Filters
total: 2633
-
Catalog
- Publications 2070 available results
- Journals 123 available results
- Conferences 15 available results
- People 56 available results
- Inventions 13 available results
- Projects 11 available results
- Laboratories 1 available results
- Research Teams 6 available results
- Research Equipment 1 available results
- e-Learning Courses 78 available results
- Events 5 available results
- Open Research Data 254 available results
displaying 1000 best results Help
Search results for: SKŁADNIKI NATURALNE
-
Glycerol and Natural Deep Eutectic Solvents Extraction for Preparation of Luteolin-Rich Jasione montana Extracts with Cosmeceutical Activity
Publication -
Double-diffusive natural convection energy transfer in magnetically influenced Casson fluid flow in trapezoidal enclosure with fillets
PublicationThe prime motive of this disquisition is to deal with mathematical analysis of natural convection energy transport driven by combined buoyancy effects of thermal and solutal diffusion in a trapezoidal enclosure. Casson fluid rheological constitutive model depicting attributes of viscoelastic liquids is envisioned. The influence of the inclined magnetic field governed by Lorentz field law is also considered. To raise the essence...
-
Natural/bio-based sorbents as greener extractive materials for endocrine disrupting compounds in samples of different matrix composition
PublicationEndocrine-disrupting compounds (EDCs) are a group of chemicals that interfere with the endocrine system, leading to adverse effects on human health and the environment. Increasing concerns over the EDCs presence in various environmental compartments has driven the search for greener extraction materials. Recently, the use of polymers of natural origin (biopolymers) has been demonstrated to be an effective and promising research...
-
Weak localization competes with the quantum oscillations in a natural electronic superlattice: The case of Na1.5(PO2)4(WO3)20
PublicationWe report an investigation of the combined structural and electronic properties of the bronze Na1.5(PO2)4(WO3)20. Its low-dimensional structure and possible large reconstruction of the Fermi surface due to charge density wave instability make this bulk material a natural superlattice with a reduced number of carriers and Fermi energy. Signatures of multilayered two-dimensional (2D) electron weak localization are consequently reported,...
-
Latest Insights on Novel Deep Eutectic Solvents (DES) for Sustainable Extraction of Phenolic Compounds from Natural Sources
PublicationPhenolic compounds have long been of great importance in the pharmaceutical, food, and cosmetic industries. Unfortunately, conventional extraction procedures have a high cost and are time consuming, and the solvents used can represent a safety risk for operators, consumers, and the environment. Deep eutectic solvents (DESs) are green alternatives for extraction processes, given their low or non-toxicity, biodegradability, and reusability....
-
Polyurethanes modified with natural polymers for medical application. Part II. Polyurethane/gelatin, polyurethane/starch, polyurethane/cellulose
PublicationThis paper is a literature overview of biomedical PUR modifications with natural polymers such as starch, cellulose and gelatin. Properties like biodegradability and biocompatibility of modified PUR cause that these materials may be used as wound dressings, tissue scaffolds, tissue implants and also vascular grafts.
-
The estimation of total volatile organic compounds emissions generated from peroxide cured natural rubber/polycaprolactone blends
PublicationNatural rubber (NR)/polycaprolactone (PCL) blends at the ratio of 90/10% wt. (NR/PCL90/10) and 70/30% wt. (NR/PCL70/30), with a constant amount of dicumyl peroxide, were prepared by compounding in an internal mixer. Obtained NR/PCL bio-based blends were cured at three different temperatures (150 °C, 160 °C and 170 °C). The total content of volatile organic compounds (TVOC) as a function of the NR/PCL blends ratio, and their curing...
-
Infrared techniques for natural convection investigations in channels between two vertical, parallel, isothermal and symmetrically heated plates
PublicationThe effect of the gap width between two symmetrically heated vertical, parallel, isothermal plates on intensity of natural convective heat transfer in a gas (Pr = 0.71) was experimentally studied using the balance and gradient methods. In the former method heat fluxes were determined based on measurements of the voltage and electric current supplying the heaters placed inside the walls. In the latter, heat fluxes were calculated...
-
Antybiotyki aminoglikozydowe - problemy i wyzwania współczesnej analityki
PublicationZwiększające się zużycie produktów farmaceutycznych i ich przedostawanie się do środowiska naturalnego, jest jednym z istotnych problemów współczesnego świata. Legislacja dotycząca zawartości antybiotyków w środowisku naturalnym, żywności pochodzenia zwierzęcego, jak również w przypadku kontroli składu produktów farmaceutycznych ulega ciągłym zaostrzeniom. Stawia to przed analitykami coraz to nowe wyzwania polegające na opracowaniu...
-
Technologia Betonu 2022
e-Learning CoursesABC betonu, składniki, projektowanie, badania, wykonawstwo.
-
Technologia Betonu 2023 - sem.4
e-Learning CoursesABC betonu, składniki, projektowanie, badania, wykonawstwo.
-
Katarzyna Wojan dr hab.
PeopleDr habil., assiociate professor, Polish linguist, lexicographer, bibliographer; Finnish, Russian, Slavonic languages; confrontative linguistics, lexicology, lexicography, history of Polish lexicography, translation studies, intercultural communication, reception of Polish literature abroad, translations Editor-in-Chief of the Journal "Studia Rossica Gedanensia" (annual)
-
International Journal of Cognitive Informatics and Natural Intelligence
Journals -
Cosmos and History-The Journal of Natural and Social Philosophy
Journals -
Journal of Nantong University (Natural Science Edition)
Journals -
Chiang Mai University Journal of Natural Sciences
Journals -
Bulletin of the Kanagawa Prefectural Museum, Natural Science
Journals -
Annales Universitatis Paedagogicae Cracoviensis Studia Naturae
Journals -
Proceedings of the International Conference on Natural Hazards and Infrastructure
Journals -
New procedure of silica gel surface modification. Preparation of gaseousstandard mixtures for calibration purposes.
PublicationPrzedstawiono nową procedurę modyfikacji powierzchni żelu krzemionkowego z wykorzystaniem trimetyloaminy jako odczynnika. Próbki chemiczne modyfikowanego nośnika zostały wykorzystane do sporządzenia gazowych mieszanin wzorcowych (chlorek metylu jako składnik mierzony) techniką termicznego rozkładu związków powierzchniowych. Głównym celem badań było sprawdzenia przydatności nowej procedury modyfikacji powierzchni żelu do...
-
Enhanced Activity and Sustained Release of Protocatechuic Acid, a Natural Antibacterial Agent, from Hybrid Nanoformulations with Zinc Oxide Nanoparticles
Publication -
The influence of phosphorus fractions in bottom sediments on phosphate removal in semi-natural systems as the 3rd stage of biological wastewater treatment
PublicationThe research was carried out in two semi-natural systems (the polishing ponds in Swarzewo and the free water surface constructed wetland in Zarnowiec) in Poland. They were built as the 3rd stage of a conventional mechanical–biological wastewater treatment plant. These systems were built to improve the quality of the effluent of treated wastewater. In the polishing ponds and FWS wetland system, suspended solids, organic matter as...
-
Influence of a municipal waste landfill on the spatial distribution of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs/Fs) in the natural environment
Publication -
Investigating the Impact of Curing System on Structure-Property Relationship of Natural Rubber Modified with Brewery By-Product and Ground Tire Rubber
Publication -
Preparation and characterization of natural rubber composites highly filled with brewers' spent grain/ground tire rubber hybrid reinforcement
PublicationBrewers' spent grain (BSG) and ground tire rubber (GTR) were applied as low-cost hybrid reinforcement natural rubber (NR). The impact of BSG/GTR ratio (in range: 100/0, 75/25, 50/50, 25/75 and 0/100 phr) on processing and performance properties of highly filled natural rubber composites was evaluated by oscillating disc rheometer, Fourier-transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy,...
-
Structural and physico-mechanical properties of natural rubber/GTR composites devulcanized by microwaves: Influence of GTR source and irradiation time
PublicationGround tire rubber from car and truck was modified using microwave irradiation at variable time. The irradiated ground tire rubber was used as filler in composites based on natural rubber. The composites, with high content of ground tire rubber, were prepared using an internal batch mixer and subsequently cross-linked at 160℃. The influence of the ground tire rubber source (car/truck) and irradiation time on structure, physico-mechanical...
-
Thermally activated natural chalcopyrite for Fenton-like degradation of Rhodamine B: Catalyst characterization, performance evaluation, and catalytic mechanism
PublicationIn this work, catalytic activity of natural chalcopyrite (CuFeS2) was improved by thermal activation. The modified chalcopyrite was used as efficient catalyst for degradation of organic dye Rhodamine B (RhB) through advanced oxidation process (AOP). Effects of catalyst dosage, H2O2 concentration, reaction temperature, solution pH, anions, and natural organic matter on the degradation efficiency of RhB were investigated. This study...
-
Investigating the Impact of Curing System on Structure-Property Relationship of Natural Rubber Modified with Brewery By-Product and Ground Tire Rubber
PublicationThe application of wastes as a filler/reinforcement phase in polymers is a new strategy to modify the performance properties and reduce the price of biocomposites. The use of these fillers, coming from agricultural waste (cellulose/lignocellulose-based fillers) and waste rubbers, constitutes a method for the management of post-consumer waste. In this paper, highly-filled biocomposites based on natural rubber (NR) and ground tire...
-
Bio-Based Polyurethane Composites and Hybrid Composites Containing a New Type of Bio-Polyol and Addition of Natural and Synthetic Fibers
PublicationThis article describes how new bio-based polyol during the liquefaction process can be obtained. Selected polyol was tested in the production of polyurethane resins. Moreover, this research describes the process of manufacturing polyurethane materials and the impact of two different types of fibers—synthetic and natural (glass and sisal fibers)—on the properties of composites. The best properties were achieved at a reaction temperature...
-
Prediction of Ship Resonant Rolling - Related Dangerous Zones with Regard to the Equivalent Metacentric Height Governing Natural Frequency of Roll
PublicationPotentially dangerous zones corresponding to dynamical stability phenomena, possibly encountered by ships sailing in rough sea, are estimated nowadays with the use of the method recommended by IMO in the guidance coded MSC.1/Circ.1228. In this IMO method the parameter governing the natural period of roll is the initial metacentric height. Some earlier studies revealed that the initial metacentric height...
-
A Three-Step Approach to Estimation of Reduction Potentials of Natural Mixtures of Antioxidants Based on DPPH Test; Illustration for Catechins and Cocoa
PublicationThe aim of this study is to propose a methodology to assess electrochemical properties of complex mixtures of antioxidants, such as plant extracts, based on the results of simple and popular DPPH test. The first, most difficult step, involves determinations of standard reduction potentials (E0) for the series of purified compounds (here catechins). The next step is the calculation of stoichiometric values (n10) based on the results...
-
Nutritional value and sensory properties of common carp (Cyprinus carpio L.) fillets enriched with sustainable and natural feed ingredients
Publication -
Food components and their role in food quality
PublicationBiałka, lipidy, sacharydy, składniki mineralne, woda i inne składniki wpły-wają na właściwości sensoryczne, trwałość, wartość odżywczą i zdrowotnośćżywności. W czasie przechowywania żywności i wskutek obróbki składniki ule-gają korzystnym i niepożądanym zmianom pod wpływem działania enzymów i czyn-ników środowiska.
-
Naturalne Metody Oczyszczania Ścieków
e-Learning Courses -
Naturalne Metody Oczyszczania Ścieków
e-Learning Courses -
Naturalne Metody Oczyszczania Ścieków
e-Learning Courses -
Model statystycznej optymalizacji składu przemysłowych preparatów myjących na bazie surowców pochodzenia naturalnego z wykorzystaniem metody planowanego eksperymentu (DOE)
Publication -
Automatyczna budowa taksonomii usług w oparciu o ich głosy w języku naturalnym oraz przy uzyciu zewnętrznych źródeł wiedzy
PublicationPrzedstawiono propozycję metody automatycznej budowy taksonomiiusług na podstawie ich opisów w języku naturalnym, w oparciu ometodę analizy formalnych koncepcji (FCA). Dodatkowo przedstawione rozwiązanie przewiduje możliwość skorzystania z zewnętrznych źródeł wiedzy takich jak Wikipedia, Word Net, ConceptNet lub globalnej sieci WWW w celu eliminacji problemu niepełnych danych wejściowych (ang. data sparseness).
-
Wstęp do technologii betonu 2023-24
e-Learning CoursesCo to jest beton: składniki, właściwości, projektowanie, wykonywanie i badania.
-
Funkcjonalne i Bioaktywne Składniki Żywności 2022
e-Learning CoursesKurs jest uzupełnieniem treści przedmiotu Funkcjonalne i Bioaktywne Składniki Żywności, który realizowany jest w formie wykładów, ćwiczeń laboratoryjnych i seminariów na semestrze letnim 2022 i dedykowany jest dla Studentów II stopnia sem. 1 kierunku Biotechnologia na Wydziale Chemicznym
-
A New Method for Automatic Generation of Animated Motion
PublicationA new method for generation of animation with a quality comparable to a natural motion is presented. Proposed algorithm is based on fuzzy description of motion parameters and subjective features. It is assumed that such processing increases naturalness and quality of motion, which is verified by subjective evaluation tests. First, reference motion data are gathered utilizing a motion capture system, then these data are reduced...
-
Non-linear circuit model of a single doubly-fed induction machine formulated in natural axes for drive systems simulation purposes
PublicationMathematical modelling and a circuit model formulated in natural axes of a single doubly-fed induction machine, with the account of magnetic circuit nonlinearity are presented in the paper. Derivation of the model differential equations was based on Lagrange's energy method. State functions of magnetic elements in the model are non-linear and depend on all currents flowing in the machine windings and on the angle of rotor position....
-
Geographical information system for analysis of critical infrastructures and their hazards due to terrorism, man-originated catastrophes and natural disasters for the city of gdansk.
PublicationArtykuł prezentuje System Informacji Przestrzennej dla oceny i wizualizacji Infrastruktur Krytycznych i ich zagrożeń, stworzony przez Katedrę Systemów Geoinformatycznych dla Miasta Gdańska. System pozwala na przestrzenną analizę i mapowanie wyników przetwarzania danych dotyczących Infrastruktur Krytycznych pochodzących m.in. z modułu CARVER2.
-
Galerkin finite element analysis of Darcy–Brinkman–Forchheimer natural convective flow in conical annular enclosure with discrete heat sources
Publication -
Built Heritage, Sustainable Development, and Natural Hazards: Flood Protection and UNESCO World Heritage Site Protection Strategies in Krakow, Poland
Publication -
Obstetric and perinatal outcomes following programmed compared to natural frozen-thawed embryo transfer cycles: a systematic review and meta-analysis
Publication -
Probability of second live birth after first natural and medically assisted reproduction‐mediated live birth: A historical cohort study
Publication -
Structure and Stability Characterization of Natural Lake Pigments Made from Plant Extracts and Their Potential Application in Polymer Composites for Packaging Materials
PublicationNatural dyes were extracted from various plant sources and converted into lake pigments based on aluminum and tin. Three different plants (weld, Persian berries, and Brazilwood) were chosen as representative sources of natural dyes. High-performance liquid chromatography (HPLC) and triple-quadrupole mass spectrometry (QqQ MS) were used to identify dyestuffs in the raw extracts. The natural dyes and lake pigments were further characterized...
-
Natural fish oil improves the differentiation and maturation of oligodendrocyte precursor cells to oligodendrocytes in vitro after interaction with the blood–brain barrier
PublicationThe blood–brain barrier (BBB) tightly controls the microenvironment of the central nervous system (CNS) to allow neurons to function properly. Additionally, emerging studies point to the beneficial effect of natural oils affecting a wide variety of physiological and pathological processes in the human body. In this study, using an in vitro model of the BBB, we tested the influence of natural fish oil mixture (FOM) vs. borage oil...
-
Using creative approaches for discovering biomorphic forms for appropriate human habitation in natural environments. Case study of Kashubian Lake District
PublicationThe research process consisted of studies of natural and cultural conditions of the Kashubian Lake District This is an area of exceptional natural conditions. For centuries, it has seen human habitation with respect to landscape values. Given its extensive forest cover and the lack of heterogeneity of natural conditions, the area has become an interesting inspiration for the author’s original project. The project is aimed at searching...