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Search results for: synthesis of imidazotriazinones
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Paramagnetism of cobalt-doped ZnO nanoparticles obtained by microwave solvothermal synthesis
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Size control mechanism of ZnO nanoparticles obtained in microwave solvothermal synthesis
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Biodegradable macromolecular conjugates of citropin: Synthesis, characterization and in vitro efficiency study
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Star Polymers vs. Dendrimers: Studies of the Synthesis Based on Computer Simulations
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From Hollow to Solid Carbon Spheres: Time-Dependent Facile Synthesis
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Magnetic Silica Nanotubes: Synthesis, Drug Release, and Feasibility for Magnetic Hyperthermia
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Synthesis of Polylysine/Silica Hybrids through Branched-Polylysine-Mediated Biosilicification
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Template method synthesis of mesoporous carbon spheres and its applications as supercapacitors
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Recent developments in the synthesis and applications of graphene-family materials functionalized with cyclodextrins
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Synthesis and Evaluation of Biological Activity of Antimicrobial – Pro-Proliferative Peptide Conjugates
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Synthesis of antimicrobial silver nanoparticles through a photomediated reaction in an aqueous environment
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Synthesis, ellipsometry and non-linear optical features of substituted 1,3,5-triphenylpyrazolines
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From dolomite waste to katoite-based binder: Synthesis, performance and characterization
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Analysis of continuous-to-discrete transformation effect on a synthesis filter bank project
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Optoelectronic monitoring of plasma discharge optimized for thin diamond film synthesis
PublicationPraca dotyczy optoelektronicznego monitoringu wyładowań jarzeniowych podczas syntezy diamentu cienkowarstwowego. Analizę składu plazmy wykonano za pomoca optycznej spektroskopii emisyjnej. Badania mają na celu zdalne określenie składu plazmy oraz jego wpływu na systezę warstw diamentopodobnych.
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Pitch shifter with complex instantaneous frequency rescaling and direct digital synthesis
PublicationW artykule zaprezentowano nowy przesuwnik wysokości dźwięku ze skalowaniem częstotliwości chwilowej i z syntezą bezpośrednią. Jest on przeznaczony do komponowania melodii np. w telefonie komórkowym. Implementacja przesuwnika jest oparta na twierdzeniu Bedrosiana, zastosowanego do zespolonego odpowiednika hilbertowskiego przetwarzanego sygnału rzeczywistego. Filtr Hilberta pełni tu też dodatkową rolę. Jest nią filtracja antyaliasingowa....
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Noise modeling of static CMOS gates for low-noise circuit synthesis
PublicationW artykule przedstawiono efektywną metodę modelowania widma szumu napięcia zasilającego generowanego przez statyczne bramki cyfrowe CMOS. Metoda modelowania uwzględnia krótkie impulsy prądowe powstające w czasie przełączania bramek i pozwala oszacować górne limity widma szumu napięcia zasilającego co umożliwia niskoszumową syntezę układów cyfrowych.
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Synthesis of conjugates of Combretastatin A-4 with tuftsin derivatives as potential anticancer agents
PublicationZaprezentowano syntezę nowych koniugatów Combretastatyny A-4 z pochodnymi tuftsyny i retro-tuftsyny, jako potencjalnych związków przeciwnowotworowych.
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Novel catalysts for low temperature synthesis of single wall carbon nanotubes
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Bulk synthesis and characteristic properties of boron nitride nanostructures: nanocapsules and nanotubes
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Metal Oxides and Low Temperature SWCNT Synthesis via Laser Evaporation
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Synthesis and electronic properties of B-doped single wall carbon nanotubes
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The activity of fused-iron catalyst doped with lithium oxide for ammonia synthesis
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Synthesis and electrochemical characterization of poly(3,4-ethylenedioxythiophene) modified by iron hexacyanocobaltate
PublicationPraca dotyczy sposobu syntezy oraz elektrochemicznej charakterystyki materiału kompozytowego złożonego z poli(3,4-etylenodioksytiofenu) i heksacyjanokobaltanu(III) żelaza(II). Wybrany materiał badany był przy użyciu spektroskopii impedancyjnej, chronopotencjometrii oraz woltamperometrii cyklicznej w kontakcie z elektrolitem wodnym (KCl) oraz aprotycznym (LiPF6 w mieszaninie węglanu etylenu i węglanu propylenu). Materiał charakteryzuje...
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On the synthesis of coupled-lossy resonator filters with unloaded quality factor control
PublicationA technique for fast synthesis of coupling matrix low-pass prototypes of generalized Chebyshev bandpass filters with lossy resonators is presented in this paper. The coupling matrix is found by solving a nonlinear least squares problem based on zeros and poles of filter's transfer functions. Additional constraints are introduced that allow one to control the level of unloaded quality factor of resonators.
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The Chemistry of Mycophenolic Acid-Synthesis and Modifictions Towards Desired Biological Activity
PublicationDokonano przeglądu literatury chemicznej na temat metod syntezy kwasu mykofenolowego oraz jego pochodnych, a także zależności pomiędzy ich strukturą i aktywnością biologiczną.
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Synthesis, characterization, and electrochemical testing of carbon nanotubes derivatized with azobenzene and anthraquinone.
PublicationWielościenne i jednościenne nanorurki węglowe modyfikowano na ścianach bocznych związkami elektrochemicznie aktywnymi, takimi jak azobenzen i antrachinon. Funkcjonalizowane nanorurki badano technikami spektroskopowymi i elektrochemicznymi oraz wykorzystując mikroskopię elektronową. Wyniki tych badań potwierdziły chemiczną modyfikację.
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Synthesis of conjugates of amino-combretastatin with tuftsin derivatives as potential anticancer agents
PublicationOpisano syntezę nowych koniugatów 3'-N-(tuftsyno lub retro-tuftsyno)-amino-kombretastatyny jako potencjalnych związków przeciw-nowotworowych. Do syntezy amino-kombretastatyny (amino-CA-4) wykorzystano reakację Wittiga a koniugatów metodę DPPA. Mamy nadzieję, że połączenie pochodnych tuftsyny z amino-CA-4 wpłynie na polepszenie właściwości terapeutycznych CA-4.
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Synthesis of linear tuftsin analogues modified at the epsilon-amino group of lysine
PublicationZsyntetyzowano na fazie stałej nowe analogi tuftsyny i retro-tuftsyny zawierające wiązanie isopeptydowe na epsilon-aminowej grupie lizyny jako potencjalne immunostymulatory. Do syntezy wykorzystano standardową procedurę Fmoc. Po zdjęciu osłon kwasem TFA końcowe związki były oczyszczane, liofilizowane i charakteryzowane: MS, HPLC i NMR.
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Fast multiplexer cad using surrogate models for channel filters synthesis
Publicationartykuł przedstawia metodę szybkiego projektowania multiplekserów mikrofalowych wykorzystującą dokładne modele zastępcze na etapie projektowania kanałów. przedstawiony został przykład trój-kanałowego multipleksera z filtrami dwurodzajowymi.
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Combretastatin A-4 (CA-4) and its analogues. Synthesis and biological activity
PublicationSpośród wielu związków przeciwnowotworowych otrzymanych w ostatnich dwóch dekadach, na szczególną uwagę zasługują te, które powodują reorganizację mikrotubul. Jedną z takich substancji jest opisana w artykule kombretastatyna A-4 (CA-4), związek który indukuje apoptozęproliferujących komórek śródbłonka naczyń guza nowotworowego. Hamuje on polimeryzację tubuliny, prowadząc do rozpadu mikrotubul. CA-4 wyizolowana została z kory wierzby...
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Synthesis and conformational analysis of salivary proline-rich peptide P-B
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Studies on the application of the Passerini reaction and enzymatic procedures to the synthesis of tripeptide mimetics
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CARBOCHAIN POLYMER-GLUCOSE HYBRIDS: SYNTHESIS, THERMAL/MECHANICAL PROPERTIES AND BIODEGRADABILITY
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Synthesis and characterization of resorcinol–formaldehyde resin chars doped by zinc oxide
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Nanoparticle coatings for stir bar sorptive extraction, synthesis, characterization and application
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Imprinted polymer particles for iron uptake: Synthesis, characterization and analytical applications
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Synthesis and Biological Activity of Strongly Fluorescent Tricyclic Analogues of Acyclovir and Ganciclovir
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Synthesis and singlet oxygen generation of pyrazinoporphyrazines containing dendrimeric aryl substituents
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Azomacrocyclic derivatives of imidazole: synthesis, structure, and metal ion complexation properties
PublicationNew azocrown ethers comprising imidazoles in the macrocycle have been synthesized. Imidazole, 2-methyl-, 4-methyl-, and 4-phenylimidazole were incorporated to form macrocyclic units by coupling with the appropriate bis-diazonium salts. The syntheseswere performed under high dilution conditions. The X-ray structure of a water adduct of the 21-membered crown ether derivative of 4-methylimidazole 8 has been solved. Metal...
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Synthesis and comprehensive structural and physicochemical characterization of dutasteride hydrochloride hydrate solvates
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Gelatin nanofibers: Recent insights in synthesis, bio-medical applications and limitations
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One-Step Synthesis of b-Lactams with Retro-Amide Side Chain
PublicationAbstract: A one pot synthesis for preparation of 1,4-disubstituted-2-oxo-azetidine-3-carboxylic acid amides was developed. 5-(α-N-substituted-amino-α'-hydroxy)methylene Meldrum's acids act as a source of ketenes that react with aldimines in boiling toluene to give b-lactams with retro-amid side chain.
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Synthesis, microstructure and electrical properties of nanocrystalline calcium doped lanthanum orthoniobate
PublicationThe single phase lanthanum orthoniobate with tetragonal structure has been synthesized by the means of mechanosynthesis method. The studies have shown the crystal structure of La0.98Ca0.02NbO4 depends on the synthesis stage. The samples were predominantly in the tetragonal phase with a trace amount of the monoclinic phase. The SEM studies of morphology and microstructure have shown nanocrystallinity of the materials. The Raman...
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Efficient synthesis and antifungal investigation of nucleosides’ quaternary ammonium salt derivatives
PublicationQuaternary ammonium salts are a group of compounds with diverse biological properties, the most important of which are their antiviral, antibacterial, and antifungal activities. The quaternization reactions of 5'-O-tosyl derivatives of uridine and thymidine with triethylamine, trimethylamine, 4-(N ,N -dimethylamino)pyridine, 2-methylpyridine, and pyridine are described in this article. Two of the synthesized compounds are exceptional...
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Synthesis and Cholinesterase Inhibitory Activity of N-Phosphorylated /N-Tiophosphorylated Tacrine
PublicationNovel phosphorus and thiophosphorus tacrine derivatives were designed, synthesized and their biological activity and molecular modeling was investigated as a new potential anti-Alzheimer's disease (AD) agents. All new synthesized compound exhibited lower toxicity against neuroblastoma cell line (SH-SY5Y) in comparison with tacrine. Two analogues in the series, 7 and 9, demonstrated lack of cytotoxicity against hepatocellular cells...
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Synthesis and structural characterization of new cyclic siloxane with functionalized organic substituents
PublicationOcta(2-pyridyloxy)cyclotetrasiloxane was isolated as the product of the reaction between silicon disulfide and 2-hydroxypyridine. The new compound has been characterised by single crystal X-ray analysis, revealing a planar eight-membered ring with functionalized organic substituents on the silicon atoms.
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Synthesis and antimicrobial activity of amino acid and peptide derivatives of mycophenolic acid
PublicationThe series of 16 novel amino acid and peptide mycophenolic acid (MPA) derivatives was obtained as potential antibacterial agents. Coupling of MPA with respective amines was optimized with condensing reagents such as EDCI/DMAP and T3P/TEA. Amino acid analogs were received both as methyl esters and also with the free carboxylic group. The biological activity of the products was tested on five references bacterial strains: Klebsiella...
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Synthesis and antiproliferative activity of new mycophenolic acid conjugates with adenosine derivatives
PublicationNew conjugates of mycophenolic acid (MPA) and adenosine derivatives were synthesized and assessed as potential immunosuppressants on Jurkat cell line and peripheral blood mononuclear cells (PBMC) from healthy donors. As compared to MPA, all compounds were found to be more active against Jurkat cell line. The antiproliferative activities were compared with MPA and adenosine, in both 2′,3′-O-isopropylidene protected and free hydroxyl...
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Implementation of multi-operand addition in FPGA using high-level synthesis
PublicationThe paper presents the results of high-level synthesis (HLS) of multi-operand adders in FPGA using the Vivado Xilinx environment. The aim was to estimate the hardware amount and latency of adders described in C-code. The main task of the presented experiments was to compare the implementations of the carry-save adder (CSA) type multi-operand adders obtained as the effect of the HLS synthesis and those based on the basic component...