Results 221 to 230 of about 1,391,504 (276)

Potential thyroliberin affinity labels. 1. Chloroacetyl-substituted phenylalanylpyrrolidines

Journal of Medicinal Chemistry, 1981
Six analogues of thyroliberin (TRH) that have a chloroacetyl substituent at the amino terminus have been prepared as potential affinity labels for the TRH receptor. These compounds are N-(chloroacetyl)-L-alanyl-L-phenylalanylpyrrolidine (ClAc-Ala-Phe-Pyrr; 14), N-[m-(chloroacetyl)benzoyl]-L-phenylalanylpyrrolidine (m-ClAcBz-Phe-Pyrr; 11a), N-[m ...
R J, Goebel, B L, Currie, C Y, Bowers
openaire   +2 more sources

Intrinsic proton affinity of substituted aromatics

1998
It is shown that the MP2(fc)/6-31G*//HF/6-31G* + ZPE(HF/6-31G*) model reproduces very well the experimental proton affinities in a large number of substituted benzenes and naphthalenes. Extensive applications of this model revealed that the proton affinity of polysubstituted aromatics followed a simple additivity rule, which have been rationalized by ...
Maksić, Zvonimir, Maksić, Mirjana
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Methyl Cation Affinity vs Proton Affinity in Substituted Benzenes:  An ab Initio Study

The Journal of Physical Chemistry A, 1998
The proton (PA) and methyl cation (MCA) affinities of benzene and its di- and polysubstituted derivatives are examined at the MP2(fc)/6-31G**//HF/6-31G*+ZPE(HF/6-31G*) theoretical level. The calculated MCA of benzene is in good accordance with the experimental estimate. It is shown that MCAs of polysubstituted benzenes follow the additivity rule, which
Knežević, Andrea, Maksić, Mirjana, Maksić, Zvonimir   +2 more
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Implementation Mini (Advanced Encryption Standard) by Substitution Box in Galois Field (24)

2021 International Telecommunications Conference (ITC-Egypt), 2021
In this paper, a different method was used to find the Substitution Box, By the fourth exponent of the inverse of a function irreducible polynomial which is instead the first exponent of the inverse of the usual method, which is to use this different ...
Wageda I. El sobky, Abdelkader A. Isamail, A. Mohra, Ayman M. Hassan   +3 more
semanticscholar   +1 more source

Nucleophilic aromatic substitution approach to phosphanyl-substituted diboraanthracenes: biphilic compounds with tunable electron affinities

Organic Chemistry Frontiers, 2022
9,10-Dihydro-9,10-diboraanthracenes with one, two, or four Ph2P-substituents were prepared via nucleophilic aromatic substitution. P-oxidation, -sulfurization, or -methylation greatly facilitate the reduction of the compounds.
Tao Jin, Michael Bolte, Hans-Wolfram Lerner, Matthias Wagner   +3 more
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Systematically Modulating Aptamer Affinity and Specificity by Guanosine-to-Inosine Substitution

Analytical Chemistry, 2022
Aptamers are widely used in small molecule detection applications due to their specificity, stability, and cost effectiveness. One key challenge in utilizing aptamers in sensors is matching the binding affinity of the aptamer to the desired concentration range for analyte detection.
Brea A. Manuel, Sierra A. Sterling, Aimee A. Sanford, Jennifer M. Heemstra   +3 more
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Hydride Affinity Scale of Various Substituted Arylcarbeniums in Acetonitrile

The Journal of Physical Chemistry A, 2010
Combined with the integral equation formalism polarized continuum model (IEFPCM), the hydride affinities of 96 various acylcarbenium ions in the gas phase and CH(3)CN were estimated by using the B3LYP/6-31+G(d)//B3LYP/6-31+G(d), B3LYP/6-311++G(2df,2p)//B3LYP/6-31+G(d), and BLYP/6-311++G(2df,2p)//B3LYP/6-31+G(d) methods for the first time.
Xiao-Qing, Zhu, Chun-Hua, Wang
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Pillar substitution modulates CO2 affinity in “mmo” topology networks

Chemical Communications, 2013
The use of WO4(2-) instead of CrO4(2-) or MoO4(2-) as an angular pillar in topology nets has afforded two isostructural porous nets of formula [M(bpe)2WO4] (M = Co or Ni, bpe = 1,2-(4-pyridyl)ethene). The Ni variant, WOFOUR-1-Ni, is highly selective towards CO2 thanks to its exceptionally high isosteric heat of adsorption (Qst) of -65.5 kJ mol(-1) at ...
Mona H, Mohamed, Sameh K, Elsaidi, Tony, Pham, Katherine A, Forrest, Brant, Tudor, Lukasz, Wojtas, Brian, Space, Michael J, Zaworotko   +7 more
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Implementation of Super Encryption Using Affine Cipher, Playfair Cipher, and RSA on Image Files

Journal of Artificial Intelligence and Engineering Applications (JAIEA)
This research aims to enhance the security of image files by implementing a super-encryption technique that integrates three cryptographic algorithms from both classical and modern domains: Affine Cipher, Playfair Cipher, and RSA. Each algorithm provides
Muhamad Arif, Achmad Fauzi, Hermansyah Sembiring   +2 more
semanticscholar   +1 more source

Potential Thyroliberin Affinity Labels II: Chloroacetyl Substituted Phenylalanyl Prolineamides

Journal of Pharmaceutical Sciences, 1982
Three analogs of thyroliberin (I) were prepared. These compounds, N-m-chloroacetylbenzoyl-phenylalanyl-prolineamide (VIa), N-p-chloroacetylbenzoyl-phenylalanyl-prolineamide (VIb) and N-chloroacetyl-alanyl-phenylalanyl-prolineamide (IX), were designed as potential I antagonist affinity labels.
R J, Goebel, B L, Currie, C Y, Bowers
openaire   +2 more sources