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Wyniki wyszukiwania dla: cadmium(ii) compounds
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FPGA implementation of reverse residue conversion based on the new Chinese Remainder Theorem II- Part I
PublikacjaW pracy opisano implementację algorytmu konwersji z systemu resztowego do systemu binarnego opartą na nowej formie chińskiego twierdzenia o resztach określanego jako CRT II.Nowa forma CRT nie wymaga operacji modulo M , gdzie M jest zakresem liczbowym systemu resztowego, jednak wymagana jest pewna liczba mnożników. W środowisku FPGA jest zwykle dostępne są mnożniki, stąd mogą być one wykorzystane do realizacji konwertera. Głównym...
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Bromo(dithiobenzoato-k2S,S')tris(tetrahydrofuran-kO)magnesium(II): a redetermination
PublikacjaZwiązek [MgBr(C6H5CS2)(C4H8O)3]zawiera ligand ditiobenzoesowy. Dzięki pomiarom rentgenograficznym w niskiej temperaturze została określona struktura tego związku. Kompleks posiada zniekształconą geometrię oktaedryczną.
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Cyanogenic Compounds and Estrogen Disruptors
PublikacjaBalanced diet consists largely of plants containing cyanogenic compounds in the form of the more common cyanogenic glycosides and sometimes lipids. Maize, wheat, rye, apples, barley, oats, sugar cane and yet many other plants consumed by humans contain cyanogenic compounds. However the risk of poisoning is negligible as it is very easy to remove the toxic HCN by grinding and drying in air or soaking in water and an additional...
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Novel Diazocrowns with Pyrrole Residue as Lead(II) Colorimetric Probes
PublikacjaNovel 18- and 23-membered diazomacrocycles were obtained with satisfactory yields by diazocoupling of aromatic diamines with pyrrole in reactions carried under high dilution conditions. X-ray structure of macrocycle bearing five carbon atoms linkage was determined and described. Compounds were characterized as chromogenic heavy metal ions receptors. Selective color and spectral response for lead(II) was found in acetonitrile and...
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Polyphenolic Compounds from Rubus saxatilis
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Właściwości katalityczne i biomedyczne związków zawierających jony rutenu(II) oraz rutenu(III)
PublikacjaRuthenium complexes appear in scientific publications mainly as catalysts in the olefins metathesis process. In this review, we want to indicate the research niche regarding the use of ruthenium(II) and ruthenium(III) complexes in other catalytic processes, i.e. polymerization or epoxidation of olefins and depolymerization. We would like to combine the catalytic properties of ruthenium(II,III) complex compounds with their biomedical...
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State of the art and prospects of methods for determination of lipophilicity of chemical compounds
PublikacjaLipophilicity of the compounds is useful to (i) explain their distribution in biological systems, which is different in plant and in animal organisms, (ii) predict the possible pathways of pollutant transport in the environment, and (iii) support drug discovery process and select optimal composition in terms of bioactivity and bioavailability. The lipophilic properties can be determined by two main approaches, experimental, which...
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The Fate of BTEX Compounds in Ambient Air
PublikacjaAs a result of the industrialization and urbanization in the world, human pressure on the environment is intensifying, leading to detrimental changes in both biotic and abiotic compartments. One of the many consequences of this state of affairs is the increasing rate of emission into the atmosphere of volatile organic compounds, including the so-called BTEX (benzene, ethylbenzene, toluene, xylenes) compounds. The authors review...
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(2,2'-Bipyridine)bis(tri-tert-butoxysilanethiolato-kS)lead(II) and (4,7-diphenyl-1,10-phenanthroline-k2N,N')bis(tri-tert-butoxysilanethiolato-kS)lead(II) benzene hemisolvate
PublikacjaWyznaczono i opisano struktury rentgenowskie tytułowych związków. Atom ołowiu w obu przypadkach wykazuje koordynację typu zniekształconej piramidy kwadratowej o rdzeniu PbON2S2 w której jeden z atomów siarki leży w pozycji osiowej. Struktury są stabilizowane przez oddziaływania międzycząsteczkowe typu pi-pi oraz C-H...pi.
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Biomimetic zinc(II) and cobalt(II) complexes with tri-tert-butoxysilanethiolate and imidazole ligands - structural and spectroscopic studies.
PublikacjaNowe heteroleptyczne kompleksy tri-tert-butoksysilanotiolanowe Zn(II) i Co(II) z dodatkowymi ligandami imidazolowymi zostały scharakteryzowane strukturalnie i spektralnie. Otrzymano kompleksy o różnych centrach koordynacji w zależności od ligandów imidazolowych. Dla jonów Co(II)otrzymano kompleksy o rdzeniach: NOS2 (z cząsteczką metanolu jako O-donorowy ligand) w związku 2', NO2S2 w 2'', N2S2 w 1, zaś w przypadku jonów Zn(II):...
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Organotin Compounds: Environmental Fate and Analytics
PublikacjaFor more than 50 years, organotin compounds have been used in almost all sectors of industry. As a consequence, specific environmental compartments are affected by the emission of these xenobiotics. The emissions of organotin compounds into the environment from paints used in the shipbuilding industry for ship hull coating, and from the plant protection products are particularly significant.In 2001, the IMO introduced a global...
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Spin and Orbital Effects on Asymmetric Exchange Interaction in Polar Magnets: M(IO3)2 (M = Cu and Mn)
PublikacjaMagnetic polar materials feature an astonishing range of physical properties, such as magnetoelectric coupling, chiral spin textures, and related new spin topology physics. This is primarily attributable to their lack of space inversion symmetry in conjunction with unpaired electrons, potentially facilitating an asymmetric Dzyaloshinskii–Moriya (DM) exchange interaction supported by spin–orbital and electron–lattice coupling. However,...
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Nonprotein nitrogenous compounds
PublikacjaThe non-protein nitrogen (NPN) fraction is an important group of food components for both technological and nutritional reasons. Free amino acids (FAAs), oligopeptides, amines, nucleic acids, and nucleotides, as well as other low-molecular nitrogen-containing components (cyanogenic glycosides, alkaloids, thiazoles, oxazoles, pyrroles, and pyrazines), are found in most foods. Their content depends on many factors, starting from...
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(1,2-Dimethoxyethane-kO)bis(tri-tert-butoxysilanethiolato-k2O,S)chromium(II)
PublikacjaW tytułowym związku kompleksowym atom chromu jest koordynowany przez jeden z atomów tlenu z cząsteczki 1,2-dimetoksyetanu oraz ligand tri-tert-butoksysilanotiolanowy. Geometrię ligandu wokół atomu chromu można opisać jako piramidę o podstawie kwadratu z cząsteczką 1,2-dimetoksyetanu w pozycji wierzchołkowej.
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Preliminary Results from the Removal of Phosphorus Compounds with Selected Sorption Material
PublikacjaDue to the resources of phosphorous are limited and are exhausted in the next 30 years the management of the resources is become current issue. Most of the phosphorus compounds is lost forever, because it is discharged with sewage into surface waters, causing eutrophication and in this way causing a further problem and challenge. On the other hand, there is a considerable need for phosphorus compounds, primarily in bioavailable...
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Environmental fate of BTEX compounds in ambient air
PublikacjaAs a result of the industrialization and urbanization in the world, human pressure on the environment is intensifying, leading to detrimental changes in both biotic and abiotic compartments. One of the many consequences of this state of affairs is the increasing rate of emission into the atmosphere of volatile organic compounds, including the so-called BTEX (benzene, ethylbenzene, toluene, xylenes) compounds. The article reviews...
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Starch–metal complexes and metal compounds
PublikacjaRecently, metal derivatives of starch evoked considerable interest. Such metal derivatives can take a form of starch compounds bearing metal atoms and metal carrying moieties either covalently bound or complexed. Starch metal complexes may have a character of either Werner, inclusion, sorption or capillary complexes. In this publication, preparation, structure, properties and numerous current and potential applications of those...
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Azo group(s) in selected macrocyclic compounds
PublikacjaAzobenzene derivatives due to their photo- and electroactive properties are an important group of compounds finding applications in diverse fields. Due to the possibility of controlling the trans–cis isomerization, azo-bearing structures are ideal building blocks for development of e.g. nanomaterials, smart polymers, molecular containers, photoswitches, and sensors. Important role play also macrocyclic compounds well known for...
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Structural motifs in the Cu(II), Mn(II) and Zn(II) complexes based on N,N,N-donor dipodal or N,N,N,N-donor tripodal ligands obtained in situ: Synthesis, crystal structures and xanthine oxidase inhibition properties
PublikacjaA series of four novel transition metal complexes, [Cu(NCS)2L1] (1), [Mn(NCS)2L1] (2) where L1 = bis(1-(3,5-dimethylpyrazolyl)methyl)amine, [Mn(NCS)2L2] (3) and [Zn(NCS)L2]2[Zn(NCS)4] (4) where L2 = tris(1-(3,5-dimethylpyrazolyl)methyl)amine, has been obtained in situ by a one-step, one-pot synthetic path starting from 1-hydroxymethyl-3,5-dimethylpyrazole (L). The isolated complexes were fully characterised by elemental analysis,...
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Cadmium and lead toxicity and bioaccumulation in Microcystis aeruginosa
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Antioxidants as a Potential Preventive and Therapeutic Strategy for Cadmium
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Influence of manganese(II) silanethiolate with 1,10-phenathroline on properties of natural rubber vulcanizates
PublikacjaW komunikacie zaprezentowano wstępne wyniki badań dotyczących wpływu kompleksu [Mn{SSi(OBu-t)3}2(phen)] na właściwości wulkanizatów gumowych z kauczuku naturalnego. Przeprowadzone badania sugerują, że chociaż związek ten nie działa bezpośrednio jako przyspieszacz, to aktywuje wulkanizację przy użyciu tiuramu.
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Two isomorphic ZnII/CoII complexes with tri-tert-butoxysilanethiol and histamine, and (4-hydroxymethyl-1H-imidazole-κN)bis(tri-tert-butoxysilanethiolato-κ2O,S)zinc(II)
PublikacjaOtrzymano dwa izomorficzne kompleksy cynku(II) i kobaltu(II) z tri-tert-butoksysilanotiolem i histaminą oraz kompleks cynku(II) z tri-tert-butoksysilanotiolem i 4(5)-hydroksymetyloimidazolem. Scharakteryzowano strukturę otrzymanych kompleksów w ciele stałym.
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Jedno- i wielordzeniowe heteroleptyczne silanotiolany Co(II) i Ni(II) - badania strukturalne, spektroskopowe i magnetyczne
PublikacjaDoniesienia literaturowe wskazują na możliwość zastosowania związków kompleksowych Co(II) i Ni(II) jako jednocząsteczkowe magnesy molekularne (SMM). Wysiłki naukowców skupiają się na poznaniu zależności pomiędzy strukturą molekularną związków, a ich właściwościami magnetycznymi. Znane są przykłady związków typu SMM opartych na jonach Co(II) i Ni(II), w których metal koordynowany jest przez miękkie S-donorowe ligandy tiolanowe,...
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Thermal analysis of copper(II) complexes of general formula [Et4N]2[CuBrnCl4-n]
PublikacjaBadano dekompozycję termiczną związków składających sie z anionów: [CuBrnCl4-n]2- (n=0-4) i kationów tetrametyloamoniowych. Stosowano następujące metody badawcze: TG-FTIR, TG-MS, DTA i DTG. Pomiary przeprowadzono w atmosferze argonu i powietrza w zakresie temperatur od 293 K do 1073 K. Produkty dekompozycji identyfikowano metoda spektroskopii w podczerwieni (IR i FIR) oraz metodą dyfrakcji promieniowania rentgenowskiego.
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Ultrasound-assisted deep eutectic solvent-based liquid–liquid microextraction for simultaneous determination of Ni (II) and Zn (II) in food samples
PublikacjaA new approach was developed for the simultaneous pre-concentration and determination of Ni (II) and Zn (II) in food samples. This method is based on ultrasound-assisted liquid–liquid micro extraction using hydrophobic deep eutectic solvent (DES) and 1,10-phenanthroline as chelating agent. The effect of several parameters, such as pH, selection and volume of DES, amount of chelating agent, time of sonication and centrifugation,...
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Targeting DNA Topoisomerase II in Antifungal Chemotherapy.
PublikacjaTopoisomerase inhibitors have been in use clinically for the treatment of several diseases for decades. Although those enzymes are significant molecular targets in antibacterial and anticancer chemotherapy very little is known about the possibilities to target fungal topoisomerase II (topo II). Raising concern for the fungal infections, lack of effective drugs and a phenomenon of multidrug resistance underlie a strong need to expand...
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Recent breakthroughs in the stability testing of pharmaceutical compounds
PublikacjaPharmaceutical development is mostly focused on the research leading to approval of a new and viable active substance. However, there is a number of old generation compounds that are still being used in contemporary medicinal practice. So that new analytical developments should cover not only the safety of newly developed drug substances, which is obvious, but should also be directed into the search of individual stability issues...
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Analysis of muscles behaviour. Part II. The computational model of muscles group acting on the elbow joint
PublikacjaThe purpose of this paper is to present the computational model of muscles' group describing the movements of flexion/extension at the elbow joint in the sagittal plane of the body when the forearm is being kept in the fixed state of supination/pronation. The method ofevaluating the muscle forces is discussed in detail. This method is the basis for the quantitative and qualitative verification of the proposed computational model...
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Catalytic topoisomerase II inhibitors in cancer therapy.
PublikacjaDNA topoizomeraza II jest jednym z głównych celów molekularnych dla leków stosowanych w terapii przeciwnowotworowej. Wszystkie inhibitory tego enzymu są zdolne do zakłócania w jeden z etapów cyklu katalitycznego topoizomerazy II. Związki, które stabilizują kowalencyjny kompleks DNa i topoizomerazy II (znany jako kompleks rozszczepialny) są nazywane truciznami topoizomerazy, inne związki, które hamują aktywność enzymu na innych...
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Structural analysis and physico-chemical characterization of mononuclear manganese(II) and polynuclear copper(II) complexes with pyridine-based alcohol
PublikacjaTwo novel manganese(II) and copper(II) complexes, mononuclear [Mn(H2O)2(2-(CH2)2OHpy)2](NO3)2 (1) and polynuclear [Cu(SO4)(2-(CH2)2OHpy)2]n (2), based on 2-(hydroxyethyl)pyridine (2-(CH2)2OHpy) were synthesised and fully characterised using X-ray structure analysis as well as spectroscopic, magnetic and thermal methods. Both central metal ions Mn(1) and Cu(1) are coordinated by two N,O-donor 2-(CH2)2OHpy ligands and possess an...
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Endocrine Disrupting Compounds – Problems and Challenges
PublikacjaIn this chapter, information about some of the estrogenic compounds and their environmental fate and biological influence can be found. Special attention is paid to the review of the analytical approaches used at the stages of detection and determination of Endocrine Disrupting Compounds (EDCs) in the environmental samples. Also, a brief characterization of both cellular and non-cellular bioassays is presented. The discovery of...
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Badanie efektywności mechanizmu HARQ II
PublikacjaW referacie zostały przedstawione hybrydowe mechanizmy realizujące retransmisje błędnie odebranych bloków (HARQ). Przedstawiono również wyniki badań symulacyjnych hybrydowego mechanizmu retransmisyjnegoHARQ II w interfejsie radiowym z modulacją 8PSK i kodowaniem splotowym o sprawności 1/3.
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The use of fungi in biofiltration to remove hydrophobic volatile organic compounds
PublikacjaThe growing importance placed on air quality by environmental regulations and public opinion necessitate the minimization and removal of volatile organic compound emissions (VOCs), including odours. The removal of hydrophobic VOCs from the air by biological methods remains a major technical challenge (despite its importance in the shift to green engineering). A potential solution to this challenge is the use of fungi in biofiltration....
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Lower rim substituted tert-Butylcalix[4]arenes. Part 13. Interaction of calix-hydroxamates with Fe(III) and Pb(II); studies in ion-selective membrane electrodes (ISE)
PublikacjaPrzedmiotem pracy są badania oddziaływań pomiędzy trzema wybranymi hydroksamowymi pochodnymi t-butylo-kaliks[4]arenu i jonami metali z wykorzystaniem membranowych elektrod jonoselektywnych (ISE). Elektrody zawierające jako materiał aktywny wymienione związki jonoforowe charakteryzują się nernstowskim nachyleniem i szerokim zakresem liniowości na jony Pb(II), a także dobrą selektywnością na jony Pb(II)w stosunku do jonów UO2(II),...
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Analysis and characterization of coordination compounds by resonance Raman spectroscopy
PublikacjaResonance Raman spectroscopy has become a powerful tool to study excited-state geometries, excited-state charge distributions and photoinduced reaction dynamics in coordination compounds. Due to their rich photophysical properties coordination compounds are utilized for a variety of applications ranging from DNA sensing to photocatalysis. This review features recent applications of various resonance Raman scattering techniques...
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Targeting yeast topoisomerase II by imidazo and triazoloacridinone derivatives resulting in their antifungal activity
PublikacjaFungal pathogens are considered as serious factors for deadly diseases and are a case of medical concern. Invasive fungal infections also complicate the clinical course of COVID-19, leading to a significant increase in mortality. Furthermore, fungal strains' multidrug resistance has increased the demand for antifungals with a different mechanism of action. The present study aimed to identify antifungal compounds targeting yeast...
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Mutagenic and Carcinogenic Compounds in Food
PublikacjaFood is a major environmental human cancer risk factor. One of the reasons for this is that food products contain substances that exhibit mutagenic and carcinogenic potential which may induce the transformation of normal somatic cells into cancerous cells. These compounds occur in food as a result of microbial contaminations (mycotoxins produced by molds), are generated from natural food components upon processing (e.g. heterocyclic...
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Selected organophosphorus compounds with biological activity. Applications in medicine
PublikacjaThe purpose of this article is to provide an overview of the latest applications of organophosphorus compounds (OPs) that exhibit biological activity. A large family of OPs have become popular in recent years. The practical application of OPs in modern medicine has been attributed to their unique properties. In this article, the methods used to select these compounds will be emphasized. This paper will first outline the findings...
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Bis(di-n-propylamine-κN)bis(tri-tert -butoxysilanethiolato-κS)chromium(II)
PublikacjaAtom chromu w tytułowym kompleksie jest czterokrotnie koordynowany: przez dwa atomy siarki grup tri-tert-butoksysilanotiolanowych oraz dwa atomy azotu z dwóch cząsteczek di-n-propyloaminy. Atom Cr leży w centrum inwersji w pozycji Wyckoffa a (1/2, 1/2, 1/2).
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The application of membrane extraction in the separation of zinc and cadmium ions
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Occurrence and Exposure to Lead and Cadmium and Their Environmental Influence on Eyesight
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Changes of emissions and atmospheric deposition of mercury, lead and cadmium
PublikacjaPrzedstawiono informacje o zmianach emisji rtęci, ołowiu i kadmu w przeszłości, jak również przedyskutowano poziom aktualnych emisji tych zanieczyszczeń oraz ich scenariusze zmian w przyszłości. Przeanalizowano wpływ różnych parametrów na zmiany emisji w tym stopień implementacji różnych strategii kontroli emisji w Europie. Scenariusze zmian emisji w przyszłości oparte są na scenariuszach rozwoju gospodarczego w poszczególnych...
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Trans-Dichloridobis(triisopropylphosphine-kP)palladium(II)
PublikacjaThe title compound, [PdCl2(C9H21P)2], is a centrosymmetric mononuclear palladium(II) complex. The PdII atom, which lies on an inversion center, is in a square-planar geometry.
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Rattling-enhanced superconductivity in MV2Al20 (M = Sc, Lu, Y) intermetallic cage compounds
PublikacjaPolycrystalline samples of four intermetallic compounds: MV2Al20 (M=Sc, Y, La, and Lu) were synthesized using an arc-melting technique. The crystal structures were analyzed by means of powder x-ray diffraction and Rietveld analysis, and the physical properties were studied by means of heat capacity, electrical resistivity, and magnetic susceptibility measurements down to 0.4 K. For ScV2Al20, LuV2Al20, and YV2Al20, superconductivity...
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Novel tetrahedral cobalt(II) silanethiolates: structures and magnetism
PublikacjaThree heteroleptic complexes of Co(II) tri-tert-butoxysilanethiolates have been synthesized with piperidine [Co{SSi(OtBu)3}2(ppd)2] 1, piperazine [Co{SSi(OtBu)3}2(NH3)]2(μ-ppz)·2CH3CN 2, and N-ethylimidazole [Co{SSi(OtBu)3}2(etim)2] 3. The complexes have been characterized by a single-crystal X-ray, revealing their tetrahedral geometry on Co(II) coordinated by two nitrogen and two sulfur atoms. Complexes 1 and 3 are mononuclear,...
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Spectroscopic and cytotoxic characteristics of (p-cymene)Ru(II) complexes with bidentate coumarins and density functional theory comparison with selected Pd(II) complexes
PublikacjaThis paper presents the synthesis of two new (p-cymene)-ruthenium(II) complexes with the bidentate coumarin ligands. Both complexes were characterized by FTIR spectroscopy, 1H NMR, 13C NMR, MS, elemental analysis and DFT calculations. The X-ray structure of complex 3a was also solved. The cytotoxic properties of both complexes were examined on human leukemia NALM-6 and HL-60 cells and melanoma WM-115 cells. The complexes possess...
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Analytical procedures for the determination of fuel combustion products, anti-corrosive compounds, and de-icing compounds in airport runoff water samples
PublikacjaThe purpose of this study is to propose and evaluate new procedures for determination of fuel combustion products, anti-corrosive and de-icing compounds in runoff water samples collected from the airports located in different regions and characterized by different levels of the activity expressed by the number of flights and the number of passengers (per year). The most difficult step in the analytical procedure used for the determination...
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A convenient and efficient alfa-sulfenylation of carbonyl compounds
PublikacjaA method for alfa-sulfenylation of carbonyl compounds by a 5,5-dimethyl-2-thioxo-1,3,2-dioxaphosphorinane-2-disulfanyl derivatives has been developed. Readily available reagents, mild reaction conditions, and excellent yields with high selectivity makes this method quite simple, convenient and practical.
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Lower rim substituted tert-butylcalix[4]arenes. Part 10. New Pb(II)-selective electrodes based on tetrasubstituted calix[4]arenes amides
PublikacjaOpracowano elektrody selektywne na jony Pb(II) oparte na lipofilowych tetrapodstawionych amidowych pochodnych kaliks[4] arenu. Charakterystyki elektrod mają nachylenie nernstowskie w szerokim zakresie stężeń 10 (-1.3) do 10 (-7.2).