Bibliografías temáticas / Crosslinking chemistry

Literatura académica sobre el tema "Crosslinking chemistry"

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Publicado: 4 de mayo de 2024

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Artículos de revistas sobre el tema "Crosslinking chemistry"

OTSUKA, HIROYUKI. "Chemistry of Crosslinking." NIPPON GOMU KYOKAISHI 69, n.º 4 (1996): 271–79. http://dx.doi.org/10.2324/gomu.69.271.

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Saletti, Mario, Marco Paolino, Lavinia Ballerini, Germano Giuliani, Gemma Leone, Stefania Lamponi, Marco Andreassi et al. "Click-Chemistry Cross-Linking of Hyaluronan Graft Copolymers". Pharmaceutics 14, n.º 5 (11 de mayo de 2022): 1041. http://dx.doi.org/10.3390/pharmaceutics14051041.

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An easy and viable crosslinking procedure by click-chemistry (click-crosslinking) of hyaluronic acid (HA) was developed. In particular, the clickable propargyl groups of hyaluronane-based HA-FA-Pg graft copolymers showing low and medium molecular weight values were exploited in crosslinking by click-chemistry by using a hexa(ethylene glycol) spacer. The resulting HA-FA-HEG-CL materials showed an apparent lack of in vitro cytotoxic effects, tuneable water affinity, and rheological properties according to the crosslinking degree that suggests their applicability in different biomedical fields.

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Jumnongpon, R., S. Chaiseri, P. Hongsprabhas, J. P. Healy, S. J. Meade y J. A. Gerrard. "Cocoa protein crosslinking using Maillard chemistry". Food Chemistry 134, n.º 1 (septiembre de 2012): 375–80. http://dx.doi.org/10.1016/j.foodchem.2012.02.189.

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Kulkarni, Akshata, Coleen Pugh, Sadhan C. Jana, Darnell T. Wims y Ammar Abdel Gawad. "CROSSLINKING OF SBR COMPOUNDS FOR TIRE TREAD USING BENZOCYCLOBUTENE CHEMISTRY". Rubber Chemistry and Technology 92, n.º 1 (1 de enero de 2019): 25–42. http://dx.doi.org/10.5254/rct.18.81512.

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ABSTRACT This research investigates the potential of benzocyclobutene (BCB) chemistry for crosslinking styrene-butadiene rubber in conjunction with sulfur curatives with the objective of achieving curing at lower temperatures and/or in shorter times compared with entirely sulfur-based cure formulations. The reversible polysulfidic linkages produced in sulfur crosslinking allow self-healing characteristics but suffer from poor heat-aging stability. The C–C crosslinks from BCB chemistry are irreversible and offer higher resistance to aging, but they do not present apparent self-healing properties. The hybrid curative package based on C–C, C–S, and S–S linkages developed is expected to provide reduced crosslinking time and/or temperature, along with higher crack-growth resistance, the ability to self-heal, higher resistance to fatigue-to-failure, reduced hysteresis, and increased abrasion resistance. The crosslinking performance of 1-substituted BCB-based compounds in conjunction with sulfur is specifically investigated.

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Datta, R. N., A. G. Talma y A. H. M. Schotman. "Comparative Studies on the Crosslinking Reaction of Bis-Maleimides and Bis-Citraconimides in Squalene and Natural Rubber". Rubber Chemistry and Technology 71, n.º 5 (1 de noviembre de 1998): 1073–86. http://dx.doi.org/10.5254/1.3538511.

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Abstract A study has been made to differentiate between the crosslinking reaction of bis-maleimides and bis-citraconimides in squalene as well as in natural rubber. Bis-maleimides are found to participate in the crosslinking reaction in the absence of curatives such as accelerators and sulfur. Bis-citraconimides take part in the crosslinking reaction when polysulfidic crosslinks are under the process of degradation. Sulfur and accelerator are required for the formation of polysulfidic crosslinks and hence the presence of sulfur and accelerator are essential for bis-citraconimide crosslinking. The differences in the reactivity and the chemistry of crosslinking are studied and discussed. Some application data are provided in order to elaborate the differences.

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Walker, Kenneth A., Larry J. Markoski, Gary A. Deeter, Gary E. Spilman, David C. Martin y Jeffrey S. Moore. "Crosslinking chemistry for high-performance polymer networks". Polymer 35, n.º 23 (noviembre de 1994): 5012–17. http://dx.doi.org/10.1016/0032-3861(94)90657-2.

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Petersen, H. "The chemistry of crease-resist crosslinking agent". Review of Progress in Coloration and Related Topics 17, n.º 1 (23 de octubre de 2008): 7–22. http://dx.doi.org/10.1111/j.1478-4408.1987.tb03747.x.

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Streubel, Rainer. "Crosslinking in Molecular Main Group Element Chemistry". Angewandte Chemie International Edition 45, n.º 39 (6 de octubre de 2006): 6418–19. http://dx.doi.org/10.1002/anie.200603708.

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Human, Paul, Chima Ofoegbu, Helen Ilsley, Deon Bezuidenhout, Jandre de Villiers, David F. Williams y Peter Zilla. "Decellularization and engineered crosslinking: a promising dual approach towards bioprosthetic heart valve longevity". European Journal of Cardio-Thoracic Surgery 58, n.º 6 (7 de septiembre de 2020): 1192–200. http://dx.doi.org/10.1093/ejcts/ezaa257.

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Abstract OBJECTIVES While decellularization has previously significantly improved the durability of bioprosthetic tissue, remnant immunogenicity may yet necessitate masking through crosslinking. To alleviate the fears of reintroducing the risk of calcific degeneration, we investigated the application of rationally designed crosslinking chemistry, capable of abrogating mineralization in isolation, in decellularized tissue. METHODS Bovine and porcine pericardium were decellularized using the standard Triton X/sodium deoxycholate/DNAse/RNAse methodology and thereafter combined incrementally with components of a four-stage high-density dialdehyde-based fixation regimen. Mechanical properties prior to, and calcium levels following, subcutaneous implantation for 6 and 10 weeks in rats were assessed. RESULTS Enhanced four-stage crosslinking, independent of decellularization, or decellularization followed by any of the crosslinking regimens, achieved sustained, near-elimination of tissue calcification. Decellularization additionally resulted in significantly lower tissue stiffness and higher fatigue resistance in all groups compared to their non-decellularized counterparts. CONCLUSIONS The dual approach of combining decellularization with enhanced crosslinking chemistry in xenogeneic pericardial tissue offers much promise in extending bioprosthetic heart valve longevity.

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Wang, Zixiao, Feichen Cui, Yang Sui y Jiajun Yan. "Radical chemistry in polymer science: an overview and recent advances". Beilstein Journal of Organic Chemistry 19 (18 de octubre de 2023): 1580–603. http://dx.doi.org/10.3762/bjoc.19.116.

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Radical chemistry is one of the most important methods used in modern polymer science and industry. Over the past century, new knowledge on radical chemistry has both promoted and been generated from the emergence of polymer synthesis and modification techniques. In this review, we discuss radical chemistry in polymer science from four interconnected aspects. We begin with radical polymerization, the most employed technique for industrial production of polymeric materials, and other polymer synthesis involving a radical process. Post-polymerization modification, including polymer crosslinking and polymer surface modification, is the key process that introduces functionality and practicality to polymeric materials. Radical depolymerization, an efficient approach to destroy polymers, finds applications in two distinct fields, semiconductor industry and environmental protection. Polymer chemistry has largely diverged from organic chemistry with the fine division of modern science but polymer chemists constantly acquire new inspirations from organic chemists. Dialogues on radical chemistry between the two communities will deepen the understanding of the two fields and benefit the humanity.

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Tesis sobre el tema "Crosslinking chemistry"

Sisson, Thomas Michael 1966. "Crosslinking polymerization in supramolecular assemblies". Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282566.

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Supramolecular assemblies are composed of noncovalently associated molecules which organize in water to yield 2-D and 3-D architectures. Crosslinking polymerization of supramolecular assemblies provides an effective means to modify their chemical and physical properties. Two methods of characterizing crosslinked polymeric assemblies were developed. These techniques rely on experimentally observed changes in polymer solubility and assembly stability in the presence of nonionic surfactants. The results show an inefficient crosslinking mechanism in organized media compared to isotropic polymerization. Two models rationalizing the inefficient crosslinking observed in organized media were proposed. Symmetrical crosslinking agents were synthesized to test the models. These results suggest intramolecular memorialization is an important process in the efficiency of crosslinking. The polymerization of a heterobifunctional lipid with two polymerizable groups in the same acyl chain separated by a six carbon spacer yielded a novel linear ladder-like polymer architecture. The two reactive groups are in regions of different polarity allowing for the simultaneous, selective, and sequential polymerization depending on the initiation chemistry employed. A second heterobifunctional lipid was designed and synthesized with a longer spacer between the two reactive groups. Polymerization of vesicles gave stable polymeric vesicles. The results from the crosslinking and redox polymerization studies on 2-D assemblies were applied to the inverted hexagonal and bicontinuous cubic phases. Phase behavior is characterized before and after crosslinking polymerization principally by variable temperature ³¹NMR. γ-Initiated polymerization of bis-lipids was studied to evaluate their sensitivity to ionizing radiation. The reactive moiety effects the initial rate of polymerization, extent of polymerization, and inhibition by oxygen. A preliminary investigation of polymerizable ion-paired amphiphiles (IPA) showed polymerization methods commonly used for zwitterionic lipids can be applied to IPA. This is the first report of polymerization of reactive groups in the anionic acyl chain of an ion-paired amphiphile.

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Briceno, Garcia Ruben Dario. "Crosslinking of ethylene copolymers from epoxy chemistry". Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0037.

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La plupart des couches d'isolation de câbles pour la moyenne tension "MV" et haute tension "HV" sont fabriquées en polyéthylène réticulé (XLPE) par voie peroxyde. L'impact des sous-produits de réaction sur les propriétés et la nécessité d'une étape de dégazage au cours du processus sont les principaux problèmes liés à cette technologie. Cette étude se concentre sur le développement d'une méthode de réticulation alternative sans les problèmes liés aux sous-produits. Des copolymères d’éthylène/époxy ont été réticulés thermiquement en utilisant un agent aminoacide pour créer des liaisons covalentes entre les fonctions époxydes. L’influence de différents paramètres sur la cinétique de réaction tels que la température de réticulation, les proportions aminoacide/époxy, la taille des particules de l’aminoacide et la teneur en époxy dans les copolymères a été étudiée par techniques de caractérisation telles que : rhéologie dynamique, spectrométrie FTIR, microscopie à balayage électronique et calorimétrie différentielle. En outre, l'étude de la structure du réseau avant et pendant un vieillissement thermique a été effectuée par différentes techniques (mesures de gonflement, spectroscopie FTIR, propriétés de traction et thermoporosimétrie) sur deux types de réseaux : un pré-contraint et un autre non-contraint. Enfin, une caractérisation des propriétés électriques par spectroscopie diélectriques et mesures de claquage électrique a été faite. Les résultats concernant les cinétiques de réaction, les propriétés thermomécaniques et le comportement électrique ont montré que la formulation développée dans cette étude peut être utilisée pour une application de câble
Most of insulation layers of cables for medium voltage “MV” and high voltage “HV” applications are made of crosslinked polyethylene (XLPE) by peroxide technology. The impact of reaction by-products on properties and the consequential need of a degassing stage during the process are the main problems related to this technology. This study focuses on the development of an alternative crosslinking method without by-products issues. Epoxy-ethylene copolymers were thermally crosslinked by using an amino-acid agent to create covalent cross-links between epoxide functions. Influence of several parameters on kinetic reactions such as crosslinking temperature, amino acid/epoxy proportions, size particle of amino acid and epoxy content in copolymers were studied by characterization techniques such as: dynamic rheology, FTIR spectrometry, SEM microscopy and differential calorimetry. In addition, study of the network structure before and during a thermal aging was done on a pre-constrained and a non-constrained network by different techniques (swelling ratio measurement, FTIR spectroscopy, tensile properties and thermoporosimetry analysis). Finally, a characterization of electrical properties by dielectric spectroscopy and breakdown measurements was done. Results related to reaction kinetic, thermo-mechanical properties and electrical behavior have shown that the developed formulation can be used for cable application

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Chiu, Yuen-Yuen. "Experimental and theoretical analysis of free radical crosslinking polymerizations /". The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu148785841798507.

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Budd, Michael E. "Exploiting thermally-reversible chemistry for controlling the crosslinking of polymer networks". Thesis, University of Reading, 2016. http://centaur.reading.ac.uk/63177/.

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High explosives are highly sensitive to accidental detonation by impact, fire, shrapnel and small arms fire. This sensitivity can be reduced by storing the energetic material within a rubbery polymer matrix and are known as plastic bonded explosives (PBX). The current procedure used to manufacture PBX involves mixing the energetic material with a hydroxy-functionalised aliphatic polymer. Upon the addition of an isocyanate crosslinker an immediate polymerisation occurs and thus the rapidly curing mixture must be used to fill the missile or shells, referred to as ‘stores’. This process can lead to poor distribution of the crosslinker resulting in the formation of an inhomogeneously crosslinked matrix and the formation of voids. One solution to this problem involves containing the crosslinker within polyurethane microcapsules that are uniformly dispersed in the explosive-polymer mixture. Upon the application of a stimulus the crosslinker can be released from the microcapsules and the formation of a uniformly crosslinked PBX achieved. Herein is reported the design and synthesis of polyurethane microcapsules that release isocyanate crosslinkers when desired using a thermal stimulus. This has been achieved by exploiting the thermally-reversible nature of oxime-urethane and Diels-Alder adducts that have been incorporated into the shell wall of the microcapsules. An alternative approach to controlling the polymerisation of PBX materials has also been achieved using thermally-reversible blocked isocyanates that regenerate the isocyanate crosslinker when exposed to heat.

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Bilgen, Mustafa. "Wrinkle Recovery for Cellulosic Fabric by Means of Ionic Crosslinking". NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-04202005-140912/.

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When treated with formaldehyde-based crosslinkers, cellulosic fabrics show improved mechanical stability, wrinkle recovery angles and durable press performance, but N-methylol treatment also causes fabrics to lose strength and later to release formaldehyde, a known human carcinogen. We have discovered that ionic crosslinks can stabilize cellulose using high or low molecular weight ionic materials which do not release hazardous reactive chemicals, but at the same time provide improved wrinkle recovery angles as well as complete strength retention in treated goods. We have varied polyelectrolyte, the ionic content of fabrics, and various features of the application procedure to optimize the results and to develop an in-depth fundamental physical and chemical understanding of the stabilization mechanism.

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D'Ambruoso, Gemma Delcina. "Site-Isolation, Intramolecular Energy Transfer, and Crosslinking in Synthetic Dendritic Quinacridones". Diss., Tucson, Arizona : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1135%5F1%5Fm.pdf&type=application/pdf.

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Pacella, Francesca. "Tuning the crosslinking chemistry for self-healable mucin hydrogel synthesis and application". Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-279301.

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Immune-orchestrating biomaterials that precisely modulate the immune reac-tion to the host could lead the way for improving the implantation outcomein the transplantation field, in comparison to passive biomaterials. The lab-oratory of Dr. Thomas Crouzier has shown hydrogels derived from mucinsare capable of orchestrating the immune response mediated by foreign bodyresponse (FBR), as a result of evading fibrosis. Further, a recent study fromhis group showed sialic acid on mucin hydrogels is essential for the immuno-logical activity of those materials. Mucin glycans transiently activated thendampened macrophages, important orchestrators for material-mediated FBR,in a sialic acid-dependent manner for the majority of cytokines followed. Thematerial properties such as rheological properties, self-healing capacity, andstability, can be governed by the crosslinking chemistry used and have a drasticimpact on the functionalities of the materials. In this project, various cross-linking strategies are applied to tune the hydrogel properties. We show thatthe robust cross-linking formed mucin hydrogels having a 1.5% (wt/v) bettersupported insulin-secreting cells form islet-like organoids, compared to 2.5%mucin hydrogels. We then investigate the self-healing properties of the newmucin hydrogels and their interactions with various cell systems.
Immunologiska biomaterial som specifikt modulerar en immunologisk reak-tion hos värden kan vara vägen till att förbättra resultatet av en transplantationi jämförelse med att använda passiva biomaterial. Inom laboratoriet lett av Dr.Thomas Crouzier har det kunnat påvisas att hydrogels erhållna från mucinerär kapabla till att förändra en immunlogisk respons, Foreign Body Respon-se (FBR) vilket resulterat i att kringgå fibrosis. Utöver detta har ytterligareen studie utförts av hans grupp vilken kunde påvisa att sialinsyra på mucinhydrogel är essentiellt för den immunologiska aktiviteten för dessa biomateri-al. Mucin glykaner aktiveras tillfälligt för att dämpa bildandet av makrofager,vilket är viktigt vid biomaterial FBR i ett sialinsyra-beroende för bildandet avmajoriteten av cytokiner. Materialegenskaperna såsom reologiska egenskaper,självläkande kapacitet, och stabilitet kan regleras genom en krosslänkad kemisom har en drastisk impakt för funktionen för biomaterialen. I detta projekt, ärflera krosslänkande strategier tillämpade för att förstå egenskaperna för hyd-rogelerna. Vi har kunnat påvisa att robusta krosslänkande system av mucinhydrogel bestående av 1.5% (wt/v) ger bättre support till insulin sekreterandeceller att bilda islet liknande organider, att jämföra med 2.5% mucin hydrogel.Vi undersöker sedan den självläkande egenskaperna av nya mucin hydrogeleroch deras interaktioner med ett flertal olika cellsystem.

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Fan, Chengkai. "A New Crosslinking Method of Isobutylene-isoprene Copolymer". University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1555686149937045.

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Xing, Liwen. "UV-Triggered and Thermo-Induced Crosslinking of Polymers Containing 1-Functionalized Benzocyclobutenes". University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1491396556917182.

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Savin, Rémy. "Catechol chemistry for biosensor manufacturing : synthesis and electro-crosslinking of gold nanoparticles/enzymes". Thesis, Strasbourg, 2022. http://www.theses.fr/2022STRAE008.

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L’intérêt pour les bioélectrodes croît exponentiellement depuis plusieurs dizaines d’années. En particulier, les biocapteurs et les biopiles enzymatiques ont montré des performances intéressantes pour la surveillance in-situ de biomarqueurs d’intérêts ou pour l’alimentation électrique de dispositifs miniaturisés bio-implantés. Malgré la multitude d’applications envisagées, ces dispositifs peinent encore à se généraliser sur le marché à cause de plusieurs limitations majeures. Le coût, la facilité de fabrication, la sensibilité et surtout la stabilité dans le temps sont des paramètres encore à améliorer. Etant des limitations intrinsèques au choix et à l’organisation des matériaux constituant la couche sensible, nous avons proposé par ce travail une nouvelle voie de fabrication des bioélectrodes. Nous avons utilisé un mélange de polyphénol, sel d’or, médiateur électrochimique et enzyme (relative au biomarqueur d’intérêt) qui a ensuite été électro-réticulés en complexes enzymes/nanoparticules organisés. Enfin, nous avons généralisé ce concept sur membrane souple avec co-immobilization du médiateur ce qui constitue une approche originale dans le développement de pansements intelligents pour le suivi des plaies chroniques
Interest in biosensors has grown exponentially in recent decades. In particular, enzymatic biosensors and biofuel cells have shown great promises as in-situ monitoring of interesting biomarkers or as miniaturized bio-implanted powering devices. Despite the multitude of applications, these devices are struggling to widespread on the market due to several limitations. Cost, ease of fabrication, sensitivity and stability over time are parameters that still deserve to be improved. The choice and spatial organization of the materials within the sensitive layer need to be reconsidered in order to propose new strategies for bioelectrodes manufacturing. In this work, a simple mixture of polyphenol, gold salt, electrochemical mediator and enzyme (related to the biomarker) were electro-crosslinked into an organized enzymes/nanoparticles film. Finally, this concept was transferred onto a flexible membrane with co-immobilization of the mediator. This original approach has enhanced to develop smart chronic wound dressings

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Libros sobre el tema "Crosslinking chemistry"

Güven, O. Crosslinking and Scission in Polymers. Dordrecht: Springer Netherlands, 1990.

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NATO Advanced Study Institute on "Advanced Methods of Determination of Crosslinking and Scission in Polymers and their Effects on Mechanical Properties" (1988 Kemer, Kemer Bucağı, Antalya İli, Turkey). Crosslinking and scission in polymers. Dordrecht: Kluwer Academic Publishers, 1990.

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Wong, Shan S. Chemistry of protein conjugation and cross-linking. Boca Raton: CRC Press, 1993.

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Ajit, Singh y Atomic Energy of Canada Limited., eds. Crosslinking of commercial polyethylenes by 10 MeV electrons. Pinawa, Man: AECL, Whiteshell Laboratories, 1995.

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1932-, Singh A. y Whiteshell Laboratories, eds. Crosslinking of commercial polyethylenes by 10 MeV electrons. Pinawa, Man: AECL Whiteshell Laboratories, 1995.

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1940-, Dickie R. A., Labana Santokh S. 1936-, Bauer Ronald S. 1932- y American Chemical Society. Division of Polymeric Materials: Science and Engineering., eds. Cross-linked polymers: Chemistry, properties, and applications. Washington, DC: American Chemical Society, 1988.

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Wong, Shan S. Chemistry of protein conjugation and cross-linking. Boca Raton: CRC Press, 1991.

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Wong, Shan S. Chemistry of protein and nucleic acid cross-linking and conjugation. 2^a ed. Boca Raton: Taylor & Francis, 2011.

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Protein Crosslinking: Biochemical and Molecular Aspects. Springer, 2012.

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Friedman, Mendel. Protein Crosslinking: Biochemical and Molecular Aspects. Springer London, Limited, 2012.

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Capítulos de libros sobre el tema "Crosslinking chemistry"

Penczek, Piotr, Piotr Czub y Jan Pielichowski. "Unsaturated Polyester Resins: Chemistry and Technology". En Crosslinking in Materials Science, 1–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/b136243.

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Teixeira, Roberto F. A., Xander K. D. Hillewaere, Stijn Billiet y Filip E. Du Prez. "Chemistry of Crosslinking Processes for Self-Healing Polymers". En Self-Healing Polymers, 215–46. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527670185.ch9.

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Deterding, Leesa J. y Kenneth B. Tomer. "Chemical Surface Modification and Chemical Crosslinking Combined with Mass Spectrometry for Protein Tertiary Structural Information". En NATO Science for Peace and Security Series A: Chemistry and Biology, 139–50. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-8811-7_10.

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"Crosslinking". En The Chemistry of Polymers, 64–76. 5^a ed. The Royal Society of Chemistry, 2017. http://dx.doi.org/10.1039/bk9781782628323-00064.

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Paul, Swaraj. "Crosslinking: Chemistry of Surface Coatings". En Comprehensive Polymer Science and Supplements, 149–92. Elsevier, 1989. http://dx.doi.org/10.1016/b978-0-08-096701-1.00186-5.

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"Theory of Tanning: the Concept of Link–Lock". En Tanning Chemistry: The Science of Leather, 583–97. 2^a ed. The Royal Society of Chemistry, 2019. http://dx.doi.org/10.1039/9781788012041-00583.

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Up to the beginning of the twenty-first century, the origin of hydrothermal increases in tanned collagen had not been explained and, in particular, the variation in outcome of different tanning chemistries and especially the apparently anomalous effect of chrome tanning had not been addressed. The phenomena had been glossed over, in favour of a vague concept of crosslinking, whereby the collagen triple helices were linked in a way that prevented them from breaking down in wet heat: this applied to all of the various fixation mechanisms. Here, it is argued that previous thinking was flawed, because it did not fit the facts. Now a theory is proposed that does fit all the facts and accounts for the variability in tanning outcomes, without exception. The link–lock mechanism is even simpler than the general view of crosslinking and allows the prediction of outcome from future tanning chemistries.

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"Chemical Degradation of Biological Drugs". En Organic Chemistry of Drug Degradation, 198–226. The Royal Society of Chemistry, 2012. http://dx.doi.org/10.1039/bk9781849734219-00198.

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Because the overwhelming majority of biological drugs are protein/peptide drugs, the main focus of this chapter is placed on the mechanisms of protein/peptide degradation, such as peptide bond hydrolysis, deamidation, side chain oxidation, disulfide bridge decomposition, β-elimination, and crosslinking, and so on. A few representative degradation mechanisms for carbohydrate- and nucleic acid-based biological drugs are also discussed.

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Arkenberg, Matthew R., Min Hee Kim y Chien-Chi Lin. "Click Hydrogels for Biomedical Applications". En Multicomponent Hydrogels, 155–91. The Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781837670055-00155.

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Hydrogels crosslinked by homopolymerization of single component acrylate/methacrylate terminated polymers (e.g., poly(ethylene glycol) diacrylate, or PEGDA) were once the dominant biomaterials in biomedical applications, including the encapsulation of therapeutic agents and biological molecules. However, accumulating evidence has revealed many disadvantages of homopolymerized hydrogels, including heterogeneity of the crosslinking that adversely impacted the bioactivity of the encapsulated molecules. As such, recent years have witnessed the expansive use of modular click chemistry for the crosslinking of multicomponent hydrogels, typically consisting of two or more functionally distinct macromolecular building blocks. This chapter provides an overview of the crosslinking and applications of multicomponent hydrogels, focusing on those crosslinked by strain-promoted alkyne–azide cycloaddition (SPAAC), Michael-type addition, Diels–Alder (DA) reactions, inverse electron-demand Diels–Alder (iEDDA), thiol–ene polymerizations, and imine/hydrazone/oxime click reactions. This chapter also summarizes information regarding the characteristics, advantages, and limitations of commonly used synthetic (e.g., PEG, poly(acrylate), poly(vinyl alcohol), etc.) and naturally-derived macromers (e.g., gelatin, hyaluronic acid, etc.) for forming multicomponent hydrogels. Finally, an overview is given on the applications of multicomponent hydrogels in drug delivery, biofabrication, and 3D/4D cell culture.

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Sinha, Lovely y Ujjwal Kumar. "Implications of DNA-acting Agents as Anticarcinogenic Potential in Breast Cancer Therapeutics". En Frontiers in Medicinal Chemistry, 262–80. BENTHAM SCIENCE PUBLISHERS, 2023. http://dx.doi.org/10.2174/9789815165043123100013.

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Breast cancer is the most prevalent neoplasm diagnosed in women worldwide. There are many factors responsible for breast cancer susceptibility. Mutation in tumor suppressor genes BRCA1 and BRCA2 predispose women to the early onset of breast cancer. The BRCA genes are involved in multiple cellular processes in response to DNA damage, including checkpoint activation, gene transcription, and DNA repair. Several DNA-acting agents act as effective anticancer used for treating cancer disease. Certain groups of chemicals are known to affect specific phases of cell division, such as, Cyclophosphamide is the most potent and successful anticancer agent that acts by alkylating the N-7position of guanine to cause crosslinking of DNA’s double helix, resulting in DNA breaks that interfere with the DNA replication and RNA transcription. This chapter deals with the classification of DNA-acting agents according to their modes of action.<br>

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Fu, M.-X., S. R. Thorpe y J. W. Baynes. "Effects of Aspirin on Glycation, Glycoxidation, and Crosslinking of Collagen". En Maillard Reactions in Chemistry, Food and Health, 95–100. Elsevier, 2005. http://dx.doi.org/10.1533/9781845698393.2.95.

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Actas de conferencias sobre el tema "Crosslinking chemistry"

Clark, P. E., M. Balakrishnan y L. Sundram. "Crosslinking of Hydroxypropyl Guar With Metal Ions". En SPE International Symposium on Oilfield Chemistry. Society of Petroleum Engineers, 1993. http://dx.doi.org/10.2118/25208-ms.

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Verga, Daniela, Florian Hamon, Florent Poyet, Sophie Bombard y Marie-Paule Teulade-Fichou. "Trapping quadruplexes with highly specific crosslinking agents". En XVIth Symposium on Chemistry of Nucleic Acid Components. Prague: Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 2014. http://dx.doi.org/10.1135/css201414193.

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Hu, Y. Thomas, Tejaswini Kishore, Jason Maxey y David Loveless. "Effects of Crosslinking Chemistry on Proppant Suspension in Guar Networks". En SPE International Symposium on Oilfield Chemistry. Society of Petroleum Engineers, 2015. http://dx.doi.org/10.2118/173726-ms.

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Kildeeva, Natalia R., Vasilii V. Nikonorov, Petr A. Perminov, Alexandra N. Zakharova y Sergey N. Mikhailov. "Periodate oxidized derivatives of nucleosides and nucleotides as novel crosslinking reagents". En XIVth Symposium on Chemistry of Nucleic Acid Components. Prague: Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 2008. http://dx.doi.org/10.1135/css200810407.

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Hurnaus, Thomas y Johann Plank. "Crosslinking of Guar and HPG Based Fracturing Fluids Using ZrO₂ Nanoparticles". En SPE International Symposium on Oilfield Chemistry. Society of Petroleum Engineers, 2015. http://dx.doi.org/10.2118/173778-ms.

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Djunaidi, M. Cholid, Arifatul Azizah y Gunawan. "Synthesis of molecularly imprinted polymer urea based on polyeugenol with ethylene glycol dimethacrylate as crosslinking agent". En THE 14TH JOINT CONFERENCE ON CHEMISTRY 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0005544.

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Nickelsen, Anna y Joachim Jose. "Photo-crosslinking of human protein kinase regulatory subunit CK2β for the identification of CK2 binding partners". En 5th International Electronic Conference on Medicinal Chemistry. Basel, Switzerland: MDPI, 2019. http://dx.doi.org/10.3390/ecmc2019-06334.

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Zakharova, Alexandra N., Valentin V. Novikov, Petr A. Perminov, Natalia R. Kildeeva y Sergey N. Mikhailov. "Dialdehyde derivatives of nucleosides and nucleotides as novel crosslinking reagents and their comparison with glutaraldehyde". En XVth Symposium on Chemistry of Nucleic Acid Components. Prague: Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, 2011. http://dx.doi.org/10.1135/css201112254.

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Savana, Raisza y Dina Kartika Maharani. "Usage Of Chitosan-Silica with Crosslinking Agent As A Matrix For Slow Release Fertilizer". En Seminar Nasional Kimia - National Seminar on Chemistry (SNK 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/snk-18.2018.16.

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Yue, Zhiwei David, Andrew Slocum, Xiaohong Lucy Tian, Linping Ke, Megan Westerman y John Hazlewood. "An Integrated Scale Protection Package for Offshore Fractured Wells Under Designed Shut-In Extension". En SPE International Conference on Oilfield Chemistry. SPE, 2021. http://dx.doi.org/10.2118/204363-ms.

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Abstract After fracturing, it is common practice to leave offshore wells shut-in from days to weeks for operational purposes. During the recent historic decline of demand for global crude, a trend has been witnessed to shut in even newly fractured wells under design for an extended period. The cause of these extended shut-ins can be attributed to various factors including operational logistics as well as economic factors. The shut-in extension brings some unique scaling challenges for well designs. In this paper, an integrated scale inhibitor (SI)/fracturing fluid package is presented with detailed laboratory prerequisites data to validate its efficacy for long-term scale protection during the extended shut-in. Utilizing seawater in offshore fracturing can provide significant cost savings to an operation. Unfortunately, in regions with barium-rich formations, the use of seawater brings tremendous barite scaling risk. In order to solve this challenge, the investigation focused on the selection of the most effective inhibitors for long-term barite inhibition under the simulated reservoir conditions. Along with the scale inhibitor selection, the crosslinked gel had to be carefully optimized to eliminate any potential negative interference the gel additives could impart to the performance of the inhibitor. Furthermore, the inhibitor was tested in the crosslinking system to meet optimum rheology requirements. Utilizing the broken gel containing the designed inhibitor package, barite precipitation could be prevented for months under the simulated testing conditions. Due to high levels of sulfate from seawater and the barium originating from the formation, barite scale formed immediately upon mixing of the two types of water in absence of the appropriate scale inhibitors. Solid scale products featuring slow releasing of the inhibitor ingredients was proven insufficient for this application. With extensive laboratory screening, the candidate chemistry demonstrated great brine-calcium tolerance, superior scale inhibition performance for both sulfate and carbonate scales, and the minimum interferences for the crosslinking engineering to meet necessary proppant carrying capacity. To mimic the gel-breaking process and heterogeneous bleeding from the formation water, the inhibitor was crosslinked with the gel at various loading rates (1 gpt to 10 gpt) and broken at the elevated reservoir temperature, then mixed with the different ratios of the formation water. Reliable scale inhibition performance was achieved for an extended period of time for up to six weeks. Incorporating SI into the fracturing stimulation package is a convenient method for operators to include a scale-control program into well-defined fracturing designs with minimal adjustment and also add significant cost-saving for offshore logistics and rig time (Fitzgerald, et al., 2008). The scale inhibitor product presented in this paper shows a superior solution to protect assets from scale deposition for an extended shut-in period.

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