by Bimenyimana Jean-Claude  and Meisheng Dong

Received: 06 January 2026;  Published: 04 June 2026;  doi: 10.21926/aeer.2602012

This study examines the effects of stock market development (SMC) and renewable energy consumption on CO2 emissions in nine African economies over the period 2000-2024. It also tests whether domestic credit to the private sector (DC) moderates the relationship between stock market development and CO2 emissions. Panel data econometrics, including Feasible Generalized Least Squares (FGLS) for the main estimates and Panel-Corrected Standard Errors (PCSE) for robustness checks, are used as the primary analytic techniqu [...]

by Bianca Gonçalves Rodrigues  , Elaine Alves de Faria Braga  , Marccus Victor Almeida Martins  and Jocélia Pereira de Carvalho Oliveira

Received: 14 February 2026;  Published: 07 June 2026;  doi: 10.21926/cr.2602005

This study reports the synthesis of magnetic nanoparticles (Fe3O4) supported on silica (SiO2), obtained from the chemical and thermal treatment of coconut mesocarp. The spectroscopic and morphological properties of this nanocomposite composed of magnetite and silica (Np-Fe3O4/SiO2) were investigated using Infrared (FTIR), Ultraviolet and Visible (UV-Vis), X-ray Diffraction (XDR), Field Emission Scanning Electron Microscopy (FEG-SEM), and Energy Dispersive X-ray Spectroscopy (EDS) techniques. The synthesized materia [...]

by Diwakar Singh  and Anita Singh

Received: 06 February 2026;  Published: 09 June 2026;  doi: 10.21926/rpn.2602007

Extracellular vesicles (EVs) are nanoscale, lipid-bilayer carriers that mediate intercellular communication by transporting proteins, lipids, and nucleic acids, thereby influencing physiological and pathological processes. This review integrates current knowledge on milk-derived and human extracellular vesicles, highlighting their multifunctional roles in therapy, diagnostics, and regenerative medicine. Milk-derived EVs (MEVs), small EVs (sEVs), and human milk EVs (hMEVs) demonstrate unique stability, biocompatibil [...]

by Frederick H. Silver  and Tanmay Deshmukh

Received: 21 February 2026;  Published: 07 June 2026;  doi: 10.21926/obm.genet.2602345

Skin cancer is a major disease that affects older subjects in the US. There are 56 million Americans 65 years and older in the US and the median age for melanoma diagnosis in the United States is 66 years. Each year 6 M patients are treated for skin cancer including basal cell carcinoma, squamous cell carcinoma, and melanoma. Both melanoma and squamous cell carcinoma can metastasize with melanoma being more likely to metastasize compared to squamous cell carcinoma and lead to death. The need to screen older subject [...]

by Julia Baumann  , Eva Bönzli  , Franziska Wandrey  and Torsten Grothe

Received: 07 June 2026;  Published: 09 June 2026;  doi: 10.21926/obm.geriatr.2602338

The complex process of skin aging results in noticeable changes, including decreased collagen content, reduced elasticity, and decreased hydration. Interventions to preserve or restore collagen, a key structural protein, may help counteract these signs. The concept of "beauty from within” through nutritional supplements is of growing interest, particularly the use of plant-based alternatives to animal-derived or synthetic collagen. This study investigated the anti-aging potential of an extract from Moldavian dragon [...]

by Cassandra R. Hatt  , Aaron M. Eakman  and Allison A. M. Bielak

Received: 17 December 2025;  Published: 09 June 2026;  doi: 10.21926/obm.geriatr.2602339

Multiple theories from the psychological and occupational therapy sciences suggest that there may be reciprocity between activity selection and the meanings we draw from them. As such, meaningfulness may be an important contextual mechanism through which activity engagement positively influences cognition, but no research has examined these links in healthy middle-aged and older adults. This study examined the predictive ordering of the associations between activity engagement, meaningfulness, and cognition. Eighty [...]

by Ashok Chakraborty  and Smita Guha

Received: 19 January 2026;  Published: 12 June 2026;  doi: 10.21926/rpn.2602008

Neuro degenerative diseases involve protein aggregation that causes neural cell death or loss of neural communication that affects body balance, movement, talking, breathing, and heart function. Aggregation of proteins, like α-synuclein, are found in Parkinson’s disease (PD), while tau, amyloid-β42 and TDP-43, are aggregated in Alzheimer’s disease (AD). Besides, amyotrophic lateral sclerosis (ALS); dementia with Lewy bodies (DLB); dystrophic neuritis (DN); corticobasal degeneration (CBD); argyrophilic grain disease [...]