Bibliografie tematiche / Systeme chemistry

Letteratura scientifica selezionata sul tema "Systeme chemistry"

Autore: Grafiati

Pubblicato: 25 maggio 2024

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Articoli di riviste sul tema "Systeme chemistry":

Scheffer, F. E. C., e J. Smittenberg. "Über Binäre Systeme. IV. Äthan-Systeme (Fortsetzung)". Recueil des Travaux Chimiques des Pays-Bas 52, n. 11 (3 settembre 2010): 982–86. http://dx.doi.org/10.1002/recl.19330521112.

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Gutmann, Viktor, e Gerhard Resch. "Molekulare Systeme". Zeitschrift für Chemie 19, n. 11 (31 agosto 2010): 406–12. http://dx.doi.org/10.1002/zfch.19790191103.

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Gr�ndler, Wolfgang. "Polycyclische benzenoide Systeme". Monatshefte f�r Chemie Chemical Monthly 119, n. 10 (ottobre 1988): 1125–41. http://dx.doi.org/10.1007/bf00809265.

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Scheffer, F. E. C., e J. Smittenberg. "Über Binäre Systeme. III. Einige Systeme mit Äthan als flüchtigerer Komponente". Recueil des Travaux Chimiques des Pays-Bas 52, n. 7 (3 settembre 2010): 607–14. http://dx.doi.org/10.1002/recl.19330520710.

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Ewers, C. "Modulare Systeme". Chemie Ingenieur Technik 81, n. 8 (agosto 2009): 1236. http://dx.doi.org/10.1002/cite.200990080.

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Mayer, Roland, Horst Hartmann, Jürgen Fabian e Achim Mehlhorn. "Schwefelhaltige 6-π-Systeme". Zeitschrift für Chemie 7, n. 6 (2 settembre 2010): 209–16. http://dx.doi.org/10.1002/zfch.19670070602.

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Hoffmann, Siegfried, Werner Witkowski e Hermann Schubert. "Nucleinsäuremodelle; 2-Pyridon-Systeme". Zeitschrift für Chemie 14, n. 4 (1 settembre 2010): 154. http://dx.doi.org/10.1002/zfch.19740140409.

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Hellwinkel, Dieter, e Helmut Fritsch. "Phenylvinylog erweiterte Triphenylmethylium-Systeme". Chemische Berichte 122, n. 12 (dicembre 1989): 2351–59. http://dx.doi.org/10.1002/cber.19891221223.

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Hellwinkel, Dieter, e Helmut Fritsch. "Phenylazo-substituierte Triphenylmethylium-Systeme". Chemische Berichte 123, n. 11 (novembre 1990): 2207–26. http://dx.doi.org/10.1002/cber.19901231120.

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Thoss, Michael. "Quantendynamik komplexer Systeme". Nachrichten aus der Chemie 56, n. 3 (marzo 2008): 327–30. http://dx.doi.org/10.1002/nadc.200853307.

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Più fonti

Tesi sul tema "Systeme chemistry":

Labidi, Olfa. "RELATIONS STRUCTURES-PROPRIETES DANS LE SYSTEME Bi2O3-PbO-V2O5 : SURSTRUCTURES, POLYMORPHISME, INCOMMENSURABILITE et CONDUCTIVITE". Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2006. http://tel.archives-ouvertes.fr/tel-00199221.

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Abstract (sommario):

Ce travail concerne la recherche de nouveaux matériaux à base de bismuth à propriétés spécifiques plus performantes, ou l'amélioration de propriétés de matériaux connus telles que la conduction ionique pour leur intérêt, en particulier dans le domaine énergétique. Dans le système Bi2O3-PbO-V2O5, notre travail a porté tout d'abord sur le domaine riche en bismuth. La structure du composé PbBi6V2O15 a été déterminée. Le problème de discernement par diffraction X de Bi3+ et de Pb2+ a été abordé par le remplacement du plomb par d'autres cations M2+ tels que Sr2+, Ca2+ et Cd2+. Les déterminations structurales sur monocristaux ont révélé des solutions solides. Partant de la structure connue Pb5Bi18V4O42, le remplacement du Pb par Sr, Ca et Cd a abouti à de nouvelles phases cristallines non stoechiométriques. Il s'agit dans ces différents cas de surstructures dérivées de Bi2O3-δ.
L'étude s'est prolongée au sein du binaire BiVO4-nPbO. Une transition de phase α→β a été caractérisée pour le terme n=1, PbBiVO5. Les structures des cristaux «maclés» ont été résolues à l'ambiante et à 530°C. PbBiPO5 subit une transition analogue. PbBiAsO5 cristallise dès l'ambiante dans la forme β.
Pb2BiVO6 (n=2) subit plusieurs transitions structurales α, β et δ. Les structures des formes α et β ont été déterminées sur monocristal ; la résolution de la structure de β a nécessité l'emploi d'un formalisme 4D. Deux nouvelles formes α' et δ' ont été obtenues par substitution du V par Mn ou P. Leurs structures découlent des phases α à l'ambiante, et δ à 680°C. La conductivité électrique des matériaux a été étudiée et des corrélations propriétés de conduction - caractéristiques structurales proposées.

Chaghi, Radhouane. "ETUDE DE LA SOLUBILISATION DES PRODUITS ORGANIQUES A FAIBLE MASSE MOLECULAIRE DANS UN SYSTEME MICELLAIRE". Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2007. http://tel.archives-ouvertes.fr/tel-00196348.

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Le but de ce travail est la compréhension du mécanisme de la solubilisation micellaire de molécules organiques modèle de faible masse moléculaire et d'une solubilité limitée dans l'eau. Les interactions entre ces molécules organiques
(Phénol, butanol, heptanol et acide heptanoïque) et les micelles du tensioactif cationique le bromure d'hexadécyltriméthylammonium (CTAB) au voisinage de la concentration micellaire critique et à de faibles concentrations en solutés ont été caractérisées avec différentes techniques expérimentales : La RMN du 1H, la microcalorimétrie de titration, la conductivité spécifique et la spectroscopie UV. La localisation et l'orientation des solutés modèle dans la micelle ont été déterminées.
La solubilisation de ces molécules dans un système micellaire varie selon la composition du mélange. En effet, les interactions tensioactif-soluté, qui sont très faibles et difficiles à détecter, nécessitent pour être étudiées des techniques expérimentales sensibles et précises (RMN 1H et microcalorimétrie de titration).
L'exploitation des résultats obtenus a fourni des indications sur la localisation et l'orientation du Phénol à l'intérieur de la micelle. Ces résultats confirment que le Phénol, pour de faibles molalités, se solubilise principalement dans la couronne micellaire et la couche de palissade. A cause de l'aspect compétitif entre le Phénol, le NaBr et les alcools résulte que à faibles molalités en solutés, le Phénol est contraint à quitter la micelle. Le butanol et l'acide favorisent la solubilisation du Phénol dans le coeur de la micelle.

Olivieri, Enzo. "Application de la catalyse pour l'alimentation de systèmes chimiques sans déchet". Electronic Thesis or Diss., Aix-Marseille, 2021. http://theses.univ-amu.fr.lama.univ-amu.fr/211216_OLIVIERI_825ir382ikksw374agndg983uvnl_TH.pdf.

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Au cours de cette thèse nous avons pris avantage de la catalyse pour le développement de nouveaux carburants, limitant l’accumulation de déchets lors de l’activation sélective de nouveaux systèmes chimiques. Dans une première partie, nous avons transposé le principe de réactions d’hydrogénations réversibles au domaine des machines moléculaires. Cette approche a permis l’élaboration d’un interrupteur moléculaire de type tolane fonctionnant lors de deux cycles consécutifs de dés/hydrogénation. Celui-ci représente le premier système alimenté par carburant chimique sans aucune production de déchet. Nous avons aussi étendu l’utilisation de l’acide trichloracétique (TCA), pour le développement de nouveaux systèmes d’autoassemblages et notamment d’organogels contrôlés dans le temps. Ainsi à partir d’un dérivé d’aminoacide naturel (O-tert-Butyl-L-tyrosine), nous avons pu mettre au point deux systèmes complémentaires permettant une transition gel-sol-gel ou sol-gel-sol. Nous avons ainsi pu réaliser 11 cycles gel-sol-gel consécutifs, et plus 25 cycles sol-gel-sol consécutifs avant de devoir régénérer le système par une simple évaporation. Cette stratégie a pu être étendue à l’octadécylamine avec laquelle nous avons réalisés 12 cycles gel-sol-gel consécutifs. Il est important de noter que les deux systèmes gel-sol-gel et sol-gel-sol à base de O-tert-Butyl-L-tyrosine, possèdent des propriétés chiroptiques uniques. Finalement, nous nous sommes attelés au développement de systèmes hybrides capables de répondre à deux stimuli différents, l’hydrogène et le TCA. Basés sur des squelettes de type phénanthridines, ils permettent une rotation contrôlée en réponse à ces deux types de stimuli
In this thesis we have taken advantage of catalysis for the development of new fuels, limiting the accumulation of waste during the selective activation of new chemical systems. In a first part, we transposed the principle of reversible hydrogenation reactions to the field of molecular machines. This approach has allowed the development of a tolane-type molecular switch operating during two consecutive de/hydrogenation cycles. This represents the first system powered by chemical fuel without any waste production. We have also extended the use of trichloroacetic acid (TCA), for the development of new self-assembly systems and in particular time-controlled organogels. Thus, starting from a natural amino acid derivative (O-tert-Butyl-L-tyrosine), we were able to develop two complementary systems allowing a gel-sol-gel or sol-gel-sol transition. We were able to perform 11 consecutive gel-sol-gel cycles, and more than 25 consecutive sol-gel-sol cycles before having to regenerate the system by simple evaporation. This strategy could be extended to octadecylamine with which we performed 12 consecutive gel-sol-gel cycles. It is important to note that both gel-sol-gel and sol-gel-sol systems based on O-tert-Butyl-L-tyrosine, have unique chiroptical properties. Finally, we set out to develop hybrid systems capable of responding to two different stimuli, hydrogen and TCA. Based on phenanthridine backbones, they allow a controlled rotation in response to these two types of stimuli

Zavoiura, Oleksandr. "Quantum Dot-basierte FRET Systeme zur Templat-vermittelten Detektion von RNA". Doctoral thesis, Humboldt-Universität zu Berlin, 2018. http://dx.doi.org/10.18452/19614.

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Die Detektion von Nukleinsäuren ist eine der am häufigsten verwendeten Methoden zur Erkennung von viralen und bakteriellen Spezies in biologischen Proben. Oligonukleotid-vermittelte Reaktionen (OVR), die die Zielsequenz als Katalysator der chemischen Reaktion zwischen reaktiven Sonden verwenden, bieten gegenüber den enzymatischen Methoden viele Vorteile, wie z.B. Simplizität und Kosteneffizienz. Normalerweise besitzt das Produkt der OVR deutliche fluoreszierende Eigenschaften, die durch Fluoreszenzspektroskopie gemessen werden können. Die Haupteinschränkung solcher Systeme ist die nur moderate Helligkeit von organischen Farbstoffen, die meistens zur Markierung von reaktiven Sonden genutzt werden. Um dieses Problem zu lösen, sind Fluorophore mit höherer Helligkeit erforderlich. Die vorliegende Arbeit beschreibt die Entwicklung einer Methode zur Detektion von RNA durch Templat-vermittelten Transfer des Fluorophors auf den Quantum Dot (QD). Das System besteht aus zwei reaktiven Peptide Nucleic Acid (PNA)-basierten Antisense-Sonden. Die Label Akzeptor PNA (LAPNA) Sonde ist auf dem QD immobilisiert und enthält eine Cysteineinheit am N-terminus. Die Label Donor PNA (LDPNA) Sonde trägt eine Cy5-Einheit, die als Thioester gebunden ist. Durch die benachbarte Hybridisierung der Sonden am RNA-Templat nimmt die effektive Molarität der reaktiven Gruppen zu, und führt somit durch das Prinzip von Native Chemical Ligation zum Transfer des Cy5 auf den QD. Dies resultiert in Förster−Resonanzenergietransfer (FRET) zwischen dem QD und den Cy5-Molekülen, der durch die Löschung der Emission des QDs sowie die Verstärkung der Fluoreszenz des Cy5 beobachtet werden kann. Die Verwendung von sehr hellen QDs als FRET-Donor ermöglicht die Umsetzung von Sonden bei geringen Konzentrationen und ermöglicht die Erkennung von RNA mit Nachweisgrenzen im Bereich von weniger pikomolar.
Detection of nucleic acids is one of the most reliable methods for the identification of bacterial and viral species in biological samples. Oligonucleotide-templated reactions (OTRs) that exploit an RNA or DNA target to catalyze a chemical reaction hold great promise for the development of enzyme-free and low-cost detection schemes. Commonly, these strategies rely on organic dyes and are designed so that the product of OTR exhibits distinct fluorogenic properties. The main constraint of such schemes is the moderate brightness of organic fluorophores, which limits the read-out when the probes are used at low concentrations. To tackle this obstacle, significantly brighter fluorophores are needed. This work describes the development of an RNA detection scheme that relies on target-templated fluorophore transfer onto a semiconductor quantum dot (QD). The approach uses two reactive peptide nucleic acid (PNA) antisense probes. Label acceptor peptide nucleic acid (LAPNA) probe is immobilized on a QD and bears a cysteine at the N-terminus; label donor peptide nucleic acid (LDPNA) probe is equipped with a Cy5 dye, attached as a thioester. The adjacent annealing of these recognition elements following binding to target RNA triggers the transfer of Cy5 onto a QD in a native chemical ligation manner. This leads to a detectable fluorescence signal brought about by FRET from QD to the Cy5. The use of unprecedentedly bright QDs that can act as FRET donors for several Cy5 functionalities allows application of probes at very low concentrations (pM range) and achieves enhanced sensitivity of target-templated RNA detection. The method enabled RNA detection in the low pM range using a conventional microtiter plate reader.

Haefner, Sebastian, Philipp Frank, Martin Elstner, Johannes Nowak, Stefan Odenbach e Andreas Richter. "Smart hydrogels as storage elements with dispensing functionality in discontinuous microfluidic systems". Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-222778.

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Smart hydrogels are useful elements in microfluidic systems because they respond to environmental stimuli and are capable of storing reagents. We present here a concept of using hydrogels (poly(N-isopropylacrylamide)) as an interface between continuous and discontinuous microfluidics. Their swelling and shrinking capabilities allow them to act as storage elements for reagents absorbed in the swelling process. When the swollen hydrogel collapses in an oil-filled channel, the incorporated water and molecules are expelled from the hydrogel and form a water reservoir. Water-in-oil droplets can be released from the reservoir generating different sized droplets depending on the flow regime at various oil flow rates (dispensing functionality). Different hydrogel sizes and microfluidic structures are discussed in terms of their storage and droplet formation capabilities. The time behaviour of the hydrogel element is investigated by dynamic swelling experiments and computational fluid dynamics simulations. By precise temperature control, the device acts as an active droplet generator and converts continuous to discontinuous flows.

Kahle, Ingolf. "Wirt-Gast-Systeme - optische Eigenschaften von Farbstoffen und Metall-Nanopartikel in mikro- und mesoporösen Alumosilikaten". Doctoral thesis, Universitätsbibliothek Chemnitz, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-149319.

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Die vorliegende Arbeit beinhaltet die Synthese neuartiger Hybridmaterialien basierend auf der Einlagerung optischer Materialien, wie Farbstoffmoleküle und Metallnanopartikel, in anorganische Wirtsmaterialien mit definierten Porenstrukturen. Hierfür wurden mikro- und mesoporöse alumosilikatische Verbindungen, wie z.B. Zeolithe und Vertreter aus der Familie der sogenannten „Mobile Composition of Matter“ (MCM), verwendet. Mit Hilfe dieses Konzeptes konnte z.B. der Einfluss der Wirtsmaterialien hinsichtlich ihrer Porengrößen und inneren Polarität auf die optischen Eigenschaften von photochromen Naphthopyranfarbstoffen untersucht werden. Neue photochrome Kompositmaterialien, welche sich durch einfache industrielle Prozesse, wie z.B. der Extrusion in eine Polymermatrix, weiterverarbeiten lassen, wurden auf diesem Wege synthetisiert. Durch die Einkapselung eines solvatochromen Spiropyranderivats innerhalb der Superkäfige von Faujasiten konnten Rückschlüsse auf die Polaritätsparameter der äußeren und inneren Oberfläche der Molekularsiebe gewonnen werden. Zudem wurde ein neues Synthesekonzept zur Herstellung fluoreszierender Silbernanopartikel innerhalb eines Zeolith Y entwickelt, um auf sehr einfachem Weg ein stabiles Material mit interessanten Fluoreszenzeigenschaften zu erhalten. Der Einfluss der Wirtsoberfläche auf fluoreszierende Farbstoffe wurde des Weiteren an Benzylidenketonfarbstoffen untersucht, die mittels „Ship in a Bottle reaction“ in Zeolith Y eingekapselt wurden. Um das Konzept zur Synthese optischer Effektpigmente zu erweitern, wurden neue photochrome Naphthopyrane, welche in Konjugation zu fluoreszierenden Farbstoffen stehen, synthetisiert und untersucht.

Haefner, Sebastian, Philipp Frank, Martin Elstner, Johannes Nowak, Stefan Odenbach e Andreas Richter. "Smart hydrogels as storage elements with dispensing functionality in discontinuous microfluidic systems". Royal Society of Chemistry, 2016. https://tud.qucosa.de/id/qucosa%3A30257.

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Duchesne, Claire. "Etude des proprietes optiques non lineaires dans les verres. Cas du systeme NA2O-TIO2-P2O5". Phd thesis, Université Sciences et Technologies - Bordeaux I, 1993. http://tel.archives-ouvertes.fr/tel-00136123.

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L' acces aux proprietes optiques non lineaires de materiaux tels que les verres mineraux ouvre de nouvelles perspectives dans le domaine du transport de l' information par fibre optique, voire dans celui de la commutation optique fonctionnant avec des temps de reponse tres brefs (domaine de la subpicoseconde). Concretement, leur potentialite peut etre estimee par une figure de merite F, expression d' un compromis qui doit etre trouve entre la necessite d' accroitre la vitesse et l' amplitude de changement d' indice de refraction et l' obligation d' attenuer la variation thermique de l' indice due a l' echauffement du materiau que provoque l' intensite du faisceau lumineux. Une analyse des criteres de choix des materiaux nous a conduit a centrer cette premiere etude sur des verres du systeme Na2O-TiO2-P2O5. Les resultats peuvent s' analyser en terme de reconnaissance des entites structurales se formant dans les verres et de performances obtenues sur le plan des non linearites optiques: l' analyse structurale des verres effectuee essentiellement par spectroscopie d' absorption des rayons X a conduit a l' identification des entites hyperpolarisables a l' origine des proprietes non lineaires, a savoir les groupements TiO5; les valeurs des indices non lineaires se situent un peu au-dessous de celles des verres contenant des ions lourds. En revanche, l' absence de tels constituants a permis d' accroitre considerablement les facteurs de merite. De ce point de vue, ces phosphates se placent sans doute en tete par rapport a tous les resultats publies a ce jour. Enfin, la pertinence des valeurs experimentales des indices lineaires et non lineaires a pu etre mise en evidence par une tentative de modelisation. Cette approche repose sur le modele de M. E. Lines qui a decrit la reponse electronique d' un cristal sous l' effet d' une perturbation electromagnetique en terme de processus interionique par une analyse de la liaison anion-cation.

Sato, Hiroki. "Chemistry /". Online version of thesis, 2008. http://hdl.handle.net/1850/7747.

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Kristen, Juliane Ute. "Amphiphilic BAB-triblock copolymers bearing fluorocarbon groups : synthesis and self-organization in aqueous media". Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2012/6178/.

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In this work new fluorinated and non-fluorinated mono- and bifunctional trithiocarbonates of the structure Z-C(=S)-S-R and Z-C(=S)-S-R-S-C(=S)-Z were synthesized for the use as chain transfer agents (CTAs) in the RAFT-process. All newly synthesized CTAs were tested for their efficiency to moderate the free radical polymerization process by polymerizing styrene (M3). Besides characterization of the homopolymers by GPC measurements, end- group analysis of the synthesized block copolymers via 1H-, 19F-NMR, and in some cases also UV-vis spectroscopy, were performed attaching suitable fluorinated moieties to the Z- and/or R-groups of the CTAs. Symmetric triblock copolymers of type BAB and non-symmetric fluorine end- capped polymers were accessible using the RAFT process in just two or one polymerization step. In particular, the RAFT-process enabled the controlled polymerization of hydrophilic monomers such as N-isopropylacrylamide (NIPAM) (M1) as well as N-acryloylpyrrolidine (NAP) (M2) for the A-blocks and of the hydrophobic monomers styrene (M3), 2-fluorostyrene (M4), 3-fluorostyrene (M5), 4-fluorostyrene (M6) and 2,3,4,5,6-pentafluorostyrene (M7) for the B-blocks. The properties of the BAB-triblock copolymers were investigated in dilute, concentrated and highly concentrated aqueous solutions using DLS, turbidimetry, 1H- and 19F-NMR, rheology, determination of the CMC, foam height- and surface tension measurements and microscopy. Furthermore, their ability to stabilize emulsions and microemulsions and the wetting behaviour of their aqueous solutions on different substrates was investigated. The behaviour of the fluorine end-functionalized polymers to form micelles was studied applying DLS measurements in diluted organic solution. All investigated BAB-triblock copolymers were able to form micelles and show surface activity at room temperature in dilute aqueous solution. The aqueous solutions displayed moderate foam formation. With different types and concentrations of oils, the formation of emulsions could be detected using a light microscope. A boosting effect in microemulsions could not be found adding BAB-triblock copolymers. At elevated polymer concentrations, the formation of hydrogels was proved applying rheology measurements.
Im Rahmen dieser Arbeit wurden neue fluorierte und unfluorierte mono- und bifunktionelle Trithiocarbonate der Typen Z-C(=S)-S-R und Z-C(=S)-S-R-S-C(=S)-Z zur Anwendung als CTAs (chain- transfer agents) im RAFT-Polymerisationsverfahren hergestellt. Alle CTAs wurden erfolgreich auf ihre Effizienz zur Steuerung des radikalischen Polymerisationsverfahrens hin durch Polymerisation von Styrol (M3) getestet. Neben GPC-Messungen wurden Endgruppenanalysen der synthetisierten Blockcopolymere mittels 1H-, 19F-NMR und in manchen Fällen auch UV-Vis Spektroskopie durchgeführt. Dazu wurden die Z- und/oder R-Gruppen der CTAs mit geeigneten fluorierten Gruppen versehen. Durch Anwendung des RAFT Verfahrens konnten symmetrische Triblockcopolymere vom Typ BAB bzw. mit einer Fluoralkylgruppe endgecappte unsymmetrische Polymere in nur zwei bzw. einem Polymerisationsschritt hergestellt werden. Das RAFT- Polymerisationsverfahren ermöglicht sowohl die Polymerisation hydrophiler Monomere wie N-Isopropylacrylamid (NIPAM) (M1) oder N-Acryloylpyrrolidin (NAP) (M2) für die A-Blöcke als auch der hydropoben Monomere Styrol (M3), 2-Fluorostyrol (M4), 3-Fluorostyrol (M5), 4- Fluorostyrol (M6) und 2,3,4,5,6- Pentafluorostyrol (M7) für die B-Blöcke. Die Eigenschaften der Blockcopolymere in verdünnten, konzentrierten und hochkonzentrierten wässrigen Lösungen wurden mittels DLS, Trübungsphotometrie, 1H- und 19F-NMR, Rheologie, CMC- sowie Schaumhöhen- und Oberflächenspannungsmessungen und Lichtmikroskopie untersucht. Weiterhin wurden ihre Eigenschaften als Emulgatoren und in Mikroemulsion untersucht. Das Micellbildungsverhalten der hydrophob endfunktionalisierten Polymere wurde mittels DLS Messungen in verdünnter organischer Lösung untersucht. Alle untersuchten BAB-Triblöcke bildeten Micellen und zeigten Oberflächenaktivität bei Raumtemperatur in verdünnter, wässriger Lösung. Weiterhin zeigen die wässrigen Lösungen der Polymere mäßige Schaumbildung. Mit verschiedenen Öltypen und Ölkonzentrationen wurden Emulsionen bzw. Mikroemulsionen gebildet. In Mikroemulsion wurde durch Zugabe von BAB-Triblockopolymeren kein Boosting-Effekt erzielt werden. Bei Untersuchung höherer Polymerkonzentrationen wurde die Bildung von Hydrogelen mittels rheologischer Messungen nachgewiesen. Verschiedene Substrate konnten benetzt werden. Die hydrophob endgecappten Polymere bilden in verdünnter organischer Lösung Micellen, die mittels DLS untersucht wurden, und zeigen somit Tensidverhalten in nichtwässriger Lösung.

Più fonti

Libri sul tema "Systeme chemistry":

Merkel, Broder. Grundwasserchemie: Praxisorientierter Leitfaden zur numerischen Modellierung von Beschaffenheit, Kontamination und Sanierung aquatischer Systeme. Berlin: Springer, 2008.

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Germany), Bunsentagung (1997 Darmstadt. Bunsentagung, 1997, Darmstadt: 96. Hauptversammlung der Deutschen Bunsen-Gesellschaft für Physikalische Chemie, 8. bis 10. Mai : Hauptthema der Tagung, Physikalisch-chemisch Eigenschaften nanostrukturierter Systeme. [Frankfurt am Main]: Die Gesellschaft, 1997.

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1950-, Harvey Alan L., a cura di. Natural and synthetic neurotoxins. London: Academic Press, 1993.

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Risk Reduction Engineering Laboratory (U.S.), a cura di. CF Systems organics extraction system, New Bedford, Massachusetts. Cincinnati, Ohio: Risk Reduction Engineering Laboratory, Office of Research and Development, U.S. Environmental Protection Agency, 1990.

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Nakamura, Takayoshi, Takuya Matsumoto, Hirokazu Tada e Ken-ichi Sugiura, a cura di. Chemistry of Nanomolecular Systems. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05250-1.

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S, Alegret, a cura di. Integrated analytical systems. Amsterdam: Elsevier, 2003.

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Allcock, H. R. Contemporary polymer chemistry. 3^a ed. Upper Saddle River, N.J: Pearson/Prentice Hall, 2003.

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Allcock, H. R. Contemporary polymer chemistry. 2^a ed. Englewood Cliffs, N.J: Prentice Hall, 1990.

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Jaeschke, Wolfgang, a cura di. Chemistry of Multiphase Atmospheric Systems. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-70627-1.

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Li, Junbai, a cura di. Supramolecular Chemistry of Biomimetic Systems. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-6059-5.

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Capitoli di libri sul tema "Systeme chemistry":

Dittrich, Peter. "ArtificialArtificial chemistry (AC) ChemistryAC Artificial chemistry (AC)". In Encyclopedia of Complexity and Systems Science, 326–44. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-30440-3_23.

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Wigner, E. P. "The Statistics of Composite Systems According to the New Quantum Mechanics / Statistik zusammengesetzter Systeme nach der neueren Quanten-Mechanik". In Part I: Physical Chemistry. Part II: Solid State Physics, 63–68. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/978-3-642-59033-7_6.

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Sadownik, Jan W., e Sijbren Otto. "Systems Chemistry". In Encyclopedia of Astrobiology, 2460–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-662-44185-5_1095.

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Sadownik, Jan W., e Sijbren Otto. "Systems Chemistry". In Encyclopedia of Astrobiology, 1–3. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27833-4_1095-2.

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Kolb, Vera M., e Benton C. Clark. "Systems Chemistry". In Systems Approach to Astrobiology, 63–69. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003225874-5.

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Sadownik, Jan W., e Sijbren Otto. "Systems Chemistry". In Encyclopedia of Astrobiology, 2995–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-65093-6_1095.

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Kauffman, Stuart A. "Systems Chemistry Sketches". In ACS Symposium Series, 310–24. Washington, DC: American Chemical Society, 2008. http://dx.doi.org/10.1021/bk-2008-0981.ch017.

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Boeyens, Jan C. A. "Gauge Chemistry". In Large-Scale Molecular Systems, 363–70. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-5940-1_24.

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Kolb, Vera M., e Benton C. Clark. "Prebiotic Chemistry". In Systems Approach to Astrobiology, 71–82. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003225874-6.

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Salt, David J. "Bath Chemistry Control System". In Essential Readings in Light Metals, 798–803. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48156-2_118.

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Atti di convegni sul tema "Systeme chemistry":

NASIKHANOVA, A. Z. "ABOUT SOME PECULIARITIES OF PROFESSIONAL REQUIREMENTS TO THE LEVEL OF QUALIFICATION "CHEMISTRY" IN THE SYSTEM OF HIGHER EDUCATION". In The main issues of linguistics, lingvodidactics and intercultural communications. Astrakhan State University, 2020. http://dx.doi.org/10.21672/978-5-9926-1237-0-147-150.

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Abstract (sommario):

This article examines skill requirements to the profession of a chemist. Special attention is paid to numerous areas of application of knowledge of chemistry, risks in professional activities as well as occupational standards. The result of this research is the conclusion that thanks to the activities of chemists, humanity is not only based on the knowledge that was obtained earlier but also receives new ones.

Cerofolini, G. F., e P. Amato. "Fuzzy Chemistry ߞ An Axiomatic Theory for General Chemistry". In 2007 IEEE International Fuzzy Systems Conference. IEEE, 2007. http://dx.doi.org/10.1109/fuzzy.2007.4295523.

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Bräuchle, C. "Bacteriorhodopsin - Optical Processor Molecules from Nature". In Spectral Hole-Burning and Related Spectroscopies: Science and Applications. Washington, D.C.: Optica Publishing Group, 1994. http://dx.doi.org/10.1364/shbs.1994.fa3.

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The field of molecular electronics is characterized by an attempt to engineer and use devices on a molecular level. Supramolecular chemistry is one way to produce such molecular devices. However, long before supramolecular chemists tried to synthesize highly organized artificial systems often employing principles of living nature, nature itself has produced and optimized biological systems on a molecular device level during a long period of evolution.

Adamov, Dmitri P., Alexey Y. Akhlyostin, Alexandre Z. Fazliev, Eugeni P. Gordov, Alexey S. Karyakin, Sergey A. Mikhailov e Olga B. Rodimova. "Information-computational system: atmospheric chemistry". In Sixth International Symposium on Atmospheric and Ocean Optics, a cura di Gennadii G. Matvienko e Vladimir P. Lukin. SPIE, 1999. http://dx.doi.org/10.1117/12.370548.

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Chubb, Scott R., e Talbot A. Chubb. "Lattice induced nuclear chemistry". In Anomalous nuclear effects in deuterium/solid systems. AIP, 1991. http://dx.doi.org/10.1063/1.40728.

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Boughton, Bob. "California's Green Chemistry initiative". In 2009 IEEE International Symposium on Sustainable Systems and Technology (ISSST). IEEE, 2009. http://dx.doi.org/10.1109/issst.2009.5156787.

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"Degeneracy enriches artificial chemistry binding systems". In ECAL 2011: The 11th European Conference on Artificial Life. MIT Press, 2011. http://dx.doi.org/10.7551/978-0-262-29714-1-ch023.

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Onabe, Fumihiko, e Kunio Sakurai. "Applications of Flow Visualization Technique in Wet End Chemistry". In Fundamentals of Papermaking, a cura di C. F. Baker e V. Punton. Fundamental Research Committee (FRC), Manchester, 1989. http://dx.doi.org/10.15376/frc.1989.1.219.

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A microcomputer–aided flow visualization system consisting of Strobovision analyzer(SVA) and image processing apparatus was applied to the analysis of the effect of a variety of parameters in wet end chemistry on the flocculation behavior of model stock systems. These are (a)single polymer addition systems and dual component additive systems,(b)low and high filler content suspensions,and (c)colloidal force and hydrodynamic shear force. Analysis by digital geometry was carried out to represent features of projected images of flocs and fiber network supporting flocs. The flocculation states were represented numerically. It was attempted to test visually and numerically a flocculation hypothesis in a dual component additive system. Within the scope of the present investigation,there is some limitations in that this system can be applied only for dilute suspensions with concentrations far lower than those of conventional paper stock in a headbox.

Fakhruldeen, Hatem, Gabriella Pizzuto, Jakub Glowacki e Andrew Ian Cooper. "ARChemist: Autonomous Robotic Chemistry System Architecture*". In 2022 IEEE International Conference on Robotics and Automation (ICRA). IEEE, 2022. http://dx.doi.org/10.1109/icra46639.2022.9811996.

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Costa, David A. "Actinide chemistry in room temperature ionic liquids: actinide chemistry in RTIL systems (why?)". In Plutonium futures-The science (Topical conference on Plutonium and actinides). AIP, 2000. http://dx.doi.org/10.1063/1.1292268.

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Rapporti di organizzazioni sul tema "Systeme chemistry":

Нечипуренко, Павло Павлович, e Сергій Олексійович Семеріков. VlabEmbed – the New Plugin Moodle for the Chemistry Education. CEUR Workshop Proceedings, 2017. http://dx.doi.org/10.31812/0564/731.

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Research goals: The necessity of developing a plugin for Moodle, which is used to support the activities of experimental chemistry are substantiated. Description of created VlabEmbed plugin and the process of installing and configuring VlabEmbed plugin in system Moodle are reviewed. Object of research: Moodle plugins for chemistry education. Subject of research: VlabEmbed – the new plugin Moodle for the chemistry education. Research methods: review and analysis of scientific publications and Moodle plugins for the chemistry education. Results of the research: VlabEmbed plugin in system Moodle are created.

Terah, E. I. Video lectures on the discipline of «Chemistry» for students of specialty «Dentistry». SIB-Expertise, aprile 2022. http://dx.doi.org/10.12731/er0555.13042022.

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There are video lectures on chemistry for students of the specialty "Den-tistry": 6 lectures on general chemistry and 11 lectures on bioorganic chemistry. The total duration of the video lectures is 13 hours 17 minutes. In lectures on general chemistry, the basic provisions of chemical ther-modynamics and kinetics, chemical equilibrium, dispersed systems, solutions and their properties, ionic equilibria in solutions of elektrolites, buffer solutions, hydrolysis are considered. Lectures on bioorganic chemistry discuss the properties and importance of biologically important compounds, including proteins, carbohydrates, nucleic acids and fats, as well as issues of lipid peroxidation, antioxidant protection.

Nechypurenko, Pavlo P., e Vladimir N. Soloviev. Using ICT as the Tools of Forming the Senior Pupils’ Research Competencies in the Profile Chemistry Learning of Elective Course “Basics of Quantitative Chemical Analysis”. [б. в.], novembre 2018. http://dx.doi.org/10.31812/123456789/2659.

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Aims of the study: to substantiate possibilities of the research competencies formation among senior pupils in terms of profile Chemistry learning by means of practical using information and communication technology while accomplishing an elective course “Basics of quantitative chemical analysis”. This research considers the influence of various ICT tools on the formation of individual study and research competencies, in particular the system components of the research competencies among senior pupils in terms of profile Chemistry learning and the methods of their practical applying while accomplishing an elective course “Basics of quantitative chemical analysis”. Object of the study: ICT tools for Chemistry learning. Subject of the study: ICT tools of research competencies formation among senior pupils in terms of profile Chemistry learning. Methods of the study: reviewing and analyzing scientific publications, expert evaluation, summarizing pedagogical experience. Results of the study: the system of research competencies formation among senior pupils is effectively provided by the correct selection of ICT tools and conditions of their applying for the certain research competence formation, which embodies system components. Our research confirms the idea that the most ICT tools are to be leading in the development of research competencies among senior pupils in profile Chemistry learning. They are successfully tested by means of their applying in the process of studying the elective course “Basics of Quantitative Chemical Analysis”. They show the high effectiveness. Our study confirms that virtual chemical laboratories are the most universal and influential tools of forming the research competencies among senior pupils in profile Chemistry learning.

Neuman, R. D. Interfacial chemistry in solvent extraction systems. Office of Scientific and Technical Information (OSTI), gennaio 1992. http://dx.doi.org/10.2172/6951454.

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Neuman, R. D. Interfacial chemistry in solvent extraction systems. Office of Scientific and Technical Information (OSTI), gennaio 1993. http://dx.doi.org/10.2172/6568063.

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Neuman, R. Interfacial chemistry in solvent extraction systems. Office of Scientific and Technical Information (OSTI), gennaio 1990. http://dx.doi.org/10.2172/5039703.

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Belokonova, Nadezhda, Elena Ermishina, Natalya Kataeva, Natalia Naronova e Kristina Golitsyna. E-learning course "Chemistry". SIB-Expertise, gennaio 2024. http://dx.doi.org/10.12731/er0770.29012024.

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The electronic training course ""Chemistry"" was created as an auxiliary resource to accompany the chemistry curriculum for the specialties of General Medicine, Pediatrics, and Dentistry. The purpose of studying the course is to form ideas about the structure and transformations of organic and inorganic substances that underlie life processes and influence these processes, in direct connection with the biological functions of these compounds. Course objectives: - formation of knowledge and skills about the basic laws of thermodynamics and bioenergy; about the structure and chemical properties of bioorganic compounds and their derivatives; - formation of knowledge necessary when considering the physical and chemical essence of processes occurring in the human body at the molecular and cellular levels; - developing the ability to carry out, when necessary, calculations of the parameters of these processes, which will allow a deeper understanding of the functions of individual systems of the body and the body as a whole, as well as its interaction with the environment; - training of a specialist who has a sufficient level of knowledge, skills, abilities, and is able to think independently and be interested in research work. The labor intensity of the course is 108 hours. The course consists of 3 didactic units. Each course topic contains theoretical material, a practice test to test your understanding of the theory, and a final test. Each final test on a topic is equivalent to a control event according to a point-rating system. Laboratory work is presented in the form of a video file and a test for it. In this way, an electronic form of completing a report for laboratory work is carried out. The materials presented in the course can be used by teachers as basic when testing students or as additional to those methodological developments that are currently used at the department.

Shriver, D. F. Organometallic and surface chemistry of mixed-metal systems. Office of Scientific and Technical Information (OSTI), aprile 1993. http://dx.doi.org/10.2172/6623809.

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Magda, Karoly. SNS Resonance Control Cooling Systems and Quadrupole Magnet Cooling Systems DIW Chemistry. Office of Scientific and Technical Information (OSTI), gennaio 2018. http://dx.doi.org/10.2172/1427619.

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Henning, Robert. Zintl cluster chemistry in the alkali-metal-gallium systems. Office of Scientific and Technical Information (OSTI), marzo 1998. http://dx.doi.org/10.2172/350829.

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