Results 11 to 20 of about 368,128 (266)

Novel membranes based on cellulose for gas separation and green method for their preparing

open access: yesЖурнал Белорусского государственного университета: Химия, 2019
A «green» method of obtaining gas separation composite membranes from cellulose solutions and its mixtures with chitosan in orthophosphoric acid is proposed for industrial use, and differs from the viscose method of producing cellophane and other known ...
Valeryia B. Filistovich   +6 more
doaj   +1 more source

Structure and Properties of High and Low Free Volume Polymers Studied by Molecular Dynamics Simulation

open access: yesComputation, 2019
Using molecular dynamics, a comparative study was performed of two pairs of glassy polymers, low permeability polyetherimides (PEIs) and highly permeable Si-containing polytricyclononenes.
Mikhail Mazo   +4 more
doaj   +1 more source

Exploring the role of conceptual scaffolding in solving synthesis problems

open access: yesPhysical Review Special Topics. Physics Education Research, 2011
It is well documented that when solving problems experts first search for underlying concepts while students tend to look for equations and previously worked examples.
Lin Ding1,*   +3 more
doaj   +2 more sources

Problems Synthesis representation through Activity Inquiry-Link Maps for Analyzing the Thermodynamics Conceptual Change

open access: yesJurnal Pendidikan Sains, 2015
Representasi Synthesis Problems melalui Aktivitas Inquiry-Link Maps untuk Menganalisis Perubahan Konseptual Termodinamika Abstract: The objective of this study is to analyze students’s conceptual change after learning activity by inquiry-link maps model.
Anis Fahrurotul Futihat
doaj   +1 more source

Sequential and simultaneous synthesis problem solving: A comparison of students’ gaze transitions

open access: yesPhysical Review Physics Education Research, 2021
This study examines students’ visual behaviors when they tackle two types of synthesis problems, sequential and simultaneous problems. Sequential synthesis tasks can be solved by applying pertinent concepts consecutively, whereas simultaneous synthesis ...
Bashirah Ibrahim, Lin Ding
doaj   +1 more source

Influence of the Number of Axial Bexarotene Ligands on the Cytotoxicity of Pt(IV) Analogs of Oxaliplatin

open access: yesBioinorganic Chemistry and Applications, 2017
We present the synthesis and cytotoxic potencies of new Pt(IV) complexes with bexarotene, an anticancer drug that induces cell differentiation and apoptosis via selective activation of retinoid X receptors.
Yulia N. Nosova   +12 more
doaj   +1 more source

On a Local Darlington Synthesis Problem [PDF]

open access: yesComplex Analysis and Operator Theory, 2017
The Darlington synthesis problem (in the scalar case) is the problem of embedding a given contractive analytic function to an inner $2\times 2$ matrix function as the entry. A fundamental result of Arov--Douglas--Helton relates this algebraic property to a pure analytic one known as a pseudocontinuation of bounded type.
openaire   +2 more sources

Induction in component-based software synthesis

open access: yesLietuvos Matematikos Rinkinys, 2023
The automatic programming and automatic software synthesis systems are relevant software engineering research objects. This article presents the prospects of induction as a component-based software synthesis method.
Vaidas Giedrimas
doaj   +3 more sources

Indigenous antecedents: theorical-methodological problems in syntheses about regional pre-history.

open access: yesRevista do Museu de Arqueologia e Etnologia, 1998
A synthesis of regional pre-history must be established starting from archaeological information organized in a space-time framework. Not only the data obtained from the analysis of material traces present at the sites should receive attention, but also ...
Arno Alvarez Kern
doaj   +1 more source

The Church Synthesis Problem with Parameters [PDF]

open access: yesLogical Methods in Computer Science, 2007
For a two-variable formula ψ(X,Y) of Monadic Logic of Order (MLO) the Church Synthesis Problem concerns the existence and construction of an operator Y=F(X) such that ψ(X,F(X)) is universally valid over Nat. B\"{u}chi and Landweber proved that the Church synthesis problem is decidable; moreover, they showed that if there is an ...
openaire   +5 more sources

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