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880  Articles
1 of 88 pages  |  10  records  |  more records»
New derivatives of natural compounds, galanthamine using in treatment of  Alzheimer’s disease and antitumor dimer alkaloids vinblastine and vincristine were synthesized. In the course of the reaction between galanthamine and diazomethane in the prese... see more

The Diels-Alder reaction of vindoline and methyl vinyl ketone resulted in a Friedel-Crafts reaction product. In the reaction between the ortho-quinone derivative of vindoline and N-phenylmaleimide, two anomalous products were obtained, a vindoline dimer, ... see more

El pintor y fotógrafo húngaro Lazslo Moholy-Nagy (1895-1946) publica Malerei, Fotografie, Film en 1925, como parte de la colección de libros de la Bauhaus (Bauhausbucher). Tras haberse formado en varias escuelas abiertas de arte, comienza a trabajar como ... see more

This paper addresses the mixed Couette-Poiseuille problem, that is the flow between two parallel plates, in the presence of simultaneous pressure gradient and wall motion. Instead of the wall-normal coordinate y, we use the local shear stress as our prima... see more

One of the challenges of the present century is to limit the greenhouse gas emissions for the mitigation of climate change which is possible for example by a transitional technology, CO2 geological storage. Clay minerals are considered to be responsible f... see more

Hungarian painter and photographer László Moholy-Nagy (1895-1946) published Malerei, Fotografie, Film in 1925 as part of the Bauhaus book series (Bauhausbucher). After attending several free art schools in his home country, Moholy-Nagy worked as a painter... see more

Reviewed by Péter Hargitai

This study aims to investigate and evaluate the status of sustainable development in the Fujian, Guangdong, and Zhejiang provinces over a decade (2011-2020) using the quantitative analysis approach of the entropy weight TOPSIS method. Based on the 12th an... see more

Commercial mountaineering has gained widespread popularity in recent decades. Global mountaineering challenges – e.g., the Seven Summits challenge to climb the highest summit of each continent – amplify this process, and also raise the profile of individu... see more

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