Tag Archives: flavonoids

The biotechnological potential of cyanobacteria forming blue-green algal blooms

The biotechnological potential of cyanobacteria forming blue-green algal blooms
KASOWSKA-ŻOK E., OSTROWSKA M., STUDNIK h., BALCERZAK L ., ŻYSZKA B., DRZYZGA d., BAZGIER G., KAFARSKI P., LIPOK J.

Please cite as: CHEMIK 2014, 68, 4, 355–362

Cyanobacteria adaptability related to their specific „flexible” metabolism that characterizes these microorganisms enables their use as biocatalysts in biotransformation processes of natural and synthetic compounds. Other qualities of blue-green algae allow to use them in bioremediation of metal ions, during which nanoparticles of these elements are also produced. Mentioned possibilities indicate significant biotechnological potential of cyanobacteria.

Keywords: blue-green algal blooms, cyanobacteria, biotransformation, aminopolyphosphonates, metal nanoparticles, monoterpens, flavonoids

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Chemistry and pharmacy closer to nature. How to prolong healthy life with natural compounds?

Chemistry and pharmacy closer to nature. How to prolong healthy life with natural compounds?

Iwona WAWER ? Medical University of Warsaw, Faculty of Pharmaceutical, Department of Physical Chemistry, Warsaw Please cited as: CHEMIK 2010, 64, 4, 219-227 Modern medicine (especially personalised and nutritional approach) focuses more attention on the diet, life style and the environment. Scientists have to examine more closely what we are eating, how diseases can be treated more rationally, and how we can more effectively use our natural resources. The pharmaceutical industry is searching for new medical plants, the functional compounds of which can serve as a starting point for the development of new drugs. Health-beneficial and life-prolonging effects of polyphenols are accompanied by the stimulation of various maintenance mechanisms, including protection against free-radical and oxidation- induced damage. These natural compounds are promising anti-inflammatory, antiviral, antibacterial and anticancer agents. The representatives of polyphenols: resveratrol, epigallocatechin-gallate, curcumin, proanthocyanidin, chlorogenic acid and rosemarinic acid, betalain, anthocyans are characterised as potential candidates for drugs. This review provides some information and serves to encourage work (chemical synthesis) in...
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Study of antioxidant properties of green tea extract

Study of antioxidant properties of green tea extract SIKORA E., OGONO WSKI J. Please cite as: CHEMIK 2011, 65, 10, 968-973 The aim of this work was the study of antioxidant properties of green tea extracts. Effect of kind of the solvent (ethyl alcohol, propylene glycol and water) and types of extraction (extraction in Soxlet apparatus and maceration) on the content of quercetin-3-rutinoside and the antioxidant efficiency of the extracts were investigated using UV-vis spectroscopy. The antioxidant properties were determinate on the basis of easurements of the colour intensity of thiocyanate complex which were formed in the mixture of linolic acid, FeCl2 and the extracts. The obtained results showed that alcoholic extract has the highest rutine concentration and exhibited the highest antioxidant properties. Keywords: antioxidants, flavonoids, green tea Read more: pdf-icon...
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Rosemary ? a plant rich in biologically active compounds

Krystyna NOWAK, Małgorzata JAWORSKA, Jan OGONOWSKI Institute of Chemistry and Organic Technology, Cracow University of Technology, Cracow, Poland Abstract: The aim of this study is to present the characteristics of biologically active compounds contained in the rosemary (such as rosemary oil, flavonoids, terpenes, phenolic acids) and their use in pharmaceutical, cosmetic and food industries. Please cite as: CHEMIK 2013, 67, 2, 133-138 Introduction Rosemary ( Rosmarinus officinalis L.) is an aromatic, evergreen plant which grows in the wilderness on the coasts of Mediterranean Sea and in the southern part of Crimea. In Poland the only possibility is to grow it in a greenhouse. Rosemary used to be well known and grown in the ancient times. The Romes called it a flower of the sea. Its name derives from Latin from words rosa- rose and marinus ? nautical. The well smelled scent of rosemary on the seas indicated the moment of approaching a shore. The most recognizable herbalist of Middle Ages, Saint Hildgerard from Bingen...
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