نتایج جستجو برای: coumarin

تعداد نتایج: 3800  

2012
Jana Blahová Zdeňka Svobodová

The objective of this study was to determine the coumarin content of ground cinnamon purchased from retail markets in the Czech Republic. No sample was labelled with information on the botanical source, but, in some cases, the countries of origin were specified. For comparison, a single cinnamon sample imported directly from a plantation in Sri Lanka that came from Cinnamomum verum was analyzed...

Journal: :Physical chemistry chemical physics : PCCP 2013
Julien Andres Anne-Sophie Chauvin

A series of lanthanide complexes [Ln(dpxCy)3](3-) have been synthesised. The ligands are composed of a coordinating dipicolinic acid backbone decorated with a polyoxyethylene arm fitted with a coumarin moiety at its extremity. The nature of the coumarin as well as the length of the linker have been varied. Upon excitation at 320 nm, the coumarin exclusively acts as an antenna while the dipicoli...

Journal: :The Journal of clinical investigation 1961
P G DAYTON Y TARCAN T CHENKIN M WEINER

Wide individual variations in response to drugs is a common clinical problem, and is especially evident with coumarin anticoagulant therapy (1-3). A possible contributing factor to such variations could be the influence of another presumably unrelated drug upon the response to the coumarin anticoagulant. Reports from several laboratories (4-7) indicate that barbiturates can reduce the prothromb...

Journal: :Molecules 2016
Shwu-Chen Tsay Shu-Yu Lin Wen-Chieh Huang Ming-Hua Hsu Kuo Chu Hwang Chun-Cheng Lin Jia-Cherng Horng I-Chia Chen Jih Ru Hwu Fa-Kuen Shieh Pieter Leyssen Johan Neyts

A series of new conjugated compounds with a -SCH₂- linkage were synthesized by chemical methods from imidazole and coumarin derivatives. The experimental results indicate that of the twenty newly synthesized imidazole-coumarin conjugates, three of them exhibited appealing EC50 values (5.1-8.4 μM) and selective indices >20 against hepatitis C virus. Their potency and selectivity were increased s...

2012
U. S. Raikar

Absract: Rotational dynamics of two structurally similar coumarins; coumarin 7 and coumarin 30 has been studied using a steady state fluorescence depolarization technique and time correlated single photon counting method as a function of temperature in ethanol and n-decane solvents. Experimentally measured reorientation times of these coumarins are identical in a given solvents at a particular ...

2012
Hasnah Osman Afsheen Arshad Chan Kit Lam Mark C Bagley

UNLABELLED BACKGROUND Coumarin derivatives exhibit a wide range of biological properties including promising antioxidant activity. Furthermore, microwave-assisted organic synthesis has delivered rapid routes to N- and O-containing heterocycles, including coumarins and thiazoles. Combining these features, the use of microwave-assisted processes will provide rapid access to a targeted coumarin...

Journal: :The Analyst 2014
Susanne Widmer Marko Dorrestijn Agathe Camerlo Špela Korent Urek Aleksandra Lobnik Catherine E Housecroft Edwin C Constable Lukas J Scherer

This study focuses on the development of an optical ammonia gas sensor, the sensing mechanism of which is based on Förster resonance energy transfer (FRET) between coumarin and fluorescein. The dyes were immobilized into an organically modified silicate matrix during polymerizing methyltriethoxysilane with trifluoropropyltrimethoxysilane on a poly(methyl methacrylate) substrate. The resulting d...

Journal: :iranian journal of catalysis 2013
somnath s. gholap umesh p. deshmukh macchindra s. tambe

an efficient synthesis of some novel coumarin derivatives via 1, 4- michael addition of indole to coumarin chalcones catalyzed by cellulose sulphonic acid (csa) under solvent free conditions is described. the corresponding michael addition products were obtained in good to excellent yield. the synthesized compounds were screened for their antibacterial activity against e. coli, s. aureus and an...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 1994
H Burghardt H Brunner R Oelmüller F Lottspeich U Oster W Rüdiger

Cress (Lepidium sativum) seeds were germinated in darkness. Seedlings were investigated for soluble proteins by SDS-PAGE. Two proteins were identified by microsequencing: the small subunit of ribulosebisphosphate carboxylase (SSU) and the alpha subunit of the storage protein cruciferin. Net synthesis of small and large subunits of ribulosebisphosphate carboxylase (SSU and LSU) was investigated ...

2012

P . R o d i g h i e r o , A . G u i o t t o * , P . M a n z i n i , a n d G . P a s t o r i n i Ist ituto di Chimica Farmaceutica dell 'Universita di Padova , Centro di Studio della Chimica del Farmaco e dei Prodott i Bio logicamente attivi del C N R , V ia Marzolo 5, 1-35100 Padova , I taly Z. Naturforsch. 34b , 1010-1014 (1979); received February 19, 1979 Isoponcimarin, Isomeranzin, Dihydroor...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید