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Опубліковано: 7 липня 2024

Оновлено: 7 липня 2024

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Статті в журналах з теми "13c rmn":

Torpoco Carmen, Virginia, and Juan Garbarino Bacigalupo. "ESTUDIOS DE HONGOS CHILENOS I: METABOLITOS EN RAMARIA FLACCIDA (FR.) RICKEN VAR. CHILENSIS LAZO." Revista Cientifica TECNIA 22, no. 1 (April 4, 2017): 65. http://dx.doi.org/10.21754/tecnia.v22i1.91.

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De los cuerpos fructíferos de Ramaria flaccida (Fr.) Ricken var. chilensis Lazo, se aislaron ergosterol y peroxiergosterol, además de los ácidos mirístico, palmítico, esteárico, oleico, linoleíco y linólenico. Las estructuras de estos metabolitos fueron determinadas mediante análisis espectroscópicos Masas, RMN 1H y RMN 13C. Palabras clave.- Metabolitos, Ergosterol, Acidos grasos. ABSTRACTFrom fruit bodies of Ramaria flaccida (Fr.) Ricken var. chilensis Lazo, were isolated ergosterol, peroxiergosterol, as well as myristic, palmitic, stearic, oleic, linoleic and linoleic acids. Structures of these metabolites were deduced by means of spectroscopic analysis mass, RMN 1H and RMN 13C. Keywords.- Metabolitos, Ergosterol, Fat acit..

Muñoz-Cendales, Diego Ricardo, Luis Enrique Cuca-Suárez, and Clara Inés Orozco P. "Aislamiento y estructura de algunos metabolitos secundarios de <i>Solanum validinervium (solanaceae)</i> sección geminata." Actualidades Biológicas 27, no. 1 (March 16, 2018): 49–52. http://dx.doi.org/10.17533/udea.acbi.331552.

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A partir de extracto etanólico de la parte aérea de Solanum validinervium y se aisló el compuesto 2-(4'-hidroxifenil)-etanol y las cumarinas esculetina e isoescopoletina. Sus estructuras fueron elucidadas por medio de técnicas espectroscópicas (IR y RMN-1 H, RMN-13C en una y dos dimensiones).

Gelboke, M., T. Blondiau, B. Kone, G. Lagrange, and R. Grimé. "Spectres RMN-1H Et -13C De Morpholines Et Thiomorpholines." Bulletin des Sociétés Chimiques Belges 93, no. 5 (September 1, 2010): 369–78. http://dx.doi.org/10.1002/bscb.19840930504.

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Coelho Guimarães, Camila, Vivianni Marques Leite dos Santos, and Juliana Angeiras Batista da Silva. "Estudo teórico de propriedades espectroscópicas de ressonância magnética nuclear 1H-RMN, 13C-RMN e 17O-RMN relativas à qualidade do biodiesel." Ciência & Engenharia 25, no. 1 (August 26, 2016): 43–48. http://dx.doi.org/10.14393/19834071.2016.22805.

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Canellas, L. P., G. A. Santos, A. A. Moraes, V. M. Rumjanek, and F. L. Olivares. "Avaliação de características de ácidos húmicos de resíduos de origem urbana: I. métodos espectroscópicos (UV-Vis, IV, RMN 13C-CP/MAS) e microscopia eletrônica de varredura." Revista Brasileira de Ciência do Solo 24, no. 4 (December 2000): 741–50. http://dx.doi.org/10.1590/s0100-06832000000400006.

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Foram caracterizados fisico-quimicamente ácidos húmicos, obtidos de composto de resíduos sólidos urbanos (AH-CRSU) e de lodo de estação de tratamento de esgoto (AH-LETE), ambos produzidos na cidade do Rio de Janeiro, por meio da análise da composição elementar, acidez total, de dados espectroscópicos (UV-Vis; IV, RMN de 13C-CP/MAS) e microscopia eletrônica de varredura (MEV). A análise das características estruturais revelou diferenças entre os AHs estudados. A presença de sistemas aromáticos foi observada por meio da espectroscopia de UV-Vis, indicando sistemas mais substituídos nos AH-LETE. A espectroscopia na região do infravermelho (IV) mostrou a presença de estruturas alifáticas nos AHs e maior complexidade nos sinais de absorção devida a polissacarídeos nos AH-CRSU. Além disso, foram observados grupos OH, COOH, COO-, CO2NH2, e confirmada a presença de sistemas aromáticos. Com a análise de RMN de 13C-CP/MAS, foi possível verificar as diferenças quantitativas nos diferentes tipos de carbono. Os AH-LETE apresentaram maior quantidade de grupos aromáticos e de COOH. A análise de RMN de 13C-CP/MAS também mostrou presença de polissacarídeos, N em aminoácidos e grupamentos OCH3. O conjunto de propriedades avaliadas permitiu indicar que a fração ácidos húmicos dos resíduos é "do tipo" ou "análoga" aos ácidos húmicos de origem pedogênica.

Vélez-Guzmán, Daniel F., Paula A. Charry-Sánchez, Jhon F. Castañeda-Gómez, and Eunice Ríos-Vásquez. "Fitoesteroles de las partes aéreas de Ipomoea trifida (convolvulaceae)." Boletín Científico Centro de Museos Museo de Historia Natural 27, no. 2 (July 1, 2023): 31–47. http://dx.doi.org/10.17151/bccm.2023.27.2.2.

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Objetivo: Aislar e identificar los fitoesteroles mayoritarios presentes en la especie vegetal Ipomoea trífida a través de diversas técnicas cromatográficas, técnicas espectroscópicas de resonancia magnética nuclear (RMN) y espectrometría de masas (EM). Metodología: Las partes aéreas de Ipomoea trifida fueron colectadas en la vereda La Concha, municipio de Circasia, Colombia. Luego, se secaron, pulverizaron y maceraron con hexano para el fraccionamiento y purificación de dos esteroles mayoritarios por cromatografía de columna. Las estructuras se elucidaron por técnicas de RMN y espectrometría de masas. Resultados: Los espectros de RMN-1 H, RMN-13C y DEPT 135, COSY, HSQC y espectrometría de masas mostraron señales características de los fitoesteroles, acetato de β-sitosterilo y el dihidrolanosterol, siendo el primer reporte para esta especie vegetal. Conclusión: Se aislaron e identificaron por primera vez dos fitoesteroles mayoritarios, el acetato de β-sitosterilo y el dihidrolanosterol en el extracto hexánico de la especie vegetal Ipomoea trifida colectada en el departamento del Quindío, como sólidos amorfos, mediante técnicas espectroscópicas que permitieron determinar la presencia del núcleo pentanoperhidrofenantreno, los grupos acetato e hidroxilo en la posición 3 para cada uno de ellos y la cadena lateral en la posición 17.

Trilleras, Jorge, Karen Feria, Daniel Alcazar, Jairo Quiroga, Manuel Nogueras, and Justo Cobo. "Síntesis multicomponente y caracterización de derivados pirimido [4,5-b] quinolínicos con evaluación de la actividad antileishmania." Revista Colombiana de Ciencias Químico-Farmacéuticas 46, no. 1 (January 1, 2017): 5–17. http://dx.doi.org/10.15446/rcciquifa.v46n1.67286.

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A partir de 6-amino-3-metil-2-(metiltio)pirimidin-4(3H)-ona, aldehídos aromáticos y benzoquinona, por medio de una reacción de ciclodeshidratación de Michael asistida por radiación de microondas, se realizó la síntesis y caracterización de la serie de derivados tricomponentes pirimido[4,5-b]quinolínicos, y se evaluó la posible actividad antileishmania. Los nuevos compuestos se caracterizaron por análisis espectroscópico de IR, RMN 1H, RMN 13C y MS.

Bonnet, A., G. Barre, and P. Gilard. "« Trinoyaux ». Détermination des structures par RMN 1H, 13C et 15N." Journal de Chimie Physique 92 (1995): 1823–28. http://dx.doi.org/10.1051/jcp/1995921823.

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Ceroni Galloso, Mario, Jorge Reynaldo Angulo-Cornejo, Maria Nieves Lino-Pacaheco, Claudia Cecilia Villanueva Huerta, and Enzo Martín Casimiro Soriano. "Synthesis and characterization of mixed-ligand silver(I) saccharinate complex containing (2-(2-pyridyl)benzimidazole." Revista Colombiana de Química 47, no. 2 (May 1, 2018): 73–78. http://dx.doi.org/10.15446/rev.colomb.quim.v47n2.68225.

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Se sintetizó un nuevo compuesto de coordinación de plata, [Ag(sac)(pbi)], por reacción de sacarinato de plata(I) con 2-(2-piridil)bencimidazol (pbi) con un rendimiento de 64%. La caracterización se realizó por análisis elemental, espectroscopia IR, UV-Visible, XPS, 1H-RMN y 13C-RMN. De acuerdo con los resultados obtenidos la plata está coordinada a través de tres átomos de nitrógeno, uno del sacarinato y los dos restantes del 2-(2-piridil)-bencimidazol formando con este ligando un anillo quelato de cinco miembros.

Le Botlan, D. J. "Etude par spectroscopie rmn 13C de la solution aqueuse formaldehyde-methanol." Journal de Chimie Physique 84 (1987): 115–23. http://dx.doi.org/10.1051/jcp/1987840115.

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Дисертації з теми "13c rmn":

Faccione, Milton. "Sintese e RMN-13C de lactonas arildiidronaftalenicas e ariltetraidronaftalenicas." [s.n.], 1986. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249826.

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Orientador :Sebastião Ferreira Fonseca
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica
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Schahl, Adrien. "Interactions polysaccharides-lipides : étude théorique et expérimentale combinant calculs de dynamique moléculaire, calculs quantiques de spectres RMN 13C et RMN 13C à l'état solide." Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30178.

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Les interactions entre polysaccharides et lipides forment aujourd'hui un vaste domaine d'étude, présentant notamment un intérêt particulier pour les industries alimentaires et pharmaceutiques. Nous savons que l'amylose, un polysaccharide composé de résidus glucose branchés en [apha 1→4] essentiellement linéaire, peut encapsuler de petites molécules hydrophobes formant ce qu'on appelle un polymorphe V. L'étude de ce type de complexes pourrait permettre de développer de nouvelles voies de formulations de substances bioactives ou de nouveaux adjuvants de vaccins. Ce type d'interactions pourraient aussi être présentes dans d'autres systèmes biologiques, tels que dans la capsule de Mycobacterium tuberculosis. En effet, cette couche externe enveloppant le bacille contient majoritairement un polysaccharide ramifié analogue à l'amylose appelé alpha-glucane mais aussi de multiples lipides connus comme étant des facteurs de virulence de cette mycobactérie, tels que les dimycocérosates de phthiocérol ou les dimycolates de tréhalose. La mise en évidence et l'analyse de ce type d'interaction pourrait permettre de comprendre l'organisation de cette capsule et d'en savoir plus sur ses fonctions biologiques. Ce manuscrit présente une étude mêlant méthodes théoriques et expérimentales de caractérisation des interactions au sein de complexes d'amylose en présence de lipides "classiques" ou mycobactériens ainsi que de systèmes comprenant des polysaccharides ramifiés. La première partie de ce manuscrit présente deux études purement théoriques portant sur des complexes d'amylose en présence d'acide palmitique et de doubles hélices d'amylose appelées polymorphe B. En utilisant une méthodologie couplant dynamique moléculaire (MD) et calculs de paramètres RMN par DFT, nous avons pu caractériser le nombre minimum de résidus glucose nécessaires pour former de manière stable le polymorphe V autour de l'acide palmitique. Nous avons pu aussi démontrer l'impact de la longueur du polymère sur le calcul de paramètre RMN et qu'il était crucial d'introduire le caractère dynamique de ces polymorphes afin d'obtenir des résultats en accord avec l'expérience. Concernant le polymorphe B, nous avons pu montrer qu'il était nécessaire de prendre en compte les conditions périodiques du système afin de pouvoir différencier deux types de résidu au sein de la double hélice, comme cela est observé expérimentalement sur des échantillons cristallins.[...]
Polysaccharide-lipid interactions now form a vast domain of study, of particular interest to the pharmaceutical and food industries. We already know that amylose, an essentially linear polysaccharide composed of [alpha 1→4]-linked glucose moieties, can form helices around small hydrophobic molecules and lipidic chains. These helical structures are called V polymorphs and their study may allow the development of new ways to deliver bioactive compounds, or of new vaccine adjuvants. This type of interaction might also be found in other biological systems, such as in the capsule of Mycobacterium tuberculosis. Indeed, this external layer covering the bacillus is composed mostly of a large branched polysaccharide analogous to amylose, called alpha-glucan, but it also contains numerous lipids, such as phtiocerol dimycocerosates or trehalose dimycolates, known to be virulence factors of the mycobacterium. Demonstration of the existence of such interactions and their study may lead to a better understanding of the capsule and its biological functions. This manuscript describes a study combining theoretical and experimental methods to characterize the interactions amongst amylose complexes formed in the presence of classical and mycobacterial lipids and in systems composed of branched polysaccharides. The first part of this work describes two purely theoretical studies on amylose complexed with palmitic acid and on amylose double helices called B polymorphs. Using molecular dynamics (MD) simulations and calculations of Nuclear Magnetic Resonance (NMR) parameters at the Density Functional Theory (DFT) level, we were able to define the minimum number of glucose residues needed to former a stable V polymorph around a palmitic acid molecule. We could also show that the number of residues has a direct impact on the calculation of NMR parameters and that it is crucial to consider the dynamic behavior of these polymers to obtain results that fit well to experimental data. Regarding the B polymorph, we showed that it is essential/necessary to consider the periodic conditions of the system to be able to characterize two different residue positions, as has been observed experimentally. To the best of our knowledge, no V polymorph has been characterized in the presence of lipids composed of several lipidic chains. The second part of this manuscript describes several such complexes, formed in the presence of classical and mycobacterial lipids composed of 1, 2 or 4 lipidic chains, and their analysis by solid-state NMR. We elaborated a model describing the different equilibria implicated in the complexation process and could demonstrate that the primary structure of the lipids was one of the key factors. [...]

Carneiro, Paulo Irajara Borba. "Sobre a natureza do efeito alfa em RMN de 13C." [s.n.], 1988. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249187.

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Orientador : Roberto Rittner Neto
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica
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Mestrado

Bayle, Kevin. "Développements méthodologiques RMN 13C isotopique pour l'étude de voies métaboliques." Nantes, 2014. https://archive.bu.univ-nantes.fr/pollux/show/show?id=30bc90dd-d09e-4983-ac96-8f8ae6202686.

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Le but de l’étude menée au cours du travail de thèse a été la détermination d’effets isotopiques associés à trois voies métaboliques (Embden-Meyerhof-Parnas, Entner-Doudoroff et phosphocétolase) par le biais de fermentations de micro-organismes et levures effectuant la biotransformation du glucose en éthanol et acide lactique. Dans un premier temps, une réflexion a été menée sur les paramètres analytiques nécessaires à l’analyse d’acides carboxyliques par RMN 13C isotopique. Les questionnements soulevés par l’analyse de l’acide acétique ont amené à élargir l’étude et prendre en compte une gamme plus large de molécules. L’ensemble de ces travaux constitue de ce fait une évaluation des conditions nécessaires à l’obtention de mesures exactes en RMN 13C isotopique indépendamment du spectromètre utilisé. De plus, la mesure par RMN-13C isotopique, utilise jusqu’à présent la teneur globale 13C, mesurée par SMRI. La détermination des fractions molaires mesurées en RMN permet l’obtention des teneurs intramoléculaires 13C. L’implémentation d’une méthode de référencement interne pour le carbone a nécessité la prise en compte de nombreux paramètres et a donc requis un développement conséquent dont la validation quantitative d’une nouvelle séquence RMN 1H visant à éliminer le « radiation damping ». Grâce à une méthodologie juste et précise, nous avons mis en évidence la présence d’effets isotopiques intramoléculaires supposés, apparents, associés aux voies métaboliques, malgré qu’ils soient relativement faibles. Ceux-ci diffèrent d’une voie à l’autre, en accord avec la formation de métabolites différents au cours de réactions enzymatiques caractéristiques à chaque voie
The aim of the study has been the determination of isotope effects associated with three metabolic pathways (Embden-Meyerhof-Parnas, Entner-Doudoroff and phosphoketolase) using fermentation by yeasts and microorganisms bio-transforming glucose into ethanol and lactic acid. Initially, a study was conducted on the analytical parameters required for the analysis of carboxylic acids by 13C iq-NMR. Doubts raised in relation to the analysis of acetic led to the study being expanded to include a wider range of molecules. This section of the work is therefore composed of an assessment of the conditions for obtaining accurate measurements of 13C iq-NMR regardless of the spectrometer used. The current strategy to access the site-specific 13C measurements (δ13Ci) is dependent on the δ13Cg, obtained by IRMS, coupled with the determination by 13C iq-NMR of the molar fraction for each carbon measured. The implementation of the same methodology for 13C iq-NMR has required many factors to be taken into consideration. Establishing an analytical protocol for the implementation of an internal standard for 13C iq-NMR has required significant development, with the quantitative validation of a new 1H NMR sequence aiming to eliminate radiation damping. Thanks to the accurate methodology established, we have been able to detect the presence of relatively small intramolecular kinetic isotope effects associated with the metabolic pathways studied. Each pathway gives a characteristic isotopic signature, consistent with the formation of metabolites produced by the specific enzymatic reactions. The 13C isotope effects obtained are in agreement with the reactions that characterise each pathway

Schneider, Michel. "Informatisation des techniques de calcul des déplacements chimiques en RMN 13C." Metz : Université Metz, 2008. ftp://ftp.scd.univ-metz.fr/pub/Theses/1984/Schneider.Michel.SMZ8407.pdf.

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Gasmi, Geneviève. "Developpement de nouvelles sequences d'impulsions en rmn : etude du nosiheptide (antibiotique cyclopeptidique) par rmn 1h, 13c, 15n." Reims, 1993. http://www.theses.fr/1993REIMP204.

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Ferreira, Marcelo José Pena. "Análise espectral, geração de estrutura e simulação de dados de RMN 13C." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/46/46135/tde-20032018-142649/.

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O sistema especialista SISTEMAT tem por objetivo auxiliar pesquisadores da área de produtos naturais no processo de determinação estrutural de substâncias. Para tanto, utilizando dados provenientes de várias técnicas espectrométricas e espectroscópicas, principalmente RMN 13C, inúmeros programas foram desenvolvidos com a finalidade de propor o provável esqueleto de uma substância. Essa informação, juntamente com as substruturas apresentadas a partir de um conjunto de dados, é utilizada por geradores estruturais como grandes restrições, a fim de impedir a explosão combinatória e a geração de propostas estruturais incompatíveis com produtos naturais, além de reduzir o elevado tempo computacional gasto durante uma análise. Esse trabalho descreve o desenvolvimento e utilização dos módulos de reconhecimento de esqueletos, determinação e geração estrutural e simulação de dados de RMN 13C de esteróides. Assim, foi elaborada uma base de dados com 1436 substâncias distribuídas entre 119 tipos de esqueletos provenientes das mais diversas fontes naturais. Vários testes foram realizados e bons percentuais de acerto foram obtidos para o reconhecimento de esqueletos e geração de propostas estruturais através da sobreposição dos tipos de anéis encontrados em esqueletos de esteróides. Para validar as propostas estruturais apresentadas pelo gerador, bem como para prever os dados de deslocamentos químicos de novos esteróides, o simulador de dados de RMN 13C foi usado e, quando comparado a um programa comercial de mesma finalidade, apresentou maior exatidão na previsão dos dados.
The aim of the expert system SISTEMAT is to aid natural product researchers in the process of structural determination of organic substances. For that, using data from various spectrometric and spectroscopic techniques, mainly 13C NMR, countless programs were developed to propose the most probable skeleton of a substance. This information together with the substructures shown from the data set are utilized by structural generators as important constraints in order to avoid the combinatorial explosion problem and the generation of incompatible structural proposals for natural products, besides reducing the computational time spent during the analysis. This work describes the development and use of the modules of skeleton identification, structural determination and generation, and the 13C NMR data prediction of steroids. Thus, was built a database containing 1436 steroids distributed in 119 different skeletons originated from the most varied natural sources. Several tests were performed, wherein good hit percentuals were obtained for the skeleton identification and structural generation through the overlapping of the types of rings found in the steroid skeletons. For validation of the structural proposals shown by the generator as well as for prediction of the chemical shift data of new substances, the simulator of 13C NMR data was used and next compared with a commercial program of the same purpose, and exhibited higher accuracy in the data prediction.

Silva, Junior Milton Marques da. "Estudo do efeito ALFA de grupos fenila p-substituidos em RMN de 13C." [s.n.], 1992. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249184.

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Orientador : Roberto Rittner Neto
Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica
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Mestrado

Caytan, Elsa. "Détermination de la distribution intramoléculaire du 13C en abondance naturelle par RMN quantitative." Nantes, 2006. http://www.theses.fr/2006NANT2034.

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Les conditions expérimentales pour la détermination de la distribution intramoléculaire du 13C par RMN quantitative ont été étudiées. Dans un premier temps, des molécules doublement marquées 13C sont utilisées comme outil pour évaluer les performances des méthodes d'analyse (justesse, précision). Deux stratégies sont ensuite proposées pour la réduction de la durée de l'analyse : L'emploi d'un agent relaxant permet de diminuer le temps de répétition, et l'utilisation de la séquence à transfert de polarisation INEPT permet une meilleure sensibilité. L'effet des imperfections des impulsions RF sur la séquence INEPT a été modélisé, et la séquence a été optimisée grâce à l'utilisation d'impulsions adiabatiques et à la modification du cycle de phase. Les méthodes développées permettent de réaliser des analyses quantitatives précises par RMN 13C, pour l'étude de phénomènes physiques entraînant un fractionnement isotopique ainsi que pour l'authentification de produits naturels
Experimental conditions for the determination of the intramolecular distribution of 13C by NMR have been studied. In the first instance, 13C bi-labelled molecules were used to evaluate the performance of analytical methods (accuracy, precision). Two strategies were then set up for reducing the duration of the analysis. The use of relaxation agents enables a reduction of the repetition delay, and polarisation transfer sequences, such as INEPT, enhance sensibility. The effects of RF pulses imperfections on the INEPT sequence have been modelled, and the INEPT sequence optimised by use of adiabatic pulses and modifications to phase cycling. The methods developed make possible the precise quantitative analysis by 13C NMR of 13C/12C isotopic ratios, which can be applied in studies of isotopic fractionation and in the authentication of natural products

Bailac, Laura. "Composés organiques fluorés : Étude par RMN multinoyaux {1H, 13C, 19F} et calculs DFT." Rouen, 2016. http://www.theses.fr/2016ROUES008.

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Depuis plus de 40 ans, les composés fluorés sont en plein essor dans le milieu pharmaceutique, le diagnostic, la chimie agro-alimentaire et les matériaux polymères. La connaissance de la structure 3D de ces composés peut s'avérer importante notamment dans le cas d'étude d'interactions entre molécules. La RMN est un outil de choix pour la caractérisation structurale de produits de synthèse et de composés naturels. De plus, le fluor 19 possède des propriétés magnétiques remarquables qui en font une sonde intéressante pour la caractérisation structurale par RMN de composés organiques fluorés. Au cours de ce travail, une étude structurale approfondie de composés organiques fluorés par RMN et DFT a été réalisée. Des expériences RMN récentes, utilisant des impulsions sélectives et des gradients d'encodage telles que les expériences 1D Pure Shift et 2D G-SERF, ont permis d'extraire des données spectroscopiques précises telles que des déplacements chimiques et des constantes de couplage scalaire homo- et hétéro-nucléaire. Ces données spectroscopiques ont été complétées par des données structurales (distances interatomiques, angles dièdres) obtenues par optimisation de la géométrie des composés par DFT. Dans la seconde partie de ce travail, les données obtenues par RMN ont servi de point d'étalonnage pour développer un modèle de calcul DFT à l'aide d'un "benchmark" permettant de prédire, à partir de la structure 3D, les couplages scalaires hétéro-nucléaires nJHF pour les familles de composés étudiés. Cette méthode permet également de déterminer les différentes contributions qui composent le couplage scalaire. L'accès au poids de chacune de ces contributions pour un couplage donné permet une meilleure compréhension du mécanisme de transmission de ce couplage, en particulier dans le cas de couplages scalaires à longue distance
For more than 40 years, fluorinated compounds have become increasingly important in the field of pharmaceutical, food chemistry and polymers. The knowledge of the 3D structure of those compounds can be of great importance especially in the case of molecule interaction studies. NMR is the most powerful method for the structural characterization of synthetic and natural compounds. Moreover, fluorine 19 owns remarkable magnetic properties which make it an interesting probe for the structural characterization of fluorinated organic compounds by NMR. During this project, a thorough structural study of fluorinated compounds by NMR and DFT has been realized. Recent NMR experiments, using selective pulses and encoding gradient such as the 1D Pure Shift and 2D G-SERF experiments, helped extract very accurate spectroscopic data such as chemical shifts and homo- and heteronuclear scalar coupling constants. Those spectroscopic data have been then completed by structural data such as internuclear distances and dihedral angles obtained by DFT geometry optimization of those compounds. In the second part of this work, the data obtained by NMR were used to develop a DFT computational model using a benchmark to predict, from the 3D structure, the heteronuclear coupling constants nJHF. This model also allows to determine the different contributions composing the scalar coupling. The access to each contribution's weight for a given coupling allows a better understanding of the mechanism of coupling's transmission, in particular in the case of long distance scalar couplings

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Kuhn, Darl, Sam Alapati, and Arup Nanda. RMAN Recipes for Oracle Database 12c. Berkeley, CA: Apress, 2013. http://dx.doi.org/10.1007/978-1-4302-4837-8.

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Wu, Meihua, and Jiayao Teng. Ren jian ren ai! mei nü hua ti fa xing 136 kuan. 8th ed. Xinbei Shi Xindian Qu: Ba fang chu ban gu fen you xian gong si, 2011.

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Cheng, Xiaodong, Zixiong Li, and Zhaoming Liu. Qian nü you hun II: Ren jian dao : A Chinese ghost story II, the story continues. Hong Kong: Media Asia, 1993.

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Yang, Wang, ed. Zhuan dong ren sheng xi wang de 136 ge bei tai. 8th ed. Taibei Xian Zhonghe Shi: Zhong jing she, 2003.

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zhi, Shan. Jing ming ren ban shi de 135 ge xiao ji qiao. Bei jing: Zhong guo hua qiao chu ban she, 2007.

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Xie, Zhiqiang, and Caixin Zhang. Ren wei shen me huo zhe: Quan qiu 139 wei da shi de da an. 8th ed. Beijing Shi: Jiu zhou chu ban she, 2007.

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Földváry, Miklós. Ordinarius Strigoniensis: Impressum pluries Nurenbergae, Venetiis et Lugduni, annis Domini 1493-1520 (RMK III Suppl. I 5031, RMK III 35, 134, 165, 166, 238). Budapest: Argumentum, 2009.

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"Nong shi san shi Hong xing si chang jian shi" bian zuan wei yuan hui. Nong shi san shi Hong xing si chang jian shi. 8th ed. Xinjiang Wujiaqu Shi: Xinjiang sheng chan jian she bing tuan chu ban she, 2012.

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Grisham, John. Wu gu zhi ren: Xiao zhen yuan an ji shi. 8th ed. Taibei Shi: Yuan liu chu ban shi ye gu fen you xian gong si, 2007.

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Shui bo lu tong le hui. Shen qi! shui bo lu liao li quan shu: Hai xuan 135 dao da ren shi pu, zheng, kao, chao, zha, dun yi lu duo cai chu yi da sheng ji. 8th ed. Taibei Shi: Xie le wen hua you xian gong si, 2015.

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Kuhn, Darl. "Configuring RMAN." In Pro Oracle Database 12c Administration, 483–510. Berkeley, CA: Apress, 2013. http://dx.doi.org/10.1007/978-1-4302-5729-5_17.

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Malcher, Michelle, and Darl Kuhn. "Configuring RMAN." In Pro Oracle Database 18c Administration, 693–732. Berkeley, CA: Apress, 2019. http://dx.doi.org/10.1007/978-1-4842-4424-1_17.

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Kuhn, Darl, Sam Alapati, and Arup Nanda. "Tuning RMAN." In RMAN Recipes for Oracle Database 12c, 503–32. Berkeley, CA: Apress, 2013. http://dx.doi.org/10.1007/978-1-4302-4837-8_16.

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Kuhn, Darl, Sam Alapati, and Arup Nanda. "Troubleshooting RMAN." In RMAN Recipes for Oracle Database 12c, 533–65. Berkeley, CA: Apress, 2013. http://dx.doi.org/10.1007/978-1-4302-4837-8_17.

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Kuhn, Darl, Sam Alapati, and Arup Nanda. "Using RMAN." In RMAN Recipes for Oracle Database 12c, 85–110. Berkeley, CA: Apress, 2013. http://dx.doi.org/10.1007/978-1-4302-4837-8_4.

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Kuhn, Darl, Sam Alapati, and Arup Nanda. "Scripting RMAN." In RMAN Recipes for Oracle Database 12c, 255–90. Berkeley, CA: Apress, 2013. http://dx.doi.org/10.1007/978-1-4302-4837-8_9.

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Kuhn, Darl, Sam Alapati, and Arup Nanda. "Jump-Starting RMAN." In RMAN Recipes for Oracle Database 12c, 21–37. Berkeley, CA: Apress, 2013. http://dx.doi.org/10.1007/978-1-4302-4837-8_2.

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Kuhn, Darl, Sam Alapati, and Arup Nanda. "RMAN and RAC." In RMAN Recipes for Oracle Database 12c, 671–81. Berkeley, CA: Apress, 2013. http://dx.doi.org/10.1007/978-1-4302-4837-8_23.

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Kuhn, Darl, Sam Alapati, and Arup Nanda. "RMAN and ASM." In RMAN Recipes for Oracle Database 12c, 683–94. Berkeley, CA: Apress, 2013. http://dx.doi.org/10.1007/978-1-4302-4837-8_24.

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Kuhn, Darl, Sam Alapati, and Arup Nanda. "RMAN in Exadata." In RMAN Recipes for Oracle Database 12c, 695–717. Berkeley, CA: Apress, 2013. http://dx.doi.org/10.1007/978-1-4302-4837-8_25.

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Тези доповідей конференцій з теми "13c rmn":

Cardoso, Evani Ferreira, Rodrigo de Souza Miranda, Roberto Carlos Campos Martins, Gunar Vingre da Silva Mota, Antônio Maia de Jesus Chaves Neto, and Fábio Luiz Paranhos Costa. "Uso de Cálculos de RMN de 13C e 1H e Redes Neurais no Auxilio da Determinação Estrutural da Savinina." In VIII Simpósio de Estrutura Eletrônica e Dinâmica Molecular. Universidade de Brasília, 2020. http://dx.doi.org/10.21826/viiiseedmol2020178.

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This is a theoretical-experimental work, where the focus molecule of the study is savinine, a lignan of the dibenzylbutyrolactonic type, substances that can be found in several genera, one of which has a greater occurrence is the genus Acanthopanax (Araliaceae) which is traditionally used as an analgesic and immune system stimulant, in addition to exhibiting a potent insecticidal and cytotoxic activity for human colon carcinoma HCT116 cells. It was isolated and here we present its experimental and theoretical characterization by means of 13C and 1H NMR data and the possible confirmation of the structure using the neural network tool (ANN-PRA). The objective of this work is to use theoretical calculations of 13C and 1H NMR and experimental data for the resolution of the savinine structure, and the use of the neural network tool (ANN-PRA) to confirm the structure of the molecule.

Braga, Bárbara Luiza Duarte, Felipe De Castro Santana, Glaucia Souza Barbosa, Ludmyla Marques Ferreira, and Hugo De Farias Ramalho. "ESTUDO PRELIMINAR DA MODIFICAÇÃO QUÍMICA DO EUGENOL PARA POTENCIALIZAÇÃO DE ATIVIDADE ANTIMICROBIANA." In III Congresso Brasileiro de Ciências Farmacêuticas On-line. Revista Multidisciplinar em Saúde, 2022. http://dx.doi.org/10.51161/conbracif/30.

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Introdução: As importações de fármacos e insumos farmacêuticos, criam um cenário de dependência nacional da indústria farmacêutica estrangeira. Diante disto, torna-se necessária a produção de novos compostos em laboratório. Uma possível solução pode estar no desenvolvimento de novos materiais de origem renovável, oriundos da biomassa, como por exemplo o Eugenol (molécula mais abundante e reativa do óleo essencial de cravo da índia - Syzygium aromaticum). Tendo em vista a atividade antimicrobiana preexistente da molécula do Eugenol. Objetivo: Este trabalho teve como objetivo potencializar essa atividade através da modificação química pela reação de epoxidação/abertura com amina, da molécula extraída do óleo essencial do cravo da índia (Syzygium aromaticum) por hidrodestilação. Material e métodos: Após as etapas de modificação química, e caracterização do óleo por ressonância magnética nuclear de hidrogênio e carbono (1H RMN e 13C RMN, Varian modelo Mercury 300), testes de atividade antimicrobiana foram realizados em triplicata com cepas de Pseudomonas aeruginosa, Escherichia coli e Staphyloccocus aureus. Nas semeaduras foram empregados um disco com o óleo essencial de Eugenol (o produto inicial não modificado), um disco com o composto modificado, e um disco de cada um dos antibióticos a seguir: Amoxicilina com clavulonato, Cloranfenicol, Gentamicina, Imipenem e Vancomicina, mantidos em estufa a 36ºC durante 72h. Resultados: Ao final do período de incubação foi analisado que a cultura de Staphyloccous aureus não demonstrou crescimento microbiano, e que a média do halo de inibição do composto modificado foi de 0,6mm contra as cepas de Pseudomonas aeruginosa e de 1cm contra as cepas de E. coli. Média semelhante aos antibióticos convencionais como a Gentamicina e o Cloranfenicol. Conclusão: Os resultados obtidos inferem que o produto modificado potencializou a atividade antimicrobiana da molécula eugenol.

Wernehag, Johan, and Henrik Sjoland. "Second harmonic 60-GHz power amplifiers in 130-nm CMOS." In 2007 Ph.D Research in Microelectronics and Electronics Conference. IEEE, 2007. http://dx.doi.org/10.1109/rme.2007.4401833.

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Wen-Chieh Wang and Chung-Yu Wu. "The 1-V 24-GHz low-voltage low-power current- mode transmitter in 130-nm CMOS technology." In 2007 Ph.D Research in Microelectronics and Electronics Conference. IEEE, 2007. http://dx.doi.org/10.1109/rme.2007.4401808.

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Alves, Geomar Souza, Fábio Luiz Paranhos Costa, Antônio Maia de Jesus Chaves Neto, and Gunar Vingre da Silva Mota. "Análise de RMS de 13C usando GIAO, CSGT e IGAIM: Fatores de escalonamentos de Terpenos." In VIII Simpósio de Estrutura Eletrônica e Dinâmica Molecular. Universidade de Brasília, 2020. http://dx.doi.org/10.21826/viiiseedmol2020153.

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Terpenes are natural products that have several biological and pharmacological properties that are directly related to their chemical structures. In the structural determination of organic molecules, Nuclear Magnetic Resonance (NMR) is used on a large scale. The chemical shift (δ) being the most important parameter. The present study aims to develop and test (the elemol molecule will be used for this purpose) δ scaling factors from 13C to terpenes, based on linear regressions. 10 complex sesquiterpene molecules were selected with the unmistakably determined structures (confirmed with X-ray crystallography). The geometries were optimized at the B3LYP / 6-311 + G (d, p) level, in the gaseous phase, and the δ will be obtained at the PBE0 / aug-cc-pvdz level with three different approaches GIAO, CSGT and IGAIM, in phase gaseous and liquid, where the PCM model (polarized continum model) was used. The TMS (tetramethylsilane) was used as a reference and the experimental data of 13C were obtained in chloroform. The results of scaled RMS for the terpenes used to generate the scaling factors show that when the effects of the solvent are taken into account, even implicitly, there is an improvement in the reproduction of experimental data. However, the difference in scaled RMS values is not large enough to justify taking into account interactions with the solvent, at least with the PCM model. It is interesting to note that with the level of theory PBE0 / aug-cc-pvdz, the GIAO method presented a lower performance than the other 2 used. Another interesting point is that its calculation time, according to the simulations generated in this work, was, on average, 30% greater than the CSGT and IGAIM. Thus, for studies with terpenes, with this level of theory, the use of the GIAO method is not indicated.

Huang, Huan, Jie Peng, Xiaowen Wang, Chongfu Zhang, and Kun Qiu. "Optically Centralized Beamforming for MmWave Cloud RAN Systems: Impact of Beam Alignment." In Asia Communications and Photonics Conference. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/acpc.2021.t4a.133.

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Harris, C. "Efficient Depth Migration for Complex Overburdens by Global Inversion of RMO." In 59th EAGE Conference & Exhibition. European Association of Geoscientists & Engineers, 1997. http://dx.doi.org/10.3997/2214-4609-pdb.131.gen1997_a019.

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van Essen, Sanne, Henry Bandringa, Joop Helder, and Bas Buchner. "Non-Linear Wave Run-Up Along the Side of Sailing Ships Causing Green Water on Deck: Experiments and Deterministic Calculations." In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18130.

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Abstract Experiments with a flat plate in oblique waves at different speeds, wave conditions, headings and drift speed were done to evaluate non-linear wave run-up along a sailing ship. Both the incoming and diffracted part of the run-up were highly nonlinear in all test conditions. The run-up was larger at 135 than at 150 deg heading, the influence of speed was small, wave steepness increased run-up up to the point of breaking and a drift speed decreased the run-up. Most of the observed differences were larger than the seed and basin variability. (Semi-) linear diffraction methods are not sufficient to predict the highest runup crests, but applying them to screen for critical events could be further studied. CFD is able to accurately predict the nonlinear run-up in such selected events. Combining different levels of tools seems the most efficient way to predict extreme wave events such as green water due to run-up.

Mckenna, S. G. "SP0172 What effect does exercise have on sleep in rmd?" In Annual European Congress of Rheumatology, EULAR 2018, Amsterdam, 13–16 June 2018. BMJ Publishing Group Ltd and European League Against Rheumatism, 2018. http://dx.doi.org/10.1136/annrheumdis-2018-eular.7716.

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Haddar, Gamar, Desi Safitri, and Arbain Arbain. "Realistic Mathematic Education (RME) Model in Primary School." In Proceedings of the 1st International Conference on Business, Law And Pedagogy, ICBLP 2019, 13-15 February 2019, Sidoarjo, Indonesia. EAI, 2019. http://dx.doi.org/10.4108/eai.16-10-2019.163219.

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Звіти організацій з теми "13c rmn":

Drees A. Analysis of Vernier Scans during RHIC Run-13. Office of Scientific and Technical Information (OSTI), October 2013. http://dx.doi.org/10.2172/1104828.

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Jelen, Deborah, and Jean-Francois Gravel. DTPH56-13-T-000003 INO Technologies Assessment of Leak Detection. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), August 2015. http://dx.doi.org/10.55274/r0012054.

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Current leak detection systems for pipelines are not only unreliable in the detection of minute leaks but often expensive and/or dangerous to run. This is an unacceptable standard for pipeline operators and leak detection service providers. Electricore, Inc., and INO with support from TransCanada and National Scientific Research Institute (INRS/RDDC) conducted a new research effort consisting of the development of a transportable leak detection system (LDS) demonstrating the ability to externally locate, identify, and assess small liquid and gaseous leaks (weeper/seepers) from a safe standoff distance.

Alansari, Mohamed, Cathy Wylie, Rose Hipkins, Sinead Overbye, Renee Tuifagalele, and Sophie Watson. Secondary teachers' Perspectives from NZCER's 2021 National Survey of Secondary Schools. NZCER, June 2022. http://dx.doi.org/10.18296/rep.0022.

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The long-running National Survey of Schools project is part of the New Zealand Council for Educational Research’s (NZCER’s) Te Pae Tawhiti programme of research. NZCER has run a national survey of secondary schools every 3 years since 2003. For the 2021 National Survey of Secondary Schools, we surveyed a sample of 5,376 teachers, randomly chosen from a stratified sample of Years 9–13 and Years 7–13 secondary schools to ensure national representation of schools across all deciles. A total of 1,093 teachers responded to the survey over two data collection waves, giving a nationally representative picture in terms of school decile.

Fischl-Lanzoni, Natalia, Martin Hiti, Nathan Kaplan, and Asani Sarkar. Investor Attention to Bank Risk During the Spring 2023 Bank Run. Federal Reserve Bank of New York, April 2024. http://dx.doi.org/10.59576/sr.1095.

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We examine how investors’ perception of bank balance sheet risk evolved before and during the March-April 2023 bank run. To do so, we estimate the covariance (“beta”) of bank excess stock returns with returns on factors constructed from long-short portfolios sorted on shares of uninsured deposits and unrealized losses on securities. We find that the market’s perception of bank risk shifted in both the time series and the cross-section. From January 2022 to February 2023, both factor betas were mostly insignificant, but after the bank run started, they became positive and significant for all banks on average. However, in the cross-section, only the factor betas of banks put on downgrade watch on March 13 were significant, consistent with our finding that this announcement was informative. When additional banks were downgraded in April, their factor betas also became significant, even though we find the April announcements to be noninformative for these banks. We suggest that investors with limited attention focused on the banks included in the April announcements to update their priors on balance sheet risk.

Gall, Graham A. E., Gideon Hulata, Eric M. Hallerman, Bernard May, and Umiel Nakdimon. Creating and Characterizing Genetic Variation in Tilapia through the Creation of an Artificial Center of Origin. United States Department of Agriculture, February 2000. http://dx.doi.org/10.32747/2000.7574344.bard.

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Five stocks of tilapia [oreochromis niloticus (on), red O. niloticus (ROn), O. aureus (Oa), O. mossambicus (Om), and Sarotherodon galilaeus (Sg)] were used to produce two-way (F1), three-way (3WC) and four-way crosses (4WC). Three 4WC groups, containing equal representation of all four species, formed the base population for a new synthetic stock, called an "artificial center of origin" (ACO). Four genomic maps were created using microsatellite and AFLP markers, two from a 3WC family [Om female and (Oa x ROn) male] and two from a 4WC family [(Om x Oas) females and (Sg x On) male]. Sixty-two loci segregating from the female parent of the 3WC mapped to 14 linkage groups while 214 loci from the male parent mapped to 24 linkage groups. Similarly, 131 loci segregating from the female parent of the 4WC mapped to 26 linkage groups and 118 loci from the male parent mapped to 25 linkage groups. Preliminary screening of an F2 and a 4WC family identified a number of loci associated with cold tolerance and body weight. These loci were clustered in a few linkage groups, suggesting they may be indicative of quantitative trait loci.

Turnquist, Michael. PR460-223602-R01 Response to Corrosion Intersecting the Longitudinal Seam in Liquid Pipelines. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), June 2024. http://dx.doi.org/10.55274/r0000069.

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The primary objectives of project EC-02-13 "Response to Corrosion Interacting with the Longitudinal Seam in Liquid Pipelines" are to clarify what analysis methodologies are appropriate to assess corrosion intersecting a pipeline longitudinal seam weld (LSW) and to develop recommended guidelines to effectively manage these types of features. The overall project scope included execution of destructive testing of corrosion features intersecting an LSW, material property testing of LSWs produced by multiple manufacturing methods, detailed engineering analysis, and a literature review of all past relevant research. This project is funded by the Crack Management Strategic Research Priority (SRP) and is being executed in parallel with sibling projects EC-02-12 "Evaluation of Selective Seam Weld Corrosion Susceptibility," NDE-4-13 "Selective Seam Weld Corrosion Detection with In-line Inspection Technologies," IM-3-03 "Comprehensive Review and Assessment Guidelines for SSWC," IM-1-08 "Pragmatic Application of MegaRule RIN 1 - 192.712 Toughness Values," and NDE-2-15 "SSWC Identification, Sizing, and Measuring Grooving Ratio In the Ditch."

Balza, Lenin, Laura Heras-Recuero, David Matías, and Ariel Yépez-García. Green or Growth? Understanding the Relationship between Economic Growth and CO2 Emissions. Inter American Development Bank, May 2024. http://dx.doi.org/10.18235/0012943.

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The relationship between economic growth and environmental impact is a topic that has largely been studied through the framework of the Environmental Kuznets Curve (EKC), which posits an inverted U-shape relationship between the two. We examine this link by analyzing GDP and CO2 emissions per capita from 1970 to 2020 using a panel of 136 countries. We estimate both the short- and long-run income elasticities of CO2 emissions across various regions and for rolling time periods. The analysis focuses on Latin America and the Caribbean, aggregating and disaggregating data by region and introducing alternative measures of CO2 emissions. Though our findings confirm the existence of the EKC at the global level, we do not find evidence of it for all regions. A monotonic positive relationship between income and emissions is observed for Latin America and the Caribbean. We also find that, in most cases, the income elasticity of production-based emissions is lower than that of consumption-based emissions. This distinction is particularly pronounced in the Latin American and Caribbean region, where the income elasticity of consumption-based emissions is estimated at 0.95, as opposed to 0.56 when using a production-based measure.

Malcolm, Gerard. Modeling Country Risk and Capital Flows in GTAP. GTAP Technical Paper, September 2000. http://dx.doi.org/10.21642/gtap.tp13.

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This paper describes how the standard GTAP framework may be used to assess the short-run impacts of changes in international capital market conditions. It describes a technique that can be used to examine the short-run effects of changes in country risk. In the standard GTAP model investment demand is spread across regions according to a simple rate-of-return-equalizing rule. By making the risk premium in this rule explicit, we are able to examine the effects of changes in these risk premium. This work was originally developed as part of the course material for the South African GTAP short course in January 1998. South Africa has experienced a series of dramatic changes during the last decade, and these have had very significant effects on the capital account. Thus, this paper also contains an application of the technique developed to the recent South African experience, and an assessment of how well the simulated changes in this application match actual outcomes. Technical Paper Number 13 can be downloaded in PDF format. To print this you will need the Adobe Acrobat Reader. Replication of the results in this technical paper may be readily accomplished using the latest version of the RunGTAP software. For those interested in further analysis of the implications of the capital inflow for the South African economy, as well as for the rest of Southern Africa, please download this file in MS Word format.

Brown Horowitz, Sigal, Eric L. Davis, and Axel Elling. Dissecting interactions between root-knot nematode effectors and lipid signaling involved in plant defense. United States Department of Agriculture, January 2014. http://dx.doi.org/10.32747/2014.7598167.bard.

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Root-knot nematodes, Meloidogynespp., are extremely destructive pathogens with a cosmopolitan distribution and a host range that affects most crops. Safety and environmental concerns related to the toxicity of nematicides along with a lack of natural resistance sources threaten most crops in Israel and the U.S. This emphasizes the need to identify genes and signal mechanisms that could provide novel nematode control tactics and resistance breeding targets. The sedentary root-knot nematode (RKN) Meloidogynespp. secrete effectors in a spatial and temporal manner to interfere with and mimic multiple physiological and morphological mechanisms, leading to modifications and reprogramming of the host cells' functions, resulted in construction and maintenance of nematodes' feeding sites. For successful parasitism, many effectors act as immunomodulators, aimed to manipulate and suppress immune defense signaling triggered upon nematode invasion. Plant development and defense rely mainly on hormone regulation. Herein, a metabolomic profiling of oxylipins and hormones composition of tomato roots were performed using LC-MS/MS, indicating a fluctuation in oxylipins profile in a compatible interaction. Moreover, further attention was given to uncover the implication of WRKYs transcription factors in regulating nematode development. In addition, in order to identify genes that might interact with the lipidomic defense pathway induced by oxylipins, a RNAseq was performed by exposing M. javanicasecond-stage juveniles to tomato protoplast, 9-HOT and 13-KOD oxylipins. This transcriptome generated a total of 4682 differentially expressed genes (DEGs). Being interested in effectors, we seek for DEGs carrying a predicted secretion signal peptide. Among the DEGs including signal peptide, several had homology with known effectors in other nematode species, other unknown potentially secreted proteins may have a role as root-knot nematodes' effectors which might interact with lipid signaling. The molecular interaction of LOX proteins with the Cyst nematode effectors illustrate the nematode strategy in manipulating plant lipid signals. The function of several other effectors in manipulating plant defense signals, as well as lipids signals, weakening cell walls, attenuating feeding site function and development are still being studied in depth for several novel effectors. As direct outcome of this project, the accumulating findings will be utilized to improve our understanding of the mechanisms governing critical life-cycle phases of the parasitic M. incognita RKN, thereby facilitating design of effective controls based on perturbation of nematode behavior—without producing harmful side effects. The knowledge from this study will promote genome editing strategies aimed at developing nematode resistance in tomato and other nematode-susceptible crop species in Israel and the United States.

Neumann, Wiebke, Fredrik Stenbacka, Jonas Malmsten, Joris Cromsigt, Fredrik Widemo, Navinder Singh, and Göran Ericsson. GPS-märkt klövvilt i Nordmalings studieområde 2017-2021 – Fördelning, rörelse, livsmiljö och överlevnad. Sveriges lantbruksuniversitet, Institutionen för vilt, fisk och miljö, 2022. http://dx.doi.org/10.54612/a.67tect4oie.

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I Sverige är Nordmaling ett av få områden på så nordlig breddgrad där flera olika klövviltarter (d v s älg, rådjur, kronhjort och dovhjort, såväl som ren och mufflon) förekommer i större omfattning. Därmed utgör Nordmaling ett utmärkt referensområde att studera hur olika klövviltarter påverkar varandra och den omgivande miljön (studier om ekosystempåverkan) under nordiska förhållanden. Under perioden mars 2017 till mars 2021 märktes 27 vuxna älgkor, 23 rådjur (13 getter, 10 bockar) och 8 kronhindar med GPS-halsband. Totalt föddes 113 kalvar av 27 kor under studieperioden. Sommaröverlevnad av GPS-kornas årskalvar låg i genomsnitt på 88 % och efter jakten var 45% av de födda kalvarna vid liv. Antal kalvar som sköts under jakten skiftade mycket mellan åren och överlevnad under jakten låg i medel på 52%. Alla arter visade en dygnsrytm i sitt aktivitetsmönster med två aktivitetstoppar – en under tidig morgon och en senare på eftermiddag/kvälle. För älgkorna kunde vi se både vandringsälgar och stationära älgar. Rådjuren och kronhindarna visade inget tydligt vandringsbeteende som älgkorna – förutom ett rådjur. Livsmiljöanvändning under vinter varierade något mellan arterna där älgarna visade minst variation för olika livsmiljöer jämfört med tallskog och i relation till rådjur och kronhindar. Likaså under sommaren använde älgkorna ingen livsmiljö mer eller mindre än tallskog, medan rådjuren och kronhindarna visade en tydlig selektion för andra livsmiljöer än tallskog under vår/sommarperioden. Studier i Nordmalings området har ökat vår förståelse om hur älg, rådjur och kronhindar nyttjar ett borealt landskap på nordliga breddgrader. En viktig orsak till att försökspopulationen i Nordmaling fungerar så bra är det nära samarbetet med alla intresserade. Intresset är mycket stort, många olika användare är inne på hemsidan www.slu.se/alg-forskning.