Filters
total: 2135
filtered: 1965
displaying 1000 best results Help
Search results for: aqueous organic solvents
-
Elemental and organic carbon in aerosols over urbanized coastal region (southern Baltic Sea, Gdynia)
Publication -
A giant 2-dimensional dielectric response in a compressed hydrogen-bonded hybrid organic–inorganic salt
Publication -
Fluctuations of sodium, copper, zinc, iron and manganese in potato tubers in the organic and integrated production system
Publication -
Graphene nanoflakes functionalized with cobalt/cobalt oxides formation during cobalt organic framework carbonization
Publication -
Carbonized metal–organic frameworks with trapped cobalt nanoparticles as biocompatible and efficient azo-dye adsorbent
Publication -
Carbonized Lanthanum-Based Metal-Organic Framework with Parallel Arranged Channels for Azo-Dye Adsorption
Publication -
The role of biodegradable particulate and colloidal organic compounds in biological nutrient removal activated sludge systems
PublicationThe efficiency of denitrification and enhanced biological phosphorus removal in biological nutrient removal activated sludge systems is strongly dependent on the availability of appropriate carbon sources. Due to high costs of commercial compounds (such as methanol, ethanol, acetic acid, etc.) and acclimation periods (usually) required, the effective use of internal substrates is preferred. The aim of this study was to determine...
-
Highly stable organic–inorganic junction composed of hydrogenated titania nanotubes infiltrated by a conducting polymer
PublicationA poly(3,4-ethylenedioxythiophene) conducting polymer doped with poly(2-styrene sulfonate) (pEDOT:PSS) was efficiently electrodeposited on a layer composed of ordered titania nanotubes. TiO2 nanotubes were formed during an anodization process and, after calcinations, a layer was subjected to hydrogen plasma. Hydrogenation leads to Ti(III) formation, a decrease in resistance, and a huge increase of donor density when compared with...
-
Ag Loading Enhanced Photocatalytic Activity of g-C3N4 Porous Nanosheets for Decomposition of Organic Pollutants
Publication -
Assessment of soil microbial diversity measurements as indicators of soil functioning in organic and conventional horticulture systems
Publication -
Volatile organic compounds in gastrointestinal stromal tumour tissue originating from patient-derived xenografts
Publication -
Determination of carbamazepine in urine and water samples using amino-functionalized metal–organic framework as sorbent
Publication -
Effect of acid whey on physicochemical characteristics of dry-cured organic pork loins without nitrite
Publication -
Effect of Marination Time on the Antioxidant Properties of Peptides Extracted from Organic Dry-Fermented Beef
Publication -
Ag modified ZnO microsphere synthesis for efficient sonophotocatalytic degradation of organic pollutants and CO2 conversion
Publication -
Organic Rankine cycle turbogenerator cooling – Optimization of the generator water jacket heat exchange surface
Publication -
Small signal admittance spectroscopy applied for extraction of charge carrier mobility in thin organic layers
PublicationPraca przedstawia nowy sposób wyznaczania ruchliwości nośników ładunku w cienkich warstwach organicznych w oparciu o pomiary widm małosygnałowej admitancji.
-
The role of colloidal and particulate organic compounds in idenitrification and EBPR occurring in a full-scale activatedsludge system
PublicationThe aim of this study was to determine the immediate effects of slowly biodegradable substrates on the denitrification capability andphosphate release/uptake interactions for a full-scale biomass process from the ''Wschod'' wastewater treatment plant (WWTP) in Gdansk (Poland). Since it is hard to distinguish the slowlybiodegradable substrate in a direct way, a novel procedure based on batch experiments was developed and implemented....
-
Determination of Volatile Organic Compounds in indoor air in the Gdansk area using permeation passive samplers.
PublicationDozymetria pasywna, znana od wielu lat, jest użytecznym narzędziem w monitoringu poziomu zanieczyszczeń. Do określenia jakości powietrza wewnętrznego w 22 pomieszczeniach mieszkalnych, zlakoalizowanych na terenie Gdańska, wykorzystano dozymetry pasywne typu permeacyjnego na etapie pobierania próbek analitów. Uzyskane wyniki porównano z wynikami uzyskanymi przy wykorzystaniu matedy dynamicznej. Podjęto również próbę identyfikacji...
-
Effect of housing geometry on the performance of Chemcatcher passive sampler for the monitoring of hydrophobic organic pollutants in water
PublicationZaprojektowano nową obudowę próbnika typu Chemcatcher, tzw. próbnik typu Chemcatcher drugiej generacji. Większość badań kalibracyjnych przeprowadzono stosując próbnik typu Chemcatcher pierwszej generacji. Dlatego zbadano wpływ obudowy próbnika typu Chemcatcher na jego działanie.
-
Sample preparation for gas chromatographic determination of halogenated volatile organic compounds in environmental and biological samples
PublicationPodstawowym elementem przygotowania próbek środowiskowych i biologicznych do analizy jest etap izolacji i/lub wzbogacania polegający na przeniesieniu analitów z matrycy pierwotnej charakteryzującej się złożonym i często zmiennym składem (próbka oryginalna) do matrycy wtórnej z równoczesnym usunięciem substancji przeszkadzających (izolacja)i zwiększeniem stężenia analitów do poziomu powyżej granicy oznaczalności stosowanego przyrządu...
-
Evidence for electric field dependent dissociation of exciplexes in electron donor-acceptor organic solid films
PublicationBadano wpływ zewnętrznego pola elektrycznego na zanik luminescencji w układzie dendrymer aminowy m-MTDATA:fenantrolina BPT:poliwęglan PC oraz domieszkowanym organicznym kompleksem platyny. Zaobserwowano silne wygaszenie luminescencji na skutek dysocjacji ekscypleksów singletowych i trypletowych. Pole elektryczne obniżało zarówno amplitudę, jak i czas życia luminescencji.
-
Electric field effect on luminescence, and photoconduction in electron donor - electron acceptor organic solid films
PublicationZaobserwowano silne wygaszenie fotoluminescencji (80%) i duże fotoprądy (1mA/cm2) w układzie dendrymer aminowy m-MTDATA (donor elektronu) : pochodna fenantroliny BPT (akceptor elektronu) niedomieszkowanym oraz zawierającym domieszkę w postaci organicznego kompleksu platyny PtL2Cl. W interpretacji wyników uwzględniono elektrycznopolową dysocjację singletowych ekscypleksów m-MTDATA:BPT i trypletowych ekscypleksów m-MTDATA : PtL2Cl...
-
Excimer-based red-infrared organic light emitting diodes with very high quantum efficiency
PublicationW pracy opisano konstrukcję wydajnej organicznej ekscymerowej diody EL emitującej światło czerwone i podczerwone z wykorzystaniem organicznego kompleksu platyny.
-
The effect of morphology and crystalline structure of Mo/MoO3 layers on photocatalytic degradation of water organic pollutants
PublicationMolybdenum oxide layers were formed by anodization of the Mo metallic foil in a water/ethylene glycol-based electrolyte containing fluoride ions. The as-prepared, amorphous samples were annealed in air at different temperatures in a range from 100 �C to 700 �C. The crystal phase and morphology of anodized and annealed MoO3 layers were investigated using X-ray diffraction, Raman spectroscopy, and scanning electron microscopy. The...
-
Bio-mitigation of organic pollutants using horseradish peroxidase as a promising biocatalytic platform for environmental sustainability
PublicationA wide array of environmental pollutants is often generated and released into the ecosystem from industrial and human activities. Antibiotics, phenolic compounds, hydroquinone, industrial dyes, and Endocrine-Disrupting Chemicals (EDCs) are prevalent pollutants in water matrices. To promote environmental sustainability and minimize the impact of these pollutants, it is essential to eliminate such contaminants. Although there are...
-
Ag modified ZnO microsphere synthesis for efficient sonophotocatalytic degradation of organic pollutants and CO2 conversion
PublicationThe synthesis and design of non-precious and efficient sonophotocatalyts by an environment friendly technique are requisites for solar energy conversion and environmental remediation. This work reports the preparation of Ag/ZnO microspheres with different Ag contents through deposition–precipitation method for pollutant degradation and CO2 conversion. Detail structural investigation reveals that ZnO microspheres and Ag-ZnO microspheres...
-
Oznaczanie śladowych ilości związków organicznych w próbkach o złożonych matrycach zgodne z regułami ''zielonej chemii analitycznej''. Krótkołańcuchowe kwasy karboksylowe = Increasingly green approaches to the determination of selected trace organic in complex matrices. Short chain carboxylic acids
PublicationNowadays the great stress is put on environment protection and the activities to minimize the effect of chemical analyses on the environment are discussed. When environmentally friendly methodologies of analytes determination are applied the term "green analytical chemistry" is used. In general, the determination of organic compounds in complex matrices, which is a frequent analytical task, requires separation of sample components...
-
Adsorptive Removal of Aqueous Phase Crystal Violet Dye by Low-Cost Activated Carbon Obtained from Date Palm (L.) Dead Leaflets
PublicationUp to now, water pollution is still one of the important issues and challenges worldwide, due to its environmental, economic and human life impacts. It is also remains a challenge to environment scientists and technologists. Nowadays, the textile dyeing industry is considered one of the largest water consuming industries and produces large volumes of colored wastewater in its dyeing and finishing process. In this study, date palm...
-
Application of headspace-solid phase microextraction followed by gas chromatography-mass spectrometry to determine short-chain alkane monocarboxylic acids in aqueous samples
PublicationCelem prowadzonych badań było opracowanie metodyki oznaczania krótkołańcuchowych kwasów alkanomonokarboksylowych (KKA), opartej na ich izolowaniu i wzbogacaniu za pomocą techniki HS-SPME, a następnie oznaczaniu za pomocą chromatografii gazowej sprzężonej ze spektrometrią mas (GC-MS). Do ekstrakcji zastosowano włókno pokryte polarną fazą stacjonarną opartą na glikolu polietylenowym (PEG). Dla celów porównawczych zastosowano również...
-
Enhanced removal of hexavalent chromium from aqueous media using a highly stable and magnetically separable rosin-biochar-coated TiO2@C nanocomposite
Publication -
Adsorptive Capacity of Calcinated Hen Eggshell Blended with Silica Gel for Removal of Lead II Ions from Aqueous Media: Kinetics and Equilibrium Studies
Publication -
Golden artefacts, resin figurines, body adhesives and tomb sediments from the pre-Columbian burial site El Caño (Gran Coclé, Panamá): tracing organic contents using molecular archaeometry
PublicationThis research aimed to determine the origin of organic residues from funerary contexts in the El Ca~no settlement (Gran Cocl�e area, Panam�a, Central America) by means of multiple molecular probing techniques (GC-MS of organic solvent extracts and pyrolysis-GC-MS, THM-GC-MS and FTIR of solid samples). The samples include particles of precious resin figurines, fillings of golden objects, tomb sediments, plant exudates from extant...
-
Second harmonic generation on crystalline organic nanoclusters under extreme nanoconfinement in functionalized silica–benzil composites
Publication -
The feasibility of growing highbush blueberry (V. corymbosum L.) on loamy calcic soil with the use of organic substrates
Publication -
Electromodulation of fluorescence in hole-transporting materials for organic light-emitting diodes. Part II: Straburst amines
PublicationPraca jest kontynuacją artykułu, który został opublikowany wChem. Phys. vol. 256 (2000) s. 351-362. Zaobserwowano silne wygaszenie fluorescencji w dendrymerach aminowych zbudowanych na bazie trifenyloaminy. Efekt ten został przypisany rozpadowi stanów emitujących światło pod działaniem silnego pola elektrycznego.
-
The role of slowly biodegradable organic compounds in a full-scale biological nutrient removal activated sludge systems
PublicationThe aim of this study was to determine the immediate effects of slowly biodegradable substrates on the denitrification capability and phosphate release/uptake interactions for a full-scale biomass process from two large wastewater treatment plants (WWTPs) located in the cities of Gdansk and Gdynia (northern Poland). Since it is hard to distinguish the slowly biodegradable substrate in a direct way, a novel procedure based on batch...
-
Comparison of Chemical Composition and Colour Parameters of Different Mentha Genus Plants Grown under Organic Conditions
Publication -
An Assessment of RASSCF and TDDFT Energies and Gradients on an Organic Donor−Acceptor Dye Assisted by Resonance Raman Spectroscopy
PublicationThe excitation energies and gradients in the ground and the first excited state of a novel donor−(π- bridge)−acceptor 4-methoxy-1,3-thiazole-based chromophore were investigated by means of MS-RASPT2/RASSCF and TDDFT in solution. Within both methods, the excitation energies strongly depend on the employed equilibrium structures, whose differences can be rationalized in terms of bond length alternation indexes. It is shown that functionals with...
-
Correction: Highly stable organic–inorganic junction composed of hydrogenated titania nanotubes infiltrated by a conducting polymer
Publication -
Retention time and peak width in the combined pH/organic modifier gradient high performance liquid chromatography
Publication -
Soil organic carbon, macro- and micronutrient changes in soil fractions with different lability in response to crop intensification
Publication -
Mono- and bi-metallic plasmonic photocatalysts for degradation of organic compounds under UV and visible light irradiation
PublicationTitania powders were surface modified with gold and/or silver nanoparticles (NPs) by photodeposition method. Gold modified titania exhibited much higher photocatalytic activity during methanol dehydrogenation under UV irradiation than titania modified with monometallic silver and bimetallic Au–Ag NPs. Bimetallic photocatalysts exhibited either enhanced or reduced visible light activity, depending on properties of noble metal NPs,...
-
The application of isotopically labeled analogues for the determination of small organic compounds by GC/MS with selected ion monitoring
Publication -
Identification of organic acids as potential biomarkers in the urine of autistic children using gas chromatography/mass spectrometry
Publication -
Citropin 1.1 Trifluoroacetate to Chloride Counter-Ion Exchange in HCl-Saturated Organic Solutions: An Alternative Approach
Publication -
Binding of anionic Pt(ii) complexes in a dedicated organic matrix: towards new binary crystalline composites
Publication -
Synergistic Catalysis of Co(OH)2/CuO for the Degradation of Organic Pollutant Under Visible Light Irradiation
Publication -
Effect of buffer layers on performance of organic photovoltaic devices based on copper phthalocyanine-perylene dye heterojunction
PublicationPraca przedstawia wyniki badań układu fotowoltaicznego złożonego z cienkich warstw organicznych tworzących złącze (CuPc i MePTCDI), elektrod (ITO i Ag) oraz z warstw buforowych (MoO3 przy ITO i BCP przy Ag).
-
Design analysis of turbines for co-generating micro-power plant working in accordance with organic Rankine's cycle
PublicationPrzedstawiono wyniki analizy projektowej turbin dla mikrosiłowni kogeneracyjnej pracującej według organicznego obiegu Rankine'a z wykorzystaniem biopaliwa. Rozważono zakres mocy cieplnej od 25kW do 100kW, któremu odpowiadała możliwa do uzyskania moc elektryczna od 2kW do 12kW. Przeanalizowano projekty turbin osiowych (jedno- i wielostopniowych, także z częściowym zasilaniem), turbin promieniowych i promieniowo-osiowych. Porównano...