1,623 results on '"nanotechnologie"'
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2. Nanomedizin im Chemieunterricht: zielgerichteter Wirkstofftransport mit polymeren Nanopartikeln.
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Fruntke, Antonia, Behnke, Mira, Dietel, Elisabeth, Vollrath, Antje, Schubert, Ulrich S., and Wilke, Timm
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- *
TARGETED drug delivery , *POLYMERS , *AUTHOR-reader relationships , *ENLIGHTENMENT , *CURCUMIN - Abstract
This article explores the field of nanomedicine and its potential applications in targeted drug delivery. It discusses the concept of "nanocarriers" that can transport drugs to specific organs and infected tissues, minimizing side effects. The article presents two experimental series that demonstrate the synthesis and loading of nanoparticles using polymers and various cargos. The experiments investigate the behavior of the nanoparticles in response to changes in pH, showing promising results for targeted drug delivery. The article highlights the educational opportunities and interdisciplinary connections that can be made through the teaching of nanomedicine in chemistry, biology, and physics classes. [Extracted from the article]
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- 2024
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3. Encapsulation of methylene blue in nucleoside-lipid-based liposomes: physicochemical characterization and evaluation for photodynamic therapy
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Koffi Kowouvi, Alexis Verger, Alexandra Gaubert, Philippe Barthelemy, Gilles Dollo, and Nolwenn Brandhonneur
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bleu de methylene ,nanotechnologie ,thérapie photodynamique ,cancer ovarien ,Pharmaceutical industry ,HD9665-9675 - Abstract
Methylene blue liposomes (MB-LPs) intended for photodynamic therapy (PDT) of ovarian cancer were formulated with a negatively charged nucleolipid and phosphatidylcholine using the lipidic film technique followed by an extrusion step. MB-LPs were characterized using dynamic light scattering (DLS), zeta potential (ZP), transmission electron microscopy (TEM), colloidal stability, Fourier-transform infra-red spectroscopy (FT-IR), UV-Visible spectroscopy and cellular studies. MB-LPs were spherical nano-objects with sizes obtained by DLS and TEM between 120 and 130 nm. MB-LPs showed a PDI near 0.10, a negative zeta potential near -42 mV and an encapsulation efficiency around 57 %. Characteristic peaks from ionic interactions of nucleolipids encapsulation of methylene blue were confirmed by FT-IR. Colloidal stability of MB-LPs was slightly affected in complex ionic media, sizes, PDI and ZP remained stable for 4 weeks at all storage temperature tested, allowing a potential use for in vitro and in vivo assays. The use of MB-LPs allowed slightly higher PDT activity based on the production of ROS against SKOV-3 ovarian cancer as compared to MB alone, a reduction of MB dark toxicity and a better protection against oxidation-reduction reactions.
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- 2024
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4. Současný pohled na β-D-glukany: Zdroje a možnosti modifikací.
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Dvořáček, Václav, Havrlentová, Michaela, and Jurkaninová, Lucie
- Abstract
Copyright of Výživa a Potraviny is the property of Spolecnost pro Vyzivu and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
5. „Roušky s TULkou': Věda a etika v liminalitě
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Jana Jetmarová and Michal Trčka
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antistruktura ,covid-19 ,etika ,liminalita ,nanotechnologie ,Philosophy (General) ,B1-5802 - Abstract
Text předkládá výsledky kvalitativní studie, která byla zaměřena na problematiku využití nanomateriálů v mimořádné situaci spojené s pandemií covid-19 na příkladu iniciativy Roušky s TULkou. Ta během několika týdnů iniciovala výrobu vysoce účinných nanovlákenných filtrů s využitím originální technologie (AC Electrospinning) v průmyslovém měřítku. Cílem výzkumu bylo vedle popisu regionální zkušenosti, analyzovat hodnotové výzvy, konflikty a etická dilemata v mimořádné situaci. Hlavními teoretickými východisky studie je turnerovské pojetí liminality, communitas a antistruktury a Stennerův koncept liminálních prostorů. Výsledky výzkumu ukazují, že pandemická situace přispěla k odkrytí nečekaného potenciálu nové technologie, že při realizaci celé aktivity kromě know-how a technického zázemí univerzity sehrál roli především sociální kapitál, a především odkrývají potenciál, který vycházel z antistrukturního charakteru iniciativy a dočasného překročení hierarchicky nastavených univerzitních struktur.
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- 2022
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6. Filosofické problémy nanotechnologií: ontologicko-systémová východiska a etické implikace
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Vít Bartoš and Michal Trčka
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etika ,molekulární výroba ,nanotechnologie ,ontologie ,syntetická biologie ,Philosophy (General) ,B1-5802 - Abstract
Z pozice filosofie vědy a techniky se nejprve zabýváme otázkou, co znamenají nanotechnologie v rámci evoluce technologií. Jejich mimořádný význam primárně vidíme v tom, že jsou technologiemi samotného života. Dále vysvětlujeme, že nanoúroveň je doménou, kde se kříží zákonitosti kvantové a klasické newtonovské fyziky. Z této pozice vycházíme při hledání odpovědi na otázku, za jakých podmínek mění zmenšování věci také jejich funkční podstatu. Na příkladu debaty Drexler vs. Smalley demonstrujeme paradigmatickou nesouměřitelnost obou perspektiv a fyzikálně-chemické a inženýrské limity nanotechnologií. Zvažujeme, nakolik jsou reálná nebezpečí a etické implikace vycházející z Drexlerových úvah, ať už se jedná o tzv. „grey goo“ problém nebo molekulární výrobu. Jako závažnější hodnotíme vybrané problémy spojené se syntetickou biologií. Text zakončujeme úvahou, že pro lidskou civilizaci by mělo být existenční výzvou přemýšlet o možnostech nanotechnologií k rozvíjení života.
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- 2022
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7. Primjena nanočestica u pakiranju ribljih i mesnih proizvoda.
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Ščetar, Mario, Kurek, Mia, Gabrić, Domagoj, and Galić, Kata
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MEAT industry ,TECHNOLOGICAL innovations ,FOOD industry ,PRODUCT safety ,CHEMICAL properties ,BIOSURVEILLANCE ,SAFETY regulations - Abstract
Copyright of MESO is the property of Zadruzna Stampa D.D. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2023
8. Equipement et traitement d’eau pour la gestion quotidienne de l’hémodialyse à domicile
- Author
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Tomas SERRATO
- Subjects
hémodialyse domicile ,eau ,écologie ,sorbants ,nanotechnologie ,low flow ,Internal medicine ,RC31-1245 - Abstract
L’hémodialyse à domicile doit rester une technique parmi tant d’autres pour traiter l’insuffisance rénale terminale. Pour cela tout doit être mis en place pour que les patients puissent avoir le choix, aidés par leur équipe soignante. La gestion de l’accessibilité à un traitement d’eau à domicile reste encore de nos jours difficile malgré les progrès notables lors des dernières décennies. Le développement de l’HDQD sans avoir à installer un traitement d’eau au domicile des patients est un progrès notable qui a donné un élan nécessaire au développement du traitement du patient au domicile. Les défis restent grands malgré tout, notamment pour le développement de la dialyse à sorbants qui devrait revoir le jour avec l’aide des nanotechnologies cela aidera à augmenter le nombre de patients, mais aussi à avoir une attitude éco responsable, en diminuant les quantités d’eau utilisées et les déchets générés par ce type de traitement.
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- 2022
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9. Virtuelle Materie
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Rieger, Stefan, Kasprowicz, Dawid, editor, and Rieger, Stefan, editor
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- 2020
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10. Nanotechnology in the Automotive Industry
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Huaihe Song, Tuan Anh Nguyen, Ghulam Yasin, Nakshatra Bahadur Singh, Ram K. Gupta, Huaihe Song, Tuan Anh Nguyen, Ghulam Yasin, Nakshatra Bahadur Singh, and Ram K. Gupta
- Subjects
- Nanotechnology, Automobiles--Technological innovations, Automobiles--Innovations, Nanotechnologie
- Abstract
Nanotechnology in the Automotive Industry explores how nanotechnology and nanomaterials are used to enhance the performance of materials and devices for automotive application by fabricating nano-alloys, nanocomposites, nano coatings, nanodevices, nanocatalysts and nanosensors. Consisting of 36 chapters in 6 parts, this new volume in the Micro and Nano Technologies series is for materials scientists, nanotechnologists and automotive engineers working with nanotechnology and nanomaterials for automotive applications. Nanotechnology is seen as one of the core technologies for the future automotive industry to sustain competitiveness. The benefits that nanotechnology brings to the automotive sector include stronger and lighter materials for increased safety and reduced fuel consumption, improved engine performance and fuel consumption for gasoline powered vehicles due to nanocatalysts, fuel additives and lubricants, and more. - Discusses various approaches and techniques such as nanoalloys, nanocomposites, nanocoatings, nanodevices, nanocatalysts and nanosensors used in modern vehicles - Presents the challenges and future of automotive materials - Explores how nanotechnology and nanomaterials are used to enhance the performance of materials and devices for automotive applications
- Published
- 2022
11. Der Einfluss von Nanoconfinement auf die Elektrokatalyse.
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Wordsworth, Johanna, Benedetti, Tania M., Somerville, Samuel V., Schuhmann, Wolfgang, Tilley, Richard D., and Gooding, J. Justin
- Abstract
Die Verwendung von Nanopartikeln und nanostrukturierten Elektroden ist in der Elektrokatalyse weit verbreitet. Diese nanometrischen Systeme enthalten je nach Geometrie Elemente des Nanoconfinements in unterschiedlichem Ausmaß, was sich viel stärker auf die Aktivität und Selektivität auswirken kann, als oft angenommen wird. In diesem Aufsatz identifizieren wir zunächst die Systeme, die unterschiedliche Grade von Nanoconfinement enthalten, und zeigen, wie sie die Aktivität und Selektivität elektrokatalytischer Reaktionen beeinflussen können. Anschließend wird ein grundlegendes Verständnis der Auswirkungen des Nanoconfinements auf die Elektrochemie und Elektrokatalyse vermittelt, das dank der Entwicklung neuer, atomar präziser Herstellungs‐ und Fertigungstechniken und Fortschritten bei der theoretischen Modellierung allmählich erschlossen wird. Diese Übersicht soll dabei helfen, die Nanostrukturierung nicht nur zur Vergrößerung der Oberfläche zu nutzen, sondern auch die thermodynamisch bedingten Skalierungsbeziehungen in der Elektrokatalyse zu durchbrechen. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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12. ROUŠKY S TULKOU: VĚDA A ETIKA V LIMINALITĚ.
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JETMAROVÁ, JANA and TRČKA, MICHAL
- Abstract
The text presents the results of a qualitative study focused on the issue of using nanomaterials in the extraordinary circumstances linked to the COVID-19 pandemic, particularly referring to the "Roušky s TULkou" initiative. Within several weeks, this initiative managed to launch the production of highly efficient nanofiber filters using the original AC Electrospinning technology on an industrial scale. The goal of the research was to analyse both the regional experience and the value-based challenges, conflicts and ethical dilemmas posed by an emergency situation. The theoretical starting points of the research were the Turnerian understanding of liminality, communitas and antistructure and Stenner's concept of liminal spaces. The results of the research show that the pandemic situation contributed to the emergence of an unexpected potential of the new technology and that the realisation of the activity was influenced not only by know-how and the university's technical facilities, but particularly by social capital, thus uncovering the potential of the antistructural character of the initiative and the temporary suspension of hierarchically established university structures. [ABSTRACT FROM AUTHOR]
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- 2022
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13. FILOSOFICKÉ PROBLÉMY NANOTECHNOLOGIÍ: ONTOLOGICKO-SYSTÉMOVÁ VÝCHODISKA A ETICKÉ IMPLIKACE.
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BARTOŠ, VÍT and TRČKA, MICHAL
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From the perspective of philosophy of science and technologies, we firstly attend to the issue of the role of nanotechnologies within the evolution of technologies. We recognize their utmost importance in the respect that they are technologies of life itself. We further explain that the nano-level is the domain of intersection of the rules of quantum physics and traditional Newtonian physics. This is our starting point from which we discuss the issue of conditions under which minimizing things also changes their functional essence. We use the example of the Drexler vs. Smalley debate to demonstrate the paradigmatic incomparability of the two perspectives and the physical-chemical and engineering-related limits of nanotechnologies. We discuss to what extent are the dangers and ethical implications emerging from Drexler's contemplations real, be it what he calls the "grey goo" problem or the issues of molecular production. We regard certain problems linked to synthetic biology as more serious. We conclude our text with the consideration that the human civilization should think of the possibilities of nanotechnologies in the development of life as an existential challenge. [ABSTRACT FROM AUTHOR]
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- 2022
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14. 3D Mikro- und Nano-Strukturierung mittels Zwei-Photonen-Polymerisation
- Author
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El-Tamer, Ayman, Hinze, Ulf, Chichkov, Boris N., Lachmayer, Roland, editor, and Lippert, Rene Bastian, editor
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- 2017
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15. Selbstregeneration und Selbstheilung in DNA‐Origami‐Nanostrukturen.
- Author
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Scheckenbach, Michael, Schubert, Tom, Forthmann, Carsten, Glembockyte, Viktorija, and Tinnefeld, Philip
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DESIGN - Abstract
DNA‐Nanotechnologie und Fortschritte in der DNA‐Origami‐Technik haben das einfache Design und die Synthese komplexer und funktioneller Nanostrukturen ermöglicht. Jedoch sind molekulare Geräte aufgrund des hohen Anteils von Oberflächenatomen und der komplexen Einsatzbedingungen im Nanomaßstab anfällig für eine schnelle funktionelle und strukturelle Degradierung. Neben Stabilisierungsmechanismen sind Ansätze zur Selbstreparatur funktioneller molekularer Geräte wünschenswert. Hier nutzen wir die selbst‐assemblierenden und rekonfigurierbaren Eigenschaften von DNA‐Origami‐Nanostrukturen für die Selbstreparatur von photoinduzierten und enzymatischen Schäden aus. Wir geben Beispiele für die Reparatur von DNA‐Nanostrukturen, die den Unterschied zwischen unspezifischer Selbstregeneration und schadensspezifischer Selbstheilung aufzeigen. Anhand von DNA‐Origami‐Nanolinealen, die mit Rasterkraftmikroskopie und DNA‐PAINT‐Superauflösungs‐Mikroskopie untersucht wurden, demonstrieren wir die quantitative Aufrechterhaltung der Fluoreszenzeigenschaften mit direktem Potenzial zur Verbesserung nanoskaliger Kalibrierproben. [ABSTRACT FROM AUTHOR]
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- 2021
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16. Análisis de redes sociales de un clúster en tecnologías emergentes
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Melissa Yanell Sepúlveda López
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Nanotecnología ,Clúster ,Nanotecnologia ,Redes sociais ,Communication ,Inovação ,Analyse de réseaux sociais ,Social network analysis ,Innovación ,Cluster ,Nanotechnology ,Análisis de redes sociales ,Innovation ,Nanotechnologie ,Social Sciences (miscellaneous) - Abstract
La formación de clústeres para la creación de ciencia, tecnología e innovación (CTI) es un fenómeno social, ya que implica el establecimiento de relaciones de colaboración entre distintas organizaciones, y su localización en un área geográfica determinada, con el propósito expreso de generar CTI. Por lo que utilizar el análisis de redes sociales (ARS) permite plantear el fenómeno en términos relacionales, analizando patrones de intercambio y organización. Este estudio utiliza el enfoque de ARS para analizar al Clúster de Nanotecnología de Nuevo León (CNNL), y su rol en la red de producción de nanotecnología del estado. Se encontró que los laboratorios de las universidades y centros de investigación que pertenecen al CNNL poseen las medidas de centralidad más altas de la red, por lo que la estructuran y conectan a los demás actores, a pesar de ser minoría en contra del sector industrial. Así mismo, solo una pequeña parte de los vínculos formales hechos para producir nanotecnología se traducen en vínculos de comercialización o patentes, las cuáles son mayormente producidas por universidades y centros de investigación. Esto puede indicar que la producción de nanotecnología en Nuevo León se queda mayormente en los laboratorios, y no necesariamente se aplica comercialmente. The formation of clusters for the creation of science, technology and innovation (STI) is a social phenomenon, since it implies the formation of collaborative relationships between different organizations, as well as their location in a specific geographical area, with the express purpose of generating STI . Therefore, using Social Networks Analysis (SRA) allows for the study of this phenomenon in relational terms, through the analysis of patterns of exchange and organization. This study uses the ARS approach to analyze the Nuevo León Nanotechnology Cluster (NLNC) and its role in the state's nanotechnology production network. It was concluded that the laboratories of the universities and research centers that belong to the NLNC have the highest centrality measures of the network, so they structure it and connect the other actors, despite being a minority against the industrial sector. Likewise, only a small part of the formal links made to produce nanotechnology are translated into commercialization links or patents. These are mostly produced by universities and research centers, and not by businesses. This seems to indicate that the production of nanotechnology in Nuevo León remains mostly in the laboratories, and is not necessarily applied or commercialized. La formation de clusters pour la création de la science, de la technologie et de l'innovation (CTI) est un phénomène social, car elle implique l'établissement de relations de collaboration entre différentes organisations et leur localisation dans une certaine zone géographique, dans le but exprès de générer des CTI. . Ainsi, l'utilisation de l'analyse des réseaux sociaux (ARS) permet d'appréhender le phénomène en termes relationnels, en analysant les schémas d'échange et d'organisation. Cette étude utilise l'approche ARS pour analyser le Nuevo León Nanotechnology Cluster (CNNL) et son rôle dans le réseau de production de nanotechnologie de l'État. Il a été constaté que les laboratoires des universités et des centres de recherche appartenant au CNNL ont les mesures de centralité les plus élevées du réseau, c'est pourquoi ils le structurent et le connectent aux autres acteurs, bien qu'ils soient minoritaires face au secteur industriel. De même, seule une petite partie des liens formels établis pour produire des nanotechnologies se traduisent par des liens de commercialisation ou des brevets, qui sont principalement produits par des universités et des centres de recherche. Cela peut indiquer que la production de nanotechnologies à Nuevo León reste principalement dans les laboratoires et n'est pas nécessairement appliquée commercialement. A formação de clusters para a criação de ciência, tecnologia e inovação (CTI) é um fenômeno social, pois implica o estabelecimento de relações colaborativas entre diferentes organizações, e sua localização em uma determinada área geográfica, com o propósito expresso de gerar CTI. . Portanto, utilizar a análise de redes sociais (ARS) permite considerar o fenômeno em termos relacionais, analisando padrões de troca e organização. Este estudo usa a abordagem ARS para analisar o Cluster de Nanotecnologia de Nuevo León (CNNL) e seu papel na rede de produção de nanotecnologia do estado. Constatou-se que os laboratórios das universidades e centros de pesquisa pertencentes ao CNNL possuem as maiores medidas de centralidade da rede, motivo pelo qual a estruturam e a conectam aos demais atores, apesar de serem minoria frente ao setor industrial. Da mesma forma, apenas uma pequena parte dos vínculos formais feitos para produzir nanotecnologia se traduz em vínculos de comercialização ou patentes, que são produzidos em sua maioria por universidades e centros de pesquisa. Isso pode indicar que a produção de nanotecnologia em Nuevo León permanece principalmente em laboratórios, e não necessariamente aplicada comercialmente.
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- 2023
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17. Moderne Konzepte der Nanobiotechnologie für mRNA‐Abgabesysteme.
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Wang, Yue and Yu, Chengzhong
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MESSENGER RNA - Abstract
Die Einführung von mRNA in Zellen hat in vielen Anwendungsbereichen starkes Interesse geweckt, doch für eine erfolgreiche Einführung sind spezifische Lösungen erforderlich. Technisch hergestellte Nanomaterialien wurden bereits als mRNA‐Nanoträger eingesetzt; ihre Funktionen wurden hauptsächlich als Boten konzipiert, aber nur selten auch für die Regulation der Proteintranslation. Jüngste Fortschritte in der Konzipierung von mRNA‐Nanoträgern gehen von einfachen Bereitstellungswerkzeugen zu komplexen Translationsmodulatoren über. In diesem Kurzaufsatz diskutieren wir moderne Konzepte von Nanomaterialien, welche die mRNA‐Translation regulieren, sowie neuere Fortschritte der mRNA‐Bereitstellung. Ebenfalls betrachtet werden spezifisch entwickelte, funktionelle Nanomaterialien für vielseitige mRNA‐Anwendungen, um Erkenntnisse für die Konzipierung von Nanomaterialien der nächsten Generation zu gewinnen, die die mRNA‐Technologie revolutionieren sollen. [ABSTRACT FROM AUTHOR]
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- 2020
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18. Nanotechnologie in Schülerlabor und Schule – Experimenteller Zugang zu alltagsnahen nanotechnologischen Facetten.
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Reimann, Maria, Herzog, Stefanie, Parchmann, Ilka, and Schwarzer, Stefan
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STUDENT development , *NANOTECHNOLOGY , *CURRICULUM , *EVERYDAY life - Abstract
Out‐of‐school learning settings are widely spread throughout Germany. STEM student labs are one particular type of out‐of‐school learning settings, which constitute a beneficial addition to STEM school lessons as they are not part of the school curriculum. Through these student labs, students can engage in highly relevant and complex scientific content areas in an authentic environment. In this article, the student lab program nawi:klick!, taking place at the Forschungswerkstatt in Kiel, Germany, will be presented. This program focuses on the presentation of nanotechnological contents and nanosciences in daily life. Based on adjacent questionnaires it could be shown that the learning setting indeed offers perceived knowledge gains as well as a development of students' experimental competences and that the intended relevance for students' daily lives is recognized. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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19. دور تكنولوجيا النانو في تحقيق متطمبات التنمية المستدامة مع الإشارة إلى حالة الج ا زئر
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د : مبارك قرقب and د : مراد محبوب
- Abstract
Copyright of Journal of Economic Sciences, Management & Commercial Sciences (JESMCS) is the property of Association of Arab Universities and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
20. Polymer-based nanoinsecticides: current developments, environmental risks and future challenges. A review.
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Changjiao Sun, Zhanghua Zeng, Haixin Cui, and Verheggen, François
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BIOPOLYMERS ,ENVIRONMENTAL risk ,POLYLACTIC acid ,ENVIRONMENTAL protection ,POLYHYDROXYBUTYRATE ,POLYMERS ,POLYETHYLENE glycol - Abstract
Copyright of Biotechnologie, Agronomie, Societe et Environnement is the property of Les Presses Agronomiques de Gembloux and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
- Full Text
- View/download PDF
21. Immunotherapeutics for head and neck squamous cell carcinoma stem cells.
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Qian, X., Leonard, F., Wenhao, Y., Sudhoff, H., Hoffmann, T. K., Ferrone, S., Kaufmann, A. M., and Albers, A. E.
- Abstract
Copyright of HNO is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
- Full Text
- View/download PDF
22. Využití nanotechnologií v radiační onkologii
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Lierová, Anna, Červenková, Zuzana, Buchta, Vojtěch, Lierová, Anna, Červenková, Zuzana, and Buchta, Vojtěch
- Abstract
Bakalářská práce je zpracována jako rešerše dostupných informací o nanotechnologiích a jejich využití v radiační onkologii. V teoretické části se sumarizují informace o nanotechnologiích, nanočásticích, jejich historii a využití v terapii. Výzkumná část se skládá ze souhrnné analýzy dostupných studií, dedikované laboratorním experimentům na zvířatech, o zlatých nanočásticích a jejich potenciálů být radiačními radiosenzibilizátory., The bachelor thesis is processed as research of existing information on nanotechnologies and their use in radiation oncology. In the theoretical part is summarized information about nanotechnologies, nanoparticles, their history, and their use in therapy. The research part consists of a summary analysis of available studies and dedicated laboratory experiments on animals using gold nanoparticles and their potential to be radiation radiosensitizers., Fakulta zdravotnických studií, Student/ka úspěšně obhájil/a bakalářskou práci, odpověděl/a na doplňující otázky oponenta., Dokončená práce s úspěšnou obhajobou
- Published
- 2023
23. Verkenning sleuteltechnologieën voor LNV : achtergrondrapportage
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Scholten, C., Oomens, I., Linden, E. van der, Meulengraaf, J. van de, Erven, C., Veen, G. van der, Scholten, C., Oomens, I., Linden, E. van der, Meulengraaf, J. van de, Erven, C., and Veen, G. van der
- Abstract
Dit achtergrondrapport maakt onderdeel uit van een verkenning naar de mate waarin diverse sleuteltechnologieën kunnen bijdragen aan de missies van LNV (missies: A – Kringlooplandbouw; B – Klimaatneutrale landbouw en voedselproductie; C – Klimaatbestendig landelijk en stedelijk gebied; D – Gewaardeerd, gezond en veilig voedsel; en E – Duurzame en veilige Noordzee en andere wateren). Sleuteltechnologieën (key enabling technologies) hebben de potentie om via nieuwe goederen, diensten of processen de economie te versterken en oplossingen te bieden voor maatschappelijke uitdagingen. Voor elke sleuteltechnologie is een fiche uitgewerkt die is opgenomen in dit rapport. Over alle fiches heen is een analyse gemaakt die zich richt op onderzoeksvragen van de verkenning. De analyse, en de conclusies en aanbevelingen die op basis daarvan zijn opgesteld, zijn te vinden in het separate eindrapport van deze verkenning.
- Published
- 2023
24. Verkenning sleuteltechnologieën voor LNV : eindrapport
- Author
-
Scholten, C., Oomens, I., Linden, E. van der, Meulengraaf, J. van de, Erven, C., Veen, G. van der, Scholten, C., Oomens, I., Linden, E. van der, Meulengraaf, J. van de, Erven, C., and Veen, G. van der
- Abstract
Dit rapport bevat de resultaten en analyse van een verkenning naar de mate waarin diverse sleuteltechnologieën kunnen bijdragen aan de missies van LNV (missies: A – Kringlooplandbouw; B – Klimaatneutrale landbouw en voedselproductie; C – Klimaatbestendig landelijk en stedelijk gebied; D – Gewaardeerd, gezond en veilig voedsel; en E – Duurzame en veilige Noordzee en andere wateren). Voor elke sleuteltechnologie (key enabling technology) is een fiche uitgewerkt die is opgenomen in een separaat achtergrondrapport. Over alle fiches heen is een analyse gemaakt die zich richt op onderzoeksvragen van deze verkenning en de mate waarin sleuteltechnologieën kunnen bijdragen aan de missies van LNV. Op basis daarvan zijn voorlopige conclusies en aanbevelingen geformuleerd ten aanzien van het sleuteltechnologiegerichte beleid van LNV. Deze analyse, conclusies en aanbevelingen staan centraal in dit rapport.
- Published
- 2023
25. Chemistry and Physics of Modern Materials : Processing, Production and Applications
- Author
-
Jimsher N. Aneli, Alfonso Jimenez, Stefan Kubica, Jimsher N. Aneli, Alfonso Jimenez, and Stefan Kubica
- Subjects
- Nanotechnology, Nanostructured materials, Nanotechnologie, Nanomate´riaux
- Abstract
With contributions from top nanoscientists, this book offers a global perspective on the latest developments in nanotechnology. It covers the major themes of nanoscience and nanotechnology, addressing many of the major issues, from concept to technology to implementation. It is an important reference publication that provides new research and updat
- Published
- 2013
26. Nanomedicine and Drug Delivery
- Author
-
Mathew Sebastian, Neethu Ninan, A. K. Haghi, Mathew Sebastian, Neethu Ninan, and A. K. Haghi
- Subjects
- Nanomedicine, Drug delivery systems, Nanotechnology, Nanome´decine, Syste`mes d'administration de me´dicaments, Nanotechnologie
- Abstract
This forward-looking book focuses on the recent advances in nanomedicine and drug delivery. It outlines the extraordinary new tools that have become available in nanomedicine and presents an integrated set of perspectives that describe where we are now and where we should be headed to put nanomedicine devices into applications as quickly as possibl
- Published
- 2013
27. Ausgewogene Wissenschaftsberichterstattung der Qualitätspresse? : Eine Inhaltsanalyse zur Nanoberichterstattung in repräsentativen Medien Österreichs, Deutschlands und der Schweiz
- Author
-
Haslinger, Julia, Hocke, Peter, Hauser, Christiane, Gazsó, André, editor, and Haslinger, Julia, editor
- Published
- 2014
- Full Text
- View/download PDF
28. EU-Verhaltenskodex Nanotechnologie: Rechtsstaatliche und demokratische Aspekte
- Author
-
Eisenberger, Iris, Gazsó, André, editor, and Haslinger, Julia, editor
- Published
- 2014
- Full Text
- View/download PDF
29. Green nano und der Forschungsalltag – Niederschlag eines Konzepts in der aktuellen Nanotechnologie-Umweltforschung
- Author
-
Fuchs, Daniela, Gazsó, André, editor, and Haslinger, Julia, editor
- Published
- 2014
- Full Text
- View/download PDF
30. A Photolabile Semiconducting Polymer Nanotransducer for Near‐Infrared Regulation of CRISPR/Cas9 Gene Editing.
- Author
-
Lyu, Yan, He, Shasha, Li, Jingchao, Jiang, Yuyan, Sun, He, Miao, Yansong, and Pu, Kanyi
- Subjects
- *
GENOME editing , *GENETIC regulation , *GENE therapy , *GENE expression , *POLYMERS - Abstract
Noninvasive regulation of CRISPR/Cas9 gene editing is conducive to understanding of gene function and development of gene therapy; however, it remains challenging. Herein, a photolabile semiconducting polymer nanotransducer (pSPN) is synthesized to act as the gene vector to deliver CRISPR/Cas9 plasmids into cells and also as the photoregulator to remotely activate gene editing. pSPN comprises a 1O2‐generating backbone grafted with polyethylenimine brushes through 1O2‐cleavable linkers. NIR photoirradiation spontaneously triggers the cleavage of gene vectors from pSPN, resulting in the release of CRISPR/Cas9 plasmids and subsequently initiating gene editing. This system affords 15‐ and 1.8‐fold enhancement in repaired gene expression relative to the nonirradiated controls in living cells and mice, respectively. As this approach does not require any specific modifications on biomolecular components, pSPN represents the first generic nanotransducer for in vivo regulation of CRISPR/Cas9 gene editing. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
31. Direct Synthesis of Multiplexed Metal‐Nanowire‐Based Devices by Using Carbon Nanotubes as Vector Templates.
- Author
-
Clément, Pierrick, Xu, Xinzhao, Stoppiello, Craig T., Rance, Graham A., Attanzio, Antonio, O'Shea, James N., Temperton, Robert H., Khlobystov, Andrei N., Lovelock, Kevin R. J., Seymour, Jake M., Fogarty, Richard M., Baker, Alastair, Bourne, Richard A., Hall, Brendan, Chamberlain, Thomas W., and Palma, Matteo
- Subjects
- *
CARBON nanotubes , *SINGLE walled carbon nanotubes , *NANOWIRE devices , *CHEMICAL templates , *ELECTRONIC equipment , *METAL fabrication , *SYNTHESIS of nanowires - Abstract
We present the synthesis of metal nanowires in a multiplexed device configuration using single‐walled carbon nanotubes (SWNTs) as nanoscale vector templates. The SWNT templates control the dimensionality of the wires, allowing precise control of their size, shape, and orientation; moreover, a solution‐processable approach enables their linear deposition between specific electrode pairs in electronic devices. Electrical characterization demonstrated the successful fabrication of metal nanowire electronic devices, while multiscale characterization of the different fabrication steps revealed details of the structure and charge transfer between the material encapsulated and the carbon nanotube. Overall the strategy presented allows facile, low‐cost, and direct synthesis of multiplexed metal nanowire devices for nanoelectronic applications. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
32. Highly Reproducible Formation of a Polymer Single‐Molecule Junction for a Well‐Defined Current Signal.
- Author
-
Harashima, Takanori, Hasegawa, Yusuke, Kaneko, Satoshi, Kiguchi, Manabu, Ono, Tomoya, and Nishino, Tomoaki
- Subjects
- *
SINGLE molecules , *NANOELECTRONICS , *MACROSCOPIC kinetics , *MONOMERS , *QUANTITATIVE chemical analysis - Abstract
Single‐molecule devices attract much interest in the development of nanoscale electronics. Although a variety of functional single molecules for single‐molecule electronics have been developed, there still remains the need to implement sophisticated functionalization toward practical applications. Given its superior functionality encountered in macroscopic materials, a polymer could be a useful building block in the single‐molecule devices. Therefore, a molecular junction composed of polymer has now been created. Furthermore, an automated algorithm was developed to quantitatively analyze the tunneling current through the junction. Quantitative analysis revealed that the polymer junction exhibits a higher formation probability and longer lifetime than its monomer counterpart. These results suggest that the polymer provides a unique opportunity to design both stable and highly functional molecular devices for nanoelectronics. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
33. THE INTEGRATION OF A MATERIAL STRUCTURE WITH SENSORS AND EFFECTORS - FROM THEORY TO TECHNOLOGY.
- Author
-
LIPSKI, Stanisław and BETIUK, Marek
- Subjects
INTELLIGENT sensors ,NANOTECHNOLOGY ,ENTROPY ,SMART materials ,DESIGN - Abstract
Copyright of Journal of Machine Construction & Maintenance is the property of Institute for Sustainable Technologies - National Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
34. On the Things to Come: Philosophical Anthropology.
- Author
-
Birx, H. James and Milićević, Branko
- Subjects
PHILOSOPHICAL anthropology ,TRANSHUMANISM ,HOMINIDS ,HUMAN beings ,TELEOLOGY ,BIOENGINEERING ,WORLDVIEW - Abstract
Copyright of Anthropologia Integra is the property of Masaryk University, Department of Anthropology, Faculty of Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2019
35. Accordion‐Like Motion in Electrochemically Switchable Crown Ether/Ammonium Oligorotaxanes.
- Author
-
Schröder, Hendrik V., Stein, Felix, Wollschläger, Jan M., Sobottka, Sebastian, Gaedke, Marius, Sarkar, Biprajit, and Schalley, Christoph A.
- Subjects
- *
ROTAXANES , *CROWN ethers , *OXIDATION-reduction reaction , *TETRATHIAFULVALENE , *RADICAL cations - Abstract
Reversible oxidation reactions in electrochemically switchable oligorotaxanes with tetrathiafulvalene (TTF) decorated 24‐crown‐8 ether wheels generate intramolecular mixed‐valence and radical‐cation interactions between the wheels. This induces shuttling of the wheels and a contraction of inter‐wheel distances. Further oxidation generates repulsive forces between the TTFs and maximizes the inter‐wheel distances instead. These interactions and co‐conformational changes were not observed for structurally similar controls in which acetyl groups along the axle prevent translational motion of the wheels. This operation mode of oligorotaxanes, which is reminiscent of an accordion‐like motion, is promising for functional materials and nanodevices such as piston‐type rotaxane motors. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
36. Atmospheric Pressure Dry Nanotexturing for Crystalline Silicon PERC Solar Cells
- Author
-
Ridoy, Ahmed Ismail
- Subjects
PERC-Solarzellen ,Solarenergie ,Plasmalose Trockenätzung ,Erneuerbare Energie ,Nanotechnologie ,Silizium-Photovoltaik ,DDC::600 Technik, Medizin, angewandte Wissenschaften::620 Ingenieurwissenschaften::621 Angewandte Physik - Abstract
The state-of-the-art industrial fabrication of silicon solar cells requires significant handling of wet processes and large amounts of wet chemicals. On the other hand, dry etching processes mostly require plasma and vacuum sources as well as use of process gases with high global warming potentials (GWP). In this work, an alternative plasma-free and mask-less dry etching technique of single-sided in nature is investigated. This novel dry etch process uses fluorine (F2), a low to zero GWP gas as etchant, diluted at atmospheric pressure condition to facilitate nanoscale texture of monocrystalline silicon (mono-Si). The etched surface morphology is optimized in terms of surface roughness or enlargement and surface reflection followed by the optimization of phosphorus oxychloride (POCl3) based n-type emitter diffusion and front surface passivation. Such optimization enables improved emitter homogeneity with minimum standard deviation of 3% and front passivation with just silicon nitride (SiNx) by plasma-enhanced chemical vapor deposition. Altogether this optimized nanotexture-emitter combination is integrated into the inline fabrication of the passivated emitter and rear solar cell or PERC-architecture allowing improved energy conversion and increased cell efficiency up to an absolute 0.6%.
- Published
- 2023
- Full Text
- View/download PDF
37. SimplyNano-Experimentierkoffer und die Plattform Swiss Nano-Cube
- Author
-
Thomas Flüeler
- Subjects
Ausbildung ,Nanotechnologie ,Simplyscience ,Swiss nano-cube ,Chemistry ,QD1-999 - Abstract
Die Experimentierkoffer SimplyNano 1 und 2 wurden von der Innovationsgesellschaft mbH entwickelt und von der SimplyScience Stiftung herausgegeben. Sie enthalten Unterrichtsunterlagen für die Erklärung und Vorstellung einfacher Phänomene der Nanotechnologie. Es stehen Schüleranleitungen, Kommentare für Lehrpersonen und Vortragsfolien zur Verfügung. Weiterführende Unterlagen und Ideen zu Nanotechnologie im Unterricht bietet die Plattform Swiss Nano-Cube.
- Published
- 2018
- Full Text
- View/download PDF
38. Dynamic-covalent nanosystems : from molecular codes to responsive polymeric materials
- Author
-
Hebel, Marco, Weil, Tanja, and Streb, Carsten
- Subjects
Biopolymere ,DDC 540 / Chemistry & allied sciences ,FOS: Nanotechnology ,Biopolymer ,Dynamic-covalent ,Nanobiotechnology ,Functional material ,Biopolymers ,ddc:540 ,Bionanotechnology ,Nanotechnology ,Molecular recognition ,Molecular codes ,Nanotechnologie ,Molekulare Erkennung - Abstract
Dynamic-covalent nanosystems are applied as an approach to controllable self-organizing units. The robust but reversible nature of the dynamic-covalent bond imparts molecular recognition units for controlled self-assembly and stimulus-induced disassembly. In contrast to supramolecular interactions showing fast dynamics in the assembly and disassembly events the self-organizing features, dynamic-covalent systems are more challenging to control and there is much less information available. However, by exploiting the delicate balance between weak binding with high dynamics, and strong binding providing high stability of the formed bonds, the dynamic covalent materials reported herein provide many attractive features for i.e. drug delivery applications. In the first system of my thesis, dynamic covalent tags were prepared and optimized for the multivalent binding of boronic acid (BA) with catechols (CA). BA or CA residues are arranged by “coding” sequence recognition and controlled defect engineering with different dynamic-covalent binding oligomers. The pH was applied as an external stimulus inducing binding and release. In addition, the sequence recognition was demonstrated at the macromolecular level by conjugating the cytochrome c protein to a polyethylene glycol chain in a site-directed approach by dynamic covalent sequence recognition. Besides macromolecular conjugation, dynamic-covalent chemistry was also applied for the generation of stimulus-responsive materials. In this thesis, the reversible iron(III)-catechol interaction allowed pH-responsive binding and intramolecular folding of a polymer chain based on denatured human serum albumin. In this way, nanoparticles were formed by single chain folding, inspired by nature’s protein folding events. By rising the iron(III) concentration, intermolecular crosslinking dominates, resulting in stimuli-responsive and self-healing, rapid-gelating macroscopic hydrogels with a wide range of controllable mechanics. In combination with high adaptability, such characteristics provide attractive opportunities for tissue engineering. Based on the controlled interaction of stimuli-responsive dynamic covalent linkages, foldable macromolecular nanoparticles and smart macroscopic materials have been developed. The third dynamic system presented in my PhD thesis is based on a supramolecular tweezer-like molecule, which influences the macromolecular aggregation of peptide fibers and the nanoscopic structure of lipid membranes. In the investigation of the underlying mechanism, optimized tweezer molecules could serve as antiviral compounds against enveloped viruses. In these three systems, molecular design of dynamic covalent or supramolecular interactions allowed to control binding and disassembly events at the molecular level, which determines the resulting materials properties from the molecular to the macroscopic scale.
- Published
- 2022
39. DNA Surface Technology: From Gene Sensors to Integrated Systems for Life and Materials Sciences.
- Author
-
Schneider, Ann‐Kathrin and Niemeyer, Christof M.
- Subjects
- *
SURFACES (Technology) , *CHEMICAL detectors , *MATERIALS science , *DNA microarrays , *LYSINE - Abstract
The evolution of DNA microarray technology has led to sophisticated DNA chips that are being used as routine tools for fundamental and applied genome research such as genotyping and expression profiling. Owing to their capability for highly parallel, site‐directed immobilization of complementary nucleic acids through canonical Watson–Crick base‐pairing, however, DNA‐modified surfaces can also be used for the assembly of complex surface architectures comprised of non‐nucleic acid compounds, such as proteins or colloidal materials. Furthermore, implementation of functional DNA devices and structural DNA nanotechnology can unlock the full potential of DNA surfaces. Based on case studies from diagnostics, sensing, proteome research, cell adhesion, and cell signaling, we show how classical gene sensors have developed into modern integrated systems and platforms for various applications in life sciences and materials research. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
40. Surface‐Enhanced Raman Spectroscopy for the Detection of a Metabolic Product in the Headspace Above Live Bacterial Cultures.
- Author
-
Kelly, Jessica, Patrick, Robin, Patrick, Sheila, and Bell, Steven E. J.
- Subjects
- *
RAMAN spectroscopy , *PATHOGENIC bacteria , *ANTIBIOTICS , *GOLD nanoparticles , *GRAM-positive bacteria - Abstract
In situ surface‐enhanced Raman spectra of the headspace above cultures of six bacterial species showed strong characteristic bands from chemisorbed methyl sulfide. This marker compound is created by dissociation of dimethyl disulfide (DMDS), a fermentative metabolite of bacteria, on the surface of the enhancing Au or Ag nanoparticle films. Kinetic binding plots of media spiked with DMDS and of live cultures showed that the Au‐based substrates were more suitable for the rapid detection of bacteria than Ag‐based substrates. For E. coli DH5α, the sensitivity limit for headspace SERS detection was 1.5×107 CFU mL−1, which corresponded to detection 15 min after inoculation of the growth medium. Since the metabolites are only produced by viable bacteria, antibiotic (gentamicin) treatment stopped the normal signal growth of the marker peak. This work is a promising step towards rapid bedside detection of bacterial infections and rapid screening of antibiotics against bacteria. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
41. Gold aus Elektronikschrott.
- Author
-
Wilke, Timm, Bodensiek, Oliver, and Ruppersberg, Klaus
- Abstract
Summary Experiments with gold nanoparticles can often not be carried out at school, since the required precursors containing gold are too expensive. The following article presents a practicable solution for the processing of gold‐bearing electronic waste, which is often disposed of carelessly with residual waste even in schools. The gold acid obtained herein is used for the synthesis of the gold nanoparticles mentioned. In addition to the series of experiments, critical approaches concerning improper recycling in parts of the Third World and the high material values, which are wasted unnoticed in our society, are discussed in class. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
42. Intermolecular Arrangement of Fullerene Acceptors Proximal to Semiconducting Polymers in Mixed Bulk Heterojunctions.
- Author
-
Wang, Chao, Nakano, Kyohei, Lee, Hsiao Fang, Chen, Yujiao, Hong, You‐Lee, Nishiyama, Yusuke, and Tajima, Keisuke
- Subjects
- *
FULLERENES , *SEMICONDUCTORS , *CONDUCTING polymers , *INTERMOLECULAR interactions , *HETEROJUNCTIONS , *ELECTRON donors , *INTERFACES (Physical sciences) - Abstract
Abstract: Precise control of the molecular arrangements at the interface between the electron donor and acceptor in mixed bulk heterojunctions (BHJs) remains challenging, despite the correlation between structural characteristics and efficiency in organic photovoltaics (OPVs). This study reveals that the substitution patterns of linear and branched alkyl side chains on electron‐donating/‐accepting alternating copolymers can control the positions of an acceptor molecule (C60) around the π‐conjugated main chains in mixed BHJs. Two‐dimensional solid‐state NMR demonstrates a marked difference in the location of C60 in the blend films. A copolymer with an electron‐accepting unit positioned in close proximity to C60 demonstrated higher OPV performance in combination with various fullerene derivatives. This molecular design offers precise control over the interfacial molecular structure, thereby paving the way for overcoming the current limitations of OPVs comprising mixed BHJs. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
43. Customizing the Electrochemical Properties of Carbon Nanodots by Using Quinones in Bottom‐Up Synthesis.
- Author
-
Rigodanza, Francesco, Đorđević, Luka, Arcudi, Francesca, and Prato, Maurizio
- Subjects
- *
NANOSTRUCTURED materials , *QUINONE , *ELECTROACTIVE substances , *CHEMICAL precursors , *PHOTOCATALYSIS - Abstract
Abstract: We show how the redox potentials of carbon nanodots (CNDs) can be modulated by employing quinones as electroactive precursors during a microwave‐assisted synthesis. We prepared and characterized a redox library of CNDs, demonstrating that this approach can promote the use of carbon nanodots for ad hoc applications, including photocatalysis. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
44. Sensortechnologien durch neuartige Materialien und Moleküle.
- Author
-
Swager, Timothy M.
- Abstract
Abstract: Viele moderne Technologien und insbesondere die molekulare Sensorik beruhen auf Innovationen im Design neuer Moleküle. Das Design neuartiger, molekularer Sensoren ist erforderlich, um chemische und biologische Signale zu erfassen und somit kostengünstige, allgegenwärtige Chemosensoren zu entwickeln. Wir sind für viele neue Innovationen bereit, um neue Generationen von Sensortechnologien zu realisieren. Heutige Hardware zu erweitern, deren Kosten zu senken und eine breite Implementierung molekularer Sensorik sicherzustellen, ist nur mithilfe dieser neuartigen Materialien und Moleküle möglich. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
45. Nanotechnologie. Technologiehype und Demokratisierungsbemühungen.
- Author
-
Seifert, Franz
- Abstract
Copyright of SWS - Rundschau is the property of Verein fur interdisziplinare sozialwissenschaftliche Studien und Analysen and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
46. Disassembly of Multicompartment Polymer Micelles in Spatial Sequence Using an Electrostatic Field and Its Application for Release in Chronological Order.
- Author
-
Wu, Ming, Zhu, Yutian, and Jiang, Wei
- Subjects
- *
ELECTROSTATIC fields , *POLYETHYLENE oxide , *FLUORESCEIN , *ISOTHIOCYANATES , *MITOXANTRONE - Abstract
Abstract: Multicompartment micelles (MCPs), comprising sequences of repeated elemental discoid parts connected by fasciculus, were formed by self‐assembly of polystyrene‐
block ‐poly(2‐vinyl pyridine)‐block ‐poly(ethylene oxide). Using an electrostatic field, the MCPs can be disassembled through consequent release of small spherical micelles. During this disassembly process, release of loaded species can be achieved from the micelles in chronological order. Two location‐selected cargos (mitoxantrone (MTNT) and fluorescein isothiocyanate (FITC)) in the outer and inner compartments of the micelles can be released in chronological order. Under the applied electrostatic field (intensity: 16 kV cm−1), the loaded MTNT was rapidly released with more than 80 % release, whereas the loaded FITC was slowly released with less than 20 % release in 12 h. At a later stage (after more than 12 h), the loaded MTNT was slowly released with less than 20 % release, while the loaded FITC was rapidly released with more than 80 % release. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
47. Doketisch, pelagianisch, sarkisch?
- Author
-
Wirth, Mathias
- Subjects
- *
CIVIL society , *RELIGION , *CHRISTIANITY - Abstract
Der menschliche Körper ist auffällig mit der Aufforderung zur Veränderung und Überschreitung eines vorgefundenen Zustands verbunden. Die Plastizität des Körpers erlaubt dabei ein gehöriges Quantum Transition. Der Transhumanismus, eine neuere philosophisch-naturwissenschaftliche Bewegung, antwortet entsprechend auf die Grundfrage der Anthropologie mit dem Hinweis auf diese Überschreitungspotentiale und auf die Grundfrage der Ethik mit einem Imperativ zur akzelerierten technischen Verbesserung menschlicher Körper. Auf die Frage nach der Methode antwortet der Transhumanismus unter anderem mit Verweis auf Nanotechnologien und die Vorstellung nanokleiner Werkzeuge, mit deren Hilfe die Materie auf Zellebene kontrolliert werden soll. Zwar ist das Thema Transhumanismus in der theologischen Debatte bisher wenig vorgekommen, allerdings werden einzelne Aspekte transhumaner Visionen diskutiert. Einige aktuelle theologische Stellungnahmen, überwiegend katholischer Provenienz, immunisieren sich gegen ein konstruktives Gespräch mit dem Transhumanismus, in dem Ketzerhüter verteilt und invasive Körpermodifikationen als Neuauflage klassischer Häresien aufgefasst werden. In komparativer Perspektive ist aber ein Zugang innerhalb der Theologie denkbar, der zwar nicht jede invasive Körpermodifikation vorschnell begrüßen, aber auch nicht exorzieren muss. Die Hoffnung auf Fortschritt animiert einen Konnex zwischen Theologie und Transhumanismus, wobei auch erhebliche technische Modifikationen dazu beitragen könnten, menschliche Körper-Wünsche nicht allein auf eine gedachte Zukunft bei Gott zu beziehen. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
48. Selective Nascent Polymer Catch‐and‐Release Enables Scalable Isolation of Multi‐Kilobase Single‐Stranded DNA.
- Author
-
Krieg, Elisha and Shih, William M.
- Subjects
- *
BIOTECHNOLOGY , *BIOMOLECULE analysis , *ADSORPTION (Chemistry) , *SUBSTRATES (Materials science) , *ACRYLAMIDE , *NANOTECHNOLOGY - Abstract
Abstract: Scalable methods currently are lacking for isolation of long ssDNA, an important material for numerous biotechnological applications. Conventional biomolecule purification strategies achieve target capture using solid supports, which are limited in scale and susceptible to contamination owing to nonspecific adsorption and desorption on the substrate surface. We herein disclose selective nascent polymer catch and release (SNAPCAR), a method that utilizes the reactivity of growing poly(acrylamide‐co‐acrylate) chains to capture acrylamide‐labeled molecules in free solution. The copolymer acts as a stimuli‐responsive anchor that can be precipitated on demand to pull down the target from solution. SNAPCAR enabled scalable isolation of multi‐kilobase ssDNA with high purity and 50–70 % yield. The ssDNA products were used to fold various DNA origami. SNAPCAR‐produced ssDNA will expand the scope of applications in nanotechnology, gene editing, and DNA library construction. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
49. Nachhaltigkeitspotenziale und Risiken von Nanotechnologien — Erkenntnisse aus der Prospektiven Technikbewertung und Ansätze zur Gestaltung
- Author
-
von Gleich, A., Petschow, U., Steinfeldt, M., Gazsó, André, editor, Greßler, Sabine, editor, and Schiemer, Fritz, editor
- Published
- 2007
- Full Text
- View/download PDF
50. Nanotechnologie — Wissenschaftliche Basis und Gesellschaftliche Folgen
- Author
-
Grunwald, A., Fleischer, T., Gazsó, André, editor, Greßler, Sabine, editor, and Schiemer, Fritz, editor
- Published
- 2007
- Full Text
- View/download PDF
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