a Hyperpolarization by dissolution dynamic nuclear polarization (DNP) is a versatile technique to dramatically enhance the nuclear magnetic resonance (NMR) signal intensity of insensitive long-T 1 nuclear spins such as 6 Li. The 6 Li longitudinal relaxation of lithium ions in aqueous solutions strongly depends on the concentration of paramagnetic species, even if they are present in minute amounts. We herein demonstrate that blood oxygenation can be readily detected by taking advantage of the 6 Li signal enhancement provided by dissolution DNP, together with the more than 10% decrease in 6 Li longitudinal relaxation as a consequence of the presence of paramagnetic deoxyhemoglobin.
The review of fire-prevention barriers of deformation seams both foreign, and domestic manufacturers is provided in article. It is shown that the fire-prevention barriers which are specially developed for application in deformation seams, guaranteed working at compression, stretching and shift of a seam are applied to protection of deformation seams at the fire it is established that production of innovative fireproof materials is one of the main objectives of fire safety, it and ways of consecutive transformation of the idea to the goods passing stages of researches, design developments, productions and realization in projects of civil and industrial function of buildings. The prime purpose – to pick up the complex decision providing the maximum satisfaction of requirements when performing fireproof works on protection of a deformation seam at impact of the fire.
This research covers fire risk classification for construction materials in the countries of the European Union and a full methodological approach to the assessment of the fire hazard, providing requirements, characteristics, and test methods depending on the field of their usage and functional purpose. Application of fireproof coating and constructive fireproofing are considered to be one of the most widespread ways to increase fire safetyof wood constructions. The need to improve approaches tothe development and application of fireproofing ofwood materials, methodological assessment of their efficiency providing fire safety are also specified. The evaluation of the fire behavior of the fireproofed wood samples has been carried out. Two methods were used to get the results: Russian National StandardR 53292-2009 “Fireproof compositions and substances for the wood and materialsbased on it. General requirements. Test methods” and EN 13823:2003 (SBI) method.The purpose of test using a single source of flame (SBI) also involves an application of the larger selection model than the standard test methods in order to get the results, which are much closer to the full-scale reference phase of the fire propagation.Several conclusions have been made:whether it is possible to introduce European standards for the assessment of the construction materials fire risk to the national practice and incorporation of the requirements stipulated in the similar European regulations to the Russian standards.
The increased operational properties, main of which - ensuring fire resistance in the conditions of the hydrocarbon mode of the fire, resistance to low temperatures and lack of wet processes at installation are necessary for means of fire protection of structures of buildings and constructions of an oil and gas complex. The review of means of fire protection of new type - the constructive bent fire protection which advantage is the set of positive characteristics as constructive fire protection (a plate, a shell, etc. with dry process of installation), and coverings is submitted (plasters, epoxy structures, etc. with wet process of installation). Domestic experts (LTD Promizol, Moscow) developed the constructive bent fire protection for increase in building constructions of buildings and constructions of an oil and gas complex keeping operational properties in the conditions of the Arctic climate. Means of fire protection represents a grid with 3D - the reinforced structure. The closest analogy are products of the Hapuflam GmbH and FLAMRO companies, but at the moment there are no data on a possibility of use in the conditions of the Arctic region for protection of bearing structures and cable systems.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.