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  JOURNAL "NP" ISSUES

"Nauchnoe Priborostroenie", 2023, Vol. 33, no. 3. ISSN 2312-2951

"NP" 2023 year Vol. 33 no. 3.,   ABSTRACTS

ABSTRACTS, REFERENCES

M. A. Poldushov

DEVELOPMENT OF A DIY PLATFORM FOR DROPLET-BASED MICROFLUIDICS

"Nauchnoe priborostroenie", 2023, vol. 33, no. 3, pp. 3—26.
 

The development of a microfluidic platform for most research laboratories is a difficult task, primarily because of the high cost of its components. In this regard, numerous studies are being carried out to modernize existing or find new methods for manufacturing such devices. The paper discusses the possibility of developing a DIY (Do-It-Yourself) droplet-based microfluidic platform, which includes a fluid delivery system consisting of syringe pumps and microfluidic chips with various geometries. Both syringe pumps and microfluidic chips were fabricated using widely available off-the-shelf components. Some mechanical parts of the pumps were made using 3D printing. The microfluidic setup was controlled using an Arduino UNO board. It was shown that the proposed platform is not inferior to the systems previously reported by other authors on a variety of examples of the generation of emulsions with various forms of morphology.
 

Keywords: microfluidic platform, droplet-based microfluidic, microcontroller boards, Arduino

Author affiliations:

MIREA — Russian Technological University, Moscow, Russia

 
Contacts: Poldushov Maxim Aleksandrovich, poldushov@mail.ru
Article received by the editorial office on 27.05.2023

Full text (In Russ./In Eng.) >>

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S. K. Ilyushonok1,2, A. S. Gladchuk1,3, A. N. Arseniev1, N. V. Tomilin3,
M. N. Krasnov4, E. P. Podolskaya1,3, N. V. Krasnov1

THE SIMPLEST SET OF DROPLET-FREE ELECTROSPRAYING EQUIPMENT
FOR THE DEPOSITION OF METAL OXIDE NANOPARTICLES
ON A MALDI TARGET UNDER NORMAL CONDITIONS

"Nauchnoe Priborostroenie", 2023, vol. 33, no. 3, pp. 27—36.
 

This work presents a scheme for a simplified laboratory setup for the deposition of sorbents – nanoparticles of various metal oxides – on a metal substrate. The setup makes it possible to implement the "lab-on-plate" technique for metal-affinity sorbents on a metal substrate for MALDI mass spectrometric analysis. Using the example of TiO2 sorbent, it is shown that the "lab-on-plate" format can be employed for the extraction of halogen-containing protein adducts.
 

Keywords: sorbents, electrospraying, MALDI mass spectrometry, titanium dioxide, nanoparticles

Author affiliation:

1Institute for Analytical Instrumentation of RAS, Saint-Petersburg
2Research Institute of Hygiene, Occupational Pathology and Human Ecology, FMBA, Saint Petersburg
3Golikov Research Center of Toxicology, Saint Petersburg
4Device Consulting Ltd, Saint Petersburg

 
Contacts: Gladchuk Aleksei Sergeevich, aleglad24@gmail.com
Article received by the editorial office on 28.05.2023

Full text (In Russ./In Eng.) >>

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D. A. Gavrilov1, E. A. Tatarinova1, A. A. Fortunatov1, V. E. Buzdin1,
D. V. Uchaev1, Dm. V. Uchaev1, I. M. Mikhailov1, M. V. Terentiev1,
D. N. Shchelkunov1, Ya. Murhizh1, O. A. Potkin2

DEVELOPMENT OF A PROTOTYPE OF A MULTIFUNCTIONAL
OPTICAL-ELECTRONIC ALL-ROUND VIEWING SYSTEM
TO PROVIDE VISUAL ORIENTATION OF UNMANNED VEHICLES

"Nauchnoe Priborostroenie", 2023, vol. 33, no. 3, pp. 37—48.
 

This paper presents a prototype of a multifunctional optical-electronic system for all-round viewing to provide visual orientation for unmanned vehicles. The developed prototype is designed to be placed on the car roof rack and allows you to control an unmanned vehicle using an online analysis of the environment. Sensor devices collect information about the environment and transmit it to the control system, in which input data is analyzed and actions are planned based on this information, as well as map data and localization. Algorithmic software for building a map and localizing on it using cameras operating in real time allows an unmanned device to navigate in space only using visual information and solve the task of autonomous movement along with orientation on a given terrain map.
 

Keywords: optoelectronic systems, all-round view, unmanned vehicle, situational awareness, visual orientation

Author affiliations:

1Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Russia
2Sber Automotive Technologies, Moscow, Russia

 
Contacts: Tatarinova Elena Aleksandrovna, tatarinova.ea@mipt.ru
Article received by the editorial office on 08.04.2023

Full text (In Russ./In Eng.) >>

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V. L. Odivanov, Ya. V. Fattakhov

IMPROVEMENT OF NMR TECHNIQUES TO INCREASE
ACCURACY OF THE MEASUREMENTS
OF SELF-DIFFUSION AND FLUID MOTION

"Nauchnoe Priborostroenie", 2023, vol. 33, no. 3, pp. 49—59.
 

A method is described for reducing the effect of non-identical gradient pulses on the accuracy of NMR measuring the diffusion parameters of a sample and fluid flow rate using a series of several gradient pulses before the first radio frequency pulse, due to which a dynamic equilibrium is established in the measuring system, as a result of which the impact of gradient impulses levels out. This leads to increased accuracy and extended measurement range.
 

Keywords: NMR, magnetic field pulse gradient, self-diffusion, flow speed, magnetic-resonance imaging

Author affiliations:

Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RAS, Kazan, Russia

 
Contacts: Odivanov Vladimir Leonidovich, odivanov@mail.ru
Article received by the editorial office on 11.04.2023

Full text (In Russ./In Eng.) >>

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B. M. Mamikonyan, S. A. Ghazaryan

MEASUREMENT OF THE COMPONENTS OF THE COMPLEX
RESISTANCE OF MUTUAL INDUCTION

"Nauchnoe Priborostroenie", 2023, vol. 33, no. 3, pp. 60—73.
 

A microcontroller device for digital measurement of the components of the complex resistance of mutual induction of magnetically coupled coils has been developed for the case, when due to the effects of "capacitance" and "eddy currents", an "impurity" and a "phase defect" arise in the EMF of mutual induction. An active component appears in the complex resistance of mutual induction. For invariant measurement of the components of this resistance, a phase method was used in combination with a timing separation of the measurement channel. The measuring circuit (MC) is powered by the current of a controlled generator for sinusoidal signals. An informative parameter of the MC output signal is the angle of the phase shift between two voltages. These voltages are supplied to the analog inputs of the programmable microcontroller (MCU). During the measurement, the MCU sets the generator frequency, controls the switching of the measurement channel, measures the phase shift angle between the MC output voltages, and calculates the components of the complex mutual induction resistance according to the given algorithms. The theory of the method, the technique for calculating the parameters of the MC elements, the evaluation of the sensitivity of the conversion, and the analysis of measurement errors are presented.
 

Keywords: mutual induction, complex resistance, measurement, phase method, phase shift angle, measurement error

Author affiliations:

National polytechnic university of Armenia, Gyumri Branch, Gyumri city, Republic of Armenia

 
Contacts: Mamikonyan Boris Mamikonovich, bomam@yandex.ru
Article received by the editorial office on 08.05.2023

Full text (In Russ./In Eng.) >>

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A. S. Berdnikov, S. V. Masyukevich

NUMERICAL ALGORITHM FOR MINIMAX POLYNOMIAL
APPROXIMATION OF FUNCTIONS WITH A GIVEN WEIGHT

"Nauchnoe Priborostroenie", 2023, vol. 33, no. 3, pp. 74—91.
 

The article discusses a rapidly converging numerical algorithm for determining the coefficients of polynomials. The algorithm provides the optimal approximation of a given function in the minimax norm with a given weight on a given interval. The approximation is made under the condition that the weight function does not turn to zero on the considered interval, except, perhaps, for the initial and/or final points of the interval.
 

Keywords: minimax norm, Chebyshev polynomials, optimal approximation

Author affiliations:

Institute for Analytical Instrumentation of RAS, Saint Petersburg, Russia

 
Contacts: Berdnikov Aleksandr Sergeevich, asberd@yandex.ru
Article received by the editorial office on 28.03.2023

Full text (In Russ./In Eng.) >>

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Ya. A. Fofanov1, I. M. Sokolov1,2, V. V. Manoilov1, A. S. Kuraptsev2

DYNAMIC POLARIZATION-OPTICAL ANALYSIS OF ORDERED
FUNCTIONAL MATERIALS AND NANOSYSTEMS (OVERVIEW)

"Nauchnoe Priborostroenie", 2023, vol. 33, no. 3, pp. 92—116.
 

The instrumental features of transformation and registration of analytical signals in dynamic polarizing optical analysis are considered. The optimal experimental conditions are determined for studying the dynamics of weak polarization responses. A consistent statistical analysis of the polarization magneto-optical responses of magnetic nanofluids in a wide concentration range of three orders of magnitude is described. A quantitative grounding has been obtained for the adequacy of the physical models used and the analytical functions following from them, which describe the orientational ordering of magnetic nanoparticles in an external magnetic field. The detected variations in the prediction errors of diagnostic parameters indicate non-random features of the dynamics of polarization responses and related parameters (properties) of the studied magnetic nanofluids.
Studies of non-resonant nanosystems are supplemented by a theoretical analysis of the dynamics of pulsed scattering of coherent light by atomic ensembles cooled to sub-Doppler temperatures. It is shown that the polarization and spectral composition of the secondary radiation of such ensembles undergo qualitative changes during the afterglow process. This opens up the prospect of developing new experimental and theoretical approaches to the study of various resonant ensembles of point scatterers.
Described in this review theoretical and highly sensitive laser methods of quantitative polarizing optical analysis and the performed statistical analysis of the obtained data form the basis for high-precision polarizing optical nanodiagnostics (quantitative characterization) of ordered functional materials and nanosystems.
The developed methods of polarization nanodiagnostics can be used to study materials, objects, and systems of different nature and composition, for example, metamaterials, biological fluids and tissues, etc.
 

Keywords: laser, polarization-optical analysis, statistical analysis of experimental data, analytical approximation, magnetic nanofluids, optoelectronics, magneto-optics, laser polarization-optical nanodiagnostics

Author affiliations:

1Institute for Analytical Instrumentation of RAS, Saint Petersburg, Russia
2Peter the Great St. Petersburg Polytechnic University, Saint Petersburg, Russia

 
Contacts: Manoylov Vladimir Vladimirovich, manoilov_vv@mail.ru
Article received by the editorial office on 27.06.2023

Full text (In Russ./In Eng.) >>

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B. P. Sharfarets

JUSTIFICATION OF THE POSSIBILITY OF USING
THE HYDRODYNAMIC MODEL OF A VISCOUS INCOMPRESSIBLE FLUID IN SOFTWARE SIMULATION OF THE RADIATED FIELD
OF THE ELECTROOSMOTIC ELECTROACOUSTIC RADIATOR

"Nauchnoe Priborostroenie", 2023, vol. 33, no. 3, pp. 117—124.
 

The paper substantiates the possibility of using a hydrodynamic model – a viscous, incompressible, heat-conductive fluid to calculate the parameters of an electroosmotic flow in a porous medium filled with liquid under the conditions of the application of constant and alternating electric fields to this medium. The conditions of transition to this model from the model of a viscous, compressible fluid are given. The boundaries of the problem parameters are specified, in particular, the boundaries of the flow velocities and frequency limitations, for the justification of such a transition. The acquired results can be used with computational tools to model the aforementioned processes.
 

Keywords: electroosmotic radiator, viscous incompressible fluid, Navier — Stokes equations, general equation of heat transfer, frequency constraints

Author affiliations:

Institute for Analytical Instrumentation of RAS, Saint Petersburg, Russia

 
Contacts: Sharfarets Boris Pinkusovich, sharb@mail.ru
Article received by the editorial office on 16.05.2023

Full text (In Russ./In Eng.) >>

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