond breakage of C-H bond and bond formation of C-O is mechanistically significant (central transition state). However, most of the 12C/13C kinetic isotope effects obtained for the formation of benzyl alcohol, o-cresol and p-cresol ranged from 1.00~1.03 suggest the processes of both sp2 and sp3 C-H bond breaking as well as C-O bond formation encounter either in a very early or late transition state expect to the case of 3mt A328F variant corresponding to the formation of o-cresol (KIE (12C/13C) ~ 1.07).
Shiau, Kai Jung, e 蕭凱鐘. "A Novel Two–Step Enrichment Procedure for Fractionation and Selective Identification of Multiply and Singly Phosphorylated Peptides". Thesis, 2009. http://ndltd.ncl.edu.tw/handle/24101832783251335952.
國立暨南國際大學
應用化學系
97
Abstract Despite recent technical advances, comprehensive characterization of protein phosphorylation remains a challenge. We explored the possibility using a two–step enrichment procedure for fractionation and selective identification of multiply and singly phosphorylated segments from enzymatic digestion of complex proteins. The procedure involved isolation of multiply phosphorylated peptides from solution using polyarginine-coated nonadiamond and subsequent isolation of singly phosphorylated peptides from the same pool of solution using TiO2-coated magnetic probes. The two types of probes can be independently characterized by MALDI mass spectrometry and provide complementary datasets for phosphoproteomic analysis. In addition, the total number of identified phosphopeptides obtained by the two-step enrichment procedure was almost doubled than that obtained by IMAC, TiO2, or PA affinity-based methods without the use of additional biological material. Improvements to comprehensive phosphopeptide identification via the two-step enrichment procedure are discussed. To our knowledge, this is the first demonstration of the two-step enrichment procedure for selective isolation and fractionation of multiply and singly phosphorylated peptides from the same pool of peptides solution.
Wagner, Knut [Verfasser]. "Development of a comprehensive on-line multidimensional high performance column liquid chromatography system for protein and peptide mapping with integrated size selective sample fractionation / von Knut Wagner". 2001. http://d-nb.info/963262106/34.
Libri sul tema "Selective fractionation":
Walsh, D. M. Challenges to Evolutionary Theory. A cura di Paul Humphreys. Oxford University Press, 2015. http://dx.doi.org/10.1093/oxfordhb/9780199368815.013.14.
Capitoli di libri sul tema "Selective fractionation":
Ruiz-Ruiz, Federico, Jorge Benavides e Marco Rito-Palomares. "Affinity ATPS Strategies for the Selective Fractionation of Biomolecules". In Food Engineering Series, 97–121. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59309-8_6.
Iwarson, S. "The Impact of Donor Selection on Virus Transmission". In Plasma Fractionation and Blood Transfusion, 139–42. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4613-2631-1_17.
Ahire, Vidhula, Niloefar Ahmadi Bidakhvidi, Tom Boterberg, Pankaj Chaudhary, Francois Chevalier, Noami Daems, Wendy Delbart et al. "Radiobiology of Combining Radiotherapy with Other Cancer Treatment Modalities". In Radiobiology Textbook, 311–86. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-18810-7_6.
Patinha, C., A. Reis, E. da Silva e A. Sousa. "Selective sequential extractions for the solid-phase fractionation of arsenic". In Arsenic in the Environment - Proceedings, 360–62. CRC Press, 2014. http://dx.doi.org/10.1201/b16767-135.
Oliveira, Helder de, Diego Vendramini e Jefferson Mortatti. "Geochemical aspects of heavy metal fractionation in eucalyptus soils". In GLOBAL HEALTH TRENDS AND PERSPECTIVES IN HEALTH SCIENCES. Seven Editora, 2023. http://dx.doi.org/10.56238/globalhealthprespesc-033.
Ireland, Adrian, e Darryl Shibata. "In situ genetic analysis with selective ultraviolet radiation fractionation (SURF)". In PCR3, 11–26. Oxford University PressOxford, 1997. http://dx.doi.org/10.1093/oso/9780199636327.003.0002.
Shallice, Tim. "Contrasting domains in the control of action: The routine and the non-routine". In Processes of Change in Brain and Cognitive Development, 3–30. Oxford University PressOxford, 2006. http://dx.doi.org/10.1093/oso/9780198568742.003.0001.
Rickwood, David, Anthea Messent, e Dipak Patel. "Isolation and characterization of nuclei and nuclear subfractions". In Subcellular Fractionation, 71–106. Oxford University PressOxford, 1997. http://dx.doi.org/10.1093/oso/9780199634958.003.0003.
Tallon, Stephen, e Teresa Moreno. "Liquid–Liquid Extraction". In Chemical Processes for a Sustainable Future, 503–51. The Royal Society of Chemistry, 2014. http://dx.doi.org/10.1039/bk9781849739757-00503.
Marriott, Ray. "The Application of Supercritical Carbon Dioxide Extraction of Functional Compounds". In Chemical Processes for a Sustainable Future, 603–27. The Royal Society of Chemistry, 2014. http://dx.doi.org/10.1039/bk9781849739757-00603.
Atti di convegni sul tema "Selective fractionation":
Steindl, Johannes, Rafael Eduardo Hincapie, Ante Borovina, Christoph Puls, Johann Badstöber, Gerhard Heinzmann e Torsten Clemens. "Improved EOR Polymer Selection Using Field-Flow Fractionation". In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207700-ms.
Shintaku, Hirofumi, e Juan G. Santiago. "Extraction and fractionation of RNA and DNA from single cells using selective lysing and isotachophoresis". In SPIE BiOS, a cura di Bonnie L. Gray e Holger Becker. SPIE, 2015. http://dx.doi.org/10.1117/12.2084981.
Rojas, Andrea D., Eva M. Schmelz e Rafael V. Davalos. "Separation Analysis of Breast Cancer Progression Lines Using Contactless Dielectrophoresis". In ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53987.
Konagaya, Rimi, Hiroyuki Tsuboi, Takaaki Itai e Yoshio Takahashi. "Selective isotope fractionation of rubidium during adsorption on phyllosilicate minerals as a tracer of water-rock interaction". In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.12849.
Sakong, B. "Selective in vitro anthelmintic efficacy of Diospyros whyteana (Ebenaceae) active compounds derived using antifungal activity to guide fractionation". In GA 2017 – Book of Abstracts. Georg Thieme Verlag KG, 2017. http://dx.doi.org/10.1055/s-0037-1608296.
Yrjas, Patrik, Bengt-Johan Skrifvars, Mikko Hupa, Juha Roppo, Marko Nylund e Pasi Vainikka. "Chlorine in Deposits During Co-Firing of Biomass, Peat, and Coal in a Full-Scale CFBC Boiler". In 18th International Conference on Fluidized Bed Combustion. ASMEDC, 2005. http://dx.doi.org/10.1115/fbc2005-78097.
Boutière, B., D. Arnoux, J. Sampol, C. Masson, F. Hamon e E. Anglès-Cano. "DETERMINATION OF FREE CIRCULATING t PA AND MAXIMAL t PA CONTENT IN NORMAL HUMAN PLASMA USING A SPECTROPHOTO-METRIC METHOD". In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644427.
Orozco-Duque, A., J. D. Martinez-Vargas, D. Novak, J. Bustamante e G. Castellanos-Dominguez. "Feature selection for discrimination of fractionation levels in atrial electrograms". In 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2014. http://dx.doi.org/10.1109/embc.2014.6943909.
Borovina, Ante, Rafael E. Hincapie Reina, Torsten Clemens, Eugen Hoffmann, Jonas Wegner e Johannes Steindl. "Polymer Selection for Sandstone Reservoirs Using Heterogeneous Micromodels, Field Flow Fractionation and Corefloods". In SPE Improved Oil Recovery Conference. SPE, 2022. http://dx.doi.org/10.2118/209352-ms.
Grinco, Marina, Alexandru Marina, Natalia Birca, Daniel Boscanean, Alic Barba, Vladilena Girbu, Nicon Ungur e Veaceslav Kulcitki. "Pomolic acid from apple pomace: quantitative determination by heteronuclear two-dimentional QNMR and preparative isolation". In Scientific seminar with international participation "New frontiers in natural product chemistry". Institute of Chemistry, Republic of Moldova, 2023. http://dx.doi.org/10.19261/nfnpc.2023.ab14.