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Article ; Online: The Prevention of Thalassemia Revisited: A Historical and Ethical Perspective by the Thalassemia International Federation.

Angastiniotis, Michael / Petrou, Mary / Loukopoulos, Dimitrios / Modell, Bernadette / Farmakis, Dimitrios / Englezos, Panos / Eleftheriou, Androulla

Hemoglobin

2021 Volume 45, Issue 1, Page(s) 5–12

Abstract: Hemoglobinopathies are the most common monogenic disorders in humans; among them, thalassemia constitutes a serious medical and public health problem in high prevalence regions, in a geographical zone ranging from the Mediterranean Basin to China. In ... ...

Abstract	Hemoglobinopathies are the most common monogenic disorders in humans; among them, thalassemia constitutes a serious medical and public health problem in high prevalence regions, in a geographical zone ranging from the Mediterranean Basin to China. In addition, migrations over the years have introduced thalassemia to many parts of the world. Although disease-specific programs are in place and accessible to most patients in prosperous countries, this is not the case in developing economies, where more than 75.0% of the patient population is born and lives; this concerns both prevention and treatment programs. In view of the significant improvements in public health and healthcare systems over the past few years, the Thalassemia International Federation has revisited the thalassemia prevention programs, initiatives and policies in some of its member countries, discussing their effectiveness and whether any changes in policy or public attitudes to thalassemia prevention have occurred through the recent years.
MeSH term(s)	China/epidemiology ; Female ; Hemoglobinopathies ; Humans ; Pregnancy ; Prenatal Diagnosis ; Prevalence ; Thalassemia/epidemiology ; Thalassemia/genetics ; Thalassemia/prevention & control
Language	English
Publishing date	2021-01-18
Publishing country	England
Document type	Journal Article
ZDB-ID	750615-6
ISSN	1532-432X ; 0363-0269
ISSN (online)	1532-432X
ISSN	0363-0269
DOI	10.1080/03630269.2021.1872612
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Article ; Online: Contact angle hysteresis of non-flattened-top micro/nanostructures.

Moradi, Sona / Englezos, Peter / Hatzikiriakos, Savvas G

Langmuir : the ACS journal of surfaces and colloids

2014 Volume 30, Issue 11, Page(s) 3274–3284

Abstract: A two-dimensional (2D) thermodynamic model is proposed to predict the contact angle (CA) and contact angle hysteresis (CAH) of different types of surface geometries, particularly those with asperities having nonflattened tops. The model is evaluated by ... ...

Abstract	A two-dimensional (2D) thermodynamic model is proposed to predict the contact angle (CA) and contact angle hysteresis (CAH) of different types of surface geometries, particularly those with asperities having nonflattened tops. The model is evaluated by micro/nano sinusoidal and parabolic patterns fabricated by laser ablation. These microstructures are analyzed thermodynamically through the use of the Gibbs free energy to obtain the equilibrium contact angle (CA) and contact angle hysteresis (CAH). The effects of the geometrical details of two types of microstructures on maximizing the superhydrophobicity of the nanopatterned surface are also discussed in an attempt to design surfaces with desired and/or optimum wetting characteristics. The analysis of the various surfaces reveals the important geometrical parameters that may lead to the lotus effect (high CA > 150° and low CAH < 10°) or petal effect (high CA > 150° and high CAH ≫ 10°).
Language	English
Publishing date	2014-03-25
Publishing country	United States
Document type	Journal Article
ZDB-ID	2005937-1
ISSN	1520-5827 ; 0743-7463
ISSN (online)	1520-5827
ISSN	0743-7463
DOI	10.1021/la500277n
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Article ; Online: Why ice-binding type I antifreeze protein acts as a gas hydrate crystal inhibitor.

Bagherzadeh, S Alireza / Alavi, Saman / Ripmeester, John A / Englezos, Peter

Physical chemistry chemical physics : PCCP

2015 Volume 17, Issue 15, Page(s) 9984–9990

Abstract: Antifreeze proteins (AFPs) prevent ice growth by binding to a specific ice plane. Some AFPs have been found to inhibit the formation of gas hydrates which are a serious safety and operational challenge for the oil and gas industry. Molecular dynamics ... ...

Abstract	Antifreeze proteins (AFPs) prevent ice growth by binding to a specific ice plane. Some AFPs have been found to inhibit the formation of gas hydrates which are a serious safety and operational challenge for the oil and gas industry. Molecular dynamics simulations are used to determine the mechanism of action of the winter flounder AFP (wf-AFP) in inhibiting methane hydrate growth. The wf-AFP adsorbs onto the methane hydrate surface via cooperative binding of a set of hydrophobic methyl pendant groups to the empty half-cages at the hydrate/water interface. Each binding set is composed of the methyl side chain of threonine and two alanine residues, four and seven places further down in the sequence of the protein. Understanding the principle of action of AFPs can lead to the rational design of green hydrate inhibitor molecules with potential superior performance.
MeSH term(s)	Amino Acid Sequence ; Antifreeze Proteins, Type I/chemistry ; Binding Sites ; Crystallization ; Gases/chemistry ; Hydrogen Bonding ; Hydrophobic and Hydrophilic Interactions ; Models, Molecular ; Molecular Dynamics Simulation ; Surface Properties ; Water/chemistry
Chemical Substances	Antifreeze Proteins, Type I ; Gases ; Water (059QF0KO0R)
Language	English
Publishing date	2015-04-21
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1476244-4
ISSN	1463-9084 ; 1463-9076
ISSN (online)	1463-9084
ISSN	1463-9076
DOI	10.1039/c4cp05003g
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Article ; Online: Formation of methane nano-bubbles during hydrate decomposition and their effect on hydrate growth.

Bagherzadeh, S Alireza / Alavi, Saman / Ripmeester, John / Englezos, Peter

The Journal of chemical physics

2015 Volume 142, Issue 21, Page(s) 214701

Abstract: Molecular dynamic simulations are performed to study the conditions for methane nano-bubble formation during methane hydrate dissociation in the presence of water and a methane gas reservoir. Hydrate dissociation leads to the quick release of methane ... ...

Abstract	Molecular dynamic simulations are performed to study the conditions for methane nano-bubble formation during methane hydrate dissociation in the presence of water and a methane gas reservoir. Hydrate dissociation leads to the quick release of methane into the liquid phase which can cause methane supersaturation. If the diffusion of methane molecules out of the liquid phase is not fast enough, the methane molecules agglomerate and form bubbles. Under the conditions of our simulations, the methane-rich quasi-spherical bubbles grow to become cylindrical with a radius of ∼11 Å. The nano-bubbles remain stable for about 35 ns until they are gradually and homogeneously dispersed in the liquid phase and finally enter the gas phase reservoirs initially set up in the simulation box. We determined that the minimum mole fraction for the dissolved methane in water to form nano-bubbles is 0.044, corresponding to about 30% of hydrate phase composition (0.148). The importance of nano-bubble formation to the mechanism of methane hydrate formation, growth, and dissociation is discussed.
Language	English
Publishing date	2015-06-07
Publishing country	United States
Document type	Journal Article
ZDB-ID	3113-6
ISSN	1089-7690 ; 0021-9606
ISSN (online)	1089-7690
ISSN	0021-9606
DOI	10.1063/1.4920971
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Article ; Online: Superhydrophobic lignocellulosic wood fiber/mineral networks.

Mirvakili, Mehr Negar / Hatzikiriakos, Savvas G / Englezos, Peter

ACS applied materials & interfaces

2013 Volume 5, Issue 18, Page(s) 9057–9066

Abstract: Lignocellulosic wood fibers and mineral fillers (calcium carbonate, talc, or clay) were used to prepare paper samples (handsheets), which were then subjected to a fluorocarbon plasma treatment. The plasma treatment was performed in two steps: first using ...

Abstract	Lignocellulosic wood fibers and mineral fillers (calcium carbonate, talc, or clay) were used to prepare paper samples (handsheets), which were then subjected to a fluorocarbon plasma treatment. The plasma treatment was performed in two steps: first using oxygen plasma to create nanoscale roughness on the surface of the handsheet, and second fluorocarbon deposition plasma to add a layer of low surface energy material. The wetting behavior of the resulting fiber/mineral network (handsheet) was determined. It was found the samples that were subjected to oxygen plasma etching prior to fluorocarbon deposition exhibit superhydrophobicity with low contact angle hysteresis. On the other hand, those that were only treated by fluorocarbon plasma resulted in "sticky" hydrophobicity behavior. Moreover, as the mineral content in the handsheet increases, the hydrophobicity after plasma treatment decreases. Finally, it was found that although the plasma-treated handsheets show excellent water repellency they are not good water vapor barriers.
Language	English
Publishing date	2013-09-25
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1944-8252
ISSN (online)	1944-8252
DOI	10.1021/am402286x
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Article ; Online: Enhanced Barrier Performance of Engineered Paper by Atomic Layer Deposited Al2O3 Thin Films.

Mirvakili, Mehr Negar / Van Bui, Hao / van Ommen, J Ruud / Hatzikiriakos, Savvas G / Englezos, Peter

ACS applied materials & interfaces

2016 Volume 8, Issue 21, Page(s) 13590–13600

Abstract: Surface modification of cellulosic paper is demonstrated by employing plasma assisted atomic layer deposition. Al2O3 thin films are deposited on paper substrates, prepared with different fiber sizes, to improve their barrier properties. Thus, a ... ...

Abstract	Surface modification of cellulosic paper is demonstrated by employing plasma assisted atomic layer deposition. Al2O3 thin films are deposited on paper substrates, prepared with different fiber sizes, to improve their barrier properties. Thus, a hydrophobic paper is created with low gas permeability by combining the control of fiber size (and structure) with atomic layer deposition of Al2O3 films. Papers are prepared using Kraft softwood pulp and thermomechanical pulp. The cellulosic wood fibers are refined to obtain fibers with smaller length and diameter. Films of Al2O3, 10, 25, and 45 nm in thickness, are deposited on the paper surface. The work demonstrates that coating of papers prepared with long fibers efficiently reduces wettability with slight enhancement in gas permeability, whereas on shorter fibers, it results in significantly lower gas permeability. Wettability studies on Al2O3 deposited paper substrates have shown water wicking and absorption over time only in papers prepared with highly refined fibers. It is also shown that there is a certain fiber size at which the gas permeability assumes its minimum value, and further decrease in fiber size will reverse the effect on gas permeability.
Language	English
Publishing date	2016-06-01
Publishing country	United States
Document type	Journal Article
ISSN	1944-8252
ISSN (online)	1944-8252
DOI	10.1021/acsami.6b02292
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Article ; Online: Femtosecond laser irradiation of metallic surfaces: effects of laser parameters on superhydrophobicity.

Moradi, Sona / Kamal, Saeid / Englezos, Peter / Hatzikiriakos, Savvas G

Nanotechnology

2013 Volume 24, Issue 41, Page(s) 415302

Abstract: This work studies in detail the effect of femtosecond laser irradiation process parameters (fluence and scanning speed) on the hydrophobicity of the resulting micro/nano-patterned morphologies on stainless steel. Depending on the laser parameters, four ... ...

Abstract	This work studies in detail the effect of femtosecond laser irradiation process parameters (fluence and scanning speed) on the hydrophobicity of the resulting micro/nano-patterned morphologies on stainless steel. Depending on the laser parameters, four distinctly different nano-patterns were produced, namely nano-rippled, parabolic-pillared, elongated sinusoidal-pillared and triple roughness nano-structures. All of the produced structures were classified according to a newly defined parameter, the laser intensity factor (LIF); by increasing the LIF, the ablation rate and periodicity of the asperities increase. In order to decrease the surface energy, all of the surfaces were coated with a fluoroalkylsilane agent. Analysis of the wettability revealed enhanced superhydrophobicity for most of these structures, particularly those possessing the triple roughness pattern that also exhibited low contact angle hysteresis. The high permanent superhydrophobicity of this pattern is due to the special micro/nano-structure of the surface that facilitates the Cassie-Baxter state.
Language	English
Publishing date	2013-10-18
Publishing country	England
Document type	Journal Article
ZDB-ID	1362365-5
ISSN	1361-6528 ; 0957-4484
ISSN (online)	1361-6528
ISSN	0957-4484
DOI	10.1088/0957-4484/24/41/415302
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Article ; Online: High-Performance Supercapacitors from Niobium Nanowire Yarns.

Mirvakili, Seyed M / Mirvakili, Mehr Negar / Englezos, Peter / Madden, John D W / Hunter, Ian W

ACS applied materials & interfaces

2015 Volume 7, Issue 25, Page(s) 13882–13888

Abstract: The large-ion-accessible surface area of carbon nanotubes (CNTs) and graphene sheets formed as yarns, forests, and films enables miniature high-performance supercapacitors with power densities exceeding those of electrolytics while achieving energy ... ...

Abstract	The large-ion-accessible surface area of carbon nanotubes (CNTs) and graphene sheets formed as yarns, forests, and films enables miniature high-performance supercapacitors with power densities exceeding those of electrolytics while achieving energy densities equaling those of batteries. Capacitance and energy density can be enhanced by depositing highly pseudocapacitive materials such as conductive polymers on them. Yarns formed from carbon nanotubes are proposed for use in wearable supercapacitors. In this work, we show that high power, energy density, and capacitance in yarn form are not unique to carbon materials, and we introduce niobium nanowires as an alternative. These yarns show higher capacitance and energy per volume and are stronger and 100 times more conductive than similarly spun carbon multiwalled nanotube (MWNT) and graphene yarns. The long niobium nanowires, formed by repeated extrusion and drawing, achieve device volumetric peak power and energy densities of 55 MW·m(-3) (55 W·cm(-3)) and 25 MJ·m(-3) (7 mWh·cm(-3)), 2 and 5 times higher than that for state-of-the-art CNT yarns, respectively. The capacitance per volume of Nb nanowire yarn is lower than the 158 MF·m(-3) (158 F·cm(-3)) reported for carbon-based materials such as reduced graphene oxide (RGO) and CNT wet-spun yarns, but the peak power and energy densities are 200 and 2 times higher, respectively. Achieving high power in long yarns is made possible by the high conductivity of the metal, and achievement of high energy density is possible thanks to the high internal surface area. No additional metal backing is needed, unlike for CNT yarns and supercapacitors in general, saving substantial space. As the yarn is infiltrated with pseudocapacitive materials such as poly(3,4-ethylenedioxythiophene) (PEDOT), the energy density is further increased to 10 MJ·m(-3) (2.8 mWh·cm(-3)). Similar to CNT yarns, niobium nanowire yarns are highly flexible and show potential for weaving into textiles and use in wearable devices.
MeSH term(s)	Bridged Bicyclo Compounds, Heterocyclic/chemistry ; Cellulose/chemistry ; Electric Capacitance ; Electrical Equipment and Supplies ; Nanowires/chemistry ; Niobium/chemistry ; Polymers/chemistry
Chemical Substances	Bridged Bicyclo Compounds, Heterocyclic ; Polymers ; poly(3,4-ethylene dioxythiophene) ; Niobium (05175J654G) ; Cellulose (9004-34-6)
Language	English
Publishing date	2015-07-01
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1944-8252
ISSN (online)	1944-8252
DOI	10.1021/acsami.5b02327
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Article: Application of the NICA-Donnan approach to calculate equilibrium between proton and metal ions with lignocellulosic materials.

Li, Xiao-Sen / Englezos, Peter

Journal of colloid and interface science

2005 Volume 281, Issue 2, Page(s) 267–274

Abstract: The NICA (nonideal competitive adsorption)-Donnan model is employed to describe the interactions between Cu2+, Pb2+, Cd2+, Mn2+, and Fe3+ ions and the lignins extracted from wheat bran (lignocellulosic substrate, LS) and from kraft pulp (residual kraft ... ...

Abstract	The NICA (nonideal competitive adsorption)-Donnan model is employed to describe the interactions between Cu2+, Pb2+, Cd2+, Mn2+, and Fe3+ ions and the lignins extracted from wheat bran (lignocellulosic substrate, LS) and from kraft pulp (residual kraft lignin, RKL), and between Cu2+, Mn2+, and Fe3+ ions and wood fibers from kraft pulps. The charge of the LS and the fiber charge need to be obtained from potentiometric titration data for the LS, and by use of Donnan equilibrium, mass balance, and electroneutrality equations for the kraft fiber. The proton binding parameters for the LS and the kraft fiber, the total site densities (Qmax,1 and Qmax,2), the median protonation constants (K1 and K2), and nonideality-generic heterogeneity parameters (m1 and m2) (subscripts 1 and 2 refer to the carboxyl and phenolic functional groups) are obtained by fitting these charge data. With the above proton parameters, the interactions between metal ions and the lignins (LS and RKL)/kraft fibers are calculated, and the metal binding parameters are obtained. These parameters are the binding constants of metal i (K(i,1) and K(i,2)), ion-specific nonideality parameters (n(i,1) and n(i,2)), and intrinsic heterogeneity parameters (p1 and p2). p1 and p2 are the same for all metal ions binding to a specific sorbent. Here, p1 and p2 values obtained by fitting the binding data of a specific metal ion are used directly in binding calculations for other metal ions, and do not need to be fitted. By use of the above parameters for single metal ion binding, the binding relationship between a mixed metal ion and lignocellulosic substrate/kraft fiber can be predicted.
MeSH term(s)	Adsorption ; Binding, Competitive ; Cadmium/metabolism ; Cellulose/metabolism ; Copper/metabolism ; Ferric Compounds/metabolism ; Lead/metabolism ; Lignin/metabolism ; Manganese/metabolism ; Metals/metabolism ; Models, Chemical ; Protons ; Wood
Chemical Substances	Ferric Compounds ; Metals ; Protons ; Cadmium (00BH33GNGH) ; lignocellulose (11132-73-3) ; Lead (2P299V784P) ; Manganese (42Z2K6ZL8P) ; Copper (789U1901C5) ; Cellulose (9004-34-6) ; Lignin (9005-53-2)
Language	English
Publishing date	2005-01-15
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	241597-5
ISSN	1095-7103 ; 0021-9797
ISSN (online)	1095-7103
ISSN	0021-9797
DOI	10.1016/j.jcis.2004.08.141
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Article ; Online: Molecular modeling of the dissociation of methane hydrate in contact with a silica surface.

Bagherzadeh, S Alireza / Englezos, Peter / Alavi, Saman / Ripmeester, John A

The journal of physical chemistry. B

2012 Volume 116, Issue 10, Page(s) 3188–3197

Abstract: We use constant energy, constant volume (NVE) molecular dynamics simulations to study the dissociation of the fully occupied structure I methane hydrate in a confined geometry between two hydroxylated silica surfaces between 36 and 41 Å apart, at initial ...

Abstract	We use constant energy, constant volume (NVE) molecular dynamics simulations to study the dissociation of the fully occupied structure I methane hydrate in a confined geometry between two hydroxylated silica surfaces between 36 and 41 Å apart, at initial temperatures of 283, 293, and 303 K. Simulations of the two-phase hydrate/water system are performed in the presence of silica, with and without a 3 Å thick buffering water layer between the hydrate phase and silica surfaces. Faster decomposition is observed in the presence of silica, where the hydrate phase is prone to decomposition from four surfaces, as compared to only two sides in the case of the hydrate/water simulations. The existence of the water layer between the hydrate phase and the silica surface stabilizes the hydrate phase relative to the case where the hydrate is in direct contact with silica. Hydrates bound between the silica surfaces dissociate layer-by-layer in a shrinking core manner with a curved decomposition front which extends over a 5-8 Å thickness. Labeling water molecules shows that there is exchange of water molecules between the surrounding liquid and intact cages in the methane hydrate phase. In all cases, decomposition of the methane hydrate phase led to the formation of methane nanobubbles in the liquid water phase.
MeSH term(s)	Methane/chemistry ; Models, Molecular ; Molecular Dynamics Simulation ; Silicon Dioxide/chemistry ; Surface Properties ; Temperature ; Water/chemistry
Chemical Substances	Water (059QF0KO0R) ; Silicon Dioxide (7631-86-9) ; Methane (OP0UW79H66)
Language	English
Publishing date	2012-03-15
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	1520-5207
ISSN (online)	1520-5207
DOI	10.1021/jp2086544
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