by Mohsen Pourfallah  and Ethan Languri

Received: 19 October 2024;  Published: 15 January 2025;  doi: 10.21926/jept.2501003

Parabolic trough collectors (PTCs) are essential for solar thermal energy systems, and their thermal efficiency can be significantly enhanced using turbulators and nanofluids. This numerical study introduces three novel fin-spiral turbulator configurations (4, 7, and 10 blades) to enhance heat transfer within the absorber tube. Additionally, three nanofluid types including water-based single-walled carbon nanotubes (SWCNT), cupric oxide (CuO), and a hybrid SWCNT-CuO, at concentrations of 1%, 3%, and 5% were evaluat [...]

by Zaid Albayati  , Sally Heyworth  , Jane Moberly  , Derek Middleton  , Brian Flanagan  , Abdul Hammad  and Stephen E Christmas

Received: 10 October 2018;  Published: 14 December 2018;  doi: 10.21926/obm.transplant.1804032

Background:HLA-G is an immunosuppressive molecule with a potential role in allograft acceptance. Methods:Expression of HLA-G on leucocyte subpopulations was studied in a group of 21 renal transplant patients immediately prior to and 2 months post-transplantation. Results:Significant increases in proportions of total HLA-G+CD4+ T cells were seen (0.5+/-0.1% to 7.9+/-3.2%; p<0.01) and also for CD45RA+, CD45RO+ and CD69+ subsets. Increases in proportions of HLA-G+ cells were also seen in CD8+ T cells and their [...]

by Gerhard Litscher

Received: 18 January 2021;  Published: 20 January 2021;  doi: 10.21926/obm.icm.2101003

Neuro-photobiomodulation (PBM) is a relatively novel optical stimulation method that is not yet generally accepted in conventional medicine. Therefore, evidence-based research in this sub-area, which is important for laser medicine, is necessary in order to provide appropriate scientific evidence for a better understanding of neuro-PBM. In this editorial, a summary of the recent results with stimulation using different frequencies (e.g., 40 Hz, 136.1 Hz) is presented. The contribution is intended to stimulate resea [...]

by Igor Val Danilov  , Araksia Svajyan  and Sandra Mihailova

Received: 05 April 2023;  Published: 18 October 2023;  doi: 10.21926/obm.neurobiol.2304189

This pilot study (n = 19) examines fidelity rates of the new computer-aided method of diagnosing cognitive development delay in 3-to-6-year-old children. The small-scale research repeats the methodological components of the previous two studies, only changing the data collection process by introducing the baseline value (BV). Experimental data show a significant increase of 9.4 times in the shared intentionality magnitude in neurodivergent children. The results support the hypothesis that the bioengineering system [...]

by Jessica R Turnbull  , Jenna Vyas-Lee  and Sally Hobson

Received: 17 November 2020;  Published: 06 May 2021;  doi: 10.21926/obm.neurobiol.2102094

Sleep-related difficulties are common in children with neurodevelopmental disabilities. Poor sleep health is associated with detrimental impacts not only for the child/young person, but also their family members. Exercise is considered to be important for sleep health, improving duration and quality of sleep in adult studies, however there is limited literature on impact in children with neurodevelopmental disabilities, and barriers to participation exist for this group. We set out to test the feasibility and accep [...]

by Lordwin Girish Kumar Jeyakumar  , David B. McKenzie  , Laura E. Christianson  and Evan Derdall

Received: 29 December 2020;  Published: 15 April 2021;  doi: 10.21926/aeer.2102005

Denitrifying bioreactor technology, where a solid carbon source (woodchips) acts as a reactive medium to intercept agricultural tile drainage water, has been successfully used to convert N (NO3-) to di-nitrogen (N2) gas. Four replicated field-scale (24 m long × 3 m wide × 1 m deep), bioreactors were built and operated at the St. John's Research and Development Centre and were successful at removing a notable amount of nitrate (N) from agricultural subsurface drainage water. The objective of this study [...]

by Christopher K. Russell  , Arunima Saxena  and Jeffrey T. Miller

Received: 28 March 2023;  Published: 06 June 2023;  doi: 10.21926/cr.2302018

Previous studies on the conversion of olefins to aromatics with bifunctional Ga- or Zn-ZSM-5 catalysts have concluded that benzene, toluene, and xylenes (BTX) yields are significantly higher than for ZSM-5 alone. These results were attributed to the higher aromatic dehydrogenation rate of Ga or Zn. In this study, a highly active, bifunctional PtZn/SiO2 (1.3 wt% Pt, 2.6 wt% Zn) with H-ZSM-5 (Si/Al = 40) catalyst is investigated for propene aromatization at 723 K and 823 K. At low to moderate propene conversions, in [...]

by Joseph S. D'Arrigo

Received: 27 December 2018;  Published: 17 June 2019;  doi: 10.21926/obm.geriatr.1902057

Much evidence has been published which indicates that microvascular endothelial dysfunction, due to cerebrovascular risk factors (e.g., atherosclerosis, hypertension, obesity, diabetes, smoking, aging), precedes cognitive decline in Alzheimer's disease and contributes to its pathogenesis. By incorporating appropriate drug(s) into biomimetic (lipid cubic phase) nanocarriers, one obtains a multitasking combination therapeutic which targets certain cell-surface scavenger receptors, and crosses the blood-brain barrier [...]

by Steven R. Brenner

Received: 29 August 2018;  Published: 26 February 2019;  doi: 10.21926/obm.geriatr.1901035

Alzheimer Disease may result from excessive stimulation of the innate immune system from development of underlying opportunistic infections and impaired age related self-recognition as non-self, due to immunodeficiency and immunosenescence, resulting in excessive inflammation and runaway Beta-amyloid production (a component of the innate immune system) causing cytosolic calcium overload. Excessive cytosolic calcium may cause over activation of calcineurin and inactivation of cis-trans prolyl isomerase (Pin1), with [...]

by Gilbert Ahamer

Received: 07 December 2023;  Published: 13 May 2024;  doi: 10.21926/jept.2402011

The present need for an energy transition in the wake of a global climate catastrophe led to the “EU green deal” which requires a transition of the energy system in all countries. This study aimis survey aims to identify strategies within such an energy transition based on global trend analyses and reports on available technologies for implementation. Based on a literature analysis of over 300 pieces (of feasibility studies and technology implementation reports with a focus on Central Europe) and a statistical anal [...]