Mehta dhruti (68 risultati)

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Paperback. Condizione: Brand New. 84 pages. 8.66x5.91x0.19 inches. In Stock.

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Taschenbuch. Condizione: Neu. Chalconyl incorporated Schiff's bases of Sulphonamides | Synthesis and Biological evaluation of Chalconyl incorporated Schiff's bases of Sulphonamides | Dhruti Mehta (u. a.) | Taschenbuch | 84 S. | Englisch | 2016 | LAP LAMBERT Academic Publishing | EAN 9783659831522 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu.…

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Condizione: New. In English.

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Softcover/Taschenbuch. Condizione: Neu. Zusammenfassend l?sst sich sagen, dass die vorliegende Arbeit eine einfache und neuartige Methode zur Synthese von Chalconyl-integrierten Schiffschen Basen ohne Verwendung teurer Chemikalien und drastischer Bedingungen abschlie?t. Die Schmelzpunkte (?C) der synthetisierten Verbindungen wurden in offenen Kapillarr?hrchen bestimmt und sind unkorrigiert. Die Homogenit?t der Verbindung wurde durch aufsteigende D?nnschichtchromatographie (TLC) auf mit Kieselgel G beschichteten Aluminiumplatten ?berwacht, die durch Ioddampf sichtbar gemacht wurden. IR-Absorptionsspektren wurden mit Bruker alpha KBr diffuse Reflektion aufgezeichnet. 1H-NMR-Spektren wurden mit einem Bruker advance 400 NMR-Spektrometer bei 400 MHz aufgezeichnet. 1H-NMR- und IR-Spektren stimmten mit den zugewiesenen Strukturen ?berein. LC-Massenspektren der Verbindungen wurden mit Water, Q-TOF, Micromass (LC-MS) aufgezeichnet. Die meisten Verbindungen zeigten eine betr?chtliche antimikrobielle Aktivit?t, wie in der Bouillonverd?nnungsmethode im Vergleich zu Standardarzneimitteln angegeben. Verbindung X4 zeigte eine signifikante antibakterielle Aktivit?t und der Rest zeigte eine geringe Aktivit?t gegen den Test. Daher ist die Art der Gruppen in der Chalkon-Einheit f?r die antimikrobielle Aktivit?t sehr wichtig. Verbindung X1 zeigte eine m??ige antimykotische Aktivit?t, w?hrend der Rest keine zeigte. De Gewicht in Gramm: 137.…

Taschenbuch. Condizione: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - The overview on New antibiotc introduced in market after 25 yrs of research which kills the bacteria without detectable resistance. The new antibiotic introduced is termed as Teixobactin. The different methods for its synthesis and various studies performed on it are enclosed here along with the different identification methods and its uses which will provide sufficient information for the researches for further studies in the future. This product might be commercialized without leaving trace of the pathogens.…

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Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -In summary, the present work concludes a simple and novel method for the synthesis of Chalconyl incorporated Schiff's bases without using any costly chemicals and any drastic conditions. Melting points (_C) of the synthesized compounds was determined in open capillary tubes and are uncorrected. The homogeneity of compound was monitored by ascending Thin Layer Chromatography (TLC) on silica gel G coated aluminum plates, visualized by iodine vapor. IR absorption spectra were recorded on Bruker alpha KBr diffuse reflectance. 1H NMR spectra were recorded on Bruker advance 400 NMR spectrometer at 400 MHz. 1H NMR and IR spectra were consistent with the assigned structures. LC mass spectra of the compounds were recorded on Water, Q-TOF, Micromass (LC-MS). Most of the compounds have displayed considerable antimicrobial activity as indicated in Broth dilution method in comparison with standard drug. Compound X4 showed significant antibacterial activity and rest showed poor activity against the test. Therefore the nature of groups in chalcone moiety is very important for antimicrobial activity. Compound X1 showed moderate antifungal activity while the rest showed its absence. 84 pp. Englisch.…

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