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991.
Ryaboshapka D. A. Lokteva E. S. Golubina E. V. Kharlanov A. N. Maslakov K. I. Kamaev A. O. Shumyantsev A. V. Lipatova I. A. Shkol’nikov E. I. 《Kinetics and Catalysis》2021,62(1):127-145
Kinetics and Catalysis - The physicochemical and catalytic properties of 6%Ni/Al2O3 catalysts in the gas-phase hydrodechlorination of chlorobenzene (CB) are studied. The catalysts are synthesized... 相似文献
992.
Zhizhina E. G. Gogin L. L. Rodikova Yu. A. Bukhtiyarov V. I. 《Kinetics and Catalysis》2021,62(2):197-232
Kinetics and Catalysis - A retrospective review based on the authors’ work is devoted to homogeneous catalytic systems based on aqueous solutions of Mo–V–P heteropolyacids (HPA-x,... 相似文献
993.
Kulikov E. A. Turanova V. A. Aleshin S. V. Vasilov R. G. Selishcheva A. A. 《Moscow University Chemistry Bulletin》2021,76(1):27-32
Moscow University Chemistry Bulletin - The conditions for the preparation of astaxanthin ester aggregates are optimized, and their physicochemical characteristics (size and absorption spectra) are... 相似文献
994.
Sulyaeva V. S. Gatapova E. Ya. Kozhevnikov A. K. Rogilo D. I. Saraev A. A. Yushina I. V. Khomyakov M. N. Shapovalova A. A. Shayapov V. R. Bhaskar N. Tu R. Kosinova M. L. 《Journal of Structural Chemistry》2021,62(8):1309-1324
Journal of Structural Chemistry - We report a comprehensive study of the effect of the chemical structure of boron carbonitride films on the variability of their functional characteristics. The... 相似文献
995.
Doroshkevich S. Yu. Artemov K. P. Tereshchenko N. N. Zyubanova T. I. Vorobyov M. S. Akimova E. E. Minaeva O. M. Pokrovskaya E. A. Shin V. I. Torba M. S. Levanisov V. A. 《High Energy Chemistry》2021,55(4):329-335
High Energy Chemistry - The purpose of this work is to optimize the conditions of presowing treatment of spring wheat seeds with a low-energy pulsed electron beam. The absorbed dose in wheat has... 相似文献
996.
Cinthia J. Ramirez-Murillo J. Martin de los Santos-Ramirez Victor H. Perez-Gonzalez 《Electrophoresis》2021,42(5):565-587
Dielectrophoretically driven microfluidic devices have demonstrated great applicability in biomedical engineering, diagnostic medicine, and biological research. One of the potential fields of application for this technology is in point-of-care (POC) devices, ideally allowing for portable, fully integrated, easy to use, low-cost diagnostic platforms. Two main approaches exist to induce dielectrophoresis (DEP) on suspended particles, that is, electrode-based DEP and insulator-based DEP, each featuring different advantages and disadvantages. However, a shared concern lies in the input voltage used to generate the electric field necessary for DEP to take place. Therefore, input voltage can determine portability of a microfluidic device. This review outlines the recent advances in reducing stimulation voltage requirements in DEP-driven microfluidics. 相似文献
997.
Evgeniya V. Polyakova Olga V. Shuvaeva Olga S. Koshcheeva Yuliya E. Tyutereva Ivan P. Pozdnyakov 《Electrophoresis》2021,42(6):719-724
Arsenic aromatic compounds including p-arsanylic acid (pASA) are still widely used in a number of countries as the feed additives in animal breeding resulting in its entering the environment. Under the influence of oxidizing agents or UV radiation, pASA undergoes transformations leading to generation of inorganic arsenic species that are more mobile and toxic than organic ones. On the one hand, an approach based on the treatment of contaminated waters by UV irradiation seems perspective for their detoxification, but the feasibility of this approach depends on the composition of the products forming as a result of photodegradation. In the present work, a CZE was applied for the study of the pASA degradation process during stationary (308 nm) photolysis in the presence of Fe(III)-oxalate complex. A developed assay allowed controlling the parent compounds and also As-containing products of pASA degradation, presented mainly by arsenate and arsenite ions. It was found that the main inorganic derivatives of the pASA photolytic conversions are presented by arsenate and arsenite ions whose ratio depends on the initial amount of pASA and reaction conditions. 相似文献
998.
Pablo Rodriguez-Mateos Bongkot Ngamsom Charlotte E. Dyer Alexander Iles Nicole Pamme 《Electrophoresis》2021,42(21-22):2246-2255
Early detection of pathogenic microorganisms is pivotal to diagnosis and prevention of health and safety crises. Standard methods for pathogen detection often rely on lengthy culturing procedures, confirmed by biochemical assays, leading to >24 h for a diagnosis. The main challenge for pathogen detection is their low concentration within complex matrices. Detection of blood-borne pathogens via techniques such as PCR requires an initial positive blood culture and removal of inhibitory blood components, reducing its potential as a diagnostic tool. Among different label-free microfluidic techniques, inertial focusing on microscale channels holds great promise for automation, parallelization, and passive continuous separation of particles and cells. This work presents inertial microfluidic manipulation of small particles and cells (1–10 μm) in curved serpentine glass channels etched at different depths (deep and shallow designs) that can be exploited for (1) bacteria preconcentration from biological samples and (2) bacteria-blood cell separation. In our shallow device, the ability to focus Escherichia coli into the channel side streams with high recovery (89% at 2.2× preconcentration factor) could be applied for bacteria preconcentration in urine for diagnosis of urinary tract infections. Relying on differential equilibrium positions of red blood cells and E. coli inside the deep device, 97% red blood cells were depleted from 1:50 diluted blood with 54% E. coli recovered at a throughput of 0.7 mL/min. Parallelization of such devices could process relevant volumes of 7 mL whole blood in 10 min, allowing faster sample preparation for downstream molecular diagnostics of bacteria present in bloodstream. 相似文献
999.
Jonatas de Oliveira S. Silva Prof. Mércia V. S. Sant'Anna Dr. Ava Gevaerd MSc. Jéssica B. S. Lima MSc. Michael D. S. Monteiro Dr. Sanny W. M. M. Carvalho Dr. Eliana Midori Sussuchi 《Electroanalysis》2021,33(10):2152-2160
This study introduces modified carbon paste electrodes with carbon nitride nanosheets (CNNS) and outlines their application for the determination of hydroxychloroquine sulfate (HCQ) in tablets and synthetic urine samples. CNNS were synthesized by hydrothermal route (200 °C, 10 h) using melamine and citric acid as their precursors. The carbon nitride nanosheets-based electrode (CNNS/E) presented a linear dynamic range for HCQ (LDR), ranging from 10.0 nmol l−1 to 6.92 μmol l−1, and detection (LOD) and quantification limits (LOQ) of 0.16 nmol l−1 and 0.52 nmol l−1, respectively. LOD and LOQ were calculated by the equations: LOD=3(Sd/b), and LOQ=10(Sd/b). The modified sensor presented excellent relative standard deviations for parameters such as repeatability (2.39 % and 1.87 %) and reproducibility (3.22 % and 2.32 %) in HCQ oxidation peaks (1 and 2). The CNNS/E has not shown significant variations in its anodic signal intensity in the presence of some organic and inorganic substances. It is worth bearing in mind that CNNS/E can be easily manufactured and the sensor has the lowest HCQ detection limits reported so far. The proposed sensor was successfully applied for HCQ determination in tablets and synthetic urine, showing good recovery values and an error of 0.60 % about comparative method in tablet samples, assuring the quality of the method. 相似文献
1000.
In this article, we introduced a novel electrochemical biosensor for the detection of microRNA-126. The biosensor utilizes a hybridization assay combined with multi-walled carbon nanotubes and gold nanorod-decorated screen-printed carbon electrodes. For electrode preparation, gold nanorods were first immobilized onto the surface of bare and multi-walled carbon nanotube-modified screen-printed carbon electrodes, and the thiol tagged-capture probe was immobilized on the electrode surface through gold and thiol group interaction. After the immobilization, thiol tagged-capture probe hybridized with the target sequence. Under optimum conditions, we determined limit of detection (LOD) and limit of quantification (LOQ) as high as 11 nM and 36 nM, respectively. 相似文献