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Marine Polymer-Gels' Relevance in the Atmosphere as Aerosols and CCN. Gels 2021; 7:gels7040185. [PMID: 34842644 PMCID: PMC8628772 DOI: 10.3390/gels7040185] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/21/2021] [Accepted: 10/23/2021] [Indexed: 11/23/2022] Open
Abstract
Marine polymer gels play a critical role in regulating ocean basin scale biogeochemical dynamics. This brief review introduces the crucial role of marine gels as a source of aerosol particles and cloud condensation nuclei (CCN) in cloud formation processes, emphasizing Arctic marine microgels. We review the gel’s composition and relation to aerosols, their emergent properties, and physico-chemical processes that explain their change in size spectra, specifically in relation to aerosols and CCN. Understanding organic aerosols and CCN in this context provides clear benefits to quantifying the role of marine nanogel/microgel in microphysical processes leading to cloud formation. This review emphasizes the DOC-marine gel/aerosolized gel-cloud link, critical to developing accurate climate models.
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Puluhulawa LE, Joni IM, Mohammed AFA, Arima H, Wathoni N. The Use of Megamolecular Polysaccharide Sacran in Food and Biomedical Applications. Molecules 2021; 26:molecules26113362. [PMID: 34199586 PMCID: PMC8199723 DOI: 10.3390/molecules26113362] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 05/28/2021] [Accepted: 05/31/2021] [Indexed: 11/16/2022] Open
Abstract
Natural polymer is a frequently used polymer in various food applications and pharmaceutical formulations due to its benefits and its biocompatibility compared to synthetic polymers. One of the natural polymer groups (i.e., polysaccharide) does not only function as an additive in pharmaceutical preparations, but also as an active ingredient with pharmacological effects. In addition, several natural polymers offer potential distinct applications in gene delivery and genetic engineering. However, some of these polymers have drawbacks, such as their lack of water retention and elasticity. Sacran, one of the high-molecular-weight natural polysaccharides (megamolecular polysaccharides) derived from Aphanothece sacrum (A. sacrum), has good water retention and elasticity. Historically, sacran has been used as a dietary food. Moreover, sacran can be applied in biomedical fields as an active material, excipient, and genetic engineering material. This article discusses the characteristics, extraction, isolation procedures, and the use of sacran in food and biomedical applications.
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Affiliation(s)
- Lisa Efriani Puluhulawa
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Universitas Padjajaran, Sumedang 45363, Indonesia;
| | - I Made Joni
- Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjajaran, Sumedang 45363, Indonesia;
- Functional Nano Powder University Center of Excellence (FiNder U CoE) Padjadajaran Universitas Padjajaran, Sumedang 45363, Indonesia
| | | | | | - Nasrul Wathoni
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Universitas Padjajaran, Sumedang 45363, Indonesia;
- Correspondence: ; Tel.: +62-22-842-888888
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Fe(III)-polyuronic acid photochemistry: radical chemistry in natural polysaccharide. Photochem Photobiol Sci 2021; 20:255-263. [DOI: 10.1007/s43630-021-00014-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 01/19/2021] [Indexed: 12/20/2022]
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5
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Salama HE, Abdel Aziz MS. Novel biocompatible and antimicrobial supramolecular O-carboxymethyl chitosan biguanidine/zinc physical hydrogels. Int J Biol Macromol 2020; 163:649-656. [DOI: 10.1016/j.ijbiomac.2020.07.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/25/2020] [Accepted: 07/03/2020] [Indexed: 12/14/2022]
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Preparation of Succinoglycan Hydrogel Coordinated With Fe 3+ Ions for Controlled Drug Delivery. Polymers (Basel) 2020; 12:polym12040977. [PMID: 32331339 PMCID: PMC7240483 DOI: 10.3390/polym12040977] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/20/2020] [Accepted: 04/21/2020] [Indexed: 01/06/2023] Open
Abstract
Hydrogel materials with a gel-sol conversion due to external environmental changes have potential applications in a wide range of fields, including controlled drug delivery. Succinoglycans are anionic extracellular polysaccharides produced by various bacteria, including Sinorhizobium species, which have diverse applications. In this study, the rheological analysis confirmed that succinoglycan produced by Sinorhizobium meliloti Rm 1021 binds weakly to various metal ions, including Fe2+ cations, to maintain a sol form, and binds strongly to Fe3+ cations to maintain a gel form. The Fe3+-coordinated succinoglycan (Fe3+-SG) hydrogel was analyzed by attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, circular dichroism (CD), and field-emission scanning electron microscopy (FE-SEM). Our results revealed that the Fe3+ cations that coordinated with succinoglycan were converted to Fe2+ by a reducing agent and visible light, promoting a gel-sol conversion. The Fe3+-SG hydrogel was then successfully used for controlled drug delivery based on gel-sol conversion in the presence of reducing agents and visible light. As succinoglycan is nontoxic, it is a potential material for controlled drug delivery.
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Rheopectic Behavior for Aqueous Solutions of Megamolecular Polysaccharide Sacran. Biomolecules 2020; 10:biom10010155. [PMID: 31963576 PMCID: PMC7023324 DOI: 10.3390/biom10010155] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 01/15/2020] [Accepted: 01/15/2020] [Indexed: 01/10/2023] Open
Abstract
The rheopectic behavior of sacran aqueous solutions, a natural giant molecular polysaccharide with a molecular weight of 1.6 × 107 g/mol, was investigated. When a low shear was applied to 1.0 wt.% sacran solution, the shear viscosity increased from 7.2 to 34 Pa·s. The increment in the viscosity was enhanced as the shear rate decreased. The shear viscosity was independent of the time at a shear rate of 0.8 s−1; simultaneously, thixotropic behavior was observed at shear rates higher than 1.0 s−1. A crossover was observed at 0.15 wt.% for the concentration dependence of both the viscosity increase and zeta potential, which was the vicinity of the helix transition concentration or gelation concentration. It was clear that the molecular mechanism for the rheopexy was different at lower and higher regions of the crossover concentration.
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Okajima M, Kaneko T. Industrial and Medical Material Applications of a Mega-polysaccharide Derived from Cyanobacteria. YAKUGAKU ZASSHI 2019; 139:363-369. [DOI: 10.1248/yakushi.18-00177-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Maiko Okajima
- Energy and Environmental Area, Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology
| | - Tatsuo Kaneko
- Energy and Environmental Area, Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology
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Sornkamnerd S, Okajima MK, Matsumura K, Kaneko T. Surface-Selective Control of Cell Orientation on Cyanobacterial Liquid Crystalline Gels. ACS OMEGA 2018; 3:6554-6559. [PMID: 30023952 PMCID: PMC6045405 DOI: 10.1021/acsomega.7b02027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 02/27/2018] [Indexed: 05/21/2023]
Abstract
Liquid crystalline hydrogels (LCGs) with layer structures and oriented pores were created using sacran which is a cyanobacterial heteropolysaccharide possessing functional sulfate, carboxylate, and amide groups in common with glycosaminoglycan. The LCG biocompatibility with L929 mouse fibroblasts was confirmed under the appropriate conditions. Enhanced growth and proliferation of L929 cells without exhibiting any toxicity were confirmed. The water contact angle and protein adsorption ability on the LCG were well-controlled by the cross-linking degree. Additionally, fibroblasts were finely oriented on the LCG side face where layer edges made a striped morphology on its surface, whereas the flat top faces of the LCG did not induce any specific cell orientation.
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Affiliation(s)
- Saranyoo Sornkamnerd
- Graduate School
of Advanced Science
and Technology, Japan Advanced Institute
of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Maiko K. Okajima
- Graduate School
of Advanced Science
and Technology, Japan Advanced Institute
of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Kazuaki Matsumura
- Graduate School
of Advanced Science
and Technology, Japan Advanced Institute
of Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Tatsuo Kaneko
- E-mail: . Phone: +81-761-51-1631. Fax: +81-761-51-1635 (T.K.)
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Kaneko T, Okajima MK. [Super Liquid Crystalline Polysaccharides Produced by Ultimately-ecological Microreactors]. YAKUGAKU ZASSHI 2018; 138:489-496. [PMID: 29607994 DOI: 10.1248/yakushi.17-00201-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cyanobacteria fix carbon dioxide and nitrogen from the atmosphere using solar energy to produce various biomolecules, and thus are regarded as ultimately ecological microreactors. Sacran is a cyanobacterial polysaccharide with a very high molecular weight of 29 Mg/mol, which is extracted from Aphanothece sacrum cyanobacterium mass-cultivated in freshwater environments such as river or spring. Sacran is a water-soluble heteropolysaccharide comprising more than 6 kinds of sugar residues and contains 12% sulfate anionic groups and 27% carboxyls. Sacran has a super-absorbent function of water, which can retain 6000 mL for 1 g specimen, due to very long hydrating chains. The value is much higher than hyaluronic acid or conventional super-absorbent polymers. Sacran exhibits self-orienting behavior in dilute solution at a concentration range over 0.25 wt%, which is quite low when compared with conventional liquid crystalline polysaccharides. Mesogenic helical chains of sacrans have extremely high aspect ratios of 1600 for highly persistent lengths of 32 micrometer. Through the liquid crystallinity, sacran solution shows a shear-thinning behavior and the solution spread over a substrate such as biological skin very efficiently to create a thin layer. Applied on atopic dermatitis skin sacran solution exerts excellent moisturizing effect and anti-itching action.
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Affiliation(s)
- Tatsuo Kaneko
- Energy and Environmental Area, Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology
| | - Maiko K Okajima
- Energy and Environmental Area, Graduate School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology
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Sornkamnerd S, Okajima MK, Kaneko T. Tough and Porous Hydrogels Prepared by Simple Lyophilization of LC Gels. ACS OMEGA 2017; 2:5304-5314. [PMID: 31457799 PMCID: PMC6641907 DOI: 10.1021/acsomega.7b00602] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 07/21/2017] [Indexed: 05/30/2023]
Abstract
Porous hydrogels possessing mechanical toughness were prepared from sacran, a supergiant liquid crystalline (LC) polysaccharide produced from Aphanothece sacrum. First, layered hydrogels were prepared by thermal cross-linking of film cast over a sacran LC solution. Then, anisotropic pores were constructed using a freeze-drying technique on the water-swollen layered hydrogels. Scanning electron microscopic observation revealed that pores were observable only on the side faces of sponge materials parallel to the layered structure but never on the top or bottom faces. The pore size, porosity, and swelling behavior were controlled by the thermal-cross-linking temperature. To clarify the freezing effect, a freeze-thawing method was used for comparison. The freeze-thawed hydrogels also formed layers but no pores. The mechanical properties and network structures of hydrogels were also studied, clarifying that porous hydrogels, even those with a high quantity of pores, were tough owing to the pores orienting along the layer direction like tunnels.
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Affiliation(s)
- Saranyoo Sornkamnerd
- Energy and Environment Area,
School of Materials Science, Graduate School of Advanced Science and
Technology, Japan Advanced Institute of
Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Maiko K. Okajima
- Energy and Environment Area,
School of Materials Science, Graduate School of Advanced Science and
Technology, Japan Advanced Institute of
Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Tatsuo Kaneko
- Energy and Environment Area,
School of Materials Science, Graduate School of Advanced Science and
Technology, Japan Advanced Institute of
Science and Technology (JAIST), 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
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12
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Ohyama A, Higashi T, Motoyama K, Arima H. Ternary complexes of folate-PEG-appended dendrimer (G4)/α-cyclodextrin conjugate, siRNA and low-molecular-weight polysaccharide sacran as a novel tumor-selective siRNA delivery system. Int J Biol Macromol 2017; 99:21-28. [PMID: 28223132 DOI: 10.1016/j.ijbiomac.2017.02.045] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 01/25/2017] [Accepted: 02/09/2017] [Indexed: 12/23/2022]
Abstract
We previously developed a tumor-selective siRNA carrier by preparing polyamidoamine dendrimer (generation 4, G4) conjugates with α-cyclodextrin and folate-polyethylene glycol (Fol-PαC (G4)). In the present study, we developed ternary complexes of Fol-PαC (G4)/siRNA with low-molecular-weight-sacrans to achieve more effective siRNA transfer activity. Among the different molecular-weight sacrans, i.e. sacran 100, 1000 and 10,000 (MW 44,889Da, 943,692Da and 1,488,281Da, respectively), sacran 100 significantly increased the cellular uptake and the RNAi effects of Fol-PαC (G4)/siRNA binary complex with negligible cytotoxicity in KB cells (folate receptor-α positive cells). In addition, the ζ-potential and particle size of Fol-PαC (G4)/siRNA complex were decreased by the ternary complexation with sacran 100. Importantly, the in vivo RNAi effect of the ternary complex after the intravenous administration to tumor-bearing BALB/c mice was significantly higher than that of the binary complex. In conclusion, Fol-PαC (G4)/siRNA/sacran 100 ternary complex has a potential as a novel tumor-selective siRNA delivery system.
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Affiliation(s)
- Ayumu Ohyama
- Department of Physical Pharmaceutics, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto 862-0973, Japan; Program for Leading Graduate Schools 'Health Life Science: Interdisciplinary and Glocal Oriented (HIGO) Program', Kumamoto University, Japan
| | - Taishi Higashi
- Department of Physical Pharmaceutics, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto 862-0973, Japan
| | - Keiichi Motoyama
- Department of Physical Pharmaceutics, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto 862-0973, Japan
| | - Hidetoshi Arima
- Department of Physical Pharmaceutics, Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Chuo-ku, Kumamoto 862-0973, Japan; Program for Leading Graduate Schools 'Health Life Science: Interdisciplinary and Glocal Oriented (HIGO) Program', Kumamoto University, Japan.
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Zhao Y, Thu Hien KT, Mizutani G, Rutt HN, Amornwachirabodee K, Okajima M, Kaneko T. Optical second-harmonic images of sacran megamolecule aggregates. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. A, OPTICS, IMAGE SCIENCE, AND VISION 2017; 34:146-152. [PMID: 28157840 DOI: 10.1364/josaa.34.000146] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We have detected a second-order nonlinear optical response from aggregates of the ampholytic megamolecular polysaccharide sacran extracted from cyanobacterial biomaterials by using optical second-harmonic-generation (SHG) microscopy. The SHG images of sacran cotton-like lump, fibers, and cast films showed SHG intensity microspots of several tens of micrometers in size. The dependence of the SHG spot intensity on an excitation light polarization angle was observed to illustrate sacran molecular orientation in these microdomains. We also observed SHG signals around a special region of the cast film edges of sacran. These results show that sacran megamolecules aggregate in several different ways.
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Giammanco GE, Carrion B, Coleman RM, Ostrowski AD. Photoresponsive Polysaccharide-Based Hydrogels with Tunable Mechanical Properties for Cartilage Tissue Engineering. ACS APPLIED MATERIALS & INTERFACES 2016; 8:14423-14429. [PMID: 27223251 DOI: 10.1021/acsami.6b03834] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Photoresponsive hydrogels were obtained by coordination of alginate-acrylamide hybrid gels (AlgAam) with ferric ions. The photochemistry of Fe(III)-alginate was used to tune the chemical composition, mechanical properties, and microstructure of the materials upon visible light irradiation. The photochemical treatment also induced changes in the swelling properties and transport mechanism in the gels due to the changes in material composition and microstructure. The AlgAam gels were biocompatible and could easily be dried and rehydrated with no change in mechanical properties. These gels showed promise as scaffolds for cartilage tissue engineering, where the photochemical treatment could be used to tune the properties of the material and ultimately change the growth and extracellular matrix production of chondrogenic cells. ATDC5 cells cultured on the hydrogels showed a greater than 2-fold increase in the production of sulfated glycosaminoglycans (sGAG) in the gels irradiated for 90 min compared to the dark controls. Our method provides a simple photochemical tool to postsynthetically control and adjust the chemical and mechanical environment in these gels, as well as the pore microstructure and transport properties. By changing these properties, we could easily access different levels of performance of these materials as substrates for tissue engineering.
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Affiliation(s)
- Giuseppe E Giammanco
- Center for Photochemical Sciences and Department of Chemistry. Bowling Green State University , Bowling Green, Ohio 43403, United States
| | - Bita Carrion
- Department of Biomedical Engineering, University of Michigan , Ann Arbor, Michigan, 48109 United States
| | - Rhima M Coleman
- Department of Biomedical Engineering, University of Michigan , Ann Arbor, Michigan, 48109 United States
| | - Alexis D Ostrowski
- Center for Photochemical Sciences and Department of Chemistry. Bowling Green State University , Bowling Green, Ohio 43403, United States
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Giammanco GE, Sosnofsky CT, Ostrowski AD. Light-responsive iron(III)-polysaccharide coordination hydrogels for controlled delivery. ACS APPLIED MATERIALS & INTERFACES 2015; 7:3068-3076. [PMID: 25591038 DOI: 10.1021/am506772x] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Visible-light responsive gels were prepared from two plant-origin polyuronic acids (PUAs), alginate and pectate, coordinated to Fe(III) ions. Comparative quantitative studies of the photochemistry of these systems revealed unexpected differences in the photoreactivity of the materials, depending on the polysaccharide and its composition. The roles that different functional groups play on the photochemistry of these biomolecules were also examined. Mannuronic-rich alginates were more photoreactive than guluronic acid-rich alginate and than pectate. The microstructure of alginates with different mannuronate-to-guluronate ratios changed with polysaccharide composition. This influenced the gel morphology and the photoreactivity. Coordination hydrogel beads were prepared from both Fe-alginate and Fe-pectate. The beads were stable carriers of molecules as diverse as the dye Congo Red, the vitamin folic acid, and the antibiotic chloramphenicol. The photoreactivity of the hydrogel beads mirrored the photoreactivity of the polysaccharides in solution, where beads prepared with alginate released their cargo faster than beads prepared with pectate. These results indicate important structure-function relationships in these systems and create guidelines for the design of biocompatible polysaccharide-based materials where photoreactivity and controlled release can be tuned on the basis of the type of polysaccharide used and the metal coordination environment.
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Affiliation(s)
- Giuseppe E Giammanco
- Center for Photochemical Sciences and Department of Chemistry, Bowling Green State University , Bowling Green, Ohio 43403, United States
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