Filtry
wszystkich: 1633
wybranych: 1403
-
Katalog
- Publikacje 1403 wyników po odfiltrowaniu
- Czasopisma 13 wyników po odfiltrowaniu
- Konferencje 6 wyników po odfiltrowaniu
- Osoby 29 wyników po odfiltrowaniu
- Projekty 2 wyników po odfiltrowaniu
- Zespoły Badawcze 1 wyników po odfiltrowaniu
- Kursy Online 7 wyników po odfiltrowaniu
- Wydarzenia 1 wyników po odfiltrowaniu
- Dane Badawcze 171 wyników po odfiltrowaniu
Filtry wybranego katalogu
wyświetlamy 1000 najlepszych wyników Pomoc
Wyniki wyszukiwania dla: SYNTHESIS
-
Evaluation of a Novel Approach to Virtual Bass Synthesis Strategy
PublikacjaThe aim of this paper is to present a novel approach to the Virtual Bass Synthesis (VBS) strategy applied to portable computers. The developed algorithms involve intelligent, rule-based settings of bass synthesis parameters with regard to music genre of an audio excerpt and the type of a portable device in use. The Smart VBS algorithm performs the synthesis based on a nonlinear device (NLD) with artificial controlling synthesis...
-
Morphology control through the synthesis of metal-organic frameworks
PublikacjaDesignable morphology and predictable properties are the most challenging goals in material engineering. Features such as shape, size, porosity, agglomeration ratio significantly affect the final properties of metal- organic frameworks (MOFs) and can be regulated throughout synthesis parameters but require a deep under- standing of the mechanisms of MOFs formation. Herein, we systematically summarize the effects of the indi- vidual...
-
Amino Acid Based Antimicrobial Agents – Synthesis and Properties
PublikacjaStructures of several dozen of known antibacterial, antifungal or antiprotozoal agents are based on the amino acid scaffold. In most of them, the amino acid skeleton is of a crucial importance for their antimicrobial activity, since very often they are structural analogs of amino acid intermediates of different microbial biosynthetic pathways. Particularly, some aminophosphonate or aminoboronate analogs of protein amino acids are...
-
SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF NIOBIUM-DOPED HYDROXYAPATITE CERAMICS
PublikacjaHydroxyapatite (HAp) ceramic materials are considered as one of the most promising implant materials in bone surgery and in dentistry. They exhibit unique biocompatibility, bioactivity, and osteoconductivity, which are the most desirable biomaterial features. However, HAp itself is brittle, has low strength, high degree of crystallinity and low solubility at physiological pH. Doping synthetic HAp with metal ions plays an important...
-
Convenient and efficient synthesis of functionalized unsymmetrical alkynyl sulfides
PublikacjaWe developed a simple and efficient method for the synthesis of functionalized unsymmetrical alkynyl sulfides under mild conditions in good yields. The designed method is based on the reaction of 5,5-dimethyl-2-thioxo-1,3,2-dioxaphosphorinan-2-disulfanyl derivatives with lithium acetylides. The developed method allows the preparation of unsymmetrical alkynyl sulfides bearing additional hydroxyl, carboxyl, or amino functionalities.
-
Thin CVD diamond films - synthesis, properties, applications
PublikacjaThe basic model of diamond films growth, in the low pressure synthesis, deposition from the CVD gas phase, is the mixture of hydrocarbon gas in presence with activated hydrogen and its nucleation on the substrate as a result of pyrolysis reaction. It allows to cross the great energetic barrier between graphite and diamond. High pressure and temperature are replaced by change of electronic structure of atoms into gas precursors...
-
An efficient and convenient synthesis of unsymmetrical disulfides from thioacetates
PublikacjaWe have developed convenient methods for the synthesis of functionalized unsymmetrical dialkyl disulfides under mild conditions in very good yields. The designed method is based on the reaction of (5,5-dimethyl-2-thioxo-1,3,2-dioxaphosphorinan-2-yl)-disulfanyl derivatives 1 with functionalized alkyl thiolate anions, generated in situ from thioacetates2and sodium methoxide or butylamine. The developed method allows the preparation...
-
Complexes of silanethiolate ligands: Synthesis, structure, properties and application
PublikacjaThe purposeful syntheses of silanethiolate complexes started approximately in the mid-eighties of the 20th century but no summary of the synthetic efforts has been reported till now. The synthetic methods and the resulting complexes have some common features, which are emphasized throughout the review. Thereby specific difficulties during synthesis are outlined and the structures, properties and possible applications of the resulting...
-
Synthesis and properties of new 'N,'N-phenyltetrazole podand
PublikacjaThe synthesis of a new chromogenic N,N-phenyltetrazole receptor is reported here. The cationbinding properties of this receptor in solution were investigated by naked-eye colour change, electrochemical methods and UV-Vis spectroscopy in various solvents (CH3CN, dimethylsulphoxide (DMSO), DMSO/H2O, CH3CN/H2O and CH3CN/MeOH). In addition, the receptor was used as a sensing material in ion-selective membrane electrodes. The selectivity...
-
A Review on Deactivation and Regeneration of Catalysts for Dimethyl Ether Synthesis
Publikacjahe deactivation of catalysts and their regeneration are two very important challenges that need to be addressed for many industrial processes. The most quoted reasons for the deterioration of dimethyl ether synthesis (DME) concern the sintering and the hydrothermal leaching of copper particles, their migration to acid sites, the partial formation of copper and zinc hydroxycarbonates, the formation of carbon deposits, and surface...
-
Nanoparticles: Synthesis, characteristics, and applications in analytical and other sciences
PublikacjaNanoparticles (NPs) are widely employed in different research areas, ranging from analytical chemistry and environmental science to medicine, the agriculture and pharmaceutical industry. This is mainly due to the unique characteristics of NPs and the novelty they introduce in such applications. In analytical chemistry, the role of NPs can differ depending on the nature of the steps involved in analytical process. NPs are probably...
-
Two complementary approaches for the synthesis and isolation of stable phosphanylphosphaalkenes
PublikacjaPhospha-Wittig (phosphanylphosphinidene titanium(IV) complex) and phospha-Peterson (lithiated diphosphane) reactions were used to obtain phosphanylphosphaalkenes with the general formula XYC=P-PtBu2 (X = alkyl, aryl group or H; Y = alkyl or aryl group). Therefore, two series of reactions with different ketones and aldehydes were performed. An examination revealed that the two methods are complementary. For smaller carbonyl compounds,...
-
Microwave-assisted synthesis of zinc derivatives of potato starch
PublikacjaZincatated potato starch was prepared in a solid-state, microwave-assisted reaction using generated in situ sodium tetrahydroxozincate [Na2Zn(OH)4]. For comparison, zincatation of starch was also carriedout on convectional heating. Depending on the irradiation conditions, the products of either mono- or crosslinking esterification were formed. Higher power applied at shorter exposition offered products ofmonoesterification, and...
-
Influence of conditions of synthesis on superconductivity in Nd2-xCexCuO4-y
PublikacjaPróbki Nd1.85Ce0.15CuO4 uzyskano dwoma różnymi metodami syntez. Po procesie redukcji właściwości nadprzewodzące próbek scharakteryzowano za pomocą pomiarów rezystywnych i magnetycznych. W celu przeanalizowania morfologii powierzchni próbek poddano je badaniom mikroskopowym SEM z sondą EDAX.
-
Synthesis of 2,6-diaminopimelic acid (DAP) and its analogues
PublikacjaKwas 2,6-diaminopimelinowy jest ważnym aminokwasem biosyntetyzowanym przez bakterie i wyższe rośliny. Liczne fragmenty peptydoglikanu zawierające reszty kwasu diaminopimelinowego wykazują aktywność przeciwnowotworową i/lub immunostymulacyjną. W artykule opisano sposoby syntezy kwasu 2,6-diaminopimelinowego i jego analogi.
-
Synthesis of bicoumarin thiophosphate derivatives as steroid sulfatase inhibitors
PublikacjaBased on the frameworks of 7-hydroxy-2,3-dihydro-1H-cyclopenta[c]chromen-4-one, 3-hydroxy- 7,8,9,10-tetrahydro-6H-benzo[c]chromen-6-one and 3-hydroxy-8,9,10,11-tetrahydro-7H-cyclohepta[c] chromen-6-one, a series of bicoumarin thiophosphate analogs have been synthesized and biologically evaluated. Additionally, their binding modes have been modeled using docking techniques. The inhibitory properties of the synthesized compounds...
-
Novel Biomass-Based Polymers: Synthesis, Characterization, and Application
PublikacjaA wide range of polymers were prepared from biomass-derivatives, using different polymerization mechanisms. Well-defined, fully hydroxy-functional polyesters based on aliphatic diols were synthesized, using either conventional metal-based catalysts or the organic superbase 1,5,7-triazabicyclododecene (TBD). Unsaturated polyesters were also made, offering additional functionality to these biobased resins. Metal-catalyzed or enzymatic...
-
Acyl Meldrum's acid derivatives: application in organic synthesis
PublikacjaThis review is focused on one of the most important classes of Meldrum's acid derivatives commonly known as acyl Meldrum's acids. The preparation methods of these compounds are considered including the recently proposed and rather rarely used ones. The chemical properties of acyl Meldrum's acids are described in detail, including thermal stability and reactions with various nucleiophiles. The possible mechanisms of these transformations...
-
Solid Phase Synthesis and Biological Activity of Tuftsin Conjugates
PublikacjaNew tuftsin/retro-tuftsin conjugates were designed and synthesized using a classical fluorenylmethoxycarbonyl (Fmoc) solid phase procedure. All the peptide conjugates were divided into three series: 1,4-dihydroxyanthraquinone (type A), 1-nitroacridine (type B), and 4-carboxyacridone (type C) derivatives. In type A conjugates, the N-terminal group of the peptide chain is directly connected to the anthraquinone ring at C1 (Scheme...
-
Action-reaction based synthesis of acoustic wavefield equations
PublikacjaThe analysis of acoustic fields is usually based on the well-known mathematics of second order partial differential equations called wave equations. The author explores the duality and symmetry of linear fluid mechanics and develops two distinct equations of acoustics on the basis of a causal approach to local small-scale phenomena. Wavefields that are solutions of these equations have different composition, the spherical pressure...
-
Synthesis of the inosine 5′-monophosphate dehydrogenase (IMPDH) inhibitors
Publikacja -
Synthesis of irregular motion mechanisms for production machine drives
Publikacja -
Laser-Assisted Synthesis and Oxygen Generation of Nickel Nanoparticles
Publikacja -
HIGH LEVEL SYNTHESIS IN FPGA OF TCS/RNS CONVERTER
PublikacjaThe work presents the design process of the TCS/RNS (two's complement–to– residue) converter in Xilinx FPGA with the use of HLS approach. This new approach allows for the design of dedicated FPGA circuits using high level languages such as C++ language. Such approach replaces, to some extent, much more tedious design with VHDL or Verilog and facilitates the design process. The algorithm realized by the given hardware circuit is...
-
1,3,4-Thiadiazole-based diamides: Synthesis and complexation properties
PublikacjaAromatic diamides, derivative of 2,6-pyridinedicarboxylic acid and isophthalic acid, bearing 1,3,4-thiadiazole residue were prepared with satisfactory yields in conventional procedures and microwave stimulated reactions. X-ray structure of N,N-bis (1,3,4-thiadiazol-2-yl)-2,6-pyridinedicarboxamide (2) DMSO solvate (2DMSO) was described. Selective zinc(II), lanthanum(III), terbium(III) and L-tyrosine recognition was found for N,N-bis(1,3,4-thiadiazol-2-yl)-2,6-pyridinedicarboxamide...
-
Entrepreneurial Failure: A Synthesis and Conceptual Framework of its Effects
Publikacja -
Influence of hydrothermal synthesis parameters on the properties of hydroxyapatite nanoparticles
Publikacja -
Synthesis of Thermally Stable Energetic 1,2,3-Triazole Derivatives
Publikacja -
3D porous graphene-based structures- synthesis and applications
PublikacjaPorous carbon-based materials are of the great industrial and academic interest due to their high surface area, low density, good electrical conductivity, chemical inertness and low cost of fabrication. Up to now, the main approach to obtain porous carbon structures has involved the pyrolysis of carbonaceous natural or synthetic precursors. After the isolation of graphene, the interest in 3D porous graphene-based structures (called...
-
Synthesis of the inosine 5'-monophosphate dehydrogenase (IMPDH) inhibitors
PublikacjaIn this review are summrized newly described IMPDH inhibitors. The article concerns both synthetic pathways and biological activities of the most promising compounds.
-
Application of Reversible Logic in Synthesis of Traffic Control Systems
Publikacja -
Enantioselective Gel Phase Synthesis of Metal–Organic Materials
Publikacja -
Solid phase synthesis of two muramyl pentapeptide derivatives
Publikacja -
Synthesis of Multiwalled Carbon Nanotubes by Catalytic Combustion of Polypropylene
Publikacja -
Synthesis of some optically active terpenoid-derived thioamides
Publikacja -
Heterogeneity of ingot of the fused iron catalyst for ammonia synthesis
Publikacja -
Investigation of manganese-doped iron ammonia synthesis catalysts
Publikacja -
Wustite based iron-cobalt catalyst for ammonia synthesis
Publikacja -
Synthesis and magnetic properties of (Ba,Bi)1.54Rh8O16 hollandite
Publikacja -
Raman scattering measurements in monitoring of polymer synthesis process
Publikacja -
Synthesis and properties of the double perovskites La2NiVO6, La2CoVO6, and La2CoTiO6
Publikacja -
Synthesis of anthraquinone-tuftsin analogues as potential topoisomerase inhibitors
PublikacjaZaprezentowano syntezę nowych analogów antrachinonów z pochodnymi tuftsyny i retro-tuftsyny oraz wstępne badania biologiczne (aktywność cytotoksyczną na wybranych liniach nowotworowych oraz zdolność hamowania topoizomerazy I).
-
Synthesis and characterization of iron-filled multi-walled nanotubes
Publikacja -
Synthesis and Selected Properties of Ester Elastomer Containing Sorbitol
Publikacja -
Synthesis of Novel Polycationic Quaternary Di- and Trispirocyclic Benzenes
PublikacjaTreatment of hexakis(bromomethyl)benzene with a cyclic amine {morpholine, 1-methylpiperazine, 1-(2-hydroxyethyl)piperazine, isonipecotamide, 4-hydroxypiperidine, 4-[3-(4-piperidyl)propyl]-1-piperidineethanol} gave a range of di- and trispirocyclic ammonium salts in satisfactory yields (22-62%). Presumably, the electrostatic and repulsion forces play an important role in their formation. The structure in soln. and the protonation...
-
Methods for the synthesis of xanthine-derived polycyclic fused systems
Publikacja -
Synthesis of S-thioacyl dithiophosphates, efficient and chemoselectivethioacylating agents
PublikacjaŁatwo dostępne ditiofosforany acylu izomeryzują do monotiofosforanów O- iS-tioacylu. Reakcja jest odwracalna, więc ogrzewanie ditiofosforanów acylu prowadzi zazwyczaj do powstania mieszaniny izomerycznych bezwodników, która nie może być wykorzystana do wydajnego tioacylowania. Jednak działaniem kwasu ditiofosforowego na mieszaninę izomerycznych bezwodników można wydajnie otrzymać ditiofosforany tioacylu. Związki te to doskonałe...
-
Synthesis and properties of UV-curable poly(imideurethane) acrylates.
PublikacjaOtrzymano światłoczułe poli(imidouretano) akrylany (PIUA) które użyte zostały do wytwarzania światłoczułych kompozycji z dodatkiem reaktywnych rozcieńczalników i różnych fotoinicjatorów. Uzyskane z nich cienkie warstwy polimerowe ulegały usieciowaniu pod działaniem światłaUV w ciągu 10-30 sek. W badaniach fotolitograficznych uzyskano z ich użyciem ścieżki izolacyjne o rozdzielczości 10 mikrometrów. Usieciowane PIUA scharakteryzowano...
-
Efficient synthesis of orthogonally protected spermidine and norspermidine derivatives
PublikacjaOtrzymano kilka chronionych pochodnych spermidyny i norspermidyny w wyniku reakcji cyjanoetylowania chronionych diamin, ochrony drugorzędowej grupy aminowej oraz redukcji otrzymanego nitrylu za pomocą wodorku litowo-glinowego w temperaturze 0° C.
-
Automatic synthesis of parametric images in dynamic MRI imaging
PublikacjaArtykuł opisuje automatyczne metody czasu dojścia kontrastu (BAT) i tętniczą funkcję wejścia (AIF). Metody te porównano dla klinicznych i symulacyjnych danych.