Search
Filters
total: 2002
filtered: 1568
-
Catalog
Chosen catalog filters
displaying 1000 best results Help
Search results for: PHOSPHOTUNGSTIC ACID
-
Monomeric Triphosphinoboranes: Intramolecular Lewis Acid–Base Interactions between Boron and Phosphorus Atoms
PublicationHerein, we present the synthesis of the first fully characterized monomeric triphosphinoboranes. The simple reaction of boron tribromide with three equivalents of bulky lithium phosphide tBu2PLi yielded triphosphinoborane (tBu2P)3B. Triphosphinoboranes with diversified phosphanyl substituents were obtained via a two-step reaction, in which isolable bromodiphosphinoborane (tBu2P)2BBr is first formed and then reacts with one equivalent...
-
Photoresponsive Amide-Based Derivatives of Azobenzene-4,4′-Dicarboxylic Acid—Experimental and Theoretical Studies
PublicationAzobenzene derivatives are one of the most important molecular switches for biological and material science applications. Although these systems represent a well-known group of compounds, there remains a need to identify the factors influencing their photochemical properties in order to design azobenzene-based technologies in a rational way. In this contribution, we describe the synthesis and characterization of two novel amides...
-
Virtual hearing aid - multimedia tool for demonstrating hearing aid benefits
PublicationWiększość osób niedosłyszących nie jest świadoma wszystkich możliwości korekcji ubytku słuchu. Wykorzystując techniki multimedialne można stworzyć oprogramowanie, które znacznie ułatwi i przybliży proces dopasowania aparatów słuchowych. Celem przeprowadzonych eksperymentów było opracowanie multimedialnego systemu, który pozwala zrealizować następujące funkcje: - pomiar charakterystyki dynamiki słuchu, - wyznaczanie charakterystyki...
-
Chlorogenic acids – their properties, occurrence and analysis
Publication -
Study on the concentration of acids by membrane distillation
Publication -
Chirality Measures of α-Amino Acids
Publication -
Modification of Bacterial Cellulose with Quaternary Ammonium Compounds Based on Fatty Acids and Amino Acids and the Effect on Antimicrobial Activity
Publication -
Interspecies distances between propionic acid degraders and methanogens in syntrophic consortia for optimal hydrogen transfer
PublicationA mixed culture from an anaerobic biowaste digester was enriched on propionate and used to investigate interspecies hydrogen transfer in dependence of spatial distances between propionate degraders and methanogens. From 20.3 mM propionate, 20.8 mM acetate and 15.5 mM methane were formed. Maximum specific propionate oxidation and methane formation rates were 49 and 23 mmol mg−1day−1, respectively. Propionate oxidation was inhibited by...
-
Investigation of corrosion behavior of 6060 and 6082 aluminum alloys under simulated acid rain conditions
PublicationInstantaneous impedance changes of 6060 and 6082 type aluminum alloys in pure water, and simulated acid rain poured into the pure water was investigated by dynamic electrochemical impedance spectroscopy (DEIS). In this way, the influence of aluminum content on the corrosion behavior of 6060 and 6082 type aluminum alloys immersed in simulated acid rain was determined. The corrosion rate of the alloy decreased with increasing Al...
-
Synthesis and biological activity of ester derivatives of mycophenolic acid and acridines/acridones as potential immunosuppressive agents
PublicationImproved derivatives of mycophenolic acid (MPA) are necessary to reduce the frequency of adverse effects, this drug exerts in treated patients. In this study, MPA was coupled with N-(x-hydroxyalkyl)-9-acridone-4-carboxamides or N-(x-hydroxyalkyl)acridine-4-carboxamides to give respective ester conjugates upon Yamaguchi protocol. This esterification required protection of phenol group in MPA. Designed conjugates revealed higher...
-
Inactivation of glucosamine-6-phosphate synthase by N3-oxoacyl derivatives of L-2,3-diaminopropanoic acid
PublicationN3-oksoacylowe pochodne kwasu l-2,3-diaminopropanowego zawierające ugrupowanie epoksydowe lub układ sprzężonych wiązań podwójnych inaktywują syntaze glukozamino-6-fosforanu (GlcN-6-P) z S. cerevisiae. Wyniki badań kinetycznych inaktywacji enzymu wskazują na dwuetapowy przebieg tej reakcji, przy czym tworzenie kompleksu enzym:ligand poprzedza nieodwracalną modyfikację enzymu. Badane związki różniły się powinowactwem do centrum aktywnego...
-
Synthesis and biological activity of novel mycophenolic acid conjugates containing nitro-acridine/acridone derivatives
PublicationOpracowano warunki reakcji kwasu mykofenolowego z aminowymi pochodnymi akrydyn i akrydonów. Tak otrzymane koniugaty zostały scharakteryzowane, a następnie przebadane in vitro pod względem aktywności przeciwbiałaczkowej oraz immunosupresyjnej.
-
Effect of acid whey on physicochemical characteristics of dry-cured organic pork loins without nitrite
Publication -
Significant enhancement of citric acid production by Yarrowia lipolytica immobilized in bacterial cellulose-based carrier
Publication -
The new esters derivatives of betulin and betulinic acid in epidermoid squamous carcinoma treatment – In vitro studies
Publication -
8-Oxo-7,8-dihydroguanine and uric acid as efficient predictors of survival in colon cancer patients
Publication -
Modulating D-amino acid oxidase (DAAO) substrate specificity through facilitated solvent access
Publication -
Preparation of a Ceramic Matrix Composite Made of Hydroxyapatite Nanoparticles and Polylactic Acid by Consolidation of Composite Granules
Publication -
Expression Changes in Fatty acid Metabolic Processrelated Genes in Porcine Oocytes During in Vitro Maturation
Publication -
Preparation and characterization of activated carbons obtained from the waste materials impregnated with phosphoric acid(V)
Publication -
Effects of strongly aggregated silica nanoparticles on interfacial behaviour of water bound to lactic acid bacteria
Publication -
The level of jasmonic acid in Arabidopsis thaliana and Phaseolus coccineus plants under heavy metal stress
Publication -
Synthesis and Modification by Carbonization of Styrene–Ethylene Glycol Dimethacrylate–Lignin Sorbents and their Sorption of Acetylsalicylic Acid
Publication -
On the origin of surfaces-dependent growth of benzoic acid crystal inferred through the droplet evaporation method
PublicationCrystal growth behavior of benzoic acid crystals on different surfaces was examined. The performed experiments documented the existence of very strong influence introduced by polar surfaces as glass, gelatin, and polyvinyl alcohol (PVA) on the growth of benzoic acid crystals. These surfaces impose strong orientation effect resulting in a dramatic reduction of number of faces seen with x-ray powder diffractions (XPRD). However,...
-
On the origin of surfaces-dependent growth of benzoic acid crystal inferred through the droplet evaporation method
PublicationCrystal growth behavior of benzoic acid crystals on different surfaces was examined. The performed experiments documented the existence of very strong influence introduced by polar surfaces as glass, gelatin, and polyvinyl alcohol (PVA) on the growth of benzoic acid crystals. These surfaces impose strong orientation effect resulting in a dramatic reduction of number of faces seen with x-ray powder diffractions (XPRD). However,...
-
On the origin of surfaces-dependent growth of benzoic acid crystal inferred through the droplet evaporation method
PublicationCrystal growth behavior of benzoic acid crystals on different surfaces was examined. The performed experiments documented the existence of very strong influence introduced by polar surfaces as glass, gelatin, and polyvinyl alcohol (PVA) on the growth of benzoic acid crystals. These surfaces impose strong orientation effect resulting in a dramatic reduction of number of faces seen with x-ray powder diffractions (XPRD). However,...
-
Elucidation of the effect of some cholinium amino acid ionic liquids on the thermal and the conformational stability of insulin
Publication -
The usefulness of ascorbic acid degradation to analyze the effectiveness of water filtration in household water filter jugs
Publication -
Preliminary Investigation on Rapid Potassium Efflux from Activated Sludge in Response to Use of Peroxyacetic Acid
PublicationPreliminary research on activated sludge potassium efflux (GGKE - glutathione-gated potassium efflux) as a result of peroxyacetic acid (PAA) dosing were performed. Similarily as in case of chlorine dosing the PAA dosing causes initiation of bacteria defense mechanisms, related to the transformations of glutathione tripeptide, resulting in the increase of potassium ions concentration in the activated sludge environment. In the range...
-
A spectroscopic study of the cis/trans-isomers of penta-2,4-dienoic acid attached to gold nanoclusters
PublicationIn this theoretical work, we present a spectroscopic analysis of the cis/trans-isomers of a molecular switch, penta-2,4-dienoic acid, attached to gold clusters of different size (1, 2 and 20 gold atoms). We have simulated 4 different spectroscopic techniques: Infrared spectroscopy, normal Raman scattering, absorption spectra and resonance Raman scattering. We discuss how the position and the conformation of the molecule determine...
-
FERTILIZER CONTAINING 5-AMINOLEVULINIC ACID AFFECTS SOUR CHERRY FRUIT QUALITY AND BIOLOGICAL CHARACTERISTICS
Publication -
Short-Term Effects of Intra-Articular Hyaluronic Acid Administration in Patients with Temporomandibular Joint Disorders
Publication -
The acid strength of the HF/AlX3 Lewis-Brønsted complexes involving various electron acceptors as ligands
Publication -
Effect of TiO2 Precursor on the Photoactivity of Fe-C-TiO2 Photocatalysts for Acid Red (AR) Decomposition
Publication -
Total cross section for low-energy electron scattering from formic acid, (HCOOH), molecules
PublicationTotal cross section (TCS) for low-energy electron scattering from formic acid molecules has been measured using electrostatic electron spectrometer working in linear transmission mode. Two local maxima centered around 1.7 eV and 7.8 eV have been observed and associated with resonant scattering processes.
-
Curing epoxy with ethylenediaminetetraacetic acid (EDTA) surface-functionalized Co Fe3-O4 magnetic nanoparticles
PublicationIn this work, the bulk and surface composition of Fe3O4 supermagnetic nanoparticles were modified for efficient epoxy curing. The bare, ethylenediaminetetraacetic acid (EDTA) capped, and cobalt (Co)-doped EDTA capped Fe3O4 nanoparticles were synthesized electrochemically. The crystalline structure and phase information, surface capping, morphology and magnetization behavior of nanoparticles were studied by X-Ray diffraction (XRD),...
-
Immobilization technique for enhanced production of the immunosuppressant mycophenolic acid by ultraviolet and gamma-irradiated Penicillium roqueforti
Publication -
Tuning of the Anti-Breast Cancer Activity of Betulinic Acid via Its Conversion to Ionic Liquids
Publication -
New amino acid propyl ester ibuprofenates from synthesis to use in drug delivery systems
Publication -
Effect of acid whey-fortified breads on caecal fermentation processes and blood lipid profile in rats
Publication -
Retinoic acid‐induced autoantigen‐specific type 1 regulatory T cells suppress autoimmunity
Publication -
Mineral composition and bioavailability of calcium and phosphorus from acid whey concentrated by various membrane processes
Publication -
Synthesis and Application of Cobalt-based Metal-organic Framework for Adsorption of Humic Acid from Water
Publication -
New Insight into the Synthesis and Biological Activity of the Polymeric Materials Consisting of Folic Acid and β‐Cyclodextrin
Publication -
Amber extract as a bio‐additive to poly(lactic acid) films: Multimethod analysis of crystallinity and stability
Publication -
Ammonium Enhances Food Waste Fermentation to High-Value Optically Active l-Lactic acid
Publication -
Structure, thermal and mechanical properties of copoly(ester amide)s based on 2,5‐furandicarboxylic acid
Publication -
Enzymatically catalyzed furan-based copolyesters containing dimerized fatty acid derivative as a building block
Publication -
Preparation and characterization of collagen/chitosan/hyaluronic acid thin films for application in hair care cosmetics
Publication -
Incorporation of magnetite particles in 3D matrices made from the blends of collagen, chitosan, and hyaluronic acid
Publication