Article
Energy & Fuels
Abhishek Punase, Andreas Prakoso, Berna Hascakir
Summary: This study investigated the effects of crude oil characteristics and the presence of clays on the interaction and precipitation tendency of asphaltenes during solvent washing. The results showed that the presence of clays increased the affinity of asphaltenes towards adsorption onto the clay surfaces, resulting in pore plugging and higher asphaltenes precipitation. The elemental composition differences between different crude oils led to variations in precipitation tendencies and porosity reductions. The findings provide insights into factors that influence asphaltene precipitation during solvent washing, which have implications for oil production and processing.
Article
Spectroscopy
Hideyuki Shinzawa, Maito Koga
Summary: An OCT-NIRS system was developed to observe and measure the cross-sectional view and spectrum of a specific area in a polymer sample. This system enables non-invasive imaging and recording of the NIR spectrum in the observed area. It provides key information about the microscopic structure of the polymer and its relationship with the chemical composition.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Multidisciplinary
Tianyang Han, Yajun Wang, Shengjie Ma, Mengfei Li, Ningning Zhu, Songyuan Tao, Jiajun Xu, Bin Sun, Yunlong Jia, Yuewei Zhang, Shoujun Zhu, Bai Yang
Summary: Carbon dots and carbonized polymer dots are a new class of optical materials with wide applications in optoelectronic devices, catalysis, detection, and bioimaging. Researchers have developed a two-step bottom-up strategy to synthesize NIR-CPDs that emit bright fluorescence in both the NIR-I and NIR-II transparent imaging windows. This synthesis method is simple, cost-efficient, and high-yielding, enabling high-performance noninvasive imaging and real-time imaging.
Article
Chemistry, Analytical
Toni Miao, Natasha Sihota, Frank Pfeifer, Cory McDaniel, Marina De Gea Neves, Heinz W. Siesler
Summary: This paper reports on the performance of a handheld Fourier transform near-infrared (FT-NIR) spectrometer for rapid and quantitative determination of total petroleum hydrocarbon (TPH) content of soils. The study developed site-specific partial-least squares (PLS) calibrations and demonstrated the use of locally-weighted PLS (LW-PLS) technique for developing site-independent PLS calibrations. The results show that next-generation portable FT-NIR spectrometers have the potential to become rapid screening tools for predicting low TPH levels in various soil types.
ANALYTICAL CHEMISTRY
(2023)
Article
Medicine, Research & Experimental
Fuyuki F. Inagaki, Hiroaki Wakiyama, Aki Furusawa, Ryuhei Okada, Takuya Kato, Daiki Fujimura, Shuhei Okuyama, Hiroshi Fukushima, Seiichiro Takao, Peter L. Choyke, Hisataka Kobayashi
Summary: Bones are a common site for metastasis from solid tumors, and current treatments are not curative. Near-infrared photoimmunotherapy (NIR-PIT), which uses antibodies labeled with IRDye700DX (IR700) activated by NIR light, has shown success in treating head and neck cancer but has not been tested on bone metastases. This study investigated the efficacy of EGFR-targeted NIR-PIT on bone metastatic lesions using a mouse model and found that it had a therapeutic effect and could repair metastasis-induced bone destruction.
BIOMEDICINE & PHARMACOTHERAPY
(2023)
Article
Geochemistry & Geophysics
Per Avseth, Ivan Lehocki, Oyvind Kjosnes, Odd Sandstad
Summary: This study demonstrates an approach for data-driven rock physics analysis that involves facies classification and establishing local rock physics relations for predicting P-wave and S-wave velocities based on geological input parameters. Local empirical rock physics relations derived from elastic facies with different geological characteristics are recommended over universal models for improving predictability of regression models. These locally derived relations can also be used to create training data for AVO classification.
GEOPHYSICAL PROSPECTING
(2021)
Review
Oncology
Hiroshi Fukushima, Baris Turkbey, Peter A. Pinto, Aki Furusawa, Peter L. Choyke, Hisataka Kobayashi
Summary: Near-infrared photoimmunotherapy (NIR-PIT) is a novel molecularly-targeted therapy that selectively kills cancer cells by injecting an antibody-photoabsorber conjugate (APC) that binds to cancer cells, followed by the application of NIR light. NIR-PIT can selectively kill cancer cells without harming normal tissues and activates anti-cancer immunity.
Article
Chemistry, Analytical
Chao Zhao, Fangyuan Zhou, Kai Lu, Shikui Yang, Baojin Tan, Wanlu Sun, Lina Shangguan, Hai-Yan Wang, Yi Liu
Summary: The study designed and synthesized a novel near-infrared fluorescent probe to detect AChE activity, showing high specificity and sensitivity, as well as good biocompatibility both in vitro and in vivo. The probe provides a rapid and visual strategy for monitoring AChE activity.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Review
Chemistry, Multidisciplinary
Krzysztof B. Bec, Justyna Grabska, Christian W. Huck
Summary: In recent years, the technology of miniaturized near-infrared spectrometers has advanced significantly and had a revolutionary impact in various fields. These instruments employ diverse technological solutions, and continuous progress leads to the emergence of new devices in the market. The current focus in analytical NIR spectroscopy is on evaluating the devices and methods, as well as systematically characterizing their performance profiles.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Jiwon Kim, Sangwon Baek, Jae Yong Park, Kwang Ho Kim, Jong-Lam Lee
Summary: The translated text describes a multilayer film technology for energy-saving windows that selectively blocks near-infrared while maintaining high transmittance in visible light.
Article
Materials Science, Ceramics
Tianyao Liu, Hao Cai, Ning Mao, Zhen Song, Quanlin Liu
Summary: An efficient broadband near-infrared phosphor LiInGe2O6:Cr3+ with good emission performance and quantum efficiencies that match commercial LEDs was demonstrated. By using this phosphor in LED illumination, clear identification of blood vessel distribution under near-infrared camera was achieved.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Biochemistry & Molecular Biology
J. Dikec, N. Bechoua, P. Winckler, J. M. Perrier-Cornet
Summary: The study found that bacterial spores and vegetative cells exhibit similar sensitivity to pulsed NIR, with spores being only 2-fold more resistant than their vegetative counterparts. The research helps eliminate certain hypotheses concerning the main driver of spore inactivation processes, suggesting that damage leading to inactivation is mainly caused by photochemical reactions characterized by multiple possible pathways.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2022)
Article
Chemistry, Applied
Arian Amirvaresi, Nastaran Nikounezhad, Maryam Amirahmadi, Bahram Daraei, Hadi Parastar
Summary: The study found that NIR spectroscopy is more effective than MIR in predicting the origin of saffron samples, while PLS-DA shows high accuracy in detecting adulterants, with NIR demonstrating excellent performance in estimating the level of adulteration.
Article
Engineering, Environmental
Zixuan Li, Qing Pei, Yonghui Zheng, Zhigang Xie, Min Zheng
Summary: This study successfully synthesized fluorescent carbon dots (CDs) with excellent biosafety, stability, dispersibility, and photodynamic activity. The CDs emitted long-lasting near-infrared (NIR) fluorescence, enabling high penetration and long-term in vivo luminescent imaging of deep tissues. Moreover, the CDs generated abundant reactive oxygen species, effectively inhibiting tumor growth. This work demonstrates the enormous potential of CDs as multifunctional nanoplatforms for biomedical applications.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Mohammad-Reza Mohammadi, Sajjad Ansari, Hamid Bahmaninia, Mehdi Ostadhassan, Saeid Norouzi-Apourvari, Abdolhossein Hemmati-Sarapardeh, Mahin Schaffie, Mohammad Ranjbar
Summary: In sandstone reservoirs, magnetite and other iron minerals can lead to asphaltene adsorption and deposition, affecting reservoir rock permeability and oil production. Experimental results show that an increase in nitrogen content and aromatic nature enhances asphaltene adsorption onto magnetite.
Article
Engineering, Multidisciplinary
A. Trofimov, A. Markov, S. G. Abaimov, I. Akhatov, I. Sevostianov
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE
(2018)
Article
Mechanics
A. Markov, S. Abaimov, I Sevostianov, M. Kachanov, S. Kanaun, I Akhatov
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2019)
Article
Chemistry, Multidisciplinary
Alexander Safonov, Evgenii Maltsev, Svyatoslav Chugunov, Andrey Tikhonov, Stepan Konev, Stanislav Evlashin, Dmitry Popov, Alexander Pasko, Iskander Akhatov
APPLIED SCIENCES-BASEL
(2020)
Article
Chemistry, Physical
Aleksandr M. Filimonov, Oleg A. Rogozin, Denis G. Firsov, Yulia O. Kuzminova, Semen N. Sergeev, Alexander P. Zhilyaev, Marat I. Lerner, Nikita E. Toropkov, Alexey P. Simonov, Ivan I. Binkov, Ilya V. Okulov, Iskander S. Akhatov, Stanislav A. Evlashin
Summary: This study investigated the influence of bimodal powder containing nano- and micro-scale particles on the microstructure and material properties, showing an improvement in hardness. Additionally, it was found that powder flowability significantly affects the quality of the built parts.
Review
Polymer Science
Kirill Minchenkov, Alexander Vedernikov, Alexander Safonov, Iskander Akhatov
Summary: This overview examines the use of thermoplastic composites in pultrusion processes in order to analyze the existing gap between thermoset and thermoplastic pultrusions and promote the development of the latter. By investigating the processes, raw materials, and applications of thermoplastic pultrusion, this study aims to identify current issues and propose future research directions for thermoplastic pultrusion.
Article
Materials Science, Multidisciplinary
Dmitry V. Dzhurinskiy, Stanislav S. Dautov, Petr G. Shornikov, Iskander Sh. Akhatov
Summary: This study utilized the plasma electrolytic oxidation (PEO) process to enhance the corrosion resistance properties of high-strength aluminum alloys by forming aluminum oxide coating layers. The PEO-treated aluminum alloy showed significantly higher corrosion resistance compared to the untreated substrate material, with a relationship found between the coating formation stage, process parameters, and the thickness of the oxide-formed layers impacting corrosion resistance properties. The results demonstrate promising potential for industrial applications.
Article
Energy & Fuels
Doston Shayunusov, Dmitry Eskin, Boris V. Balakin, Svyatoslav Chugunov, Stein Tore Johansen, Iskander Akhatov
Summary: Water droplets released from the sea surface contribute to ice accretion on marine vessels. A one-dimensional model was developed to study the freezing of a spherical water droplet in cold air, with validation using STAR CCM+ Computational fluid dynamics (CFD) code. The collision of a partially frozen droplet with a solid wall was also considered, with evaluation of the ratio of crust deformation to thickness.
Article
Chemistry, Physical
Aleksandr M. Filimonov, Oleg A. Rogozin, Oleg N. Dubinin, Yulia O. Kuzminova, Anastasia A. Shibalova, Ilya Okulov, Iskander S. Akhatov, Stanislav A. Evlashin
Summary: This study investigates the effects of a superimposed magnetic field on the microstructure and mechanical properties of additively manufactured metal parts, specifically Inconel 718 superalloy. Theoretical predictions show that the applied magnetic field slightly decreases fluid flow, leading to improved mechanical properties by reducing a hard-to-dissolve Nb-rich phase. The results confirm that an external static magnetic field can modify and enhance the mechanical properties of additively manufactured materials.
Article
Polymer Science
Alexander Vedernikov, Alexander Safonov, Fausto Tucci, Pierpaolo Carlone, Iskander Akhatov
Summary: This study successfully predicted spring-in phenomena in pultruded composite profiles through a numerical model, finding that increasing pulling speeds lead to higher levels of spring-in. The validated model demonstrated the possibility of maintaining the same level of spring-in at increased pulling speeds by using a post-die cooling tool or reducing the chemical shrinkage of the resin.
Article
Chemistry, Multidisciplinary
Dmitry Popov, Yulia Kuzminova, Evgenii Maltsev, Stanislav Evlashin, Alexander Safonov, Iskander Akhatov, Alexander Pasko
Summary: This paper introduces a new CAD/CAM system using function representation of geometry, which enables fast and flexible creation of desired structures through topology optimization algorithms. The system successfully printed and tested designed parts, showing good agreement between simulation and mechanical test results.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Evgenii Maltsev, Dmitry Popov, Svyatoslav Chugunov, Alexander Pasko, Iskander Akhatov
Summary: This paper proposes an accelerated slicing algorithm for FRep 3D objects, allowing for preparation of models for 3D printing without the surface generation stage. By using spatial indexes, a novel compound adaptive criterion, and a novel acceleration criterion, the computational time for contour construction during the slicing process is significantly reduced.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
Alexey Fedorenko, Boris Fedulov, Yulia Kuzminova, Stanislav Evlashin, Oleg Staroverov, Mikhail Tretyakov, Evgeny Lomakin, Iskander Akhatov
Summary: The study found that 316L stainless steel tensile specimens manufactured using the LPBF process exhibit anisotropy, with vertically built specimens showing significantly lower mechanical properties than horizontally built specimens. This difference may be explained by the influence of residual stress on the mechanical behavior.
Article
Chemistry, Multidisciplinary
Timur Aslyamov, Konstantin Sinkov, Iskander Akhatov
Summary: This study develops a nanoscale dynamic electrolyte model to describe the static capacitance and time-dependent charging process of supercapacitors. It finds that the charging time is significantly dependent on the pore size and provides analytical expressions for the relations between time scales and electrode parameters, applied potential, and the final state of the confined electrolyte.
Article
Polymer Science
Alexander Vedernikov, Kirill Minchenkov, Sergey Gusev, Artem Sulimov, Ping Zhou, Chenggao Li, Guijun Xian, Iskander Akhatov, Alexander Safonov
Summary: The choice of manufacturing process, raw materials, and process parameters has a significant impact on the quality of pre-consolidated tapes used in thermoplastic pultrusion. This study compared commercially available tapes to inhouse-made tapes, and found that the inhouse-made tapes produced pultruded composites with higher mechanical properties. Differences in the manufacturing methods of pre-consolidated tapes resulted in variations in glass fiber impregnation and mechanical properties.
Article
Physics, Fluids & Plasmas
Viktor G. Grishaev, Ivan K. Bakulin, Alidad Amirfazli, Iskander S. Akhatov
Summary: This study examines the break-up of viscous films on non-wettable surfaces and highlights the importance of viscous dissipation in both the film and droplet. A new model is proposed to predict the energy required to create a dry spot, showing that the dominant contribution is from dissipation when the ratio of film thicknesses to droplet diameter exceeds 7/4.
