نتایج جستجو برای: taft
تعداد نتایج: 465 فیلتر نتایج به سال:
Two complementary models of Lewis molecular acidity are introduced and tested in a wide series of 45 room temperature ionic liquids (RTIL). They are defined in the context of the conceptual density functional theory. The first one, which we tentatively call the excess electronic chemical potential, assesses the electron accepting power of the RTIL by relating the H-bond donor acidity with the c...
Author: Nishantha Randunu Pathirannehelage Title: Imaging through ground-level turbulence by Fourier telescopy: simulations and preliminary experiments Institution: Florida Atlantic University Dissertation Advisor: Dr. William T. Rhodes Degree: Doctor of Philosophy Year: 2015 Fourier telescopy imaging is a recently-developed imaging method that relies on active structured-light illumination of ...
Abstract. Villanueva ELC, Obeña RDR, Origenes MG, Buot IE Jr. 2022. Vegetation structure of forests over limestone and its influencing environmental factors in Samar Island Natural Park, Philippines. Biodiversitas 23: 6492-6512. National Park (SINP) limestone, a nominee to the UNESCO World Heritage List, needs comprehensive study vegetation as baseline for monitoring effective conservation. Thu...
Polarity studies in two classes of imidazolium-based protic ionic liquids (PILs) possessing [HSO(4)](-), [HCOO](-), [CH(3)COO](-) and [CH(3)CH(2)COO](-) anions were carried out using a solvatochromic method from 298.15 to 353.15 K. For 1-methylimidazolium class of PILs, E(T)(30) was found to be independent over the entire range of temperature, while E(T)(30) was noted to decrease with a rise in...
Quantitative structure-activity relationships (QSAR) for a series of N(7)-substituted guanosines as substrates for calf spleen purine nucleoside phosphorylase (PNP) were developed, and compared with those for acid hydrolysis of these analogues. There is no correlation between the rates for enzymatic phosphorolysis and acid hydrolysis, indicating that for the enzymatic reaction labilization of t...
A series of diethylmethyl(2-methoxyethyl)ammonium (DEME)-based ionic liquids were prepared using bis(perfluoroalkanesulfonyl)amide (C(n)F(2n+1)SO(2))(2)N anions with different perfluoroalkyl chain lengths (n = 0, 1, 2, 3, and 4), and the influence of the structural variation on their thermal, ion-diffusive (ionic conductivity and viscosity), ion-concentration (molar concentration and ion associ...
In this paper, we study the antipode of a finite-dimensional Hopf algebra H with dual Chevalley property and obtain an annihilation polynomial for antipode. This generalizes old result given by Taft Wilson in 1974. As consequences, show that 1) quasi-exponent is same as exponent its coradical, is, qexp ( ) = exp 0 ; 2) ⋊ k 〈 S 2 〉 .
We calculate the Gerstenhaber bracket on Hopf algebra and Hochschild cohomologies of Taft Tp for any integer p>2 which is a nonquasi-triangular algebra. show that indeed zero cohomology Tp, as in all known quasi-triangular algebras. This example first computation Also, we find general formula with bijective antipode bar resolution reminiscent Gerstenhaber's original cohomology.
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