Search results for: Lech Chmurzyński

Items from 1 to 20 out of 102 results

article

Metody wyznaczania krytycznego stężenia micelarnego związków powierzchniowo czynnych

Ola Grabowska, Paweł Dywicki, Lech Chmurzyński

Wiadomości Chemiczne > 2020 > [Z] 74, 5-6 > 371--390

Surface active agents, also known as surfactants, are a group of chemical compounds that are used in various products of the chemical industry. These compounds are components of medicines, detergents, motor oils and many others. The multitude of uses of surfactants makes it important to know their aggregation behaviour in solution. There are many methods used to analyse surfactants behaviour in liquid...

article

Współczesne zastosowania związków powierzchniowo czynnych

Paweł Dywicki, Ola Grabowska, Lech Chmurzyński

Wiadomości Chemiczne > 2020 > [Z] 74, 5-6 > 391--409

Surfactants have been known to mankind since the dawn of time. They have been used primarily as washing and cleaning agents. However, today they are used much more often in many fields of industry. This work focuses on two areas of surfactants use, the agriculture and the food industry due to the direct relationship between these two issues. In agriculture, surfactants play a number of important roles...

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Probing the binding selected metal ions and biologically active substances to the antimicrobial peptide LL-37 using DSC, ITC measurements and calculations

Joanna Makowska, Dariusz Wyrzykowski, Elżbieta Kamysz, Aleksandra Tesmar, more

Journal of Thermal Analysis and Calorimetry > 2019 > 138 > 6 > 4523-4529

Differential scanning calorimetry (DSC) and isothermal titration calorimetry (ITC) techniques have been used to describe physicochemical properties of polypeptide LL-37. LL-37 is a 37-residue, amphipathic, helical peptide, the only cathelicidin-derived antimicrobial peptide found in the human organism. Thermal stability of the LL-37 peptide in a water solution was measured by DSC over the 288.15–333...

article

Możliwości wykorzystania skórek z owoców w technologii przekąsek z pigwowca®

Hanna Kowalska, Ewelina Masiarz, Lech Chmurzyński

Postępy Techniki Przetwórstwa Spożywczego > 2019 > nr 2 > 72--79

W artykule przedstawiono możliwości wykorzystania odpadu, jakimi są skórki pigwowca japońskiego, w celu wytworzenia przekąsek. Wykonano badania dotyczące zmian aktywności wody, masy i barwy przy zastosowaniu różnych metod suszenia, poprzedzonych odwadnianiem osmotycznym. Przeprowadzono również ocenę sensoryczną, którą przyjęto za wskaźnik atrakcyjności oraz jakości produktu. Wykazano, że rodzaj roztworu...

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Zastosowanie polikarboksylanowych związków kompleksowych w tworzeniu sieci metaloorganicznych typu MOF

Dominika Zych, Joanna Drzeżdżon, Dagmara Jacewicz, Lech Chmurzyński

Wiadomości Chemiczne > 2019 > [Z] 73, 5-6 > 401--423

The first research on Coordination Polymers began at the beginning of the 20th century. Wider understanding of their structure has enabled the development of crystallography. Since then compounds, which belong to this group, have been the subject of broad-spectrum scientific research. A particular class of these compounds, known relatively recently, are Metal–Organic Frameworks (MOF). The MOF structure...

article

Metody in-vivo badania właściwości antyoksydacyjnych związków kompleksowych

Jacek Malinowski, Joanna Drzeżdżon, Lech Chmurzyński, Dagmara Jacewicz

Wiadomości Chemiczne > 2019 > [Z] 73, 7-8 > 523--538

This article describes the in-vivo methods of studying the antioxidant properties of complex compounds. The reduced glutathione (GSH) method, which uses the reactivity of the reduced form of GSH with free radicals, is among the described methods. Further the in-vivo methods are based on the use of antioxidant enzymes such as glutathione peroxidase, glutathione S-transferase, superoxide dismutase,...

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Oznaczanie aktywności przeciwutleniającej metodami in-vitro

Jacek Malinowski, Joanna Drzeżdżon, Lech Chmurzyński, Dagmara Jacewicz

Wiadomości Chemiczne > 2019 > [Z] 73, 9-10 > 523--542

In - vitro methods of determination of the antioxidant activity of complex compounds are very interesting and not fully investigated areas of knowledge from the borderline of chemistry and biology. Methods used for determination of the activity of antioxidant complex compounds are modified due to the conditions of the experiments in which they should be carried out, e.g. reactions at physiological...

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Crystal structure and isothermal titration calorimetry studies of new cobalt(II) complex with 2-methylnitrilotriacetate ion

Aleksandra Tesmar, Lech Chmurzyński

Inorganica Chimica Acta > 2018 > 482 > C > 554-560

The new cobalt(II) complex of a general formula{Na(H₂O)₂[Co(bcma)(H₂O)]·5H₂O}_n (bcma³⁻ = 2-methylnitrilotriacetate anion) has been synthesized and structurally characterized. The compound is isostructural with its nitrilotriacetate (nta³⁻) analogue, {Na(H₂O)₂[Co(nta)(H₂O)]·2H₂O}_n, and crystalize in the orthorhombic space group Pbca as the Co(II)-Na(I) heterometallic coordination polymer. In the structure...

article

Copper(II) complexation by fragment of central part of FBP28 protein from Mus musculus

Joanna Makowska, Krzysztof Żamojć, Dariusz Wyrzykowski, Wiesław Wiczk, more

Biophysical Chemistry > 2018 > 241 > C > 55-60

Steady-state and time-resolved fluorescence spectroscopy, UV spectrophotometry and isothermal titration calorimetry techniques were used to study the coordinating properties of the 17aa peptide fragment (D17) derived from the central part of the mouse formin binding protein (FBP28 with the PDB code: 1E0L) towards Cu²⁺ ions. All the measurements were run in the 2-(N-morpholino)ethanesulfonic acid buffer...

article

Geometric isomerism effect on catalytic activities of bis(oxalato)diaquochromates(III) for 2-chloroallyl alcohol oligomerization

Joanna Drzeżdżon, Lech Chmurzyński, Dagmara Jacewicz

Journal of Chemical Sciences > 2018 > 130 > 9 > 1-7

The cis- and trans-potassium bis(oxalato)diaquochromates(III) have been studied towards their catalytic activity for the 2-chloroallyl alcohol oligomerization. The geometric isomerism effect on the oligomerization products under mild reaction conditions has been investigated. The molecular masses and tactic structures of obtained poly(2-chloroallyl alcohols) have been compared and analyzed. The mechanisms...

article

Antioxidant and Cytoprotective Activity of Oxydiacetate Complexes of Cobalt(II) and Nickel(II) with 1,10-Phenantroline and 2,2′-Bipyridine

Agnieszka Piotrowska-Kirschling, Joanna Drzeżdżon, Anna Kloska, Dariusz Wyrzykowski, more

Biological Trace Element Research > 2018 > 185 > 1 > 244-251

The antioxidant properties of oxydiacetate complexes of cobalt(II) and nickel(II) with 1,10-phenantroline and 2,2′-bipyridine have been investigated towards the superoxide radical using the nitro blue tetrazolium chloride (NBT) test and the cyclic voltammetry (CV). Moreover, the biological activity of the complexes under study has been investigated in the Human Dermal Fibroblasts adult (HDFa) cell...

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Investigation of the Binding Properties of the Cosmetic Peptide Argireline and Its Derivatives Towards Copper(II) Ions

Joanna Makowska, Aleksandra Tesmar, Dariusz Wyrzykowski, Lech Chmurzyński

Journal of Solution Chemistry > 2018 > 47 > 1 > 80-91

Isothermal titration calorimetry, potentiometric titration and circular dichroism spectroscopy were used to study the interaction of copper(II) ions with Argireline (Ac-Glu-Glu-Met-Gln-Arg-Arg-NH₂) and three of its point mutation derivatives: Glu-Ala-Met-Gln-Arg-Arg-NH₂ (AN1), Glu-Ala-His-Gln-Arg-Arg-NH₂ (AN2) and Glu-Ala-Met-Gln-Ala-Arg-NH₂ (AN3). Under the experimental conditions (20 mmol·L⁻¹ Caco...

article

Kinetics and thermodynamics of the reaction of iminodiacetate copper(II) complexes with 1,10-phenanthroline and 2,2′-bipyridine in aqueous, anionic, cationic and nonionic surfactants solutions

Joanna Drzeżdżon, Agnieszka Piotrowska, Dariusz Wyrzykowski, Aleksandra Tesmar, more

Reaction Kinetics, Mechanisms and Catalysis > 2017 > 122 > 2 > 729-740

The kinetics and thermodynamics have been studied for the reactions of the copper(II) complexes with iminodiacetate (ida), 2,2′-bipyridine (bipy) and 1,10-phenanthroline (phen) as ligands. The kinetics of substitution reactions of two aqua ligands for bipy and phen in the [Cu(ida)(H₂O)₂] coordination compound has been studied in water and three type of aqueous solutions of the following surfactants:...

article

Structural characterization and biological properties of a new dinuclear oxidovanadium(IV) N-(phosphonomethyl)iminodiacetate complex with the 4-amino-2-methylquinolinium cation

Aleksandra Tesmar, Wiesława Ferenc, Dariusz Wyrzykowski, Artur Sikorski, more

Polyhedron > 2017 > 133 > C > 75-81

The crystal and molecular structures of a new dinuclear oxidovanadium(IV) complex with the N-(phosphonomethyl)iminodiacetate (pmida) ligand and the 4-amino-2-methylquinolinium ([amqH]⁺) cation of the molecular formula [amqH]₄[V₂O₂(pmida)₂]6H₂O have been determined. The phosphonate groups in the two pmida⁴⁻ ligands form two bridges between adjacent V⁴⁺ atoms, resulting in the formation of a [V₂O₂(pmida)...

article

Structures, physicochemical and cytoprotective properties of new oxidovanadium(IV) complexes -[VO(mIDA)(dmbipy)]·1.5H2O and [VO(IDA)(dmbipy)]·2H2O

Joanna Drzeżdżon, Dagmara Jacewicz, Dariusz Wyrzykowski, Iwona Inkielewicz-Stępniak, more

Journal of Molecular Structure > 2017 > 1143 > C > 515-525

New oxidovanadium(IV) complexes with a modification of the ligand in the VO²⁺ coordination sphere were synthesized. [VO(mIDA)(dmbipy)]∙1.5H₂O and [VO(IDA)(dmbipy)]∙2H₂O were obtained as dark green crystals and grey-green powder, respectively (mIDA = N-methyliminodiacetic anion, IDA = iminodiacetic anion, dmbipy = 4,4′-dimethoxy-2,2′-dipyridyl). The crystal structure of [VO(mIDA)(dmbipy)]·1.5H₂O has...

article

Structure and characterization of physicochemical and magnetic properties of new complex containing monobridged oxygen copper(II) dinuclear cation

Aleksandra Tesmar, Maciej Witwicki, Dariusz Wyrzykowski, Artur Sikorski, more

Polyhedron > 2017 > 127 > C > 144-152

The crystal and molecular structure of the new copper(II) complex with nitrilotriacetate (nta) and 1,10-phenanthroline (phen) ligands of the [Cu(phen)₂Cu(nta)(phen)]₂[Cu(Hnta)₂]·20H₂O molecular formula has been determined. The compound comprises the dianionic mononuclear entity, [Cu(Hnta)₂]²⁻, and two monocationic dinuclear units, [Cu(phen)₂Cu(nta)(phen)]⁺, in which the Cu(II) ions are bridged by...

article

Bonding interactions in oxydiacetate and thiodiacetate cobalt(II) and nickel(II) complexes

Aleksandra Tesmar, Iwona Anusiewicz, Lech Chmurzyński

Structural Chemistry > 2017 > 28 > 6 > 1723-1730

The influence of the central donor atom of the oxydiacetate and thiodiacetate ligands (oxygen and sulphur atoms, respectively) on the thermodynamic parameters for complexation reactions of the Co²⁺ and Ni²⁺ ions has been investigated using the isothermal titration calorimetry (ITC) technique and density functional theory (DFT) computations. The polarized continuum (PCM) - solvation model was employed...

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Structure, Physicochemical and Biological Properties of an Aqua (2,2′,2′′‐Nitrilotriacetato)‐oxidovanadium(IV) Salt with 4‐Methylpyridinium Cation

Aleksandra Tesmar, Dariusz Wyrzykowski, Katarzyna Kazimierczuk, Julia Kłak, more

Zeitschrift für anorganische und allgemeine Chemie > 643 > 7 > 501 - 510

The crystal structure of a nitrilotriacetate (nta) oxidovanadium(IV) salt with 4‐methylpyridinium cation, [4‐Me(Py)H]⁺, of [4‐Me(Py)H][VO(nta)(H₂O)] stoichiometry was determined. The complex comprises a discrete mononuclear [VO(nta)(H₂O)]^– coordination entity that can be rarely found among other known compounds containing nitrilotriacetate oxidovanadium(IV) moieties. The complex was characterized...

article

Simultaneous determination of thermodynamic and kinetic parameters of aminopolycarbonate complexes of cobalt(II) and nickel(II) based on isothermal titration calorimetry data

Aleksandra Tesmar, Dariusz Wyrzykowski, Eva Muñoz, Bogusław Pilarski, more

Journal of Molecular Recognition > 30 > 4 > n/a - n/a

The influence of the different side chain residues on the thermodynamic and kinetic parameters for complexation reactions of the Co²⁺ and Ni²⁺ ions has been investigated by using the isothermal titration calorimetry (ITC) technique supported by potentiometric titration data. The study was concerned with the 2 common tripodal aminocarboxylate ligands, namely, nitrilotriacetic acid and N‐(2‐hydroxyethyl)...

article

Characterization and cytotoxic effect of aqua-(2,2′,2′′-nitrilotriacetato)-oxo-vanadium salts on human osteosarcoma cells

Aleksandra Tesmar, Dariusz Wyrzykowski, Rafał Kruszyński, Karolina Niska, more

BioMetals > 2017 > 30 > 2 > 261-275

The use of protonated N-heterocyclic compound, i.e. 2,2′-bipyridinium cation, [bpyH⁺], enabled to obtain the new nitrilotriacetate oxidovanadium(IV) salt of the stoichiometry [bpyH][VO(nta)(H₂O)]H₂O. The X-ray measurements have revealed that the compound comprises the discrete mononuclear [VO(nta)(H₂O)]⁻ coordination ion that can be rarely found among other known compounds containing nitrilotriacetate...

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INFONA - science communication portal

Search results for: Lech Chmurzyński

Metody wyznaczania krytycznego stężenia micelarnego związków powierzchniowo czynnych

Współczesne zastosowania związków powierzchniowo czynnych

Probing the binding selected metal ions and biologically active substances to the antimicrobial peptide LL-37 using DSC, ITC measurements and calculations

Możliwości wykorzystania skórek z owoców w technologii przekąsek z pigwowca®

Zastosowanie polikarboksylanowych związków kompleksowych w tworzeniu sieci metaloorganicznych typu MOF

Metody in-vivo badania właściwości antyoksydacyjnych związków kompleksowych

Oznaczanie aktywności przeciwutleniającej metodami in-vitro

Crystal structure and isothermal titration calorimetry studies of new cobalt(II) complex with 2-methylnitrilotriacetate ion

Copper(II) complexation by fragment of central part of FBP28 protein from Mus musculus

Geometric isomerism effect on catalytic activities of bis(oxalato)diaquochromates(III) for 2-chloroallyl alcohol oligomerization

Antioxidant and Cytoprotective Activity of Oxydiacetate Complexes of Cobalt(II) and Nickel(II) with 1,10-Phenantroline and 2,2′-Bipyridine

Investigation of the Binding Properties of the Cosmetic Peptide Argireline and Its Derivatives Towards Copper(II) Ions

Kinetics and thermodynamics of the reaction of iminodiacetate copper(II) complexes with 1,10-phenanthroline and 2,2′-bipyridine in aqueous, anionic, cationic and nonionic surfactants solutions

Structural characterization and biological properties of a new dinuclear oxidovanadium(IV) N-(phosphonomethyl)iminodiacetate complex with the 4-amino-2-methylquinolinium cation

Structures, physicochemical and cytoprotective properties of new oxidovanadium(IV) complexes -[VO(mIDA)(dmbipy)]·1.5H2O and [VO(IDA)(dmbipy)]·2H2O

Structure and characterization of physicochemical and magnetic properties of new complex containing monobridged oxygen copper(II) dinuclear cation

Bonding interactions in oxydiacetate and thiodiacetate cobalt(II) and nickel(II) complexes

Structure, Physicochemical and Biological Properties of an Aqua (2,2′,2′′‐Nitrilotriacetato)‐oxidovanadium(IV) Salt with 4‐Methylpyridinium Cation

Simultaneous determination of thermodynamic and kinetic parameters of aminopolycarbonate complexes of cobalt(II) and nickel(II) based on isothermal titration calorimetry data

Characterization and cytotoxic effect of aqua-(2,2′,2′′-nitrilotriacetato)-oxo-vanadium salts on human osteosarcoma cells

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