Bibliografie tematiche / Methiin

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Letteratura scientifica selezionata sul tema "Methiin"

Autore: Grafiati
Pubblicato: 31 ottobre 2024

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Articoli di riviste sul tema "Methiin"

1

Takada, Noboru, Sayaka Sutoh, Masuru Toyota, Yoshihisa Yamazaki, Nozomi Kitano-Yamashita, Chisato Ushida e Kazuo Yamashita. "Methiin as a nematode attractant in Allium sativum". Canadian Journal of Chemistry 98, n. 3 (marzo 2020): 164–68. http://dx.doi.org/10.1139/cjc-2019-0338.

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Abstract (sommario):
Damage to garlic (Allium sativum L.) caused by nematodes (Ditylenchus destructor Thorne) is becoming a serious agricultural hazard, leading to a great loss in garlic production. Once the garlic bulbs are invaded, the pathogenic nematode drastically increases in number along with the rotting of bulbs. It was therefore conceived that nematode attractants are present in the bulbs. Based on this hypothesis, chemical investigations were performed to explore a nematode attractant in A. sativum bulbs, which resulted in the identification of methiin (S-methyl-l-cysteine S-oxide) as an attractant. Bioassay and quantification experiments of methiin in extracts of A. sativum bulb led to the conclusion that methiin possesses sufficient potential to attract D. destructor into A. sativum bulbs. Moreover, an activity comparing study of methiin with its analogs showed that the sulfoxide functionality is essential for attractant activity. Moreover, methiin was revealed to attract Caenorhabditis elegans. Further investigation of methiin will help to elucidate the neuronal system of D. destructor.
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2

Ovesná, Jaroslava, Ladislav Kučera, Jana Králová, Leona Leišová, Helena Stavělíková e Jan Velíšek. "Genetic Diversity Among Garlic Clones as Revealed by Aflp, Phenotypic Descriptors and S-Amino Acids Level". Vegetable Crops Research Bulletin 66, n. 1 (1 gennaio 2007): 105–16. http://dx.doi.org/10.2478/v10032-007-0013-9.

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Genetic Diversity Among Garlic Clones as Revealed by Aflp, Phenotypic Descriptors andS-Amino Acids LevelGarlic (Allium sativumL.) belongs to well known vegetables. Garlic is considered a valuable source of health benefit compounds.S-amino acids, namelyS-alk(en)yl-L-cysteine sulfoxides, are one of the major garlic constituents. We evaluated a set of garlic genetics resources representing namely valuable germplasm from Czech Republic, Slovakia, Poland and former Soviet Union. We showed that differences exist among analysed genotypes inS-amino acids (alliin/methiin) level and donors of high level of alliin/methiin can be identified. High alliin/methiin level was found within genetic resources and registered cultivars under the use. Level of alliin and isoalliin did not correlate with measured level of methiin. Donors of high methiin level were found within accessions marked as being "wild" in EVIGEZ database. Sufficient variability was found by AFLP analysis as well. Accessions were divided by PCA basically into two categories: hardnecks (Ophioscorodongroup,Longicuspisgroup) and softneck (sativum group). Presented work showes possibility to find suitable donors of biologically active compounds in garlic.
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3

Horníčková, J., R. Kubec, J. Velíšek, CejpekK, J. Ovesná e H. Stavělíková. "Changes of S-alk(en)ylcysteine sulfoxide levels during the growth of different garlic morphotypes". Czech Journal of Food Sciences 29, No. 4 (10 agosto 2011): 373–81. http://dx.doi.org/10.17221/3/2011-cjfs.

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Abstract (sommario):
The contents of three S-alk(en)ylcysteine sulfoxides (alliin, methiin, and isoalliin) were determined in the leaves, pseudostems, and bulbs of six garlic genotypes (two flowering plant morphotypes, two semi bolters, and two scape absent morphotypes) cultivated for five consecutive years at the same location. The average levels of alliin, methiin, and isoalliin were found to be as follows: 1.92, 0.44, and 0.07 mg/g fw in the leaves, 1.57, 0.27, and 0.08 mg/g fw in the pseudostems, and 1.71, 0.20 and 0.13 mg/g fw in the bulbs, respectively. No statistically significant year-to-year differences were observed between the samples. Furthermore, the total contents and relative proportions of S-alk(en)ylcysteine sulfoxides in various parts of the plants (leaves, pseudostems, bulbs and roots) were evaluated in detail during the whole vegetation period. It was observed that the total content of these amino acids gradually decreased in all parts except for the bulbs. In the bulbs, the total content initially decreased after planting but significantly increased in June and culminated before harvest. Analogous trends were also observed for alliin and methiin concentrations. On the other hand, isoalliin levels steadily decreased during the whole vegetation period in all parts of the plants.
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4

Horníčková, J., R. Kubec, K. Cejpek, J. Velíšek, J. Ovesná e H. Stavělíková. "Profiles of S-alk(en)ylcysteine sulfoxides in various garlic genotypes". Czech Journal of Food Sciences 28, No. 4 (6 settembre 2010): 298–308. http://dx.doi.org/10.17221/135/2010-cjfs.

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Abstract (sommario):
The contents of major S-alk(en)ylcysteine sulfoxides (namely alliin, methiin and isoalliin) were determined in a set of 58 various garlic genotypes (22 flowering plant morphotypes, 14 semi bolting plants and 22 scape absent morphotype plants), representing the garlic collection of the Allium gene bank in the Czech Republic. The plants were cultivated in four successive years (2005–2008) and analysed immediately after harvest and subsequently after eight weeks of storage at 5°C. The total content of the three cysteine derivatives in fresh samples varied considerably between 3.35 mg/g fresh weigh and 12.77 mg/g fresh weight, with the mean of 7.50 mg/g fresh weight and the average relative proportions of alliin/methiin/isoalliin of 83/16/1. Upon 8-week storage at 5°C, the average total amount of S-alk(en)ylcysteine sulfoxides increased by 30% to 9.75 mg/g fresh weight, with the alliin/methiin/isoalliin ratio changing to 82/14/4. The data obtained were statistically evaluated using linear discrimination analysis to distinguish the differences between the years of harvest, between freshly harvested and stored samples, and between the individual morphotypes. While the year-to-year differences between the samples were statistically not very significant, the fresh and stored samples as well as the individual garlic morphotypes differed considerably in S-alk(en)ylcysteine sulfoxide content. Our results indicate that the content of S-alk(en)ylcysteine sulfoxides primarily depends on various genetic factors and post-harvest storage conditions, whereas the climatic conditions during the growth (e.g. temperature, irrigation) influence their level to a lesser extent. Various implications for the food and pharmaceutical industries are discussed.  
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5

Velíšek, J., e R. Kubec. "S-Substituted cysteine derivatives in production of flavour and colour". Czech Journal of Food Sciences 22, SI - Chem. Reactions in Foods V (1 gennaio 2004): S54—S59. http://dx.doi.org/10.17221/10611-cjfs.

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Abstract (sommario):
A brief review of our continuous investigations on S-substituted cysteine derivatives is presented herein. It comprises a summary on nonenzymatic (thermal) decomposition of these amino acids as well as on their role in the formation of blue and pink pigments during processing of garlic and onion, respectively. The emphasis is put on four most common derivatives, namely S-methyl-, S-allyl-, S-1-propenyl- and S-propylcysteine sulfoxides (methiin, alliin, isoalliin and propiin, respectively). Our results demonstrate that these sulfur-containing amino acids are the key primary precursors in the formation of both flavour and colour of alliaceous plants.
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6

Kolodiazhna, Anastasy О., Аleksei I. Skliarov, Alena A. Slastennikova e Oleg I. Kolodiazhnyi. "Asymmetric synthesis of (S,R)- and (R,R)-methiin stereoisomers". Phosphorus, Sulfur, and Silicon and the Related Elements 195, n. 9 (29 aprile 2020): 713–17. http://dx.doi.org/10.1080/10426507.2020.1755972.

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7

Horie, Hideki, e Ken-ichiro Yamashita. "Non-derivatized analysis of methiin and alliin in vegetables by capillary electrophoresis". Journal of Chromatography A 1132, n. 1-2 (novembre 2006): 337–39. http://dx.doi.org/10.1016/j.chroma.2006.09.018.

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8

Horníčková, J., J. Velíšek, J. Ovesná e H. Stavělíková. "Distribution of S-alk(en)yl-l-cysteine Sulfoxides in Garlic (Allium sativum L.)". Czech Journal of Food Sciences 27, Special Issue 1 (24 giugno 2009): S232—S235. http://dx.doi.org/10.17221/610-cjfs.

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Abstract (sommario):
This study was devoted to distribution of <I>S</I>-alk(en)yl-L-cysteine sulfoxides (particularly alliin, methiin, and isoalliin) in plants of <I>Allium sativum</I> L. and to diversity of selected groups of garlic clones representing the three basic garlic morfotypes (i.e. flowering plants, scape absent and semi-bolters – this classification is based on IPGRI descriptors). The content of <I>S</I>-alk(en)yl-L-cysteine sulfoxides, important non-volatile precursors flavour-active compounds, was determined in four parts (roots, bulbs, false stems, and leaves) of six different clones of garlic (<I>Allium sativum</I> L.) plants collected during the whole of vegetation – in March, April, May, June, and July. The contents of target <I>S</I>-alk(en)yl-L-cysteine sulfoxides were dependent not only on part of garlic plants but also on morfotype of garlic plants and vegetation period.
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9

Jang, Gwang-Ju, Mi Jeong Sung, Haeng Jeon Hur, Miyoung Yoo, Jung Hoon Choi, In Koo Hwang e Sanghee Lee. "Metabolomics Analysis of the Lipid-Regulating Effect of Allium hookeri in a Hamster Model of High-Fat Diet-Induced Hyperlipidemia by UPLC/ESI-Q-TOF Mass Spectrometry". Evidence-Based Complementary and Alternative Medicine 2018 (27 settembre 2018): 1–8. http://dx.doi.org/10.1155/2018/5659174.

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Abstract (sommario):
Hyperlipidemia is a risk factor for atherosclerotic cardiovascular disease and is a major public health concern. Allium hookeri (AH) is an Allium species containing high levels of bioactive organosulfur compounds such as methiin and cycloalliin. AH exerts hypolipidemic effects in animals fed a high-fat diet. However, there exists little information on the mechanisms underlying these effects. To address this issue, we used a metabolomic approach based on ultra-performance liquid chromatography quadrupole time-of-flight mass spectrometry to identify factors mediating the lipid-lowering effects of AH. Principal component and partial least-squares discriminant analyses of serum metabolome profiles revealed 25 metabolites as potential biomarkers for the effects of AH on lipid levels. These compounds were predominantly phospholipids, including phosphatidylcholines (PCs), lysoPCs, and lysophosphatidylethanolamines. Glycerophospholipid metabolism was identified as a significantly enriched pathway. These results provide mechanistic insight into the antihyperlipidemic effects of AH and evidence for its efficacy as a therapeutic agent.
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10

Seino, Teruyuki. "Effects of Processing and Preservation Conditions on Methiin and Alliin Contents of Chinese Chive Stems". Nippon Shokuhin Kagaku Kogaku Kaishi 69, n. 7 (15 luglio 2022): 343–52. http://dx.doi.org/10.3136/nskkk.69.352.

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Tesi sul tema "Methiin"

1

Meden, Peter. "Kinetik inelastischer Stösse von CH(A2D, v=)- [CH(A 2 Delta, v o)] und CH(B2S-, v=0)-Radikalen [CH(B 2 Sigma, v 0)-Radikalen] mit CO-Molekülen". [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964724936.

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2

Reck, Andreas Michael. "Homocysteinstoffwechsel und Atherosklerose Methionin-Belastungstests und langfristige Methionin-Applikation im Kaninchenmodell /". [S.l. : s.n.], 2006.

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3

Pexa, Annette. "Alimentäres Methionin und Hyperhomocysteinämie". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2007. http://nbn-resolving.de/urn:nbn:de:swb:14-1168459718761-52550.

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Abstract (sommario):
Eine erhöhte Konzentration von Homocystein im Plasma (Hyperhomocysteinämie) gilt als unabhängiger Risikoindikator für neuronale und kardiovaskuläre Erkrankungen. Der Präcursor des Homocysteins, Methionin, ist eine essentielle Aminosäure, die bei Fehlernährung übermäßig verzehrt werden kann. Es wurde untersucht, ob tatsächlich durch langfristigen erhöhten Methioninverzehr via Erhöhung des Homocysteinspiegels im Plasma ein reales Gesundheitsrisiko besteht. Als Modell wurde eine Füttterungsstudie an Ratten gewählt, deren Bedingungen bezüglich Fütterungsdauer und Methioningehalt der Diät (0,4 % Methionin für 4 Wochen) an eine mögliche Fehlernährung des Menschen angepasst waren. Bei diesen Ratten war die Plasmahomocystein-Konzentration ca. 2-fach höher, als bei Ratten, die im gleichen Zeitraum eine &quot;normale&quot; Diät mit einem 3-4 fach niedrigeren Methioningehalt bekamen. Neben der Auswirkung der Diät auf den Homocystein-Stoffwechsel wurde geprüft, welche der in der Literatur dargestellten potentiellen Pathomechanismen für Hyperhomocysteinämie-induzierte Schäden Anwendung in diesem Modell finden. Obwohl die Konzentration von Homocystein im Plasma verändert war, wurde keine Beeinträchtigung der Gefäßfunktion gefunden. Auch die Plasmakonzentration von asymmetrischem Dimethylarginin, einem weiteren Risikoindikator für Herz-Kreislauf-Erkrankungen blieb unverändert, obwohl dieser Parameter bei Hyperhomocysteinämie oftmals erhöht ist. Eine Konzentrationsverdoppelung von Homocystein durch erhöhte alimentäre Methioninzufuhr ohne gleichzeitige Erhöhung von ADMA scheint also keine Verschlechterung der Gefäßfunktion bei Ratten zu bewirken. In diesem Punkt kann man von in anderen Modellen der Hyperhomocysteinämie gefundenen Resultaten keine Rückschlüsse auf die durch alimentäres Methionin verursachte Hyperhomocysteinämie ziehen. Andere Modelle zur Induktion einer Hyperhomocysteinämie ist Homocyst(e)in-Fütterung. In weiteren Rattenstudien wurden Effekte homocystin- und methioninreiche Diät verglichen. In diesen Studien zeigte sich, dass bei ähnlichen applizierten Dosen (tägliche Aufnahme ca. 1,0 bzw. 1,4 g/kg Körpergewicht) methionin- und homocystinreiche Diät bei Ratten zu vergleichbaren Plasma-Homocysteinspiegeln führen (methioninreich: 27,32 ± 2,80 µmol/l; homocystinreich: 40,61 ± 2,22 µmol/l). Als Vergleichsparameter zur Beurteilung pathophysiologischer Veränderungen diente zum einen der Gewebsgehalt an Homocystein, zum anderen wurden die intrazellulären Konzentrationen von S-Adenosyl-Methionin (SAM) und S-Adenosyl-Homocystein (SAH) betrachtet. Es zeigten sich besonders in Leber und Niere signifikante Unterschiede zwischen einer methioninreichen und einer homocystinreichen Diät bei Ratten. Dies ist eine mögliche Erklärung dafür, dass die bei vierwöchiger methioninreicher Diät gefundenen Ergebnisse nicht mit Literaturdaten übereinstimmen. Abschließend wurde der Frage nachgegangen, ob eine homocytinreiche Ernährung, wie in der vorherigen Studie angewandt, überhaupt möglich ist. Da zwar die Gehalte von Methionin in fast allen Lebensmitteln bekannt sind, nicht aber die von Homocystein, wurde untersucht, in welchen Konzentrationen Homocystein in Lebensmitteln enthalten ist. In Schwarzbier (0,03 mg/l), Weißbrot (0,95 mg/kg), Roquefort-Käse (0,50 mg/kg), Thunfisch (0,25 mg/kg) und Schweineleber (0,31 mg/kg) konnte Homocystein bestimmt werden. Da die Homocysteinkonzentrationen in diesen Beispiellebensmitteln mindestens um den Faktor 105 geringer waren als die Methioninkonzentrationen ist ein Einfluss von alimentärem Homocystein auf den Plasmaspiegel sehr unwahrscheinlich. Es wurde weiterhin geprüft, ob durch Darmbakterien ein Teil des alimentär aufgenommenen Methionins bereits im Dünndarm in Homocyt(e)in umgewandelt werden könnte. Dabei wurde eine vermehrte Homocysteinproduktion nach Methionin-Zugabe zu Dünndarmisolaten gefunden. Quantitativ kommt dieser Homocysteinquelle eine untergeordnete Bedeutung zu.
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4

Pexa, Annette. "Alimentäres Methionin und Hyperhomocysteinämie". Doctoral thesis, Technische Universität Dresden, 2006. https://tud.qucosa.de/id/qucosa%3A24971.

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Abstract (sommario):
Eine erhöhte Konzentration von Homocystein im Plasma (Hyperhomocysteinämie) gilt als unabhängiger Risikoindikator für neuronale und kardiovaskuläre Erkrankungen. Der Präcursor des Homocysteins, Methionin, ist eine essentielle Aminosäure, die bei Fehlernährung übermäßig verzehrt werden kann. Es wurde untersucht, ob tatsächlich durch langfristigen erhöhten Methioninverzehr via Erhöhung des Homocysteinspiegels im Plasma ein reales Gesundheitsrisiko besteht. Als Modell wurde eine Füttterungsstudie an Ratten gewählt, deren Bedingungen bezüglich Fütterungsdauer und Methioningehalt der Diät (0,4 % Methionin für 4 Wochen) an eine mögliche Fehlernährung des Menschen angepasst waren. Bei diesen Ratten war die Plasmahomocystein-Konzentration ca. 2-fach höher, als bei Ratten, die im gleichen Zeitraum eine &quot;normale&quot; Diät mit einem 3-4 fach niedrigeren Methioningehalt bekamen. Neben der Auswirkung der Diät auf den Homocystein-Stoffwechsel wurde geprüft, welche der in der Literatur dargestellten potentiellen Pathomechanismen für Hyperhomocysteinämie-induzierte Schäden Anwendung in diesem Modell finden. Obwohl die Konzentration von Homocystein im Plasma verändert war, wurde keine Beeinträchtigung der Gefäßfunktion gefunden. Auch die Plasmakonzentration von asymmetrischem Dimethylarginin, einem weiteren Risikoindikator für Herz-Kreislauf-Erkrankungen blieb unverändert, obwohl dieser Parameter bei Hyperhomocysteinämie oftmals erhöht ist. Eine Konzentrationsverdoppelung von Homocystein durch erhöhte alimentäre Methioninzufuhr ohne gleichzeitige Erhöhung von ADMA scheint also keine Verschlechterung der Gefäßfunktion bei Ratten zu bewirken. In diesem Punkt kann man von in anderen Modellen der Hyperhomocysteinämie gefundenen Resultaten keine Rückschlüsse auf die durch alimentäres Methionin verursachte Hyperhomocysteinämie ziehen. Andere Modelle zur Induktion einer Hyperhomocysteinämie ist Homocyst(e)in-Fütterung. In weiteren Rattenstudien wurden Effekte homocystin- und methioninreiche Diät verglichen. In diesen Studien zeigte sich, dass bei ähnlichen applizierten Dosen (tägliche Aufnahme ca. 1,0 bzw. 1,4 g/kg Körpergewicht) methionin- und homocystinreiche Diät bei Ratten zu vergleichbaren Plasma-Homocysteinspiegeln führen (methioninreich: 27,32 ± 2,80 µmol/l; homocystinreich: 40,61 ± 2,22 µmol/l). Als Vergleichsparameter zur Beurteilung pathophysiologischer Veränderungen diente zum einen der Gewebsgehalt an Homocystein, zum anderen wurden die intrazellulären Konzentrationen von S-Adenosyl-Methionin (SAM) und S-Adenosyl-Homocystein (SAH) betrachtet. Es zeigten sich besonders in Leber und Niere signifikante Unterschiede zwischen einer methioninreichen und einer homocystinreichen Diät bei Ratten. Dies ist eine mögliche Erklärung dafür, dass die bei vierwöchiger methioninreicher Diät gefundenen Ergebnisse nicht mit Literaturdaten übereinstimmen. Abschließend wurde der Frage nachgegangen, ob eine homocytinreiche Ernährung, wie in der vorherigen Studie angewandt, überhaupt möglich ist. Da zwar die Gehalte von Methionin in fast allen Lebensmitteln bekannt sind, nicht aber die von Homocystein, wurde untersucht, in welchen Konzentrationen Homocystein in Lebensmitteln enthalten ist. In Schwarzbier (0,03 mg/l), Weißbrot (0,95 mg/kg), Roquefort-Käse (0,50 mg/kg), Thunfisch (0,25 mg/kg) und Schweineleber (0,31 mg/kg) konnte Homocystein bestimmt werden. Da die Homocysteinkonzentrationen in diesen Beispiellebensmitteln mindestens um den Faktor 105 geringer waren als die Methioninkonzentrationen ist ein Einfluss von alimentärem Homocystein auf den Plasmaspiegel sehr unwahrscheinlich. Es wurde weiterhin geprüft, ob durch Darmbakterien ein Teil des alimentär aufgenommenen Methionins bereits im Dünndarm in Homocyt(e)in umgewandelt werden könnte. Dabei wurde eine vermehrte Homocysteinproduktion nach Methionin-Zugabe zu Dünndarmisolaten gefunden. Quantitativ kommt dieser Homocysteinquelle eine untergeordnete Bedeutung zu.
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5

Windmeier, Christoph. "Experimentelle und theoretische Untersuchungen zum Phasen- und Zersetzungsverhalten von Gashydraten /". Aachen : Shaker, 2009. http://d-nb.info/994942974/04.

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6

Urdang, Zachary D. "Towards Quinone Methids Releasing Disassembling Dendrimers". Thesis, The University of Arizona, 2010. http://hdl.handle.net/10150/146912.

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7

Reck, Andreas Michael [Verfasser], e Friedrich [Akademischer Betreuer] Schmahl. "Homocysteinstoffwechsel und Atherosklerose : Methionin-Belastungstests und langfristige Methionin-Applikation im Kaninchenmodell / Andreas Michael Reck ; Betreuer: Friedrich Schmahl". Tübingen : Universitätsbibliothek Tübingen, 2006. http://d-nb.info/1160754365/34.

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8

Franjesevic, Andrew Joseph. "Design, Synthesis, and Evaluation of Therapeutics for the Treatment of Organophosphorus Poisoning by Nerve Agents and Pesticides". The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1563349257142378.

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9

Millar, Valerie. "New extended methine dyes for application in laser technology". Thesis, University of Leeds, 1993. http://etheses.whiterose.ac.uk/1244/.

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Based on the known reverse saturable absorption properties of certain coumarin and long chain polymethine dyes, the synthesis of new related structures was undertaken in order to examine the relationships between structure and RSA activity. It was hoped that in this way, more effective RSA chromophores could be synthesised. In addition to RSA activity (at 532nm) the general light absorption and fluorescence characteristics of the new dye materials were examined. In the first series of dyes, the 7-diethylaminocoumarin system with extensively conjugated acceptor groups in the 3-position were examined. Several dyes with absorption maxima in the range 500-700nm were prepared, but none showed RSA properties at 532nm. The poor photostability properties of these dyes prompted the synthesis of related fused ring systems derived from 4-chloro-7-diethylamino-3-formyl-coumarin and in at least one example a marked improvement in photostability was achieved. In an attempt to move the absorption maxima of the coumarin dyes into the near infrared, chromophores with extended chains containing an isophorone bridge were introduced into the 3-position of the coumarin system. Although this gave greater conjugation and an increase in structural rigidity, Amax values could not be obtained at wavelengths greater than about 570nm, and photostability properties of the dyes were poor. Condensation of active methylene compounds with 2-chloro-l-formyl-3-hydroxymethylenecyclohexene led to the synthesis of a series of extended donoracceptor chromophores containing a chlorocyclohexene bridge, where the donor was the 1,3,3-trimethylindoline ring system. Absorption maxima of the dyes ranged from 620-860nm. However, none showed RSA properties and their photostability in cellulose acetate film was generally poor. In an attempt to improve photostability the intermediate formed from 2-methylene-l,3,3-trimethylindoline (Fischer's base) and 2-chloro-l-formyl-3-hydromethylenecyclohexene was condensed with active methylene compounds containing groups capable of intramolecular nucleophilic displacement of the chlorine atom. Thus under suitably forcing reaction conditions intramolecular cyclisation occurred, giving a series of extended donor-acceptor chromophores containing fused heterocyclic residues, the absorption maxima of these new chromophores ranging from 540-730nm. However, resultant increase in molecular rigidity did not give the expected improvement in photostability. In a further attempt to prepare RSA active chromophores, selected symmetrical polymethine dyes were synthesised and evaluated. All showed a measurable RSA effect at 532nm but in particular, near-infrared absorbing squarylium dye containing 2,3-dihydroperimidine end groups exhibited the greatest degree of RSA thus far observed. SCF -CI PPP-MO theory was applied to the theoretical qualitative prediction of the RSA properties of dye chromophores. Theoretical predictions were in good agreement with experimental observations, enabling a distinction to be made between dyes with high or zero RSA activity.
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10

Liu, Yang. "Selective delivery of a quinone methide precursor by peptide nucleic acids". College Park, Md. : University of Maryland, 2007. http://hdl.handle.net/1903/7809.

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Thesis (M.S.)--University of Maryland, College Park, 2007.
Thesis research directed by: Dept. of Chemistry and Biochemistry. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Libri sul tema "Methiin"

1

Mass.) Methuen Historical Commission (Methuen. Methuen. Charleston, SC: Arcadia Publishing, 1999.

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2

Christine, Ammer, a cura di. The Methuen dictionary of clichés. London: Methuen, 1992.

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3

Ammer, Christine. The Methuen dictionary of clichés. London: Methuen, 1994.

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Massachusetts. Education Management Audit Council. e Massachusetts. Office for Educational Quality and Accountability., a cura di. School district examination report: Methuen. [Boston, Mass.]: Education Management Audit Council, 2002.

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Commission, Methuen Historical. Methuen. Arcadia Publishing, 1999.

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Commission, Methuen Historical. Methuen. Arcadia Publishing, 1999.

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Joe, Orton. Loot: Methuen Student Edition (Methuen Drama). Methuen, 2007.

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Methuen (MA). Arcadia Publishing, 1999.

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Aksun, Belma. Yasliliga Methiye. Otuken, 2014.

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Methuen Drama. Methuen Drama, 1996.

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Capitoli di libri sul tema "Methiin"

1

Simms, William. "Methuen v Methuen". In Obscenity, Psychoanalysis and Literature, 46–61. London: Routledge, 2021. http://dx.doi.org/10.4324/9781003202509-3.

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Avery, Jocelyn D. "Methics". In An Ethnography of Severe Intellectual Disability, 41–69. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-32209-0_3.

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Sewell, A. C. "Methionin". In Lexikon der Medizinischen Laboratoriumsdiagnostik, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49054-9_2123-1.

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Sewell, A. C. "Methionin". In Springer Reference Medizin, 1630. Berlin, Heidelberg: Springer Berlin Heidelberg, 2019. http://dx.doi.org/10.1007/978-3-662-48986-4_2123.

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Nesari, Tanuja Manoj, Bhargav Bhide e Shivani Ghildiyal. "Fenugreek (Methika)". In Fenugreek, 5–16. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003082767-3.

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Jarrell, Richard A. "Petrie, Robert Methven". In Biographical Encyclopedia of Astronomers, 1693–95. New York, NY: Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4419-9917-7_9207.

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Laue, Thomas, e Andreas Plagens. "Di-π-Methan-Umlagerung". In Teubner Studienbücher Chemie, 101–3. Wiesbaden: Vieweg+Teubner Verlag, 1994. http://dx.doi.org/10.1007/978-3-322-94015-5_33.

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Laue, Thomas, e Andreas Plagens. "Di-π-Methan-Umlagerung". In Teubner Studienbücher Chemie, 105–7. Wiesbaden: Vieweg+Teubner Verlag, 1998. http://dx.doi.org/10.1007/978-3-322-94077-3_34.

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Laue, Thomas, e Andreas Plagens. "Di-π-Methan-Umlagerung". In Teubner Studienbücher Chemie, 101–3. Wiesbaden: Vieweg+Teubner Verlag, 1994. http://dx.doi.org/10.1007/978-3-322-94726-0_33.

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Wolany, Adalbert, Michael Bargende, Siegfried Bajohr, Frank Graf, Nantje T. Zimmermann, Janet Hochi, Reinhard Schultz et al. "Erdgas und erneuerbares Methan". In Erdgas und erneuerbares Methan für den Fahrzeugantrieb, 51–232. Wiesbaden: Springer Fachmedien Wiesbaden, 2015. http://dx.doi.org/10.1007/978-3-658-07159-2_4.

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Atti di convegni sul tema "Methiin"

1

Kadhim, Ali Ghazi, Murtadha Abid Ali Farahn e Raghad Mohammed Saleh. "Synthesis of new (azo methin)-dyes". In 2ND INTERNATIONAL CONFERENCE ON ENGINEERING & SCIENCE. AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0068911.

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Aramaki, Shinji, Yuko Okamoto, Tetsuo Murayama e Yuji Kubo. "Novel naphthoquinone methide dyes for poled polymers". In SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, a cura di Gustaaf R. Moehlmann. SPIE, 1994. http://dx.doi.org/10.1117/12.187501.

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Schröder, S., e H. Fritze. "1.7 - Gassensor zur Konzentrationsüberwachung von Methan bei Wärmebehandlungsprozessen". In 13. Dresdner Sensor-Symposium 2017. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2017. http://dx.doi.org/10.5162/13dss2017/1.7.

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Feng, Jinchao, Ming Jie Yang e Kebin Jia. "Investigation of an adaptive regularization parameter selection methodin bioluminescence tomography". In 2014 IEEE 11th International Symposium on Biomedical Imaging (ISBI 2014). IEEE, 2014. http://dx.doi.org/10.1109/isbi.2014.6867839.

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Wenz, J., F. Arndt, R. Gratzl, G. Fischer, AJ Beer e C. Solbach. "Loop-Methode zur Produktion von [11C]Methionin via [11C]Methyltriflat". In NuklearMedizin 2019. Georg Thieme Verlag KG, 2019. http://dx.doi.org/10.1055/s-0039-1683603.

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Qian, Wang, Yanming Zhao e Zhong Wen Tu. "Objective Audio Quality Evaluation Methon Based on Compressed Domain". In 2018 IEEE International Conference on Computer and Communication Engineering Technology (CCET). IEEE, 2018. http://dx.doi.org/10.1109/ccet.2018.8542306.

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Jalilian-Marian, Jamal. "Spinor helicity methids in DIS at small x: 3-parton production". In XXV International Workshop on Deep-Inelastic Scattering and Related Subjects. Trieste, Italy: Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.297.0074.

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Zeng, Xinyu, Chen Li, Bingkai Wang e Bo Chang. "Capillary Self-bending of Micro-manipulation Methon for Flexible Microfibers". In 2022 8th International Conference on Mechanical Engineering and Automation Science (ICMEAS). IEEE, 2022. http://dx.doi.org/10.1109/icmeas57305.2022.00033.

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Padmanaban, Munirathna, Ralph R. Dammel, SangHo Lee, Woo-Kyu Kim, Takanori Kudo, Douglas S. McKenzie e Dalil Rahman. "Performance of imide and methide onium PAGs in 193-nm resist formulations". In Microlithography 2003, a cura di Theodore H. Fedynyshyn. SPIE, 2003. http://dx.doi.org/10.1117/12.487738.

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Ritzel, Christian, Elmar Schmaelzlin, Christoph R. Braeuchle, Klaus Meerholz, Alexander Roessler, Christian Ernst, Juergen Wichern e Peter Boldt. "Systematic study on the optimization of the first hyperpolarizabilities of methine dyes". In SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, a cura di Manfred Eich e Mark G. Kuzyk. SPIE, 1999. http://dx.doi.org/10.1117/12.368276.

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Rapporti di organizzazioni sul tema "Methiin"

1

Bannink, A., e J. Dijkstra. Afwentelingen van methaan-mitigerendemaatregelen in melkvee. Wageningen: Wageningen Livestock Research, 2021. http://dx.doi.org/10.18174/547899.

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Booijen, Marith, Joost Wagensveld, Johan van Riel, Rudi de Mol e André Aarnink. Emissiereductie methaan, ammoniak en geur in varkensstallen met dagontmesting. Wageningen: Wageningen Livestock Research, 2023. http://dx.doi.org/10.18174/585141.

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Groenestein, C. M., J. Mosquera e R. W. Melse. Methaanemissie uit mest : schatters voor biochemisch methaan potentieel (BMP) en methaanconversiefactor (MCF). Wageningen: Wageningen Livestock Research, 2016. http://dx.doi.org/10.18174/401705.

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S̆ebek, L. B., J. Mosquera e A. Bannink. Rekenregels voor de enterische methaan-emissie op het melkveebedrijf en reductie van de methaan-emissie via mesthandling, het handelings-perspectief van het voerspoor inzichtelijk maken met de Kringloopwijzer. Wageningen: Wageningen Livestock Research, 2016. http://dx.doi.org/10.18174/391726.

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Gollenbeek, Luuk, e André Aarnink. Vooronderzoek naar de emissies van lachgas, ammoniak, methaan en aerosolen uit een mestbeluchtingsunit. Wageningen: Wageningen Livestock Research, 2020. http://dx.doi.org/10.18174/531067.

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van Boxmeer, Emma, Nico Verdoes, Leonie Workel, Jan Vonk e Jos Huis in ’t Veld. Emissies uit verse drijfmest, urine en feces van rundvee, varkens en kalveren : Onderzoek in klimaatrespiratiecellen naar emissies van ammoniak, lachgas, koolstofdioxide, methaan en niet-methaan vluchtige organische componenten, waaronder vluchtige vetzuren. Wageningen: Wageningen Livestock Research, 2024. http://dx.doi.org/10.18174/662243.

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Puente-Rodríguez, Daniel, Luuk Gollenbeek, Nico Verdoes e A. P. Bos. Perspectief van het aanzuren van mest in Nederland om methaan- en ammoniakemissie te reduceren. Wageningen: Wageningen Livestock Research, 2022. http://dx.doi.org/10.18174/572080.

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Veraart, Maayke, Herman van Schooten, Bas Bassa, Bert Philipsen e Cindy Klootwijk. Graslandmanagement voor reductie van methaan en ammoniak : Resultaten analyse KringloopWijzer 2020 van 12 pilotbedrijven. Wageningen: Wageningen Livestock Research, 2023. http://dx.doi.org/10.18174/644705.

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Mosquera, J., H. J. C. van Dooren, N. W. M. Ogink, E. A. P. van Well e G. J. Monteny. Monitoring van methaan-, ammoniak-, en lachgasemissies uit melkveestallen : Praktijkmetingen in de periode oktober 2018-februari 2020. Wageningen: Wageningen Livestock Research, 2021. http://dx.doi.org/10.18174/536752.

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Schep, C. A., H. J. C. van Dooren, J. Mosquera, E. A. P. van Well, J. A. Keuskamp e N. W. M. Ogink. Monitoring van methaan-, ammoniak- en lachgasemissies uit melkveestallen : Praktijkmetingen in de periode oktober 2018-oktober 2020. Wageningen: Wageningen Livestock Research, 2022. http://dx.doi.org/10.18174/576706.

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