by Victoria Lorenzetti  , Elena Bargagli  , Antonella Fossi  , David Bennett  , Paolo Cameli  and Paola Rottoli

Received: 30 August 2018;  Published: 18 December 2018;  doi: 10.21926/obm.transplant.1804033

Background: Alpha-1-antitrypsin (AAT) deficiency is the most common hereditary disorder in adults and is associated with an increased risk of developing lung emphysema. Methods:Here, we report the case of a 54-year-old man, who underwent bilateral lung transplantation due to AAT deficiency emphysema in the general hospital of Siena, Italy. Results:The patient was diagnosed with partial AAT deficiency (189 mg/dL) associated with the PIMZ genotype; although he quit smoking, his lung disease progressed to chronic resp [...]

by Xiang-Yu Sun  , Ping-Hong Jhou  , Min-Ze Lu  and Chang-Ming Liaw

Received: 25 February 2021;  Published: 22 June 2021;  doi: 10.21926/jept.2102028

This paper presents the development of a wind Interior Permanent-Magnet Synchronous Generator (IPMSG) based bipolar DC microgrids along with various switch-mode rectifiers. Firstly, the wind IPMSG is established and adequately controlled to possess satisfactory generating characteristics during different driven speeds and loads. Later, the boost switch-mode rectifier (SMR) based bipolar DC bus is established. Further, three-phase single-switch (3P1SW) boost SMR, three-phase two-switch (3P2SW) three-level boost SMR, [...]

by Hiromi Matsuhashi

Received: 28 April 2022;  Published: 06 June 2022;  doi: 10.21926/cr.2202015

Solid base catalysts consisting of MgO modified with 10 mol% ZnO (ZnO/MgO) were prepared by depositing zinc(II) acetylacetonate (Zn(acac)2) in polar and nonpolar organic solvents on the surface of MgO and Mg(OH)2. The process was followed by thermal decomposition in air at 773 K over a period of 3 h. The activity of MgO modified with Zn(acac)2 for base-catalyzed retroaldol reaction (the decomposition of diacetone alcohol (4-hydroxy-4-methyl-2-pentanone) to acetone) at 299 K was higher than the activity of unmodifie [...]

by Oliver Reed  , Patrick B Allen  , Grant Caddy  , John Eccles  and Tony CK Tham

Received: 28 January 2019;  Published: 26 March 2019;  doi: 10.21926/obm.hg.1901015

Crohn’s disease is a chronic inflammatory condition of the gastrointestinal tract which can result in luminal stenosis and up to 90% of patients requiring surgery during their lifetime. Medical management aims to reduce the inflammatory burden to prevent the development of inflammatory strictures, progression to fibro-stenosis and subsequent obstructive symptoms. Endoscopic balloon dilatation (EBD) is a well-established, safe technique in the management of short strictures to prevent patients having multiple surgic [...]

by Ian Macreadie  and Sudip Dhakal

Received: 05 May 2019;  Published: 17 July 2019;  doi: 10.21926/obm.geriatr.1903064

The yeast, Saccharomyces cerevisiae, the model eukaryote, has provided much understanding of molecular and cellular biology, as well as insights into many human diseases. In this paper we review how yeast studies are contributing to knowledge about the role of oxidative damage to cell health, and how one of the key players in Alzheimer’s disease, amyloid beta (Aβ) is linked to the reactive oxygen species response involving AHP1, which encodes an alkyl hydroperoxidase, Ahp1p, a protein involved in protect [...]

by Yi-Chia Liao  , Chun-Hway Hsueh  and Wen-Shin Lee

Received: 16 May 2020;  Published: 15 June 2020;  doi: 10.21926/rpm.2002014

Inspired by the application of metallic glass sheet as face material for improving the performance of golf clubs, the present work was aimed to explore the application of thin-film metallic glass (TFMG) coatings for enhancing the performance of strings. In order to achieve this aim, badminton strings were coated with TFMG coatings of different thicknesses. The compositions of these TFMG coatings were analyzed using an electron probe micro-analyzer. The amorphous structure of the film was verified using X-ray diffra [...]

by Omid Ranjbar Pouya  , Ahmad Byagowi  , Debbie M. Kelly  and Zahra Moussavi

Received: 20 August 2018;  Published: 27 June 2019;  doi: 10.21926/obm.geriatr.1902059

Background: Previous studies have reported that coordinate information (i.e. distance between any two objects in a specific direction) is encoded differently from Virtual Reality (VR) and physical scenes. However, the accuracy of encoding categorical information (i.e. relative positions of objects) from VR scenes has not been adequately investigated. During this study, we used a novel rotating visual scene to study the effects of aging, prior experience with VR, and dementia on the accuracy of encoding categorical [...]

by Joseph S. D'Arrigo

Received: 26 December 2019;  Published: 28 February 2020;  doi: 10.21926/obm.geriatr.2001110

Aging, hypertension, diabetes, obesity, atherosclerosis, traumatic brain injury, and other factors can all synergistically promote diverse pathological mechanisms. These risk factors trigger widespread inflammation and oxidative stress, both of which can lead to blood-brain barrier (BBB) disruption. These pathological cascades lead to neuronal Ca2+ increase, neurodegeneration, gradual cognitive/memory decline, and eventually Alzheimer's disease. In particular, more recent research indicates that chronic inflamm [...]

by Yoko Kawamura

Received: 15 May 2025;  Published: 30 October 2025;  doi: 10.21926/obm.geriatr.2504329

In Japan, a super-aging society, the development of Ikigai is considered the key to extending healthy longevity in national policy. Thus, activities provided by local governments are designed to encourage Ikigai. At this point, Ikigai has developed its conceptual understanding, which includes its distinctiveness from life purposes and other closely related concepts. Empirical studies using developed measurements have shown that Ikigai has an impact on the mental and physical health of older adults across countries [...]

by Katrine Hygum  , Jakob Starup-Linde  , Torben Harsløf  and Bente Langdahl

Received: 29 August 2019;  Published: 04 December 2019;  doi: 10.21926/obm.geriatr.1904090

Background: The increased risk of fractures in individuals with diabetes has been underestimated by conventional fracture predictors such as the bone mineral density T-score or the Fracture Risk Assessment Tool. The present study conducted a systematic review and a meta-analysis to investigate the association between the levels of bone turnover markers (BTMs) and fractures in patients with diabetes. Methods: We conducted a systematic literature search. Eligibility criteria were studies investigating BTMs in patient [...]