Yerevan State University

Bioconversion of coffee waste via two-stage fermentation using Saccharomyces cerevisiae and Escherichia coli

In this study, a two-stage fermentation strategy using Saccharomyces cerevisiae and Escherichia coli was developed for spent coffee grounds (SCG) hydrolysate valorization. In the first stage, S. cerevisiae ATCC 13,007 was cultivated in thermally and acid-hydrolyzed SCG hydrolysat...

Plant Proteins and Bioactive Peptides: Distinguishing Nutritional Quality from Sequence-Dependent Bioactivity

Plant proteins represent both important nutritional resources and reservoirs of encrypted bioactive peptide sequences. However, protein nutritional quality and peptide bioactivity are distinct properties: a favorable indispensable amino acid profile or high digestibility does not...

Viscosity Supersolution Barriers to a Non-local Free Boundary Problem

We study a parabolic obstacle partial integro-differential equation with a dynamically moving bilateral free boundary. This type of problem arises in the mathematical modeling of speculative asset bubbles with L\'evy jump processes. We investigate the existence of viscosity super...

A review of light-induced bistability in liquid crystals

This review aims to summarise one of the most intriguing phenomena in the nonlinear optics of liquid crystals: optical bistability, in which two distinct output transmission states can exist for a single input light intensity. Since the earliest experiments on the orientational o...

Structural stability and optical properties of borate-based oxide Sr3Ti3O6(BO3)2

Borate-based oxide materials are an important class of compounds for optical applications due to their wide optical transparency window, optical response, and high laser damage threshold. In this work, the Sr-Ti-B-O quaternary system was investigated computationally for new mater...

Robust Causal Inference in Financial Markets: A Bayesian Activation–Inhibition Noisy-OR (BAINOR) Framework

The noisy-OR (NOR) model provides a computationally efficient representation of systems with multiple interacting causes, yet its classical formulation is limited in financial applications. Causal probabilities are typically expert elicited, assumed constant across observations,...

Electrooptic Reflective Metasurfaces for Discrete Beam Deflection

Abstract Dynamic, electrically controlled optical metasurfaces are essential flat-optics components that are intensively being developed for realizing compact beam steering, optical modulation, and programmable wavefront control. In this work, we propose a novel metasurface conce...

Convergence Analysis of a Numerical Algorithm for Spatial Segregation of Two Population Densities

Over the last few decades, the numerical approximation of spatial segregation equations for reaction-diffusion systems with $m$ population densities has gained significant interest. These problems are governed by a minimization problem subject to a closed but non-convex set. In t...

Dielectric Permittivity Tensor of Muscovite for Next Generation All Van Der Waals Broadband Photonic Components

ABSTRACT We report a comprehensive determination of the dielectric permittivity tensor of van der Waals (vdW) muscovite, also referred to as mica, establishing it as a low‐index, low‐loss platform for next‐generation nanophotonics. Resolving its anisotropic vibrational response a...

Analysis code — Substrate-associated variation in Ramalina bacteriobiomes and identification of Mucilaginibacter licheni sp. nov. through genome-resolved metagenomics

Analysis code for the metagenome assembly, bin refinement/QC, read mapping/coverage, taxonomic profiling, genome taxonomy/phylogenetics, genome annotation, and COG functional-annotation comparison steps described in the Materials and Methods of "Substrate-associated variation in...

Functionalized peptides incorporating non-canonical ɑ–amino acids: copper(II) coordination and cytotoxic activity

Unusual ɑ–amino acids, owing to their ability to accommodate diverse substituents while preserving a chiral center, constitute valuable building blocks in peptidomimetic design. Their incorporation enables fine-tuning of physicochemical and biological properties, while also provi...

Full event interpretation with machine-learning-based particle-flow reconstruction in the CMS detector

Abstract The particle-flow (PF) algorithm constructs a global description of each particle collision by producing a comprehensive list of final-state particles, and is central to event reconstruction in the CMS experiment at the CERN LHC. The existing PF implementation relies on...

How Norms Depend on the Presence and Status of Observers: The Relational Contingency of Everyday Behaviors in 90 Societies

Norms are fundamental to social life, but basic questions about how they are affected by social context remain. Specifically, how do normative constraints depend on the presence and status of observers, and how do such relational contingencies vary across cultures? Using data fro...

High Mitochondrial Haplotype Diversity and Western Palearctic Genetic Connectivity in White Stork (Ciconia ciconia) Populations of the South Caucasus

Understanding how historical climatic oscillations and contemporary dispersal interact to shape genetic diversity is central to interpreting population structure in long-distance migratory birds. The White Stork (Ciconia ciconia) has a broad trans-Eurasian distribution, yet popul...

Anticancer and Cardioprotective Properties of Medicinal Mushrooms: Current Evidence and Future Prospects

Introduction: Cardiotoxicity is an undesirable side effect of chemotherapy that limits the effectiveness of cancer treatment. Almost all cardiotoxic agents cause cardiovascular complications, leading to oxidative stress and other pathological conditions. The search for bioactive...

Laser-Generated Ultrashort Pulsed Electron Beams Induce p53-Related Alteration of DNA Repair and Cell Death Pathways in Non-Small Cell Lung Cancer Cells

Laser-driven accelerated particle beams have significantly advanced cancer treatment by facilitating the delivery of exceptionally high dose rates of radiation to solid tumors within femto- to picosecond timescales. This investigation compared the radiobiological effectiveness of...

A review of dispersing strategies for aluminum nitride suspensions in vat photopolymerization systems

Aluminum nitride (AlN) is a key ceramic material for thermal management applications due to its high thermal conductivity and electrical insulation. However, processing AlN via vat photopolymerization (VPP) remains challenging, as highly loaded suspensions must exhibit low viscos...