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Nikolaev AV, Krinitsyn NS, Dyadik VF. Coolant-Dosing Control System for the Desublimation Apparatus in Uranium Hexafluoride Production. ATOM ENERGY+ 2021. [DOI: 10.1007/s10512-021-00727-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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2
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Bibikov AV, Nikolaev AV, Tkalya EV. Chemical bonding between thorium atoms and a carbon hexagon in carbon nanomaterials. Phys Chem Chem Phys 2020; 22:22501-22507. [PMID: 32996959 DOI: 10.1039/d0cp03970e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We explore the unusual nature of chemical bonding of thorium atoms with a ring of six carbon atoms (hexagon) in novel carbon materials. Our ab initio calculations of Th-based metallofullerenes (Th@C60 and Th@C20) and Th bound to benzene or coronene at the Hartree-Fock level with the second order perturbation (MP2) correction accounting for the van der Waals interactions demonstrate that the optimal position of the thorium atom is where it faces the center of a hexagon and is located at a distance of 2.01-2.07 Å from the center. For Th encapsulated in C60 it is found at 2.01 Å, whereas the other local energy minima are shifted to larger energies (0.22 eV and higher). Inside C60 the highest local minimum at 1.17 eV is observed when Th faces the center of the five member carbon ring (pentagon). Based on our calculations for Th with benzene and coronene where the global minimum for Th corresponds to its position at 2.05 Å (benzene) or 2.02 Å (coronene) from the hexagon center, we conclude that a well pronounced minimum is likely to be present in graphene and in a single wall carbon nanotube. The ground state of Th is singlet, and other high spin states (triplet and quintet) lie higher in energy (>1.62 eV). We discuss a potential use of carbon nanomaterials with the 229Th isotope having its nuclear transition in the optical range, for metrological purposes.
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Affiliation(s)
- A V Bibikov
- Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University, Moscow 119991, Russia
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3
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Andreischev AR, Chebotarev SY, Mishustina YV, Gorban VV, Nikolaev AV, Rudoman SO. [Surgical-associated expansion of the jaws with asymmetric deformations]. Stomatologiia (Mosk) 2020; 99:33-42. [PMID: 32692517 DOI: 10.17116/stomat20209904133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
One of the most common abnormalities in the development of the jaw is the narrowing of the alveolar process of the maxilla. In childhood, the elimination of such a deformation is quite common. But with age, the only effective option is the inclusion of a surgical procedure in the rehabilitation plan. The medial and parasagittal osteotomy of the maxilla for the purpose of its expansion by a distraction device has a number of important nuances which can significantly affect the result. These include: localization of sagittal osteotomy of the palate and alveolar process; the direction of cutting the walls of the maxillary sinus; type of fixation of the device (dental-borne or bone-borne). The article summarizes the experience of 74 surgical-associated expansions of the jaws with asymmetric deformations performed over 2 years. A retrospective analysis according to cone beam computed tomography is given. of complex treatment with the inclusion of sparing osteotomy of the maxilla in the rehabilitation plan and a differentiated approach to performing surgical manipulation allow to achieve optimal aesthetic and functional results and to correct the asymmetry to the greatest extent.
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Affiliation(s)
- A R Andreischev
- I.V. Pavlov First Saint-Petersburg State Medical University, St. Petersburg, Russia.,Beauty Institute Galaxy Ltd., St. Petersburg, Russia
| | - S Y Chebotarev
- I.V. Pavlov First Saint-Petersburg State Medical University, St. Petersburg, Russia.,Beauty Institute Galaxy Ltd., St. Petersburg, Russia
| | | | - V V Gorban
- Beauty Institute Galaxy Ltd., St. Petersburg, Russia
| | - A V Nikolaev
- North-Western State Medical University named after I.I. Mechnikov, St. Petersburg, Russia
| | - S O Rudoman
- S.M. Kirov Military Medical Academy, Ministry of Defense of the Russian Federation, St. Petersburg, Russia
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Dergacheva DI, Klein OI, Gessler NN, Isakova EP, Deryabina YI, Nikolaev AV. Influence of Natural Polyphenols on Isolated Yeast Dipodascus magnusii Mitochondria. DOKL BIOCHEM BIOPHYS 2020; 490:12-15. [PMID: 32342304 DOI: 10.1134/s1607672920010044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 09/20/2019] [Accepted: 09/20/2019] [Indexed: 11/23/2022]
Abstract
The effect of stilbene polyphenols (resveratrol and pinosilvin) and flavonoids (dihydromyricetin, epigallocatechin, and dihydroquercetin) on producing the reactive oxygen species (ROS) due to cell respiration using the isolated mitochondria of the fungus Dipodascus (Endomyces) magnusii was studied. It was shown that the inhibition of the ROS generation with stilbenes is related to both the oxygen consumption inhibition and their antioxidant properties. The degree of manifestation of polyphenol antioxidant properties depended on the number of hydroxyl groups in a polyphenol molecule. Of the flavonoids tested, dihydromyricetin was most active in reducing the ROS generation, but its inhibitory effect on oxygen consumption by mitochondria was significantly lower as compared to that of the stilbenes. The data obtained show that the mechanism of reducing the ROS generation with polyphenols is associated with both the respiratory inhibition and their antioxidant properties.
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Affiliation(s)
- D I Dergacheva
- Bach Institute of Biochemistry, Federal Research Center "Fundamental Principles of Biotechnology", Russian Academy of Sciences, Moscow, Russia
| | - O I Klein
- Bach Institute of Biochemistry, Federal Research Center "Fundamental Principles of Biotechnology", Russian Academy of Sciences, Moscow, Russia
| | - N N Gessler
- Bach Institute of Biochemistry, Federal Research Center "Fundamental Principles of Biotechnology", Russian Academy of Sciences, Moscow, Russia
| | - E P Isakova
- Bach Institute of Biochemistry, Federal Research Center "Fundamental Principles of Biotechnology", Russian Academy of Sciences, Moscow, Russia
| | - Y I Deryabina
- Bach Institute of Biochemistry, Federal Research Center "Fundamental Principles of Biotechnology", Russian Academy of Sciences, Moscow, Russia.
| | - A V Nikolaev
- Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia
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Isakova EP, Serdyuk EG, Gessler NN, Trubnikova EV, Biryukova YK, Epova EY, Deryabina YI, Nikolaev AV. A New Recombinant Strain of Yarrowia lipolytica Producing Encapsulated Phytase from Obesumbacterium proteus. DOKL BIOCHEM BIOPHYS 2018; 481:201-204. [PMID: 30168059 DOI: 10.1134/s1607672918040063] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Indexed: 11/22/2022]
Abstract
A new recombinant strain of Yarrowia lipolytica synthesizing encapsulated highly thermostable phytase of Obesumbacterium proteus, which is recommended for use as a premix component of feed compositions in animal husbandry, was obtained.
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Affiliation(s)
- E P Isakova
- Bach Institute of Biochemistry, Federal Research Center "Fundamental Principles of Biotechnology,", Russian Academy of Sciences, Moscow, 119071, Russia
| | - E G Serdyuk
- Bach Institute of Biochemistry, Federal Research Center "Fundamental Principles of Biotechnology,", Russian Academy of Sciences, Moscow, 119071, Russia
| | - N N Gessler
- Bach Institute of Biochemistry, Federal Research Center "Fundamental Principles of Biotechnology,", Russian Academy of Sciences, Moscow, 119071, Russia
| | | | | | - E Y Epova
- Kursk State University, Kursk, 305000, Russia
| | - Y I Deryabina
- Bach Institute of Biochemistry, Federal Research Center "Fundamental Principles of Biotechnology,", Russian Academy of Sciences, Moscow, 119071, Russia.
| | - A V Nikolaev
- Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, 123242, Russia
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Nikolaev AV, Andreishchev AR, Kutukova SI. [Comparative biomechanical study of surgically assisted rapid palatal expansion with tooth-borne and bone-borne expanders]. Stomatologiia (Mosk) 2017; 96:48-55. [PMID: 29072647 DOI: 10.17116/stomat201796548-55] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The study objective was to compare the biomechanics of surgically assisted rapid palatal expansion (SARPE) with tooth-borne and bone-borne expanders. Materials include a sample of 54 cone-beam CT of 27 patients who underwent SARPE (bone-borne, n=21; tooth-borne, n=6) before treatment and at expander removal. Expansion efficacy was estimated by interapecal and intercoronal distances between maxillary canines, premolars and first molars as well as Coronal-Apical Index (CAI = coronal expansion (mm)/apical expansion (mm)). CAI varied between 1.5 and 2.0 in the group of patients with bone-borne appliances, and from 2.3 to 2.6 in the tooth-borne appliances group. The maximal amount of vestibular coronal declination was revealed in premolars by the use of tooth-borne appliances. Bone-borne appliances allowed lateralization of maxilla and the most prominent effect of tooth shift in a vestibular direction, which may be seen as the most important factors in a relapse prevention.
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Affiliation(s)
- A V Nikolaev
- North-Western State Medical University Named After I.I. Mechnikov, Saint-Petersburg, Russia
| | - A R Andreishchev
- First Pavlov State Medical University of Saint-Petersburg, Saint-Petersburg, Russia
| | - S I Kutukova
- First Pavlov State Medical University of Saint-Petersburg, Saint-Petersburg, Russia
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Grudyanov AI, Nikolaev AV. [The choice of coating materials for vestibuloplasty and pre- and postoperative use of pain and sedative medications depending on patient emotional features]. Stomatologiia (Mosk) 2017; 95:36-39. [PMID: 28139590 DOI: 10.17116/stomat201695636-39] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The purpose of the message was the comparison of change in the width and quality of keratinized tissue created in the lower vestibuloplasty area. Preliminary results of the case-control study involving 71 patients showed that autotransplantation managed to create the necessary buffer zone with the desired thickness of the mucosa and is particularly justified in cases of «washing board effect». However, the method is technically complicated and more expensive and painfull for patients. The use of alternative materials of artificial origin, such as «Mucograft» and bloodstatic and desinfecting sponge simplifies the procedure technique thereby reducing operational risk but often does not lead to the formation of a fully keratinized gingiva.
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Affiliation(s)
- A I Grudyanov
- Central Research Institute of Dentistry and Maxillofacial Surgery, Ministry of Health, Moscow, Russia an Federation
| | - A V Nikolaev
- Central Research Institute of Dentistry and Maxillofacial Surgery, Ministry of Health, Moscow, Russia an Federation
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Kulanbaewa FF, Sekova VY, Isakova EP, Deryabina YI, Nikolaev AV. Novel efficient promoter of the mitochondrial porin, voltage-dependent anion channel (VDAC), in the genome of the Yarrowia lipolytica yeast. DOKL BIOCHEM BIOPHYS 2016; 470:349-352. [PMID: 27817013 DOI: 10.1134/s1607672916050124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Indexed: 11/23/2022]
Abstract
This article presents the characteristics of the highly inducible promoter of the gene encoding the mitochondrial porin, the voltage-dependent anion channel (VDAC). This promoter is recommended for use in new genetic constructs both in basic research for assessing the adaptive strategy of lower eukaryotes under adverse conditions and in designing new highly competitive transformants producing economically important compounds (proteins, lipids, and organic acids) on its basis.
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Affiliation(s)
- F F Kulanbaewa
- Mendeleev University of Chemical Technology, Miusskaya pl. 9, Moscow, 125190, Russia
| | - V Yu Sekova
- Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology,", Russian Academy of Sciences, Leninskii pr. 33, Moscow, 119071, Russia
| | - E P Isakova
- Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology,", Russian Academy of Sciences, Leninskii pr. 33, Moscow, 119071, Russia
| | - Y I Deryabina
- Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology,", Russian Academy of Sciences, Leninskii pr. 33, Moscow, 119071, Russia.
| | - A V Nikolaev
- Schmidt Joint Institute of Physics of the Earth, Russian Academy of Sciences, ul. Bol'shaya Gruzinskaya 10, Moscow, 123810, Russia
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Andreishchev AR, Kavrayskaya AY, Nikolaev AV. «Surgery first» or two stage complex rehabilitation plan for patients with malocclusions. Stomatologiia (Mosk) 2016; 95:49-52. [PMID: 27636762 DOI: 10.17116/stomat201695449-52] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The article considers stages of complex rehabilitation treatment plans of patients with bite anomalies. The study included 515 patients with various complex malocclusions. Two and conventional three stage treatment plans are described. The article suggests indications for the two stage treatment protocol. The evaluation of efficiency and stability of achieved treatment results obtained with a help of the system of quantitative analysis of dentooralfacial disorders is presented.
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Affiliation(s)
- A R Andreishchev
- First Saint-Petersburg State Medical University named after I.P. Pavlov, Saint-Petersburg, Russia
| | - A Yu Kavrayskaya
- First Saint-Petersburg State Medical University named after I.P. Pavlov, Saint-Petersburg, Russia
| | - A V Nikolaev
- First Saint-Petersburg State Medical University named after I.P. Pavlov, Saint-Petersburg, Russia
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Trubnikova EV, Isakova EP, Deryabina YI, Nikolaev AV. Modified gene lacZ encoding β-galactosidase as efficient transcriptional reporter for the Yarrowia lipolytica yeast. DOKL BIOCHEM BIOPHYS 2016; 468:190-2. [PMID: 27417717 DOI: 10.1134/s160767291603008x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Indexed: 11/23/2022]
Abstract
A modified variant of the β-galactosidase gene from Escherichia coli (lacZ) has been obtained. This was designed for building transcriptional reporter constructs, the product of which possesses a higher proteolytic resistance in the Yarrowia lipolytica yeasts. The study of the activity of mitochondrial voltagedependent porin (voltage-dependent anion channel, VDAC) showed a high efficiency of the reporter system based on the designed lacZ reporter compared to the wild-type lacZ gene.
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Affiliation(s)
| | - E P Isakova
- Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology,", Russian Academy of Sciences, Leninskii pr. 33, Moscow, 119071, Russia.
| | - Yu I Deryabina
- Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology,", Russian Academy of Sciences, Leninskii pr. 33, Moscow, 119071, Russia
| | - A V Nikolaev
- Schmidt Joint Institute of Physics of the Earth, Russian Academy of Sciences, ul. Bol'shaya Gruzinskaya 10, Moscow, 123810, Russia
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Nikolaev AV, Lamoen D, Partoens B. Extension of the basis set of linearized augmented plane wave (LAPW) method by using supplemented tight binding basis functions. J Chem Phys 2016; 145:014101. [PMID: 27394093 DOI: 10.1063/1.4954962] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In order to increase the accuracy of the linearized augmented plane wave (LAPW) method, we present a new approach where the plane wave basis function is augmented by two different atomic radial components constructed at two different linearization energies corresponding to two different electron bands (or energy windows). We demonstrate that this case can be reduced to the standard treatment within the LAPW paradigm where the usual basis set is enriched by the basis functions of the tight binding type, which go to zero with zero derivative at the sphere boundary. We show that the task is closely related with the problem of extended core states which is currently solved by applying the LAPW method with local orbitals (LAPW+LO). In comparison with LAPW+LO, the number of supplemented basis functions in our approach is doubled, which opens up a new channel for the extension of the LAPW and LAPW+LO basis sets. The appearance of new supplemented basis functions absent in the LAPW+LO treatment is closely related with the existence of the u̇l-component in the canonical LAPW method. We discuss properties of additional tight binding basis functions and apply the extended basis set for computation of electron energy bands of lanthanum (face and body centered structures) and hexagonal close packed lattice of cadmium. We demonstrate that the new treatment gives lower total energies in comparison with both canonical LAPW and LAPW+LO, with the energy difference more pronounced for intermediate and poor LAPW basis sets.
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Affiliation(s)
- A V Nikolaev
- Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia and Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia
| | - D Lamoen
- EMAT, Department of Physics, Universiteit Antwerpen, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - B Partoens
- CMT Group, Department of Physics, Universiteit Antwerpen, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
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12
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Grudianov AI, Nikolaev AV. [Comparative study of long term result of auto- and allografts for keratinized gingiva restoration in vestibuloplasty area on the lower jaw]. Stomatologiia (Mosk) 2016; 95:40-43. [PMID: 26925565 DOI: 10.17116/stomat201695140-43] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The purpose of the study was to assess the changes in the width and quality of keratinized tissue created in the area of vestibuloplasty on the lower jaw. Preliminary results of the study showed that autotransplantation method allows creating proper buffer zone with the desired mucosa thickness and is particularly justified in cases of "washing board" effect. However, the method is technically more demanding and is more expensive and painfull for patients. The use of alternative materials of artificial origin, such as "Mucograft" and "Tachocomb" simplifies the execution of operation, thereby reducing operational risk, but often does not lead to the formation of a fully keratinized gingiva.
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Affiliation(s)
- A I Grudianov
- Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow, Russia
| | - A V Nikolaev
- Central Research Institute of Dentistry and Maxillofacial Surgery, Moscow, Russia
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Nikolaev AV, Kartsova LA, Filimonov VV, Sukhanov VL. A microfluidic chip analyzer for determining neurotransmitters. J Anal Chem 2013. [DOI: 10.1134/s1061934813120083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Nikolaev AV, Sizova OV. Synthetic neoglycoconjugates of cell-surface phosphoglycans of Leishmania as potential anti-parasite carbohydrate vaccines. Biochemistry (Mosc) 2012; 76:761-73. [PMID: 21999537 DOI: 10.1134/s0006297911070066] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Leishmania are a genus of sandfly-transmitted protozoan parasites that cause a spectrum of debilitating and often fatal diseases in humans throughout the tropics and subtropics. During the parasite life cycle, Leishmania survive and proliferate in highly hostile environments. Their survival strategies involve the formation of an elaborate and dense cell-surface glycocalyx composed of diverse stage-specific glycoconjugates that form a protective barrier. Phosphoglycans constitute the variable structural and functional domain of major cell-surface lipophosphoglycan and secreted proteophosphoglycans. In this paper, we discuss structural aspects of various phosphoglycans from Leishmania with the major emphasis on the chemical preparation of neoglycoconjugates (neoglycoproteins and neoglycolipids) based on Leishmania lipophosphoglycan structures as well as the immunological evaluation for some of them as potential anti-leishmaniasis vaccines.
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Affiliation(s)
- A V Nikolaev
- College of Life Sciences, Division of Biological Chemistry and Drug Discovery, University of Dundee, UK.
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Sergeev VA, Tsyganenko NA, Smirnov MV, Nikolaev AV, Singer HJ, Baumjohann W. Magnetic effects of the substorm current wedge in a “spread-out wire” model and their comparison with ground, geosynchronous, and tail lobe data. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2011ja016471] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- V. A. Sergeev
- Department of Earth Physics; Saint-Petersburg State University; Petrodvoretz Russia
| | - N. A. Tsyganenko
- Department of Earth Physics; Saint-Petersburg State University; Petrodvoretz Russia
| | - M. V. Smirnov
- Department of Earth Physics; Saint-Petersburg State University; Petrodvoretz Russia
| | - A. V. Nikolaev
- Department of Earth Physics; Saint-Petersburg State University; Petrodvoretz Russia
| | - H. J. Singer
- Space Weather Prediction Center; NOAA; Boulder Colorado USA
| | - W. Baumjohann
- Space Research Institute; Austrian Academy of Sciences; Graz Austria
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Pokhorov VV, Nikolaev AV, Vlasov OA, Burlakov MV. [The long-term follow-up results of the colon cancer treatment]. Khirurgiia (Mosk) 2011:41-43. [PMID: 21423107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Results of treatment of 298 patients with colon cancer in the absence of distant metastases were analyzed. The long-term follow-up results were obtained after up to 20 years; 10 years follow-up results were obtained in 95% of the operated patients. The survival rate was significantly dependant on the stage of the disease, i.e., on the presence of regional lymph nodes invasion. Authors conclude, that possibilities of surgical treatment in further improvement of survival rates are to certain limited and exhausted. Therefore, further workout of perioperative combined chemo- and radiotherapy of patients with colon cancer is expected to improve the results.
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Prprokov VV, Goldobenko GV, Nikolaev AV, Vlasov OA. [Long-term results of surgery and preoperative hypoxyradiotherapy for colorectal cancer]. Vopr Onkol 2011; 57:99-101. [PMID: 21598717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Combined treatment for colorectal cancer involving preoperative hypooxyradiotherapy was used to boost targeted irradiation of tumor cells. End results were significantly improved due to the decrease in the number of distant metastases even in cases of poor prognosis because of lymph node involvement.
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Timofeeva AV, Buravtsev VN, Galatenko OA, Tolstykh IV, Terekhova LP, Nikolaev AV, Baratova LA, Katrukha GS. Study of the sorption of glycopeptide antibiotics on an ultradisperse carbon sorbent. APPL BIOCHEM MICRO+ 2010. [DOI: 10.1134/s0003683810090097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Pyatakov AP, Sergeev AS, Sechin DA, Meshkov GA, Nikolaeva EP, Nikolaev AV, Logginov AS, Zvezdin AK. Magnetic domain wall motion triggered by electric field. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/200/3/032059] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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21
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Barsukov IA, Tkachev SI, Oltarzhevskaia ND, Perevoshchikov AG, Korovina MA, Nikolaev AV, Glebovskaia VV, Kuz'michev DV, Aliev VA, Mamedli ZZ, Pavlova AM. [Polyradiomodification as component of combined treatment of rectal cancer: rationale and results]. Vopr Onkol 2010; 56:66-69. [PMID: 20361619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The report discusses our 30-year experience with surgical and combined treatment of rectal cancer. In cases of preoperative radiotherapy, loco-regional frequency of relapse dropped to 9.6% as compared with surgery (16.3%). After preoperative thermoradiotherapy it fell to 4.6%; polyradiomodification - 0.5% (3-year follow-up). Distant metastasis formation rates were: after polyradiomodification--1.5%, radiotherapy--9.6%, and thermo-radiotherapy--6%. Recurrence-free survival rates (3 years) were: polyradiomodification--97.3%, thermo-radiotherapy--75.9%, radiotherapy--71.1%, and surgery--58%. Data on regimens and dosage of polyradiomodification alongside radiation damage for different combinations of treatment are presented.
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Ivanova VT, Kurochkina IE, Buravtsev VN, Nikolaev AV, Timofeeva AV, Baratova LA. [Interaction of influenza A and B viruses with a carbon-containing sorbent]. Vopr Virusol 2008; 53:40-43. [PMID: 18450109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The investigation demonstrated that influenza A and B viruses actively interacted with a sorbent obtained from modified oxygen-containing graphite via hydrothermal treatment irrespective of the antigenic structure of surface proteins. Virionic sorption occurred in a wide range of temperatures from 8 to 34 degrees C for 15 min or more. After interaction with the sorbent, the titer of a virus decreased 4- to 256-fold. The immobilized viruses were able to interact with homologous antibodies and immune sera. Desorption of viruses with the sorbent was extremely slight. In addition to viruses, the proteins of nonviral nature--those of allantoic hen embryo liquid, immune serum, and 1% bovine serum albumin--could be immobilized to the sorbent.
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Barsukov IA, Tkachev SI, Oltarzhevskaia ND, Korovina MA, Iarmolenko SP, Vaĭnson AA, Perevoshchikov AG, Nikolaev AV, Gradiushko AT, Kutateladze TO, Vlasov OA, Malikho AG, Tamrazov RI, Kuz'michev DV, Aliev VA, Mamedli ZZ. [Combined treatment for rectal cancer using different radiomodification means]. Vopr Onkol 2008; 54:350-353. [PMID: 18652242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The paper presents an evaluation of the results of surgical and combined treatment received by 961 patients at the Center's Clinics within 28 years. The analysis was based on 3 protocols of prospective randomized study. It dealt with assessment of the end results of surgical and combined treatment for operable rectal cancer using one preoperative hyperfractonated STD of 5-25 Gy. That was combined with local microwave hyperthermia and two radio modifiers--local microwave hyperthermia+intrarectal administration of a preparation containing metronidazolum. Due to the latter factor, the rate of 3-year relapse-free survival rose considerably. Also, loco-regional and distant metastasis incidence was cut down due to superior ablasticity of surgery.
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Sarnatskaya VV, Yushko LA, Sakhno LA, Nikolaev VG, Nikolaev AV, Grinenko DV, Mikhalovsky SV. New approaches to the removal of protein-bound toxins from blood plasma of uremic patients. ACTA ACUST UNITED AC 2007; 35:287-308. [PMID: 17573628 DOI: 10.1080/10731190701378618] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The article is devoted to the theoretical aspects of the development of the effective method for the removal of protein-bound uremic toxins. It is shown that the methods of flow and differential scanning microcalorimetry are sufficient enough for the evaluation of the degree of ligand loading of human serum albumin with protein-bound uremic toxins. The molecules of albumin isolated from blood plasma of the patients being kept on chronic dialysis are demonstrating significant alterations of conformation and complex-forming properties, the correction of which by conventional methods of extracorporeal detoxification (exhaustive dialysis, treatment on synthetic SCN carbons) are practically ineffective. Deliganding of uremic albumin may be successfully performed on conventional carbon haemosorbents upon preliminary separation of blood plasma and its dilution with acetate buffer 1:1 at pH = 5.08. Treatment of the whole blood of patients onto new mass-fractal deliganding carbon, i.e., hemosorbents of HSGD trademark. These HSGD haemosorbents quite effectively could be used for restoration of main parameters of uremic HAS molecules conformation and ligand-binding activity simultaneously with hemodialysis upon the protection by locally performed citrate anticoagulation as an easier and cheaper method for the removal of protein-bound uremic toxins.
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Affiliation(s)
- V V Sarnatskaya
- R.E. Kavetsky Institute of Experimental Pathology, Oncology and Radiobiology NAS of Ukraine, Kiev, Ukraine.
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Vetchinkin AV, Lebedinskiĭ KM, Kurapeev IS, Slivin OA, Tsiklinskiĭ SA, Nikolaev AV, Kobak AE. [Comparison of cardiac output measurements by six different methods before and after extracorporeal circulation]. Anesteziol Reanimatol 2007:63-66. [PMID: 18051496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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26
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Beletskaya IP, Karlstedt NB, Nifant’ev EE, Khodarev DV, Kukhareva TS, Nikolaev AV, Ross AJ. Palladium-catalyzed P-arylation of hydrophosphoryl derivatives of protected monosaccharides. Russ J Org Chem 2006. [DOI: 10.1134/s1070428006120049] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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27
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Polenov YV, Sliznev VV, Lapshina SB, Koksharov SA, Nikolaev AV, Egorova EV. Structure and kinetic stability of 1-hydroxy-and aminoalkalnesulfinates in aqueous solutions. RUSS J GEN CHEM+ 2006. [DOI: 10.1134/s1070363206070141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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28
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Barsukov IA, Vlasov OA, Tkachëv SI, Nikolaev AV, Tamrazov RI, Malikhov AG, Iskhagi SK. [Use of combined treatment of rectal cancer involving metastases to regional lymph nodes]. Vopr Onkol 2006; 52:521-4. [PMID: 17168359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Use of combined pre- and intraoperative radiotherapy for rectal cancer involving metastases to regional lymph nodes failed to lower incidence of loco-regional recurrences or improve 5-year results, as compared with pre-operative radiotherapy alone. Besides, distant metastasis rates remained rather high (ca.30%). However, pre-operative radiotherapy plus local SHF-hyperthermia were followed by a significant drop in loco-regional recurrence incidence (to 2.3%), as compared with surgery alone and combined treatment using pre-operative hyper-fractionated-radiotherapy (TTD 25 Gy). Distant metastasis rates dropped to 25%. Also, 5-year survival increased significantly.
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29
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Michel KH, Verberck B, Nikolaev AV. Anisotropic packing and one-dimensional fluctuations of C60 molecules in carbon nanotubes. Phys Rev Lett 2005; 95:185506. [PMID: 16383917 DOI: 10.1103/physrevlett.95.185506] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2005] [Indexed: 05/05/2023]
Abstract
The confinement of a C60 molecule encapsulated in a cylindrical nanotube depends on the tube radius. In small tubes with radius RT approximately < 7 A, a fivefold axis of the molecule coincides with the tube axis. The interaction between C60 molecules in the nanotube is then described by a O2-rotor model on a 1D liquid chain with coupling between orientational and displacive correlations. This coupling leads to chain contraction. The structure factor of the 1D liquid is derived. In tubes with a larger radius the molecular centers of mass are displaced off the tube axis. The distinction of two groups of peapods with on- and off-axis molecules suggests an explanation of the apparent splitting of Ag modes of C60 in nanotubes measured by resonant Raman scattering.
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Affiliation(s)
- K H Michel
- Department of Physics, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
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30
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Nikolaev AV, Rozhilo YA, Starozhilova TK, Sarnatskaya VV, Yushko LA, Mikhailovskii SV, Kholodov AS, Lobanov AI. Mathematical Model of Binding of Albumin—Bilirubin Complex to the Surface of Carbon Pyropolymer. Bull Exp Biol Med 2005; 140:365-9. [PMID: 16307060 DOI: 10.1007/s10517-005-0491-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
We proposed a mathematical model and estimated the parameters of adsorption of albumin-bilirubin complex to the surface of carbon pyropolymer. Design data corresponded to the results of experimental studies. Our findings indicate that modeling of this process should take into account fractal properties of the surface of carbon pyropolymer.
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Affiliation(s)
- A V Nikolaev
- Moscow Physical-and-Technical Institute, State University
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31
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Abstract
Superexchange interactions in alkali fullerides AC(60) are derived for C(60) molecular ions separated by interstitial alkali-metal ions. We use a multiconfiguration approach which comprises the lowest molecular orbital states of the C(60) molecule and the excited s and d states of the alkali-metal atom A. Interactions are described by the valence bond (Heitler-London) method for a complex (C(60)-A-C(60))(-) with two valence electrons. The electronic charge transfer between the alkali-metal atom and a neighboring C(60) molecule is not complete. The occupation probability of excited d and s states of the alkali atom is not negligible. In correspondence with the relative positions of the C(60) molecules and A atoms in the polymer crystal, we consider 180 degrees and 90 degrees (angle) superexchange pathways. For the former case the ground state is found to be a spin singlet separated from a triplet at approximately 20 K. For T<20 K there appear strong spin correlations for the 180 degrees superexchange pathway. The results are related to spin lattice relaxation experiments on CsC(60) in the polymerized and in the quenched cubic phase.
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Affiliation(s)
- A V Nikolaev
- Department of Physics, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, 2610 Antwerpen, Belgium
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32
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Verberck B, Popov VN, Nikolaev AV, Lamoen D. Valence electronic charge density of distorted C60- monomers in polymerized KC60 and RbC60. J Chem Phys 2004; 121:321-7. [PMID: 15260550 DOI: 10.1063/1.1755676] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We investigate the valence electronic charge density of the C(60) (-) monomers in (C(60) (-))(n) polymer chains in K- and RbC(60) by means of a nonorthogonal tight-binding formalism using experimental data on the positions of the carbon atoms. Various configurations of the C(60) cages are considered. Starting from the ideal icosahedral C(60) structure and moving to the realistic, experimentally determined spatial configuration of the C(60) cages in K- and RbC(60), we observe a systematic increase of the electric quadrupole moments on the C(60) (-) monomers. We also confirm the validity of factorizing the charge density of a C(60) (-) monomer into an angular and a radial part.
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Affiliation(s)
- B Verberck
- Department of Physics, University of Antwerp, Universiteitsplein 1, 2610 Antwerp, Belgium
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Nikolaev AV, Michel KH. Comment on "Group-theoretical analysis of the electronic structure data for molecular ions CN+/-60 (Ih) derived from multipole expansion of the Coulomb interelectronic interactions" [J. Chem. Phys. 119, 11429 (2003)]. J Chem Phys 2004; 120:8334. [PMID: 15267755 DOI: 10.1063/1.1695319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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34
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Kuzin SN, Pavlov NN, Semenov SI, Krivoshapkin VG, Indeeva LD, Savvin RG, Nikolaev AV, Alekseeva MN, Chemezova RI, Kuzina LE, Sadikova NV, Lavrov VF, Zverev VV. [Evaluation of morbidity and etiological structure of acute and chronic viral hepatitis in the Sakha Republic (Yakutiia)]. Vopr Virusol 2004; 49:20-3. [PMID: 15017848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
The morbidity of viral hepatitis was epidemiologically analyzed and the etiological structure of severe and chronic viral hepatitis was studied in the Republic of Sakha (Yakutia). Acute viral hepatitis B, whose portion is 43.5%, was found to be of the key significance within the structure of acute viral hepatitis (AVH). Acute viral hepatitis C (with 4.7% in the AVH structure) is by far more rare. The latter is close to the value registered in other Russia's regions. Apart from the prevalence of viral hepatitis B (32.4%) an exceptionally high share of chronic hepatitis delta (24.5%) was established for the etiological structure of chronic viral hepatitis, which is a specificity of the discussed region. The epidemic situation in the Republic of Sakha (Yakutia) was stated to be linked with the mentioned extra dangerous diseases, which requires appropriate emergency measures with the prevention vaccination program against hepatitis B being a priority.
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35
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Kuzin SN, Pavlov NN, Semenov SI, Krivoshapkin VG, Indeeva LD, Savvin RG, Nikolaev AV, Chemezova RI, Kozhevnikova LK, Lavrov VF, Alatortseva GI, Kuzina LE, Sadikova NV, Zverev VV. [Viral hepatitis in different population groups of Republic of Sakha (Iakutia)]. Zh Mikrobiol Epidemiol Immunobiol 2004:18-22. [PMID: 15024975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
A survey for the presence of markers of viral hepatitis B, delta, C and E among different groups of the population of the arctic and agricultural zones of the Republic of Sakha (Yakutia), as well as in Yakutsk, was carried out. The survey revealed that viral hepatitides with the parenteral mechanism of the transmission of infective agents were widely spread among the population. In the arctic zone HBsAg was detected in persons aged 20 years and older in 10.8-17.1% of cases. On the average, in the arctic zone antibodies to virus delta were detected in 2.4% of cases. In different regions of the agricultural zone the detection rate of HBsAg was also high (10.4-23.8%). In the Namsk and Vilyui regions delta infection was registered among adolescents (15-19 years of age) in 8.7 and 22.4% of cases respectively. In the Mountainous region anti-delta antibodies were detected among persons aged 20 years and older in 31% of cases. The survey showed the presence of considerable differences in the detection rate of the markers of hepatitis B, depending on the ethnic origin of the examined patients. Similar tendencies were found to exist with respect to delta infection.
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Affiliation(s)
- S N Kuzin
- Research Institute of Virus Preparations, Moscow, Russia
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36
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Volkov AP, Soldatov VM, Nikolaev AV, Ditrikh II, Isametdinov AA, Ragozin KI, Permiakova LG. [Successful treatment of a patient with a history of pancreatic necrosis and severe multi-organ insufficiency]. Vestn Khir Im I I Grek 2003; 161:96-8. [PMID: 12528633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
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37
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38
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Verberck B, Michel KH, Nikolaev AV. Crystal structures of polymerized fullerides AC60, A=K, Rb, Cs, and alkali-mediated interactions. J Chem Phys 2002. [DOI: 10.1063/1.1475745] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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39
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Christides C, Nikolaev AV, Dennis TJS, Prassides K, Negri F, Orlandi G, Zerbetto F. Inelastic neutron-scattering study of the intramolecular vibrations of the C70 fullerene. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100117a001] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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40
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Yashunsky DV, Higson AP, Ross AJ, Nikolaev AV. An efficient and stereoselective synthesis of beta-D-Arap-(1-->2)-beta-D-Galp-(1-->3)-beta-D-Galp-(1-->4)-alpha-D-Manp, a tetrasaccharide fragment of Leishmania major lipophosphoglycan. Carbohydr Res 2001; 336:243-8. [PMID: 11728392 DOI: 10.1016/s0008-6215(01)00274-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A tetrasaccharide fragment of Leishmania major lipophosphoglycan (which seems to be involved in a biological mechanism for the parasite transmission) has been synthesised using the thioglycoside, trichloroacetimidate and halide-exchange glycosylation procedures and step-wise chain elongation strategy.
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Affiliation(s)
- D V Yashunsky
- School of Life Sciences, Division of Biological Chemistry and Molecular Microbiology, Carnelley Building, University of Dundee, Dundee DD1 4HN, UK
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41
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Kashkin KN, Nikolaev AV, Turbin DA, Perevoshchikov AG. [Deletion of YNZ22 and ALU-VPA/MYCL1 loci in human colonic adenocarcinoma and postoperative prognosis]. Mol Biol (Mosk) 2001; 35:798-804. [PMID: 11605532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Since deletions of the short arm of chromosome 17 are the most common genetic defects in human colorectal carcinoma (CC), we tested the YNZ22 locus (D17S30, 17p13.3) for loss of heterozygosity (LH) in adenocarcinoma and in the normal colonic mucosa of 49 CC patients, and studied the association of LH with clinicomorphological features of the tumor. Allele frequency distribution of YNZ22 did not differ for the patients and healthy people. LH in YNZ22 in the tumor was found in 33% (13/39) of all informative cases, its frequency being thrice higher in men than in women (chi 2 = 5.21, p = 0.022). The defect was associated with moderate or poor histological differentiation (P2 = 0.0055) and polyploidy > 3n (P2 = 0.0035) of tumor cells and with high incidence of post-surgery relapse or metastasis. Analysis of both YNZ22 and Alu-VpA/MycL1 (1p34.3) loci in the tumor allowed reliable relapse prognosis in 76% of the CC patients. The probability of post-surgery relapse or metastasis was estimated at no less than 67% for patients with LH in at least one of the two loci in the tumor, and at somewhat more than 20% for patients without LH.
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42
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Makhovskiĭ VZ, Nikolaev AV, Makhovskiĭ VV. [Anatomic resection of spleen in experiment]. Khirurgiia (Mosk) 2001:27-31. [PMID: 11247019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
The study was carried out in 35 dogs. Basic surgical techniques developed experimentally for organ-saving operations on the spleen are presented. Methods of lobar and segmental resections of the spleen based on detailed study of variants of branching of splenic artery and vein are described. Angiography visualized sharply splenic arteries after lobar and segmental resections, including the stumps of transected arteries. Ultrasonic examination, performed before operation and in different terms after it (3-360 days), specified the size, shape echostructure and anatomic relationship of the spleen with adjacent organs before and after operation.
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43
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Ladnova GG, Istomin AV, Nikolaev AV. [Actual nutrition and vitamin status of school children in the Orla region]. Gig Sanit 2001:54-7. [PMID: 11519465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
The actual nutrition and vitamin provision in 14-17-year-old schoolchildren in Oryol and the Oryol Region were studied within the framework of the working programme. Sanitary recommendations for vitamin prophylaxis were developed. Evidence is provided for the biomedical efficiency of vitamin prophylaxis.
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44
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Kashkin KN, Nikolaev AV, Turbin DA, Perevoschikov AG. Mol Biol 2001; 35:676-681. [DOI: 10.1023/a:1012318119139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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45
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Michel KH, Nikolaev AV. Theory of distinct crystal structures of polymerized fullerides AC60, A = K, Rb, Cs: the specific role of alkalis. Phys Rev Lett 2000; 85:3197-3200. [PMID: 11019300 DOI: 10.1103/physrevlett.85.3197] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2000] [Indexed: 05/23/2023]
Abstract
The polymer phases of AC60 form distinct crystal structures characterized by the mutual orientations of the (C( -)(60))(n) chains. We show that the direct electric quadrupole interaction between chains always favors the orthorhombic structure Pmnn with alternating chain orientations. However, the specific quadrupolar polarizability of the alkali metal ions leads to an indirect interchain coupling which favors the monoclinic structure I2/m with equal chain orientations. The competition between direct and indirect interactions explains the structural difference between KC60 and RbC60, CsC60.
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Affiliation(s)
- K H Michel
- Department of Physics, University of Antwerp, UIA, 2610 Antwerpen, Belgium
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46
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Routier FH, Higson AP, Ivanova IA, Ross AJ, Tsvetkov YE, Yashunsky DV, Bates PA, Nikolaev AV, Ferguson MA. Characterization of the elongating alpha-D-mannosyl phosphate transferase from three species of Leishmania using synthetic acceptor substrate analogues. Biochemistry 2000; 39:8017-25. [PMID: 10891083 DOI: 10.1021/bi000371s] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Leishmania express lipophosphoglycans and proteophosphoglycans that contain Galbeta1-4Manalpha1-P phosphosaccharide repeat structures assembled by the sequential addition of Manalpha1-P and betaGal. The synthetic acceptor substrate Galbeta1-4Manalpha1-P-decenyl and a series of analogues were used to probe Leishmania alpha-D-mannosyl phosphate transferase activity. We show that the activity detected with Galbeta1-4Manalpha1-P-decenyl is the elongating alpha-D-mannosyl phosphate transferase associated with lipophosphoglycan biosynthesis (eMPT(LPG)). Differences in the apparent K(m) values for the donor and acceptor substrates were found using L. major, L. mexicana, and L. donovani promastigote membranes, but total activity correlated with the number of lipophosphoglycan repeats. Further comparisons showed that lesion-derived L. mexicana amastigotes, that do not express lipophosphoglycan, lack eMPT(LPG) and that nondividing L. major metacyclic promastigotes contain 5-fold less eMPT(LPG) activity than dividing procyclic promastigotes. The fine specificity of promastigote eMPT(LPG) activity was determined using 24 synthetic analogues of Galbeta1-4Manalpha1-P-decenyl. The three species gave similar results: the negative charge of the phosphodiester and the C-6 hydroxyl of the alphaMan residue are essential for substrate recognition, the latter most likely acting as a hydrogen bond acceptor. The C-6' hydroxyl of the betaGal residue is required for substrate recognition as well as for catalysis. The rate of Manalpha1-P transfer declines with increasing acceptor substrate chain length. The presence of a monosaccharide substituent at the C-3 position of the terminal betaGal residue abrogates Man-P transfer, showing that chain elongation must precede side chain modification during lipophosphoglycan biosynthesis. In contrast, substitution of the penultimate phosphosaccharide repeat does not abrogate transfer but is slightly stimulatory in L. mexicana and inhibitory in L. major.
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Affiliation(s)
- F H Routier
- Division of Molecular Parasitology and Biological Chemistry, Departments of Biochemistry and Chemistry, University of Dundee, Dundee DD1 5EH, Scotland, U.K
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47
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Kashkin KN, Perevoshchikov AG, Nikolaev AV, Turbin DA, Fleĭshman EV. [Deletion of the Alu-Vpa/MycL1 (1P34.3) locus--a sign of unfavorable prognosis in human colon cancer]. Mol Biol (Mosk) 2000; 34:397-405. [PMID: 10867917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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48
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Kashkin KN, Perevoschikov AG, Nikolaev AV, Turbin DA, Fleischman EW. Deletion of theAlu-VpA/MycL1 (1p34.3) locus is a negative prognostic sign in human colorectal cancer. Mol Biol 2000. [DOI: 10.1007/bf02759663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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49
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Barsukov IA, Tkachev SI, Nikolaev AV, Tamrazov RI, Vlasov OA. [Preoperative thermoradiotherapy in the combined treatment of rectal tumors is the inferior ampullar segmentŏ]. Vopr Onkol 2000; 45:665-9. [PMID: 10703519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Data on the examination of 260 radically-treated patients with rectal tumors in the inferior ampullar segment are presented. 107 patients received surgery alone, another 75--preoperative radiotherapy, while still another 78--preoperative thermoradiotherapy. Combined treatment of stage III tumors significantly reduced recurrence incidence and was followed by significant increase in recurrence-free survival rates. In cases of tumor disseminated to the regional lymph nodes, recurrence-free survival was observed after preoperative thermoradiation only.
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Affiliation(s)
- Iu A Barsukov
- N.N. Blokhin Center for Oncology Research, Russian Academy of Medical Sciences, Moscow
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50
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Abstract
C-reactive protein (CRP) is a major acute phase protein in man. In order to more fully understand the physiological role of this serum protein, we have demonstrated high avidity binding for a defined chemically synthesized carbo-hydrate ligand which represents the repeating disaccharide of lipophosphoglycan, the major surface glycoconjugate of the unicellular parasite Leishmania donovani. Increasing the number of phosphorylated disaccharides in a molecule from one up to seven did not increase the avidity for CRP, however increasing this to 10 potential CRP binding sites did. In order to define the important features of this complex and variable structure for CRP binding we competed CRP binding to whole Leishmania parasites with amino, sulfated, phosphorylated, and unsubstituted monosaccharides, of which only phosphorylated monosaccharides were able to inhibit. Both the carbohydrate and the position of phosphorylation influenced the avidity for CRP. Synthetic oligosaccharides and phospho-oligosaccharides of various lengths and conformations were used to define the structural requirements for CRP recognition. The optimum structure for recognition of a single phosphate group was between two monosaccharide pyranose rings, and within a linear rather than a cyclic molecule. This stresses the importance of the interaction of the CRP binding site with both the carbohydrate and the phosphate group. CRP function may be mediated via the recognition of large arrays of phosphorylated carbohydrates as are characteristic of the surface of microorganisms.
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Affiliation(s)
- F J Culley
- Immunology Unit, Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK and
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