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Search results for: ACYL MELDRUM'S ACID
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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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The acid strength of the HClO4/n(AlF3) and HClO4/n(SbF5) (n = 1–3) Lewis–Brønsted superacids containing the excess of the Lewis acid component
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Analysis of carboxylic acid metabolites from the tricarboxylic acid cycle in Bacillus subtilis cell extract by capillary electrophoresis using an indirect photometric detection method
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The Relationship between the Structure and Properties of Amino Acid Ionic Liquids
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Application of Peracetic Acid for Biological Foam Elimination in the SBR Bioreactor
PublicationPrzedstawiono wyniki wstępnych badań nad zastosowaniem kwasu nadoctowego (PAA) do likwidacji piany biologicznej, spowodowanej przez bakterię nitkowatą Microthrix parvicella. Wykazano, że okresowe zraszanie powierzchni piany małymi dawkami kwasu nadoctowego (rzędu kilkudziesięciu ml 1% roztworu PAA/na 1 m2 piany o grubości 1 cm) powoduje niemal natychmiastwy zanik piany, wytworzonej na powierzchni osadu czynnego w bioreaktorze...
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Physicochemical and catalytic properties of ployaniline protonated with 12-molybdophosphoric acid
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Photophysics of 7-Hydroxytetrahydroisoquinoline-3-carboxylic Acid and Its Derivatives
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Updates on Metabolism in Lactic Acid Bacteria in Light of “Omic” Technologies
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Phosphatidylcholine with conjugated linoleic acid in fabrication of novel lipid nanocarriers
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Thermal properties of lanthanide(III) complexes with 2-aminoterephthalic ACID
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1,4,7,10-Tetraazacyclododecane incorporating salicyli acid moieties. Synthesis and properties
PublicationPochodne 1,4,7,10-tetraazacyklododekanu są związkami które znalazły szerokie zastosowanie w wielu dziedzinach: medycynie, chemii, farmacji, ochronie środowiska itd. Właściwości fizykochemiczne poszczególnych związków determinowane są przez pierścień makrocykliczny i podstawniki. Kwas salicylowy i salicylamid tworzą kompleksy chelatowe z kationami II grupy jak również z metalami przejściowymi. W reakcji acylowania cyklenu pochodnymi...
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The influence of salt in solutions on hydrochloric acid recovery by membrane distillation
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CHARACTERISATION OF CHITOSAN/HYALURONIC ACID BLEND FILMS MODIFIED BY COLLAGEN
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Chitosan blends containing hyaluronic acid and collagen. Compatibility behaviour
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THE INFLUENCE OF THE TYPE SOLVENT ON THE STRUCTURE OF CHITOSAN BLENDS WITH HYALURONIC ACID
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Raman spectroscopy study on concentrated acid treated carbon nanotubes
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ACID whey concentrated by ultrafiltration a tool for modeling bread properties
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Synthesis of polyglycerol esters of fatty acid with defined hydrophilic properties
PublicationOtrzymane w odrębnej reakcji mieszaniny poligliceroli poddano estryfikacji kwasami tłuszczowymi oktadekanowym i izooktadekanowym, w obecności odpowiednich mydeł sodu powstających in situ. Zaobserwowano wpływ stężenia karboksylanów sodu oraz budowy kwasu tłuszczowego na przebieg estryfikacji mieszaniny polioli. Stwierdzono, że zastosowany sposób prowadzenia reakcji pozwala zsyntetyzować efektywne emulgatory emulsji O/W, o wartościach...
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Polyglycerol esters of lauric acid with defined hydrophile-lipophile properties.
PublicationZsyntetyzowano estrowe pochodne poligliceroli i kwasu laurynowego w obecności laurynianu sodu powstającego in situ. Przeanalizowano wpływ temperatury, stężenia katalizatora oraz czasu reakcji na postęp reakcji polimeryzacji glicerolu, a także wpływ stężenia karboksylanu i czasu reakcji na reakcję estryfikacji uzyskanej mieszaniny polioli kwasem laurynowym. Zauważono, że zastosowana metoda syntezy estrów poligliceroli prowadzi do...
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The electrochemical deposition of nickel from electrolytes containing malonic acid
PublicationZbadano proces elektrolitycznego osadzania niklu z roztworów siarczanowych zawierających kwas malonowy lub winowy jako bufor zamiast kwasu borowego. Badano wpływ gęstości prądu katodowego, pH roztworu i temperaturę. Określono pojemność buforową i wgłębność kąpieli. Wyznaczono wydajności prądowe, twardość oraz połysk powłok niklowych otrzymanych z badanych kąpieli. Określono optymalne warunki pracy kąpieli i wykazano jej zalety...
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Synthesis of Cyano-Benzylidene Xanthene Synthons Using a Diprotic Brønsted Acid Catalyst, and Their Application as Efficient Inhibitors of Aluminum Corrosion in Alkaline Solutions
PublicationNovel cyano-benzylidene xanthene derivatives were synthesized using one-pot and condensation reactions. A diprotic Brønsted acid (i.e., oxalic acid) was used as an effective catalyst for the promotion of the synthesis process of the new starting xanthene–aldehyde compound. Different xanthene concentrations (ca. 0.1–2.0 mM) were applied as corrosion inhibitors to control the alkaline uniform corrosion of aluminum. Measurements were...
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Performance tuning of chitosan-based membranes by protonated 2-Pyrrolidone-5-carboxylic acid-sulfolane DES for effective water/ethanol separation by pervaporation
PublicationToday, the applicability of deep eutectic solvents (DES) in various fields, including membrane science and technology, is extensively investigated. In pioneering works, we have implemented different DES as a component of chitosan (CS)-based flat membranes for pervaporation (PV) separation. Herein, we present a new protonated (by sulphuric acid) 2-Pyrrolidone-5-carboxylic acid: sulfolane DES, as a green additive for its chemical...
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Artificial neural network prophecy of ion exchange process for Cu (II) eradication from acid mine drainage
PublicationThe removal of heavy metal ions from wastewater was found to be significant when the cation exchange procedure was used effectively. The model of the cation exchange process was built using an artificial neural network (ANN). The acid mine drainage waste’s Cu(II) ion was removed using Indion 730 cation exchange resin. Experimental data from 252 cycles were recorded. In a column study, 252 experimental observations validated the...
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Locally sculptured modification of the electrochemical response of conductive poly(lactic acid) 3D prints by femtosecond laser processing
PublicationThis manuscript presents an approach to sculpture high electrochemical activity of the 3D printed electrodes with poly(lactic acid) (PLA) matrix and carbon black (CB) filler by femtosecond laser (FSL) ablation. CB-PLA utility for electrochemical applications depends on a surface modification aiming to remove the PLA and uncover the conductive CB. We have discussed how laser pulse energy is critical for such an activation process....
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Photodynamic therapy with 5-aminolevulinic acid and diamino acid derivatives of protoporphyrin IX reduces papillomas in mice without eliminating transformation into squamous cell carcinoma of the skin
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Influence of hydrochloric acid concentration and type of nitrogen source on the electrochemical performance of TiO2/N-MoS2 for energy storage applications
PublicationIn this work, nitrogen-doped molybdenum sulfide was directly deposited on titanium dioxide nanotubes substrate (TiO2/N-MoS2) during hydrothermal synthesis. The study focuses on the influence of hydrochloric acid concentration used for the synthesis, with the results indicating its essential role in thioacetamide hydrolysis and thus in the effectiveness of the N-MoS2 deposition. The electrode material itself is characterized by...
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Solid-State Modification of Poly(butylene terephthalate) with a Bio-Based Fatty Acid Dimer Diol Furnishing Copolyesters with Unique Morphologies
PublicationCopolyesters based on poly(butylene terephthalate) (PBT) and a bio-based fatty acid dimer diol (FADD) were prepared by solid-state modification (SSM). The chemical incorporation of the FADD into the backbone of the PBT was proven using various techniques. It was clear that the incorporation rate was diffusion-limited rather than reaction-limited. From quantitative 13C NMR a nonrandom chemical microstructure was obtained at all...
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Bimetallic Bi/Cu0-catalyzed persulfate-based advanced oxidation processes towards clofibric acid degradation in wastewater
PublicationClofibric acid (CFA), an important blood-lipid regulatory drug is an emerging organic pollutant and widely reported in water resources. A novel bimetallic, bismuth/zero valent cupper (Bi/Cu0) catalyst was prepared which showed better physiological, structural, and catalytic properties than Cu0. The Bi/Cu0 effectively catalyzed persulfate (S2O82−) and caused 85% degradation of CFA. The Bi coupling improved reusability and stability...
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Characterization of a single-stranded DNA-binding-like Protein from Nanoarchaeum equitans - a nucleic acid binding protein with broad substrate specificity
PublicationBackground SSB (single-stranded DNA-binding) proteins play an essential role in all living cells and viruses, as they are involved in processes connected with ssDNA metabolism. There has recently been an increasing interest in SSBs, since they can be applied in molecular biology techniques and analytical methods. Nanoarchaeum equitans, the only known representative of Archaea phylum Nanoarchaeota, is a hyperthermophilic, nanosized,...
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Porosity and swelling properties of novel polyurethane–ascorbic acid scaffolds prepared by different procedures for potential use in bone tissue engineering
PublicationIn this work, a novel polyurethane (PU) system based on poly(ethylene-butylene) adipate diol, 1,6-hexamethylene diisocyanate, 1,4-butanediol, and ascorbic acid was used to prepare scaffolds with potential applications in bone tissue engineering. Two fabrication methods to obtain porous materials were chosen: phase separation (PS)/salt particle leaching (PL) and solvent casting (SC)/salt PL. The calculated porosity demonstrated...
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Peptide modification with thiomalonoamide moiety
PublicationAbstract: Meldrum acid derivatives under the thermal decomposition are well known source of ketenes. Recently we investigated chemical properties of thiocarbamolyl meldrum acids. We found that 5-(α-alkylamino- α'-sulfhydryl)methylene Meldrum's acids hated in the presence of amines produce thiomalonamides. We used this reaction to the one pot synthesis of series of short peptides containing thiomalonoamide motif.
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Development of an asymmetric cellulose acetate-ionic liquid P6,6,6,14[PHOS] gel membrane for the perstraction of succinic acid from a model fermentation solution of yarrovia lipolytica
PublicationThis study introduces a novel approach to separate succinic acid (SA) from fermentation mixtures using an asymmetric membrane based on the gelation of the ionic liquid [P6,6,6,14][PHOS] coated with two layers of cellulose acetate. The membrane was designed to explore the synergistic effect of polymer-ionic liquid interfaces according to the solution-diffusion theory. The gelation of the ionic liquid was achieved using 12-hydroxystearic...
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Fatty Acid-Binding Protein 7 (FABP-7), Glutamic Acid and Neurofilament Light Chain (NFL) as Potential Markers of Neurodegenerative Disorders in Psoriatic Patients—A Pilot Study
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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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Spectroscopic Studies of Amino Acid Ionic Liquid-Supported Schiff Bases
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Molecular self-assembly and optical activity of chiral thionooxalamic acid esters
PublicationZsyntezowano kilka optycznie czynnych estrów dietylowych kwasu bis(tiooksamowego). Związki te, z powodu ich zdolności do tworzenia ze sobą komplementarnych cyklicznych wiązań wodorowych, są potencjalnie użytecznym materiałem budulcowym większych układów supramolekularnych. Odpowiednie układy modelowe otrzymano z optycznie czynnych 1,2-diamin, które poddano acylowaniu chlorooksooctanem etylu, a następnie otrzymane półprodukty tionowano...
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Effect of citric acid esterification conditions on the properties of the obtained resistant starch
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In Depth Analysis of Chiroptical Properties of Enones Derived from Abietic Acid
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Double amino acid – A novel molecule enabling peptide interpenetrating structures
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Modulation of TET2 Activity By Ascorbic Acid and Factors Affecting Lysine Acetylation
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Thermal properties of rare earth elements complexes with 1,3,5-benzenetricarboxylic acid
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Bringing a New Flexible Mercaptoacetic Acid Linker to the Design of Coordination Polymers
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Some properties of Nd and Er complexes with 1,2,3,4,5,6-benzenehexacarboxylic (mellitic) acid
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Serum Fatty Acid-Binding Protein 4 is Increased in Patients with Psoriasis
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Recovery of hydrochloric acid from metal pickling solutions by membrane distillation
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Thermal degradation of butyl acrylate-methyl acrylate-acrylic acid-copolymers
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Determination of Flavonoids, Tannins and Ellagic acid in leaves fromRubus L. species
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Spectroscopic insight into supramolecular assemblies of boric acid derivatives and β-cyclodextrin
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Effect of renal replacement therapy on selected arachidonic acid derivatives concentration
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3D composites based on the blends of chitosan and collagen with the addition of hyaluronic acid
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