Results 1 to 10 of about 64,852 (149)

Previously Uncharacterised Aliphatic Amino Acid Positions Modulate the Apparent Catalytic Activity of the EAL Domain of ZMO_1055 and Other Cyclic Di‐GMP‐Specific EAL Phosphodiesterases [PDF]

Microbial Biotechnology
The nearly ubiquitous second messenger cyclic di‐GMP signalling system decides about the bacterial lifestyle transition between sessility and motility. GGDEF diguanylate cyclase and EAL phosphodiesterase domains conventionally conduct the turnover of the
Lian‐Ying Cao, Xue Zhang, Feng‐wu Bai, Ute Römling   +3 more
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A Natural Approach to Solving the Traveling Salesman Problem

Кібернетика та комп'ютерні технології, 2023
Introduction. The traveling salesman problem is a transport-type problem. It is natural to use a method based on the technology for solving transport problems to solve it.
Dmitri Terzi
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Error correction by Reed–Solomon codes using its automorphisms

Весці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2021
The article explores the syndrome invariants of АГ-group of automorphisms of Reed–Solomon codes (RS-codes) that are a joint group of affine and cyclic permutations. The found real invariants are a set of norms of N Г-orbits that make up one or another АГ-
V. A. Lipnitsky, S. I. Semyonov
doaj   +1 more source

Three-Component Condensation of β-Ketonitriles, 4-Fluorobenzaldehyde, and Secondary Cyclic Amines

Reactions, 2022
A new three-component condensation of β-ketonitriles, 4-fluorobenzaldehyde, and secondary cyclic amines was developed. A possible reaction mechanism has been proposed including Knoevenagel condensation followed by aromatic nucleophilic substitution.
Dmitry V. Osipov, Kirill S. Korzhenko, Vitaly A. Osyanin   +2 more
doaj   +1 more source

Amide-to-ester substitution as a stable alternative to N-methylation for increasing membrane permeability in cyclic peptides

Nature Communications, 2023
Naturally occurring peptides with high membrane permeability often have backbone ester bonds. Here, the authors investigated the effect of an amide-to-ester substitution on membrane permeability of peptides and found the substitution is useful for ...
Yuki Hosono, Satoshi Uchida, Moe Shinkai, Chad E. Townsend, Colin N. Kelly, Matthew R. Naylor, Hsiau-Wei Lee, Kayoko Kanamitsu, Mayumi Ishii, Ryosuke Ueki, Takumi Ueda, Koh Takeuchi, Masatake Sugita, Yutaka Akiyama, Scott R. Lokey, Jumpei Morimoto, Shinsuke Sando   +16 more
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Cyclic Voltammetry Studies on Substituted Arenesulfonhydrazides [PDF]

Journal of Chemical Research, 2000
Additional Z and Boc groups on the vicinal nitrogen of sulfonyl hydrazines have no significant effect on the cathodic potential of the sulfonyl functions as measured by cyclic voltammetry, whereas a Boc group on the geminal nitrogen invariably gives rise to shifts of about 0.2 V to less negative potential similar to those previously observed for ...
Ragnarsson, Ulf, Grehn, Leif, Maia, Hernâni Lopes Silva, Monteiro, Luís S.   +3 more
openaire   +2 more sources

Syndrome spectrums of error orbits in RS-codes

Системный анализ и прикладная информатика, 2020
This article is devoted to the research of the properties of syndromes of errors in Reed-Solomon codes. RS-codes are built on non-binary alphabets. So, unlike BCH-codes, RS-codes contain an extremely large variety of correctable errors.
V. A. Lipnitski, S. I. Semyonov
doaj   +1 more source

Implementation of a nonlinear transformation of a substitution in the form of elements of a numbering system of a number of factorial sets

Безопасность информационных технологий, 2021
The paper investigates a nonlinear substitution transformation, presented as an element of the number system of factorial sets. This approach takes into account the characteristic features of substitutions and al-lows you to minimize the amount of memory
Alexander P. Martynov, Dmitry B. Nikolaev, Kirill D. Ermakov   +2 more
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Dialkylboryl-Substituted Cyclic Disilenes Synthesized by Desilylation-Borylation of Trimethylsilyl-Substituted Disilenes [PDF]

Molecules, 2021
π-Electron systems of silicon have attracted attention because of their narrow HOMO-LUMO gap and high reactivity, but the structural diversity remains limited. Herein, new dialkylboryl-substituted disilenes were synthesized by the selective desilylation-borylation of the corresponding trimethylsilyl-substituted disilenes.
Tanaka, Kaho, Akasaka, Naohiko, Kosai, Tomoyuki, Honda, Shunya, Ushijima, Yuya, Ishida, Shintaro, Iwamoto, Takeaki   +6 more
openaire   +3 more sources

The automorphisms and error orbits of Reed – Solomon codes

Доклады Белорусского государственного университета информатики и радиоэлектроники, 2020
The purpose of this work with its results presented in the article was to develop and transfer to the class of Reed – Solomon codes (RS-codes) the basic provisions of the theory of syndrome norms (TNS), previously developed for the noise-resistant coding
S. I. Semyonov, V. A. Lipnitsky
doaj   +1 more source