Search results for: NON-NEWTONIAN LIQUIDS

Silica aerogel (SiO2ag) was combined with carbonaceous material in the pyrolysis process of hydrocarbons. The obtained nanocomposite SiO2ag/C was amorphous, partially preserving the porous structure of SiO2ag. The specific surface area changes from 445.6 m2/g for pure SiO2ag to 205.52 m2/g SiO2ag/C. The 29Si MAS-NMR shows a three-dimensional matrix with silicon atoms connected to other silicon atoms by four...

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Effect of culinary treatment on chnages in the contents of selected nutrients and non-nutrients in curly kale (Brassica oleracea var. acephala)

Publication

J. Kapusta-Duch
B. Kusznierewicz
T. Leszczyńska
B. Borczak

- JOURNAL OF FOOD PROCESSING AND PRESERVATION - Year 2016

Kale has a great nutritive value, very high antioxidant activity and pro-healthypotential. The level of phytochemicals and related bioactive compounds arestrongly dependent on pre and postharvest stages of production chain (domestic orindustrial). The study investigated changes in the levels of vitamin C, b-carotene,total polyphenols, antioxidant activity, degradation products of glucosinolates aswell as nitrates and nitrites in...

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A model of damaged media used for describing the process of non-stationary creep and long-term strength of polycrystalline structural alloys

Publication

L. A. Igumnov
I. Volkov
E. Boev
V. Eremeev

- CONTINUUM MECHANICS AND THERMODYNAMICS - Year 2022

The main laws of the processes of creep and long-term strength of polycrystalline structural alloys are considered. From the viewpoint of continuum damaged media (CDM), a mathematical model is developed that describes the processes of viscoplastic deformation and damage accumulation under creep. The problem of determining material parameters and scalar functions of the developed constitutive relations based on the results of specially...

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An adaptive approach to non-destructive evaluation (NDE) of cast irons containing precipitated graphite particles with the help of magnetoacoustic emission

Publication

L. Piotrowski
J. Sertucha

- NDT & E INTERNATIONAL - Year 2023

Physical properties of cast irons strongly depend on both their microstructure and the presence of casting defects. The paper analyses the possibility of application of magnetoacoustic emission (MAE) for nondestructive detection of flawed cast iron components. The investigated samples containing dross, chunky graphite and lamellar graphite were compared with the reference, flawless, spheroidal cast iron sample. The optimisation...

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Potassium trimethylsilanolate-mediated conversion of dialkyl phosphonates to their anhydrous potassium monoalkyl phosphonates under mild, non-aqueous conditions

Publication

- Year 2005

Przedstawiona została metoda syntezy bezwodnych soli potasowych fosfonianów monoalkilu z odpowiednich fosfonianów dialkilu w reakcji z trimetylosilanolanem potasu w bezwodnym eterze i chlorku metylenu. Metoda ta może być również stosowana dla makrocyklicznych kaliks[4]arenów z wbudowanymi grupami fosfonowymi na górnej obręczy; preferowanym rozpuszczalnikiem jest w tym przypadku bezwodny THF. Zaletą opisanej metody są łagodne warunki...

Simulations of spacing of localized zones in reinforced concrete beams using elastic-plasticity and damage mechanics with non-local softening

Publication

- Computers and Concrete - Year 2007

Artykuł omawia obliczanie belek żelbetowych z uwzględnieniem lokalizacji odkształceń. Obliczenia wykonano przy zastosowaniu MES na bazie sprężysto-plastycznego prawa konstytutywnego i modelu zniszczeniowego uwzględniającego degradację sztywności rozszerzonego o długość charakterystyczną mikrostruktury za pomocą teorii nielokalnej.

Modeling of patterns of shear zones during granular flow in silos using uncoupled ALE-formulation and non-local hypoplasticity

Publication

- Year 2009

W artykule przedstawiono wyniki numerycznej analizy lokalizacji odkształceń w materiałach granulowanych podczas przepływu w silosach. Obliczenia wykonano przy zastosowaniu metody elementów skończonych w podejściu ALE i mikropolarnego modelu hipoplastycznego. Pokazano wpływ szorstkości ścian silosu i zagęszczenia materiału sypkiego na typ lokalizacji.

Notched concrete beams under bending - calculations of size effects within stochastic elasto-plasticity with non-local softening

Publication

- ARCHIVES OF MECHANICS - Year 2009

W artykule przedstawiono wyniki numerycznej analizy efektów skali (efektu deterministycznego i stochastycznego) w belkach betonowych nacięciem poddanych zginaniu z uwzględnieniem lokalizacji odkształceń. Obliczenia wykonano przy zastosowaniu metody elementów skończonych i sprężysto-plastycznego modelu z nielokalnym osłabieniem. Pokazano wpływ wielkości belek na nośność z uwzględnieniem stochastycznego rozkładu wytrzymałości na...

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Computational simulations of concrete behaviour under dynamic conditions using elasto-visco-plastic model with non-local softening.

Publication

I. Marzec
J. Tejchman
A. Winnicki

- Computers and Concrete - Year 2015

W artykule przedstawiono wyniki obliczeniowych symulacji zachowania betonu w warunkach dynamicznych stosując sprężysto-lepko-plastyczny model z nielokalnym osłabieniem. Wykonano obliczenia dla ściskania jednoosiowego, rozciągania jednoosiowego i zginania. Dla dużych prędkości obciążenia uwzględniono fragmentację materiału. Wyniki porównano z doswiadczeniami.

Propagation of acoustic pulses in some fluids with yield stress

Publication

A. Perelomova

- CANADIAN JOURNAL OF PHYSICS - Year 2011

This study is devoted to the derivation of approximate equations governing acoustic pulses in flows with yieldstress, including some time-dependent flows with a slow dependence on time of yield stress and apparent viscosity. Themodeling of yield stress and apparent viscosity in the vicinity of a zero deformation rate allows us to consider a thixotropicfluid as a Bingham plastic with coefficients that are dependent on time. The...

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Topological Behaviour of Solutions of Vibro-Impact Systems in the Neighborhood of Grazing

Publication

S. Kryzhevich
M. Wiercigroch

- PHYSICA D-NONLINEAR PHENOMENA - Year 2012

The grazing bifurcation is considered for the Newtonian model of vibro-impact systems. A brief review on the conditions, sufficient for the existence of a grazing family of periodic solutions, is given. The properties of these periodic solutions are discussed. A plenty of results on the topological structure of attractors of vibro-impact systems is known. However, since the considered system is strongly nonlinear, these attractors...

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Computational analysis of power-law fluids for convective heat transfer in permeable enclosures using Darcy effects

Publication

- JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY - Year 2024

Natural convection is a complex environmental phenomenon that typically occurs in engineering settings in porous structures. Shear thinning or shear thickening fuids are characteristics of power-law fuids, which are non-Newtonian in nature and fnd wide-ranging uses in various industrial processes. Non-Newtonian fuid fow in porous media is a difcult problem with important consequences for energy systems and heat transfer. In this...

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Non-Kolbe electrolysis of N-protected-α-amino acids: a standardized method for the synthesis of N-protected (1-methoxyalkyl)amines

Publication

A. Walęcka-Kurczyk
J. Adamek
K. Walczak
M. Michalak
A. Październiok-Holewa
J. Adamek

- RSC Advances - Year 2022

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Non-invasive hemodynamic monitoring as a guide to drug treatment of uncontrolled hypertensive patients: effects on home blood pressure in the BEAUTY study

Publication

A. Talvik
P. Rebora
M. Heinpalu-Kuum
S. Salerno
E. Miszkowska-Nagórna
X. Liu
T. Comotti
E. Świerblewska
M. Valsecchi
F. Fadl... and 5 others

- BLOOD PRESSURE - Year 2018

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Thermal decomposition of some aromatic azomonoethers. Part II. Non-isothermal study of three liquid crystals in dynamic air atmosphere

Publication

A. Rotaru
A. Mietlarek-Kropidłowska
A. Moanta
P. Rotaru
E. Segal

- JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY - Year 2008

W ramach pracy zweryfikowano stabilność termiczną trzech barwników azowych o właściwościach ciekłokrystalicznych - potencjalnych prekursorów do otrzymywania warstw stosowanych w optyce nieliniowej. Zarejestrowano przebiegi TG, DTG, DTA oraz DSC jak również analizowano skład gazów powstających podczas rozpadu za pomocą przystawki FTIR. Przeprowadzono analizę kinetyki rozkładu, wyznaczając energię aktywacji procesu.

Toxic potencies of metabolite(s) of non-cylindrospermopsin producing Cylindrospermopsis raciborskii isolated from temperate zone in human white cells

Publication

B. Poniedziałek
P. Rzymski
M. Kokociński
J. Karczewski

- Chemosphere - Year 2015

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Particle rotation effects in Cosserat-Maxwell boundary layer flow with non-Fourier heat transfer using a new novel approach

Publication

M. B. Hafeez

- Year 2021

<title>Non-linear glasses and metaglasses for photonics, a review: Part II. Kerr nonlinearity and metaglasses of positive and negative refraction</title>

Publication

R. Romaniuk
R. S. Romaniuk

- Year 2007

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Genetic identification of a non-native species introgression into wild population of the field cricket Gryllus campestris (Orthoptera: Gryllidae) in Central Europe

Publication

H. PANAGIOTOPOULOU
M. BACA
K. BACA
P. SIENKIEWICZ
P. SLIPINSKI
M. Zmihorski

- EUROPEAN JOURNAL OF ENTOMOLOGY - Year 2016

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C-Reactive Protein and White Blood Cell Count in Non-Infective Acute Ischemic Stroke Patients Treated with Intravenous Thrombolysis

Publication

M. Wnuk
J. Derbisz
L. Drabik
A. Slowik

- Journal of Clinical Medicine - Year 2021

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Fasting Normoglycemia after Intravenous Thrombolysis Predicts Favorable Long-Term Outcome in Non-Diabetic Patients with Acute Ischemic Stroke

Publication

M. Wnuk
J. Derbisz
L. Drabik
M. Malecki
A. Slowik

- Journal of Clinical Medicine - Year 2021

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Optimization of a procedure for the simultaneous extraction of polycyclic aromatic hydrocarbons and metal ions by functionalized and non-functionalized carbon nanotubes as effective sorbents

Publication

M. Paszkiewicz
M. Caban
A. Bielicka-Giełdoń
P. Stepnowski

- Talanta - Year 2017

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Gemcitabine-Based Treatment in Poor Prognosis Patients with Relapsed and Refractory Hodgkin Lymphoma and Non-Hodgkin Lymphoma – a Multicenter Polish Experience

Publication

J. Rybka
W. Jurczak
A. Giza
E. Paszkiewicz-Kozik
B. Kumiega
J. Drozd-Sokołowska
A. Butrym
K. Kuliczkowski
T. Wróbel

- Advances in Clinical and Experimental Medicine - Year 2015

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Multiplex PCR assay for the simultaneous identification of race specific and non-specific leaf resistance genes in wheat (Triticum aestivum L.)

Publication

A. Noweiska
R. Bobrowska
J. Spychała
A. Tomkowiak
M. Kwiatek

- JOURNAL OF APPLIED GENETICS - Year 2023

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Cancer associated thrombosis: comparison of characteristics, treatment, and outcomes in oncological and non-oncological patients followed by Pulmonary Embolism Response Team

Publication

A. Pietrasik
A. Gąsecka
P. Kurzyna
J. Smyk
M. Wasilewski
R. Wolański
K. Wrona
S. Darocha
D. Zieliński
M. Grabowski... and 2 others

- Polish Archives of Internal Medicine - Year 2023

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Is sequential batch reactor an efficient technology to protect recipient against non-steroidal anti-inflammatory drugs and paracetamol in treated wastewater?

Publication

K. Kołecka
M. Gajewska
S. Cytawa
P. Stepnowski
M. Caban

- BIORESOURCE TECHNOLOGY - Year 2020

The tested facility was a wastewater treatment plant (WWTP) in Swarzewo, where the wastewater treatment takes place in aeration chambers with activated sludge using sequential batch reactors (SBRs). The concentration of the following pharmaceuticals: ibuprofen, paracetamol, flurbiprofen, naproxen, diclofenac, and its metabolites 5OH-diclofenac and 4OH-diclofenac was tested in influents and effluents. Simultaneously, the conventional...

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Amphotericin B derivatives: novel strategy for the development of non-toxic, broad spectrum, fungicidal and overcoming multidrug resistance antifungal agents.

Publication

- Year 2004

Zaprezentowano porównawczą charakterystykę działania amfoterycyny B (AmB) oraz jej pochodnych o różnym stopniu selektywnej toksyczności na szczepy grzybów reperezentujących różne mechanizmy oporności. Były to mutanty C. albicans posiadające defekt w szlaku biosyntezy ergosterolu oraz wielolekooporne szczepy S. cerevisiae wyposażone w pompy eksportujące typu ABC i MFS. Badania obejmowały: 1)porównanie aktywności przeciwgrzybowej...

FE calculations of a deterministic and statistical size effect in concrete under bending within stochastic elasto-plasticity and non-local softening

Publication

- ENGINEERING STRUCTURES - Year 2012

W artykule przedstawiony wyniki obliczeń MES deterministycznego i statystycznego efektu skali w belkach betonowych podczas zginania. Zastosowano model w ramach stochastycznej sprężysto-plastyczności i nielokalnego osłabienia. Belki były geometrycznie podobne. Wyniki porównano z modelem efektu skali Bazanta.

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FE-analysis of spacing of localized zones in reinforced concrete bars under tension using elasto-plasticity with non-local softening

Publication

- Archives of Civil Engineering - Year 2009

W artykule przedstawiono wyniki numerycznej analizy lokalizacji odkształceń w pręcie żelbetowym poddanym rozciąganiu. Obliczenia wykonano przy zastosowaniu metody elementów skończonych i sprężysto-plastycznego modelu z nielokalnym osłabieniem. Pokazano wpływ różnych parametrów na nośność pręta i rozstaw lokalizacji.

“Dilute & Shoot” approach for rapid determination of trace amounts of nicotine in zero-level e-liquids by reversed phase liquid chromatography and hydrophilic interactions liquid chromatography coupled with tandem mass spectrometry-electrospray ionization

Publication

P. Kubica
A. Kot-Wasik
A. Wasik
J. Namieśnik

- JOURNAL OF CHROMATOGRAPHY A - Year 2013

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Surface active fatty acid ILs: Influence of the hydrophobic tail and/or theimidazolium hydroxyl functionalization on aggregates formation

Publication

A. Mezzetta
J. Łuczak
J. Woch
C. Chiappe
J. Nowicki
L. Guazzelli

- JOURNAL OF MOLECULAR LIQUIDS - Year 2019

Nine structurally-related fatty acid ionic liquids have been prepared and their thermal behavior as well as their ability to self-assemble in water has been investigated. The thermal properties were studied by thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC), while the aggregation behavior was analyzed by tensiometry, isothermal titration calorimetry (ITC), conductometry, dynamic light scattering (DLS),...

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Betaine and L-carnitine ester bromides: Synthesis and comparative study of their thermal behaviour and surface activity

Publication

A. Mero
A. Mezzetta
J. Nowicki
J. Łuczak
L. Guazzelli

- JOURNAL OF MOLECULAR LIQUIDS - Year 2021

Six esters of both betaine and L-carnitine bromides, featuring alkyl groups ranging from C8 to C18 in length, have been synthesized. The thermal behaviour of these twelve bio-based salts has been analyzed and compared by thermal gravimetric analysis and differential scanning calorimetry. The L-carnitine alkyl ester bromides melted below 100 C and can hence be considered ionic liquids (ILs) with full rights. Conversely, the betaine...

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Efficiency of acoustic heating in the Maxwell fluid

Publication

- HYDROACOUSTICS - Year 2011

The nonlinear effects of sound in a fluid describing by the Maxwell model of the viscous stress tensor is the subject of investigation. Among other, viscoelastic biological media belong to this non-newtonian type of fluids. Generation of heating of the medium caused by nonlinear transfer of acoustic energy, is discussed in details. The governing equation of acoustic heating is derived by means of the special linear combination...

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Efficiency of acoustic heating in the Maxwell fluid

Publication

- HYDROACOUSTICS - Year 2011

The nonlinear effects of sound in a fluid describing by the Maxwell model of the viscous stress tensor is the subject of investigation. Among other, viscoelastic biological media belong to this non-newtonian type of fluids. Generation of heating of the medium caused by nonlinear transfer of acoustic energy, is discussed in details. The governing equation of acoustic heating is derived by means of the special linear combination...

Full text available to download