Relevant bibliographies by topics / Nanogels

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Nanogels'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 June 2025

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Journal articles on the topic "Nanogels"

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Quan, Chang-Yun, Hua Wei, Yun-Xia Sun, et al. "Polyethyleneimine Modified Biocompatible Poly(N-isopropylacrylamide)-Based Nanogels for Drug Delivery." Journal of Nanoscience and Nanotechnology 8, no. 5 (2008): 2377–84. http://dx.doi.org/10.1166/jnn.2008.236.

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A series of biocompatible and stimuli-sensitive poly(N-isopropylacrylamide-co-propyl acrylic acid) (P(NIPAAm-co-PAAc)) nanogels were synthesized by emulsion polymerization. In addition, polyethyleneimine (PEI) was further grafted to modify the PNIPAAm-based nanogels. The P(NIPAAm-co-PAAc)-g-PEI nanogels exhibited good thermosensitivity as well as pH sensitivity. Transmission electron microscopy (TEM) showed that the P(NIPAAm-co-PAAc)-g-PEI and P(NIPAAm-co-PAAc) nanogels displayed well dispersed spherical morphology. The mean sizes of the nanogels measured by dynamic light scattering (DLS) were from 100 nm to 500 nm at different temperatures. The cytotoxicity study indicated P(NIPAAm-co-PAAc) nanogels exhibited a better biocompatibility than both PNIPAAm nanogel and P(NIPAAm-co-PAAc)-g-PEI nanogel although all the three kinds of nanogels did not exhibit apparent cytotoxicity. The drug-loaded nanogels, especially the PEI-grafted nanogels, showed temperature-trigged controlled release behaviors, indicating the potential applications as an intelligent drug delivery system.
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Srivastava, Saloni, Supriyo Saha, and Vikash Jakhmola. "Nanogel: Types, Methods of Preparation, Limitation, Evaluation and Application – A Systematic Review." INTERNATIONAL JOURNAL OF DRUG DELIVERY TECHNOLOGY 13, no. 04 (2023): 1631–39. http://dx.doi.org/10.25258/ijddt.13.4.77.

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Nanogels combine the characteristics of nanomaterials with hydrogels. To meet the expanding demands from various areas, a sizable number of nanogels have been designed and manufactured using the emulsion solvent diffusion nano precipitated method, emulsion evaporation of the solvent method, reverse micellar method and modified diffusion emulsification method. Thermosensitive nanogel, pH-sensitive nanogel, ultrasound-sensitive magnetic response, response to multiple stimuli, chain transfer polymerization, photo-induced crosslinking polymerization and modifications for active targeting are the types of nanogels based on response towards stimuli and polysaccharide, chitosan, pullulan, hyaluronic acid, alginate, cyclodextrin, gum acacia, protein are used to prepare nanogel. Nanogels have considerable potential and novelty within the biomedical sector due to their uniformity, adjustable dimensions, little toxicity, resilience in the presence of serum, and capacity for responsive behavior with a comparatively high drug encapsulation capacity. Nanogels have considerable potential in bioactive substance delivery, organ targeting, and chemotherapy. The article highlighted the preparation, types, evaluation and applicability of nanogel as a targeted delivery system.
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Niezabitowska, Edyta, Dominic M. Gray, Eduardo Gallardo-Toledo, Andrew Owen, Steve P. Rannard, and Tom O. McDonald. "Understanding the Degradation of Core-Shell Nanogels Using Asymmetrical Flow Field Flow Fractionation." Journal of Functional Biomaterials 14, no. 7 (2023): 346. http://dx.doi.org/10.3390/jfb14070346.

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Nanogels are candidates for biomedical applications, and core-shell nanogels offer the potential to tune thermoresponsive behaviour with the capacity for extensive degradation. These properties were achieved by the combination of a core of poly(N-isopropylmethacrylamide) and a shell of poly(N-isopropylacrylamide), both crosslinked with the degradable crosslinker N,N’-bis(acryloyl)cystamine. In this work, the degradation behaviour of these nanogels was characterised using asymmetric flow field flow fractionation coupled with multi-angle and dynamic light scattering. By monitoring the degradation products of the nanogels in real-time, it was possible to identify three distinct stages of degradation: nanogel swelling, nanogel fragmentation, and nanogel fragment degradation. The results indicate that the core-shell nanogels degrade slower than their non-core-shell counterparts, possibly due to a higher degree of self-crosslinking reactions occurring in the shell. The majority of the degradation products had molecule weights below 10 kDa, which suggests that they may be cleared through the kidneys. This study provides important insights into the design and characterisation of degradable nanogels for biomedical applications, highlighting the need for accurate characterisation techniques to measure the potential biological impact of nanogel degradation products.
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Tran, Phuong H. L., Wei Duan, Beom-Jin Lee, and Thao T. D. Tran. "Nanogels for Skin Cancer Therapy via Transdermal Delivery: Current Designs." Current Drug Metabolism 20, no. 7 (2019): 575–82. http://dx.doi.org/10.2174/1389200220666190618100030.

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Background: Recently, several strategies have been proposed for skin cancer therapy by transdermal delivery, and particularly the use of nanotechnology. Methods: This process disrupts the stratum corneum to deliver a drug through the skin, allowing it to accumulate at the tumor site. Results: Nanogels are drug delivery systems that can be applied to many diseases. Nanogel engineering has been widely studied for use in drug delivery, particularly in cancer theranostics. This review summarizes specific strategies for using nanogels to treat skin cancer, a topic that is limited in recent literature. Conclusion: Advanced techniques for effective skin cancer therapy based on the nanogel’s penetration and cellular uptake abilities will be discussed. Moreover, techniques for penetrating the skin, as well as drug release, permeation studies, and microscopic observations, will also be discussed.
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Kumar, Manish, and Hemant K. Sharma. "FORMULATION AND EVALUATION OF DOXORUBICIN CONTAINING NANOGELS FOR DELIVERY TO CANCER CELLS." Journal of Drug Delivery and Therapeutics 8, no. 5 (2018): 178–83. http://dx.doi.org/10.22270/jddt.v8i5.1890.

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The objective of this study is to prepare nanogels were prepared via charged gellan gum. It was prepared by in situ cross linking reaction between two oppositely charged materials by green method without use of chemical cross linking agents. The prepared nanogels were characterized by Dynamic light scattering, scanning electron microscopy, differential scanning calorimetry and X- Ray diffractometry. The prepared formulation had average particle size of 226 nm with polydispersity index of 0.3. The doxorubicin loaded nanogel demonstrated sustained release for 20 h. The prepared nanogels were hemocompatible and cyctocompatible as revealed by hemocompatibility and MTT assay respectively. All results confirmed that these nanogels can be used for cancer treatment.
 Keywords: Nanogel, Chitosan, Gellan gum, Doxorubicin, Cancer.
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Nickel, Anne C., Alan R. Denton, Judith E. Houston, et al. "Beyond simple self-healing: How anisotropic nanogels adapt their shape to their environment." Journal of Chemical Physics 157, no. 19 (2022): 194901. http://dx.doi.org/10.1063/5.0119527.

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The response of soft colloids to crowding depends sensitively on the particles’ compressibility. Nanogel suspensions provide model systems that are often studied to better understand the properties of soft materials and complex fluids from the formation of colloidal crystals to the flow of viruses, blood, or platelet cells in the body. Large spherical nanogels, when embedded in a matrix of smaller nanogels, have the unique ability to spontaneously deswell to match their size to that of the nanogel composing the matrix. In contrast to hard colloids, this self-healing mechanism allows for crystal formation without giving rise to point defects or dislocations. Here, we show that anisotropic ellipsoidal nanogels adapt both their size and their shape depending on the nature of the particles composing the matrix in which they are embedded. Using small-angle neutron scattering with contrast variation, we show that ellipsoidal nanogels become spherical when embedded in a matrix of spherical nanogels. In contrast, the anisotropy of the ellipsoid is enhanced when they are embedded in a matrix of anisotropic nanogels. Our experimental data are supported by Monte Carlo simulations that reproduce the trend of decreasing aspect ratio of ellipsoidal nanogels with increasing crowding by a matrix of spherical nanogels.
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Harsányi, Anna, Attila Kardos, Pinchu Xavier, Richard A. Campbell, and Imre Varga. "A Novel Approach for the Synthesis of Responsive Core–Shell Nanogels with a Poly(N-Isopropylacrylamide) Core and a Controlled Polyamine Shell." Polymers 16, no. 18 (2024): 2584. http://dx.doi.org/10.3390/polym16182584.

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Microgel particles can play a key role, e.g., in drug delivery systems, tissue engineering, advanced (bio)sensors or (bio)catalysis. Amine-functionalized microgels are particularly interesting in many applications since they can provide pH responsiveness, chemical functionalities for, e.g., bioconjugation, unique binding characteristics for pollutants and interactions with cell surfaces. Since the incorporation of amine functionalities in controlled amounts with predefined architectures is still a challenge, here, we present a novel method for the synthesis of responsive core–shell nanogels (dh < 100 nm) with a poly(N-isopropylacrylamide) (pNIPAm) core and a polyamine shell. To achieve this goal, a surface-functionalized pNIPAm nanogel was first prepared in a semi-batch precipitation polymerization reaction. Surface functionalization was achieved by adding acrylic acid to the reaction mixture in the final stage of the precipitation polymerization. Under these conditions, the carboxyl functionalities were confined to the outer shell of the nanogel particles, preserving the core’s temperature-responsive behavior and providing reactive functionalities on the nanogel surface. The polyamine shell was prepared by the chemical coupling of polyethyleneimine to the nanogel’s carboxyl functionalities using a water-soluble carbodiimide (EDC) to facilitate the coupling reaction. The efficiency of the coupling was assessed by varying the EDC concentration and reaction temperature. The molecular weight of PEI was also varied in a wide range (Mw = 0.6 to 750 kDa), and we found that it had a profound effect on how many polyamine repeat units could be immobilized in the nanogel shell. The swelling and the electrophoretic mobility of the prepared core–shell nanogels were also studied as a function of pH and temperature, demonstrating the successful formation of the polyamine shell on the nanogel core and its effect on the nanogel characteristics. This study provides a general framework for the controlled synthesis of core–shell nanogels with tunable surface properties, which can be applied in many potential applications.
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Adamo, Giorgia, Natascia Grimaldi, Maria Antonietta Sabatino, Marta Walo, Clelia Dispenza, and Giulio Ghersi. "E-beam crosslinked nanogels conjugated with monoclonal antibodies in targeting strategies." Biological Chemistry 398, no. 2 (2017): 277–87. http://dx.doi.org/10.1515/hsz-2016-0255.

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Abstract Poly(N-vinyl pyrrolidone)-based-nanogels (NGs), produced by e-beam irradiation, are conjugated with monoclonal antibodies (mAb) for active targeting purposes. The uptake of immuno-functionalized nanogels is tested in an endothelial cell line, ECV304, using confocal and epifluorescence microscopy. Intracellular localization studies reveal a faster uptake of the immuno-nanogel conjugate with respect to the ‘bare’ nanogel. The specific internalization pathway of these immuno-nanogels is clarified by selective endocytosis inhibition experiments, flow cytometry and confocal microscopy. Active targeting ability is also verified by conjugating a monoclonal antibody which recognizes the αvβ3 integrin on activated endothelial cells. Epifluorescence images of the ‘wound healing assay’ on ECV304 cells provide evidence of nanogels localization only in the target cells. Therefore, the immuno-nanogels produced have the potential to recognize specific cell types in heterogeneous systems, which makes them promising candidates for targeted drug delivery applications.
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Šálek, Petr, Jana Dvořáková, Sviatoslav Hladysh, et al. "Stimuli-responsive polypeptide nanogels for trypsin inhibition." Beilstein Journal of Nanotechnology 13 (June 22, 2022): 538–48. http://dx.doi.org/10.3762/bjnano.13.45.

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A new type of hydrophilic, biocompatible, and biodegradable polypeptide nanogel depots loaded with the natural serine protease inhibitor α1-antitrypsin (AAT) was applied for the inhibition of the inflammatory mediator trypsin. Two types of nanogels were prepared from linear synthetic polypeptides based on biocompatible and biodegradable poly[N5-(2-hydroxyethyl)-ʟ-glutamine-ran-N5-propargyl-ʟ-glutamine-ran-N5-(6-aminohexyl)-ʟ-glutamine]-ran-N5-[2-(4-hydroxyphenyl)ethyl)-ʟ-glutamine] (PHEG-Tyr) or biocompatible Nα-ʟ-lysine-grafted α,β-poly[(2-propyne)-ᴅ,ʟ-aspartamide-ran-(2-hydroxyethyl)-ᴅʟ-aspartamide-ran-(2-(4-hydroxyphenyl)ethyl)-ᴅʟ-aspartamide] (Nα-Lys-NG). Both nanogels were prepared by HRP/H2O2-mediated crosslinking in inverse miniemulsions with pH and temperature-stimuli responsive behavior confirmed by dynamic light scattering and zeta potential measurements. The loading capacity of PHEG-Tyr and Nα-Lys-NG nanogels and their release profiles were first optimized with bovine serum albumin. The nanogels were then used for loading and release of AAT. PHEG-Tyr and Nα-Lys-NG nanogels showed different loading capacities for AAT with the maximum (20%) achieved with Nα-Lys-NG nanogel. In both cases, the nanogel depots demonstrated a burst release of AAT during the first 6 h, which could be favorable for quick inhibition of trypsin. A consequent pilot in vitro inhibition study revealed that both PHEG-Tyr and Nα-Lys-NG nanogels loaded with AAT successfully inhibited the enzymatic activity of trypsin. Furthermore, the inhibitory efficiency of the AAT-loaded nanogels was higher than that of only AAT. Interestingly, also non-loaded PHEG-Tyr and Nα-Lys-NG nanogels were shown to effectively inhibit trypsin because they contain suitable amino acids in their structures that effectively block the active site of trypsin.
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Shailesh D Ghaywat, Pooja S Mate, Yogesh M Parsutkar, Ashwini D Chandimeshram, and Milind J Umekar. "Overview of nanogel and its applications." GSC Biological and Pharmaceutical Sciences 16, no. 1 (2021): 040–61. http://dx.doi.org/10.30574/gscbps.2021.16.1.0196.

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Nanogel have emerged as a versatile drug delivery system for encapsulation of guest molecules. A nanoparticle which is composed of hydrophilic polymer network known as Nanogel having range from 100-200nm. Nanogel have swellable and degradation properties with high drug loading capacity, high stability, sustained and targetable manner, large surface area. Therefore, nanogel are more productive than conventional and micro-sized delivery. In recent year in the field of biotechnology nanogel were prominently used to deal with genetics, enzyme immobilization and protein synthesis. Moreover, it has productive asset for the development of novel therapeutic system in medicine. These are soft materials capable of holding small molecular biomacromolecules, therapeutics, and inorganic nanoparticles within their crosslinked networks, which allows them to find applications for therapy as well as imaging of a variety of disease conditions. These properties not only enhance the functionality of the carrier system but also help in overcoming many challenges associated with the delivery of cargo molecules. This review aims to highlight the distinct and unique capabilities of nanogels as carrier system, Synthesis of nanogels, Types of Physical and chemical crosslinked nanogels, Stimuli responsive behavior, In vivo behavior, Therapeutic drug carrier, marketed formulation of Nanogels and the last part of review summarizes the applications of nanogels in various diseases. Transdermal drug delivery, diabetes, anti-inflammatory, vaginal drug delivery, neurodegenerative diseases, ocular dieses, autoimmune disease, and anticancer treatment for specially targeting the cancer cells, thereby reducing uptake into healthy cells. This nanogel drug delivery is a phenomenal system, and further depth study is required to explore their interaction at cellular and molecular levels and minimize the challenges.
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Dissertations / Theses on the topic "Nanogels"

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Lee, Jin Cho Moo J. "Polymeric nanogels as gene carriers." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2007. http://dc.lib.unc.edu/u?/etd,1239.

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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2007.<br>Title from electronic title page (viewed Mar. 26, 2008). "... in partial fulfillment of the requirement for the degree of Doctor of Philosophy in the Division of Molecular Pharmaceutics at the School of Pharmacy." Discipline: Molecular pharmaceutics; Department/School: Pharmacy.
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Liu, Chao. "Multilayer Based Nanogels and Bio-lubricants." Doctoral thesis, KTH, Yt- och korrosionsvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-140688.

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Surface chemistry plays an important role in numerous technological innovations, and gives the ability to modify and control surface and interface properties. Layer-by-Layer (LbL) self-assembly is a simple concept that can provide a route to versatile combination of materials as well as fine control of film thickness, hydrophobicity, thermal, optical and electrical properties. This methodology has thus received attention from both academic and industrial experts. A large variety of polymers, proteins and nanoparticles can be utilized in the LbL process. In my PhD-thesis work I made use of the LbL technique to build surface grafted nanogels and bio-lubricant films. Various surface sensitive techniques have been applied in this PhD thesis work. The three main methods were quartz crystal microbalance with dissipation (QCM-D), total internal reflection Raman (TIR-Raman) spectroscopy, and atomic force microscopy (AFM). In lieu of conventional methods such as reflectometry or ellipsometry, we have combined data obtained from QCM-D and TIR-Raman to gain information on wet and dry LbL films as well as their water content. The relatively new AFM imaging mode known as PeakForce QNM was used to investigate topographical and nano-mechanical properties of LbL films. The colloidal probe technique was implemented with AFM for normal and lateral force measurements. It is becoming increasingly clear that biopolymers are important for a sustainable society since they are renewable, have useful properties and often are environmentally benign. One main part in this thesis work was to fabricate thin chitosan (CHI) nanogels covalently attached to solid surfaces. This was achieved by first assembling a chitosan/poly(acrylic acid) multilayer using silane chemistry and the LbL method. Next, the chitosan molecules were selectively cross-linked in the film, and finally poly(acrylic acid) was (partly) rinsed out of the nanogel. The final composition and the responsiveness of the nanogel to pH and ionic strength changes were found to depend on the cross-linking density. Statistical analysis, known as target factor analysis, was used to analyze TIR Raman spectra and draw conclusions about e.g. the composition of multilayers during the build-up process, and the kinetics of cross-linking of chitosan. The other main part in this thesis work also utilized the LbL methodology, but here the main goal was to gain understanding on the unprecedented lubrication of synovial joints. It is in general terms due to a sophisticated hierarchical structure of cartilage combined with synergistic actions of surface-active components present in the synovial fluid, but many aspects of this fascinating biotribological system remain poorly understood. I focused on the lubricating ability of synovial fluid components, and in particular on the association of two components of the synovial fluid, hyaluronan and dipalmitoyl phosphatidyl choline (DPPC), in bulk solution and at interfaces. We found that hyaluronan associated with DPPC vesicles in bulk and adsorbed to supported DPPC bilayers, and that the LbL method could be utilized for forming composite layers of these two components. These composite layers had very favorable lubrication properties, with a low friction coefficient as low as 0.01, and they were also sufficiently stable to shear and load up to the pressure that broke healthy cartilage.<br><p>QC 20140130</p>
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Messager, Léa. "Nanogels de polysaccharides pour la délivrance d’insuline." Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14690/document.

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Les nanogels sont de bons candidats pour la délivrance d’actifs. Ces réseaux de polymères réticulés et de taille nanométrique, sont gonflés d’eau. Ils sont donc capables d’encapsuler une protéine à l’intérieur de leurs pores et de la libérer en fonction de l’état de gonflement du réseau. Cet état peut être modulé par la densité de réticulation du réseau ou par l’application d’un stimulus externe tel que le pH, la température ou encore une biomolécule telle que le glucose. Ainsi, les nanogels sensibles au glucose se présentent comme des candidats idéaux pour administrer l’insuline de façon asservie à la glycémie. Afin de satisfaire aux critères de biocompatibilité et de biorésorption des vecteurs, nous avons choisi de développer des nanogels à base de polysaccharide, en particulier à base d’acide hyaluronique (HA). Ceux-ci sont obtenus par réticulation du HA, préalablement modifié par des fonctions réticulables telles que les méthacrylates, dans des nanogouttes d'émulsion eau-dans-huile. Des nanogels de taille et de porosité modulables ont été synthétisés grâce à un bon contrôle 1) de la modification chimique des précurseurs par des fonctions réticulables (taux de méthacrylation), 2) de l’émulsion matricielle (taille, stabilité), 3) des conditions de réticulation par photopolymérisation gouvernant le taux de conversion des méthacrylates. Ce savoir-faire a ensuite été appliqué à la synthèse de nanogels modifiés par des dérivés de l’acide phénylboronique, ligand du glucose, afin d’obtenir des matériaux dont le taux de gonflement varie en fonction de la glycémie. L’intérêt applicatif de ces objets a été évalué vis-à-vis des propriétés d’encapsulation de l’insuline, de dégradabilité enzymatique, et de biocompatibilité<br>Nanogels are an attractive class of delivery systems. These soft particles, made of highly swollen polymer network, can physically entrap a drug and release it at a rate depending on its diffusion though the network. Therefore, any change in the swelling degree can trigger the release kinetics. This parameter can be tuned by modifying the density of cross-links in the gel matrix or by changing the environmental conditions such as pH, temperature or analyte such as glucose. Thus, glucose-responsive nanogels are good candidates to be used as self-regulated systems for insulin delivery. To fulfill both biocompatibility and biodegradability criteria, our attention has been focused on the design of new nanogels made of polysaccharides, in particular made of hyaluronic acid (HA), as a main constituent. HA was at first covalently modified with polymerizable methacrylate functions and confined in nanoreactors during photopolymerization using water-in-oil miniemulsions as template. Biodegradable nanogels with a well-defined size and various cross-linking degrees were thus achieved, thanks to a good control of 1) the chemical modification of HA with methacrylates (degree of methacrylation) 2) the emulsion template (size, stability), 3) the photopolymerization conditions which governed the conversion rate of the polymerization. Further modification of the polysaccharide with phenylboronic acid as a glucose-sensitive group yielded nanogels whose swelling behavior could vary as a function of glucose concentration. These systems were further studied as insulin delivery systems. Moreover, their biodegradability, stability and biocompatibility were assessed
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Rippe, Marlène. "Systèmes transporteurs de principes actifs hydrophobes à base de glycoaminoglycanes thermosensibles : vers une plateforme polyvalente de délivrance." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAV004/document.

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Dans le domaine des systèmes d’administration de principes actifs, les nanovecteurs formés par auto-association en milieu aqueux de polymères biocompatibles amphiphiles sont apparus comme l’un des systèmes transporteurs de principes actifs (PA) hydrophobes les plus prometteurs. Ces systèmes offrent plusieurs avantages tels qu'une meilleure solubilité du PA hydrophobe dans l'eau, une diminution des effets secondaires et une amélioration de la libération dans les tissus tumoraux grâce à l’effet de perméabilité et de rétention tissulaire (effet EPR). À cet égard, les nanogels sensibles aux stimuli sont des plateformes attrayantes pour l'administration de médicaments en raison de leur capacité à modifier leurs propriétés physiques et/ou chimiques en réponse à un stimulus externe tel que la lumière, l’application d’un champ magnétique, une variation de pH ou de température. Les polymères thermosensibles sont particulièrement intéressants en raison de leur capacité à subir une transition de phase réversible sans avoir besoin de réactifs supplémentaires. Dans ce contexte, nous avons développé et étudié une nouvelle classe de nanogels thermosensibles, biocompatibles et biodégradables à base de glycoaminoglycanes (GAGs) en modifiant le squelette polysaccharidique avec un copolymère thermoresensible de méthacrylate de di(éthylène glycol) et de n-butylméthacrylate. Celui-ci a été conçu pour obtenir des nanogels stables à température ambiante. La voie de synthèse polyvalente a également permis la réticulation de la couronne afin de figer leur structure. Le choix des GAGs, composant la couronne hydrophile peut être exploité pour contrôler leur comportement biologique. Dans l’objectif d’utiliser ces systèmes en tant que plate-forme polyvalente pour la délivrance de principes actifs et d’autres molécules d'intérêt, nous avons étudié la possibilité d’incorporer des nanoparticules d'oxyde de fer pour des applications de guidage magnétique, d’imagerie et de traitement par hyperthermie. Les synthèses du composant magnétique ainsi que la conception du nanovecteur sont des étapes clés pour réaliser un système de délivrance magnétique capable de réaliser un ciblage efficace<br>In the field of drug delivery systems, polymeric nanogels obtained by the self-assembly of biocompatible amphiphilic polymers in water have emerged as one of the most promising nanocarriers for various hydrophobic drugs. These systems offer several advantages such as enhanced hydrophobic drug solubility in water, decreased side effects, and improved drug delivery to tumor tissues via the enhanced permeability and retention (EPR) effect. In this regard, stimuli-responsive polymeric nanogels are attractive platforms for drug delivery due to their ability to change their physical and/or chemical properties in response to an external stimulus such as light, magnetic field, pH or temperature. Thermoresponsive polymers are particularly interesting due to their ability to undergo a reversible thermally-induced phase transition without the need of additional reagents. In this context, our aim was to engineer and to study a new class of thermoresponsive, biocompatible and biodegradable nanogels based on glycoaminoglycans (GAGs) through the modification of the polysaccharide backbone with a thermoresponsive copolymer of di(ethylene glycol) methacrylate (DEGMA) and n-butylmethacrylate (BMA)). The latter was properly designed to obtain stable nanogels at room temperature. The versatile synthetic route to nanogels also allowed their further shell-crosslinking to capture the nanogel structure at low temperature. The choice of the GAGs forming the hydrophilic shell can be exploited to control their biological behavior. In order to use these systems as a versatile platform for delivery of active ingredients and other molecules of interest, we investigated the possibility of incorporating iron oxide nanoparticles for magnetic guidance, imaging and hyperthermia treatment. The syntheses of the magnetic component as well as the design of the nanocarrier are key steps to achieve a magnetically-responsive nanodelivery system capable of efficient targeting
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Muratalin, Marat. "Stimuli-responsive nanogels for environmental and pharmaceutical applications." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/10190.

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The term microgel has been widely used to describe particles that swell but do not dissolve in a solvent. Traditionally they can be anything from 100 nm – 100 μm in size. This project is devoted principally to investigation of the swelling/deswelling properties of largely submicron poly(N-isopropylacrylamide) [PNIPAM] microgel particles and its derivatives and also poly(2-vinylpyridine) [PVP] microgel particles. PNIPAM microgel particles are temperature-responsive because of the hydrophobic isopropyl group and the hydrophilic amide group present in its side chains. PVP microgel particles are pH-responsive due to the pyridine groups. Surfactant free emulsion polymerization (SFEP) and emulsion polymerization techniques were employed in order to copolymerize PNIPAM with acrylic acid (AA), with 3-acrylamidophenylboronic acid (3-APB) and (3-acrylamidopropyl)trimethylammonium bromide (ATMA) and with 1-vinylimidazole (VI). The resultant microgel particles exhibited multi-responsive behaviour being sensitive to changes in temperature, pH and the PNIPAM-co-3-APB-ATMA microgels were sensitive to concentration of glucose, whilst the PNIPAM-co-VI microgels were sensitive to certain metals, copper in particular. These microgel particles were characterized using dynamic light scattering (DLS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The behaviour of the particles under various conditions of temperature, pH, glucose and metal ion are described and discussed in this work and several observations, such as swelling/deswelling transitions of PNIPAM-co-VI and PNIPAM-co-3-APB-ATMA with increase of concentration of added copper (II) and glucose respectively, were reported for the first time. The microgel containing AA exhibit characteristic temperature-sensitive behaviour with volume phase transition temperature (VPTT) being in the range of 35o-40oC and showed pH-sensitive features as the particles collapsed at low and swelled at high pHs. The PNIPAM-co-VI microgels undergo swelling before the concentration of Cu2+ reaches 0.3 g/L due to adsorption of the cations inside the particle which leads to charging up the internal phase of the microgel. Hence, the repulsion forces of positively charged Cu (II) ions are dominating over contraction forces of complex binding. However, at higher concentrations of copper (II) ions the binding forces of complexation between Cu2+ and imidazole groups of the microgels are leading to conformation of the microgel backbone, and hence weaker polymer-solvent interactions. Therefore, it is favourable that solvent would be forced out of the particle resulting into the collapse. In addition, the copper (II) uptake was calculated and the uptake was found to be well described by the Langmuir adsorption isotherm. The impact of other metal ions, such as nickel, zinc, iron and silver, was also investigated. The microgels swelled upon addition low concentrations of corresponding metal ions, however aggregation has been observed at higher concentrations. The microgels containing various concentration of VI were also examined on sensitivity to the temperature and pH changes. The investigation of such microgels with increasing temperature showed similar behaviour to those containing AA as the microgel particles shrunk continuously and the LCST has been shifted to higher temperatures (in the range of 35o-45oC). The particle size of these microgels was also investigated as a function of pH; the microgel particles swelled at low and collapsed at high pHs. The particle size of the PNIPAM-co-3-APB-ATMA microgels was investigated both as a function of temperature and glucose concentration. The microgels showed typical behaviour of the PNIPAM microgels copolymerized with functional monomer, which were 3-APB and ATMA, by continuous shrinking with increasing temperature and shifted LCST towards higher temperatures. Additionally, these microgels showed swelling behaviour with the increase of glucose concentration at physiological conditions, i.e. particles swelled in the range of glucose concentration between 0.1 and 10 mmol/L at 35oC and pH 7.5. The behaviour of these microgels was also investigated at 35oC and pH 8.5 as a function of glucose concentration. Although the swelling of the particles was slightly larger at pH 8.5, considerable swelling was also observed at pH 7.5 making them the first microgel system to be glucose sensitive at physiological pH and temperature.
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Shi, Aibin. "Synthesis and bioactivities of substituted quinolines and nanogels." Diss., Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/1638.

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Oehrl, Alexander [Verfasser]. "Polyglycerin-Based Nanogels for Protein Encapsulation / Alexander Oehrl." Berlin : Freie Universität Berlin, 2020. http://d-nb.info/1214641296/34.

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Weiss-Maurin, Mathilde. "Synthèse de nanogels à base de poly(liquides ioniques), par copolymérisation radicalaire réticulante contrôlée par le cobalt, pour des applications de revêtement." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0152/document.

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La synthèse de nanogels par voie directe est étudiée par la copolymérisationradicalaire réticulante contrôlée par le cobalt (CMRCcP) d’un monomère monovinylique et d’unréticulant divinylique. La synthèse de nanogels globulaires a été réalisée en utilisant unsystème de co-monomères soit neutres (acétate de vinyle et adiapte de divinyle) soit liquidesioniques. Le contrôle de la polymérisation est vérifié dans tous les cas, les liaisons C-Cosituées aux extrémités des chaînes polymères ont été réactivées, afin de former des nanogelsde « seconde-génération ». Dans le cas de monomères liquides ioniques, différents contreanionsont été utilisés afin de jouer sur l’hydrophilie des co-monomères : la CMRCcP dubromure de N-vinyl-3-ethyl imidazolium (VEtImBr) et du bromure de 1,13-divinyl-3-decyldiimidazolium (DVImBr) a été réalisée dans l’eau, à 30 °C, pour former des nanogelspoly(VEtImbr-co-DVImBr) hydrophiles. Les propriétés antibactériennes de ces nanogels ontété étudiées.Les pendants hydrophobes de ces nanogels à base de PILs ont été synthétisés via laCMRCcP directe, dans l’acétate d’éthyle, de co-monomères contenant des contre-anionsbis(trifluromethanesulfonyl)imide (NTf2-). La capacité à former des surfaces poreusesordonnées de ces nanogels hydrophobes poly(VEtImNTf2-co-DVImNTf2) a été examinée, ainsique leur conductivité ioniques en films minces.Des copolymérisations ‘mixtes’ ont également été étudiées, dans l’optique de formerdifférentes architectures nanogels en utilisant des co-monomères ayant des réactivités trèsdifférentes<br>The syntheses of globular nanogels were first investigated under mild conditions,using a mono- and a divinyl co-monomer with similar reactivities. CMRCcP was implementedon either neutral (vinyl acetate (VAc) and divinyl adipate (DVA)) co-monomers, or ionic liquidco-monomers. Control over each polymerization was ascertained, and dormant cobaltcarbonchain-ends could be re-activated to form “second-generation” nanogels. CMRCcP ofN-vinyl-3-ethyl imidazolium bromide (VEtImBr) and 1,13-divinyl-3-decyl diimidazoliumbromide (DVImBr) was achieved in water at 30 °C, leading to hydrophilic poly(VEtImBr-co-DVImBr) nanogels. The antibacterial activity of these cross-linked structures wasinvestigated. The hydrophobic pendants of these PIL-based nanogels were synthesized viadirect CMRCcP in ethyl acetate, using bis(trifluromethanesulfonyl)imide (NTf2-) counteranions. An array of these poly(VEtImNTf2-co-DVImNTf2) nanogels was then investigated aspossible coatings for porous patterned surfaces, and their ionic conductivity assessed.Different cross-linked architecture were approached, using a mono- and a divinyl comonomersof completely different reactivities
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Ray, Judith Victoria. "Novel molecular imprinted nanogels as drug delivery vehicles for tamoxifen." Thesis, Queen Mary, University of London, 2014. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8856.

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The field of nanomedicine has witnessed an incredible expansion, from a total market value in 2003 of $500 million expected to rise to $160 billion by 2015 (Global Industry Analysts, Inc.). The nanomedicine industry is forecasted to grow and have a significant impact on the economy, with sectors such as biomaterials, diagnostics and drug delivery expected to play a major role. This thesis gives a detailed account of the synthesis and characterisation of molecularly imprinted nanogels for drug delivery. Their toxicity and potential use as a targeted carrier to cancerous cells is evaluated. Initially an overview of nanomaterials and their uses in many areas such as agriculture, energy storage and technology are discussed. The impact of nanomaterials on the life sciences is examined; in particular their application in drug delivery is focussed upon. Chapters 2, 3 and 4 make up the results and discussion of this work. Chapter 2 focuses on developing the synthesis of the acrylamide based nanogels and, vitally, incorporating a suitable fluorescent tag in order to track the nanogels in vitro and in vivo. Fundamentally toxicity studies carried out on the nanogels, both in vitro and in vivo in Danio rerio (zebrafish) are reported in Chapter 3 to ensure the nanogels are biocompatible. Chapter 4 introduces an innovative approach, molecular imprinting, to incorporating a drug into the nanogels. The upload and release of Tamoxifen (a drug used to treat breast cancer) at reduced pH, was also analysed. Finally future development of the carrier is discussed and key issues that need to be addressed.
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Khlebtsov, B. N., and E. V. Panfilova. "Synthesis and Study of PNIPAM Nanogels Incorporated with Colloidal Silver." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35090.

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Composite nanoparticles consisting of polymer gels with incorporated silver nanoparticles have been synthesized. The synthesis comprises two main stages. Initially, monodisperse hydrogel particles with a controlled diameter of approximately 500 nm are obtained by N-isopropylacrylamide polymerization. Then, silver ions are reduced on the surface of the polymer network. Variations in the concentration ratio between reductants and silver nitrate make it possible to produce silver nanoparticles with sizes in a range of 10-30 nm and different packing densities on the gel particle surface. The resultant nanocomposites have been studied by transmission electron microscopy, spectrophotometry, and dynamic light scattering. Depending on the size and packing density of the silver nanoparticles on the polymer particle surface, the plasmon resonance of the nanocomposites varies in a range of 420-750 nm, which determines variations in the color of the colloid from yellow, orange, and red to blue and blue-green. After the inclusion of silver nanoparticles, nanogels of poly(N-isopropylacrylamide) retain their capability for thermosensitive phase transition with a lower critical mixing temperature of 31 °C. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35090
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Books on the topic "Nanogels"

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Vashist, Arti, Ajeet K. Kaushik, Sharif Ahmad, and Madhavan Nair, eds. Nanogels for Biomedical Applications. Royal Society of Chemistry, 2017. http://dx.doi.org/10.1039/9781788010481.

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Osovetsky, Boris. Natural Nanogold. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59159-9.

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Kronholz, Stephan. Integration von Nanostrukturen durch alternative Methoden: Mizellen-Deposition, Template-Wachstum und Nanogaps. Forschungszentrum Jülich GmbH, Zentralbibliothek, 2007.

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Lin, Chien-Chi, Emanuele Mauri, and Filippo Rossi, eds. Advances in Nanogels. MDPI, 2023. http://dx.doi.org/10.3390/books978-3-0365-6421-0.

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Vashist, Arti, Madhavan Nair, Sharif Ahmad, and Ajeet K. Kaushik. Nanogels for Biomedical Applications. Royal Society of Chemistry, The, 2017.

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Nair, Madhavan, Sharif Ahmad, Ritesh, Vinay Bhardwaj, and Ajeet K. Kaushik. Nanogels for Biomedical Applications. Royal Society of Chemistry, The, 2017.

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Vashist, Arti, Madhavan Nair, Sharif Ahmad, and Ajeet K. Kaushik. Nanogels for Biomedical Applications. Royal Society of Chemistry, The, 2017.

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Hydrogels, Microgels and Nanogels [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.83312.

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Umeyor, Chukwuebuka, Emmanuel Uronnachi, and Pratik Kakade. Hydrogels and Nanogels: Applications in Medicine. IntechOpen, 2024.

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Sinha, Ray Suprakas, Adekoya Oluwasegun Chijioke, and Adekoya Gbolahan Joseph. Polymeric Nanogels for Therapeutic and Diagnostic Applications. Elsevier Science & Technology, 2024.

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Book chapters on the topic "Nanogels"

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Zhang, Zhian. "Activated Carbon Nanogels." In Carbon Nanomaterials Sourcebook. CRC Press, 2018. http://dx.doi.org/10.1201/9781315371337-8.

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Kabanov, Alexander V., and Serguei V. Vinogradov. "Nanogels as Pharmaceutical Carriers." In Multifunctional Pharmaceutical Nanocarriers. Springer New York, 2008. http://dx.doi.org/10.1007/978-0-387-76554-9_3.

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Pamfil, Daniela, and Cornelia Vasile. "Nanogels of Natural Polymers." In Polymer Gels. Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-6080-9_4.

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Rosales-Mendoza, Sergio, and Omar González-Ortega. "Nanogels-Based Mucosal Vaccines." In Nanovaccines. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-31668-6_6.

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Rangaraj, Nagarjun, and Sunitha Sampathi. "Nanogels for Brain Targeting." In Nanocarriers for Brain Targeting. Apple Academic Press, 2019. http://dx.doi.org/10.1201/9780429465079-15.

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Vashist, Arti, Ajeet Kaushik, Anujit Ghosal, et al. "Chapter 1. Journey of Hydrogels to Nanogels: A Decade After." In Nanogels for Biomedical Applications. Royal Society of Chemistry, 2017. http://dx.doi.org/10.1039/9781788010481-00001.

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Ghosal, Anujit, Shivani Tiwari, Abhijeet Mishra, et al. "Chapter 2. Design and Engineering of Nanogels." In Nanogels for Biomedical Applications. Royal Society of Chemistry, 2017. http://dx.doi.org/10.1039/9781788010481-00009.

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Sharmin, Eram. "Chapter 3. Medical Applications of Nanogels." In Nanogels for Biomedical Applications. Royal Society of Chemistry, 2017. http://dx.doi.org/10.1039/9781788010481-00029.

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Chopra, Vianni, Gaurav Chauhan, Ritesh Kumar, Manish M. Kulkarni, and Atul Vashist. "Chapter 4. Nanogels in the Diagnosis and Treatment of Tuberculosis." In Nanogels for Biomedical Applications. Royal Society of Chemistry, 2017. http://dx.doi.org/10.1039/9781788010481-00053.

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Thompson, Jefferson, and Rupak Dua. "Chapter 5. Nanogels for Tissue Engineering." In Nanogels for Biomedical Applications. Royal Society of Chemistry, 2017. http://dx.doi.org/10.1039/9781788010481-00077.

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Conference papers on the topic "Nanogels"

1

Sun, Sky, Mido Kim, Juiena Hasan, and Sangho Bok. "Stress-Induced Microstructures and Nanogaps Embedded in Plasmonic Gratings." In 2024 IEEE Nanotechnology Materials and Devices Conference (NMDC). IEEE, 2024. https://doi.org/10.1109/nmdc58214.2024.10894070.

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Ji, Gangseon, Hyosim Yang, Min Choi, et al. "Suppression of terahertz collective motion of water confined in nanogaps." In Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXII, edited by Yu-Jung Lu and Takuo Tanaka. SPIE, 2024. http://dx.doi.org/10.1117/12.3028441.

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Wu, Dezhi, Xuejiao Liu, Yiming Qin, et al. "NanoGen: A High-affinity Nanobody Generation Model with Guided Diffusion." In ICASSP 2025 - 2025 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP). IEEE, 2025. https://doi.org/10.1109/icassp49660.2025.10888039.

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Li, Y., Y. Cheng, and G. Meng. "Vacuum breakdown in nanogaps: Interactions between high electric field and metal materials." In 2024 IEEE International Conference on Plasma Science (ICOPS). IEEE, 2024. http://dx.doi.org/10.1109/icops58192.2024.10625828.

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Suleimanov, B. A., and E. F. Veliyev. "Nanogels for Deep Reservoir Conformance Control." In SPE Annual Caspian Technical Conference & Exhibition. Society of Petroleum Engineers, 2016. http://dx.doi.org/10.2118/182534-ms.

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Das, Rabindra N., Varaprasad Calmidi, Mark D. Poliks, and Voya R. Markovich. "Nanofluids, nanogels and nanopastes for electronic packaging." In 2010 Proceedings 60th Electronic Components and Technology Conference (ECTC). IEEE, 2010. http://dx.doi.org/10.1109/ectc.2010.5490857.

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Suleimanov, B. A., and E. F. Veliyev. "Nanogels for Deep Reservoir Conformance Control (Russian)." In SPE Annual Caspian Technical Conference & Exhibition. Society of Petroleum Engineers, 2016. http://dx.doi.org/10.2118/182534-ru.

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Craciunescu, I., A. Petran, C. Daia, O. Marinica, L. Vekas, and R. Turcu. "Stimuli responsive magnetic nanogels for biomedical application." In PROCESSES IN ISOTOPES AND MOLECULES (PIM 2013). AIP, 2013. http://dx.doi.org/10.1063/1.4833728.

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Cong, Tao, Satvik N. Wani, Georo Zhou, Elia Baszczuk, and Radhakrishna Sureshkumar. "Plasmonic nanogels with robustly tunable optical properties." In SPIE NanoScience + Engineering. SPIE, 2011. http://dx.doi.org/10.1117/12.894070.

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Masiero, Diana M. A., María I. Hernández, Isabel N. Vega, et al. "Swellable Nanogels Injection Pilot in Mendoza Norte, Argentina." In SPE International Conference on Oilfield Chemistry. Society of Petroleum Engineers, 2017. http://dx.doi.org/10.2118/184586-ms.

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Reports on the topic "Nanogels"

1

Chung, Fang-Yu, and Yu-Fon Chen. Chemical modified natural nanogels crosslinked with S Benzyl L cysteine exhibit potent antibacterial activity. Peeref, 2023. http://dx.doi.org/10.54985/peeref.2303p2513551.

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Hainfield, J. F., and F. R. Furuya. Silver enhancement of nanogold and undecagold. Office of Scientific and Technical Information (OSTI), 1995. http://dx.doi.org/10.2172/105658.

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Zaraisky, Е. I. Use and biosafety of nanogold conjugates in medicine. Volume 1. Nanogold conjugates with monoclonal antibodies against a potential PAMG-1 oncoantigen. Primedia E-launch LLC, 2018. http://dx.doi.org/10.18411/978-1-64516-926-0.

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Zaraisky, E. I. Detection of PAMG-1 oncoantigen using nanogold conjugates with monoclonal antibodies in samples of biological fluids. Editors of the Eurasian Scientific Journal, 2018. http://dx.doi.org/10.18411/esj_n12_2018-145-150.

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Zaraisky, E. I., A. A. Stepanov та A. M. Poltavtsev. Express test for the simultaneous diagnosis of encountering PAMG-1 and PAMG - 2 using technique of immune chromatography using nanogold and IPMS-ELISA using isotopes Еi3+ and Sm3+. Editors of the Eurasian Scientific Journal, 2018. http://dx.doi.org/10.18411/esj_n12_2018-141-144.

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