Biomass and Extracts of Algae as Material for Cosmetics

The influence of fluorine position on the properties of fluorobenzoxaboroles

5-Fluoro-2,1-benzoxaborol-1(3H)-ol, a potent antifungal drug also known as Tavaborole or AN2690, has been compared with its three isomers in terms of its activity against several fungi as well as pKa and multinuclear NMR characterization. The molecular and crystal structure of 6-fluoro-2,1-benzoxaborol-1(3H)-ol was determined and compared with that of AN2690.

Novel 2,6-disubstituted phenylboronic compounds - Synthesis, crystal structures, solution behaviour and reactivity

Abstract 2,6-Diformylphenylboronic acid has been synthesized and characterized both in the solid state as well as in solution. In crystal, an unusual structural pattern has been found with the formation of intermolecular hydrogen bonds by B(OH) 2 and CHO groups as well as water molecules. In solution tautomeric equilibrium with the formation of oxaborole ring by one of the formyl groups was proved on the basis of multinuclear NMR spectroscopy. The title compound reacts with secondary mono- and diamines to form various types of substituted benzoxaboroles, which have been characterized by XRD and spectroscopic methods.

Supercritical Algal Extracts: A Source of Biologically Active Compounds from Nature

The paper discusses the potential applicability of the process of supercritical fluid extraction (SFE) in the production of algal extracts with the consideration of the process conditions and yields. State of the art in the research on solvent-free isolation of biologically active compounds from the biomass of algae was presented. Various aspects related with the properties of useful compounds found in cells of microalgae and macroalgae were discussed, including their potential applications as the natural components of plant protection products (biostimulants and bioregulators), dietary feed and food supplements, and pharmaceuticals. Analytical methods of determination of the natural compou…

Analysis of Green Algae Extracts

Supercritical fluid extraction of algae enhances levels of biologically active compounds promoting plant growth

The aim of this research was to screen plant growth biostimulant properties of supercritical CO2 macroalgal extracts. To this end secondary metabolites were isolated from the biomass of marine macroalgae from the Baltic Sea (species of Polysiphonia, Ulva and Cladophora). Chemical characteristics of the algal extracts were determined by inductively coupled plasma atomic emission spectroscopy for inorganic constituents and high-performance liquid chromatography and spectrophotometry for organic constituents. Inorganic (macro- and microelements) and organic (plant hormones: auxins and cytokinins; polyphenols) compounds were detected in the extract. Algal extracts were tested primarily on garde…

Identification and Ecology of Macroalgae Species Existing in Poland

“Twin” phosphorous atoms of tetraethyl 2-methyl-piperyd-1-ylmethylenebisphosphonates

Recently, bisaminophosphonates found applications as therapeutic agents for curing bone disorders. When trying to relate the structures of substituted piperid-1-ylmethylenebisphosphonic with their biological properties, non-typical findings that in 31P NMR spectra of 2-methyl-piperid-1-ylmethylenebisphosphonic and 2-ethyl-piperid-1-ylmethylenebisphosphonic acids, two separate singlets from each of the phosphonic groups were observed, while their analogues bearing substituent in position 3 exhibit only one signal. Their presence was explained by freezing of the molecular motions by strong hydrogen bonding between NH and P = O atoms. In this work, synthesis as well as spectroscopic and theore…

Valuable natural products from marine and freshwater macroalgae obtained from supercritical fluid extracts

The biologically active compounds (fatty acids, pigments, phenolics, and flavonoid content) were studied in supercritical fluid extracts from the biomass of marine (Ulva clathrata, Cladophora glomerata, Polysiphonia fucoides, and their multi-species mixture) and freshwater (C. glomerata) macroalgae. Different extraction techniques were used in order to compare differences in the biologically active compound composition of the macroalgal extracts. The results indicated that the saturated and unsaturated fatty acids ranged from C9:0 to C22:0. The analysis of differences in the composition of unsaturated to saturated fatty acids in extracts showed that palmitic acid (C16:0) and oleic acid (C18…

CCDC 1029677: Experimental Crystal Structure Determination

Related Article: Agnieszka Adamczyk-Woźniak, Krzysztof Ejsmont, Błażej Gierczyk, Ewa Kaczorowska, Alicja Matuszewska, Grzegorz Schroeder, Andrzej Sporzyński, Bartosz Zarychta|2015|J.Organomet.Chem.|788|36|doi:10.1016/j.jorganchem.2015.04.026

CCDC 1029678: Experimental Crystal Structure Determination

Related Article: Agnieszka Adamczyk-Woźniak, Krzysztof Ejsmont, Błażej Gierczyk, Ewa Kaczorowska, Alicja Matuszewska, Grzegorz Schroeder, Andrzej Sporzyński, Bartosz Zarychta|2015|J.Organomet.Chem.|788|36|doi:10.1016/j.jorganchem.2015.04.026

CCDC 1027467: Experimental Crystal Structure Determination

Related Article: Agnieszka Adamczyk-Woźniak, Małgorzata K. Cabaj, Paulina M. Dominiak, Patrycja Gajowiec, Błażej Gierczyk, Jacek Lipok, Łukasz Popenda, Grzegorz Schroeder, Ewelina Tomecka, Piotr Urbański, Dorota Wieczorek, Andrzej Sporzyński|2015|Bioorg.Chem.|60|130|doi:10.1016/j.bioorg.2015.05.004