Relevant bibliographies by topics / Biopolymers

Academic literature on the topic 'Biopolymers'

Author: Grafiati
Published: 4 June 2021
Last updated: 29 July 2024

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Journal articles on the topic "Biopolymers"

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Arrieta, Alvaro A., Yamid Nuñez de la Rosa, and Manuel Palencia. "Electrochemistry Study of Bio-Based Composite Biopolymer Electrolyte—Starch/Cardol." Polymers 15, no. 9 (April 23, 2023): 1994. http://dx.doi.org/10.3390/polym15091994.

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The environmental problems generated by pollution due to polymers of petrochemical origin have led to the search for eco-friendly alternatives such as the development of biopolymers or bio-based polymers. The aim of this work was to evaluate the electrochemical behavior of a biopolymer composite made from cassava starch and cardol extracted from cashew nut shell liquid. The biopolymers were prepared using the thermochemical method, varying the synthesis pH and the cardol amounts. The biopolymers were synthesized in the form of films and characterized by cyclic voltamperometry and electrochemical impedance spectroscopy. The biopolymers showed a rich electroactivity, with three oxidation–reduction processes evidenced in the voltamperograms. On the other hand, the equivalent circuit corresponding to the impedance behavior of biopolymers integrated the processes of electron transfer resistance, electric double layer, redox reaction process, and resistance of the biopolymeric matrix. The results allowed us to conclude that the cardol content and the synthesis pH were factors that affect the electrochemical behavior of biopolymer composite films. Electrochemical processes in biopolymers were reversible and involved two-electron transfer and were diffusion-controlled processes.
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Shamshina, Julia L., and Paula Berton. "Ionic Liquids as Designed, Multi-Functional Plasticizers for Biodegradable Polymeric Materials: A Mini-Review." International Journal of Molecular Sciences 25, no. 3 (January 31, 2024): 1720. http://dx.doi.org/10.3390/ijms25031720.

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Measures to endorse the adoption of eco-friendly biodegradable plastics as a response to the scale of plastic pollution has created a demand for innovative products from materials from Nature. Ionic liquids (ILs) have the ability to disrupt the hydrogen bonding network of biopolymers, increase the mobility of biopolymer chains, reduce friction, and produce materials with various morphologies and mechanical properties. Due to these qualities, ILs are considered ideal for plasticizing biopolymers, enabling them to meet a wide range of specifications for biopolymeric materials. This mini-review discusses the effect of different IL-plasticizers on the processing, tensile strength, and elasticity of materials made from various biopolymers (e.g., starch, chitosan, alginate, cellulose), and specifically covers IL-plasticized packaging materials and materials for biomedical and electrochemical applications. Furthermore, challenges (cost, scale, and eco-friendliness) and future research directions in IL-based plasticizers for biopolymers are discussed.
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Băbuțan, Mihai, and Ioan Botiz. "Morphological Characteristics of Biopolymer Thin Films Swollen-Rich in Solvent Vapors." Biomimetics 9, no. 7 (June 30, 2024): 396. http://dx.doi.org/10.3390/biomimetics9070396.

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Biopolymers exhibit a large variety of attractive properties including biocompatibility, flexibility, gelation ability, and low cost. Therefore, especially in more recent years, they have become highly suitable for a wider and wider range of applications stretching across several key sectors such as those related to food packaging, pharmaceutic, and medical industries, just to name a few. Moreover, biopolymers’ properties are known to be strongly dependent on the molecular arrangements adopted by such chains at the nanoscale and microscale. Fortunately, these arrangements can be altered and eventually optimized through a plethora of more or less efficient polymer processing methods. Here, we used a space-confined solvent vapor annealing (C-SVA) method to subject various biopolymers to rich swelling in solvent vapors in order to favor their further crystallization or self-assembly, with the final aim of obtaining thin biopolymer films exhibiting more ordered chain conformations. The results obtained by atomic force microscopy revealed that while the gelatin biopolymer nucleated and then crystallized into granular compact structures, other biopolymers preferred to self-assemble into (curved) lamellar rows composed of spherical nanoparticles (glycogen and chitosan) or into more complex helix-resembling morphologies (phytagel). The capability of the C-SVA processing method to favor crystallization and to induce self-assembly in various biopolymeric species or even monomeric units further emphasizes its great potential in the future structuring of a variety of biological (macro)molecules.
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Fatehi, Hadi, Dominic E. L. Ong, Jimmy Yu, and Ilhan Chang. "Biopolymers as Green Binders for Soil Improvement in Geotechnical Applications: A Review." Geosciences 11, no. 7 (July 15, 2021): 291. http://dx.doi.org/10.3390/geosciences11070291.

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Soil improvement using biopolymers has attracted considerable attention in recent years, with the aim to reduce the harmful environmental effects of traditional materials, such as cement. This paper aims to provide a review on the environmental assessment of using biopolymers as binders in soil improvement, biopolymer-treated soil characteristics, as well as the most important factors affecting the behavior of the treated soil. In more detail, environmental benefits and concerns about the use of biopolymers in soil improvement as well as biopolymer–soil interaction are discussed. Various geotechnical properties are evaluated and compared, including the unconfined compressive strength, shear strength, erosion resistance, physical properties, and durability of biopolymer-treated soils. The influential factors and soil and environmental conditions affecting various geotechnical characteristics of biopolymer-treated soils are also discussed. These factors include biopolymer concentration in the biopolymer–soil mixture, moisture condition, temperature, and dehydration time. Potential opportunities for biopolymers in geotechnical engineering and the challenges are also presented.
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Unger, Scott R., Troy A. Hottle, Shakira R. Hobbs, Cassandra L. Thiel, Nicole Campion, Melissa M. Bilec, and Amy E. Landis. "Do single-use medical devices containing biopolymers reduce the environmental impacts of surgical procedures compared with their plastic equivalents?" Journal of Health Services Research & Policy 22, no. 4 (May 22, 2017): 218–25. http://dx.doi.org/10.1177/1355819617705683.

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Background While petroleum-based plastics are extensively used in health care, recent developments in biopolymer manufacturing have created new opportunities for increased integration of biopolymers into medical products, devices and services. This study compared the environmental impacts of single-use disposable devices with increased biopolymer content versus typically manufactured devices in hysterectomy. Methods A comparative life cycle assessment of single-use disposable medical products containing plastic(s) versus the same single-use medical devices with biopolymers substituted for plastic(s) at Magee-Women’s Hospital (Magee) in Pittsburgh, PA and the products used in four types of hysterectomies that contained plastics potentially suitable for biopolymer substitution. Magee is a 360-bed teaching hospital, which performs approximately 1400 hysterectomies annually. Results There are life cycle environmental impact tradeoffs when substituting biopolymers for petroplastics in procedures such as hysterectomies. The substitution of biopolymers for petroleum-based plastics increased smog-related impacts by approximately 900% for laparoscopic and robotic hysterectomies, and increased ozone depletion-related impacts by approximately 125% for laparoscopic and robotic hysterectomies. Conversely, biopolymers reduced life cycle human health impacts, acidification and cumulative energy demand for the four hysterectomy procedures. The integration of biopolymers into medical products is correlated with reductions in carcinogenic impacts, non-carcinogenic impacts and respiratory effects. However, the significant agricultural inputs associated with manufacturing biopolymers exacerbate environmental impacts of products and devices made using biopolymers. Conclusions The integration of biopolymers into medical products is correlated with reductions in carcinogenic impacts, non-carcinogenic impacts and respiratory effects; however, the significant agricultural inputs associated with manufacturing biopolymers exacerbate environmental impacts.
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Frølund, B., K. Keiding, and P. H. Nielsen. "A Comparative Study of Biopolymers from a Conventional and an Advanced Activated Sludge Treatment Plant." Water Science and Technology 29, no. 7 (April 1, 1994): 137–41. http://dx.doi.org/10.2166/wst.1994.0326.

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Biopolymer characteristics from a traditional and an advanced activated sludge treatment plant performing biological N and P removal were compared. The biopolymers were extracted using an ion exchange resin (DOWEX in Na-form). Differences between chemical compositions of the total sludges were observed by measuring protein, polysaccharide and uronic acids whereas differences in the same compounds were not found in the extracted biopolymers. High Pressure Size Exclusion Chromatography was performed on the two biopolymer matrixes and differences were found in the biopolymer matrixes. Biopolymers from the advanced treatment plant contained two fractions of large and hydrophobic compounds which contributed to a major fraction of the chromatogram area. These peaks could only to a minor extent be found in the extracted biopolymers from the traditional treatment plant.
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Preiss, Laura C., Katharina Landfester, and Rafael Muñoz-Espí. "Biopolymer colloids for controlling and templating inorganic synthesis." Beilstein Journal of Nanotechnology 5 (November 17, 2014): 2129–38. http://dx.doi.org/10.3762/bjnano.5.222.

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Biopolymers and biopolymer colloids can act as controlling agents and templates not only in many processes in nature, but also in a wide range of synthetic approaches. Inorganic materials can be either synthesized ex situ and later incorporated into a biopolymer structuring matrix or grown in situ in the presence of biopolymers. In this review, we focus mainly on the latter case and distinguish between the following possibilities: (i) biopolymers as controlling agents of nucleation and growth of inorganic materials; (ii) biopolymers as supports, either as molecular supports or as carrier particles acting as cores of core–shell structures; and (iii) so-called “soft templates”, which include on one hand stabilized droplets, micelles, and vesicles, and on the other hand continuous scaffolds generated by gelling biopolymers.
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Lemboye, Kehinde, and Abdullah Almajed. "Effect of Varying Curing Conditions on the Strength of Biopolymer Modified Sand." Polymers 15, no. 7 (March 28, 2023): 1678. http://dx.doi.org/10.3390/polym15071678.

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Recently, the improvement of the engineering properties of soil has been centered on using sustainable and eco-friendly materials. This study investigates the efficacy of three biopolymers: Acacia, sodium alginate, and pectin, on the unconfined compressive strength (UCS) of dune sand. The UCS test measured the effects of the biopolymer type and concentration, curing intervals and temperature, and moisture loss. The changes in the morphology caused by the biopolymer addition were examined via scanning electron microscopy (SEM). Results indicate that the UCS of the biopolymer-modified sand increased with biopolymer concentration and curing intervals. Varying the curing temperature from 25–110 °C, slightly affected the strength of the acacia-modified sand specimen, increased that of the sodium alginate-modified sand specimen up to a temperature of 85 °C, and continued to decrease that of the pectin-modified sand specimen as the temperature was increased from 25 to 110 °C. The SEM images indicated that the biopolymer’s presence within the sand pores significantly contributed to the strength. Bond decomposition occurs at temperatures greater than 110 °C for sodium alginate and pectin-modified sands, whereas bonds remain stable at higher temperatures for the acacia-modified sand. In conclusion, all three biopolymers show potential as robust and economic dune stabilisers.
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Arrieta, Alvaro Angel, Jorge Alberto Ducuara, and Enrique Miguel Combatt. "Valorization of cashew nut processing by-product: development of a cardol/starch biopolymer composite with electrochemical properties and technological potential." Eastern-European Journal of Enterprise Technologies 3, no. 6 (123) (June 30, 2023): 32–41. http://dx.doi.org/10.15587/1729-4061.2023.282208.

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The problem of food agro-industry residues represents a growing concern in our society, therefore its use as a raw material to obtain biopolymers of technological interest is an attractive alternative. The objective of this work was to assess the viability of utilizing cardol, derived from cashew nut shell liquid, in the production of a biopolymer composite by combining it with cassava starch. The biopolymer composite was prepared by thermochemical method using different cardol concentrations and varying the synthesis pH. The results allowed us to demonstrate the formation of cardol/starch biopolymeric films. The infrared spectra showed possible interactions by hydrogen bonds between the cardol and the glucose units of the starch. The impedance behavior showed a similar conduction mechanism in all cases, allowing the establishment of a single equivalent circuit. The electrochemical parameters showed that the presence of cardol and the lower pH increased the values of the electrical resistance and the double layer capacitance in the biopolymers. In addition, the values of the CPE/Rre system, related to the electractivity, were not affected by the pH, but by the presence of cardol. The biodegradability tests showed a complete decomposition of the biopolymer composite films in three stages in a period of 17 to 19 days. It could be concluded that it is possible to use the cardol extracted from the cashew nut shell liquid to elaborate a biopolymer composite with electrochemical properties when combined with cassava starch. The electrical properties of the biopolymer can be modulated by varying the synthesis pH and the amount of cardol used. The composite cardol/starch biopolymer could be used as a biopolymeric solid electrolyte in the manufacture of batteries, capacitors, etc
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Kumar, M. Ashok, Arif Ali Baig Moghal, Kopparthi Venkata Vydehi, and Abdullah Almajed. "Embodied Energy in the Production of Guar and Xanthan Biopolymers and Their Cross-Linking Effect in Enhancing the Geotechnical Properties of Cohesive Soil." Buildings 13, no. 9 (September 10, 2023): 2304. http://dx.doi.org/10.3390/buildings13092304.

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Traditional soil stabilization techniques, such as cement and lime, are known for their menacing effect on the environment through heavy carbon emissions. Sustainable soil stabilization methods are grabbing attention, and the utilization of biopolymers is surely one among them. Recent studies proved the efficiency of biopolymers in enhancing the geotechnical properties to meet the requirements of the construction industry. The suitability of biopolymer application in different soils is still unexplored, and the carbon footprint analysis (CFA) of biopolymers is crucial in promoting the biopolymers as a promising sustainable soil stabilization method. This study attempts to investigate the out-turn of cross-linked biopolymer on soils exhibiting different plasticity characteristics (Medium & High compressibility) and to determine the Embodied carbon factor (ECF) for the selected biopolymers. Guar (G) and Xanthan (X) biopolymers were cross-linked at different proportions to enhance the geotechnical properties of soils. Atterberg’s limits, Compaction characteristics, and Unconfined Compressive Strength were chosen as performance indicators, and their values were analyzed at different combinations of biopolymers before and after cross-linking. The test results have shown that Atterberg’s limits of the soils increased with the addition of biopolymers, and it is attributed to the formation of hydrogels in the soil matrix. Compaction test results reveal that the Optimum Moisture Content (OMC) of biopolymer-modified soil increased, and Maximum Dry Density (MDD) reduced due to the resistance offered by hydrogel against compaction effort. Soils amended with biopolymers and cured for 14, 28, and 60 days have shown an appreciable improvement in Unconfined Compressive Strength (UCS) results. Microlevel analysis was carried out using SEM (Scanning Electron Microscopy) and FTIR (Fourier-transform infrared spectroscopy) to formulate the mechanism responsible for the alteration in targeted performance indicators due to the cross-linking of biopolymers in the soil. The embodied energy in the production of both Guar and Xanthan biopolymers was calculated, and the obtained ECF values were 0.087 and 1.67, respectively.
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Dissertations / Theses on the topic "Biopolymers"

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Kane, Aine T. M. "Investigation of biopolymers." Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282192.

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Richards, Dawn P. "Electrophoretic separations of biopolymers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0013/NQ59661.pdf.

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Gray, Robert A. "Flourophore labelling of biopolymers." Thesis, Coventry University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308085.

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Rahman, Alireza. "Control release from biopolymers." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/6074/.

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Control release from biopolymer is an important issue for flavour perception following to reduce flavour content such as salt in food formulation without any tangible change in taste. The experiments presented release behaviour from low acyl gellan gum gel. Attempts were focused to find a link between mechanical properties and microstructure of the gel. After conducting the compression tests, a number of parameters were investigated and the consist of the effect of the gellan concentration, salt concentration and cyclic compression on the mechanical properties of the gel. According to the results, mechanical properties of the gellan gels were remarkably affected by the gellan concentration, salt concentration and cyclic compression. It was shown that the gellan concentration, salt concentration and cyclic compression play a main role on the microstructure of the gel. The release experiments were carried out using uniaxial and cyclic compression to investigate the salt and riboflavin release from the gellan gel to identify the parameters which play a role on release from the gellan gel. Release experiments have shown that release profile is affected by the gellan concentration, salt concentration and number of cyclic compression. Results demonstrated that release profile can be affected by molecular weight of the releasable material.
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Catani, Linda. "Development and Characterization of Biopolymers." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20761/.

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Development and characterization of biopolymers was done in AIJU’s laboratories. AIJU, Technological Institute for children’s products and leisure is based in Spain. The work has the aim to study qualities and characteristics of bioplastics’ blends, in order to design where improvements can be executed. Biopolymers represent a sector with great development possibilities because they combine high technical potential and eco-sustainability. Nowadays, plastic pollution has becoming increasingly concerning, particularly in terms of management of waste. Bioplastics provide an alternative for the disposal of products, reducing the volume of waste and enhancing the end of life recovery. Despite the growing interest in biopolymers there is some gaps that need be filled. The main objective on this work, is the optimization of bioplastics mechanical properties, to find suitable substitutes, as similar as possible to conventional plastics. Firstly, investigations on processability of biomaterials has been deepen since the project deals with toy manufacturing’s sector. Thus, starting from laboratory scale the work aspires to expand industrially. By working with traditional machines, it was notable that, with some limited modifications, the equipment can perform the same functions. Therefore, operational processes do not emerge as an obstacle to the production chain. Secondly, after processing bio-blends, they are characterized by thermal tests (melt flow index, differential scanning calorimetry-DSC, thermogravimetry-TGA) and mechanical tests (traction and flexural tests, Charpy impact, SHORE D hardness and density). While the compatibility does not show relevant results, mechanical improvements has been visualized with addition of more ductile materials. The study was developed by inclusion of sustainable additive VINNEX® to blends. The thesis has highlighted that integration of more flexible materials provides elasticity without compromising bioplastics’ properties.
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Frohberg, Patrick [Verfasser]. "Protein-based biopolymers / Patrick Frohberg." Aachen : Shaker, 2017. http://d-nb.info/1124366040/34.

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Schnauß, Jörg, Tina Händler, and Josef A. Käs. "Semiflexible biopolymers in bundled arrangements." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-207973.

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Bundles and networks of semiflexible biopolymers are key elements in cells, lending them mechanical integrity while also enabling dynamic functions. Networks have been the subject of many studies, revealing a variety of fundamental characteristics often determined via bulk measurements. Although bundles are equally important in biological systems, they have garnered much less scientific attention since they have to be probed on the mesoscopic scale. Here, we review theoretical as well as experimental approaches, which mainly employ the naturally occurring biopolymer actin, to highlight the principles behind these structures on the single bundle level.
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Fiester, Steven E. "Characterization of Optically Active Biopolymers." Kent State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=kent1302187683.

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SCARPA, TOMMASO. "BIOPOLYMERS FOR CARTILAGE TISSUE-ENGINEERING." Doctoral thesis, Università degli studi di Trieste, 2007. http://thesis2.sba.units.it/store/handle/item/12302.

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Marenduzzo, Davide. "Phases of Polymers and Biopolymers." Doctoral thesis, SISSA, 2002. http://hdl.handle.net/20.500.11767/4581.

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In this thesis we develop coarse grained models aiming at understanding physical problems arising from phase transitions which occur at the single molecule level. The thesis will consist of two parts, grossly related to and motivated by the two subjects dealt with above. In the first half, we will focus on critical phenomena in stretching experiments, namely in DNA unzipping and polymer stretching in a bad solvent. In the second part, we will develop a model of thick polymers, with the goal of understanding the origin of the protein folds and the physics underlying the folding ‘transition’, as well as with the hope of shedding some light on some of the fundamental questions highlighted in this Introduction. In the first part of the thesis we will introduce a simple model of self-avoiding walks for DNA unzipping. In this way we can map out the phase diagram in the force vs. temperature plane. This reveals the present of an interesting cold unzipping transition. We then go on to study the dynamics of this coarse grained model. The main result which we will discuss is that the unzipping dynamics below the melting temperature obeys different scaling laws with respect to the opening above thermal denaturation, which is governed by temperature induced fluctuating bubbles. Motivated by this and by recent results from other theoretical groups, we move on to study the relation to DNA unzipping of the stretching of a homopolymer below the theta point. Though also in this case a cold unzipping is present in the phase diagram, this situation is richer from the theoretical point of view because the physics depends crucially on dimension: the underlying phase transition indeed is second order in two dimensions and first order in three. This is shown to be intimately linked to the failure of mean field in this phenomena, unlike for DNA unzipping. In particular, the globule unfolds via a series (hierarchy) of minima. In two dimensions they survive in the thermodynamic limit whereas if the dimension, d, is greater than 2, there is a crossover and for very long polymers the intermediate minima disappear. We deem it intriguing that an intermediate step in this minima hierarchy for polymers of finite length in the three-dimensional case is a regular mathematical helix, followed by a zig-zag structure. This is found to be general and almost independent of the interaction potential details. It suggests that a helix, one of the well-known protein secondary structure, is a natural choice for the ground state of a hydrophobic protein which has to withstand an effective pulling force. In the second part, we will follow the inverse route and ask for a minimal model which is able to account for the basic aspects of folding. By this, we mean a model which contains a suitable potential which has as its ground state a protein-like structure and which can account for the known thermodynamical properties of the folding transition. The existing potential which are able to do that[32] are usually constructed ‘ad hoc’ from knowledge of the native state. We stress that our procedure here is completely different and the model which we propose should be built up starting from minimal assumptions. Our main result is the following. If we throw away the usual view of a polymer as a sequence of hard spheres tethered together by a chain (see also Chapter 1) and substitute it with the notion of a flexible tube with a given thickness, then upon compaction our ’thick polymer’ or ’tube’ will display a rich secondary structure with protein-like helices and sheets, in sharp contrast with the degenerate and messy crumpled collapsed phase which is found with a conventional bead-and-link or bead-and-spring homopolymer model. Sheets and helices show up as the polymer gets thinner and passes from the swollen to the compact phase. In this sense the most interesting regime is a ‘twilight’ zone which consists of tubes which are at the edge of the compact phase, and we thus identify them as ‘marginally compact strucures’. Note the analogy with the result on stretching, in which the helices were in the same way the ‘last compact’ structures or the ‘first extended’ ones when the polymer is being unwinded by a force. After this property of ground states is discussed, we proceed to characterize the thermodynamics of a flexible thick polymer with attraction. The resulting phase diagram is shown to have many of the properties which are usually required from protein effective models, namely for thin polymers there is a second order collapse transition (O collapse) followed, as the temperature is lowered, by a first order transition to a semicrystalline phase where the compact phase orders forming long strands all aligned preferentially along some direction. For thicker polymers the transition to this latter phase occurs directly from the swollen phase, upon lowering T, through a first order transition resembling the folding transition of short proteins.
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Books on the topic "Biopolymers"

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Nadda, Ashok Kumar, Swati Sharma, and Rajeev Bhat, eds. Biopolymers. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-98392-5.

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Imam, Syed H., Richard V. Greene, and Baqar R. Zaidi, eds. Biopolymers. Washington, DC: American Chemical Society, 1999. http://dx.doi.org/10.1021/bk-1999-0723.

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Kalia, Susheel, and Luc Avérous, eds. Biopolymers. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118164792.

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Abe, Akihiro, Karel Dusek, and Shiro Kobayashi, eds. Biopolymers. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-13630-6.

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Gupta, Neal S. Biopolymers. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-7936-5.

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Elnashar, Magdy M. Biopolymers. Rijeka: Sciyo, 2010.

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A, Steinbüchel, and Hofrichter M, eds. Biopolymers. Weinheim: Wiley-VCH, 2001.

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Endres, Hans-Josef, and Andrea Siebert-Raths. Engineering Biopolymers. München: Carl Hanser Verlag GmbH & Co. KG, 2011. http://dx.doi.org/10.3139/9783446430020.

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Olatunji, Ololade. Aquatic Biopolymers. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-34709-3.

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Langer, Robert S., and Nicholas A. Peppas, eds. Biopolymers I. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/bfb0027549.

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Book chapters on the topic "Biopolymers"

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Abdul Khalil, H. P. S., M. R. Nurul Fazita, and N. Mohd Nurazzi. "Biodegradation and Compostable Biopolymers." In Biopolymers and Biopolymer Blends, 105–24. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003416043-2.

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Abdul Khalil, H. P. S., M. R. Nurul Fazita, and N. Mohd Nurazzi. "Characteristics and Performance of Emerging Biopolymers from Sugar Palm Starch for Packaging." In Biopolymers and Biopolymer Blends, 308–30. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003416043-9.

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Abdul Khalil, H. P. S., M. R. Nurul Fazita, and N. Mohd Nurazzi. "Crosslinking Networks of Functional Biopolymer Hydrogels." In Biopolymers and Biopolymer Blends, 357–65. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003416043-11.

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Abdul Khalil, H. P. S., M. R. Nurul Fazita, and N. Mohd Nurazzi. "Biopolymer Composites." In Biopolymers and Biopolymer Blends, 1–104. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003416043-1.

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Abdul Khalil, H. P. S., M. R. Nurul Fazita, and N. Mohd Nurazzi. "State-of-the-Art Natural Biopolymers for Bionanocomposites." In Biopolymers and Biopolymer Blends, 125–60. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003416043-3.

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Abdul Khalil, H. P. S., M. R. Nurul Fazita, and N. Mohd Nurazzi. "Biopolymers in 3D Printing Technology." In Biopolymers and Biopolymer Blends, 161–92. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003416043-4.

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Abdul Khalil, H. P. S., M. R. Nurul Fazita, and N. Mohd Nurazzi. "Applications of Biopolymer Blends and Biopolymer-Based Nanocomposites." In Biopolymers and Biopolymer Blends, 193–253. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003416043-5.

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Abdul Khalil, H. P. S., M. R. Nurul Fazita, and N. Mohd Nurazzi. "Biopolymers for Drug Delivery Applications." In Biopolymers and Biopolymer Blends, 331–56. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003416043-10.

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Abdul Khalil, H. P. S., M. R. Nurul Fazita, and N. Mohd Nurazzi. "Seaweed-Based Biopolymers for Sustainable Applications." In Biopolymers and Biopolymer Blends, 284–307. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003416043-8.

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Abdul Khalil, H. P. S., M. R. Nurul Fazita, and N. Mohd Nurazzi. "Starch-Based Films with Essential Oils for Antimicrobial Food Packaging." In Biopolymers and Biopolymer Blends, 254–72. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003416043-6.

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Conference papers on the topic "Biopolymers"

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GENNARI, Roseli Fernandes, Gilson GOVEIA, and José Fernando Diniz CHUBACI. "BIOPOLYMERS AS DOSIMETERS - A PROPOSAL." In SOUTHERN BRAZILIAN JOURNAL OF CHEMISTRY 2021 INTERNATIONAL VIRTUAL CONFERENCE. DR. D. SCIENTIFIC CONSULTING, 2022. http://dx.doi.org/10.48141/sbjchem.21scon.42_abstract_gennari.pdf.

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The radiation study has led to advances in various areas of our everyday lives despite that several events had occurred, causing health damage to several researchers. Thus, if somebody wants to study irradiation effects on materials must use equipment that quantifies the radiation received. Dosimeters do this quantification of ionizing radiation. There are numerous applications for ionizing radiation so far, and many materials can be used for dosimetric purposes. Despite that, there is always a constant search for new materials, focusing on more efficient processes or less environmental impact. For dosimetric purposes, the material has to be radiation sensitive. Many materials have been the subject of research recently, aiming to be environment friendly: among them, we can mention biopolymers that have the great advantage of being biodegradable. A commercial solid-state dosimeter uses silver-activated phosphate glass for radiophotoluminescence (RPL) purposes. This dosimeter has an enormous advantage since it does not lose the dose information after dose reading. It can be reread many times until annealing is done to reset the exposure condition. It can be reused several times. This dosimeter is commercially available as “GD-450” (Chiyoda Technol Corporation). Our research group successfully proposed using silicate glass instead of phosphate glass as RPL dosimeters. Face to the need for a high-temperature furnace for glass sintering, and it was decided to test biopolymers as RPL dosimeters. Once our goal was to have a regenerative dosimeter, we used silver as a sensible radiation element. This work it was synthesized two biopolymers with and without adding silver to them. The biopolymers synthesized used starch and collagen as polymer base material. The biopolymers analysis was done by microscopy and by optical spectrometry (UV-Vis-NIR). We observed irradiation effects on absorption bands from biopolymer of collagen doped with silver.
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Howard, S., and Montogomery, TX. "Long-term Coreflood Testing with Biopolymers—A Laboratory Investigation Showing How Return Permeability Improves From 0 to 100 Percent by Getting a Critical Parameter Right." In SPE International Conference and Exhibition on Formation Damage Control. SPE, 2024. http://dx.doi.org/10.2118/217909-ms.

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Abstract A series of long-term coreflood tests has shown the importance of considering the self-breaking rate of biopolymers when designing coreflood tests of low-solids and solids-free brine-based drilling and completion fluids that naturally contaminate the core plug with biopolymers during testing. The tests were conducted with a solids-free potassium formate brine–based reservoir drilling fluid, formulated with xanthan gum and starch, which when exposed to overbalanced pressure, invaded deep into the core plug. The coreflood test simulated filtrate invasion into a water-saturated formation while drilling an injection well. In this scenario the core plug was initially 100% saturated with formation water, and return permeability was measured by injecting formation water through the core in the same direction as the test fluid filtrate invasion. Testing was conducted at two temperatures, 121 and 149°C (250 and 300°F). At both test temperatures there was a very good correlation between the cleanup or permeability recovery rate of the core plug and the biopolymer self-breaking rates, which had been measured in an earlier study. Due to the low cleanup rate at the lowest temperature, this test was terminated as soon as the cleanup rate was fully established, and the testing was continued at the higher temperature until the permeability had reached close to 100% of its initial value. The initial 49-hours cleanup with formation water at 121°C (250°F) resulted in a return permeability to formation water of only 3.8%, explaining why laboratory coreflood tests with low-solids/solids-free brine-based drilling and completion fluids containing biopolymeric additives are generally unable to reproduce or predict the excellent well performance the same fluids deliver in the field after days, weeks, or months of steady clean-up. The results also give us useful insights into what to expect when such fluids are used to drill injection wells. Although the biopolymer self-breaking rate is much higher in the low-salinity injection water, it takes time for biopolymers to break down enough in the protective ionic environment of the formate brine for the filtrate to be diluted and displaced locally by the flow of injection water. The desire to reduce fluid screening and qualification costs unfortunately often means that reservoir drilling and completion fluid selection decisions are based on the results of short-term coreflood tests. This may be the correct procedure for fluids that cause permanent intractable damage from solids plugging. However, for solids-free or low-solids fluids containing self-breaking biopolymers, relying on such short-term tests can mean that the wrong fluid selection decisions are made.
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Ullah, Aman, Dries Vandamme, and Tariq Siddique. "Protein based biopolymers as sorbents for treatment of industrial wastewater." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/vcxu4079.

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The industrial waste water produced during the extraction or refining of natural resources is highly contaminated with organic and inorganic contents, which requires a complex and expensive treatment. Therefore, water contamination and its treatment has become a global issue of concern. Particularly oil sands operations consume large amounts of water in bitumen extraction process. Our study involves the use of chemically modified keratin protein (poultry feathers) as a sorbent for treating waste water. Poultry feathers, abundant waste material and huge source of keratin (over 91% keratin biopolymer), have tremendous potential for producing biopolymers for large-scale applications. The overall goal of our research is to provide industry with a sorbent material that is both effective as well as economically viable for industrial scale wastewater treatment. Different modified biopolymers were used as sorbents to treat oil sands process-affected water (OSPW) to sorb metals and naphthenic acids present in wastewater. The modified biopolymers were tested against OSPW maintained at ionic strength of 0.05 and spiked with up to 50 ppb of 9 trace elements (SeIV, Cu, Zn, AsIII, Pb, Ni, VV, CrVI, and Co). The OSPW solutions were treated with 1% biopolymers for 24 hours followed by centrifugation and analysis using ICP-MS and FTIR spectroscopy. of the biosorbents showed high sorption capacity for both type of contaminants (naphthenic acid and metals). The results demonstrated that through proper tuning of functionalities, the biopolymers can be highly effective for sorption of trace metals and naphthenic acids. The high sorption capacity, cheap bioresource, and simplicity of the modifications suggest that there is great potential for an industrial scale viability of the process.
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Ouchen, Fahima, Emily Heckman, Larry Dalton, and James Grote. "Biopolymers in optoelectronics." In SPIE OPTO, edited by Christopher E. Tabor, François Kajzar, Toshikuni Kaino, and Yasuhiro Koike. SPIE, 2015. http://dx.doi.org/10.1117/12.2083021.

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FRITH, W. J., and I. T. NORTON. "MECHANICAL PROPERTIES OF MODEL COMPOSITES PRODUCED FROM FOOD BIOPOLYMERS: INFLUENCE OF BIOPOLYMER-BIOPOLYMER INTERFACIAL PROPERTIES." In Proceedings of the Fifth Royal Society–Unilever Indo-UK Forum in Materials Science and Engineering. A CO-PUBLICATION OF IMPERIAL COLLEGE PRESS AND THE ROYAL SOCIETY, 2000. http://dx.doi.org/10.1142/9781848160163_0019.

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Kamali Khanghah, Zahra, Miguel Moreno Tenorio, Judith Brown, Guilherme Mainieri Eymael, and Mohammad Ghashami. "Investigation of Passive Radiative Cooling Using Biopolymers." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-97143.

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Abstract Passive thermal radiative cooling (PTRC) has drawn massive attention in the past few years due to its advantages, including excellent cooling potential, no emission of greenhouse gases, silent operation, low maintenance, and off-grid operation. PTRC has been successfully demonstrated to reduce the electricity consumption required for cooling and ventilation of buildings. Several radiative emitters have been studied in the literature, such as pigmented paints, nanoparticle-based coatings, photonic crystals, metamaterials, and polymers. Among them, polymers have proven to be inherently strong infrared (IR) emitters, scalable, low-cost, flexible, easy to apply, and durable candidates. In addition to these features, biopolymers are eco-friendly and currently abundant in the market. Despite their significant advantages, there have been limited studies on the applications of biopolymers for radiative cooling. In this study, we report promising performances from a commercially available, affordable, and applicable biopolymer, cellulose, as a PTRC emitter. We fabricated several cellulose films with various structural characteristics and thicknesses. The emissivity and reflectivity of these emitter surfaces were measured for the desired wavelengths and direction. The obtained measurements reveal relatively high magnitudes of diffuse emissivity in the atmospheric window and high reflectivity in the solar spectrum range. Using the materials’ reflectivity and emissivity data, we theoretically calculated the net cooling power and the expected temperature drop. Each emitter demonstrated high cooling power and considerable temperature reduction based on the average recorded weather conditions in Lincoln, NE.
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Kettwig, Henry, Daniel Frizlaff, Patrick Otto, Gunther Naumann, Kathrin Harre, and Yvonne Joseph. "Electrical Properties of Biopolymers." In 2019 42nd International Spring Seminar on Electronics Technology (ISSE). IEEE, 2019. http://dx.doi.org/10.1109/isse.2019.8810301.

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Parkin, Simon, Gregor Knöner, Timo A. Nieminen, Norman R. Heckenberg, and Halina Rubinsztein-Dunlop. "Optical microrheology of biopolymers." In Microelectronics, MEMS, and Nanotechnology, edited by Derek Abbott, Yuri S. Kivshar, Halina H. Rubinsztein-Dunlop, and Shanhui Fan. SPIE, 2005. http://dx.doi.org/10.1117/12.651754.

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Ahmad I Athamneh, Michael Griffin, Meocha Whaley, and Justin R Barone. "Plasticization Regimes in Biopolymers." In 2008 Providence, Rhode Island, June 29 - July 2, 2008. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2008. http://dx.doi.org/10.13031/2013.24808.

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Siqueira Zatta, Pedro, Beatriz Jacob Furlan, Rafaela Mirabile, Rafael Silva Ribeiro Gonçalves, Paulo Alexandre Silveira da Silva, Dhyogo Miléo Taher, Gilvana Scoculi de Lira, Lauber Martins, Juan Ordonez, and JOSÉ VIRIATO COELHO VARGAS. "MICROALGAE BIOPOLYMERS: A REVIEW." In 19th Brazilian Congress of Thermal Sciences and Engineering. ABCM, 2022. http://dx.doi.org/10.26678/abcm.encit2022.cit22-0014.

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Reports on the topic "Biopolymers"

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Possidónio, Catarina, Ana Rita Farias, Samuel Domingos, Bernardo Cruz, Sílvia Luís, and Ana Loureiro. Exploring supply-side barriers for commercialization of new biopolymer production technologies: A systematic review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, May 2023. http://dx.doi.org/10.37766/inplasy2023.5.0076.

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Review question / Objective: What are the multi-level supply-side barriers to the commercialization of new biopolymer production technologies? Condition being studied: Biopolymers are sustainable and environmentally friendly alternatives to traditional petroleum-based polymers, and their use is becoming increasingly important for reducing the negative impact of plastic waste on the environment. Despite the potential benefits of biopolymers, their commercialization might face several supply-side barriers. This systematic review aims the identification and characterization of these barriers. The focus is on understanding the challenges involved in the commercialization of new biopolymer production technologies, which may include technological, economic, regulatory, and social factors that can affect the adoption and use of biopolymers in various industries. The question studied in this systematic review is relevant to a broad range of stakeholders, including researchers, policymakers, and industry professionals involved in the development, production, and commercialization of new biopolymer technologies. By providing a comprehensive synthesis of the existing literature on the multi-level supply-side barriers that can hinder the commercialization of new biopolymer production technologies, this systematic review aims to inform future research, policy, and practice to facilitate the successful implementation of these technologies.
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Richards, John H., John N. Abelson, Leroy E. Hood, Melvin I. Simon, and Judith L. Campbell. Biopolymers: Protein and Nucleic Acids. Fort Belvoir, VA: Defense Technical Information Center, September 1987. http://dx.doi.org/10.21236/ada185837.

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Ayyaswamy, Venkattraman. Plasma-assisted surface modification of biopolymers. Office of Scientific and Technical Information (OSTI), March 2024. http://dx.doi.org/10.2172/2326917.

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Smith, R. E. Models of the solvent-accessible surface of biopolymers. Office of Scientific and Technical Information (OSTI), September 1996. http://dx.doi.org/10.2172/378845.

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Benner, Steven A. Novel Biopolymers Based on an Expanded Genetic Alphabet. Fort Belvoir, VA: Defense Technical Information Center, February 1999. http://dx.doi.org/10.21236/ada360278.

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Leschine, Susan. MICROBIAL FERMENTATION OF ABUNDANT BIOPOLYMERS: CELLULOSE AND CHITIN. Office of Scientific and Technical Information (OSTI), October 2009. http://dx.doi.org/10.2172/966702.

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Arad, Shoshana, and Joseph Ramus. Agroproduction of Viscoelastic Biopolymers from Unicellular Red Algae. United States Department of Agriculture, September 1985. http://dx.doi.org/10.32747/1985.7566589.bard.

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Sarikaya, Mehmet, James T. Staley, and Ilahn A. Aksay. Processing of Ceramics by Biopolymers. Ultrastructure-Property Relationships in Biocrystals. Fort Belvoir, VA: Defense Technical Information Center, October 1991. http://dx.doi.org/10.21236/ada243061.

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Sun, Ning. Advancing Downstream Processing of Biopolymers from Methane: CRADA Final Report. Office of Scientific and Technical Information (OSTI), March 2024. http://dx.doi.org/10.2172/2324605.

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Scheller, Henrik. Glycobiology in yeast: production of bio-ative biopolymers and small molecules. Office of Scientific and Technical Information (OSTI), April 2014. http://dx.doi.org/10.2172/1283101.

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