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61.
Iryna Makarchuk Ana Filipa Santos Seica Frédéric Melin Petra Hellwig 《Current Opinion in Electrochemistry》2021
Spectroelectrochemistry, in combination with plasmonic approaches and infrared spectroscopy, has emerged as a powerful tool in the study of membrane protein redox reactions, both for immobilized monolayer samples and those reintroduced into their native environment. Here the use of nanostructured electrodes for surface enhanced spectroelectrochemistry are discussed. 相似文献
62.
Liu Jiangjin García-Salaberri Pablo A. Zenyuk Iryna V. 《Transport in Porous Media》2019,128(2):363-384
Transport in Porous Media - Reaction–diffusion processes in multiscale catalytic porous media are found in a wide range of scientific areas as, for example, electrochemical energy conversion... 相似文献
63.
Iryna N. Berdichevets Hristina R. Shimshilashvili Iryna M. Gerasymenko Yana R. Sindarovska Yuriy V. Sheludko Irina V. Goldenkova-Pavlova 《Analytical and bioanalytical chemistry》2010,397(6):2289-2293
Thermostable lichenase encoded by licB gene of Clostridium thermocellum can be used as a reporter protein in plant, bacterial, yeast, and mammalian cells. It has important advantages of high sensitivity
and specificity in qualitative and quantitative assays. Deletion variants of LicB (e.g., LicBM3) retain its enzymatic activity
and thermostability and can be expressed in translational fusion with target proteins without compromising with their properties.
Fusion with the lichenase reporter is especially convenient for the heterologous expression of proteins whose analysis is
difficult or compromised by host enzyme activities, as it is in case of fatty acid desaturases occurring in all groups of
organisms. Recombinant desaturase-lichenase genes can be used for creating genetically modified (GM) plants with improved
chill tolerance. Development of an analytical method for detection of fused desaturase-lichenase transgenes is necessary both
for production of GM plants and for their certification. Here, we report a multiplex polymerase chain reaction method for
detection of desA and desC desaturase genes of cyanobacteria Synechocystis sp. PCC6803 and Synechococcus vulcanus, respectively, fused to licBM3 reporter in GM plants. 相似文献
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The first heterobimetallic Bi:Sn alkoxide complexes [Bi(2)SnO(OCH(CF(3))(2))(5)(O(t)Bu)(3)(THF)] (1) and [BiSnO(OCH(CF(3))(2))(3)(O(t)Bu)(2)](2) (2) are described. The complexes were obtained through mixing and heating equimolar quantities of the component alkoxides, Bi(OCH(CF(3))(2))(3) and Sn(O(t)Bu)(4), under solvent-free conditions (1) and in THF (2). The solid-state structures were determined by single crystal X-ray diffraction showing ligand redistribution from Bi(III) to Sn(IV) in the two molecular species. Compound 2 behaves as a single-source precursor for the thermolytic formation of bismuth pyrostannate, Bi(2)Sn(2)O(7). 相似文献
66.
Zholt Kormosh Iryna Hunka Yaroslav Bazel Andriy Laganovsky Iryna Mazurenko Nataliya Kormosh 《Central European Journal of Chemistry》2007,5(3):813-823
The potentiometric response characteristics of a diclofenac selective electrode, based on ion association in different plasticizers,
were compared. The sensitivity, working range, detection limit and selectivity of membrane sensors demonstrated significant
dependence on the type of plasticizers. The potentiometric unit presented a linear response toward diclofenac concentrations
between 1 × 10−5 − 5 × 10−2 mol L−1, with slopes of approximately 60 mV dec−1, and exhibited a response time of 3 s. The potentiometric analysis of sodium diclofenac in pharmaceutical formulations was
perfomed by the membrane electrode proposed and compared with the results of potentiometric titration given by the Pharmacopoeia
of Ukraine.
相似文献
67.
Garkusha I Fulara J Nagy A Maier JP 《Journal of the American Chemical Society》2010,132(42):14979-14985
Electronic transitions of protonated benzene (A??(1)B(2)←X??(1)A(1), origin at 325 nm) and α-protonated fulvene (A??(1)A'←X??(1)A', at 335 nm) trapped in 6 K neon matrices have been detected. The cations were produced from several different precursors, mass-selected, and co-deposited with neon. After neutralization of the cations, the electronic transitions of cyclohexadienyl (onsets at 549 and 310 nm) and α-hydrogenated fulvene (532 and 326 nm) radicals were identified. Upon excitation of cyclohexadienyl to the B??(2)B(1) state, photoisomerization to an open-chain structure and α-hydrogenated fulvene was observed. 相似文献
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Ultrasound Doppler methods are widely used in clinical practice as prospective investigational tool to study the vascular system and soft biological tissues. Meanwhile, the most general relationship between the power Doppler spectra, spectral characteristics of the scattering fluctuations and the probing ultrasound field parameters for some clinical implementations are still unexplored. Based upon the continuum model of scattering inhomogeneities, a set of the closed-form expressions for the correlation functions and the spectra of Doppler response of soft tissues and blood have been derived. The influence of the correlation among inhomogeneities and the diffusion processes on the Doppler power spectra formed by stationary flows have been examined. Computer simulations of Doppler spectra were performed for different values of correlation radius and diffusion coefficient. With simulation results the effects of the correlation among inhomogeneities and the diffusion processes on the spectral width and mean frequency are established and discussed in respect to turbulent flows. Closed-form expressions for correlation functions and Doppler spectra for the vibrational sonoelastography technique for visualizing malignant tumors in tissues have been derived. Based on the peculiarities of the obtained Doppler spectra, it is shown that the differentiation of soft tissues with respect to the amplitude value of constrained oscillations is feasible. The expressions were derived for the cases of non-stationary accelerated blood movement. It has been found that the frequency dependence reveals solely at a finite time of observation and depends on the initial phase of the accelerated movement. 相似文献
70.
Sergii Demchenko Roman Lesyk Oleh Yadlovskyi Johannes Zuegg Alysha G. Elliott Iryna Drapak Yuliia Fedchenkova Zinaida Suvorova Anatolii Demchenko 《Molecules (Basel, Switzerland)》2021,26(14)
A series of novel 3-aryl-5H-pyrrolo[1,2-a]imidazole and 5H-imidazo[1,2-a]azepine quaternary salts were synthesized in 58–85% yields via the reaction of 3-aryl-6, 7-dihydro-5H-pyrrolo[1,2-a]imidazoles or 3-aryl-6,7,8,9-tetrahydro-5H-imidazo[1,2-a]azepines and various alkylating reagents. All compounds were characterized by 1H NMR, 13C NMR, and LC-MS. The conducted screening studies of the in vitro antimicrobial activity of the new quaternary salts derivatives established that 15 of the 18 newly synthesized compounds show antibacterial and antifungal activity. Synthesized 3-(3,4-dichlorohenyl)-1-[(4-phenoxyphenylcarbamoyl)-methyl]-6,7-dihydro-5H-pyrrolo[1,2-a]imidazol-1-ium chloride 6c possessed a broad activity spectrum towards Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, Acinetobacter baumannii, and Cryptococcus neoformans, with a high hemolytic activity against human red blood cells and cytotoxicity against HEK-293. However, compound 6c is characterized by a low in vivo toxicity in mice (LD50 > 2000 mg/kg). 相似文献