NMR study of magnetic nanoparticles Ni@C

The 61Ni, 13C NMR spectra of carbon encapsulated nickel nanoparticles have been obtained. It has been shown that the cores of the particles consist of metallic nickel with face-centered cubic structure, nickel carbide Ni3C and carbon-nickel solid solution. The carbon shell of nanoparticles is a highly defective structure and close to an amorphous glassy-like carbon. © Published under licence by IOP Publishing Ltd.Ural Branch, Russian Academy of Sciences, UB RAS: 18-10-2-37.The study was performed within the state assignments of the Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences: state program «Function» No АААА-А19-119012990095-0; state program «Magnit» No АААА-А18-118020290129-5 and state program «Alloys». The research also was supported by the project of the complex program of Ural Branch of Russian Academy of Sciences № 18-10-2-37

Magnetic Nanocomposite Materials Based on Fe3O4 Nanoparticles with Iron and Silica Glycerolates Shell: Synthesis and Characterization

Novel magnetic nanocomposite materials based on Fe3O4 nanoparticles coated with iron and silica glycerolates (MNP@Fe(III)Glyc and MNP@Fe(III)/SiGlyc) were obtained. The synthesized nanocomposites were characterized using TEM, XRD, TGA, VMS, Mössbauer and IR spectroscopy. The amount of iron and silica glycerolates in the nanocomposites was calculated from the Mössbauer spectroscopy, ICP AES and C,H-elemental analysis. Thus, it has been shown that the distribution of Fe in the shell and core for MNP@Fe(III)Glyc and MNP@Fe(III)/SiGlyc is 27:73 and 32:68, respectively. The synthesized nanocomposites had high specific magnetization values and a high magnetic response to the alternating magnetic field. The hydrolysis of shells based on Fe(III)Glyc and Fe(III)/SiGlyc in aqueous media has been studied. It has been demonstrated that, while the iron glycerolates shell of MNP@Fe(III)Glyc is resistant to hydrolysis, the silica glycerolates shell of MNP@Fe(III)/SiGlyc is rather labile and hydrolyzed by 76.4% in 24 h at 25 °C. The synthesized materials did not show cytotoxicity in in vitro experiments (MTT-assay). The data obtained can be used in the design of materials for controlled-release drug delivery. © 2023 by the authors.22-23-20032; Russian Science Foundation, RSFThe work was financially supported by the Russian Science Foundation and the Government of the Sverdlovsk Region (project no. 22-23-20032)

Individual iron(iii) glycerolate: synthesis and characterisation

Iron(ii) and iron(iii) salts of strong acids form iron glycerolates on heating at 180 °C with glycerol in the presence of an equivalent amount of alkali. Individual iron(iii) glycerolate was obtained for the first time. When Fe3O4 magnetic nanoparticles were heated with glycerol, an iron(iii) glycerolate shell was formed on their surface. This journal is © The Royal Society of Chemistry.Ministry of Education and Science of the Russian Federation, Minobrnauka: 075-15-2020-777The work was carried out with nancial support from the Ministry of Science and Higher Education of the Russian Federation (grant 075-15-2020-777) using the equipment of the Centre for Joint Use “Spectroscopy and Analysis of Organic Compounds” at the Postovsky Institute of Organic Synthesis of UB RAS. Mössbauer spectroscopy, XRD, and HRTEM studies were carried out within the state programs of Miheev Institute of Metal Physics of UB RAS («Function»), Institute of Solid State Chemistry of UB RAS, and Ural Federal University, correspondingly. Authors are grateful to Dr Maksim S. Karabanov (Ural Center for Shared Use “Modern Nanotechnology” at the Ural Federal University) for HRTEM study

Socioeconomic status, sex, and obesity in a large national cohort of 15-87-year-old Open University students in Thailand

Background: As obesity increases, middle-income countries are undergoing a health-risk transition. We examine the association between socioeconomic status (SES) and emerging obesity in Thailand, and ascertain if an inverse relationship between SES and obesity has appeared. Methods: The data derived from 87 134 individuals (54% female; median age, 29 years) in a national cohort of distance-learning Open University students aged 15-87 years and living throughout Thailand. We calculated adjusted odds ratios for associations of SES with obesity (body mass index, ≥25) across 3 age groups by sex, after controlling for marital status, age, and urbanization. Results: Obesity increased with age and was more prevalent among males than females (22.7% vs 9.9%); more females were underweight (21.8% vs 6.2%). Annual income was 2000 to 3000 US dollars for most participants. High SES, defined by education, income, household assets, and housing type, associated strongly with obesity-positively for males and inversely for females-especially for participants younger than 40 years. The OR for obesity associated with income was as high as 1.54 for males and as low as 0.68 for females (P for tren

Managerialism in the Australian public health sector: towards the hyper-rationalisation of professional bureaucracies

This paper draws on qualitative case-study research to discuss the impact of managerialism on the work organisation of public sector health professionals in Australia. The case studies included 71 semi-structured interviews with a broad range of public sector health professionals (predominantly nursing and allied health professionals, with some doctors and managers). The data are used to examine the implications of managerialism for the organisation of professional (public) bureaucracies. The findings show that while health professionals were able to exert their agency to influence managerial processes, the incorporation of managerial strategies into professional practice placed constraints upon professional autonomy. The impact of managerialism on professional bureaucracies is examined using the neo-Weberian framework of hyper-rationality, an ideal type derived from a combination of four forms of rationality identified in Weber's work: practical, formal, substantive and theoretical rationality. Applied to the social organisation of health-care work, this paper critically examines the utility of the hyper-rationality ideal type, noting its limitations and the insights it provides in conceptualising the impact of managerialism on professional (public) bureaucracies

Women, motherhood, and living with HIV/AIDS : an introduction

This chapter sets the scene of this book. It provides a background understanding about women living with HIV/AIDS. It discusses salient issues concerning women who are mothers and the essence of having children as well as infant feeding practises. A gender lens perspective is also introduced as all chapters in the volume are argued to be situated within this approach. The chapter also introduces the book and it outlines details of all chapters which are included in the volume