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Symmetry, Volume 15, Issue 5

May 2023 - 172 articles

Cover Story: In nNature, amino acids, carbohydrates, and some lipids are “chiral” compounds, since they exist as two identical molecules that use the space differently. TAs our hands, these chiral compounds (designated as L- and D-enantiomers) are mirror images. Focusing on amino acids, the L- and D-enantiomers play relevant and distinct roles in biochemical structures and metabolic processes. Here, we reviewed the knowledge about the enantioselective interaction between proteins and chiral amino acids. In particular, we elucidated the molecular basis which allows foring the discrimination between the opposite enantiomers in amino acid oxidases, dehydrogenases, and aminotransferases. Finally, the evolutive mechanisms leading to the observed enzymes’ specificity have been described. View this paper
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Articles (172)

  • Article
  • Open Access
5 Citations
2,103 Views
14 Pages

A Symmetry Histogram Publishing Method Based on Differential Privacy

  • Tao Tao,
  • Siwen Li,
  • Jun Huang,
  • Shudong Hou and
  • Huajun Gong

17 May 2023

The differential privacy histogram publishing method based on grouping cannot balance the grouping reconstruction error and Laplace noise error, resulting in insufficient histogram publishing accuracy. To address this problem, we propose a symmetric...

  • Article
  • Open Access
1 Citations
1,526 Views
18 Pages

17 May 2023

In this paper, based on the viscosity approximation method and the hybrid steepest-descent iterative method, a new implicit iterative algorithm is presented for finding the common fixed points set of a finite family of nonexpansive mappings in a refl...

  • Article
  • Open Access
21 Citations
1,865 Views
16 Pages

Exploration of Quantum Milne–Mercer-Type Inequalities with Applications

  • Bandar Bin-Mohsin,
  • Muhammad Zakria Javed,
  • Muhammad Uzair Awan,
  • Awais Gul Khan,
  • Clemente Cesarano and
  • Muhammad Aslam Noor

16 May 2023

Quantum calculus provides a significant generalization of classical concepts and overcomes the limitations of classical calculus in tackling non-differentiable functions. Implementing the q-concepts to obtain fresh variants of classical outcomes is a...

  • Article
  • Open Access
3 Citations
2,081 Views
24 Pages

16 May 2023

Parameter estimation for devices containing or supporting quantum systems is a field of quantum metrology using quantum probe states to reach their characterization. Pauli channels are ideal structures where qubits are transmitted or contained, commo...

  • Article
  • Open Access
1,694 Views
19 Pages

16 May 2023

The images discussed in this manuscript show atmospheric conditions of smog, sandstorm, and dust. Moreover, the images were taken in various environments and have features such as dimness or color cast. The smoggy image has a greenish or bluish color...

  • Article
  • Open Access
1 Citations
1,604 Views
17 Pages

16 May 2023

In recent works by Wu and Wang a class of explicit symplectic integrators in curved spacetimes was presented. Different splitting forms or appropriate choices of time-transformed Hamiltonians are determined based on specific Hamiltonian problems. As...

  • Article
  • Open Access
16 Citations
5,368 Views
15 Pages

A Novel 3D Complex Welding Seam Tracking Method in Symmetrical Robotic MAG Welding Process Using a Laser Vision Sensing

  • Gong Zhang,
  • Jing Huang,
  • Yueyu Wu,
  • Gen Yang,
  • Si Di,
  • Hai Yuan,
  • Xuepeng Cao and
  • Kyoosik Shin

16 May 2023

The welding seam tracking operation ensures that the welding torch of the welding robot can go with the welding seam during the whole symmetrical robotic welding procession. To achieve three-dimensional complex welding seams tracking, a four-step wel...

  • Article
  • Open Access
4 Citations
2,130 Views
10 Pages

16 May 2023

Nematic liquid crystals (LCs) are known to undergo a phase transition to chiral nematic LCs possessing helices upon doping with enantiomeric molecules known as chiral dopants. The relationship between the helical pitch (p), the molar fraction (x), an...

  • Article
  • Open Access
10 Citations
3,496 Views
25 Pages

Path Planning Algorithm for a Wheel-Legged Robot Based on the Theta* and Timed Elastic Band Algorithms

  • Junkai Sun,
  • Zezhou Sun,
  • Pengfei Wei,
  • Bin Liu,
  • Yaobing Wang,
  • Tianyi Zhang and
  • Chuliang Yan

16 May 2023

Aimed at the difficulty of path planning resulting from the variable configuration of the wheel-legged robot for future deep space explorations, this paper proposes a path planning algorithm based on the Theta* algorithm and Timed Elastic Band (TEB)...

  • Article
  • Open Access
8 Citations
1,861 Views
13 Pages

16 May 2023

In this article, the aim was to obtain kink soliton solutions of the (2+1)-dimensional integro-differential Jaulent–Miodek equation (IDJME), which is a prominent model related to energy-dependent Schrödinger potential and is used in fluid...

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Symmetry - ISSN 2073-8994