scholarly journals Recent Applications of Magnetic Nanoparticles in Food Analysis

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1140
Author(s):  
Bárbara Socas-Rodríguez ◽  
Antonio V. Herrera-Herrera ◽  
María Asensio-Ramos ◽  
Miguel Ángel Rodríguez-Delgado
Keyword(s):  
Magnetic Nanoparticles ◽  
Food Analysis ◽  
Considerable Increase ◽  
Review Article ◽  
General View ◽  
Consumer Safety ◽  
Considerable Simplification ◽  
The Matrix ◽  
Sensor Signals ◽  
Paramagnetic Properties

Nanotechnology has become a topic of interest due to the outstanding advantages that the use of nanomaterials offers in many fields. Among them, magnetic nanoparticles (m-NPs) have been one of the most widely applied in recent years. In addition to the unique features of nanomaterials in general, which exclusively appear at nanoscale, these present magnetic or paramagnetic properties that result of great interest in many applications. In particular, in the area of food analysis, the use of these nanomaterials has undergone a considerable increase since they can be easily separated from the matrix in sorbent-based extractions, providing a considerable simplification of the procedures. This allows reducing cost and giving fast responses, which is essential in the food trade to guarantee consumer safety. These materials can also be easily tunable, providing higher selectivity. Moreover, their particular electrical, thermal and optical characteristics allow enhancing sensor signals, increasing the sensitivity of the approaches based on this type of device. The aim of this review article is to summarise the most remarkable applications of m-NPs in food analysis in the last five years (2016–2020) showing a general view of the use of such materials in the field.

scholarly journals Microencapsulation of Flaxseed Oil—State of Art

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 295
Author(s):  
Asma Yakdhane ◽  
Sabrine Labidi ◽  
Donia Chaabane ◽  
Anita Tolnay ◽  
Arijit Nath ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Gum Arabic ◽  
Tween 80 ◽  
Flaxseed Oil ◽  
Review Article ◽  
Wall Material ◽  
Physico Chemical ◽  
Comprehensive Information ◽  
The Matrix

Microencapsulation is a well-known technology for the lipid delivery system. It prevents the oxidation of fatty acids and maintains the quality of lipid after extraction from oil seed and processing. In flaxseed oil, the amount of ω-3 and ω-6 polyunsaturated fatty acids are 39.90–60.42% and 12.25–17.44%, respectively. A comprehensive review article on the microencapsulation of flaxseed oil has not been published yet. Realizing the great advantages of flaxseed oil, information about different technologies related to the microencapsulation of flaxseed oil and their characteristics are discussed in a comprehensive way, in this review article. To prepare the microcapsule of flaxseed oil, an emulsion of oil-water is performed along with a wall material (matrix), followed by drying with a spray-dryer or freeze-dryer. Different matrices, such as plant and animal-based proteins, maltodextrin, gum Arabic, and modified starch are used for the encapsulation of flaxseed oil. In some cases, emulsifiers, such as Tween 80 and soya lecithin are used to prepare flaxseed oil microcapsules. Physico-chemical and bio-chemical characteristics of flaxseed oil microcapsules depend on process parameters, ratio of oil and matrix, and characteristics of the matrix. As an example, the size of the microcapsule, prepared with spray-drying and freeze-drying ranges between 10–400 and 20–5000 μm, respectively. It may be considered that the comprehensive information on the encapsulation of flaxseed oil will boost the development of functional foods and biopharmaceuticals.

Small angle reconstruction of plasma luminosity for spherical tokamak

2020 ◽  
Author(s):  
А.Н. Баженов ◽  
П.А. Затылкин
Keyword(s):  
Power Plants ◽  
Essential Feature ◽  
Real Data ◽  
The Body ◽  
Magnetic Sensors ◽  
Test Problems ◽  
General View ◽  
Central Projection ◽  
The Matrix ◽  
Matrix Detector

Публикация посвящена применению методов вычислительной геометрии, интервального анализа и линейного программирования к задачам физики управляемого термоядерного синтеза. Рассмотрены геометрические аспекты проблемы, получены проекции светимостей различных объемов сферического токамака на плоскость матричного детектора, изучены изображения предполагаемых макроскопических структур и микроскопических включений. Для набора модельных распределений светимости объема токамака поставлена задача восстановления сигнала. Решение получено с использованием задач линейного программирования. The problems of reconstruction of plasma luminosity are important for physics and technology of power plants-tokamaks. The Globus-M research tokamak obtained a large amount of data using a matrix detector in pinhole camera geometry. From the mathematical point of view, finding the luminosity for different regions of the plasma volume according to the matrix detector is an inverse problem related to the field of integral geometry. An essential feature of the particular task is the use of a single fixed camera with a small viewing angle. In this regard, application of methods of harmonic analysis of data is not enough. The paper investigates the geometric aspects of the problem. In the general view, a threedimensional object is projected onto a two-dimensional plane through a diaphragm. Under the assumption of azimuthal symmetry, there is a central projection of the luminosity of the body of rotation onto a flat matrix detector. The initial information for the calculation is the plasma boundary obtained from magnetic sensors. There is no reliable information about the internal structure of the plasma, so its division into regions of the equal luminosity is not unambiguous. The paper presents an algorithm for finding the projections of the luminosity of plasma volumes on the plane of the matrix detector. A set of model direct problems for the construction of algorithms for their recognition according to the detector data was investigated. Images of supposed macroscopic structures and microscopic inclusions were obtained. The methodological basis of the work is the use of interval analysis methods for solving geometric and algebraic problems. This approach allows obtaining qualitative and quantitative results that takes into account the uncertainty of the input data with the minimum amount of computational costs. Algebraic solvability is investigated in the interval formulation using response functionality. Solutions for a set of test problems are obtained, which demonstrate the availability of successful reconstruction for real data. An important result of the study is an information about the presence of uncertainties in geometric data and related calculations by obtaining results about the luminosity of the plasma by solving linear programming problems.

Self-healing organic coatings based on microcapsules – A patent-based review

2021 ◽  
Vol 04 ◽  
Author(s):  
Diego Moreira Schlemper ◽  
Sérgio Henrique Pezzin
Keyword(s):  
Corrosion Protection ◽  
State Of The Art ◽  
Review Article ◽  
The State ◽  
Organic Coatings ◽  
Self Healing ◽  
Future Challenges ◽  
The Matrix ◽  
Healing Agent

: Self-healing coatings are intended to increase long-term durability and reliability and can be enabled by the presence of microcapsules containing a self-healing agent capable of interacting with the matrix and regenerating the system. This review article provides an overview of the state-of-the-art, focusing on the patents published in the field of microcapsule-based self-healing organic coatings, since the early 2000’s. A discussion about coatings for corrosion protection and the different self-healing approaches and mechanisms are also addressed, as well as future challenges and expectations for this kind of coatings.

scholarly journals Recent Advancements of Magnetic Nanomaterials in Cancer Therapy

Pharmaceutics ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 147 ◽  
Author(s):  
Sudip Mukherjee ◽  
Lily Liang ◽  
Omid Veiseh
Keyword(s):  
Magnetic Properties ◽  
Magnetic Nanoparticles ◽  
Cancer Therapy ◽  
Cancer Diagnosis ◽  
Cancer Therapeutics ◽  
Review Article ◽  
Clinical Translation ◽  
Magnetic Nanomaterials ◽  
Cancer Targeting ◽  
Potential Toxicity

Magnetic nanomaterials belong to a class of highly-functionalizable tools for cancer therapy owing to their intrinsic magnetic properties and multifunctional design that provides a multimodal theranostics platform for cancer diagnosis, monitoring, and therapy. In this review article, we have provided an overview of the various applications of magnetic nanomaterials and recent advances in the development of these nanomaterials as cancer therapeutics. Moreover, the cancer targeting, potential toxicity, and degradability of these nanomaterials has been briefly addressed. Finally, the challenges for clinical translation and the future scope of magnetic nanoparticles in cancer therapy are discussed.

Food Analysis by Microextraction Methods Based on the Use of Magnetic Nanoparticles as Supports: Recent Advances

2017 ◽  
Vol 10 (9) ◽  
pp. 2974-2993 ◽  
Author(s):  
Aldahir Alberto Hernández-Hernández ◽  
Giaan Arturo Álvarez-Romero ◽  
Elizabeth Contreras-López ◽  
Karina Aguilar-Arteaga ◽  
Araceli Castañeda-Ovando
Keyword(s):  
Magnetic Nanoparticles ◽  
Food Analysis ◽  
Recent Advances

scholarly journals Bioanalytical HPLC Applications of In-Tube Solid Phase Microextraction: A Two-Decade Overview

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2096 ◽  
Author(s):  
Natalia Manousi ◽  
Paraskevas D. Tzanavaras ◽  
Constantinos K. Zacharis
Keyword(s):  
Solid Phase Microextraction ◽  
Considerable Increase ◽  
Solid Phase ◽  
Time Frame ◽  
Review Article ◽  
Treatment Technique ◽  
Sample Treatment ◽  
Research Groups ◽  
The Past ◽  
Bioanalytical Applications

In-tube solid phase microextraction is a cutting-edge sample treatment technique offering significant advantages in terms of miniaturization, green character, automation, and preconcentration prior to analysis. During the past years, there has been a considerable increase in the reported publications, as well as in the research groups focusing their activities on this technique. In the present review article, HPLC bioanalytical applications of in-tube SPME are discussed, covering a wide time frame of twenty years of research reports. Instrumental aspects towards the coupling of in-tube SPME and HPLC are also discussed, and detailed information on materials/coatings and applications in biological samples are provided.

A Data Transfer Integrate System by Using Single Camera

2013 ◽  
Vol 373-375 ◽  
pp. 960-964
Author(s):  
Shyang Lih Chang ◽  
Shih Jia Wang ◽  
Ming Chih Lu ◽  
Cheng Pei Tsai
Keyword(s):  
Data Transfer ◽  
Digital Signal ◽  
Landslide Monitoring ◽  
Single Image ◽  
Integration System ◽  
The Matrix ◽  
Monitoring Camera ◽  
Sensor Signals ◽  
Mountain Terrains ◽  
Monitoring Area

there is a novel data transfer integration system by using single image proposed in this paper. There are many sensors use to monitoring the landslide occurred or not, but the monitoring results have different transmit protocol such as: Wi-Fi, transmit line, 2.4 GHz and ZigBee. This system is a data transfer integration system for all sensors, and it can achieve a real time monitoring system. The system integrate many sensor signals to microprocessor, and convert analog signal to digital signal by using A/D converter, i2c and UART, and the measuring results of sensors and display on a 8*8 matrix LED board. The system use the existing landslide-monitoring camera, and the matrix LED board install in the monitoring area. The result of sensors can be transmit to monitoring center by using single image, the data will not affect by environment, weather and mountain terrains.

Review Article : Rebuilding the Matrix

2002 ◽  
Vol 114 (2) ◽  
pp. 62-63
Author(s):  
Michael Fuller
Keyword(s):  
Review Article ◽  
The Matrix

Temperature Dependence of the FMR Spectra of Polymer Composites with Nanocrystalline α-Fe/C Filler

2007 ◽  
Vol 128 ◽  
pp. 213-218 ◽  
Author(s):  
N. Guskos ◽  
M. Maryniak ◽  
J. Typek ◽  
Iwona Pełech ◽  
Urszula Narkiewicz ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Temperature Dependence ◽  
Nanocrystalline Material ◽  
Magnetic Interactions ◽  
Benzene Rings ◽  
The Matrix ◽  
Nanocrystalline Iron ◽  
The Right ◽  
Ether Ester

Two different concentrations of nanocrystalline material: α-Fe/C were prepared by the carburization of nanocrystalline iron and characterized by XRD and SEM. The nanoparticles were next used as fillers in polymer nanocomposites using the in situ polycondensation reaction in a poly(ether-ester) matrix with two concentrations: 0.1 wt. % and 0.3 wt. %. The temperature dependence of the ferromagnetic resonance (FMR) spectra was investigated to study magnetic interactions in the compounds. The introduced FMR parameters (intensity and position of the right peak) describe well the temperature dependence of FMR spectra of strongly interacting magnetic nanoparticles. The FMR spectra depend strongly on the concentration of magnetic nanoparticles, which influence the magnetic interactions between them. Two main critical points of the matrix (the glass state and the freezing of benzene rings) influence the behaviour of the FMR spectra.

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