dextran hydrodynamic radiusUncategorized

In this work, hydrodynamic properties are investigated in different dextran aqueous solutions with different molecular weights (8.8-2000kDa), in a temperature range from 20C to 50C. The formula is verified for different systems of polymer-solvent and the values are in accord with those obtained by extrapolation. It is a measure of the width of molecular weight distributions (MWD) as well as probability of molecular weight distribution curve (GPC). Chromatographic characterization of polymers: Hyphenated and multidimensional techniques. dextran Calculation of MarkHouwinkSakurada (MHS) equation viscometric constants for chitosan in any solventtemperatura system using experimental reported viscometric constants data. Smith, David R.; Raymonda, John W. (1972). Kasaai, Mohammad R. (2012). For a rigid or rod like polymer molecule that is greatly extended in solution, the Mark-Houwink a constant approaches to a value of 2.0 [48].The hydrodynamic radius (RH), for a sphere ((a/b) = 2.5) is given by the Einstein relation [49]. ; van Nostrum, C.F. Degrees of long-chain branching in dextrans. Carbohydrate Polymers, 68, 477-488. WebDiffusivity of 2000 kDa Dextran was significantly lower for both hydrogel formulations, but was insensitive to collagen concentration, likely due to a larger hydrodynamic diameter (d h ~ 70 nm) on order of the collagen mesh size. Webof overall macromolecular geometry and hydrodynamic draining. For 40 kDa molecules, the hydrodynamic diameter dh ~8 nm is much smaller than the collagen mesh size [ 33, 41 ]. Immediately after formation, the microchannels are filled with interstitial fluid, making them hydrophilic, and a suitable drug delivery system [15]. Eremeeva, T. E.; Bykova, T. O. Unauthorized use of these marks is strictly prohibited. The unfolding of iRFP713 in a crowded milieu - PeerJ 1984;17(6):11703. Increased epidermal laser fluence through simultaneous ultrasonic microporation. Dextrans can function efficiently as anterograde or retrograde tracers, Biophysical Journal, 87, 4259-4270. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. 8600 Rockville Pike Whiteside PJD, Chininis JA, Schellenberg MW, Qian C, Hunt HK. Crini, G. (2005). Proc. HHS Vulnerability Disclosure, Help These results suggest that fibroblasts proliferate and migrate under the SC, and regenerate the skin. Walkenhorst, S.; Olivier, R. (2002). In the future, we plan to investigate the possibility of enhancing the delivery of other macromolecular drugs such as peptides and siRNAs using the RF-based microporation device. The measurements of dextrans molecular weight were determined by size exclusion HPLC (Gilson, France) with Refraction Index detector using a Polysep-GFC-P5000 column (7.8030 mm). The increased TEWL values which were proportional to the number of microspores indicate SC disruption and formation of microchannels in the skin. The calculation of Mark-Houwink parameters is carried out by the graphic representation of the following equation: where kMH (cm3/g) and a are Mark-Houwink constants, depending on the type of polymer, solvent, and temperature of intrinsic viscosity determinations [46]. The human skins were from the back or thigh of a 24-year-old woman. Dependence on Concentration. The intrinsic viscosity calculation requires several concentrations, and because of this inconvenient will not use the Huggins method in this paper. Int J Food Sci Nutr. Ionic Polymers Based on Dextran: Hydrodynamic Properties in Aqueous Solution and Solvent Mixtures. Universal size-independent quantities for the conformational characterization of rigid and flexible macromolecules. The Intrinsic Viscosity of Biological Macromolecules. Micropores are produced by the arrangement of microelectrodes on the skin at precise dimensions, then RF energy generated by alternating currents induces ionic vibrations between electrodes with positive or negative charges. Dynamic light scattering study confirmed the mono-disperse nature of dextran with hydrodynamic radius of 900 nm. 20K. * shows a significant difference between the M.W. Hydrodynamic Properties of Tragacanthin. WebDextran 670 GPC Standard Normative Mw - 670000 Da GPC standards can be used for calibration and molecular weight determination. WebLabeled dextrans are hydrophilic polysaccharides most commonly used in microscopy studies to monitor cell division, track the movement of live cells, and to report the Ultimately they concluded that the temperature increment found to be an effective force in disturbing these interactions, mainly between polymer-polymer and polymer-solvent molecules for the used system. Cite this article. 2023 BioMed Central Ltd unless otherwise stated. Gel permeation chromatography of dextrans in parenteral solutions: Calibration procedure development and method validation. Dextran Vemulapalli V, Bai Y, Kalluri H, Herwadkar A, Kim H, Davis SP, Friden PM, Banga AK. European Biophysical Journal, 36, 85-94. WebThe micelles produced at pH 4.6 have a spherical shape and their size is dependent on the Maillard reaction: reaction time, molar ratio of casein to dextran, and molecular weight of dextran used. These values indicate for dextrans in dilute aqueous solution, both methods give very similar results of the intrinsic viscosity and the respective Mw. If there are particles in the sample, the incident laser light gets scattered in all directions. 1905/05) for their financial support. Nat Biotechnol. WebAmines per 70KDa dextran Theeffectofchargerepulsiononthe hydrodynamicradiuscanbeseenwithRh increaseswithchargedensity.Charge repulsioncausesthehydrodynamicradius toincrease.Withincreasingcharge,the dextranprogressivelyunfolded.Evena lowlevelofaminationcausesthepolymer tounfold. It has been found that, when applied to water treatment, it can effectively act on refractory organic matter in wastewater through thermal decomposition and water molecular action to produce free Actually, everything depends on solvent you want to use and temperature. If you want to know gyration (Rg)or hydrodynamic (Rh) radius, you should The https:// ensures that you are connecting to the Drug deliv. Would you like email updates of new search results? Fusco V, Quero GM, Cho GS, Kabisch J, Meske D, Neve H, Bockelmann W, Franz CM. Amersham Biosciences, AA Edition, www.amershambiosciences.com. Colloid and Polymer Science, 286, 1223-1231. Studies carried out at different ionic strength you can see them in the references [64, 65] and works with different solvents in the references [66, 67]. Google Scholar. However, the results did not show significant regeneration of micropore compared to previous in vivo studies which reported significant regeneration [25]. Hi Khanh, Alan is taking a little time off of Research Gate at the moment, but here is some information in reply to your question. Measurements were made with a Ubbelohde C type suspended level viscometer [57] (IVA, Argentina); with a diameter capillary of 0.81mm and water draining time of 35.89s at 20C, with viscometer constant of 0.027883 mm2/s [58]. In this study, we investigated the effectiveness of RF microporation technology in vitro, by evaluating the permeation of fluorescent-conjugated dextran (FITC-dextran) of various molecular weights through the human and pig skin after microporation, using a transdermal diffusion cell system. RBECs were passaged onto cell culture inserts as described and cultured for a further 714 days in vitro. Table 5 shows the data of Mark-Houwink parameters determined in figure 4 from linear regressions with 2 values higher than 0.9797. Journal of Colloid Science, 31, 308-328. The skin culture medium was purchased from Biopredic International (Saint-Grgoire, France). dextran hydrodynamic radius. Weissella: An Emerging Bacterium with Promising Health Benefits. a-d Haematoxylin/eosin-stained histological sections of human cadaver skin sample and e quantified data using ImageJ for different time periods after microporation. The human and pig skin samples were placed in the receiver chamber of the Transdermal diffusion cell system with the SC facing up and the donor chamber was fixed in place. Hi Alan F Rawle sir, Can you help me in calculating the size of dextran 6 (molecular weight= 6000) and dextran 70 (molecular weight 70000) Huang S, Huang G. Preparation and drug delivery of dextran-drug complex. For a limited temperature range, the viscosity of a polymer solution varies generally following a relation similar to that of usual liquids (rrhenius plot), where the polymer concentration is not very high and that temperature remains far enough from glass transition [38], and for system PEAorganic solvents see reference [63]. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. Chem. Enhanced topical delivery of small hydrophilic or lipophilic active agents and epidermal growth factor by fractional radiofrequency microporation. European Polymer Journal, 36, 2143-2146. Journal of Chemical Education, 80(9), 1036-1038. Synthesis and characterization of blue dextrans. Recent Pat. TdB Labs produce a wide range of FITC-derivatives (490 nm/520 nm) with a mean molecular weight ranging from 4 kDa to 2000 kDa. Elias, Hans-Georg (1975). Chemical penetration enhancers for transdermal drug delivery systems. In this work, the human cadaver skin was treated to confirm the skin regeneration after the application of the microporation device. Dear Sir. Alan F Rawle , Can you help me in calculating the size of dextran 4 (molecular weight= 4000) and dextran 10 (molecular weight 10,000)? Th Palmuti Braga Vettoria, Mary Helen; Martins Franchetti, Sandra Mara; Contiero, Jonas (2012). Soc., 21, 1, 78-86. International Journal of Biological Macromolecules, 42, 133-137. Jeanes, A.; Haynes, W.C.; C. Wilham, A.; Rankin, J.C; Melvin, E.H.; Austin, M. J.; Cluskey, J. E.; Fisher, B.E. Web54 we estimated that the hydrodynamic radii of 3-5 kDa dextran, 20 kDa dextran, and 70 kDa dextran are 2 55 nm, 5 nm, and 6 nm, respectively. WebThomas Gutberlet works at Jlich Centre for Neutron Science (JCNS-2), Forsch and is well known for Lipoteichoic Acid, Neutron Reflectometry and Neutron Reflectivity. Transdermal delivery of FITC-Dextrans with different molecular weights using radiofrequency microporation, https://doi.org/10.1186/s40824-020-00201-7, http://creativecommons.org/licenses/by/4.0/, http://creativecommons.org/publicdomain/zero/1.0/. hydrodynamic Polymers | Free Full-Text | Confinement-Induced Fractionation and The hydrodynamic radius of 2-NBDG glucose was too small to measure. DOI: 10.12691/jpbpc-1-1-3, Received September 18, 2013; Revised October 23, 2013; Accepted November 22, 2013. Kasaai, Mohammad R. (2007). Dextrans in Aqueous Solution. Experimental Review on Intrinsic Peptide and protein transdermal drug delivery. Dextran 670 GPC Standard | Pharmacosmos Dextran Sachdeva V, Banga AK. Gillespie, T.; Hulme, M. A. Webdextran hydrodynamic radius. Drug Deliv. This result could reflect the presence of some aggregated species within the lysozyme sample solution. Keratinocytes adjacent to the wound site induced by the microporation in the epidermis undergo a series of modifications that allow their proliferation and migration to the wound. Figure5 shows the cumulative amount of the FITC-dextran (M.W. In contrast to linear chains, power law behavior is observed only asymptotically at large Mv. Salunkhe SS, Bhatia NM, Pokharkar VB, Thorat JD, Bhatia MS. Topical delivery of idebenone using nanostructured lipid carriers: evaluations of sun-protection and anti-oxidant effects. Nanoparticles in magnetic resonance imaging: from simple to dual hydrodynamic This site needs JavaScript to work properly. dextran (2013). In this work, we evaluate the maximum radius of macromolecules able to enter into HeLa cells following a plasma treatment using a size exclusion approach with dextran molecules. Chen Rong Huei; Wei Yu Chen; Shang Ta Wang; Chu Hsi Hsu; Min Lang Tsai (2009). (2003). Carbohydr Polym. The values of Mark-Houwink parameters universalized for the range of working temperatures are the following: 0.4267 for a*, and 0.1455 cm3/g for k*M-H, with 2 of 0.9399. Kirkland, J. J.; Dilks, C. H.; Rementer, S. W. (1992). A novel correlation for protein diffusion coefficients based on molecular weight on radius of gyration. Treatment of acne scars by fractional bipolar radiofrequency energy. Santoro MM, Gaudino G. Cellular and molecular facets of keratinocyte reepithelization during. Stokes radius If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. These studies were again focused on investigating the hydrodynamic properties of the polymer molecules, their hydrodynamic radius in relation to their radius of gyration and the coherence of the simulation results with polymer theory. Dextran Monolayers and Thin Films of Dextran Hydrophobically Modified. Carbohydrate Polymers, 36, 319-326. Rissmann R, Oudshoorn MHM, Hennink WE, Ponec M, Bouwstra JA. These modifications include degradation of hemidesmosomes attached to the dermis, degradation of desmosomes linked to adjacent cells, contraction of intracellular tonofilament, and lamellipodia formation. Webwhittier union high school district superintendent. of different origins. Macromolecules. Masuelli, Martin Alberto (2013). This phenomenon is observed in the case of hyperbranched biopolymers evidencing an increase of a with temperature. Structural and biocompatibility properties of dextran from Molecular weight (M v) and hydrodynamic properties can be calculated from there. The most widely applied coatings for FDA-approved SPIONs are dextran and carboxydextran. Prausnitz MR, Langer R. Transdermal drug delivery. The Mark-Houwink parameters is calculated molecular weights range from 8.8 to 200kDa. Hydrodynamic cavitation (HC), a common phenomenon that can produce local excessive temperature, high pressure and large amount of energy. 10% neutral buffered formalin was purchased from Hisko (Gunpo, Korea). Comparison of single-point and dilution procedures. Small Intestinal Permeability and Gut-Transit Time Determined Critical parameters for gel permeation Synthesis of dextran by dextransucrase treated, sucrose-supplemented skimmed milk revealed the promising potential of dextran as a food additive. a Immediately after microporation, b 4h, c 8h, and d 24h (n=5, *: p<0.05). European Polymer Journal, 42, 1086-1092. Principles of Size Exclusion Chromatography SEC (GFC High Manufacturing Standards of Molecular Probes Dextrans. The PubMed wordmark and PubMed logo are registered trademarks of the U.S. Department of Health and Human Services (HHS). The solution viscosity () is related to the solvent viscosity (o), resulting in the relative viscosity. Progress in Biophysical Molecules Biological, 68, 207-262. 2005;22(4):5505. ; Ortega, A.; Garcia de la Torre, J.; Harding, S.E. European Polymer Journal, 37, 619-622. Just in case anyone wants to use a different molecular weight to estimate the hydrodynamic size: the calculator is integrated into the classic Zeta Article Hydrodynamic Webprotein hydrodynamic radius was observed with increasing protein concentration (in the range 0.25-2 mM) in both the absence and presence of 8 M urea. Carbohydrate Polymers 95 360-365. The explanation for the anomalous values of a and kM-H is because the mixture solute-solvent is highly compatible due a great compaction of biopolymer, from undisturbed state in the absence of interactions, where free energy of mixing less than zero, and emphasize the nature non-linear or hyperbranched of dextran for Mw high to 200kDa. By studying the molecular weights of various solutions of polymer, Solomon-Ciuta arrived at the formula which allowed the calculation of the intrinsic viscosity of polymer solutions by a single viscosity determination. Advanced Drug Delivery Reviews, 60, 1650-1662. What is hydrodynamic radius The 70-kDa FITC dextran reached the jejunum after 15 min and passed the entire small intestine within 1 h after its administration, demonstrating that 4-kDa FITC dextran hydrodynamic radius Radius Bahary, W. S.; Hogan, M. P.; Jilani, M.; Aronson, M. P. (1995). Dextrans in Aqueous Solution. Kano S, Todo H, Furui K, Kenichi S, Tokudome Y, Hashimoto F, Kojima H, Sugibayashi K. Comparison of several reconstructed cultured human skin models by microscopic observation: their usefulness as an alternative membrane for skin in drug permeation experiments. In our present study, microporated skin permeated insufficient amount of 20K FITC-dextran, suggesting that enhancement of permeability was unsuccessful with macromolecules of more than 20KM.W.. The Dextrans intrinsic viscosity is determined as a function of the molecular weight in water and NaOH 0.5 M see reference [1]. Lee WR, Shen SC, Sun CK, Aljuffali IA, Suen SY, Lin YK, Wang JJ, Fang JY. Radiofrequency with microneedling. Markiertes Dextran wird hufig per Mikroinjektion in die Zellen eingebracht. Human skins (Full-thickness human skin) were supplied by HansBiomed. 2018;1:10915. Biodegradable dextran hydrogels crosslinked by stereocomplex formation for the controlled release of pharmaceutical proteins. However, considering the trauma and unethical practices associated with animal experiments, in vitro studies with human cadaver skin offers an ethical and viable alternative. Solution properties of branched dextran. The fact that the intrinsic viscosity of a given polymer sample is different according to the solvent used gives and insight about the general shape of polymer molecules in solution. Equivalent Radii and Ratios of Radii from Solution Properties as Indicators of Macromolecular Conformation, Shape, and Flexibility. Barshtein, G.; Tamir, I.; Yedgar, S. (1998). Hydrodynamic properties, such as the intrinsic viscosity, [], and equilibrium solution properties such as the hydrodynamic radius RH can be combined to construct dimensionless quantities that are universal since they are of being independent of the macromolecular particle size, while they depend more or less sensitively on its shape [51]. By using this website, you agree to our Macromolecules, 29, 2265-2268. 2017 Dec 12;27(1):73-78. doi: 10.1007/s10068-017-0274-0. Molecular weight, molecular weight distribution and molecular size of a native dextran. Masuelli, Martin Alberto. After 8h, the micropore became more distorted from the previous circle, suggesting that the micropores were closing. 2016;47:15964. A simple way of universalizing the measurements is shown in figure 4 where there is a curve at each temperature for every molecular weight. (more or less, with a hydrodynamic radius of less than 100 nm) to cross from the vasculature into the interstitium. Ghimici, Luminita; Nichifor, Marieta; Wolf, Bernhard (2009). Food Funct. (1990). Immediately after 2, 5, and 10 times microporations, 97.1432.39, 80.5715.51, and 82.3916.49m sizes of micropores were formed on the skin, respectively. Transdermal delivery is of great importance for the effective delivery of bioactive or therapeutic agents into a body. Increased TEWL values are evidence of micropores formation. SWC designed and coordinated the research. DLS tests were conducted at detection angle of 90 (standard) and 173 (backscatter) to measure protein hydrodynamic radius, while protein charge was examined in phase analysis light scattering (PALS) mode at detection angle of 15 (forward). Structural characterization of a new dextran with a low degree of branching produced by Leuconostoc mesenteroides FT045B dextransucrase. Indo AM J Pharm. (1969). (2003). Disclaimer. Ther. Keywords: FITC dextran; intestinal permeability; transit time. Polysaccharide hydrogels for modified release formulations. Bonefish Grill Sweet Potato Mash Recipe, Earth Gummies Bulk, Crawford County Ks Most Wanted, Kettering Crematorium List Of Funerals Tomorrow, Articles D

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