Elina Nepomnyashchaya

Bio: Elina Nepomnyashchaya is an academic researcher from Saint Petersburg State Polytechnic University. The author has contributed to research in topics: Laser & Ferrofluid. The author has an hindex of 10, co-authored 56 publications receiving 321 citations.

Inverse problem of laser correlation spectroscopy for analysis of polydisperse solutions of nanoparticles

Abstract: A new algorithm for the solution of the inverse problem of laser correlation spectroscopy is suggested. The algorithm allows one to analyse sizes of nanoparticles in polydisperse solutions. Experimental results demonstrating the efficiency of our approach are presented.

Fiber-Optic Super-High-Frequency Signal Transmission System for Sea-Based Radar Station

Abstract: A fiber-optic system for transmission of super-high-frequency signals in the 8-12 GHz range from a multi-component active phased antenna array of a sea-based radar station to an information processing system located in a ship compartment is suggested and investigated. Power loss and total attenuation of optical signals are calculated. The power loss margin and signal transmission time of the system are analyzed. Dependences of the characteristics of the fiberoptic data transmission system on the input signal frequency and temperature are experimentally measured. The fiber-optic data transmission system we have developed can prove an efficient tool for improving interaction between the wireless radar and wired signal transmission systems.

Investigation of ferrofluid nanostructure by laser light scattering: medical applications

Abstract: Investigation of ferrofluids nanostructure by the laser light scattering technique is presented. Experimental studies involved measurements of the intensity of the laser radiation scattered by ferrofluid particles in interaction with albumin and under the influence of magnetic field. The effects of the magnitude and duration of the applied magnetic field on the formation of aggregates of magnetic nanoparticles and also the influence of magnetic fluids of different concentrations on blood proteins are considered. The findings may be useful for medical applications.

On approximation and experimental accuracy in dynamic light scattering

Abstract: The work is dedicated to estimation of accuracy of calculations in dynamic light scattering experiments, in particular approximation and size determination of nanoparticles in polydisperse solutions. In dynamic light scattering the proper approximation is crucial to final accuracy of sizes calculations, especially if we consider polydisperse solutions, such as biological fluids. Calculated and experimental errors have been compared.

I and i

Abstract: There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality. Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

Diagnostic potential of saliva : current state and future applications

Abstract: *This article is free to read on the publisher's website* BACKGROUND: Over the past 10 years, the use of saliva as a diagnostic fluid has gained attention and has become a translational research success story. Some of the current nanotechnologies have been demonstrated to have the analytical sensitivity required for the use of saliva as a diagnostic medium to detect and predict disease progression. However, these technologies have not yet been integrated into current clinical practice and work flow. CONTENT: As a diagnostic fluid, saliva offers advantages over serum because it can be collected noninvasively by individuals with modest training, and it offers a cost-effective approach for the screening of large populations. Gland-specific saliva can also be used for diagnosis of pathology specific to one of the major salivary glands. There is minimal risk of contracting infections during saliva collection, and saliva can be used in clinically challenging situations, such as obtaining samples from children or handicapped or anxious patients, in whom blood sampling could be a difficult act to perform. In this review we highlight the production of and secretion of saliva, the salivary proteome, transportation of biomolecules from blood capillaries to salivary glands, and the diagnostic potential of saliva for use in detection of cardiovascular disease and oral and breast cancers. We also highlight the barriers to application of saliva testing and its advancement in clinical settings. SUMMARY: Saliva has the potential to become a first-line diagnostic sample of choice owing to the advancements in detection technologies coupled with combinations of biomolecules with clinical relevance. (C) 2011 American Association for Clinical Chemistry

Inverse problem of laser correlation spectroscopy for analysis of polydisperse solutions of nanoparticles

Abstract: A new algorithm for the solution of the inverse problem of laser correlation spectroscopy is suggested. The algorithm allows one to analyse sizes of nanoparticles in polydisperse solutions. Experimental results demonstrating the efficiency of our approach are presented.

Nanomaterials for Biomedical Applications: Production, Characterisations, Recent Trends and Difficulties.

Abstract: Designing of nanomaterials has now become a top-priority research goal with a view to developing specific applications in the biomedical fields. In fact, the recent trends in the literature show that there is a lack of in-depth reviews that specifically highlight the current knowledge based on the design and production of nanomaterials. Considerations of size, shape, surface charge and microstructures are important factors in this regard as they affect the performance of nanoparticles (NPs). These parameters are also found to be dependent on their synthesis methods. The characterisation techniques that have been used for the investigation of these nanomaterials are relatively different in their concepts, sample preparation methods and obtained results. Consequently, this review article aims to carry out an in-depth discussion on the recent trends on nanomaterials for biomedical engineering, with a particular emphasis on the choices of the nanomaterials, preparation methods/instruments and characterisations techniques used for designing of nanomaterials. Key applications of these nanomaterials, such as tissue regeneration, medication delivery and wound healing, are also discussed briefly. Covering this knowledge gap will result in a better understanding of the role of nanomaterial design and subsequent larger-scale applications in terms of both its potential and difficulties.

New high-speed system for controlling the parameters of a nuclear reactor in a nuclear power plant

Abstract: The necessity of modernizing current control systems for functional units of a nuclear power plant, as well as the development of new control systems with a high degree of reliability and speed, is substantiated. The advantages of using optical sensors and fiber-optic communication lines to solve these problems are noted. Cases for which it is necessary to develop new fiber-optic sensors for monitoring parameters, for example, the flow of coolant or feed water, are considered. In some of them, it is more expedient to use standard designs of fiber-optic sensors to control the operating parameters of various blocks, for example, to control the electric field strength. A device and a control scheme for the parameters of the units and systems of a nuclear power plant using fiber-optic communication lines have been developed. The results of measuring various parameters of a nuclear reactor are presented. They showed that our proposed fiber-optic control and monitoring system for nuclear power plants operates more reliably and efficiently than systems with analogue control and measurement channels. The use of fiber-optic systems allows real-time remote control and high-speed control in terms of issuing commands to devices. This is very important when servicing a nuclear power plant while it is operating in extreme conditions.