#### Table of contents

Bulg. J. Phys. vol. **50** no. 2 (2023)

**Certain Investigations on Bulk Viscous String Models of the Universe with BVDP**

R.K. Mishra, Heena Dua

pp. 095-114, [abs, pdf]

**Anisotropic Bianchi Type-I String Cosmological Models in Normal Gauge for Lyra?s Manifold with Variable Deceleration Parameter**

Shilpi Singhal, S.R. Bhoyar, Vandna Srivastava

pp. 115-126, [abs, pdf]

**Synthesis, Growth and Characterization of Magnesium Sulfate Doped L-Leucinium Oxalate Semi-Organic Crystal for Laser Applications**

P. Gershom Jebaraj, V. Sivashankar

pp. 127-145, [abs, pdf]

**Proof of the Orthogonal—Pin Duality**

K. Neergård

pp. 146-158, [abs, pdf]

**Thermodynamic, Vibrational Spectroscopic and Antimicrobial Study of a Peptide with an Electrolyte in Non-Aqueous Medium**

R. Geetha, R. Padmavathy, T. Malini, N. Radha

pp. 159-167, [abs, pdf]

**Curvature Properties of Bardeen Black Hole Spacetime**

A.A. Shaikh, S.K. Hui, M. Sarkar

pp. 168-189, [abs, pdf]

**An Oscillating Holographic Dark Energy in**

*f(R)*GravityA.Y. Shaikh, D.P. Tadas, S.D. Katore

pp. 190-205, [abs, pdf]

**Reconstruction of**

*f*(*R*) Gravity from a Polytropic Gas Scalar Field Dark Energy ModelChandra Rekha Mahanta, Krishna Pandit

pp. 206-218, [abs, pdf]