Filters
total: 3550
displaying 1000 best results Help
Search results for: speech%20synthesis
-
Synthesis and antimicrobial activity of 6-sulfo-6-deoxy-D-glucosamine and its derivatives
Publication6-Sulfo-6-deoxy-D-glucosamine (GlcN6S), 6-sulfo-6-deoxy-D-glucosaminitol (ADGS) and their N-acetyl and methyl ester derivatives have been synthesized and tested as inhibitors of enzymes catalyzing reactions of the UDP-GlcNAc pathway in bacteria and yeasts. GlcN6S and ADGS at micromolar concentrations inhibited glucosamine-6-phosphate (GlcN6P) synthase of microbial origin. The former was also inhibitory towards fungal GlcN6P N-acetyl...
-
Solvent-Free Synthesis of Phosphonic Graphene Derivative and Its Application in Mercury Ions Adsorption
PublicationFunctionalized graphene was efficiently prepared through ball-milling of graphite in the presence of dry ice. In this way, oxygen functional groups were introduced into material. The material was further chemically functionalized to produce graphene derivative with phosphonic groups. The obtained materials were characterized by spectroscopic and microscopic methods, along with thermogravimetric analysis. The newly developed material...
-
Micellar Route of the Synthesis of Alkyl Xylosides: An Unexpected Effect of Amphiphilic Imidazolium Ionic Liquids
PublicationThis manuscript presents results from the investigation on the synthesis of alkyl xylosides by the novel, very efficient and promising protocol of the Fischer synthesis from unprotected xylose and aliphatic alcohol. The use of 1-alkyl-3-methylimidazolium hydrogen sulfate ionic liquids as the catalysts with dual functionality (surfactant + acid catalyst) and micellar reaction system are the main novelty of described method. It has...
-
Mechanism of Reduced Sintering Temperature of Al2O3–ZrO2 Nanocomposites Obtained by Microwave Hydrothermal Synthesis
PublicationA novel method to obtain Al2O3–ZrO2 nanocomposites is presented. It consists of the co-precipitation step of boehmite (AlO(OH)) and ZrO2, followed by microwave hydrothermal treatment at 270 ◦ C and 60 MPa, and by calcination at 600 ◦ C. Using this method, we obtained two nanocomposites: Al2O3–20 wt % ZrO2 and Al2O3–40 wt % ZrO2. Nanocomposites were characterized by Fourier transformed infrared spectroscopy, Raman spectroscopy,...
-
Synthesis of conjugates of muramyl dipeptide and nor-muramyl dipeptide derivatives with adenosine as potential immunosuppressant
PublicationZaprezentowano syntezę koniugatów adenozyny z pochodnymi muramylo- i nor-muramylodipeptydów zawierających w części peptydowej D-aminokwasy (D-Ala, D-Val, D-Ser, D-Pro, D-2-ABA). Jako substrat zastosowano rybozyd 6-chloropuryny, który łączono poprzez 1,2-diaminoetan z odpowiednimi pochodnymi MDP lub nor-MDP w obecności EDCI i HOBt. Struktury otrzymanych związków zostały potwierdzone widmami 1H i 13C NMR (500 MHz), widmami MS oraz...
-
Synthesis, coordination properties and biological activity of vanadium complexes with hydrazone Schiff base ligands
Publication -
Simultaneous siRNA-mediated silencing of pairs of genes coding for enzymes involved in glycosaminoglycan synthesis.
Publication -
Polymeric bisphosphonate derivative of ciprofloxacin – synthesis, structural analysis and antibacterial activity of the prospective conjugate
Publication -
Synthesis, Growth Mechanism, and Electrochemical Properties of Hollow Mesoporous Carbon Spheres with Controlled Diameter
Publication -
Synthesis, characterization and growth mechanism of mesoporous hollow carbon nanospheres by catalytic carbonization of polystyrene
Publication -
Selective Synthesis of Magnetite Nanospheres with Controllable Morphologies on CNTs and Application to Lithium‐Ion Batteries
Publication -
High-Entropy Perovskites as Multifunctional Metal Oxide Semiconductors: Synthesis and Characterization of (Gd0.2Nd0.2La0.2Sm0.2Y0.2)CoO3
Publication -
Synthesis of New Hydrazone Derivatives and Evaluation of their Efficacy as Proliferation Inhibitors in Human Cancer Cells
Publication -
Synthesis and photo-conversion of androsta- and pregna-5,7-dienes to vitamin D3-like derivatives
Publication -
Synthesis of Fatty Acid Esters of Selected Higher Polyols Over Homogeneous Metallic Catalysts
Publication -
On the formation process of silicon carbide nanophases via hydrogenated thermally induced templated synthesis
Publication -
Novel Catalysts, Room Temperature, and the Importance of Oxygen for the Synthesis of Single-Walled Carbon Nanotubes
Publication -
Synthesis and characterization of metal polycarboxylates constructed from lanthanides(iii) and 1,2,4,5-benzenetetracarboxylic acid
Publication -
Synthesis, characterization and photophysical properties of novel 5,7-disubstituted-1,4-diazepine-2,3-dicarbonitriles
Publication -
Synthesis of sulfanyl porphyrazines with bulky peripheral substituents – Evaluation of their photochemical properties and biological activity
Publication -
Magnesium porphyrazine with peripheral methyl (3,5-dibromophenylmethyl)amino groups – synthesis and optical properties
Publication -
Synthesis and photochemical characteristics of novel tribenzoporphyrazines possessing peripherally annulated tetrahydrodiazepine and diazepine rings
Publication -
Stimulated by cyclodextrins high yield synthesis of azocrown analogues comprising pyrrole or imidazole residues
PublicationThe influence of cyclodextrins (CDs) on the formation of azocrown ethers comprising pyrrole, imidazole and substituted imidazole has been studied. Pyrrole, imidazole, 2-methyl-, 4-methyl- and 4-phenylimidazole were coupled with bisdiazonium salts derived from bis-1,5-(2-aminophenoxy)-3-oxapentane or bis-1,8-(2-aminophenoxy)-3,6-dioxaoctane to form macrocyclic compounds with two azo units. The syntheses were performed under standard...
-
Studies on Aryl-Substituted Phenylalanines: Synthesis, Activity, and Different Binding Modes at AMPA Receptors
Publication -
Lyotropic liquid crystal based on zinc oxide nanoparticles obtained by microwave solvothermal synthesis
Publication -
Synthesis of Bis(ethylenedithio)dithiadiazafulvalenes (BEDT-DTDAF) and Generation of Charge Transfer Complexes with Tetracyanoquinodimetane
PublicationW artykule opisana została synteza Bis(etylenoditio)ditiadiazafulwalenów (BEDT-DTDAF) wykorzystująca jako kluczowe związki przejściowe 4,5-(etylenoditio)tiazol oraz sole 3-aliklo-4,5-(etylenoditio)tiazoliowe oraz generowanie przewodzących kompleksów z przeniesieniem ładunku usyskanych z Bis(etylenoditio)ditiadiazafulwalenów oraz tetracyjanochinodimetanu.
-
Stimulated by cyclodextrins high yield synthesis of azocrown analogues comprising pyrrole or imidazole residues
PublicationBadano wpływ cyklodekstryn na reakcję syntezy aza-eterów zawierających w strukturze pirol lub imidazol. Stosowano alfa-, beta- i gamma-cyklodekstryny. Uzyskane wyniki analizowano pod kątem sposobu umieszczenia cząsteczki azolu we wnęce cyklodekstryny.
-
Synthesis of new conjugates of MDP and nor-MDP with retro-tuftsin derivatives as potential immunomodulators
PublicationZsyntetyzowano nowe analogi muramylodipeptydu (MDP) i nor-muramylo-dipeptydu (nor-MDP) z pochodnymi retro-tuftsyny jako potencjalne immunomodulatory. Przedstawiono także syntezę odpowiednich pochodnych retro-tuftsyny. Do syntezy wykorzystano metodę mieszanych bezwodników z chloromrówczanem izobutylu i N-metylomorfoliną w bezwodnym DMF.
-
Synthesis of Polycyclic δ-Lactams with Bridged Benzomorphan Skeleton: Selectivity and Diversity Driven by Substituents
Publication -
Synthesis of sulfanylidene-diazaspirocycloalkanones in a three-component Mannich-type reaction catalyzed with lactic acid
Publication -
Synthesis of 2-Propanoyl-5-Norbornene in Pyridinium Ionic Liquids Catalyzed by Yttrium Salts
Publication -
Synthesis, Pharmacological Evaluation, and Computational Studies of Cyclic Opioid Peptidomimetics Containing β3-Lysine
Publication -
Synthesis, structural, electronic and linear electro-optical features of new quaternary Ag2Ga2SiS6 compound
Publication -
Green Synthesis of ZnO nanoparticles using Nigella sativa seed extract for antibacterial activities
Publication -
Cold Plasma Synthesis and Testing of NiOX-Based Thin-Film Catalysts for CO2 Methanation
Publication -
Synthesis and Characterization of Size- and Charge-Tunable Silver Nanoparticles for Selective Anticancer and Antibacterial Treatment
Publication -
Synthesis, structure and application of a new class of Tr-podands derived in phase-transfer catalysis
Publication -
Natural Environments for Nanoparticles Synthesis of Metal, Metal Oxides, Core–Shell and Bimetallic Systems
Publication -
Synthesis of carbon nanotubes via chemical vapor deposition by using rareearth metals as catalysts
Publication -
Facile synthesis N-doped hollow carbon spheres from spherical solid silica
Publication -
Low-temperature synthesis of zeolite from perlite waste — Part II: characteristics of the products
Publication -
Catalyst-free synthesis, morphology evaluation and photocatalytic properties of pristine and calcinated titanate nanorods
Publication -
Systematic study on synthesis and purification of double-walled carbon nanotubes synthesized via CVD
Publication -
Synthesis of analogues of anthraquinones linked to tuftsin or retro-tuftsin residues as potential topoisomerase inhibitors
PublicationZsyntetyzowano 10 nowych analogów antrachinonów z pochodnymi tuftsyny i retro-tuftsyny jako potencjalne inhibitory topoizomerazy. Substratem wyjściowym były zsyntetyzowane 1,4-, 1,5- i 1,8-bis(tosyloksy)-9,10-antrachinony oraz odpowiednio chronione pochodne tuftsyny i retro-tuftsyny, które otrzymano metodą mieszanych bezwodników z zastosowaniem chloromrówczanu izobutylu i NMM. Reakcje prowadzone były w acetonitrylu pod azotem w...
-
Synthesis, single crystal growth and properties of Sr 5 Pb 3 ZnO 12
Publication -
A new pitch shifter based on complex instantaneous frequency rescaling and direct digital synthesis
PublicationZaproponowano nową metodę zmiany wysokości dźwięku za pośrednictwem skalowania zespolonej częstotliwości chwilowej i na podstawie cyfrowej syntezy bezpośredniej. Zaprezentowano schematy blokowe opracowanych algorytmów. Pracę zilustrowano przykładem syntezy sygnału wywoławczego (''dzwonka'' telefonicznego), gdzie dźwięki poszczególnych nut generowanej melodii uzyskano na podstawie naturalnego sygnału - pojedynczego świergotu o widmie...
-
Synthesis and structure of Dicyclohexylammonium Tri-tert-pentoxysilanethiolate and 5-aminopentylammonium Tri-tert-pentoxysilanethiolate
PublicationTri-tert-pentoksysilanotiol reaguje z dicykloheksyloaminą i 1,5-diaminopentanem dając odpowiednie sole amoniowe. Sole te scharakteryzowano poprzez analizę elementarną, widma IR i NMR oraz metodą rentgenowskiej analizy strukturalnej. Są to pierwsze pochodne tri-tert-pentoksysilanotiolu, dla których wyznaczono strukturę krystaliczną.
-
Diastereoselective formation of glucoluril dimers: isomerization mechanismand implications for cucurbit[n]uril synthesis
PublicationZaprezentowano syntezę pochodnych glikolurylu tworzących ściśle sprecyzowane dimeryczne struktury w roztworze wodnym. Opisano diastereoselektywną syntezę pochodnych o strukturze amfifilowej. Przedstawiono mechanizm reakcji oraz struktury krystalograficzne wybranych związków.
-
Size-Controlled Synthesis of Pt Particles on TiO2 Surface: Physicochemical Characteristic and Photocatalytic Activity
PublicationDifferent TiO2 photocatalysts, i.e., commercial samples (ST‐01 and P25 with minority of rutile phase), nanotubes, well‐crystallized faceted particles of decahedral shape and mesoporous spheres, were used as supports for deposition of Pt nanoparticles (NPs). Size‐controlled Pt NPs embedded in TiO2 were successfully prepared by microemulsion and wet‐impregnation methods. Obtained photocatalysts were characterized using XRD, TEM,...
-
Tailoring Physicochemical Properties of V2O5 Nanostructures: Influence of Solvent Type in Sol-Gel Synthesis
PublicationThe influence of different solvents, including aqueous and nonaqueous types, on the physicochemical properties of V2O5 nanostructures was thoroughly investigated. Various characterization techniques, such as XRD, XPS, FTIR, Raman spectroscopy, UV-vis DRS, SEM, TEM, and BET, were employed to analyze the obtained materials. Additionally, the adsorption properties of the synthesized V2O5 nanostructures for methylene blue were examined,...