Wyniki wyszukiwania dla: ORGANOPHOSPHORUS CHEMISTRY

Investigation on air quality of specific indoor environments—spa salons located in Gdynia, Poland

Publikacja

- ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH - Rok 2021

Due to excessive application of essential oils and scented products in spa salons during aromatherapy and massage sessions, the elevated concentration of total volatile organic compounds (TVOCs), particularly terpenes, which are known as secondary organic aerosol (SOA) precursors, is expected there. This study was aimed at determination of VOCs with a particular regard to terpenes in air samples collected in selected spa salons...

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Enhanced hydrogen evolution reaction on highly stable titania-supported PdO and Eu2O3 nanocomposites in a strong alkaline solution

Publikacja

M. Ibrahim
A. Mezni
M. Alsawat
T. Kumeriah
M. Das
S. Alzahly
A. Aldalbahi
K. Górnicka
J. Ryl
M. Amin
T. Altalhi

- INTERNATIONAL JOURNAL OF ENERGY RESEARCH - Rok 2019

In this work, PdO/TiO2 and Eu2O3/TiO2 nanocomposites (NCs), were synthesized using a new facile, template-free and one-step solvothermal approach, and characterized by several instrumentation techniques. X-ray photoelectron spectroscopy (XPS) studies revealed the presence of oxidised form of the Pd and Eu nanoparticles within the nanocomposite materials (PdO and Eu2O3). The two catalysts exhibited remarkable activity for the HER...

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The occurence and diagnosis of biomarkers of ethyl alcohol consumption

Publikacja

M. K. Woźniak
M. Wiergowski
M. Biziuk

- UWM Law Review - Rok 2015

Ethyl alcohol is a legal and a widely available psychoactive drug. However, its excessive consumption causes addiction. This leads to aggressive behaviors, family battery, difficulties in interpersonal relations, legal offences, suicides, car accidents and deterioration in labor productivity, what causes financial problems. Despite many social actions against alcohol consumption, this problem is still unresolved. Therefore, fast...

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Progress in ATRP-derived materials for biomedical applications

Publikacja

M. Khodadadiyazdi
P. Zarrintaj
M. Saeb
M. Mozafari
S. A. Bencherif

- PROGRESS IN MATERIALS SCIENCE - Rok 2024

The continuing wave of technological breakthroughs and advances is critical for engineering well- defined materials, particularly biomaterials, with tailored microstructure and properties. Over the last few decades, controlled radical polymerization (CRP) has become a very promising option for the synthesis of precise polymeric materials with an unprecedented degree of control over mo lecular architecture. Atom transfer radical...

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Insights into the microbial community of treated wastewater, its year-round variability and impact on the receiver, using cultivation, microscopy and amplicon-based methods

Publikacja

- SCIENCE OF THE TOTAL ENVIRONMENT - Rok 2022

Apart from chemical constituents, wastewater treatment plant (WWTP) effluents also release microorganisms that can be important to the receiving water bodies either from a sanitary point of view, or taking to the account the biogeochemical potential of the recipients. However, little is known about the treated wastewater microbial community, its composition, seasonal changes, functions and fate in the waters of the receiver. Thus,...

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Tailoring Defects in B, N-Codoped Carbon Nanowalls for Direct Electrochemical Oxidation of Glyphosate and its Metabolites

Publikacja

- ACS Applied Materials & Interfaces - Rok 2024

Tailoring the defects in graphene and its related carbon allotropes has great potential to exploit their enhanced electrochemical properties for energy applications, environmental remediation, and sensing. Vertical graphene, also known as carbon nanowalls (CNWs), exhibits a large surface area, enhanced charge transfer capability, and high defect density, making it suitable for a wide range of emerging applications. However, precise...

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Metallurgical characterization and high-temperature tensile failure of Inconel 617 alloy welded by GTAW and SMAW—a comparative study

Publikacja

S. Sirohi
N. Kumar
A. Kumar
S. M. Pandey
B. Adhithan
D. Fydrych
C. Pandey

- PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS - Rok 2023

Two types of the weld joint of Inconel 617 alloy were produced using gas tungsten arc welding (GTAW) and shielded metal arc welding (SMAW) processes with ERNiCrCoMo-1 filler metal and ENiCrCoMo-1 electrode, respectively. The weld metal showed the segregation of the principle alloying elements like Mo and Cr along the inter-dendritic spaces, triggering the formation of secondary phases. The microstructure characterization of the...

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Pollutant deposition via dew in urban and rural environment, Cracow, Poland

Publikacja

P. Muskała
M. Sobik
M. Błaś
Ż. Polkowska
A. Bokwa

- ATMOSPHERIC RESEARCH - Rok 2015

This study is a comparative analysis of dew in rural and urban environment. Dew samples were collected between May and October, 2009 in two reference stations in southern Poland: Cracow and Gaik-Brzezowa. The investigation included comparison of volume and chemistry of the collected samples. Due to its formation mechanisms, dew is a good indicator of air pollution. Following parameters were analyzed in 159 collected samples: pH,...

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Chemiluminogenic acridinium salts: A comparison study. Detection of intermediate entities appearing upon light generation

Publikacja

J. Czechowska
A. Kawecka
A. Romanowska
M. Marczak
P. Wityk
K. Krzymiński
B. Zadykowicz

- JOURNAL OF LUMINESCENCE - Rok 2017

The nine derivatives of acridine-9-carboxylic acid (CMADs) capable for chemiluminescence (CL), representing various classes of compounds were isolated in a chemically pure state (assessed by RP-HPLC) and identified using high resolution mass spectrometry (ESI-QTOF) and magnetic resonance (1H NMR) techniques. Among them are aryl acridinium esters, containing certainly selected and located substituents in both aromatic systems, an...

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CE-MS and GC-MS as “Green” and Complementary Methods for the Analysis of Biogenic Amines in Wine

Publikacja

M. Woźniakiewicz
A. Woźniakiewicz
P. Nowak
E. Kłodzińska
J. Namieśnik
J. Płotka-Wasylka

- Food Analytical Methods - Rok 2018

Two novel complementary analytical methods, namely an extraction-free capillary electrophoresis coupled to mass spectrometry (CE-MS) and direct immersion-solid-phase microextraction combined with gas chromatography-mass spectrometry (DI-SPME-GC-MS), have been developed and successfully applied for the determination of biogenic amines (BAs) in wine and fruit wine. They have been rigorously compared to each other in terms of various...

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Tribo-Environment Dependent Chemical Modification of Sliding Interfaces in Ultrananocrystalline Diamond Nanowall Film: A Correlation with Friction and Wear

Publikacja

R. Rani
K. Panda
N. Kumar
S. Kamatchi
R. Pandian
M. Ficek
R. Bogdanowicz
K. Haenen
I. Lin

- Journal of Physical Chemistry C - Rok 2018

Tribological properties of ultrananocrystalline diamond nanowall (UNCD NW) films were investigated quantitatively in three different and controlled tribo-environmental conditions, proposing the passivation and graphitization mechanisms. However, these mechanisms are rather complicated and possibly can be understood in well-controlled tribological conditions. It was shown that the friction and wear of these films were high in highPage 1...

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Determining pesticide contamination in honey by LC-ESI-MS/MS - Comparison of pesticide recoveries of two liquid-liquid extraction based approaches

Publikacja

M. Kujawski
Ż. Bargańska
K. Marciniak
E. Miedzianowska
J. Kujawski
M. Ślebioda
J. Namieśnik

- LWT-FOOD SCIENCE AND TECHNOLOGY - Rok 2014

Honey, a valuable food product, may be contaminated by xenobiotics during its production and/or harvest. The determination of trace levels of contaminants in a complex matrix like honey still presents a challenge to analytical chemists. The aim of this work was to assess and compare the extraction efficiencies of 30 pesticide residues (acaricides, insecticides, herbicides, fungicides), belonging to over 15 different chemical classes....

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New Trends in Sample Preparation Techniques for the Analysis of the Residues of Pharmaceuticals in Environmental Samples

Publikacja

- Current Analytical Chemistry - Rok 2015

Pharmaceutical residues in the environment is a field of special interest due to the adverse effects to either human health or aquatic and soil environment. Pharmaceuticals have been already detected in underground, surface and wastewaters, soils, manure and sediments. The growing awareness of environmental pollution arising from human activity forces the need for their comprehensive determination. Environmental samples are complex...

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Chemical surface etching methods for ground tire rubber as sustainable approach for environmentally-friendly composites development– a review

Publikacja

M. M. Phiri
M. J. Phiri
K. Formela
S. P. Hlangothi

- COMPOSITES PART B-ENGINEERING - Rok 2021

Ground tire rubber (GTR) has been used as a sustainable low-cost modifier in various composites. However, due to the hydrophobic nature of GTR, it is in compatible with most matrices and results in deterioration in both mechanical and physical properties of composites. This necessitates pre-modification of the powdered rubber to improve the interfacial bonding at the rubber-matric interface. The most common GTR modification research...

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Żółte barwniki organiczne w XIX-wiecznych farbach Jana Matejki - identyfikacja substancji barwiących, nośników, oraz wypełniaczy

Publikacja

O. Otłowska
M. Śliwka-Kaszyńska
M. Wachowiak
G. Trykowski

- Acta Universitatis Nicolai Copernici. Zabytkoznawstwo i Konserwatorstwo - Rok 2015

Naturalne barwniki organiczne można znaleźć w wielu obiektach dziedzictwa kulturowego. Identyfikacja substancji barwiących obecnych w farbach historycznych dostarcza istotnych informacji dla wielu specjalistów zaangażowanych w naukę o sztuce. Identyfikacja składu farb pozwala na zastosowanie odpowiednich procedur dotyczących renowacji i konserwacji historycznych dzieł sztuki. Informacje te pozwalają na ich renowację zgodnie z decyzjami...

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Sensitive method for determination of benzoic acid in beverages and food samples using air–assisted hydrophobic deep eutectic solvent-based dispersive liquid-liquid microextraction

Publikacja

H. Haq

- Sustainable Chemistry and Pharmacy - Rok 2024

A simple, reliable and rapid air–assisted hydrophobic deep eutectic solvent-based dispersive liquid–liquid microextraction (AA-HDES-DLLME) was developed for analysis of benzoic acid in various beverages and food samples. The final determination stage was performed via UV–visible spectrophotometry. The key parameters (extraction time, HDES type and volume, dispersant volume, pH and sample volume) of the AA-HDES-DLLME method were...

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Ring Opening of Triflates Derived from Benzophospholan-3-one Oxides by Aryl Grignard Reagents as a Route to 2‑Ethynylphenyl(diaryl)phosphine Oxides

Publikacja

Ł. Ponikiewski
S. Sowa

- JOURNAL OF ORGANIC CHEMISTRY - Rok 2021

A new simple method for the synthesis of 2-ethynylphenyl(diaryl)phosphine oxides via ring opening of benzophosphol-3-yl triflates has been developed. This process occurs via nucleophilic attack of a Grignard reagent at the phosphorus center, which results in ring opening and cleavage of a leaving group. The reaction proceeds under mild conditions and, within 15−60 min, leads to a library of previously unavailable 2-ethynylphenylphosphine...

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Generalized Zero Range Potentials and Multichannel Electron Molecule Scattering.

Publikacja

S. Leble
S. Yalunin

- RADIATION PHYSICS AND CHEMISTRY - Rok 2003

Zagadnienie o rozpraszaniu elektronów na molekułach rozwiązuje się w sposób jawny w modelu potencjałów o zerowym promieniu. Uwzględniając stany wzbudzone wprowadzamy potencjał macierzowy. Dla przykładu stanów wibracyjnych e+H_2 porównujemy wyniki obliczeń przekrojów czynnych z innymi (ab initio) oraz z doświadczeniem.

Rational design, synthesis and biological evaluation of thiadiazinoacridines: a new class of antitumor agents.

Publikacja

I. Antonini
D. Cacciamani
M. Konieczny
A. Magnano
S. Martelli
J. Paradziej-Łukowicz
P. Polucci

- BIOORGANIC & MEDICINAL CHEMISTRY - Rok 2003

Zsyntetyzowano serię związków o potencjalnej zdolności do wiązania się z DNA z grupy tiadiazinoakrydyn poprzez cyklizację odpowiednich pochodnych 9-imino-4-nitro-9,10-dihydroakrydyny. Zbadano ich zdolność do wiązania się z DNA oraz cytotoksyczność względem kilku linii komórek nowotworwych. Badania aktywności przeciwnowotworowej wobec białaczki P388 wskazały na zgodność tych wyników z wynikami cytotoksyczności in vitro. Wykazano,...

Critical minima in elastic scattering of electrons from Ar and Zn.

Publikacja

J. E. Sienkiewicz
S. Telega
P. Syty
S. Fritzsche

- RADIATION PHYSICS AND CHEMISTRY - Rok 2003

Dokonano obliczeń różniczkowych przekrojów czynnych na sprężyste rozpraszanie elektronów na atomach argonu i cynku. Otrzymane minimum krytyczne z tych przekrojów porównano z niedawno otrzymanymi danymi doświadczalnymi.

Relativistic multiconfiguration method in low energy scattering of electrons from xenon atoms.

Publikacja

P. Syty
J. E. Sienkiewicz
S. Fritzsche

- RADIATION PHYSICS AND CHEMISTRY - Rok 2003

Po raz pierwszy dokonano obliczeń różniczkowych przekrojów czynnych na sprężyste rozpraszanie elektronów na atomach ksenonu przy użyciu relatywistycznej wersji metody wielokonfiguracyjnej.

Validation of dynamic electrochemical impedance spectrograms using autocorrelation function

Publikacja

- JOURNAL OF ELECTROANALYTICAL CHEMISTRY - Rok 2024

Validation of impedance data is essential for checking the reliability of experimental data. Kramers – Kronig transformation is used to verify data obtained from classical Electrochemical Impedance Spectroscopy (EIS) measurements. Data obtained from Dynamic Electrochemical Impedance Spectroscopy (DEIS) could be validated in the same way, but in this case, there is no information about internal consistency between every single spectrum...

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Research of chitosan coatings deposited by electrophoretic deposition method at various voltage and time parameters

Publikacja

- MATERIALS CHEMISTRY AND PHYSICS - Rok 2024

The aim of this research is to estimate the electrophoretic deposition main parameters, such as voltage and time duration, that will provide optimal characteristics of the surface layer. Chitosan coatings were synthesized on biomedical Ti13Zr13Nb alloys at 20 V and 30 V and with deposit times of 2min, 5 min, 10 min, and 15 min. Evaluation of the coating was performed by using Scanning Electron Microscope (SEM), Energy-Dispersive...

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Protein overproduction alters exosome secretion in Chinese hamster ovary cells

Publikacja

A. Steć
M. Targońska
E. Karkosińska
M. Słowik
A. Płoska
L. Kalinowski
B. Wielgomas
K. Waleron
J. Jasiecki
S. Dziomba

- ANALYTICAL AND BIOANALYTICAL CHEMISTRY - Rok 2023

Despite the abundance of available cell lines, nearly 70% of all recombinant therapeutic proteins today are produced in Chi-nese hamster ovary (CHO) cells. The impact of protein overproduction on the secretion of exosomes by CHO cells has been investigated here. Increased secretion of extracellular vesicles (EVs) by protein overexpressing CHO cells was demonstrated with protein content assay, nanoparticle tracking analysis, and...

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Plant-based meat substitute analysis using microextraction with deep eutectic solvent followed by LC-MS/MS to determine acrylamide, 5-hydroxymethylfurfural and furaneol

Publikacja

- ANALYTICAL AND BIOANALYTICAL CHEMISTRY - Rok 2024

For the analysis of plant-based meat substitutes and the determination of Maillard reaction products such as acrylamide, 5-hydroxymethylfurfural and furaneol, a novel and effective procedure based on hydrophobic natural deep eutectic solvent and liquid chromatography coupled with tandem mass spectrometry was developed for the first time. The 49 compositions of the deep eutectic solvents were designed and screened to select the...

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MXene-based materials as adsorbents, photocatalysts, membranes and sensors for detection and removal of emerging and gaseous pollutants: A comprehensive review

Publikacja

M. H. Dehghani
N. Hussain Solangi
N. M. Mubarak
N. Rajamohan
S. Bosu
A. Othmani
M. Ahmaruzzaman
S. Ranjan Mishra
B. Bhattacharjee
V. Gadore... i 8 innych

- Arabian Journal of Chemistry - Rok 2025

2D materials have garnered significant attention as potential solutions to various environmental challenges. Graphene, molybdenum disulfide, MXenes, and boron nitride have emerged as the most popular candidates among these materials. This article presents a comprehensive review and discussion on the emerging applications of MXenes in environmental engineering. MXenes have demonstrated immense potential as future materials for adsorption...

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Application of normal-phase high-performance liquid chromatography followed by gas chromatography for analytics of diesel fuel additives

Publikacja

G. Boczkaj
M. Jaszczołt
A. Przyjazny
M. Kamiński

- ANALYTICAL AND BIOANALYTICAL CHEMISTRY - Rok 2013

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Strukturuvannaa epoksi-oligoesternih sumiščej v prisutnosti peroksidnoï pohidnoï epoksidnoï smoli ED-20

Publikacja

M. Bratyczak
T. Czervinskij
M. Gagin
J. Namieśnik
A. Mietlarek-Kropidłowska

- Ukrainian Chemistry Journal - Rok 2006

W pracy przedstawiono wyniki badań sieciowania mieszanin epoksyoligoestrów opartych na żywicy epoksydowej ED-20 (w tym modyfikowanej) oraz m.in. na oligoestroakrylanie TGM-3, przy czym jako utwardzacz zastosowano polietylenopoliaminę (PEPA).Usieciowane tworzywa analizowano pod kątem wpływu składu mieszaniny, ilości poszczególnych składników, jak również czasu i temperatury prowadzenia procesu na zawartość frakcji żelowej oraz twardość...

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Mechanism of a Four-Phase Liquid Membrane Oscillator Containing Hexadecyltrimethylammonium Bromide

Publikacja

- JOURNAL OF PHYSICAL CHEMISTRY A - Rok 2006

Badano zachowanie nitrometanowego oscylatora z membraną ciekłą zawierającego kationowy surfaktant. Początkowo układ składał się z trzech faz: wodnej donorowej zawierającej surfaktant i etanol, membrany ciekłej (kwas pikrynowy w nitrometanie) oraz fazy wodnej akceptorowej zawierającej sacharozę. Podczas procesu oscylacyjnego wytwarzała się nowa fazą X między membraną ciekłą, a fazą akceptorową. Stwierdzono oscylacje różnicy potencjału...

Esters of p-nitrophenol in synthesis of 1-N-monoamide and 1,7-bis-N,N-amide derivatives of 1,4,7,10-tetraazacyclododecane

Publikacja

A. Skwierawska

- POLISH JOURNAL OF CHEMISTRY - Rok 2006

W artykule opisana została synteza acylowych pochodnych 1,4,7,10-tetraazacyklododekanu przy pomocy estrów aktywnych. W bezpośredniej reakcji estrów 4-nitrofenylowych z cyklenem prowadzonej w bardzo łagodnych warunkach otrzymano pochodne mono i dipodstawienia z bardzo dobrymi wydajnościami. Zbadano również wpływ różnych parametrów na dystrybucję produktów.

Synthesis of 7-oxo-7h-naphto[1,2,3-de]quinoline derivatives as potential anticancer agents active on multidrug resistant cell lines

Publikacja

M. Dzieduszycka
M. Bontemps-Gracz
B. Stefańska
S. Martelli
A. Piwkowska
M. Arciemiuk
E. Borowski

- BIOORGANIC & MEDICINAL CHEMISTRY - Rok 2006

Opierając się na naszym wcześniejszym stwierdzeniu, że tetracykliczne analogi antrachinonów z wbudowanym pierścieniem pirydynowym wykazują aktywną cytotoksyczność względem komórek z indukowaną opornością, przeprowadzono syntezę pochodnych 7-oxo-7h-nafto[1,2,3-de]chinoliny (3, 6-8, 10-12, 14,15 i 18) posiadających jeden lub dwa zasadowe łańcuchy boczne i różne podstawniki w pierścieniu pirydynowym, związków o potencjalnym działaniu...

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Solvation of cobalt(II) ion in N,N-dimethylformamide-methanol mixed solvent: calorimetry and VIS spectroscopy studies

Publikacja

J. Szymańska-Cybulska
E. Kamieńska-Piotrowicz

- JOURNAL OF SOLUTION CHEMISTRY - Rok 2006

Zmierzono entalpie rozpuszczania trifluorometanosulfonianów Co(II) i Na(I) w mieszaninie N,N-dimetyloformamid(DMF)-metanol(MeOH) w całym zakresie jej składu. Z danych tych wyznaczono entalpie przeniesienia jonu Co(II) i jonu trifluorometanosulfonowego. Wyniki zanalizowano za pomocą teorii solwatacji preferencyjnej. Zmierzono również widma w zakresie widzialnym roztworów jonu Co(II) w mieszaninie DMF-MeOH i zanalizowano je, stosując...

Employment of passive sampling in monitoring indoor air quality in selected residences in a Tri-city area in Poland

Publikacja

- TOXICOLOGICAL AND ENVIRONMENTAL CHEMISTRY - Rok 2005

Time-weighted average concentrations of selected volatile compounds were measured in chosen residences in a Tri-City area of Poland by means of passive sampling. The results were compared to those obtained by dynamic technique – sorption tubes filled with Tenax TA sorbent. Results obtained by employing the two techniques were similar. Total volatile organic compound (TVOC) parameters were also determined. An attempt was also...

Joint time–frequency analysis of electrochemical noise

Publikacja

K. Darowicki
A. Zieliński
A. Zieliński
K. Darowicki

- JOURNAL OF ELECTROANALYTICAL CHEMISTRY - Rok 2001

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Instantaneous impedance spectra of a non-stationary model electrical system

Publikacja

K. Darowicki
J. Orlikowski
G. Lentka
K. Darowicki

- JOURNAL OF ELECTROANALYTICAL CHEMISTRY - Rok 2000

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Passive sampling and/or extraction techniques in environmental analysis: a review

Publikacja

- ANALYTICAL AND BIOANALYTICAL CHEMISTRY - Rok 2005

The current state-of-the-art of passive sampling and/or extraction methods for long-term monitoring of pollutants in different environmental compartments is discussed in this review. Passive dosimeters that have been successfully used to monitor organic and inorganic contaminants in air, water, sediments, and soil are presented. The application of new approaches to the determination of pollutants at the sampling stage is discussed....