Results 21 to 30 of about 222,823 (148)

Thermodynamic, Chemical and Electrochemical Investigations of Calixarene Derivatives as Corrosion Inhibitor for Mild Steel in Hydrochloric Acid Solution

International Journal of Electrochemical Science, 2012
The focus of this study is to synthesize new calixarene derivatives namely calix[8]arenes (3a) (P1) and (2a) (P2), and to test its performance as corrosion inhibitor of steel in molar HCl at 308K. Polarization and weight loss measurements were used.
M. Kaddouri, M. Bouklah, S. Rekkab, R. Touzani, S.S. Al-Deyab, B. Hammouti, A. Aouniti, Z. Kabouche   +7 more
doaj   +1 more source

Mixed Order Fractional Differential Equations

Mathematics, 2017
This paper studies fractional differential equations (FDEs) with mixed fractional derivatives. Existence, uniqueness, stability, and asymptotic results are derived.
Michal Fečkan, JinRong Wang
doaj   +1 more source

Approaches to new derivatives of cellulose as designed pharmaceutical excipients [PDF]

Hemijska Industrija, 2003
Recently, our group initiated a synthetic program directed at new derivatives of cellulose intended as novel pharmaceutical excipients. With several notable exceptions, the attempted regioselective introduction of chemical functionality into natural ...
Schwarz Brigitte, Loppert Renate, Praznik Werner, Unger Frank Michael, Kahlig Hanspeter, Viernstein Helmut   +5 more
doaj   +1 more source

On the problem with generalized operators of fractional differentiation for mixed type equation with two degeneracy lines

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2013
The nonlocal problem for mixed-type equation with perpendicular lines of degeneracy is investigated for the case when the Dirichlet condition is given on the elliptic boundary, and the generalized derivatives of the solution values on the characteristics
Oleg Aleksandrovich Repin, Svetlana Kanshubievna Kumykova   +1 more
doaj   +1 more source

Comment on “Conservation Laws of Two (2 + 1)-Dimensional Nonlinear Evolution Equations with Higher-Order Mixed Derivatives”

Abstract and Applied Analysis, 2014
In a recent paper (Zhang (2013)), the author claims that he has proposed two rules to modify Ibragimov’s theorem on conservation laws to “ensure the theorem can be applied to nonlinear evolution equations with any mixed derivatives.” In this letter, we ...
Long Wei, Yang Wang
doaj   +1 more source

Inhibition behaviour of mild steel by three new benzaldehyde thiosemicarbazone derivatives in 0.5 M H2SO4: experimental and computational study [PDF]

Royal Society Open Science, 2019
Three new benzaldehyde thiosemicarbazone derivatives namely benzaldehyde thiosemicarbazone (BST), 4-carboxyl benzaldehyde thiosemicarbazone (PBST) and 2-carboxyl benzaldehyde thiosemicarbazone (OCT) were synthesized and their inhibition effects on mild ...
H. H. Zhang, C. K. Qin, Y. Chen, Z. Zhang   +3 more
doaj   +1 more source

Three-Color White Photoluminescence Emission Using Perovskite Nanoplatelets and Organic Emitter

Molecules, 2022
Three organic blue-light-emitting tetraphenylethylene (TPE) derivatives that exhibit aggregation-induced emission (AIE) were used as additives in the preparation of inorganic perovskite-structured green-light-emitting materials for three-color white ...
Hyukmin Kwon, Sunwoo Park, Seokwoo Kang, Hayoon Lee, Jongwook Park   +4 more
doaj   +1 more source

Nonlinear mixed Jordan-type derivations on *-algebras

Georgian Mathematical Journal
Abstract Let 𝒜 {\mathcal{A}} be a unital
Nadeem Ur Rehman, Md Arshad Madni, Muzibur Rahman Mozumder   +2 more
openaire   +1 more source

Climatologies of subtropical mixing derived from 3D models [PDF]

Atmospheric Chemistry and Physics, 2003
Abstract. Fingerlike structures reaching from lower into extra-tropical latitudes significantly contribute to the tropical-extratropical exchange of air masses. This is also an exchange of upper tropospheric and stratospheric air. Those so called streamers can, on a horizontal plane, be detected in N2O or O3 since they are characterised by high N2O or ...
Eyring, V., Dameris, M., Grewe, V., Langbein, I., Kouker, W.   +4 more
openaire   +5 more sources

A New Mixed Fractional Derivative with Applications in Computational Biology

Computation
This study develops a new definition of a fractional derivative that mixes the definitions of fractional derivatives with singular and non-singular kernels.
Khalid Hattaf
doaj   +1 more source