Results 51 to 60 of about 19,839 (264)

Beyond right or wrong: How partial credit scoring on multiple‐choice questions improves student performance and assessment perceptions

British Journal of Clinical Pharmacology, EarlyView.
Aims In this study, we examined the effects of assigning partial credit to selected answer choices on student performance and perceptions in a pharmacology course using Type A multiple‐choice questions (MCQs). Methods Partial credit scoring was incorporated into quizzes and exams in a 10‐week pharmacology course for postbaccalaureate premedical ...
Stephen D. Schneid, Chris Armour, Katharina Brandl   +2 more
wiley   +1 more source

Hantzsch Synthesis of 2,6-Dimethyl-3,5-dimethoxycarbonyl-4-(o-methoxyphenyl)-1,4-dihydropyridine; a Novel Cyclisation Leading to an Unusual Formation of 1-Amino-2-methoxycarbonyl-3,5-bis(o-methoxyphenyl)-4-oxa-cyclohexan-1-ene

Molecules, 2007
Hantzsch condensation of two equivalents of methyl-3-aminocrotonate with (m-and p)-methoxybenzaldehyde afforded the expected products 2,6-dimethyl-3,5-dimethoxycarbonyl-4-(m-methoxyphenyl)-1,4-dihydropyridine and 2,6-dimethyl-3,5-dimethoxycarbonyl-4-(p ...
Vladimir Vinković, Ivica Cepanec, Mladen Litvić, Mirela Filipan-Litvić   +3 more
doaj   +1 more source

A stability-indicating high performance liquid chromatographic (HPLC) assay for the simultaneous determination of atorvastatin and amlodipine in commercial tablets [PDF]

, 2007
A simple, rapid, precise and accurate isocratic reversed-phase stability-indicating HPLC method was developed and validated for the simultaneous determination of atorvastatin (AT) and amlodipine (AM) in commercial tablets.
Ansari Dogaheh, M, Ghorbani Bidkorbeh, F, Hashem, M, Mohammadi, A, Rezanour, N, Walker, Roderick   +5 more
core   +1 more source

A Systematic Review on 1, 4-Dihydropyridines and its Analogues: An Elite Scaffold

Biointerface Research in Applied Chemistry, 2021
1,4-Dihydropyridines are a group of pyridine-based molecules possessing a magnificent set of biological and therapeutic potentials. Belonging to the class of calcium channel blockers, they are known to be effective in the conditions, angina, hypertension, myocardial infarction and show vasodilatory and cardiac depressant effects.
openaire   +1 more source

Shedding Light on Synthetic Autocatalysis: From Conventional Closed‐Shell Chemistries to Overlooked Open‐Shell Occurrences

Chemistry – A European Journal, EarlyView.
Why add another catalyst when the product itself holds the power to catalyze its own formation? Autocatalysis in synthetic chemistry enhances reaction efficiency and uncovers novel catalytic behavior across both closed‐shell and open‐shell systems, expanding reactivity and enabling innovative design strategies.
Jaspreet Kaur, Joshua P. Barham
wiley   +1 more source

Dimethyl 4-(4-ethoxyphenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate

Acta Crystallographica Section E, 2009
In the title molecule, C19H23NO5, the dihedral angle formed by the benzene ring and the planar part of the dihydropyridine ring is 83.52 (5)°. The dihydropyridine ring adopts a flattened boat conformation. In the crystal, molecules are
Hoong-Kun Fun, Ching Kheng Quah, B. Palakshi Reddy, S. Sarveswari, V. Vijayakumar   +4 more
doaj   +1 more source

Repurposing 1,4-Dihydropyridine Scaffold: 4-Imidazo[2,1-<i>b</i>]thiazole-Derivatives from Calcium Entry Blockers to a New Approach for Gut Dysfunctional Motility. [PDF]

Pharmaceuticals (Basel)
Camarda L, Corazza I, Locatelli A, Leoni A, Frosini M, Budriesi R, Carosati E, Santini A, Montagnani M, Marzetti C, Mattioli LB.   +10 more
europepmc   +3 more sources

Considerations for drug trials in hypertrophic cardiomyopathy

ESC Heart Failure, Volume 12, Issue 2, Page 1095-1112, April 2025.
Abstract Hypertrophic cardiomyopathy (HCM) is a heterogeneous condition with potentially serious manifestations. Management has traditionally comprised therapies to palliate symptoms and implantable cardioverter‐defibrillators to prevent sudden cardiac death. The need for disease‐modifying therapies has been recognized for decades.
John P. Farrant, Matthias Schmitt, Anna B. Reid, Clifford J. Garratt, William G. Newman, Aneil Malhotra, Rhys Beynon, Masliza Mahmod, Betty Raman, Robert M. Cooper, Dana Dawson, Thomas Green, Sanjay K. Prasad, Anvesha Singh, Susanna Dodd, Hugh Watkins, Stefan Neubauer, Christopher A. Miller   +17 more
wiley   +1 more source

Effective fabrication of poly(anilin-formaldehyde)-supported hybrid nanomaterial and catalytic synthesis of dihydropyridines [PDF]

Nanochemistry Research, 2019
In this study, Fe3O4@SiO2-PAF-SO3H nanocomposite was successfully fabricated by immobilization of sulfonic acid groups on the surface of poly(anilin-formaldehyde)-supported on magnetic Fe3O4@SiO2 nanoparticles through layer-by-layer assembly.
Mohammad Ali Bodaghifard, Zahra Faraki, Sajad Asadbegi   +2 more
doaj   +1 more source

Dearomatization with Axial‐to‐Central Chirality Conversion

European Journal of Organic Chemistry, EarlyView.
Atropisomers are exciting synthetic targets with unique properties, which find applications in many fields of chemistry. However, considering them as substrates is not very frequent, notably in the context of dearomatization reaction. We wish to discuss the different strategies for the dearomatization of aromatic atropisomers with axial‐to‐central ...
Morgane Mando, Clément Lemaitre, Thierry Constantieux, Xavier Bugaut   +3 more
wiley   +1 more source